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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Document Type dei_DocumentType Other
Document Period End Date dei_DocumentPeriodEndDate Jul. 08, 2014
Registrant Name dei_EntityRegistrantName GREAT-WEST FUNDS INC
Central Index Key dei_EntityCentralIndexKey 0000356476
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate Jul. 08, 2014
Document Effective Date dei_DocumentEffectiveDate Jul. 08, 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 Aggressive Profile I Fund
(the “Fund”)
Initial Class and Class L Shares
Supplement dated July 8, 2014 to the Prospectus and Summary Prospectus for the
Fund, each dated May 1, 2014
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.”
GREAT-WEST FUNDS INC | Great-West Aggressive Profile I Fund
  
Risk/Return: rr_RiskReturnAbstract  
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns for the Periods Ended December 31, 2013
GREAT-WEST FUNDS INC | Great-West Aggressive Profile I Fund | Wilshire 5000 Index
  
Risk/Return: rr_RiskReturnAbstract  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes reflects no deduction for fees, expenses or taxes
Label rr_AverageAnnualReturnLabel Wilshire 5000 Index (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 33.06%
5 Years rr_AverageAnnualReturnYear05 18.58%
10 Years rr_AverageAnnualReturnYear10 7.97%
GREAT-WEST FUNDS INC | Great-West Aggressive Profile I Fund | Composite Index
  
Risk/Return: rr_RiskReturnAbstract  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes reflects no deduction for fees, expenses or taxes
Label rr_AverageAnnualReturnLabel Composite Index (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 29.33%
5 Years rr_AverageAnnualReturnYear05 16.79%
10 Years rr_AverageAnnualReturnYear10 7.75%
GREAT-WEST FUNDS INC | Great-West Aggressive Profile I Fund | Great-West Aggressive Profile I Fund Initial Class
  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Great-West Aggressive Profile I Fund Initial Class
1 Year rr_AverageAnnualReturnYear01 28.85%
5 Years rr_AverageAnnualReturnYear05 17.13%
10 Years rr_AverageAnnualReturnYear10 7.60%