v3.25.2
Shareholder Report, Holdings (Details)
Jun. 30, 2025
Variable Portfolio – Managed Volatility Conservative Fund - Class 1 | Long Equity Risk [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
Variable Portfolio – Managed Volatility Conservative Fund - Class 1 | Long Foreign Exchange Risk [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Variable Portfolio – Managed Volatility Conservative Fund - Class 1 | Long Interest Rate Risk [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
Variable Portfolio – Managed Volatility Conservative Fund - Class 1 | Short Equity Risk [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.40%
Variable Portfolio – Managed Volatility Conservative Fund - Class 1 | Short Foreign Exchange Risk [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
Variable Portfolio – Managed Volatility Conservative Fund - Class 1 | Short Interest Rate Risk [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Variable Portfolio – Managed Volatility Conservative Fund - Class 1 | Fixed Income Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 54.60%
Variable Portfolio – Managed Volatility Conservative Fund - Class 1 | Equity Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.10%
Variable Portfolio – Managed Volatility Conservative Fund - Class 1 | Money Market Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.50%
Variable Portfolio – Managed Volatility Conservative Fund - Class 1 | Residential Mortgage-Backed Securities - Agency [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
Variable Portfolio – Managed Volatility Conservative Fund - Class 1 | Exchange-Traded Fixed Income Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
Variable Portfolio – Managed Volatility Conservative Fund - Class 1 | Exchange-Traded Equity Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Variable Portfolio – Managed Volatility Conservative Fund - Class 1 | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Variable Portfolio – Managed Volatility Conservative Fund - Class 2 | Long Equity Risk [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
Variable Portfolio – Managed Volatility Conservative Fund - Class 2 | Long Foreign Exchange Risk [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Variable Portfolio – Managed Volatility Conservative Fund - Class 2 | Long Interest Rate Risk [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
Variable Portfolio – Managed Volatility Conservative Fund - Class 2 | Short Equity Risk [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.40%
Variable Portfolio – Managed Volatility Conservative Fund - Class 2 | Short Foreign Exchange Risk [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
Variable Portfolio – Managed Volatility Conservative Fund - Class 2 | Short Interest Rate Risk [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Variable Portfolio – Managed Volatility Conservative Fund - Class 2 | Fixed Income Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 54.60%
Variable Portfolio – Managed Volatility Conservative Fund - Class 2 | Equity Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.10%
Variable Portfolio – Managed Volatility Conservative Fund - Class 2 | Money Market Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 17.50%
Variable Portfolio – Managed Volatility Conservative Fund - Class 2 | Residential Mortgage-Backed Securities - Agency [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
Variable Portfolio – Managed Volatility Conservative Fund - Class 2 | Exchange-Traded Fixed Income Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
Variable Portfolio – Managed Volatility Conservative Fund - Class 2 | Exchange-Traded Equity Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Variable Portfolio – Managed Volatility Conservative Fund - Class 2 | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%