v3.25.2
Shareholder Report, Holdings (Details)
Jun. 30, 2025
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | 1290 VT GAMCO Small Company Value Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | 1290 VT GAMCO Mergers & Acquisitions Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Loomis Sayles Growth Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | EQ/JPMorgan Growth Stock Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | iShares Gold Trust [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Invesco Comstock Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | EQ/JPMorgan Value Opportunities Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | EQ/AB Small Cap Growth Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | EQ/MFS International Growth Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Core Plus Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Alternatives Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.40%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Commodity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 54.20%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Fixed Income [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.70%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 86.30%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.00%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (2.10%)
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS K) | 1290 VT GAMCO Small Company Value Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS K) | 1290 VT GAMCO Mergers & Acquisitions Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS K) | EQ/Loomis Sayles Growth Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS K) | EQ/JPMorgan Growth Stock Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS K) | iShares Gold Trust [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS K) | EQ/Invesco Comstock Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS K) | EQ/JPMorgan Value Opportunities Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS K) | EQ/AB Small Cap Growth Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS K) | EQ/MFS International Growth Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS K) | EQ/Core Plus Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS K) | Alternatives Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.40%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS K) | Commodity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS K) | Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 54.20%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS K) | Fixed Income [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.70%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS K) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 86.30%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS K) | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.00%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS K) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS K) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS K) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (2.10%)
EQ/ALL ASSET GROWTH ALLOCATION PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
EQ/ULTRA CONSERVATIVE STRATEGY PORTFOLIO - (CLASS IB) | EQ/500 Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
EQ/ULTRA CONSERVATIVE STRATEGY PORTFOLIO - (CLASS IB) | EQ/2000 Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
EQ/ULTRA CONSERVATIVE STRATEGY PORTFOLIO - (CLASS IB) | EQ/International Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
EQ/ULTRA CONSERVATIVE STRATEGY PORTFOLIO - (CLASS IB) | EQ/Intermediate Corporate Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
EQ/ULTRA CONSERVATIVE STRATEGY PORTFOLIO - (CLASS IB) | EQ/400 Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
EQ/ULTRA CONSERVATIVE STRATEGY PORTFOLIO - (CLASS IB) | EQ/Intermediate Government Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 66.70%
EQ/ULTRA CONSERVATIVE STRATEGY PORTFOLIO - (CLASS IB) | EQ/Long-Term Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.40%
EQ/ULTRA CONSERVATIVE STRATEGY PORTFOLIO - (CLASS IB) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.30%
EQ/ULTRA CONSERVATIVE STRATEGY PORTFOLIO - (CLASS IB) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 89.60%
EQ/ULTRA CONSERVATIVE STRATEGY PORTFOLIO - (CLASS IB) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.70%
EQ/ULTRA CONSERVATIVE STRATEGY PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.30%)
EQ/CONSERVATIVE STRATEGY PORTFOLIO - (CLASS IB) | EQ/500 Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
EQ/CONSERVATIVE STRATEGY PORTFOLIO - (CLASS IB) | EQ/2000 Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
EQ/CONSERVATIVE STRATEGY PORTFOLIO - (CLASS IB) | EQ/International Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/CONSERVATIVE STRATEGY PORTFOLIO - (CLASS IB) | EQ/Intermediate Corporate Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.70%
EQ/CONSERVATIVE STRATEGY PORTFOLIO - (CLASS IB) | EQ/400 Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
EQ/CONSERVATIVE STRATEGY PORTFOLIO - (CLASS IB) | EQ/AB Short Duration Government Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
EQ/CONSERVATIVE STRATEGY PORTFOLIO - (CLASS IB) | EQ/Intermediate Government Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.20%
EQ/CONSERVATIVE STRATEGY PORTFOLIO - (CLASS IB) | EQ/Core Bond Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.00%
EQ/CONSERVATIVE STRATEGY PORTFOLIO - (CLASS IB) | EQ/Long-Term Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
EQ/CONSERVATIVE STRATEGY PORTFOLIO - (CLASS IB) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.10%
EQ/CONSERVATIVE STRATEGY PORTFOLIO - (CLASS IB) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 79.40%
EQ/CONSERVATIVE STRATEGY PORTFOLIO - (CLASS IB) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.70%
EQ/CONSERVATIVE STRATEGY PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%)
EQ/CONSERVATIVE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/500 Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 24.60%
EQ/CONSERVATIVE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/2000 Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
EQ/CONSERVATIVE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/International Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
EQ/CONSERVATIVE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/Intermediate Corporate Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.90%
EQ/CONSERVATIVE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/400 Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/CONSERVATIVE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/AB Short Duration Government Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
EQ/CONSERVATIVE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/Intermediate Government Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.10%
EQ/CONSERVATIVE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/Core Bond Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 21.80%
EQ/CONSERVATIVE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/Long-Term Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.00%
EQ/CONSERVATIVE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
EQ/CONSERVATIVE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 59.20%
EQ/CONSERVATIVE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 40.80%
EQ/CONSERVATIVE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
EQ/BALANCED STRATEGY PORTFOLIO - (CLASS IB) | EQ/500 Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 30.70%
EQ/BALANCED STRATEGY PORTFOLIO - (CLASS IB) | EQ/2000 Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.20%
EQ/BALANCED STRATEGY PORTFOLIO - (CLASS IB) | EQ/International Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
EQ/BALANCED STRATEGY PORTFOLIO - (CLASS IB) | EQ/Intermediate Corporate Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
EQ/BALANCED STRATEGY PORTFOLIO - (CLASS IB) | EQ/400 Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/BALANCED STRATEGY PORTFOLIO - (CLASS IB) | EQ/AB Short Duration Government Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
EQ/BALANCED STRATEGY PORTFOLIO - (CLASS IB) | EQ/Intermediate Government Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
EQ/BALANCED STRATEGY PORTFOLIO - (CLASS IB) | EQ/Core Bond Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.80%
EQ/BALANCED STRATEGY PORTFOLIO - (CLASS IB) | EQ/Long-Term Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
EQ/BALANCED STRATEGY PORTFOLIO - (CLASS IB) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
EQ/BALANCED STRATEGY PORTFOLIO - (CLASS IB) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 49.10%
EQ/BALANCED STRATEGY PORTFOLIO - (CLASS IB) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 50.90%
EQ/BALANCED STRATEGY PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
EQ/MODERATE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/500 Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 36.70%
EQ/MODERATE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/2000 Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.40%
EQ/MODERATE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/International Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
EQ/MODERATE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/Intermediate Corporate Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
EQ/MODERATE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/400 Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
EQ/MODERATE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/AB Short Duration Government Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
EQ/MODERATE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/Intermediate Government Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
EQ/MODERATE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/Core Bond Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.30%
EQ/MODERATE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/Long-Term Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
EQ/MODERATE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
EQ/MODERATE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 39.10%
EQ/MODERATE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 60.90%
EQ/MODERATE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
EQ/GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/500 Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 42.80%
EQ/GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/2000 Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.80%
EQ/GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/International Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.80%
EQ/GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/Intermediate Corporate Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
EQ/GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/400 Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
EQ/GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/AB Short Duration Government Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/Intermediate Government Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
EQ/GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/Core Bond Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.40%
EQ/GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/Long-Term Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
EQ/GROWTH STRATEGY PORTFOLIO - (CLASS IB) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.10%
EQ/GROWTH STRATEGY PORTFOLIO - (CLASS IB) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 29.20%
EQ/GROWTH STRATEGY PORTFOLIO - (CLASS IB) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 70.90%
EQ/GROWTH STRATEGY PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%)
EQ/AGGRESSIVE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/500 Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 48.90%
EQ/AGGRESSIVE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/2000 Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.00%
EQ/AGGRESSIVE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/International Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.20%
EQ/AGGRESSIVE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/Intermediate Corporate Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
EQ/AGGRESSIVE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/400 Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
EQ/AGGRESSIVE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/AB Short Duration Government Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
EQ/AGGRESSIVE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/Intermediate Government Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
EQ/AGGRESSIVE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/Core Bond Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
EQ/AGGRESSIVE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | EQ/Long-Term Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
EQ/AGGRESSIVE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
EQ/AGGRESSIVE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.20%
EQ/AGGRESSIVE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 80.80%
EQ/AGGRESSIVE GROWTH STRATEGY PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
EQ/CONSERVATIVE ALLOCATION PORTFOLIO - (CLASS IB) | 1290 VT DoubleLine Opportunistic Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
EQ/CONSERVATIVE ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Intermediate Government Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.10%
EQ/CONSERVATIVE ALLOCATION PORTFOLIO - (CLASS IB) | Multimanager Core Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
EQ/CONSERVATIVE ALLOCATION PORTFOLIO - (CLASS IB) | ATM Large Cap Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
EQ/CONSERVATIVE ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Quality Bond PLUS Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
EQ/CONSERVATIVE ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Core Bond Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.80%
EQ/CONSERVATIVE ALLOCATION PORTFOLIO - (CLASS IB) | EQ/PIMCO Ultra Short Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
EQ/CONSERVATIVE ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Long-Term Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
EQ/CONSERVATIVE ALLOCATION PORTFOLIO - (CLASS IB) | 1290 Diversified Bond Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
EQ/CONSERVATIVE ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Core Plus Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
EQ/CONSERVATIVE ALLOCATION PORTFOLIO - (CLASS IB) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.90%
EQ/CONSERVATIVE ALLOCATION PORTFOLIO - (CLASS IB) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 79.10%
EQ/CONSERVATIVE ALLOCATION PORTFOLIO - (CLASS IB) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.80%
EQ/CONSERVATIVE ALLOCATION PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/CONSERVATIVE ALLOCATION PORTFOLIO - (CLASS K) | 1290 VT DoubleLine Opportunistic Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
EQ/CONSERVATIVE ALLOCATION PORTFOLIO - (CLASS K) | EQ/Intermediate Government Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.10%
EQ/CONSERVATIVE ALLOCATION PORTFOLIO - (CLASS K) | Multimanager Core Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
EQ/CONSERVATIVE ALLOCATION PORTFOLIO - (CLASS K) | ATM Large Cap Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
EQ/CONSERVATIVE ALLOCATION PORTFOLIO - (CLASS K) | EQ/Quality Bond PLUS Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
EQ/CONSERVATIVE ALLOCATION PORTFOLIO - (CLASS K) | EQ/Core Bond Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.80%
EQ/CONSERVATIVE ALLOCATION PORTFOLIO - (CLASS K) | EQ/PIMCO Ultra Short Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
EQ/CONSERVATIVE ALLOCATION PORTFOLIO - (CLASS K) | EQ/Long-Term Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
EQ/CONSERVATIVE ALLOCATION PORTFOLIO - (CLASS K) | 1290 Diversified Bond Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
EQ/CONSERVATIVE ALLOCATION PORTFOLIO - (CLASS K) | EQ/Core Plus Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
EQ/CONSERVATIVE ALLOCATION PORTFOLIO - (CLASS K) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.90%
EQ/CONSERVATIVE ALLOCATION PORTFOLIO - (CLASS K) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 79.10%
EQ/CONSERVATIVE ALLOCATION PORTFOLIO - (CLASS K) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.80%
EQ/CONSERVATIVE ALLOCATION PORTFOLIO - (CLASS K) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/CONSERVATIVE-PLUS ALLOCATION PORTFOLIO - (CLASS IB) | 1290 VT DoubleLine Opportunistic Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
EQ/CONSERVATIVE-PLUS ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Intermediate Government Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.30%
EQ/CONSERVATIVE-PLUS ALLOCATION PORTFOLIO - (CLASS IB) | Multimanager Core Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
EQ/CONSERVATIVE-PLUS ALLOCATION PORTFOLIO - (CLASS IB) | ATM Large Cap Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.00%
EQ/CONSERVATIVE-PLUS ALLOCATION PORTFOLIO - (CLASS IB) | ATM International Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
EQ/CONSERVATIVE-PLUS ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Quality Bond PLUS Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
EQ/CONSERVATIVE-PLUS ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Core Bond Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.20%
EQ/CONSERVATIVE-PLUS ALLOCATION PORTFOLIO - (CLASS IB) | EQ/PIMCO Ultra Short Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
EQ/CONSERVATIVE-PLUS ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Long-Term Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
EQ/CONSERVATIVE-PLUS ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Core Plus Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
EQ/CONSERVATIVE-PLUS ALLOCATION PORTFOLIO - (CLASS IB) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.90%
EQ/CONSERVATIVE-PLUS ALLOCATION PORTFOLIO - (CLASS IB) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 58.90%
EQ/CONSERVATIVE-PLUS ALLOCATION PORTFOLIO - (CLASS IB) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 41.00%
EQ/CONSERVATIVE-PLUS ALLOCATION PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/CONSERVATIVE-PLUS ALLOCATION PORTFOLIO - (CLASS K) | 1290 VT DoubleLine Opportunistic Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
EQ/CONSERVATIVE-PLUS ALLOCATION PORTFOLIO - (CLASS K) | EQ/Intermediate Government Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.30%
EQ/CONSERVATIVE-PLUS ALLOCATION PORTFOLIO - (CLASS K) | Multimanager Core Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
EQ/CONSERVATIVE-PLUS ALLOCATION PORTFOLIO - (CLASS K) | ATM Large Cap Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.00%
EQ/CONSERVATIVE-PLUS ALLOCATION PORTFOLIO - (CLASS K) | ATM International Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
EQ/CONSERVATIVE-PLUS ALLOCATION PORTFOLIO - (CLASS K) | EQ/Quality Bond PLUS Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
EQ/CONSERVATIVE-PLUS ALLOCATION PORTFOLIO - (CLASS K) | EQ/Core Bond Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.20%
EQ/CONSERVATIVE-PLUS ALLOCATION PORTFOLIO - (CLASS K) | EQ/PIMCO Ultra Short Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
EQ/CONSERVATIVE-PLUS ALLOCATION PORTFOLIO - (CLASS K) | EQ/Long-Term Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
EQ/CONSERVATIVE-PLUS ALLOCATION PORTFOLIO - (CLASS K) | EQ/Core Plus Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
EQ/CONSERVATIVE-PLUS ALLOCATION PORTFOLIO - (CLASS K) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.90%
EQ/CONSERVATIVE-PLUS ALLOCATION PORTFOLIO - (CLASS K) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 58.90%
EQ/CONSERVATIVE-PLUS ALLOCATION PORTFOLIO - (CLASS K) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 41.00%
EQ/CONSERVATIVE-PLUS ALLOCATION PORTFOLIO - (CLASS K) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS IA) | 1290 VT DoubleLine Opportunistic Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS IA) | EQ/Intermediate Government Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.60%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS IA) | Multimanager Core Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS IA) | ATM Large Cap Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.10%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS IA) | ATM International Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS IA) | ATM Small Cap Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS IA) | EQ/Core Bond Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS IA) | EQ/PIMCO Ultra Short Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS IA) | EQ/Long-Term Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS IA) | EQ/Core Plus Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS IA) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.90%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS IA) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 48.80%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS IA) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 51.10%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS IA) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | 1290 VT DoubleLine Opportunistic Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Intermediate Government Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.60%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Multimanager Core Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | ATM Large Cap Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.10%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | ATM International Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | ATM Small Cap Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Core Bond Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | EQ/PIMCO Ultra Short Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Long-Term Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Core Plus Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.90%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 48.80%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 51.10%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS K) | 1290 VT DoubleLine Opportunistic Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS K) | EQ/Intermediate Government Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.60%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS K) | Multimanager Core Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS K) | ATM Large Cap Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.10%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS K) | ATM International Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS K) | ATM Small Cap Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS K) | EQ/Core Bond Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS K) | EQ/PIMCO Ultra Short Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS K) | EQ/Long-Term Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS K) | EQ/Core Plus Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS K) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.90%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS K) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 48.80%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS K) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 51.10%
EQ/MODERATE ALLOCATION PORTFOLIO - (CLASS K) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/MODERATE-PLUS ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Intermediate Government Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
EQ/MODERATE-PLUS ALLOCATION PORTFOLIO - (CLASS IB) | Multimanager Core Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/MODERATE-PLUS ALLOCATION PORTFOLIO - (CLASS IB) | ATM Large Cap Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.70%
EQ/MODERATE-PLUS ALLOCATION PORTFOLIO - (CLASS IB) | ATM International Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
EQ/MODERATE-PLUS ALLOCATION PORTFOLIO - (CLASS IB) | ATM Small Cap Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.90%
EQ/MODERATE-PLUS ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Large Cap Core Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/MODERATE-PLUS ALLOCATION PORTFOLIO - (CLASS IB) | EQ/AB Small Cap Growth Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
EQ/MODERATE-PLUS ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Core Bond Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
EQ/MODERATE-PLUS ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Long-Term Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
EQ/MODERATE-PLUS ALLOCATION PORTFOLIO - (CLASS IB) | EQ/MFS International Growth Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/MODERATE-PLUS ALLOCATION PORTFOLIO - (CLASS IB) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
EQ/MODERATE-PLUS ALLOCATION PORTFOLIO - (CLASS IB) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.80%
EQ/MODERATE-PLUS ALLOCATION PORTFOLIO - (CLASS IB) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 71.20%
EQ/MODERATE-PLUS ALLOCATION PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
EQ/MODERATE-PLUS ALLOCATION PORTFOLIO - (CLASS K) | EQ/Intermediate Government Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
EQ/MODERATE-PLUS ALLOCATION PORTFOLIO - (CLASS K) | Multimanager Core Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/MODERATE-PLUS ALLOCATION PORTFOLIO - (CLASS K) | ATM Large Cap Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.70%
EQ/MODERATE-PLUS ALLOCATION PORTFOLIO - (CLASS K) | ATM International Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
EQ/MODERATE-PLUS ALLOCATION PORTFOLIO - (CLASS K) | ATM Small Cap Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.90%
EQ/MODERATE-PLUS ALLOCATION PORTFOLIO - (CLASS K) | EQ/Large Cap Core Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/MODERATE-PLUS ALLOCATION PORTFOLIO - (CLASS K) | EQ/AB Small Cap Growth Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
EQ/MODERATE-PLUS ALLOCATION PORTFOLIO - (CLASS K) | EQ/Core Bond Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
EQ/MODERATE-PLUS ALLOCATION PORTFOLIO - (CLASS K) | EQ/Long-Term Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
EQ/MODERATE-PLUS ALLOCATION PORTFOLIO - (CLASS K) | EQ/MFS International Growth Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/MODERATE-PLUS ALLOCATION PORTFOLIO - (CLASS K) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
EQ/MODERATE-PLUS ALLOCATION PORTFOLIO - (CLASS K) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.80%
EQ/MODERATE-PLUS ALLOCATION PORTFOLIO - (CLASS K) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 71.20%
EQ/MODERATE-PLUS ALLOCATION PORTFOLIO - (CLASS K) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
EQ/AGGRESSIVE ALLOCATION PORTFOLIO - (CLASS IB) | ATM Large Cap Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 24.10%
EQ/AGGRESSIVE ALLOCATION PORTFOLIO - (CLASS IB) | ATM International Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.40%
EQ/AGGRESSIVE ALLOCATION PORTFOLIO - (CLASS IB) | ATM Small Cap Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.40%
EQ/AGGRESSIVE ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Large Cap Core Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
EQ/AGGRESSIVE ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Global Equity Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
EQ/AGGRESSIVE ALLOCATION PORTFOLIO - (CLASS IB) | EQ/AB Small Cap Growth Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
EQ/AGGRESSIVE ALLOCATION PORTFOLIO - (CLASS IB) | EQ/ClearBridge Select Equity Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
EQ/AGGRESSIVE ALLOCATION PORTFOLIO - (CLASS IB) | EQ/International Value Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/AGGRESSIVE ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Large Cap Value Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
EQ/AGGRESSIVE ALLOCATION PORTFOLIO - (CLASS IB) | EQ/MFS International Growth Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
EQ/AGGRESSIVE ALLOCATION PORTFOLIO - (CLASS IB) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
EQ/AGGRESSIVE ALLOCATION PORTFOLIO - (CLASS IB) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.70%
EQ/AGGRESSIVE ALLOCATION PORTFOLIO - (CLASS IB) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 91.30%
EQ/AGGRESSIVE ALLOCATION PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
EQ/AGGRESSIVE ALLOCATION PORTFOLIO - (CLASS K) | ATM Large Cap Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 24.10%
EQ/AGGRESSIVE ALLOCATION PORTFOLIO - (CLASS K) | ATM International Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.40%
EQ/AGGRESSIVE ALLOCATION PORTFOLIO - (CLASS K) | ATM Small Cap Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.40%
EQ/AGGRESSIVE ALLOCATION PORTFOLIO - (CLASS K) | EQ/Large Cap Core Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
EQ/AGGRESSIVE ALLOCATION PORTFOLIO - (CLASS K) | EQ/Global Equity Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
EQ/AGGRESSIVE ALLOCATION PORTFOLIO - (CLASS K) | EQ/AB Small Cap Growth Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
EQ/AGGRESSIVE ALLOCATION PORTFOLIO - (CLASS K) | EQ/ClearBridge Select Equity Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
EQ/AGGRESSIVE ALLOCATION PORTFOLIO - (CLASS K) | EQ/International Value Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/AGGRESSIVE ALLOCATION PORTFOLIO - (CLASS K) | EQ/Large Cap Value Managed Volatility Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
EQ/AGGRESSIVE ALLOCATION PORTFOLIO - (CLASS K) | EQ/MFS International Growth Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
EQ/AGGRESSIVE ALLOCATION PORTFOLIO - (CLASS K) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
EQ/AGGRESSIVE ALLOCATION PORTFOLIO - (CLASS K) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.70%
EQ/AGGRESSIVE ALLOCATION PORTFOLIO - (CLASS K) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 91.30%
EQ/AGGRESSIVE ALLOCATION PORTFOLIO - (CLASS K) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | Vanguard Total Bond Market ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | 1290 SmartBeta Equity Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.60%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | 1290 GAMCO Small/Mid Cap Value Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | iShares MSCI Global Min Vol Factor ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | 1290 Essex Small Cap Growth Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | Vanguard FTSE Emerging Markets ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | iShares Core S&P U.S. Growth ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | 1290 High Yield Bond Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | SPDR Portfolio Developed World ex-US ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | 1290 Diversified Bond Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 35.40%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 21.00%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | Fixed Income [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 44.30%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 65.30%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.90%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.60%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.30%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS K) | Vanguard Total Bond Market ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS K) | 1290 SmartBeta Equity Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.60%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS K) | 1290 GAMCO Small/Mid Cap Value Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS K) | iShares MSCI Global Min Vol Factor ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS K) | 1290 Essex Small Cap Growth Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS K) | Vanguard FTSE Emerging Markets ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS K) | iShares Core S&P U.S. Growth ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS K) | 1290 High Yield Bond Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS K) | SPDR Portfolio Developed World ex-US ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS K) | 1290 Diversified Bond Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 35.40%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS K) | Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 21.00%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS K) | Fixed Income [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 44.30%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS K) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 65.30%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS K) | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.90%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS K) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.60%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS K) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.30%
EQUITABLE CONSERVATIVE GROWTH MF/ETF PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | 1290 SmartBeta Equity Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.10%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | 1290 GAMCO Small/Mid Cap Value Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | iShares MSCI Global Min Vol Factor ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | 1290 Essex Small Cap Growth Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | Vanguard FTSE Emerging Markets ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | iShares Core S&P U.S. Growth ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | 1290 Avantis U.S. Large Cap Growth Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | 1290 High Yield Bond Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | SPDR Portfolio Developed World ex-US ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | 1290 Diversified Bond Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 25.40%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 37.60%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | Fixed Income [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.00%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 68.60%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 29.70%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.10%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS K) | 1290 SmartBeta Equity Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.10%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS K) | 1290 GAMCO Small/Mid Cap Value Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS K) | iShares MSCI Global Min Vol Factor ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS K) | 1290 Essex Small Cap Growth Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS K) | Vanguard FTSE Emerging Markets ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS K) | iShares Core S&P U.S. Growth ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS K) | 1290 Avantis U.S. Large Cap Growth Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS K) | 1290 High Yield Bond Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS K) | SPDR Portfolio Developed World ex-US ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS K) | 1290 Diversified Bond Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 25.40%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS K) | Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 37.60%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS K) | Fixed Income [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.00%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS K) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 68.60%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS K) | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 29.70%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS K) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS K) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.10%
EQUITABLE MODERATE GROWTH MF/ETF PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | 1290 SmartBeta Equity Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.40%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | 1290 GAMCO Small/Mid Cap Value Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.40%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | iShares MSCI Global Min Vol Factor ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.00%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | 1290 Essex Small Cap Growth Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | Vanguard FTSE Emerging Markets ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | iShares Core S&P U.S. Growth ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | 1290 Avantis U.S. Large Cap Growth Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | 1290 High Yield Bond Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | SPDR Portfolio Developed World ex-US ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | 1290 Diversified Bond Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 54.20%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | Fixed Income [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.00%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.70%)
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 70.20%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 27.80%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 26.10%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS K) | 1290 SmartBeta Equity Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.40%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS K) | 1290 GAMCO Small/Mid Cap Value Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.40%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS K) | iShares MSCI Global Min Vol Factor ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.00%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS K) | 1290 Essex Small Cap Growth Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS K) | Vanguard FTSE Emerging Markets ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS K) | iShares Core S&P U.S. Growth ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS K) | 1290 Avantis U.S. Large Cap Growth Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS K) | 1290 High Yield Bond Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS K) | SPDR Portfolio Developed World ex-US ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS K) | 1290 Diversified Bond Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS K) | Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 54.20%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS K) | Fixed Income [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.00%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.70%)
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS K) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 70.20%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS K) | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 27.80%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS K) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS K) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 26.10%
EQUITABLE GROWTH MF/ETF PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
TARGET 2015 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Janus Enterprise Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
TARGET 2015 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Quality Bond PLUS Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
TARGET 2015 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Core Bond Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
TARGET 2015 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/PIMCO Ultra Short Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.80%
TARGET 2015 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Long-Term Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
TARGET 2015 ALLOCATION PORTFOLIO - (CLASS IB) | 1290 Diversified Bond Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.10%
TARGET 2015 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Equity 500 Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.60%
TARGET 2015 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/International Equity Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
TARGET 2015 ALLOCATION PORTFOLIO - (CLASS IB) | 1290 VT High Yield Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.90%
TARGET 2015 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Core Plus Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.50%
TARGET 2015 ALLOCATION PORTFOLIO - (CLASS IB) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
TARGET 2015 ALLOCATION PORTFOLIO - (CLASS IB) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 76.20%
TARGET 2015 ALLOCATION PORTFOLIO - (CLASS IB) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.80%
TARGET 2015 ALLOCATION PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
TARGET 2015 ALLOCATION PORTFOLIO - (CLASS K) | EQ/Janus Enterprise Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
TARGET 2015 ALLOCATION PORTFOLIO - (CLASS K) | EQ/Quality Bond PLUS Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
TARGET 2015 ALLOCATION PORTFOLIO - (CLASS K) | EQ/Core Bond Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
TARGET 2015 ALLOCATION PORTFOLIO - (CLASS K) | EQ/PIMCO Ultra Short Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.80%
TARGET 2015 ALLOCATION PORTFOLIO - (CLASS K) | EQ/Long-Term Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
TARGET 2015 ALLOCATION PORTFOLIO - (CLASS K) | 1290 Diversified Bond Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.10%
TARGET 2015 ALLOCATION PORTFOLIO - (CLASS K) | EQ/Equity 500 Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.60%
TARGET 2015 ALLOCATION PORTFOLIO - (CLASS K) | EQ/International Equity Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
TARGET 2015 ALLOCATION PORTFOLIO - (CLASS K) | 1290 VT High Yield Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.90%
TARGET 2015 ALLOCATION PORTFOLIO - (CLASS K) | EQ/Core Plus Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.50%
TARGET 2015 ALLOCATION PORTFOLIO - (CLASS K) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
TARGET 2015 ALLOCATION PORTFOLIO - (CLASS K) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 76.20%
TARGET 2015 ALLOCATION PORTFOLIO - (CLASS K) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.80%
TARGET 2015 ALLOCATION PORTFOLIO - (CLASS K) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
TARGET 2025 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Quality Bond PLUS Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
TARGET 2025 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Core Bond Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
TARGET 2025 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/PIMCO Ultra Short Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.20%
TARGET 2025 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Long-Term Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
TARGET 2025 ALLOCATION PORTFOLIO - (CLASS IB) | 1290 Diversified Bond Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
TARGET 2025 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Equity 500 Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.60%
TARGET 2025 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/International Equity Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
TARGET 2025 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Small Company Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
TARGET 2025 ALLOCATION PORTFOLIO - (CLASS IB) | 1290 VT High Yield Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.90%
TARGET 2025 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Core Plus Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
TARGET 2025 ALLOCATION PORTFOLIO - (CLASS IB) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.30%
TARGET 2025 ALLOCATION PORTFOLIO - (CLASS IB) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 47.30%
TARGET 2025 ALLOCATION PORTFOLIO - (CLASS IB) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 53.00%
TARGET 2025 ALLOCATION PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.30%)
TARGET 2025 ALLOCATION PORTFOLIO - (CLASS K) | EQ/Quality Bond PLUS Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
TARGET 2025 ALLOCATION PORTFOLIO - (CLASS K) | EQ/Core Bond Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
TARGET 2025 ALLOCATION PORTFOLIO - (CLASS K) | EQ/PIMCO Ultra Short Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.20%
TARGET 2025 ALLOCATION PORTFOLIO - (CLASS K) | EQ/Long-Term Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
TARGET 2025 ALLOCATION PORTFOLIO - (CLASS K) | 1290 Diversified Bond Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
TARGET 2025 ALLOCATION PORTFOLIO - (CLASS K) | EQ/Equity 500 Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.60%
TARGET 2025 ALLOCATION PORTFOLIO - (CLASS K) | EQ/International Equity Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
TARGET 2025 ALLOCATION PORTFOLIO - (CLASS K) | EQ/Small Company Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
TARGET 2025 ALLOCATION PORTFOLIO - (CLASS K) | 1290 VT High Yield Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.90%
TARGET 2025 ALLOCATION PORTFOLIO - (CLASS K) | EQ/Core Plus Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
TARGET 2025 ALLOCATION PORTFOLIO - (CLASS K) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.30%
TARGET 2025 ALLOCATION PORTFOLIO - (CLASS K) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 47.30%
TARGET 2025 ALLOCATION PORTFOLIO - (CLASS K) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 53.00%
TARGET 2025 ALLOCATION PORTFOLIO - (CLASS K) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.30%)
TARGET 2035 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/PIMCO Ultra Short Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
TARGET 2035 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Long-Term Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
TARGET 2035 ALLOCATION PORTFOLIO - (CLASS IB) | 1290 Diversified Bond Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
TARGET 2035 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Equity 500 Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 33.90%
TARGET 2035 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/International Equity Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.00%
TARGET 2035 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Small Company Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
TARGET 2035 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/MFS International Growth Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
TARGET 2035 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Emerging Markets Equity PLUS Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
TARGET 2035 ALLOCATION PORTFOLIO - (CLASS IB) | 1290 VT High Yield Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
TARGET 2035 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Core Plus Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
TARGET 2035 ALLOCATION PORTFOLIO - (CLASS IB) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
TARGET 2035 ALLOCATION PORTFOLIO - (CLASS IB) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.00%
TARGET 2035 ALLOCATION PORTFOLIO - (CLASS IB) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 72.00%
TARGET 2035 ALLOCATION PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
TARGET 2035 ALLOCATION PORTFOLIO - (CLASS K) | EQ/PIMCO Ultra Short Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
TARGET 2035 ALLOCATION PORTFOLIO - (CLASS K) | EQ/Long-Term Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
TARGET 2035 ALLOCATION PORTFOLIO - (CLASS K) | 1290 Diversified Bond Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
TARGET 2035 ALLOCATION PORTFOLIO - (CLASS K) | EQ/Equity 500 Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 33.90%
TARGET 2035 ALLOCATION PORTFOLIO - (CLASS K) | EQ/International Equity Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.00%
TARGET 2035 ALLOCATION PORTFOLIO - (CLASS K) | EQ/Small Company Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
TARGET 2035 ALLOCATION PORTFOLIO - (CLASS K) | EQ/MFS International Growth Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
TARGET 2035 ALLOCATION PORTFOLIO - (CLASS K) | EQ/Emerging Markets Equity PLUS Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
TARGET 2035 ALLOCATION PORTFOLIO - (CLASS K) | 1290 VT High Yield Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
TARGET 2035 ALLOCATION PORTFOLIO - (CLASS K) | EQ/Core Plus Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
TARGET 2035 ALLOCATION PORTFOLIO - (CLASS K) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
TARGET 2035 ALLOCATION PORTFOLIO - (CLASS K) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.00%
TARGET 2035 ALLOCATION PORTFOLIO - (CLASS K) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 72.00%
TARGET 2035 ALLOCATION PORTFOLIO - (CLASS K) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
TARGET 2045 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Long-Term Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
TARGET 2045 ALLOCATION PORTFOLIO - (CLASS IB) | 1290 Diversified Bond Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
TARGET 2045 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Equity 500 Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 38.80%
TARGET 2045 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/International Equity Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.80%
TARGET 2045 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Small Company Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.70%
TARGET 2045 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/MFS International Growth Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
TARGET 2045 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Emerging Markets Equity PLUS Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
TARGET 2045 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Value Equity Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
TARGET 2045 ALLOCATION PORTFOLIO - (CLASS IB) | 1290 VT High Yield Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
TARGET 2045 ALLOCATION PORTFOLIO - (CLASS IB) | EQ/Core Plus Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
TARGET 2045 ALLOCATION PORTFOLIO - (CLASS IB) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
TARGET 2045 ALLOCATION PORTFOLIO - (CLASS IB) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.00%
TARGET 2045 ALLOCATION PORTFOLIO - (CLASS IB) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 82.00%
TARGET 2045 ALLOCATION PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
TARGET 2045 ALLOCATION PORTFOLIO - (CLASS K) | EQ/Long-Term Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
TARGET 2045 ALLOCATION PORTFOLIO - (CLASS K) | 1290 Diversified Bond Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
TARGET 2045 ALLOCATION PORTFOLIO - (CLASS K) | EQ/Equity 500 Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 38.80%
TARGET 2045 ALLOCATION PORTFOLIO - (CLASS K) | EQ/International Equity Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.80%
TARGET 2045 ALLOCATION PORTFOLIO - (CLASS K) | EQ/Small Company Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.70%
TARGET 2045 ALLOCATION PORTFOLIO - (CLASS K) | EQ/MFS International Growth Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
TARGET 2045 ALLOCATION PORTFOLIO - (CLASS K) | EQ/Emerging Markets Equity PLUS Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
TARGET 2045 ALLOCATION PORTFOLIO - (CLASS K) | EQ/Value Equity Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
TARGET 2045 ALLOCATION PORTFOLIO - (CLASS K) | 1290 VT High Yield Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
TARGET 2045 ALLOCATION PORTFOLIO - (CLASS K) | EQ/Core Plus Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
TARGET 2045 ALLOCATION PORTFOLIO - (CLASS K) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
TARGET 2045 ALLOCATION PORTFOLIO - (CLASS K) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.00%
TARGET 2045 ALLOCATION PORTFOLIO - (CLASS K) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 82.00%
TARGET 2045 ALLOCATION PORTFOLIO - (CLASS K) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
TARGET 2055 ALLOCATION PORTFOLIO (CLASS IB) | EQ/Equity 500 Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 41.60%
TARGET 2055 ALLOCATION PORTFOLIO (CLASS IB) | EQ/International Equity Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.40%
TARGET 2055 ALLOCATION PORTFOLIO (CLASS IB) | EQ/Small Company Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.80%
TARGET 2055 ALLOCATION PORTFOLIO (CLASS IB) | EQ/MFS International Growth Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
TARGET 2055 ALLOCATION PORTFOLIO (CLASS IB) | EQ/Emerging Markets Equity PLUS Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
TARGET 2055 ALLOCATION PORTFOLIO (CLASS IB) | EQ/Value Equity Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
TARGET 2055 ALLOCATION PORTFOLIO (CLASS IB) | Multimanager Aggressive Equity Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
TARGET 2055 ALLOCATION PORTFOLIO (CLASS IB) | 1290 VT High Yield Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
TARGET 2055 ALLOCATION PORTFOLIO (CLASS IB) | EQ/Core Plus Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
TARGET 2055 ALLOCATION PORTFOLIO (CLASS IB) | EQ/American Century Mid Cap Value Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
TARGET 2055 ALLOCATION PORTFOLIO (CLASS IB) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
TARGET 2055 ALLOCATION PORTFOLIO (CLASS IB) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
TARGET 2055 ALLOCATION PORTFOLIO (CLASS IB) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 91.90%
TARGET 2055 ALLOCATION PORTFOLIO (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
TARGET 2055 ALLOCATION PORTFOLIO (CLASS K) | EQ/Equity 500 Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 41.60%
TARGET 2055 ALLOCATION PORTFOLIO (CLASS K) | EQ/International Equity Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.40%
TARGET 2055 ALLOCATION PORTFOLIO (CLASS K) | EQ/Small Company Index Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.80%
TARGET 2055 ALLOCATION PORTFOLIO (CLASS K) | EQ/MFS International Growth Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
TARGET 2055 ALLOCATION PORTFOLIO (CLASS K) | EQ/Emerging Markets Equity PLUS Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
TARGET 2055 ALLOCATION PORTFOLIO (CLASS K) | EQ/Value Equity Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
TARGET 2055 ALLOCATION PORTFOLIO (CLASS K) | Multimanager Aggressive Equity Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
TARGET 2055 ALLOCATION PORTFOLIO (CLASS K) | 1290 VT High Yield Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
TARGET 2055 ALLOCATION PORTFOLIO (CLASS K) | EQ/Core Plus Bond Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
TARGET 2055 ALLOCATION PORTFOLIO (CLASS K) | EQ/American Century Mid Cap Value Portfolio [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
TARGET 2055 ALLOCATION PORTFOLIO (CLASS K) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
TARGET 2055 ALLOCATION PORTFOLIO (CLASS K) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
TARGET 2055 ALLOCATION PORTFOLIO (CLASS K) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 91.90%
TARGET 2055 ALLOCATION PORTFOLIO (CLASS K) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
1290 VT MODERATE GROWTH ALLOCATION PORTFOLIO (CLASS IB) | Vanguard Intermediate-Term Corporate Bond ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 34.70%
1290 VT MODERATE GROWTH ALLOCATION PORTFOLIO (CLASS IB) | Vanguard S&P 500 ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.30%
1290 VT MODERATE GROWTH ALLOCATION PORTFOLIO (CLASS IB) | iShares Core MSCI EAFE ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.20%
1290 VT MODERATE GROWTH ALLOCATION PORTFOLIO (CLASS IB) | iShares Core S&P 500 ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.20%
1290 VT MODERATE GROWTH ALLOCATION PORTFOLIO (CLASS IB) | Vanguard Large-Cap ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
1290 VT MODERATE GROWTH ALLOCATION PORTFOLIO (CLASS IB) | iShares Core SP MidCap ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
1290 VT MODERATE GROWTH ALLOCATION PORTFOLIO (CLASS IB) | iShares MSCI EAFE ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
1290 VT MODERATE GROWTH ALLOCATION PORTFOLIO (CLASS IB) | iShares Russell 2000 ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
1290 VT MODERATE GROWTH ALLOCATION PORTFOLIO (CLASS IB) | iShares Core S&P Small-Cap ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
1290 VT MODERATE GROWTH ALLOCATION PORTFOLIO (CLASS IB) | JPMorgan Prime Money Market Fund, IM Shares [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
1290 VT MODERATE GROWTH ALLOCATION PORTFOLIO (CLASS IB) | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.50%
1290 VT MODERATE GROWTH ALLOCATION PORTFOLIO (CLASS IB) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 34.70%
1290 VT MODERATE GROWTH ALLOCATION PORTFOLIO (CLASS IB) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 64.80%
1290 VT MODERATE GROWTH ALLOCATION PORTFOLIO (CLASS IB) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
1290 VT MODERATE GROWTH ALLOCATION PORTFOLIO (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (3.60%)
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS IB) | iShares Convertible Bond ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.80%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS IB) | NYLI Merger Arbitrage ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.30%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS IB) | Vanguard Short-Term Inflation-Protected Securities ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS IB) | iMGP DBi Managed Futures Strategy ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.10%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS IB) | JPMorgan Equity Premium Income ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS IB) | Invesco DB Precious Metals Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS IB) | Vanguard Global ex-U.S. Real Estate ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS IB) | iShares Core U.S. REIT ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS IB) | JPMorgan Nasdaq Equity Premium Income ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS IB) | Invesco DB Energy Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS IB) | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.40%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS IB) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 29.60%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS IB) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 27.30%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS IB) | Alternatives Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 26.40%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS IB) | Commodity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.10%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS IB) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.80%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (18.20%)
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS K) | iShares Convertible Bond ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.80%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS K) | NYLI Merger Arbitrage ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.30%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS K) | Vanguard Short-Term Inflation-Protected Securities ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS K) | iMGP DBi Managed Futures Strategy ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.10%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS K) | JPMorgan Equity Premium Income ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS K) | Invesco DB Precious Metals Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS K) | Vanguard Global ex-U.S. Real Estate ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS K) | iShares Core U.S. REIT ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS K) | JPMorgan Nasdaq Equity Premium Income ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS K) | Invesco DB Energy Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS K) | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.40%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS K) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 29.60%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS K) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 27.30%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS K) | Alternatives Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 26.40%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS K) | Commodity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.10%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS K) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.80%
1290 VT MULTI-ALTERNATIVE STRATEGIES PORTFOLIO (CLASS K) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (18.20%)
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS IB) | Boeing Co. (The), 6.00% [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS IB) | Alibaba Group Holding Ltd., 0.50%, 6/1/31 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS IB) | Wells Fargo & Co., 7.50% [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS IB) | Bank of America Corp., 7.25% [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS IB) | DoorDash, Inc., 0.00%, 5/15/30 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS IB) | MicroStrategy, Inc., 0.63%, 3/15/30 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS IB) | Western Digital Corp., 3.00%, 11/15/28 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS IB) | KKR & Co., Inc., 6.25% [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS IB) | Seagate HDD Cayman, 3.50%, 6/1/28 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS IB) | GameStop Corp., 0.00%, 6/15/32 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 30.70%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.60%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.90%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.00%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (2.70%)
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS K) | Boeing Co. (The), 6.00% [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS K) | Alibaba Group Holding Ltd., 0.50%, 6/1/31 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS K) | Wells Fargo & Co., 7.50% [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS K) | Bank of America Corp., 7.25% [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS K) | DoorDash, Inc., 0.00%, 5/15/30 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS K) | MicroStrategy, Inc., 0.63%, 3/15/30 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS K) | Western Digital Corp., 3.00%, 11/15/28 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS K) | KKR & Co., Inc., 6.25% [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS K) | Seagate HDD Cayman, 3.50%, 6/1/28 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS K) | GameStop Corp., 0.00%, 6/15/32 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 30.70%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.60%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.90%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.00%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
1290 VT CONVERTIBLE SECURITIES PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (2.70%)
1290 VT DOUBLELINE OPPORTUNISTIC BOND PORTFOLIO - (CLASS IB) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
1290 VT DOUBLELINE OPPORTUNISTIC BOND PORTFOLIO - (CLASS IB) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
1290 VT DOUBLELINE OPPORTUNISTIC BOND PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
1290 VT DOUBLELINE OPPORTUNISTIC BOND PORTFOLIO - (CLASS IB) | Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.40%
1290 VT DOUBLELINE OPPORTUNISTIC BOND PORTFOLIO - (CLASS IB) | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.60%
1290 VT DOUBLELINE OPPORTUNISTIC BOND PORTFOLIO - (CLASS IB) | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.20%
1290 VT DOUBLELINE OPPORTUNISTIC BOND PORTFOLIO - (CLASS IB) | Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
1290 VT DOUBLELINE OPPORTUNISTIC BOND PORTFOLIO - (CLASS IB) | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
1290 VT DOUBLELINE OPPORTUNISTIC BOND PORTFOLIO - (CLASS IB) | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.00%
1290 VT DOUBLELINE OPPORTUNISTIC BOND PORTFOLIO - (CLASS IB) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.70%
1290 VT DOUBLELINE OPPORTUNISTIC BOND PORTFOLIO - (CLASS K) | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
1290 VT DOUBLELINE OPPORTUNISTIC BOND PORTFOLIO - (CLASS K) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
1290 VT DOUBLELINE OPPORTUNISTIC BOND PORTFOLIO - (CLASS K) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
1290 VT DOUBLELINE OPPORTUNISTIC BOND PORTFOLIO - (CLASS K) | Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.40%
1290 VT DOUBLELINE OPPORTUNISTIC BOND PORTFOLIO - (CLASS K) | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.60%
1290 VT DOUBLELINE OPPORTUNISTIC BOND PORTFOLIO - (CLASS K) | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.20%
1290 VT DOUBLELINE OPPORTUNISTIC BOND PORTFOLIO - (CLASS K) | Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
1290 VT DOUBLELINE OPPORTUNISTIC BOND PORTFOLIO - (CLASS K) | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
1290 VT DOUBLELINE OPPORTUNISTIC BOND PORTFOLIO - (CLASS K) | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.00%
1290 VT DOUBLELINE OPPORTUNISTIC BOND PORTFOLIO - (CLASS K) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.70%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS IB) | JPMorgan Chase & Co. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS IB) | Philip Morris International, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS IB) | Air Products and Chemicals, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS IB) | CVS Health Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS IB) | Medtronic plc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS IB) | Chubb Ltd. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS IB) | Smith & Nephew plc (ADR) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS IB) | Entergy Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS IB) | Merck & Co., Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS IB) | Prologis, Inc. (REIT) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.40%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.20%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.70%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.80%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.20%)
1290 VT EQUITY INCOME PORTFOLIO - (CLASS K) | JPMorgan Chase & Co. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS K) | Philip Morris International, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS K) | Air Products and Chemicals, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS K) | CVS Health Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS K) | Medtronic plc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS K) | Chubb Ltd. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS K) | Smith & Nephew plc (ADR) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS K) | Entergy Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS K) | Merck & Co., Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS K) | Prologis, Inc. (REIT) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.40%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.20%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.70%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.80%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
1290 VT EQUITY INCOME PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.20%)
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO - (CLASS IB) | National Fuel Gas Co. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO - (CLASS IB) | United States Cellular Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO - (CLASS IB) | Southwest Gas Holdings, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO - (CLASS IB) | Vulcan Materials Co. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO - (CLASS IB) | Atlanta Braves Holdings, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO - (CLASS IB) | Fox Corp., Class B [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO - (CLASS IB) | SpringWorks Therapeutics, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO - (CLASS IB) | TXNM Energy, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO - (CLASS IB) | FARO Technologies, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO - (CLASS IB) | JPMorgan Prime Money Market Fund, IM Shares [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.70%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.40%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.90%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.70%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.70%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO (CLASS K) | National Fuel Gas Co. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO (CLASS K) | United States Cellular Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO (CLASS K) | Southwest Gas Holdings, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO (CLASS K) | Vulcan Materials Co. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO (CLASS K) | Atlanta Braves Holdings, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO (CLASS K) | Fox Corp., Class B [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO (CLASS K) | SpringWorks Therapeutics, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO (CLASS K) | TXNM Energy, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO (CLASS K) | FARO Technologies, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO (CLASS K) | JPMorgan Prime Money Market Fund, IM Shares [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.70%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.40%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.90%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.70%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.70%
1290 VT GAMCO MERGERS & ACQUISITIONS PORTFOLIO (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS IB | Mueller Industries, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS IB | GATX Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS IB | Crane Co. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS IB | Republic Services, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS IB | Herc Holdings, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS IB | Modine Manufacturing Co. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS IB | Watts Water Technologies, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS IB | Rollins, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS IB | AutoNation, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS IB | Penske Automotive Group, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS IB | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS IB | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.60%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS IB | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.70%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS IB | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS IB | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS IB | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 45.90%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS IB | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS IB | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS IB | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS IB | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS IB | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS IB | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS IB | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS K) | Mueller Industries, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS K) | GATX Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS K) | Crane Co. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS K) | Republic Services, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS K) | Herc Holdings, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS K) | Modine Manufacturing Co. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS K) | Watts Water Technologies, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS K) | Rollins, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS K) | AutoNation, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS K) | Penske Automotive Group, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.60%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.70%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 45.90%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
1290 VT GAMCO SMALL COMPANY VALUE PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS IB) | Others Corporate Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS IB) | Loan Participations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS IB) | Information Technology Loan Participations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS IB) | Financials Loan Participations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS IB) | Other Loan Participations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.60%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.70%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.70%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS IB) | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS IB) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.40%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (5.30%)
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS IB) | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 80.40%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS IB) | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS K) | Others Corporate Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS K) | Loan Participations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS K) | Information Technology Loan Participations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS K) | Financials Loan Participations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS K) | Other Loan Participations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.60%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.70%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.70%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS K) | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS K) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.40%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS K) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (5.30%)
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS K) | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 80.40%
1290 VT HIGH YIELD BOND PORTFOLIO - (CLASS K) | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
1290 VT MICRO CAP PORTFOLIO - (CLASS IB) | CRA International, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
1290 VT MICRO CAP PORTFOLIO - (CLASS IB) | Grindr, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
1290 VT MICRO CAP PORTFOLIO - (CLASS IB) | Life360, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
1290 VT MICRO CAP PORTFOLIO - (CLASS IB) | Argan, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
1290 VT MICRO CAP PORTFOLIO - (CLASS IB) | Universal Technical Institute, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
1290 VT MICRO CAP PORTFOLIO - (CLASS IB) | Core Scientific, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
1290 VT MICRO CAP PORTFOLIO - (CLASS IB) | Limbach Holdings, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
1290 VT MICRO CAP PORTFOLIO - (CLASS IB) | Adaptive Biotechnologies Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
1290 VT MICRO CAP PORTFOLIO - (CLASS IB) | Mirum Pharmaceuticals, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
1290 VT MICRO CAP PORTFOLIO - (CLASS IB) | Tarsus Pharmaceuticals, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
1290 VT MICRO CAP PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.70%
1290 VT MICRO CAP PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
1290 VT MICRO CAP PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
1290 VT MICRO CAP PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.70%
1290 VT MICRO CAP PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.60%
1290 VT MICRO CAP PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.80%
1290 VT MICRO CAP PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
1290 VT MICRO CAP PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
1290 VT MICRO CAP PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
1290 VT MICRO CAP PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
1290 VT MICRO CAP PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
1290 VT MICRO CAP PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
1290 VT MICRO CAP PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (2.30%)
1290 VT MICRO CAP PORTFOLIO - (CLASS K) | CRA International, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
1290 VT MICRO CAP PORTFOLIO - (CLASS K) | Grindr, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
1290 VT MICRO CAP PORTFOLIO - (CLASS K) | Life360, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
1290 VT MICRO CAP PORTFOLIO - (CLASS K) | Argan, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
1290 VT MICRO CAP PORTFOLIO - (CLASS K) | Universal Technical Institute, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
1290 VT MICRO CAP PORTFOLIO - (CLASS K) | Core Scientific, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
1290 VT MICRO CAP PORTFOLIO - (CLASS K) | Limbach Holdings, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
1290 VT MICRO CAP PORTFOLIO - (CLASS K) | Adaptive Biotechnologies Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
1290 VT MICRO CAP PORTFOLIO - (CLASS K) | Mirum Pharmaceuticals, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
1290 VT MICRO CAP PORTFOLIO - (CLASS K) | Tarsus Pharmaceuticals, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
1290 VT MICRO CAP PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.70%
1290 VT MICRO CAP PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
1290 VT MICRO CAP PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
1290 VT MICRO CAP PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.70%
1290 VT MICRO CAP PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.60%
1290 VT MICRO CAP PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.80%
1290 VT MICRO CAP PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
1290 VT MICRO CAP PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
1290 VT MICRO CAP PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
1290 VT MICRO CAP PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
1290 VT MICRO CAP PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
1290 VT MICRO CAP PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
1290 VT MICRO CAP PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (2.30%)
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS IB) | Integrated Oil & Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 44.30%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS IB) | Oil & Gas Exploration & Production [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.90%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS IB) | Coal & Consumable Fuels [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS IB) | Diversified Metals & Mining [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.30%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS IB) | Gold [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.00%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS IB) | Steel [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS IB) | Fertilizers & Agricultural Chemicals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS IB) | Copper [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS IB) | Paper Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS IB) | Forest Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS IB) | Silver [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS IB) | Aluminum [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS IB) | Food, Beverage & Tobacco [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS IB) | Agricultural Products & Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 34.30%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 63.30%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS IB) | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 14.80%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS IB) | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS IB) | NORWAY  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS IB) | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS IB) | FINLAND  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS IB) | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS IB) | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 56.50%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS IB) | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS IB) | AUSTRALIA  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS IB) | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS IB) | Other Country Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS K) | Integrated Oil & Gas [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 44.30%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS K) | Oil & Gas Exploration & Production [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.90%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS K) | Coal & Consumable Fuels [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS K) | Diversified Metals & Mining [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.30%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS K) | Gold [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.00%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS K) | Steel [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS K) | Fertilizers & Agricultural Chemicals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS K) | Copper [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS K) | Paper Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS K) | Forest Products [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS K) | Silver [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS K) | Aluminum [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS K) | Food, Beverage & Tobacco [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS K) | Agricultural Products & Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 34.30%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 63.30%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS K) | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 14.80%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS K) | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS K) | NORWAY  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS K) | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS K) | FINLAND  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS K) | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS K) | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 56.50%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS K) | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS K) | AUSTRALIA  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS K) | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
1290 VT NATURAL RESOURCES PORTFOLIO - (CLASS K) | Other Country Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
1290 VT REAL ESTATE PORTFOLIO - (CLASS IB) | Welltower, Inc. (REIT) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
1290 VT REAL ESTATE PORTFOLIO - (CLASS IB) | Prologis, Inc. (REIT) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
1290 VT REAL ESTATE PORTFOLIO - (CLASS IB) | Equinix, Inc. (REIT) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
1290 VT REAL ESTATE PORTFOLIO - (CLASS IB) | Digital Realty Trust, Inc. (REIT) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
1290 VT REAL ESTATE PORTFOLIO - (CLASS IB) | Simon Property Group, Inc. (REIT) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
1290 VT REAL ESTATE PORTFOLIO - (CLASS IB) | Realty Income Corp. (REIT) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
1290 VT REAL ESTATE PORTFOLIO - (CLASS IB) | Public Storage (REIT) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
1290 VT REAL ESTATE PORTFOLIO - (CLASS IB) | Goodman Group (REIT) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
1290 VT REAL ESTATE PORTFOLIO - (CLASS IB) | VICI Properties, Inc. (REIT), Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
1290 VT REAL ESTATE PORTFOLIO - (CLASS IB) | Extra Space Storage, Inc. (REIT) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
1290 VT REAL ESTATE PORTFOLIO - (CLASS IB) | Retail REITs [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.20%
1290 VT REAL ESTATE PORTFOLIO - (CLASS IB) | Industrial REITs [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.00%
1290 VT REAL ESTATE PORTFOLIO - (CLASS IB) | Health Care REITs [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.20%
1290 VT REAL ESTATE PORTFOLIO - (CLASS IB) | Multi-Family Residential REITs [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
1290 VT REAL ESTATE PORTFOLIO - (CLASS IB) | Real Estate Operating Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
1290 VT REAL ESTATE PORTFOLIO - (CLASS IB) | Other Real Estate [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 40.10%
1290 VT REAL ESTATE PORTFOLIO - (CLASS IB) | Hotels, Resorts And Cruise Lines [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
1290 VT REAL ESTATE PORTFOLIO - (CLASS IB) | Internet Services And Infrastructure [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
1290 VT REAL ESTATE PORTFOLIO - (CLASS IB) | Health Care Facilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
1290 VT REAL ESTATE PORTFOLIO - (CLASS IB) | Consumer Staples Merchandise Retail [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
1290 VT REAL ESTATE PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
1290 VT REAL ESTATE PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
1290 VT REAL ESTATE PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
1290 VT REAL ESTATE PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
1290 VT REAL ESTATE PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 97.60%
1290 VT REAL ESTATE PORTFOLIO - (CLASS K) | Welltower, Inc. (REIT) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
1290 VT REAL ESTATE PORTFOLIO - (CLASS K) | Prologis, Inc. (REIT) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
1290 VT REAL ESTATE PORTFOLIO - (CLASS K) | Equinix, Inc. (REIT) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
1290 VT REAL ESTATE PORTFOLIO - (CLASS K) | Digital Realty Trust, Inc. (REIT) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
1290 VT REAL ESTATE PORTFOLIO - (CLASS K) | Simon Property Group, Inc. (REIT) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
1290 VT REAL ESTATE PORTFOLIO - (CLASS K) | Realty Income Corp. (REIT) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
1290 VT REAL ESTATE PORTFOLIO - (CLASS K) | Public Storage (REIT) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
1290 VT REAL ESTATE PORTFOLIO - (CLASS K) | Goodman Group (REIT) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
1290 VT REAL ESTATE PORTFOLIO - (CLASS K) | VICI Properties, Inc. (REIT), Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
1290 VT REAL ESTATE PORTFOLIO - (CLASS K) | Extra Space Storage, Inc. (REIT) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
1290 VT REAL ESTATE PORTFOLIO - (CLASS K) | Retail REITs [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.20%
1290 VT REAL ESTATE PORTFOLIO - (CLASS K) | Industrial REITs [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.00%
1290 VT REAL ESTATE PORTFOLIO - (CLASS K) | Health Care REITs [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.20%
1290 VT REAL ESTATE PORTFOLIO - (CLASS K) | Multi-Family Residential REITs [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
1290 VT REAL ESTATE PORTFOLIO - (CLASS K) | Real Estate Operating Companies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
1290 VT REAL ESTATE PORTFOLIO - (CLASS K) | Other Real Estate [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 40.10%
1290 VT REAL ESTATE PORTFOLIO - (CLASS K) | Hotels, Resorts And Cruise Lines [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
1290 VT REAL ESTATE PORTFOLIO - (CLASS K) | Internet Services And Infrastructure [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
1290 VT REAL ESTATE PORTFOLIO - (CLASS K) | Health Care Facilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
1290 VT REAL ESTATE PORTFOLIO - (CLASS K) | Consumer Staples Merchandise Retail [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
1290 VT REAL ESTATE PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
1290 VT REAL ESTATE PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
1290 VT REAL ESTATE PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
1290 VT REAL ESTATE PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
1290 VT REAL ESTATE PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 97.60%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS IB) | Texas Pacific Land Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.90%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS IB) | AutoNation, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS IB) | Landbridge Co. LLC, Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS IB) | Penske Automotive Group, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS IB) | Interparfums, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS IB) | Live Nation Entertainment, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS IB) | Oshkosh Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS IB) | Hawaiian Electric Industries, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS IB) | Sandstorm Gold Ltd. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS IB) | CACI International, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.20%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.30%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.70%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.30%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.30%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.70%)
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS K) | Texas Pacific Land Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.90%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS K) | AutoNation, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS K) | Landbridge Co. LLC, Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS K) | Penske Automotive Group, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS K) | Interparfums, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS K) | Live Nation Entertainment, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS K) | Oshkosh Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS K) | Hawaiian Electric Industries, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS K) | Sandstorm Gold Ltd. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS K) | CACI International, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.20%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.30%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.70%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.30%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.30%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
1290 VT SMALL CAP VALUE PORTFOLIO (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.70%)
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS IB) | Costco Wholesale Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS IB) | McDonald's Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS IB) | Mastercard, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS IB) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS IB) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS IB) | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS IB) | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS IB) | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS IB) | Alphabet, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS IB) | Visa, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.50%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.20%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.90%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.00%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.00%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.40%)
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS K) | Costco Wholesale Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS K) | McDonald's Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS K) | Mastercard, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS K) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS K) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS K) | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS K) | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS K) | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS K) | Alphabet, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS K) | Visa, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.50%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.20%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.90%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.00%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.00%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
1290 VT SMARTBETA EQUITY ESG PORTFOLIO (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.40%)
1290 VT SOCIALLY RESPONSIBLE PORTFOLIO (CLASS IB) | Alphabet, Inc., Class C [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
1290 VT SOCIALLY RESPONSIBLE PORTFOLIO (CLASS IB) | Mastercard, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
1290 VT SOCIALLY RESPONSIBLE PORTFOLIO (CLASS IB) | Procter & Gamble Co. (The) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
1290 VT SOCIALLY RESPONSIBLE PORTFOLIO (CLASS IB) | Oracle Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
1290 VT SOCIALLY RESPONSIBLE PORTFOLIO (CLASS IB) | Home Depot, Inc. (The) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
1290 VT SOCIALLY RESPONSIBLE PORTFOLIO (CLASS IB) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.50%
1290 VT SOCIALLY RESPONSIBLE PORTFOLIO (CLASS IB) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.30%
1290 VT SOCIALLY RESPONSIBLE PORTFOLIO (CLASS IB) | Tesla, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
1290 VT SOCIALLY RESPONSIBLE PORTFOLIO (CLASS IB) | Alphabet, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
1290 VT SOCIALLY RESPONSIBLE PORTFOLIO (CLASS IB) | Visa, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
1290 VT SOCIALLY RESPONSIBLE PORTFOLIO (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 40.50%
1290 VT SOCIALLY RESPONSIBLE PORTFOLIO (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
1290 VT SOCIALLY RESPONSIBLE PORTFOLIO (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
1290 VT SOCIALLY RESPONSIBLE PORTFOLIO (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
1290 VT SOCIALLY RESPONSIBLE PORTFOLIO (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.80%
1290 VT SOCIALLY RESPONSIBLE PORTFOLIO (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.70%
1290 VT SOCIALLY RESPONSIBLE PORTFOLIO (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
1290 VT SOCIALLY RESPONSIBLE PORTFOLIO (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
1290 VT SOCIALLY RESPONSIBLE PORTFOLIO (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
1290 VT SOCIALLY RESPONSIBLE PORTFOLIO (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
1290 VT SOCIALLY RESPONSIBLE PORTFOLIO (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
1290 VT SOCIALLY RESPONSIBLE PORTFOLIO (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
1290 VT SOCIALLY RESPONSIBLE PORTFOLIO (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
ATM LARGE CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | JPMorgan Prime Money Market Fund, IM Shares [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
ATM LARGE CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Berkshire Hathaway, Inc., Class B [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
ATM LARGE CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
ATM LARGE CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
ATM LARGE CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
ATM LARGE CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
ATM LARGE CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
ATM LARGE CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Broadcom, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
ATM LARGE CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Tesla, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
ATM LARGE CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Alphabet, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
ATM LARGE CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 29.80%
ATM LARGE CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.30%
ATM LARGE CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
ATM LARGE CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
ATM LARGE CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.60%
ATM LARGE CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
ATM LARGE CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
ATM LARGE CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
ATM LARGE CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
ATM LARGE CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
ATM LARGE CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
ATM LARGE CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
ATM LARGE CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
ATM MID CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.50%
ATM MID CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
ATM MID CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
ATM MID CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
ATM MID CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.40%
ATM MID CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.60%
ATM MID CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
ATM MID CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
ATM MID CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
ATM MID CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
ATM MID CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
ATM MID CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
ATM MID CAP MANAGED VOLATILITY PORTFOLIO (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
ATM SMALL CAP MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.30%
ATM SMALL CAP MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.10%
ATM SMALL CAP MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
ATM SMALL CAP MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.30%
ATM SMALL CAP MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.50%
ATM SMALL CAP MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.50%
ATM SMALL CAP MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
ATM SMALL CAP MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
ATM SMALL CAP MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
ATM SMALL CAP MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
ATM SMALL CAP MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
ATM SMALL CAP MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
ATM SMALL CAP MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
ATM INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
ATM INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
ATM INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
ATM INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
ATM INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 21.50%
ATM INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.20%
ATM INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
ATM INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
ATM INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
ATM INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
ATM INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
ATM INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
ATM INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
ATM INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 19.70%
ATM INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 10.20%
ATM INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 9.30%
ATM INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
ATM INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 8.60%
ATM INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | AUSTRALIA  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
ATM INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
ATM INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
ATM INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | SPAIN  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
ATM INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
ATM INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Other Country Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.00%
EQ/500 MANAGED VOLATILITY PORTFOLIO (CLASS IB) | JPMorgan Prime Money Market Fund, IM Shares [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/500 MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Berkshire Hathaway, Inc., Class B [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
EQ/500 MANAGED VOLATILITY PORTFOLIO (CLASS IB) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
EQ/500 MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
EQ/500 MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
EQ/500 MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
EQ/500 MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
EQ/500 MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Broadcom, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
EQ/500 MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Tesla, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
EQ/500 MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Alphabet, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
EQ/500 MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 29.90%
EQ/500 MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
EQ/500 MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
EQ/500 MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
EQ/500 MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.70%
EQ/500 MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
EQ/500 MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
EQ/500 MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
EQ/500 MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/500 MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/500 MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
EQ/500 MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/500 MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
EQ/500 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | JPMorgan Prime Money Market Fund, IM Shares [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/500 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Berkshire Hathaway, Inc., Class B [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
EQ/500 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
EQ/500 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
EQ/500 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
EQ/500 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
EQ/500 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
EQ/500 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Broadcom, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
EQ/500 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Tesla, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
EQ/500 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Alphabet, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
EQ/500 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 29.90%
EQ/500 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
EQ/500 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
EQ/500 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
EQ/500 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.70%
EQ/500 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
EQ/500 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
EQ/500 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
EQ/500 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/500 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/500 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
EQ/500 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/500 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
EQ/400 MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.60%
EQ/400 MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.00%
EQ/400 MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
EQ/400 MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
EQ/400 MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.30%
EQ/400 MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.60%
EQ/400 MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
EQ/400 MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
EQ/400 MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/400 MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
EQ/400 MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
EQ/400 MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
EQ/400 MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
EQ/400 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.60%
EQ/400 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.00%
EQ/400 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
EQ/400 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
EQ/400 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.30%
EQ/400 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.60%
EQ/400 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
EQ/400 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
EQ/400 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/400 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
EQ/400 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
EQ/400 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
EQ/400 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
EQ/2000 MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.30%
EQ/2000 MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.10%
EQ/2000 MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/2000 MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.40%
EQ/2000 MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.50%
EQ/2000 MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.50%
EQ/2000 MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/2000 MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
EQ/2000 MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/2000 MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
EQ/2000 MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
EQ/2000 MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
EQ/2000 MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/2000 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.30%
EQ/2000 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.10%
EQ/2000 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/2000 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.40%
EQ/2000 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.50%
EQ/2000 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.50%
EQ/2000 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/2000 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
EQ/2000 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/2000 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
EQ/2000 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
EQ/2000 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
EQ/2000 MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 21.40%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.10%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 19.60%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 10.20%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 9.30%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 9.10%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | AUSTRALIA  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | SPAIN  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Other Country Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.00%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 21.40%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.10%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 19.60%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 10.20%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 9.30%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 9.10%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | AUSTRALIA  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | SPAIN  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
EQ/INTERNATIONAL MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Other Country Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.00%
EQ/AB DYNAMIC AGGRESSIVE GROWTH PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.10%
EQ/AB DYNAMIC AGGRESSIVE GROWTH PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
EQ/AB DYNAMIC AGGRESSIVE GROWTH PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
EQ/AB DYNAMIC AGGRESSIVE GROWTH PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
EQ/AB DYNAMIC AGGRESSIVE GROWTH PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.50%
EQ/AB DYNAMIC AGGRESSIVE GROWTH PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.40%
EQ/AB DYNAMIC AGGRESSIVE GROWTH PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
EQ/AB DYNAMIC AGGRESSIVE GROWTH PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
EQ/AB DYNAMIC AGGRESSIVE GROWTH PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/AB DYNAMIC AGGRESSIVE GROWTH PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/AB DYNAMIC AGGRESSIVE GROWTH PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/AB DYNAMIC AGGRESSIVE GROWTH PORTFOLIO - (CLASS IB) | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
EQ/AB DYNAMIC AGGRESSIVE GROWTH PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.50%)
EQ/AB DYNAMIC AGGRESSIVE GROWTH PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.10%
EQ/AB DYNAMIC AGGRESSIVE GROWTH PORTFOLIO - (CLASS IB) | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 60.90%
EQ/AB DYNAMIC AGGRESSIVE GROWTH PORTFOLIO - (CLASS IB) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.00%
EQ/AB DYNAMIC GROWTH PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.30%
EQ/AB DYNAMIC GROWTH PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
EQ/AB DYNAMIC GROWTH PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
EQ/AB DYNAMIC GROWTH PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
EQ/AB DYNAMIC GROWTH PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.10%
EQ/AB DYNAMIC GROWTH PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
EQ/AB DYNAMIC GROWTH PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
EQ/AB DYNAMIC GROWTH PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
EQ/AB DYNAMIC GROWTH PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
EQ/AB DYNAMIC GROWTH PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/AB DYNAMIC GROWTH PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/AB DYNAMIC GROWTH PORTFOLIO - (CLASS IB) | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
EQ/AB DYNAMIC GROWTH PORTFOLIO - (CLASS IB) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/AB DYNAMIC GROWTH PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
EQ/AB DYNAMIC GROWTH PORTFOLIO - (CLASS IB) | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 64.80%
EQ/AB DYNAMIC GROWTH PORTFOLIO - (CLASS IB) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 25.90%
EQ/AB DYNAMIC GROWTH PORTFOLIO - (CLASS IB) | U.S. Government Agency Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/AB DYNAMIC MODERATE GROWTH PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.40%
EQ/AB DYNAMIC MODERATE GROWTH PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
EQ/AB DYNAMIC MODERATE GROWTH PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
EQ/AB DYNAMIC MODERATE GROWTH PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
EQ/AB DYNAMIC MODERATE GROWTH PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.30%
EQ/AB DYNAMIC MODERATE GROWTH PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
EQ/AB DYNAMIC MODERATE GROWTH PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
EQ/AB DYNAMIC MODERATE GROWTH PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
EQ/AB DYNAMIC MODERATE GROWTH PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
EQ/AB DYNAMIC MODERATE GROWTH PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/AB DYNAMIC MODERATE GROWTH PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/AB DYNAMIC MODERATE GROWTH PORTFOLIO - (CLASS IB) | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
EQ/AB DYNAMIC MODERATE GROWTH PORTFOLIO - (CLASS IB) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
EQ/AB DYNAMIC MODERATE GROWTH PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.90%)
EQ/AB DYNAMIC MODERATE GROWTH PORTFOLIO - (CLASS IB) | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 54.00%
EQ/AB DYNAMIC MODERATE GROWTH PORTFOLIO - (CLASS IB) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 36.40%
EQ/AB DYNAMIC MODERATE GROWTH PORTFOLIO - (CLASS IB) | U.S. Government Agency Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
EQ/AB SHORT DURATION GOVERNMENT BOND PORTFOLIO - (CLASS IB) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.40%
EQ/AB SHORT DURATION GOVERNMENT BOND PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
EQ/AB SHORT DURATION GOVERNMENT BOND PORTFOLIO - (CLASS IB) | Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
EQ/AB SHORT DURATION GOVERNMENT BOND PORTFOLIO - (CLASS IB) | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
EQ/AB SHORT DURATION GOVERNMENT BOND PORTFOLIO - (CLASS IB) | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
EQ/AB SHORT DURATION GOVERNMENT BOND PORTFOLIO - (CLASS IB) | Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/AB SHORT DURATION GOVERNMENT BOND PORTFOLIO - (CLASS IB) | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30%
EQ/AB SHORT DURATION GOVERNMENT BOND PORTFOLIO - (CLASS IB) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.10%
EQ/AB SHORT DURATION GOVERNMENT BOND PORTFOLIO - (CLASS IB) | U.S. Government Agency Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 33.60%
EQ/AB SHORT DURATION GOVERNMENT BOND PORTFOLIO - (CLASS IB) | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
EQ/AB SHORT DURATION GOVERNMENT BOND PORTFOLIO - (CLASS K) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.40%
EQ/AB SHORT DURATION GOVERNMENT BOND PORTFOLIO - (CLASS K) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
EQ/AB SHORT DURATION GOVERNMENT BOND PORTFOLIO - (CLASS K) | Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
EQ/AB SHORT DURATION GOVERNMENT BOND PORTFOLIO - (CLASS K) | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
EQ/AB SHORT DURATION GOVERNMENT BOND PORTFOLIO - (CLASS K) | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
EQ/AB SHORT DURATION GOVERNMENT BOND PORTFOLIO - (CLASS K) | Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/AB SHORT DURATION GOVERNMENT BOND PORTFOLIO - (CLASS K) | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30%
EQ/AB SHORT DURATION GOVERNMENT BOND PORTFOLIO - (CLASS K) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.10%
EQ/AB SHORT DURATION GOVERNMENT BOND PORTFOLIO - (CLASS K) | U.S. Government Agency Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 33.60%
EQ/AB SHORT DURATION GOVERNMENT BOND PORTFOLIO - (CLASS K) | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
EQ/AB SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.60%
EQ/AB SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.10%
EQ/AB SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/AB SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.70%
EQ/AB SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.70%
EQ/AB SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.50%
EQ/AB SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
EQ/AB SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
EQ/AB SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
EQ/AB SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/AB SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
EQ/AB SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
EQ/AB SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (2.00%)
EQ/AB SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.60%
EQ/AB SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.10%
EQ/AB SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/AB SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.70%
EQ/AB SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.70%
EQ/AB SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.50%
EQ/AB SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
EQ/AB SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
EQ/AB SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
EQ/AB SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/AB SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
EQ/AB SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
EQ/AB SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (2.00%)
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS IB) | Flex Ltd. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS IB) | Intercontinental Exchange, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS IB) | Veralto Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS IB) | AECOM [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS IB) | Salesforce, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS IB) | Rockwell Automation, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS IB) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS IB) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS IB) | Broadcom, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS IB) | Visa, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 40.80%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.40%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.80%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.50%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS K) | Flex Ltd. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS K) | Intercontinental Exchange, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS K) | Veralto Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS K) | AECOM [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS K) | Salesforce, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS K) | Rockwell Automation, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS K) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS K) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS K) | Broadcom, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS K) | Visa, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 40.80%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.40%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.80%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.50%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/AB SUSTAINABLE U.S. THEMATIC PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO - CLASS IB | Zimmer Biomet Holdings, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO - CLASS IB | Enterprise Products Partners LP [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO - CLASS IB | Henry Schein, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO - CLASS IB | US Bancorp [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO - CLASS IB | Truist Financial Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO - CLASS IB | Willis Towers Watson plc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO - CLASS IB | Northern Trust Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO - CLASS IB | Labcorp Holdings, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO - CLASS IB | Kenvue, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO - CLASS IB | MSC Industrial Direct Co., Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO - CLASS IB | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO - CLASS IB | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO - CLASS IB | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO - CLASS IB | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.40%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO - CLASS IB | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.70%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO - CLASS IB | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.40%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO - CLASS IB | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.40%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO - CLASS IB | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.10%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO - CLASS IB | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO - CLASS IB | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO - CLASS IB | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO - CLASS IB | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO - CLASS IB | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO (CLASS K) | Zimmer Biomet Holdings, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO (CLASS K) | Enterprise Products Partners LP [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO (CLASS K) | Henry Schein, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO (CLASS K) | US Bancorp [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO (CLASS K) | Truist Financial Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO (CLASS K) | Willis Towers Watson plc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO (CLASS K) | Northern Trust Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO (CLASS K) | Labcorp Holdings, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO (CLASS K) | Kenvue, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO (CLASS K) | MSC Industrial Direct Co., Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.40%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.70%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.40%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.40%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.10%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
EQ/AMERICAN CENTURY MID CAP VALUE PORTFOLIO (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
EQ/AMERICAN CENTURY MODERATE GROWTH ALLOCATION PORTFOLIO (CLASS IB) | Vanguard Intermediate-Term Corporate Bond ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 37.90%
EQ/AMERICAN CENTURY MODERATE GROWTH ALLOCATION PORTFOLIO (CLASS IB) | Vanguard S&P 500 ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.20%
EQ/AMERICAN CENTURY MODERATE GROWTH ALLOCATION PORTFOLIO (CLASS IB) | iShares Core MSCI EAFE ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.30%
EQ/AMERICAN CENTURY MODERATE GROWTH ALLOCATION PORTFOLIO (CLASS IB) | iShares Core S&P 500 ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.10%
EQ/AMERICAN CENTURY MODERATE GROWTH ALLOCATION PORTFOLIO (CLASS IB) | iShares Core SP MidCap ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/AMERICAN CENTURY MODERATE GROWTH ALLOCATION PORTFOLIO (CLASS IB) | iShares Russell 2000 ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/AMERICAN CENTURY MODERATE GROWTH ALLOCATION PORTFOLIO (CLASS IB) | JPMorgan Prime Money Market Fund, IM Shares [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
EQ/AMERICAN CENTURY MODERATE GROWTH ALLOCATION PORTFOLIO (CLASS IB) | SPDR Portfolio S&P 500 ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.20%
EQ/AMERICAN CENTURY MODERATE GROWTH ALLOCATION PORTFOLIO (CLASS IB) | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 99.60%
EQ/AMERICAN CENTURY MODERATE GROWTH ALLOCATION PORTFOLIO (CLASS IB) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 37.90%
EQ/AMERICAN CENTURY MODERATE GROWTH ALLOCATION PORTFOLIO (CLASS IB) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 61.70%
EQ/AMERICAN CENTURY MODERATE GROWTH ALLOCATION PORTFOLIO (CLASS IB) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
EQ/AMERICAN CENTURY MODERATE GROWTH ALLOCATION PORTFOLIO (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.80%)
EQ/CAPITAL GROUP RESEARCH PORTFOLIO - CLASS IB | Philip Morris International, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/CAPITAL GROUP RESEARCH PORTFOLIO - CLASS IB | Alphabet, Inc., Class C [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/CAPITAL GROUP RESEARCH PORTFOLIO - CLASS IB | Constellation Energy Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
EQ/CAPITAL GROUP RESEARCH PORTFOLIO - CLASS IB | Micron Technology, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
EQ/CAPITAL GROUP RESEARCH PORTFOLIO - CLASS IB | Royal Caribbean Cruises Ltd. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
EQ/CAPITAL GROUP RESEARCH PORTFOLIO - CLASS IB | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
EQ/CAPITAL GROUP RESEARCH PORTFOLIO - CLASS IB | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
EQ/CAPITAL GROUP RESEARCH PORTFOLIO - CLASS IB | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
EQ/CAPITAL GROUP RESEARCH PORTFOLIO - CLASS IB | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
EQ/CAPITAL GROUP RESEARCH PORTFOLIO - CLASS IB | Broadcom, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
EQ/CAPITAL GROUP RESEARCH PORTFOLIO - CLASS IB | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 26.80%
EQ/CAPITAL GROUP RESEARCH PORTFOLIO - CLASS IB | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.70%
EQ/CAPITAL GROUP RESEARCH PORTFOLIO - CLASS IB | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.00%
EQ/CAPITAL GROUP RESEARCH PORTFOLIO - CLASS IB | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.70%
EQ/CAPITAL GROUP RESEARCH PORTFOLIO - CLASS IB | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.60%
EQ/CAPITAL GROUP RESEARCH PORTFOLIO - CLASS IB | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.00%
EQ/CAPITAL GROUP RESEARCH PORTFOLIO - CLASS IB | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
EQ/CAPITAL GROUP RESEARCH PORTFOLIO - CLASS IB | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
EQ/CAPITAL GROUP RESEARCH PORTFOLIO - CLASS IB | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
EQ/CAPITAL GROUP RESEARCH PORTFOLIO - CLASS IB | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
EQ/CAPITAL GROUP RESEARCH PORTFOLIO - CLASS IB | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
EQ/CAPITAL GROUP RESEARCH PORTFOLIO - CLASS IB | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
EQ/CAPITAL GROUP RESEARCH PORTFOLIO - CLASS IB | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS IB) | Palo Alto Networks, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS IB) | Intuit, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS IB) | Eaton Corp. plc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS IB) | Netflix, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS IB) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.70%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS IB) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS IB) | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS IB) | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS IB) | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS IB) | Visa, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 39.40%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.30%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.60%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS K) | Palo Alto Networks, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS K) | Intuit, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS K) | Eaton Corp. plc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS K) | Netflix, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS K) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.70%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS K) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS K) | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS K) | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS K) | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS K) | Visa, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 39.40%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.30%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.60%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/CLEARBRIDGE LARGE CAP GROWTH ESG PORTFOLIO (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO (CLASS IB) | JPMorgan Prime Money Market Fund, IM Shares [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.70%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO (CLASS IB) | ServiceNow, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO (CLASS IB) | MercadoLibre, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Performance Food Group Co. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Casey's General Stores, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO (CLASS IB) | L3Harris Technologies, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO (CLASS IB) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.20%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.60%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.30%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO - CLASS K | JPMorgan Prime Money Market Fund, IM Shares [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.70%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO - CLASS K | ServiceNow, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO - CLASS K | MercadoLibre, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO - CLASS K | Performance Food Group Co. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO - CLASS K | Casey's General Stores, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO - CLASS K | L3Harris Technologies, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO - CLASS K | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO - CLASS K | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO - CLASS K | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO - CLASS K | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO - CLASS K | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.20%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO - CLASS K | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO - CLASS K | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO - CLASS K | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.60%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO - CLASS K | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO - CLASS K | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.30%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO - CLASS K | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO - CLASS K | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO - CLASS K | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO - CLASS K | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO - CLASS K | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO - CLASS K | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
EQ/CLEARBRIDGE SELECT EQUITY MANAGED VOLATILITY PORTFOLIO - CLASS K | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IA | Alphabet, Inc., Class C [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IA | Berkshire Hathaway, Inc., Class B [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IA | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IA | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IA | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IA | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IA | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IA | Broadcom, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IA | Tesla, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IA | Alphabet, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IA | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 30.50%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IA | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.50%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IA | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IA | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IA | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.50%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IA | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.70%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IA | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IA | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IA | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IA | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IA | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IA | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IA | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IB | Alphabet, Inc., Class C [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IB | Berkshire Hathaway, Inc., Class B [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IB | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IB | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IB | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IB | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IB | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IB | Broadcom, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IB | Tesla, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IB | Alphabet, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IB | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 30.50%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IB | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.50%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IB | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IB | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IB | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.50%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IB | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.70%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IB | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IB | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IB | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IB | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IB | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IB | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
EQ/COMMON STOCK INDEX PORTFOLIO - CLASS IB | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
EQ/CORE BOND INDEX PORTFOLIO - CLASS IB | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
EQ/CORE BOND INDEX PORTFOLIO - CLASS IB | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
EQ/CORE BOND INDEX PORTFOLIO - CLASS IB | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
EQ/CORE BOND INDEX PORTFOLIO - CLASS IB | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
EQ/CORE BOND INDEX PORTFOLIO - CLASS IB | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/CORE BOND INDEX PORTFOLIO - CLASS IB | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.10%
EQ/CORE BOND INDEX PORTFOLIO - CLASS IB | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 54.40%
EQ/CORE BOND INDEX PORTFOLIO - CLASS IB | U.S. Government Agency Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/CORE BOND INDEX PORTFOLIO - CLASS IB | Supranational [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
EQ/CORE BOND INDEX PORTFOLIO - CLASS IB | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/CORE BOND INDEX PORTFOLIO - CLASS IB | Preferred Stocks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
EQ/CORE BOND INDEX PORTFOLIO - CLASS K | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
EQ/CORE BOND INDEX PORTFOLIO - CLASS K | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
EQ/CORE BOND INDEX PORTFOLIO - CLASS K | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
EQ/CORE BOND INDEX PORTFOLIO - CLASS K | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/CORE BOND INDEX PORTFOLIO - CLASS K | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.10%
EQ/CORE BOND INDEX PORTFOLIO - CLASS K | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
EQ/CORE BOND INDEX PORTFOLIO - CLASS K | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 54.40%
EQ/CORE BOND INDEX PORTFOLIO - CLASS K | U.S. Government Agency Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/CORE BOND INDEX PORTFOLIO - CLASS K | Supranational [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
EQ/CORE BOND INDEX PORTFOLIO - CLASS K | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/CORE BOND INDEX PORTFOLIO - CLASS K | Preferred Stocks [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
EQ/CORE PLUS BOND PORTFOLIO - (CLASS IA) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/CORE PLUS BOND PORTFOLIO - (CLASS IA) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
EQ/CORE PLUS BOND PORTFOLIO - (CLASS IA) | Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 25.00%
EQ/CORE PLUS BOND PORTFOLIO - (CLASS IA) | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30%
EQ/CORE PLUS BOND PORTFOLIO - (CLASS IA) | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
EQ/CORE PLUS BOND PORTFOLIO - (CLASS IA) | Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
EQ/CORE PLUS BOND PORTFOLIO - (CLASS IA) | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.40%
EQ/CORE PLUS BOND PORTFOLIO - (CLASS IA) | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 30.30%
EQ/CORE PLUS BOND PORTFOLIO - (CLASS IA) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.20%
EQ/CORE PLUS BOND PORTFOLIO - (CLASS IB) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/CORE PLUS BOND PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
EQ/CORE PLUS BOND PORTFOLIO - (CLASS IB) | Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 25.00%
EQ/CORE PLUS BOND PORTFOLIO - (CLASS IB) | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30%
EQ/CORE PLUS BOND PORTFOLIO - (CLASS IB) | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
EQ/CORE PLUS BOND PORTFOLIO - (CLASS IB) | Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
EQ/CORE PLUS BOND PORTFOLIO - (CLASS IB) | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.40%
EQ/CORE PLUS BOND PORTFOLIO - (CLASS IB) | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 30.30%
EQ/CORE PLUS BOND PORTFOLIO - (CLASS IB) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.20%
EQ/CORE PLUS BOND PORTFOLIO - (CLASS K) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/CORE PLUS BOND PORTFOLIO - (CLASS K) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
EQ/CORE PLUS BOND PORTFOLIO - (CLASS K) | Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 25.00%
EQ/CORE PLUS BOND PORTFOLIO - (CLASS K) | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30%
EQ/CORE PLUS BOND PORTFOLIO - (CLASS K) | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
EQ/CORE PLUS BOND PORTFOLIO - (CLASS K) | Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
EQ/CORE PLUS BOND PORTFOLIO - (CLASS K) | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.40%
EQ/CORE PLUS BOND PORTFOLIO - (CLASS K) | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 30.30%
EQ/CORE PLUS BOND PORTFOLIO - (CLASS K) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.20%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 24.90%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.70%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.70%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 25.60%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS IB) | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS IB) | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS IB) | Other Country Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS IB) | SAUDI ARABIA  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS IB) | MEXICO  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS IB) | INDONESIA  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS IB) | THAILAND  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS IB) | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 14.10%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS IB) | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 27.40%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS IB) | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 21.20%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS IB) | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 10.30%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 24.90%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.70%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.70%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 25.60%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS K) | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS K) | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS K) | Other Country Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS K) | SAUDI ARABIA  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS K) | MEXICO  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS K) | INDONESIA  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS K) | THAILAND  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS K) | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 14.10%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS K) | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 27.40%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS K) | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 21.20%
EQ/EMERGING MARKETS EQUITY PLUS PORTFOLIO - (CLASS K) | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 10.30%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IA) | Alphabet, Inc., Class C [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IA) | Berkshire Hathaway, Inc., Class B [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IA) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IA) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IA) | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IA) | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IA) | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IA) | Broadcom, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IA) | Tesla, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IA) | Alphabet, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IA) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.80%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IA) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.30%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IA) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.70%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IA) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IA) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.90%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IA) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IA) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IA) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IA) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IA) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IA) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IA) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IA) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IB) | Alphabet, Inc., Class C [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IB) | Berkshire Hathaway, Inc., Class B [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IB) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IB) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IB) | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IB) | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IB) | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IB) | Broadcom, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IB) | Tesla, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IB) | Alphabet, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.80%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.30%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.70%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.90%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS K) | Alphabet, Inc., Class C [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS K) | Berkshire Hathaway, Inc., Class B [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS K) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS K) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS K) | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS K) | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS K) | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS K) | Broadcom, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS K) | Tesla, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS K) | Alphabet, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.80%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.30%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.70%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.90%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/EQUITY 500 INDEX PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
EQ/FIDELITY INSTITUTIONAL AM LARGE CAP PORTFOLIO - (CLASS IB) | Alphabet, Inc., Class C [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
EQ/FIDELITY INSTITUTIONAL AM LARGE CAP PORTFOLIO - (CLASS IB) | Exxon Mobil Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
EQ/FIDELITY INSTITUTIONAL AM LARGE CAP PORTFOLIO - (CLASS IB) | Netflix, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
EQ/FIDELITY INSTITUTIONAL AM LARGE CAP PORTFOLIO - (CLASS IB) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
EQ/FIDELITY INSTITUTIONAL AM LARGE CAP PORTFOLIO - (CLASS IB) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
EQ/FIDELITY INSTITUTIONAL AM LARGE CAP PORTFOLIO - (CLASS IB) | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.90%
EQ/FIDELITY INSTITUTIONAL AM LARGE CAP PORTFOLIO - (CLASS IB) | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
EQ/FIDELITY INSTITUTIONAL AM LARGE CAP PORTFOLIO - (CLASS IB) | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/FIDELITY INSTITUTIONAL AM LARGE CAP PORTFOLIO - (CLASS IB) | Broadcom, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/FIDELITY INSTITUTIONAL AM LARGE CAP PORTFOLIO - (CLASS IB) | Tesla, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/FIDELITY INSTITUTIONAL AM LARGE CAP PORTFOLIO - (CLASS IB) | Exchange Traded Funds Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/FIDELITY INSTITUTIONAL AM LARGE CAP PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.70%
EQ/FIDELITY INSTITUTIONAL AM LARGE CAP PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.20%
EQ/FIDELITY INSTITUTIONAL AM LARGE CAP PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.60%
EQ/FIDELITY INSTITUTIONAL AM LARGE CAP PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
EQ/FIDELITY INSTITUTIONAL AM LARGE CAP PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
EQ/FIDELITY INSTITUTIONAL AM LARGE CAP PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.70%
EQ/FIDELITY INSTITUTIONAL AM LARGE CAP PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
EQ/FIDELITY INSTITUTIONAL AM LARGE CAP PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/FIDELITY INSTITUTIONAL AM LARGE CAP PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
EQ/FIDELITY INSTITUTIONAL AM LARGE CAP PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/FIDELITY INSTITUTIONAL AM LARGE CAP PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/FIDELITY INSTITUTIONAL AM LARGE CAP PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/FIDELITY INSTITUTIONAL AM LARGE CAP PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
EQ/FIDELITY INSTITUTIONAL AM® LARGE CAP PORTFOLIO - (CLASS K) | Alphabet, Inc., Class C [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
EQ/FIDELITY INSTITUTIONAL AM® LARGE CAP PORTFOLIO - (CLASS K) | Exxon Mobil Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
EQ/FIDELITY INSTITUTIONAL AM® LARGE CAP PORTFOLIO - (CLASS K) | Netflix, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
EQ/FIDELITY INSTITUTIONAL AM® LARGE CAP PORTFOLIO - (CLASS K) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
EQ/FIDELITY INSTITUTIONAL AM® LARGE CAP PORTFOLIO - (CLASS K) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
EQ/FIDELITY INSTITUTIONAL AM® LARGE CAP PORTFOLIO - (CLASS K) | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.90%
EQ/FIDELITY INSTITUTIONAL AM® LARGE CAP PORTFOLIO - (CLASS K) | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
EQ/FIDELITY INSTITUTIONAL AM® LARGE CAP PORTFOLIO - (CLASS K) | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/FIDELITY INSTITUTIONAL AM® LARGE CAP PORTFOLIO - (CLASS K) | Broadcom, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/FIDELITY INSTITUTIONAL AM® LARGE CAP PORTFOLIO - (CLASS K) | Tesla, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/FIDELITY INSTITUTIONAL AM® LARGE CAP PORTFOLIO - (CLASS K) | Exchange Traded Funds Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/FIDELITY INSTITUTIONAL AM® LARGE CAP PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.70%
EQ/FIDELITY INSTITUTIONAL AM® LARGE CAP PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.20%
EQ/FIDELITY INSTITUTIONAL AM® LARGE CAP PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.60%
EQ/FIDELITY INSTITUTIONAL AM® LARGE CAP PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
EQ/FIDELITY INSTITUTIONAL AM® LARGE CAP PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
EQ/FIDELITY INSTITUTIONAL AM® LARGE CAP PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.70%
EQ/FIDELITY INSTITUTIONAL AM® LARGE CAP PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
EQ/FIDELITY INSTITUTIONAL AM® LARGE CAP PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/FIDELITY INSTITUTIONAL AM® LARGE CAP PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
EQ/FIDELITY INSTITUTIONAL AM® LARGE CAP PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/FIDELITY INSTITUTIONAL AM® LARGE CAP PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/FIDELITY INSTITUTIONAL AM® LARGE CAP PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/FIDELITY INSTITUTIONAL AM® LARGE CAP PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
EQ/FRANKLIN MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
EQ/FRANKLIN MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/FRANKLIN MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
EQ/FRANKLIN MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/FRANKLIN MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/FRANKLIN MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/FRANKLIN MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
EQ/FRANKLIN MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
EQ/FRANKLIN MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
EQ/FRANKLIN MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
EQ/FRANKLIN MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
EQ/FRANKLIN MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.60%
EQ/FRANKLIN MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
EQ/FRANKLIN MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
EQ/FRANKLIN MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.60%
EQ/FRANKLIN MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 43.40%
EQ/FRANKLIN RISING DIVIDENDS PORTFOLIO - (CLASS IB) | JPMorgan Chase & Co. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
EQ/FRANKLIN RISING DIVIDENDS PORTFOLIO - (CLASS IB) | Oracle Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/FRANKLIN RISING DIVIDENDS PORTFOLIO - (CLASS IB) | Linde plc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/FRANKLIN RISING DIVIDENDS PORTFOLIO - (CLASS IB) | Stryker Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
EQ/FRANKLIN RISING DIVIDENDS PORTFOLIO - (CLASS IB) | Texas Instruments, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
EQ/FRANKLIN RISING DIVIDENDS PORTFOLIO - (CLASS IB) | Walmart, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
EQ/FRANKLIN RISING DIVIDENDS PORTFOLIO - (CLASS IB) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.80%
EQ/FRANKLIN RISING DIVIDENDS PORTFOLIO - (CLASS IB) | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/FRANKLIN RISING DIVIDENDS PORTFOLIO - (CLASS IB) | Broadcom, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
EQ/FRANKLIN RISING DIVIDENDS PORTFOLIO - (CLASS IB) | Visa, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
EQ/FRANKLIN RISING DIVIDENDS PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 30.40%
EQ/FRANKLIN RISING DIVIDENDS PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
EQ/FRANKLIN RISING DIVIDENDS PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.20%
EQ/FRANKLIN RISING DIVIDENDS PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.50%
EQ/FRANKLIN RISING DIVIDENDS PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.50%
EQ/FRANKLIN RISING DIVIDENDS PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
EQ/FRANKLIN RISING DIVIDENDS PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
EQ/FRANKLIN RISING DIVIDENDS PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
EQ/FRANKLIN RISING DIVIDENDS PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/FRANKLIN RISING DIVIDENDS PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
EQ/FRANKLIN RISING DIVIDENDS PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
EQ/FRANKLIN SMALL CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.00%
EQ/FRANKLIN SMALL CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.00%
EQ/FRANKLIN SMALL CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
EQ/FRANKLIN SMALL CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
EQ/FRANKLIN SMALL CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 24.10%
EQ/FRANKLIN SMALL CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.80%
EQ/FRANKLIN SMALL CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
EQ/FRANKLIN SMALL CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/FRANKLIN SMALL CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/FRANKLIN SMALL CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
EQ/FRANKLIN SMALL CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
EQ/FRANKLIN SMALL CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.40%
EQ/FRANKLIN SMALL CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/FRANKLIN SMALL CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.00%
EQ/FRANKLIN SMALL CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.00%
EQ/FRANKLIN SMALL CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
EQ/FRANKLIN SMALL CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
EQ/FRANKLIN SMALL CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 24.10%
EQ/FRANKLIN SMALL CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.80%
EQ/FRANKLIN SMALL CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
EQ/FRANKLIN SMALL CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/FRANKLIN SMALL CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/FRANKLIN SMALL CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
EQ/FRANKLIN SMALL CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
EQ/FRANKLIN SMALL CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.40%
EQ/FRANKLIN SMALL CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.10%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.60%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.20%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.60%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.00%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 38.80%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | AUSTRALIA  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Other Country Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.10%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.60%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.20%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.60%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.00%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS K) | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS K) | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS K) | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS K) | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 38.80%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS K) | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS K) | AUSTRALIA  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS K) | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Other Country Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS K) | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS K) | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
EQ/GLOBAL EQUITY MANAGED VOLATILITY PORTFOLIO - (CLASS K) | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
EQ/GOLDMAN SACHS GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 62.10%
EQ/GOLDMAN SACHS GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Fixed Income Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 30.00%
EQ/GOLDMAN SACHS GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.10%
EQ/GOLDMAN SACHS GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 41.70%
EQ/GOLDMAN SACHS GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (3.80%)
EQ/GOLDMAN SACHS MID CAP VALUE PORTFOLIO - (CLASS IB) | AMETEK, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/GOLDMAN SACHS MID CAP VALUE PORTFOLIO - (CLASS IB) | Rockwell Automation, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/GOLDMAN SACHS MID CAP VALUE PORTFOLIO - (CLASS IB) | Coca-Cola Europacific Partners plc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
EQ/GOLDMAN SACHS MID CAP VALUE PORTFOLIO - (CLASS IB) | BJ's Wholesale Club Holdings, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/GOLDMAN SACHS MID CAP VALUE PORTFOLIO - (CLASS IB) | Fidelity National Information Services, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/GOLDMAN SACHS MID CAP VALUE PORTFOLIO - (CLASS IB) | DR Horton, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/GOLDMAN SACHS MID CAP VALUE PORTFOLIO - (CLASS IB) | Martin Marietta Materials, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
EQ/GOLDMAN SACHS MID CAP VALUE PORTFOLIO - (CLASS IB) | Raymond James Financial, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/GOLDMAN SACHS MID CAP VALUE PORTFOLIO - (CLASS IB) | Dynatrace, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/GOLDMAN SACHS MID CAP VALUE PORTFOLIO - (CLASS IB) | Phillips 66 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/GOLDMAN SACHS MID CAP VALUE PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
EQ/GOLDMAN SACHS MID CAP VALUE PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
EQ/GOLDMAN SACHS MID CAP VALUE PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/GOLDMAN SACHS MID CAP VALUE PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
EQ/GOLDMAN SACHS MID CAP VALUE PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.30%
EQ/GOLDMAN SACHS MID CAP VALUE PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.70%
EQ/GOLDMAN SACHS MID CAP VALUE PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
EQ/GOLDMAN SACHS MID CAP VALUE PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30%
EQ/GOLDMAN SACHS MID CAP VALUE PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
EQ/GOLDMAN SACHS MID CAP VALUE PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.90%
EQ/GOLDMAN SACHS MID CAP VALUE PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.60%
EQ/GOLDMAN SACHS MID CAP VALUE PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
EQ/GOLDMAN SACHS MID CAP VALUE PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/GOLDMAN SACHS MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.00%
EQ/GOLDMAN SACHS MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/GOLDMAN SACHS MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/GOLDMAN SACHS MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
EQ/GOLDMAN SACHS MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
EQ/GOLDMAN SACHS MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/GOLDMAN SACHS MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/GOLDMAN SACHS MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
EQ/GOLDMAN SACHS MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
EQ/GOLDMAN SACHS MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
EQ/GOLDMAN SACHS MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
EQ/GOLDMAN SACHS MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.80%
EQ/GOLDMAN SACHS MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
EQ/GOLDMAN SACHS MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 30.00%
EQ/GOLDMAN SACHS MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 41.30%
EQ/GOLDMAN SACHS MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Rights [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
EQ/INTERMEDIATE CORPORATE BOND PORTFOLIO - (CLASS IB) | Government Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
EQ/INTERMEDIATE CORPORATE BOND PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
EQ/INTERMEDIATE CORPORATE BOND PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
EQ/INTERMEDIATE CORPORATE BOND PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
EQ/INTERMEDIATE CORPORATE BOND PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
EQ/INTERMEDIATE CORPORATE BOND PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.10%
EQ/INTERMEDIATE CORPORATE BOND PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
EQ/INTERMEDIATE CORPORATE BOND PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
EQ/INTERMEDIATE CORPORATE BOND PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
EQ/INTERMEDIATE CORPORATE BOND PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.70%
EQ/INTERMEDIATE CORPORATE BOND PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
EQ/INTERMEDIATE CORPORATE BOND PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
EQ/INTERMEDIATE CORPORATE BOND PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
EQ/INTERMEDIATE CORPORATE BOND PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/INTERMEDIATE CORPORATE BOND PORTFOLIO - (CLASS K) | Government Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
EQ/INTERMEDIATE CORPORATE BOND PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
EQ/INTERMEDIATE CORPORATE BOND PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
EQ/INTERMEDIATE CORPORATE BOND PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
EQ/INTERMEDIATE CORPORATE BOND PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
EQ/INTERMEDIATE CORPORATE BOND PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.10%
EQ/INTERMEDIATE CORPORATE BOND PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
EQ/INTERMEDIATE CORPORATE BOND PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
EQ/INTERMEDIATE CORPORATE BOND PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
EQ/INTERMEDIATE CORPORATE BOND PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.70%
EQ/INTERMEDIATE CORPORATE BOND PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
EQ/INTERMEDIATE CORPORATE BOND PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
EQ/INTERMEDIATE CORPORATE BOND PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
EQ/INTERMEDIATE CORPORATE BOND PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/INTERMEDIATE GOVERNMENT BOND PORTFOLIO - (CLASS IA) | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
EQ/INTERMEDIATE GOVERNMENT BOND PORTFOLIO - (CLASS IA) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
EQ/INTERMEDIATE GOVERNMENT BOND PORTFOLIO - (CLASS IA) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
EQ/INTERMEDIATE GOVERNMENT BOND PORTFOLIO - (CLASS IA) | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
EQ/INTERMEDIATE GOVERNMENT BOND PORTFOLIO - (CLASS IA) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 39.70%
EQ/INTERMEDIATE GOVERNMENT BOND PORTFOLIO - (CLASS IA) | U.S. Government Agency Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 52.10%
EQ/INTERMEDIATE GOVERNMENT BOND PORTFOLIO - (CLASS IB) | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
EQ/INTERMEDIATE GOVERNMENT BOND PORTFOLIO - (CLASS IB) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
EQ/INTERMEDIATE GOVERNMENT BOND PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
EQ/INTERMEDIATE GOVERNMENT BOND PORTFOLIO - (CLASS IB) | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
EQ/INTERMEDIATE GOVERNMENT BOND PORTFOLIO - (CLASS IB) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 39.70%
EQ/INTERMEDIATE GOVERNMENT BOND PORTFOLIO - (CLASS IB) | U.S. Government Agency Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 52.10%
EQ/INTERMEDIATE GOVERNMENT BOND PORTFOLIO - (CLASS K) | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
EQ/INTERMEDIATE GOVERNMENT BOND PORTFOLIO - (CLASS K) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
EQ/INTERMEDIATE GOVERNMENT BOND PORTFOLIO - (CLASS K) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
EQ/INTERMEDIATE GOVERNMENT BOND PORTFOLIO - (CLASS K) | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
EQ/INTERMEDIATE GOVERNMENT BOND PORTFOLIO - (CLASS K) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 39.70%
EQ/INTERMEDIATE GOVERNMENT BOND PORTFOLIO - (CLASS K) | U.S. Government Agency Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 52.10%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Exchange Traded Funds Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.10%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.40%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.70%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 14.70%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 10.00%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | AUSTRALIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | SPAIN  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Other Country Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.20%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Exchange Traded Funds Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.10%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.40%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.70%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 14.70%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 10.00%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | AUSTRALIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | SPAIN  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
EQ/INTERNATIONAL CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Other Country Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.20%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IA) | Other Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IA) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IA) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.40%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IA) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IA) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.40%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IA) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.30%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IA) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.40%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IA) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IA) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IA) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IA) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IA) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IA) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IA) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IA) | FINLAND  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IA) | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 24.60%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IA) | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 18.70%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IA) | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 11.90%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IA) | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IA) | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 11.80%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IA) | AUSTRALIA  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IA) | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IA) | SPAIN  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IA) | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IA) | Other Country Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IB) | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.40%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.40%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.30%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.40%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IB) | FINLAND  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IB) | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 24.60%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IB) | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 18.70%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IB) | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 11.90%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IB) | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IB) | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 11.80%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IB) | AUSTRALIA  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IB) | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IB) | SPAIN  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IB) | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS IB) | Other Country Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS K) | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.40%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.40%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.30%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.40%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS K) | FINLAND  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS K) | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 24.60%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS K) | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 18.70%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS K) | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 11.90%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS K) | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS K) | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 11.80%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS K) | AUSTRALIA  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS K) | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS K) | SPAIN  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS K) | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
EQ/INTERNATIONAL EQUITY INDEX PORTFOLIO - (CLASS K) | Other Country Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Mutual Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.30%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.20%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.40%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.30%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.50%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 16.20%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 15.10%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 14.00%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 12.90%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | AUSTRALIA  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | SPAIN  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Other Country Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Mutual Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.30%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.20%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.40%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.30%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.50%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 16.20%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 15.10%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 14.00%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 12.90%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | AUSTRALIA  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | SPAIN  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Other Country Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
EQ/INTERNATIONAL VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS IB) | Philip Morris International, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS IB) | CVS Health Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS IB) | Bank of America Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS IB) | Wells Fargo & Co. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS IB) | Cisco Systems, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS IB) | State Street Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS IB) | Johnson Controls International plc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS IB) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS IB) | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS IB) | Alphabet, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.80%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.20%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.60%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.90%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.90%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.50%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS K) | Philip Morris International, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS K) | CVS Health Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS K) | Bank of America Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS K) | Wells Fargo & Co. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS K) | Cisco Systems, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS K) | State Street Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS K) | Johnson Controls International plc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS K) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS K) | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS K) | Alphabet, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.80%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.20%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.60%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.90%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.90%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.50%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/INVESCO COMSTOCK PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/INVESCO GLOBAL PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.70%
EQ/INVESCO GLOBAL PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.80%
EQ/INVESCO GLOBAL PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.90%
EQ/INVESCO GLOBAL PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.90%
EQ/INVESCO GLOBAL PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
EQ/INVESCO GLOBAL PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
EQ/INVESCO GLOBAL PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
EQ/INVESCO GLOBAL PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
EQ/INVESCO GLOBAL PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
EQ/INVESCO GLOBAL PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
EQ/INVESCO GLOBAL PORTFOLIO - (CLASS IB) | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
EQ/INVESCO GLOBAL PORTFOLIO - (CLASS IB) | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/INVESCO GLOBAL PORTFOLIO - (CLASS IB) | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
EQ/INVESCO GLOBAL PORTFOLIO - (CLASS IB) | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 62.90%
EQ/INVESCO GLOBAL PORTFOLIO - (CLASS IB) | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
EQ/INVESCO GLOBAL PORTFOLIO - (CLASS IB) | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/INVESCO GLOBAL PORTFOLIO - (CLASS IB) | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/INVESCO GLOBAL PORTFOLIO - (CLASS IB) | Other Country Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
EQ/INVESCO GLOBAL PORTFOLIO - (CLASS IB) | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
EQ/INVESCO GLOBAL PORTFOLIO - (CLASS IB) | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/INVESCO GLOBAL PORTFOLIO - (CLASS IB) | SWEDEN  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/INVESCO GLOBAL REAL ASSETS PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
EQ/INVESCO GLOBAL REAL ASSETS PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
EQ/INVESCO GLOBAL REAL ASSETS PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
EQ/INVESCO GLOBAL REAL ASSETS PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 44.60%
EQ/INVESCO GLOBAL REAL ASSETS PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
EQ/INVESCO GLOBAL REAL ASSETS PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.20%
EQ/INVESCO GLOBAL REAL ASSETS PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 24.80%
EQ/INVESCO GLOBAL REAL ASSETS PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
EQ/INVESCO GLOBAL REAL ASSETS PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (2.10%)
EQ/INVESCO GLOBAL REAL ASSETS PORTFOLIO - (CLASS IB) | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 11.70%
EQ/INVESCO GLOBAL REAL ASSETS PORTFOLIO - (CLASS IB) | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
EQ/INVESCO GLOBAL REAL ASSETS PORTFOLIO - (CLASS IB) | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
EQ/INVESCO GLOBAL REAL ASSETS PORTFOLIO - (CLASS IB) | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
EQ/INVESCO GLOBAL REAL ASSETS PORTFOLIO - (CLASS IB) | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 59.40%
EQ/INVESCO GLOBAL REAL ASSETS PORTFOLIO - (CLASS IB) | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 6.70%
EQ/INVESCO GLOBAL REAL ASSETS PORTFOLIO - (CLASS IB) | AUSTRALIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
EQ/INVESCO GLOBAL REAL ASSETS PORTFOLIO - (CLASS IB) | SPAIN  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/INVESCO GLOBAL REAL ASSETS PORTFOLIO - (CLASS IB) | Other Country Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
EQ/INVESCO GLOBAL REAL ASSETS PORTFOLIO - (CLASS IB) | SINGAPORE  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
EQ/INVESCO GLOBAL REAL ASSETS PORTFOLIO - (CLASS IB) | HONG KONG  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
EQ/INVESCO MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.00%
EQ/INVESCO MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
EQ/INVESCO MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
EQ/INVESCO MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/INVESCO MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
EQ/INVESCO MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
EQ/INVESCO MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
EQ/INVESCO MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
EQ/INVESCO MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
EQ/INVESCO MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
EQ/INVESCO MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
EQ/INVESCO MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.50%
EQ/INVESCO MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
EQ/INVESCO MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 33.20%
EQ/INVESCO MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 48.60%
EQ/INVESCO MODERATE ALLOCATION PORTFOLIO - (CLASS IB) | Rights [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
EQ/INVESCO MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Other Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
EQ/INVESCO MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.40%
EQ/INVESCO MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Information Technology Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
EQ/INVESCO MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Financials Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
EQ/INVESCO MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Health Care Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
EQ/INVESCO MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
EQ/INVESCO MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
EQ/INVESCO MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
EQ/INVESCO MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
EQ/INVESCO MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.30%
EQ/INVESCO MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/INVESCO MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/INVESCO MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.60%
EQ/INVESCO MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
EQ/INVESCO MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 37.80%
EQ/INVESCO MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 37.70%
EQ/INVESCO MODERATE GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Rights [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS IB) | Flex Ltd. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS IB) | Constellation Software, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS IB) | Intact Financial Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS IB) | SS&C Technologies Holdings, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS IB) | Ferguson Enterprises, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS IB) | AppLovin Corp., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS IB) | Boston Scientific Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS IB) | LPL Financial Holdings, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS IB) | Liberty Media Corp.-Liberty Formula One, Class C [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS IB) | Revvity, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 26.00%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.70%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.80%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 25.70%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS K) | Flex Ltd. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS K) | Constellation Software, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS K) | Intact Financial Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS K) | SS&C Technologies Holdings, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS K) | Ferguson Enterprises, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS K) | AppLovin Corp., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS K) | Boston Scientific Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS K) | LPL Financial Holdings, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS K) | Liberty Media Corp.-Liberty Formula One, Class C [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS K) | Revvity, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 26.00%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.70%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.80%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 25.70%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
EQ/JANUS ENTERPRISE PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
EQ/JPMORGAN GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 50.10%
EQ/JPMORGAN GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Equity Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 50.10%
EQ/JPMORGAN GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.90%
EQ/JPMORGAN GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (8.00%)
EQ/JPMORGAN GROWTH ALLOCATION PORTFOLIO - (CLASS IB) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 38.00%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS IB) | Alphabet, Inc., Class C [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS IB) | Mastercard, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS IB) | Netflix, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS IB) | Invesco QQQ Trust [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS IB) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS IB) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.40%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS IB) | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS IB) | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS IB) | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS IB) | Broadcom, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS IB) | Exchange Traded Funds Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 36.40%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.00%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.50%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.40%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.70%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS K) | Alphabet, Inc., Class C [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS K) | Mastercard, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS K) | Netflix, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS K) | Invesco QQQ Trust [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS K) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS K) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.40%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS K) | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS K) | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS K) | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS K) | Broadcom, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS K) | Exchange Traded Funds Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 36.40%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.00%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.50%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.40%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.70%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
EQ/JPMORGAN GROWTH STOCK PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS IB) | Philip Morris International, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS IB) | Equinix, Inc. (REIT) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS IB) | Bank of America Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS IB) | Wells Fargo & Co. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS IB) | Western Digital Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS IB) | Emerson Electric Co. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS IB) | Cigna Group (The) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS IB) | Seagate Technology Holdings plc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS IB) | First Citizens BancShares, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS IB) | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.20%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.40%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.90%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.40%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS K) | Philip Morris International, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS K) | Equinix, Inc. (REIT) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS K) | Bank of America Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS K) | Wells Fargo & Co. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS K) | Western Digital Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS K) | Emerson Electric Co. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS K) | Cigna Group (The) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS K) | Seagate Technology Holdings plc [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS K) | First Citizens BancShares, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS K) | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.20%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.40%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.90%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.40%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
EQ/JPMORGAN VALUE OPPORTUNITIES PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | iShares Core S&P 500 ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | JPMorgan Prime Money Market Fund, IM Shares [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | iShares Russell 1000 ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | iShares Morningstar U.S. Equity ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Broadcom, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Exchange Traded Funds Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.40%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.60%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.70%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.00%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | iShares Core S&P 500 ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | JPMorgan Prime Money Market Fund, IM Shares [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | iShares Russell 1000 ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | iShares Morningstar U.S. Equity ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Broadcom, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Exchange Traded Funds Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.40%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.60%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.70%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.00%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
EQ/LARGE CAP CORE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS IB) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.40%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS IB) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.40%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS IB) | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.20%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS IB) | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS IB) | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS IB) | Broadcom, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS IB) | Tesla, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS IB) | Alphabet, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS IB) | Eli Lilly And Co [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS IB) | Visa, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 50.70%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.40%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.40%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS K) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.40%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS K) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.40%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS K) | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.20%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS K) | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS K) | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS K) | Broadcom, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS K) | Tesla, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS K) | Alphabet, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS K) | Eli Lilly And Co [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS K) | Visa, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 50.70%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.40%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.40%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/LARGE CAP GROWTH INDEX PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | JPMorgan Prime Money Market Fund, IM Shares [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Vanguard Russell 1000 Growth ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.70%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | iShares Morningstar Growth ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | SPDR Portfolio S&P 500 Growth ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Vanguard Growth ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Exchange Traded Funds Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.70%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.50%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.00%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.80%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO (CLASS K) | JPMorgan Prime Money Market Fund, IM Shares [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO (CLASS K) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO (CLASS K) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO (CLASS K) | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO (CLASS K) | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO (CLASS K) | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO (CLASS K) | Vanguard Russell 1000 Growth ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.70%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO (CLASS K) | iShares Morningstar Growth ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO (CLASS K) | SPDR Portfolio S&P 500 Growth ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO (CLASS K) | Vanguard Growth ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO (CLASS K) | Exchange Traded Funds Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.70%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.50%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.00%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.80%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
EQ/LARGE CAP GROWTH MANAGED VOLATILITY PORTFOLIO (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS IB) | JPMorgan Chase & Co. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS IB) | Alphabet, Inc., Class C [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS IB) | Procter & Gamble Co. (The) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS IB) | Berkshire Hathaway, Inc., Class B [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS IB) | Exxon Mobil Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS IB) | Walmart, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS IB) | Bank of America Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS IB) | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS IB) | Alphabet, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS IB) | Johnson & Johnson [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.50%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.60%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.60%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.00%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS K) | JPMorgan Chase & Co. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS K) | Alphabet, Inc., Class C [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS K) | Procter & Gamble Co. (The) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS K) | Berkshire Hathaway, Inc., Class B [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS K) | Exxon Mobil Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS K) | Walmart, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS K) | Bank of America Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS K) | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS K) | Alphabet, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS K) | Johnson & Johnson [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.50%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.60%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.60%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.00%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
EQ/LARGE CAP VALUE INDEX PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
EQ/LARGE CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Exchange Traded Funds Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
EQ/LARGE CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.40%
EQ/LARGE CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
EQ/LARGE CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
EQ/LARGE CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
EQ/LARGE CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.60%
EQ/LARGE CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.20%
EQ/LARGE CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
EQ/LARGE CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
EQ/LARGE CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
EQ/LARGE CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
EQ/LARGE CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
EQ/LARGE CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/LARGE CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
EQ/LARGE CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Exchange Traded Funds Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
EQ/LARGE CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.40%
EQ/LARGE CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
EQ/LARGE CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
EQ/LARGE CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
EQ/LARGE CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.60%
EQ/LARGE CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.20%
EQ/LARGE CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
EQ/LARGE CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
EQ/LARGE CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
EQ/LARGE CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
EQ/LARGE CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
EQ/LARGE CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/LARGE CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
EQ/LAZARD EMERGING MARKETS EQUITY PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.10%
EQ/LAZARD EMERGING MARKETS EQUITY PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
EQ/LAZARD EMERGING MARKETS EQUITY PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.70%
EQ/LAZARD EMERGING MARKETS EQUITY PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
EQ/LAZARD EMERGING MARKETS EQUITY PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 27.40%
EQ/LAZARD EMERGING MARKETS EQUITY PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
EQ/LAZARD EMERGING MARKETS EQUITY PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
EQ/LAZARD EMERGING MARKETS EQUITY PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/LAZARD EMERGING MARKETS EQUITY PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.90%
EQ/LAZARD EMERGING MARKETS EQUITY PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
EQ/LAZARD EMERGING MARKETS EQUITY PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
EQ/LAZARD EMERGING MARKETS EQUITY PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
EQ/LAZARD EMERGING MARKETS EQUITY PORTFOLIO - (CLASS IB) | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 12.00%
EQ/LAZARD EMERGING MARKETS EQUITY PORTFOLIO - (CLASS IB) | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
EQ/LAZARD EMERGING MARKETS EQUITY PORTFOLIO - (CLASS IB) | Other Country Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
EQ/LAZARD EMERGING MARKETS EQUITY PORTFOLIO - (CLASS IB) | MEXICO  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
EQ/LAZARD EMERGING MARKETS EQUITY PORTFOLIO - (CLASS IB) | INDONESIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
EQ/LAZARD EMERGING MARKETS EQUITY PORTFOLIO - (CLASS IB) | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
EQ/LAZARD EMERGING MARKETS EQUITY PORTFOLIO - (CLASS IB) | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 23.50%
EQ/LAZARD EMERGING MARKETS EQUITY PORTFOLIO - (CLASS IB) | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 13.90%
EQ/LAZARD EMERGING MARKETS EQUITY PORTFOLIO - (CLASS IB) | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 12.00%
EQ/LAZARD EMERGING MARKETS EQUITY PORTFOLIO - (CLASS IB) | HUNGARY  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/LAZARD EMERGING MARKETS EQUITY PORTFOLIO - (CLASS IB) | GREECE  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/LONG-TERM BOND PORTFOLIO - (CLASS IB) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
EQ/LONG-TERM BOND PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
EQ/LONG-TERM BOND PORTFOLIO - (CLASS IB) | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
EQ/LONG-TERM BOND PORTFOLIO - (CLASS IB) | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 43.70%
EQ/LONG-TERM BOND PORTFOLIO - (CLASS IB) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 49.90%
EQ/LONG-TERM BOND PORTFOLIO - (CLASS IB) | U.S. Government Agency Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
EQ/LONG-TERM BOND PORTFOLIO - (CLASS IB) | Supranational [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/LONG-TERM BOND PORTFOLIO - (CLASS IB) | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/LONG-TERM BOND PORTFOLIO - (CLASS K) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
EQ/LONG-TERM BOND PORTFOLIO - (CLASS K) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
EQ/LONG-TERM BOND PORTFOLIO - (CLASS K) | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
EQ/LONG-TERM BOND PORTFOLIO - (CLASS K) | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 43.70%
EQ/LONG-TERM BOND PORTFOLIO - (CLASS K) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 49.90%
EQ/LONG-TERM BOND PORTFOLIO - (CLASS K) | U.S. Government Agency Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
EQ/LONG-TERM BOND PORTFOLIO - (CLASS K) | Supranational [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/LONG-TERM BOND PORTFOLIO - (CLASS K) | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS IB) | Oracle Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS IB) | Netflix, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS IB) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS IB) | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS IB) | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS IB) | Tesla, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS IB) | Alphabet, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS IB) | Visa, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS IB) | Boeing Co. (The) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS IB) | Monster Beverage Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.00%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.80%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.90%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.50%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (2.00%)
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS K) | Oracle Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS K) | Netflix, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS K) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS K) | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS K) | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS K) | Tesla, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS K) | Alphabet, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS K) | Visa, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS K) | Boeing Co. (The) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS K) | Monster Beverage Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.00%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.80%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.90%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.50%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/LOOMIS SAYLES GROWTH PORTFOLIO (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (2.00%)
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.90%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.90%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.20%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.30%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.60%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.80%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.20%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS IB) | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS IB) | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 10.40%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS IB) | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS IB) | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS IB) | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 16.80%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS IB) | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS IB) | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS IB) | Other Country Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.30%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS IB) | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS IB) | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS IB) | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.90%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.90%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.20%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.30%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.60%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.80%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.20%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS K) | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS K) | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 10.40%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS K) | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS K) | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS K) | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 16.80%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS K) | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS K) | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS K) | Other Country Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.30%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS K) | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS K) | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
EQ/MFS INTERNATIONAL GROWTH PORTFOLIO (CLASS K) | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
EQ/MFS INTERNATIONAL INTRINSIC VALUE PORTFOLIO (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.60%
EQ/MFS INTERNATIONAL INTRINSIC VALUE PORTFOLIO (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
EQ/MFS INTERNATIONAL INTRINSIC VALUE PORTFOLIO (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.00%
EQ/MFS INTERNATIONAL INTRINSIC VALUE PORTFOLIO (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 25.80%
EQ/MFS INTERNATIONAL INTRINSIC VALUE PORTFOLIO (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.50%
EQ/MFS INTERNATIONAL INTRINSIC VALUE PORTFOLIO (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
EQ/MFS INTERNATIONAL INTRINSIC VALUE PORTFOLIO (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.50%
EQ/MFS INTERNATIONAL INTRINSIC VALUE PORTFOLIO (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
EQ/MFS INTERNATIONAL INTRINSIC VALUE PORTFOLIO (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
EQ/MFS INTERNATIONAL INTRINSIC VALUE PORTFOLIO (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/MFS INTERNATIONAL INTRINSIC VALUE PORTFOLIO (CLASS IB) | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
EQ/MFS INTERNATIONAL INTRINSIC VALUE PORTFOLIO (CLASS IB) | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 12.60%
EQ/MFS INTERNATIONAL INTRINSIC VALUE PORTFOLIO (CLASS IB) | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 11.20%
EQ/MFS INTERNATIONAL INTRINSIC VALUE PORTFOLIO (CLASS IB) | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
EQ/MFS INTERNATIONAL INTRINSIC VALUE PORTFOLIO (CLASS IB) | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 15.30%
EQ/MFS INTERNATIONAL INTRINSIC VALUE PORTFOLIO (CLASS IB) | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 11.90%
EQ/MFS INTERNATIONAL INTRINSIC VALUE PORTFOLIO (CLASS IB) | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
EQ/MFS INTERNATIONAL INTRINSIC VALUE PORTFOLIO (CLASS IB) | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
EQ/MFS INTERNATIONAL INTRINSIC VALUE PORTFOLIO (CLASS IB) | SPAIN  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
EQ/MFS INTERNATIONAL INTRINSIC VALUE PORTFOLIO (CLASS IB) | Other Country Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.30%
EQ/MFS INTERNATIONAL INTRINSIC VALUE PORTFOLIO (CLASS IB) | IRELAND  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
EQ/MFS MID CAP FOCUSED GROWTH PORTFOLIO (CLASS IB) | LPL Financial Holdings, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
EQ/MFS MID CAP FOCUSED GROWTH PORTFOLIO (CLASS IB) | Spotify Technology SA [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
EQ/MFS MID CAP FOCUSED GROWTH PORTFOLIO (CLASS IB) | Howmet Aerospace, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
EQ/MFS MID CAP FOCUSED GROWTH PORTFOLIO (CLASS IB) | Verisk Analytics, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
EQ/MFS MID CAP FOCUSED GROWTH PORTFOLIO (CLASS IB) | Guidewire Software, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
EQ/MFS MID CAP FOCUSED GROWTH PORTFOLIO (CLASS IB) | Take-Two Interactive Software, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
EQ/MFS MID CAP FOCUSED GROWTH PORTFOLIO (CLASS IB) | Axon Enterprise, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/MFS MID CAP FOCUSED GROWTH PORTFOLIO (CLASS IB) | TKO Group Holdings, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
EQ/MFS MID CAP FOCUSED GROWTH PORTFOLIO (CLASS IB) | Monolithic Power Systems, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
EQ/MFS MID CAP FOCUSED GROWTH PORTFOLIO (CLASS IB) | Vistra Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/MFS MID CAP FOCUSED GROWTH PORTFOLIO (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.00%
EQ/MFS MID CAP FOCUSED GROWTH PORTFOLIO (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.30%
EQ/MFS MID CAP FOCUSED GROWTH PORTFOLIO (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.80%
EQ/MFS MID CAP FOCUSED GROWTH PORTFOLIO (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.40%
EQ/MFS MID CAP FOCUSED GROWTH PORTFOLIO (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.40%
EQ/MFS MID CAP FOCUSED GROWTH PORTFOLIO (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.30%
EQ/MFS MID CAP FOCUSED GROWTH PORTFOLIO (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
EQ/MFS MID CAP FOCUSED GROWTH PORTFOLIO (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/MFS MID CAP FOCUSED GROWTH PORTFOLIO (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/MFS MID CAP FOCUSED GROWTH PORTFOLIO (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
EQ/MFS MID CAP FOCUSED GROWTH PORTFOLIO (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
EQ/MFS MID CAP FOCUSED GROWTH PORTFOLIO (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
EQ/MFS TECHNOLOGY PORTFOLIO (CLASS IB) | Oracle Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/MFS TECHNOLOGY PORTFOLIO (CLASS IB) | ServiceNow, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
EQ/MFS TECHNOLOGY PORTFOLIO (CLASS IB) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.40%
EQ/MFS TECHNOLOGY PORTFOLIO (CLASS IB) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
EQ/MFS TECHNOLOGY PORTFOLIO (CLASS IB) | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
EQ/MFS TECHNOLOGY PORTFOLIO (CLASS IB) | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.00%
EQ/MFS TECHNOLOGY PORTFOLIO (CLASS IB) | Broadcom, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
EQ/MFS TECHNOLOGY PORTFOLIO (CLASS IB) | Alphabet, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
EQ/MFS TECHNOLOGY PORTFOLIO (CLASS IB) | International Business Machines Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
EQ/MFS TECHNOLOGY PORTFOLIO (CLASS IB) | Shopify, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/MFS TECHNOLOGY PORTFOLIO (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 71.90%
EQ/MFS TECHNOLOGY PORTFOLIO (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/MFS TECHNOLOGY PORTFOLIO (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.70%
EQ/MFS TECHNOLOGY PORTFOLIO (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
EQ/MFS TECHNOLOGY PORTFOLIO (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/MFS TECHNOLOGY PORTFOLIO (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
EQ/MFS TECHNOLOGY PORTFOLIO (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS IB) | Constellation Energy Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS IB) | NextEra Energy, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS IB) | PG And E Corp [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS IB) | Vistra Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS IB) | Xcel Energy, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS IB) | DTE Energy Co. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS IB) | Sempra [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS IB) | Southern Co. (The) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS IB) | Dominion Energy, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS IB) | American Electric Power Co., Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 93.40%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS IB) | Gas Utilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS IB) | Water Utilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS IB) | Diversified Telecommunication Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS IB) | Wireless Telecommunication Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS IB) | Specialized REITs [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS IB) | Electric Utilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 56.90%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS IB) | Multi-Utilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.10%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS IB) | Independent Power and Renewable Electricity Producers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.80%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS K) | Constellation Energy Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS K) | NextEra Energy, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS K) | PG And E Corp [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS K) | Vistra Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS K) | Xcel Energy, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS K) | DTE Energy Co. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS K) | Sempra [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS K) | Southern Co. (The) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS K) | Dominion Energy, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS K) | American Electric Power Co., Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 93.40%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS K) | Gas Utilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS K) | Water Utilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS K) | Diversified Telecommunication Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS K) | Wireless Telecommunication Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS K) | Specialized REITs [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS K) | Electric Utilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 56.90%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS K) | Multi-Utilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.10%
EQ/MFS UTILITIES SERIES PORTFOLIO (CLASS K) | Independent Power and Renewable Electricity Producers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.80%
EQ/MID CAP INDEX PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.60%
EQ/MID CAP INDEX PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.30%
EQ/MID CAP INDEX PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
EQ/MID CAP INDEX PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
EQ/MID CAP INDEX PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.20%
EQ/MID CAP INDEX PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.80%
EQ/MID CAP INDEX PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
EQ/MID CAP INDEX PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
EQ/MID CAP INDEX PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
EQ/MID CAP INDEX PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
EQ/MID CAP INDEX PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
EQ/MID CAP INDEX PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
EQ/MID CAP INDEX PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.30%)
EQ/MID CAP INDEX PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.60%
EQ/MID CAP INDEX PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.30%
EQ/MID CAP INDEX PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
EQ/MID CAP INDEX PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
EQ/MID CAP INDEX PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.20%
EQ/MID CAP INDEX PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.80%
EQ/MID CAP INDEX PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
EQ/MID CAP INDEX PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
EQ/MID CAP INDEX PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
EQ/MID CAP INDEX PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
EQ/MID CAP INDEX PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
EQ/MID CAP INDEX PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
EQ/MID CAP INDEX PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.30%)
EQ/MID CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Exchange Traded Funds Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.50%
EQ/MID CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
EQ/MID CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
EQ/MID CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/MID CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
EQ/MID CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.20%
EQ/MID CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.00%
EQ/MID CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
EQ/MID CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
EQ/MID CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
EQ/MID CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
EQ/MID CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
EQ/MID CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
EQ/MID CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
EQ/MID CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Exchange Traded Funds Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.50%
EQ/MID CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
EQ/MID CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
EQ/MID CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/MID CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
EQ/MID CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.20%
EQ/MID CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.00%
EQ/MID CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
EQ/MID CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
EQ/MID CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
EQ/MID CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
EQ/MID CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
EQ/MID CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
EQ/MID CAP VALUE MANAGED VOLATILITY PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
EQ/MONEY MARKET PORTFOLIO - (CLASS IA) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (2.70%)
EQ/MONEY MARKET PORTFOLIO - (CLASS IA) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.90%
EQ/MONEY MARKET PORTFOLIO - (CLASS IA) | U.S. Government Agency Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.50%
EQ/MONEY MARKET PORTFOLIO - (CLASS IA) | Repurchase Agreements [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 56.30%
EQ/MONEY MARKET PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (2.70%)
EQ/MONEY MARKET PORTFOLIO - (CLASS IB) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.90%
EQ/MONEY MARKET PORTFOLIO - (CLASS IB) | U.S. Government Agency Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.50%
EQ/MONEY MARKET PORTFOLIO - (CLASS IB) | Repurchase Agreements [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 56.30%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Landbridge Co. LLC, Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Cloudflare, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | IonQ, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Oddity Tech Ltd., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Global-e Online Ltd. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | MicroStrategy, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Roivant Sciences Ltd. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Core & Main, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Aurora Innovation, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Peloton Interactive, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 25.30%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.50%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.60%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.80%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.60%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (9.30%)
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Landbridge Co. LLC, Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Cloudflare, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS K) | IonQ, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Oddity Tech Ltd., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Global-e Online Ltd. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS K) | MicroStrategy, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Roivant Sciences Ltd. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Core & Main, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Aurora Innovation, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Peloton Interactive, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 25.30%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.50%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.60%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.80%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.60%
EQ/MORGAN STANLEY SMALL CAP GROWTH PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (9.30%)
EQ/PIMCO GLOBAL REAL RETURN PORTFOLIO - (CLASS IB) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
EQ/PIMCO GLOBAL REAL RETURN PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (58.30%) [2]
EQ/PIMCO GLOBAL REAL RETURN PORTFOLIO - (CLASS IB) | Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.30%
EQ/PIMCO GLOBAL REAL RETURN PORTFOLIO - (CLASS IB) | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/PIMCO GLOBAL REAL RETURN PORTFOLIO - (CLASS IB) | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
EQ/PIMCO GLOBAL REAL RETURN PORTFOLIO - (CLASS IB) | Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
EQ/PIMCO GLOBAL REAL RETURN PORTFOLIO - (CLASS IB) | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 70.90%
EQ/PIMCO GLOBAL REAL RETURN PORTFOLIO - (CLASS IB) | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
EQ/PIMCO GLOBAL REAL RETURN PORTFOLIO - (CLASS IB) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 61.10%
EQ/PIMCO GLOBAL REAL RETURN PORTFOLIO - (CLASS IB) | Supranational [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/PIMCO GLOBAL REAL RETURN PORTFOLIO - (CLASS IB) | Options Purchased [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/PIMCO GLOBAL REAL RETURN PORTFOLIO - (CLASS K) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
EQ/PIMCO GLOBAL REAL RETURN PORTFOLIO - (CLASS K) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (58.30%) [2]
EQ/PIMCO GLOBAL REAL RETURN PORTFOLIO - (CLASS K) | Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.30%
EQ/PIMCO GLOBAL REAL RETURN PORTFOLIO - (CLASS K) | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
EQ/PIMCO GLOBAL REAL RETURN PORTFOLIO - (CLASS K) | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
EQ/PIMCO GLOBAL REAL RETURN PORTFOLIO - (CLASS K) | Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
EQ/PIMCO GLOBAL REAL RETURN PORTFOLIO - (CLASS K) | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 70.90%
EQ/PIMCO GLOBAL REAL RETURN PORTFOLIO - (CLASS K) | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
EQ/PIMCO GLOBAL REAL RETURN PORTFOLIO - (CLASS K) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 61.10%
EQ/PIMCO GLOBAL REAL RETURN PORTFOLIO - (CLASS K) | Supranational [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/PIMCO GLOBAL REAL RETURN PORTFOLIO - (CLASS K) | Options Purchased [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/PIMCO REAL RETURN PORTFOLIO - (CLASS IB) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 63.80%
EQ/PIMCO REAL RETURN PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (99.40%) [3]
EQ/PIMCO REAL RETURN PORTFOLIO - (CLASS IB) | Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.30%
EQ/PIMCO REAL RETURN PORTFOLIO - (CLASS IB) | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
EQ/PIMCO REAL RETURN PORTFOLIO - (CLASS IB) | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
EQ/PIMCO REAL RETURN PORTFOLIO - (CLASS IB) | Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
EQ/PIMCO REAL RETURN PORTFOLIO - (CLASS IB) | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/PIMCO REAL RETURN PORTFOLIO - (CLASS IB) | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/PIMCO REAL RETURN PORTFOLIO - (CLASS IB) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 107.80%
EQ/PIMCO TOTAL RETURN ESG PORTFOLIO - (CLASS IB) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
EQ/PIMCO TOTAL RETURN ESG PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (25.40%) [2]
EQ/PIMCO TOTAL RETURN ESG PORTFOLIO - (CLASS IB) | Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 47.60%
EQ/PIMCO TOTAL RETURN ESG PORTFOLIO - (CLASS IB) | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
EQ/PIMCO TOTAL RETURN ESG PORTFOLIO - (CLASS IB) | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/PIMCO TOTAL RETURN ESG PORTFOLIO - (CLASS IB) | Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
EQ/PIMCO TOTAL RETURN ESG PORTFOLIO - (CLASS IB) | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
EQ/PIMCO TOTAL RETURN ESG PORTFOLIO - (CLASS IB) | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 29.30%
EQ/PIMCO TOTAL RETURN ESG PORTFOLIO - (CLASS IB) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.70%
EQ/PIMCO TOTAL RETURN ESG PORTFOLIO - (CLASS IB) | Supranational [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
EQ/PIMCO TOTAL RETURN ESG PORTFOLIO - (CLASS IB) | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
EQ/PIMCO TOTAL RETURN ESG PORTFOLIO - (CLASS IB) | Swaptions Purchased [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
EQ/PIMCO TOTAL RETURN ESG PORTFOLIO - (CLASS IB) | Options Purchased [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
EQ/PIMCO ULTRA SHORT BOND PORTFOLIO - (CLASS IB) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
EQ/PIMCO ULTRA SHORT BOND PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
EQ/PIMCO ULTRA SHORT BOND PORTFOLIO - (CLASS IB) | Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
EQ/PIMCO ULTRA SHORT BOND PORTFOLIO - (CLASS IB) | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.00%
EQ/PIMCO ULTRA SHORT BOND PORTFOLIO - (CLASS IB) | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.20%
EQ/PIMCO ULTRA SHORT BOND PORTFOLIO - (CLASS IB) | Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
EQ/PIMCO ULTRA SHORT BOND PORTFOLIO - (CLASS IB) | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
EQ/PIMCO ULTRA SHORT BOND PORTFOLIO - (CLASS IB) | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 37.10%
EQ/PIMCO ULTRA SHORT BOND PORTFOLIO - (CLASS IB) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
EQ/PIMCO ULTRA SHORT BOND PORTFOLIO - (CLASS IB) | U.S. Government Agency Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
EQ/PIMCO ULTRA SHORT BOND PORTFOLIO - (CLASS IB) | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
EQ/PIMCO ULTRA SHORT BOND PORTFOLIO - (CLASS K) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
EQ/PIMCO ULTRA SHORT BOND PORTFOLIO - (CLASS K) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
EQ/PIMCO ULTRA SHORT BOND PORTFOLIO - (CLASS K) | Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
EQ/PIMCO ULTRA SHORT BOND PORTFOLIO - (CLASS K) | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.00%
EQ/PIMCO ULTRA SHORT BOND PORTFOLIO - (CLASS K) | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.20%
EQ/PIMCO ULTRA SHORT BOND PORTFOLIO - (CLASS K) | Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
EQ/PIMCO ULTRA SHORT BOND PORTFOLIO - (CLASS K) | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
EQ/PIMCO ULTRA SHORT BOND PORTFOLIO - (CLASS K) | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 37.10%
EQ/PIMCO ULTRA SHORT BOND PORTFOLIO - (CLASS K) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
EQ/PIMCO ULTRA SHORT BOND PORTFOLIO - (CLASS K) | U.S. Government Agency Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
EQ/PIMCO ULTRA SHORT BOND PORTFOLIO - (CLASS K) | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS IA) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS IA) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (8.10%)
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS IA) | Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS IA) | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS IA) | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS IA) | Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS IA) | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS IA) | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.40%
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS IA) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.20%
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS IA) | U.S. Government Agency Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 47.70%
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS IA) | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS IB) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (8.10%)
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS IB) | Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS IB) | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS IB) | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS IB) | Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS IB) | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS IB) | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.40%
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS IB) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.20%
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS IB) | U.S. Government Agency Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 47.70%
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS IB) | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS K) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS K) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (8.10%)
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS K) | Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS K) | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS K) | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS K) | Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS K) | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS K) | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.40%
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS K) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.20%
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS K) | U.S. Government Agency Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 47.70%
EQ/QUALITY BOND PLUS PORTFOLIO - (CLASS K) | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
EQ/SMALL COMPANY INDEX PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.50%
EQ/SMALL COMPANY INDEX PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.00%
EQ/SMALL COMPANY INDEX PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/SMALL COMPANY INDEX PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.70%
EQ/SMALL COMPANY INDEX PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.20%
EQ/SMALL COMPANY INDEX PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.90%
EQ/SMALL COMPANY INDEX PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
EQ/SMALL COMPANY INDEX PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
EQ/SMALL COMPANY INDEX PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/SMALL COMPANY INDEX PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
EQ/SMALL COMPANY INDEX PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
EQ/SMALL COMPANY INDEX PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
EQ/SMALL COMPANY INDEX PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (3.00%)
EQ/SMALL COMPANY INDEX PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.50%
EQ/SMALL COMPANY INDEX PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.00%
EQ/SMALL COMPANY INDEX PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/SMALL COMPANY INDEX PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.70%
EQ/SMALL COMPANY INDEX PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.20%
EQ/SMALL COMPANY INDEX PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.90%
EQ/SMALL COMPANY INDEX PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
EQ/SMALL COMPANY INDEX PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
EQ/SMALL COMPANY INDEX PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/SMALL COMPANY INDEX PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
EQ/SMALL COMPANY INDEX PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
EQ/SMALL COMPANY INDEX PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
EQ/SMALL COMPANY INDEX PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (3.00%)
EQ/T. ROWE PRICE HEALTH SCIENCES PORTFOLIO - (CLASS IB) | Stryker Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
EQ/T. ROWE PRICE HEALTH SCIENCES PORTFOLIO - (CLASS IB) | Boston Scientific Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
EQ/T. ROWE PRICE HEALTH SCIENCES PORTFOLIO - (CLASS IB) | Eli Lilly And Co [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.00%
EQ/T. ROWE PRICE HEALTH SCIENCES PORTFOLIO - (CLASS IB) | Intuitive Surgical, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
EQ/T. ROWE PRICE HEALTH SCIENCES PORTFOLIO - (CLASS IB) | UnitedHealth Group, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
EQ/T. ROWE PRICE HEALTH SCIENCES PORTFOLIO - (CLASS IB) | Vertex Pharmaceuticals, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
EQ/T. ROWE PRICE HEALTH SCIENCES PORTFOLIO - (CLASS IB) | Argenx SE (ADR) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
EQ/T. ROWE PRICE HEALTH SCIENCES PORTFOLIO - (CLASS IB) | Danaher Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
EQ/T. ROWE PRICE HEALTH SCIENCES PORTFOLIO - (CLASS IB) | Thermo Fisher Scientific, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/T. ROWE PRICE HEALTH SCIENCES PORTFOLIO - (CLASS IB) | Alnylam Pharmaceuticals, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
EQ/T. ROWE PRICE HEALTH SCIENCES PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 98.70%
EQ/T. ROWE PRICE HEALTH SCIENCES PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
EQ/T. ROWE PRICE HEALTH SCIENCES PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
EQ/T. ROWE PRICE HEALTH SCIENCES PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
EQ/T. ROWE PRICE HEALTH SCIENCES PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
EQ/T. ROWE PRICE HEALTH SCIENCES PORTFOLIO - (CLASS IB) | Biotechnology [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 38.10%
EQ/T. ROWE PRICE HEALTH SCIENCES PORTFOLIO - (CLASS IB) | Health Care Equipment And Supplies [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.20%
EQ/T. ROWE PRICE HEALTH SCIENCES PORTFOLIO - (CLASS IB) | Pharmaceuticals [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.10%
EQ/T. ROWE PRICE HEALTH SCIENCES PORTFOLIO - (CLASS IB) | Health Care Providers & Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.00%
EQ/T. ROWE PRICE HEALTH SCIENCES PORTFOLIO - (CLASS IB) | Life Sciences Tools & Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
EQ/T. ROWE PRICE HEALTH SCIENCES PORTFOLIO - (CLASS IB) | Health Care Technology [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
EQ/T. ROWE PRICE HEALTH SCIENCES PORTFOLIO - (CLASS IB) | Capital Markets [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/T. ROWE PRICE HEALTH SCIENCES PORTFOLIO - (CLASS IB) | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
EQ/T. ROWE PRICE HEALTH SCIENCES PORTFOLIO - (CLASS IB) | Chemicals Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
EQ/VALUE EQUITY PORTFOLIO - (CLASS IB) | Martin Marietta Materials, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
EQ/VALUE EQUITY PORTFOLIO - (CLASS IB) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
EQ/VALUE EQUITY PORTFOLIO - (CLASS IB) | Parker-Hannifin Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
EQ/VALUE EQUITY PORTFOLIO - (CLASS IB) | Corteva, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
EQ/VALUE EQUITY PORTFOLIO - (CLASS IB) | Capital One Financial Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
EQ/VALUE EQUITY PORTFOLIO - (CLASS IB) | Ameriprise Financial, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/VALUE EQUITY PORTFOLIO - (CLASS IB) | Sony Group Corp. (ADR) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/VALUE EQUITY PORTFOLIO - (CLASS IB) | Atmos Energy Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/VALUE EQUITY PORTFOLIO - (CLASS IB) | Ecolab, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/VALUE EQUITY PORTFOLIO - (CLASS IB) | Uber Technologies, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
EQ/VALUE EQUITY PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.70%
EQ/VALUE EQUITY PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
EQ/VALUE EQUITY PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
EQ/VALUE EQUITY PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
EQ/VALUE EQUITY PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.90%
EQ/VALUE EQUITY PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.80%
EQ/VALUE EQUITY PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
EQ/VALUE EQUITY PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/VALUE EQUITY PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.70%
EQ/VALUE EQUITY PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.20%
EQ/VALUE EQUITY PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
EQ/VALUE EQUITY PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
EQ/VALUE EQUITY PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
EQ/VALUE EQUITY PORTFOLIO - (CLASS K) | Martin Marietta Materials, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
EQ/VALUE EQUITY PORTFOLIO - (CLASS K) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
EQ/VALUE EQUITY PORTFOLIO - (CLASS K) | Parker-Hannifin Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
EQ/VALUE EQUITY PORTFOLIO - (CLASS K) | Corteva, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
EQ/VALUE EQUITY PORTFOLIO - (CLASS K) | Capital One Financial Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
EQ/VALUE EQUITY PORTFOLIO - (CLASS K) | Ameriprise Financial, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
EQ/VALUE EQUITY PORTFOLIO - (CLASS K) | Sony Group Corp. (ADR) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
EQ/VALUE EQUITY PORTFOLIO - (CLASS K) | Atmos Energy Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/VALUE EQUITY PORTFOLIO - (CLASS K) | Ecolab, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
EQ/VALUE EQUITY PORTFOLIO - (CLASS K) | Uber Technologies, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
EQ/VALUE EQUITY PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.70%
EQ/VALUE EQUITY PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
EQ/VALUE EQUITY PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
EQ/VALUE EQUITY PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
EQ/VALUE EQUITY PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.90%
EQ/VALUE EQUITY PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.80%
EQ/VALUE EQUITY PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
EQ/VALUE EQUITY PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
EQ/VALUE EQUITY PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.70%
EQ/VALUE EQUITY PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.20%
EQ/VALUE EQUITY PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
EQ/VALUE EQUITY PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
EQ/VALUE EQUITY PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
EQ/WELLINGTON ENERGY PORTFOLIO - (CLASS IB) | Exxon Mobil Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
EQ/WELLINGTON ENERGY PORTFOLIO - (CLASS IB) | Shell plc (London Stock Exchange) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
EQ/WELLINGTON ENERGY PORTFOLIO - (CLASS IB) | Marathon Petroleum Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
EQ/WELLINGTON ENERGY PORTFOLIO - (CLASS IB) | Williams Cos., Inc. (The) [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
EQ/WELLINGTON ENERGY PORTFOLIO - (CLASS IB) | TotalEnergies SE [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
EQ/WELLINGTON ENERGY PORTFOLIO - (CLASS IB) | Hess Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
EQ/WELLINGTON ENERGY PORTFOLIO - (CLASS IB) | Coterra Energy, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
EQ/WELLINGTON ENERGY PORTFOLIO - (CLASS IB) | EQT Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
EQ/WELLINGTON ENERGY PORTFOLIO - (CLASS IB) | Chevron Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
EQ/WELLINGTON ENERGY PORTFOLIO - (CLASS IB) | ONEOK, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
EQ/WELLINGTON ENERGY PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
EQ/WELLINGTON ENERGY PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.40%
EQ/WELLINGTON ENERGY PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 87.50%
EQ/WELLINGTON ENERGY PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
EQ/WELLINGTON ENERGY PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%)
EQ/WELLINGTON ENERGY PORTFOLIO - (CLASS IB) | Oil, Gas & Consumable Fuels [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 83.80%
EQ/WELLINGTON ENERGY PORTFOLIO - (CLASS IB) | Energy Equipment & Services [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
EQ/WELLINGTON ENERGY PORTFOLIO - (CLASS IB) | Electric Utilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
EQ/WELLINGTON ENERGY PORTFOLIO - (CLASS IB) | Multi-Utilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
EQ/WELLINGTON ENERGY PORTFOLIO - (CLASS IB) | Independent Power and Renewable Electricity Producers [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
EQ/WELLINGTON ENERGY PORTFOLIO - (CLASS IB) | Semiconductors & Semiconductor Equipment [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IA) | JPMorgan Prime Money Market Fund, IM Shares [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.90%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IA) | Netflix, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IA) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IA) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IA) | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IA) | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IA) | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IA) | Broadcom, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IA) | Alphabet, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IA) | Vanguard Growth ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IA) | Exchange Traded Funds Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IA) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 34.40%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IA) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IA) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.30%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IA) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IA) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IA) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IA) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IA) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IA) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IA) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IA) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IA) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.10%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IA) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IB) | JPMorgan Prime Money Market Fund, IM Shares [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.90%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IB) | Netflix, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IB) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IB) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IB) | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IB) | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IB) | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IB) | Broadcom, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IB) | Alphabet, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IB) | Vanguard Growth ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IB) | Exchange Traded Funds Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 34.40%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.30%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IB) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IB) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IB) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.10%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS K) | JPMorgan Prime Money Market Fund, IM Shares [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.90%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS K) | Netflix, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS K) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS K) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS K) | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS K) | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS K) | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS K) | Broadcom, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS K) | Alphabet, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS K) | Vanguard Growth ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS K) | Exchange Traded Funds Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 34.40%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.30%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS K) | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS K) | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS K) | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.10%
MULTIMANAGER AGGRESSIVE EQUITY PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
MULTIMANAGER CORE BOND PORTFOLIO - (CLASS IB) | Short Term Investments Security Allocation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
MULTIMANAGER CORE BOND PORTFOLIO - (CLASS IB) | Cash and Other Assets Less Liabilities Security [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (16.00%)
MULTIMANAGER CORE BOND PORTFOLIO - (CLASS IB) | Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 27.90%
MULTIMANAGER CORE BOND PORTFOLIO - (CLASS IB) | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.20%
MULTIMANAGER CORE BOND PORTFOLIO - (CLASS IB) | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.70%
MULTIMANAGER CORE BOND PORTFOLIO - (CLASS IB) | Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
MULTIMANAGER CORE BOND PORTFOLIO - (CLASS IB) | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
MULTIMANAGER CORE BOND PORTFOLIO - (CLASS IB) | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 27.70%
MULTIMANAGER CORE BOND PORTFOLIO - (CLASS IB) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 27.90%
MULTIMANAGER CORE BOND PORTFOLIO - (CLASS IB) | U.S. Government Agency Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
MULTIMANAGER CORE BOND PORTFOLIO - (CLASS IB) | Supranational [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
MULTIMANAGER CORE BOND PORTFOLIO - (CLASS IB) | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
MULTIMANAGER CORE BOND PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (16.00%)
MULTIMANAGER CORE BOND PORTFOLIO - (CLASS K) | Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 27.90%
MULTIMANAGER CORE BOND PORTFOLIO - (CLASS K) | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.20%
MULTIMANAGER CORE BOND PORTFOLIO - (CLASS K) | Collateralized Mortgage Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.70%
MULTIMANAGER CORE BOND PORTFOLIO - (CLASS K) | Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
MULTIMANAGER CORE BOND PORTFOLIO - (CLASS K) | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
MULTIMANAGER CORE BOND PORTFOLIO - (CLASS K) | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 27.70%
MULTIMANAGER CORE BOND PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
MULTIMANAGER CORE BOND PORTFOLIO - (CLASS K) | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 27.90%
MULTIMANAGER CORE BOND PORTFOLIO - (CLASS K) | U.S. Government Agency Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
MULTIMANAGER CORE BOND PORTFOLIO - (CLASS K) | Supranational [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
MULTIMANAGER CORE BOND PORTFOLIO - (CLASS K) | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS IB) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS IB) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS IB) | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS IB) | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS IB) | Broadcom, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS IB) | Alphabet, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS IB) | iShares Expanded Tech Sector ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.20%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS IB) | Vanguard Information Technology ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.20%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS IB) | Technology Select Sector SPDR Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS IB) | Taiwan Semiconductor Manufacturing Co. Ltd. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS IB) | Exchange Traded Funds Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 30.40%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS IB) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 51.30%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS IB) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS IB) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.40%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS IB) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS IB) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS IB) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS IB) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS IB) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS IB) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS IB) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (2.70%)
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS K) | NVIDIA Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS K) | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS K) | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS K) | Meta Platforms, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS K) | Broadcom, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS K) | Alphabet, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS K) | iShares Expanded Tech Sector ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.20%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS K) | Vanguard Information Technology ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.20%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS K) | Technology Select Sector SPDR Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS K) | Taiwan Semiconductor Manufacturing Co. Ltd. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS K) | Exchange Traded Funds Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 30.40%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS K) | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 51.30%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS K) | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS K) | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.40%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS K) | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS K) | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS K) | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS K) | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS K) | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS K) | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
MULTIMANAGER TECHNOLOGY PORTFOLIO - (CLASS K) | Cash And Other Assets Less Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (2.70%)
[1] Less than 0.05%
[2] Liabilities include payable amounts for sale-buyback financing transactions and forward settling transactions, and the impact of the Portfolio’s open positions in derivatives (other than options purchased), if any.
[3] Liabilities include payable amounts for securities purchased and sale-buyback financing transactions, and the impact of the Portfolio’s open positions in derivatives (other than options purchased), if any.