Net Assets Investment Company, Portfolio Turnover C000155762 [Member] Empower Large Cap Growth Fund - Institutional Class C000069812 [Member] Empower Large Cap Growth Fund - Investor Class C000155814 [Member] Empower Large Cap Value Fund - Institutional Class C000101688 [Member] Empower Large Cap Value Fund - Investor Class C000214216 [Member] Empower Large Cap Value Fund - Investor II C000155769 [Member] Empower S&P 500® Index Fund - Institutional Class C000069820 [Member] Empower S&P 500® Index Fund - Investor Class Investment Type [Axis] Technology Sector [Member] Consumer, Non-cyclical [Member] Financial Services Sector [Member] Consumer, Cyclical [Member] Energy Sector [Member] Basic Materials [Member] Government Money Market Mutual Funds [Member] Short Term Investments [Member] NVIDIA Corp [Member] Apple Inc [Member] Microsoft Corp [Member] Amazon.com Inc [Member] Alphabet Inc Class A [Member] Broadcom Inc [Member] Alphabet Inc Class C [Member] Micron Technology Inc [Member] Meta Platforms Inc Class A [Member] Tesla Inc [Member] Citigroup Inc [Member] Cisco Systems Inc [Member] Exxon Mobil Corp [Member] Philip Morris International Inc [Member] Charles Schwab Corp [Member] Bank of America Corp [Member] Southwest Airlines Co [Member] Exchange Traded Funds [Member] Advanced Micro Devices Inc [Member] Eli Lilly And Co [Member] Eli Lilly & Co [Member] Amphenol Corp Class A [Member] ASML Holding NV [Member]