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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Document Type dei_DocumentType Other
Document Period End Date dei_DocumentPeriodEndDate Dec. 31, 2013
Registrant Name dei_EntityRegistrantName GREAT-WEST FUNDS INC
Central Index Key dei_EntityCentralIndexKey 0000356476
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate May 12, 2014
Document Effective Date dei_DocumentEffectiveDate May 12, 2014
Prospectus Date rr_ProspectusDate May 01, 2014
GREAT-WEST FUNDS INC
  
Risk/Return: rr_RiskReturnAbstract  
Supplement [Text Block] cik0000356476_SupplementTextBlock
GREAT-WEST FUNDS, INC.
Great-West SecureFoundation® Balanced ETF Fund
Class A Ticker: SFBPX
(the “Fund”)
Supplement dated May 12, 2014 to the Prospectus and Summary Prospectus for the
Fund, each dated May 1, 2014
GREAT-WEST FUNDS INC | Great-West SecureFoundation Balanced ETF Fund
  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Great-West SecureFoundation® Balanced ETF Fund
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Effective immediately, the table titled “Average Annual Total Returns for the Periods Ended December 31, 2013” in the Prospectus and Summary Prospectus for the Fund is hereby deleted in its entirety and replaced with the following table titled “Average Annual Total Returns for the Periods Ended December 31, 2013.”
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns for the Periods Ended December 31, 2013
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock
1 After-tax returns are calculated using the historical highest individual Federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown do not apply to investors who hold Fund shares through tax-deferred arrangements, such as 401(k) plans or an individual retirement account (IRA).
GREAT-WEST FUNDS INC | Great-West SecureFoundation Balanced ETF Fund | Wilshire 5000 Index
  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Wilshire 5000 Index (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 33.06%
Since Inception rr_AverageAnnualReturnSinceInception 22.03%
Inception Date rr_AverageAnnualReturnInceptionDate Jan. 23, 2012
GREAT-WEST FUNDS INC | Great-West SecureFoundation Balanced ETF Fund | Barclays U.S. Aggregate Bond Index
  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Barclays U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 (2.02%)
Since Inception rr_AverageAnnualReturnSinceInception 1.13%
Inception Date rr_AverageAnnualReturnInceptionDate Jan. 23, 2012
GREAT-WEST FUNDS INC | Great-West SecureFoundation Balanced ETF Fund | Composite Index
  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Composite Index (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 16.99%
Since Inception rr_AverageAnnualReturnSinceInception 13.16%
Inception Date rr_AverageAnnualReturnInceptionDate Jan. 23, 2012
GREAT-WEST FUNDS INC | Great-West SecureFoundation Balanced ETF Fund | Great-West SecureFoundation Balanced ETF Fund Class A
  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Class A before taxes
1 Year rr_AverageAnnualReturnYear01 9.74%
Since Inception rr_AverageAnnualReturnSinceInception 9.65%
Inception Date rr_AverageAnnualReturnInceptionDate Jan. 23, 2012
GREAT-WEST FUNDS INC | Great-West SecureFoundation Balanced ETF Fund | Great-West SecureFoundation Balanced ETF Fund Class A | After Taxes on Distributions
  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Class A after taxes on distributions1
1 Year rr_AverageAnnualReturnYear01 9.27%
Since Inception rr_AverageAnnualReturnSinceInception 9.15%
Inception Date rr_AverageAnnualReturnInceptionDate Jan. 23, 2012
GREAT-WEST FUNDS INC | Great-West SecureFoundation Balanced ETF Fund | Great-West SecureFoundation Balanced ETF Fund Class A | After Taxes on Distributions and Sales
  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Class A after taxes on distributions and sale of fund shares1
1 Year rr_AverageAnnualReturnYear01 6.28%
Since Inception rr_AverageAnnualReturnSinceInception 7.54%
Inception Date rr_AverageAnnualReturnInceptionDate Jan. 23, 2012