Net Assets Investment Company, Portfolio Turnover C000200580 [Member] Empower Core Strategies: Flexible Bond Fund - Institutional Class Investment Type [Axis] Aa1 [Member] A2 [Member] A3 [Member] Aa2 [Member] Aa3 [Member] Aaa [Member] B1 [Member] B2 [Member] B3 [Member] Ba1 [Member] Ba2 [Member] Ba3 [Member] Baa1 [Member] Baa2 [Member] Baa3 [Member] CCC, CC, C [Member] Equities [Member] Not Rated [Member] A1 [Member] United States Treasury Note Bond Four Point One Three Percent [Member] United States Treasury Note/Bond 4.13% [Member] United States Treasury Note Bond Three Point Five Zero Percent [Member] United States Treasury Note/Bond 3.50% [Member] United States Treasury Note Bond Three Point Eight Eight Percent [Member] United States Treasury Note/Bond 3.88% [Member] United States Treasury Note/Bond 4.63% [Member] United States Treasury Note/Bond 4.63% [Member] United States Treasury Note/Bond 4.38% [Member] United States Treasury Note/Bond 4.38% [Member] United States Treasury Note/Bond 4.00% [Member] United States Treasury Note/Bond 4.00% [Member] United States Treasury Note/Bond 3.75% [Member] United States Treasury Note/Bond 3.75% [Member] United States Treasury Note Bond Five Point Zero Zero Percent [Member] United States Treasury Note/Bond 5.00% [Member] United States Treasury Note Bond Four Point Six Three Percent One [Member] United States Treasury Note/Bond 4.63% [Member] United States Treasury Note Bond Three Point Eight Eight Percent One [Member] United States Treasury Note/Bond 3.88% [Member] C000204662 [Member] Empower Core Strategies: Flexible Bond Fund - Investor Class C000200581 [Member] Empower Core Strategies: Inflation-Protected Securities Fund - Institutional Class Short Term Investments [Member] Other [Member] U.S. Treasury Inflation Indexed Bonds TIPS 1.88% [Member] U.S. Treasury Inflation Indexed Bonds TIPS 1.88% [Member] U.S. Treasury Inflation Indexed Bonds TIPS 0.13% [Member] U.S. Treasury Inflation Indexed Bonds TIPS 0.13% [Member] U.S. Treasury Inflation Indexed Bonds TIPS 1.63% [Member] U.S. Treasury Inflation Indexed Bonds TIPS 1.63% [Member] US Treasury Inflation Indexed Bonds TIPS Zero Point Two Five Percent [Member] U.S. Treasury Inflation Indexed Bonds TIPS 0.25% [Member] US Treasury Inflation Indexed Bonds TIPS One Point Eight Eight Percent One [Member] U.S. Treasury Inflation Indexed Bonds TIPS 1.88% [Member] Federal Home Loan Bank Three Point Seven Zero Percent [Member] Federal Home Loan Bank 3.70% [Member] US Treasury Inflation Indexed Bonds TIPS Two Point Three Eight Percent [Member] U.S. Treasury Inflation Indexed Bonds TIPS 2.38% [Member] Uniform Mortgage Backed Security Six Point Zero Zero [Member] Uniform Mortgage-Backed Security 6.00% [Member] Uniform Mortgage Backed Security Five Point Five Zero [Member] Uniform Mortgage-Backed Security 5.50% [Member] US Treasury Inflation Indexed Bonds TIPS One Point One Three Percent [Member] U.S. Treasury Inflation Indexed Bonds TIPS 1.13% [Member] C000204664 [Member] Empower Core Strategies: Inflation-Protected Securities Fund - Investor Class U.S. Treasury Inflation Indexed Bonds TIPS 1.63%[Member] U.S. Treasury Inflation Indexed Bonds TIPS 1.63%[Member] C000200582 [Member] Empower Core Strategies: International Equity Fund - Institutional Class AUSTRALIA SWITZERLAND GERMANY DENMARK SPAIN FRANCE UNITED KINGDOM HONG KONG IRELAND ISRAEL ITALY JAPAN NETHERLANDS NORWAY SWEDEN SINGAPORE TAIWAN UNITED STATES Countries [Member] ASML Holding NV [Member] Novartis AG [Member] Roche Holding AG [Member] Shell PLC [Member] Taiwan Semiconductor Manufacturing Co Ltd Sponsored ADR [Member] Novo Nordisk A/S Class B [Member] HSBC Holdings PLC [Member] Unilever PLC [Member] U.S. Treasury Bills 3.66% [Member] Tencent Holdings Ltd [Member] C000204665 [Member] Empower Core Strategies: International Equity Fund - Investor Class C000200584 [Member] Empower Core Strategies: U.S. Equity Fund - Institutional Class Basic Materials [Member] Consumer, Cyclical [Member] Consumer, Non-cyclical [Member] Energy Sector [Member] Financial Services Sector [Member] Government Money Market Mutual Funds [Member] Technology Sector [Member] Exchange Traded Funds [Member] Alphabet Inc Class A [Member] Alphabet Inc Class C [Member] Amazon.com Inc [Member] Apple Inc [Member] Broadcom Inc [Member] Microsoft Corp [Member] NVIDIA Corp [Member] Tesla Inc [Member] Advanced Micro Devices Inc [Member] Micron Technology Inc [Member] C000204670 [Member] Empower Core Strategies: U.S. Equity Fund - Investor Class