v3.25.1
Label Element Value
Risk Return Abstract rr_RiskReturnAbstract  
Registrant Name dei_EntityRegistrantName EMPOWER FUNDS, INC.
Prospectus Date rr_ProspectusDate Apr. 30, 2025
Empower SP Mid Cap 400 Index Fund  
Risk Return Abstract rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading <span style="color:#000000;font-family:Times New Roman;font-size:12pt;font-weight:bold;">Fund Summary</span>
Objective [Heading] rr_ObjectiveHeading <span style="color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:bold;">Investment Objective</span>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock The Fund seeks investment results, before fees and expenses, that track the total return of the common stocks that comprise the Standard & Poor’s (“S&P”) MidCap 400® Index (the “Benchmark Index”).
Objective, Secondary [Text Block] rr_ObjectiveSecondaryTextBlock  
Expense [Heading] rr_ExpenseHeading <span style="color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:bold;">Fees and Expenses of the Fund</span>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. This table does not reflect the fees and expenses of any Permitted Account. If the fees and expenses of a Permitted Account were reflected, the fees and expenses shown below would be higher.
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <span style="color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:bold;">Annual Fund Operating Expenses</span><span style="color:#000000;font-family:Times New Roman;font-size:10pt;"> (expenses that you pay each year as a percentage of the value of your investment)</span>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination <span style="color:#000000;font-family:Times New Roman;font-size:9pt;">April 30, 2026</span>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <span style="color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:bold;">Portfolio Turnover</span>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate generally indicates higher transaction costs. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s turnover rate was 17% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 17.00%
Expense Example [Heading] rr_ExpenseExampleHeading <span style="color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:bold;">Example</span>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example does not reflect the fees and expenses of any Permitted Account. If the fees and expenses of any Permitted Account were reflected, the fees and expenses in the Example would be higher.The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of each period. The Example also assumes that the Expense Limit is in place for the first year, that your investment has a 5% return each year, that all dividends and capital gains are reinvested, and that the Fund’s operating expenses are the amount shown in the fee table and remain the same for the years shown. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Strategy [Heading] rr_StrategyHeading <span style="color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:bold;">Principal Investment Strategies</span>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock Below is a summary of the principal investment strategies of the Fund.The Fund is not actively managed but is designed to track the performance of its Benchmark Index. The Fund will, under normal circumstances, invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in common stocks of the companies included in the Benchmark Index. The Benchmark Index is designed to measure the performance of 400 midsize companies and represents the mid cap segment of the U.S. equities market.The Fund uses the replication method of indexing, meaning the Fund seeks to own the securities contained in the Benchmark Index in as close as possible a proportion of the Fund as each stock’s weight in the Benchmark Index. The Fund may invest in derivatives, including but not limited to futures contracts on the Benchmark Index and options on futures contracts.Empower Capital Management, LLC (“ECM”) is the Fund’s investment adviser and, subject to the approval of the Board of Directors of Empower Funds (the “Board”), selects the Fund’s sub-adviser and monitors its performance on an ongoing basis. The Fund’s investment portfolio is managed by Irish Life Investment Managers Limited (the “Sub-Adviser” or “ILIM”).
Risk [Heading] rr_RiskHeading <span style="color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:bold;">Principal Investment Risks</span>
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <span style="color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:bold;">Performance</span>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock The bar chart and table below provide an indication of the risk of investment in the Fund by showing changes in the performance of the Fund’s Investor Class shares for the last ten calendar years and by comparing the Fund's average annual total returns to the performance of a broad-based securities market index and the Benchmark Index, which has investment characteristics similar to those of the Fund.The returns shown below are historical and are not an indication of future performance.Total return figures assume reinvestment of dividends and capital gains distributions and include the effect of the Fund’s recurring expenses, but do not include fees and expenses of any Permitted Account. If the fees and expenses of any Permitted Account were reflected, the performance shown would be lower.Updated performance information may be obtained at www.empower.com/investments/empower-funds/fund-documents (the website does not form a part of this Prospectus).
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns <span style="color:#000000;font-family:Times New Roman;font-size:10pt;margin-left:0%;">The bar chart and table below provide an indication of the risk of investment in the Fund by showing changes in the performance of the Fund’s Investor Class shares for the last ten calendar years and by comparing the Fund's average annual total returns to the performance of a broad-based securities market index and the Benchmark Index, which has investment characteristics similar to those of the Fund.</span>
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress <span style="color:#000000;font-family:Times New Roman;font-size:10pt;">www.empower.com/investments/empower-funds/fund-documents</span>
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture <span style="color:#000000;font-family:Times New Roman;font-size:10pt;">The returns shown below are historical and are not an indication of future performance.</span>
Bar Chart [Heading] rr_BarChartHeading <span style="color:#000000;font-family:Times New Roman;font-size:12pt;font-weight:bold;">Calendar Year Total Returns</span>
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads <span style="color:#000000;font-family:Times New Roman;font-size:10pt;">Total return figures </span><span style="color:#000000;font-family:Times New Roman;font-size:10pt;margin-left:0%;">assume reinvestment of dividends and capital gains distributions and include the effect of the Fund’s recurring expenses, but do not include fees and expenses of any Permitted Account. If the fees and expenses of any Permitted Account were reflected, the </span><span style="color:#000000;font-family:Times New Roman;font-size:10pt;">performance shown would be lower.</span>
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Quarter EndedTotal ReturnBest QuarterDecember 31, 202024.20%Worst QuarterMarch 31, 2020-29.73%
Performance Table Heading rr_PerformanceTableHeading <span style="color:#000000;font-family:Times New Roman;font-size:12pt;font-weight:bold;">Average Annual Total Returns for the Periods Ended December 31, 2024</span>
Performance Table Market Index Changed rr_PerformanceTableMarketIndexChanged  
Empower SP Mid Cap 400 Index Fund | Risk Lose Money [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock and is subject to the possible loss of your original investment.
Empower SP Mid Cap 400 Index Fund | Risk Not Insured [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock An investment in the Fund is not a deposit with a bank, is not insured, endorsed or guaranteed by the Federal Deposit Insurance Corporation or any government agency
Empower SP Mid Cap 400 Index Fund | Equity Securities Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Equity Securities Risk - The value of equity securities held by the Fund may decline as a result of factors directly related to a company, a particular industry or industries, or general market conditions that are not specifically related to a company or an industry.
Empower SP Mid Cap 400 Index Fund | Market Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Market Risk - The value of the Fund’s investments may decrease, sometimes rapidly or unexpectedly, due to factors affecting (or perceived to affect) specific issuers held by the Fund, particular industries represented in the Fund’s portfolio, or the overall securities markets. A variety of factors can increase the volatility of the Fund’s holdings and markets generally, including political or regulatory developments, recessions, inflation, deflation, rapid interest rate changes, bank failures, war or acts of terrorism, sanctions, tariffs, natural disasters, outbreaks of infectious illnesses or other widespread public health issues, general outlook for corporate earnings, or adverse investor sentiment generally. Certain events may cause instability across global markets, including reduced liquidity and disruptions in trading markets, while some events may affect certain geographic regions, countries, sectors, and industries more significantly than others. These adverse developments may cause broad declines in an issuer’s value due to short-term market movements or for significantly longer periods during more prolonged market downturns.
Empower SP Mid Cap 400 Index Fund | Small Or Mid Cap Company Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Medium-Size Company Risk - The stocks of medium-size companies often trade in lower volumes, may be less liquid, and are subject to greater or more unpredictable price changes than stocks of larger companies. Such companies may also have limited markets, financial resources or product lines, may lack management depth, and may be more vulnerable to adverse business or market developments. Accordingly, stocks of medium-size companies tend to be more sensitive to changing economic, market, and industry conditions and tend to be more volatile and less liquid than stocks of larger companies, especially over the short term, and are more likely not to survive or accomplish their goals with the result that the value of their stock could decline significantly. In addition, there may be less publicly available information concerning medium-size companies upon which to base an investment decision.
Empower SP Mid Cap 400 Index Fund | Index Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Index Risk - Because the Fund is not actively managed but is designed to track the performance of the Benchmark Index, investors should generally expect the value of the Fund to decline when the performance of the Benchmark Index declines. There is no guarantee that the Fund will achieve a high degree of correlation to the Benchmark Index. Additionally, the Benchmark Index may perform unfavorably and/or underperform the market as a whole. As a result, the Fund may have poor investment results even if it closely tracks the performance of the Benchmark Index because the adverse performance of a particular security normally will not result in eliminating the security from the Fund.
Empower SP Mid Cap 400 Index Fund | Tracking Error Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Tracking Error Risk - The Fund may not be able to precisely track the performance of the Benchmark Index. Unlike the Fund, the performance of the Benchmark Index is not impacted by fees and expenses, including trading costs associated with implementing portfolio changes. In addition, the Fund may own less than all the securities of the Benchmark Index, which also may cause a variance between the performance of the Fund and the performance of the Benchmark Index. Tracking error risk may cause the Fund’s performance to be less than expected.
Empower SP Mid Cap 400 Index Fund | Real Estate Investment Trust Real Estate Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Real Estate Investment Trust/Real Estate Risk - The Benchmark Index includes real estate investment trusts (“REITs”). Investments in real estate-related instruments may be affected by similar risks as direct investment in real estate and the real estate market generally, including, among others: economic, legal, cultural, governmental, environmental or technological factors that affect property values, rents or occupancies of real estate. Historically, the real estate industry has been cyclical and particularly sensitive to economic downturns and other events that limit demand for real estate, which would adversely impact the value of real estate investments. Real estate companies, including REITs or similar structures, tend to be small and mid cap companies, which means their shares may be more volatile and less liquid. REITs and real estate-related companies may not be diversified due to ownership of a limited number of properties or concentration in a particular geographic region or property type. REITs are also subject to risks associated with changes in interest rates.
Empower SP Mid Cap 400 Index Fund | Derivatives Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Derivatives Risk - The use of derivatives, including but not limited to futures contracts on the Benchmark Index and options on futures contracts, may expose the Fund to additional risks that it would not be subject to if it invested directly in the securities underlying those derivatives. These risks include imperfect correlations with underlying investments or the Fund’s other portfolio holdings, magnified losses resulting from leverage, counterparty risk, high price volatility, liquidity risk, segregation risk, valuation risk and legal restrictions.
Empower SP Mid Cap 400 Index Fund | Management Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Management Risk - A strategy, investment decision, technique, analysis, or model used by the portfolio managers may fail to produce the intended results or imperfections, errors or limitations in the tools and data used by the portfolio managers may cause unintended results. Therefore, the Fund could underperform in comparison to other funds with similar objectives and investment strategies and may generate losses even in a favorable market.
Empower SP Mid Cap 400 Index Fund | Institutional  
Risk Return Abstract rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 0.17%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Shareholder Services Fees rr_Component1OtherExpensesOverAssets none
Other Expenses rr_Component2OtherExpensesOverAssets 0.01%
Total Other Expenses rr_OtherExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.18%
Fee Waiver and Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets none [1]
Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement rr_NetExpensesOverAssets 0.18%
1 Year rr_ExpenseExampleYear01 $ 18
3 Years rr_ExpenseExampleYear03 58
5 Years rr_ExpenseExampleYear05 101
10 Years rr_ExpenseExampleYear10 $ 230
OneYear rr_AverageAnnualReturnYear01 13.62%
FiveYears rr_AverageAnnualReturnYear05 10.11%
TenYears rr_AverageAnnualReturnYear10
SinceInception rr_AverageAnnualReturnSinceInception 9.39%
InceptionDate rr_AverageAnnualReturnInceptionDate May 01, 2015
Empower SP Mid Cap 400 Index Fund | Investor  
Risk Return Abstract rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 0.17%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Shareholder Services Fees rr_Component1OtherExpensesOverAssets 0.35%
Other Expenses rr_Component2OtherExpensesOverAssets 0.02%
Total Other Expenses rr_OtherExpensesOverAssets 0.37%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.54%
Fee Waiver and Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets none [1]
Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement rr_NetExpensesOverAssets 0.54%
1 Year rr_ExpenseExampleYear01 $ 55
3 Years rr_ExpenseExampleYear03 173
5 Years rr_ExpenseExampleYear05 302
10 Years rr_ExpenseExampleYear10 $ 677
2015 rr_AnnualReturn2015 (2.77%)
2016 rr_AnnualReturn2016 19.96%
2017 rr_AnnualReturn2017 15.64%
2018 rr_AnnualReturn2018 (11.56%)
2019 rr_AnnualReturn2019 25.49%
2020 rr_AnnualReturn2020 13.10%
2021 rr_AnnualReturn2021 24.01%
2022 rr_AnnualReturn2022 (13.55%)
2023 rr_AnnualReturn2023 15.76%
2024 rr_AnnualReturn2024 13.27%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel <span style="color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:bold;margin-left:0.0pt;">Best Quarter</span>
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Dec. 31, 2020
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 24.20%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel <span style="color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:bold;margin-left:0.0pt;">Worst Quarter</span>
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (29.73%)
OneYear rr_AverageAnnualReturnYear01 13.27%
FiveYears rr_AverageAnnualReturnYear05 9.72%
TenYears rr_AverageAnnualReturnYear10 9.06%
SinceInception rr_AverageAnnualReturnSinceInception
Empower SP Mid Cap 400 Index Fund | L  
Risk Return Abstract rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 0.17%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Shareholder Services Fees rr_Component1OtherExpensesOverAssets 0.35%
Other Expenses rr_Component2OtherExpensesOverAssets 0.05%
Total Other Expenses rr_OtherExpensesOverAssets 0.40%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.82%
Fee Waiver and Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets 0.02% [1]
Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement rr_NetExpensesOverAssets 0.80%
1 Year rr_ExpenseExampleYear01 $ 82
3 Years rr_ExpenseExampleYear03 260
5 Years rr_ExpenseExampleYear05 453
10 Years rr_ExpenseExampleYear10 $ 1,012
OneYear rr_AverageAnnualReturnYear01 12.97%
FiveYears rr_AverageAnnualReturnYear05 9.51%
TenYears rr_AverageAnnualReturnYear10
SinceInception rr_AverageAnnualReturnSinceInception 9.01%
InceptionDate rr_AverageAnnualReturnInceptionDate Apr. 07, 2017
Empower SP Mid Cap 400 Index Fund | Russell 3000® Index (reflects no deduction for fees, expenses or taxes)  
Risk Return Abstract rr_RiskReturnAbstract  
OneYear rr_AverageAnnualReturnYear01 23.81%
FiveYears rr_AverageAnnualReturnYear05 13.86%
TenYears rr_AverageAnnualReturnYear10 12.55%
SinceInception rr_AverageAnnualReturnSinceInception 12.74%
Empower SP Mid Cap 400 Index Fund | Russell 3000® Index (reflects no deduction for fees, expenses or taxes) | L  
Risk Return Abstract rr_RiskReturnAbstract  
OneYear rr_AverageAnnualReturnYear01 23.81%
FiveYears rr_AverageAnnualReturnYear05 13.86%
TenYears rr_AverageAnnualReturnYear10
SinceInception rr_AverageAnnualReturnSinceInception 13.86%
Empower SP Mid Cap 400 Index Fund | S&P MidCap 400® Index (reflects no deduction for fees, expenses or taxes)  
Risk Return Abstract rr_RiskReturnAbstract  
OneYear rr_AverageAnnualReturnYear01 13.93%
FiveYears rr_AverageAnnualReturnYear05 10.34%
TenYears rr_AverageAnnualReturnYear10 9.68%
SinceInception rr_AverageAnnualReturnSinceInception 9.61%
Empower SP Mid Cap 400 Index Fund | S&P MidCap 400® Index (reflects no deduction for fees, expenses or taxes) | L  
Risk Return Abstract rr_RiskReturnAbstract  
OneYear rr_AverageAnnualReturnYear01 13.93%
FiveYears rr_AverageAnnualReturnYear05 10.34%
TenYears rr_AverageAnnualReturnYear10
SinceInception rr_AverageAnnualReturnSinceInception 9.83%
[1] The investment adviser has contractually agreed to waive management fees or reimburse expenses if Total Annual Fund Operating Expenses of any Class exceed 0.20% of the Class's average daily net assets, excluding Distribution and Service (12b-1) Fees, Shareholder Services Fees, brokerage expenses, taxes, dividend interest on short sales, interest expenses, and any extraordinary expenses, including litigation costs (the “Expense Limit”). The agreement’s current term ends on April 30, 2026, and automatically renews for one-year terms unless it is terminated upon termination of the investment advisory agreement or by Empower Funds or the investment adviser upon written notice within 90 days of the end of the current term. Under the agreement, the investment adviser may recoup, subject to the approval of the Board of Directors of Empower Funds, these waivers and reimbursements in future periods, not exceeding three years following the particular waiver/reimbursement, provided Total Annual Fund Operating Expenses of the Class plus such recoupment do not exceed the lesser of the Expense Limit that was in place at the time of the waiver/reimbursement or the Expense Limit in place at the time of recoupment.