2.3.0.15 Html 34 155 1 false 6 0 false 3 true false R1.htm 0010 - Statement - Condensed Consolidated Balance Sheets Sheet http://www.greatwest.com/role/BalanceSheet Condensed Consolidated Balance Sheets false false R2.htm 0015 - Statement - Condensed Consolidated Balance Sheets (Parenthetical) Sheet http://www.greatwest.com/role/BalanceSheetParenthetical Condensed Consolidated Balance Sheets (Parenthetical) false false R3.htm 0020 - Statement - Condensed Consolidated Statements of Income Sheet http://www.greatwest.com/role/StatementOfIncome Condensed Consolidated Statements of Income false false R4.htm 0025 - Statement - Condensed Consolidated Statements of Income (Parenthetical) Sheet http://www.greatwest.com/role/StatementOfIncomeParenthetical Condensed Consolidated Statements of Income (Parenthetical) false false R5.htm 0030 - Statement - Condensed Consolidated Statements of Stockholder's Equity Sheet http://www.greatwest.com/role/StatementOfStockholdersEquity Condensed Consolidated Statements of Stockholder's Equity false false R6.htm 0040 - Statement - Condensed Consolidated Statements of Cash Flows Sheet http://www.greatwest.com/role/CashFlows Condensed Consolidated Statements of Cash Flows false false R7.htm 1010 - Disclosure - Organization and Basis of Presentation Sheet http://www.greatwest.com/role/DisclosureOrganizationAndBasisOfPresentation Organization and Basis of Presentation false false R8.htm 1020 - Disclosure - Application of Recent Accounting Pronouncements Sheet http://www.greatwest.com/role/DisclosureApplicationOfRecentAccountingPronouncements Application of Recent Accounting Pronouncements false false R9.htm 1030 - Disclosure - Related Party Transactions Sheet http://www.greatwest.com/role/DisclosureRelatedPartyTransactions Related Party Transactions false false R10.htm 1040 - Disclosure - Summary of Investments Sheet http://www.greatwest.com/role/DisclosureSummaryOfInvestments Summary of Investments false false R11.htm 1050 - Disclosure - Derivative Financial Instruments Sheet http://www.greatwest.com/role/DisclosureDerivativeFinancialInstruments Derivative Financial Instruments false false R12.htm 1060 - Disclosure - Fair Value Measurements Sheet http://www.greatwest.com/role/DisclosureFairValueMeasurements Fair Value Measurements false false R13.htm 1070 - Disclosure - Goodwill and Other Intangible Assets Sheet http://www.greatwest.com/role/DisclosureGoodwillAndOtherIntangibleAssets Goodwill and Other Intangible Assets false false R14.htm 1080 - Disclosure - Other Comprehensive Income Sheet http://www.greatwest.com/role/DisclosureOtherComprehensiveIncome Other Comprehensive Income false false R15.htm 1090 - Disclosure - Components of Net Periodic (Benefit) Cost Sheet http://www.greatwest.com/role/DisclosureComponentsOfNetPeriodicBenefitCost Components of Net Periodic (Benefit) Cost false false R16.htm 1100 - Disclosure - Federal Income Taxes Sheet http://www.greatwest.com/role/DisclosureFederalIncomeTaxes Federal Income Taxes false false R17.htm 1110 - Disclosure - Segment Information Sheet http://www.greatwest.com/role/DisclosureSegmentInformation Segment Information false false R18.htm 1120 - Disclosure - Share-Based Compensation Sheet http://www.greatwest.com/role/DisclosureShareBasedCompensation Share-Based Compensation false false R19.htm 1130 - Disclosure - Commitments and Contingencies Sheet http://www.greatwest.com/role/DisclosureCommitmentsAndContingencies Commitments and Contingencies false false R20.htm 1140 - Disclosure - Subsequent Event Sheet http://www.greatwest.com/role/DisclosureSubsequentEvent Subsequent Event false false R21.htm 9999 - Document - Document and Entity Information Sheet http://www.greatwest.com/role/DocumentAndEntityInformation Document and Entity Information false false All Reports Book All Reports Process Flow-Through: 0010 - Statement - Condensed Consolidated Balance Sheets Process Flow-Through: Removing column 'Sep. 30, 2010' Process Flow-Through: Removing column 'Dec. 31, 2009' Process Flow-Through: 0015 - Statement - Condensed Consolidated Balance Sheets (Parenthetical) Process Flow-Through: 0020 - Statement - Condensed Consolidated Statements of Income Process Flow-Through: Removing column '12 Months Ended Dec. 31, 2010' Process Flow-Through: 0025 - Statement - Condensed Consolidated Statements of Income (Parenthetical) Process Flow-Through: 0040 - Statement - Condensed Consolidated Statements of Cash Flows Process Flow-Through: Removing column '12 Months Ended Dec. 31, 2010' gac-20110930.xml gac-20110930.xsd gac-20110930_cal.xml gac-20110930_def.xml gac-20110930_lab.xml gac-20110930_pre.xml true true