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EQUITY (Details - Rollforward of Accumulated other comprehensive income) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
A rollforward of Accumulated Other Comprehensive Income (Loss)    
Balance, beginning of period, net of tax $ 10,617us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax  
Change in unrealized appreciation (depreciation) of investments 1,030us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax 2,959us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax
Change in unrealized appreciation (depreciation) of investments (101)us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest 81us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest
Changes in foreign currency translation adjustments (632)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax (102)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax
Less: Income tax expense (benefit) 291us-gaap_OtherComprehensiveIncomeLossTax 215us-gaap_OtherComprehensiveIncomeLossTax
Deferred tax asset (liability) (29)us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossTaxIncludingPortionAttributableToNoncontrollingInterest (8)us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossTaxIncludingPortionAttributableToNoncontrollingInterest
Deferred tax asset (liability) 491us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax 174us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax
Deferred tax asset (liability) (173)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax 56us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax
Deferred tax asset (liability) 2us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax (7)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax
Other comprehensive income (loss) 37us-gaap_OtherComprehensiveIncomeLossNetOfTax 2,725us-gaap_OtherComprehensiveIncomeLossNetOfTax
Other comprehensive income (loss) (72)us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxIncludingPortionAttributableToNoncontrollingInterest 89us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
Other comprehensive income (loss) 539us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax 2,785us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax
Other comprehensive income (loss) (459)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax (158)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Other comprehensive income (loss) 29us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax 9us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
Balance, end of period, net of tax 10,657us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax  
Accumulated Other Comprehensive Income (Loss)    
A rollforward of Accumulated Other Comprehensive Income (Loss)    
Balance, beginning of period, net of tax 10,617us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
6,360us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
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= us-gaap_AccumulatedOtherComprehensiveIncomeMember
Change in unrealized appreciation (depreciation) of investments 1,271aig_OtherComprehensiveIncomeAvailableForSaleSecuritiesAdjustmentBeforeTaxPeriodIncreaseDecreaseExcludingReclassificationsToDeferredAcquisitionCost
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3,939aig_OtherComprehensiveIncomeAvailableForSaleSecuritiesAdjustmentBeforeTaxPeriodIncreaseDecreaseExcludingReclassificationsToDeferredAcquisitionCost
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Change in deferred acquisition costs adjustment and other 61aig_OtherComprehensiveIncomeDeferredAcquisitionCostAndOtherAdjustmentsBeforeTaxPeriodIncreaseDecrease
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(224)aig_OtherComprehensiveIncomeDeferredAcquisitionCostAndOtherAdjustmentsBeforeTaxPeriodIncreaseDecrease
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= us-gaap_AccumulatedOtherComprehensiveIncomeMember
Change in future policy benefits (403)aig_OtherComprehensiveIncomeUnrealizedGainLossOnFuturePolicyBenefitReservesNetOfOffsetInDeferredAcquisitionCosts
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
(675)aig_OtherComprehensiveIncomeUnrealizedGainLossOnFuturePolicyBenefitReservesNetOfOffsetInDeferredAcquisitionCosts
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= us-gaap_AccumulatedOtherComprehensiveIncomeMember
Changes in foreign currency translation adjustments (632)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
(102)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax
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= us-gaap_AccumulatedOtherComprehensiveIncomeMember
Net actuarial gain (loss) 43aig_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetGainLossBeforeTax
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= us-gaap_AccumulatedOtherComprehensiveIncomeMember
14aig_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetGainLossBeforeTax
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= us-gaap_AccumulatedOtherComprehensiveIncomeMember
Prior service (cost) credit (12)aig_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostBeforeTax
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= us-gaap_AccumulatedOtherComprehensiveIncomeMember
(12)aig_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostBeforeTax
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= us-gaap_AccumulatedOtherComprehensiveIncomeMember
Less: Income tax expense (benefit) (291)us-gaap_OtherComprehensiveIncomeLossTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
(215)us-gaap_OtherComprehensiveIncomeLossTax
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= us-gaap_AccumulatedOtherComprehensiveIncomeMember
Other comprehensive income (loss) 37us-gaap_OtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
2,725us-gaap_OtherComprehensiveIncomeLossNetOfTax
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= us-gaap_AccumulatedOtherComprehensiveIncomeMember
Noncontrolling interests (3)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest
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= us-gaap_AccumulatedOtherComprehensiveIncomeMember
0us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest
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Balance, end of period, net of tax 10,657us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
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= us-gaap_AccumulatedOtherComprehensiveIncomeMember
9,085us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
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= us-gaap_AccumulatedOtherComprehensiveIncomeMember
Unrealized Appreciation (Depreciation) of Fixed Maturity Investments on Which Other-Than-Temporary Credit Impairments    
A rollforward of Accumulated Other Comprehensive Income (Loss)    
Balance, beginning of period, net of tax 1,043us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
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936us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
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Change in unrealized appreciation (depreciation) of investments (59)us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember
136us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember
Change in deferred acquisition costs adjustment and other (19)aig_OtherComprehensiveIncomeDeferredAcquisitionCostAndOtherAdjustmentsBeforeTaxPeriodIncreaseDecrease
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember
32aig_OtherComprehensiveIncomeDeferredAcquisitionCostAndOtherAdjustmentsBeforeTaxPeriodIncreaseDecrease
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= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember
Change in future policy benefits (23)aig_OtherComprehensiveIncomeUnrealizedGainLossOnFuturePolicyBenefitReservesNetOfOffsetInDeferredAcquisitionCosts
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember
(87)aig_OtherComprehensiveIncomeUnrealizedGainLossOnFuturePolicyBenefitReservesNetOfOffsetInDeferredAcquisitionCosts
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember
Deferred tax asset (liability) 29us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossTaxIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember
8us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossTaxIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember
Other comprehensive income (loss) (72)us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember
89us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
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= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember
Balance, end of period, net of tax 971us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
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= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember
1,025us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember
Unrealized Appreciation (Depreciation) of All Other Investments    
A rollforward of Accumulated Other Comprehensive Income (Loss)    
Balance, beginning of period, net of tax 12,327us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember
6,789us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember
Change in unrealized appreciation (depreciation) of investments 1,330us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember
3,803us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax
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= us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember
Change in deferred acquisition costs adjustment and other 80aig_OtherComprehensiveIncomeDeferredAcquisitionCostAndOtherAdjustmentsBeforeTaxPeriodIncreaseDecrease
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember
(256)aig_OtherComprehensiveIncomeDeferredAcquisitionCostAndOtherAdjustmentsBeforeTaxPeriodIncreaseDecrease
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember
Change in future policy benefits (380)aig_OtherComprehensiveIncomeUnrealizedGainLossOnFuturePolicyBenefitReservesNetOfOffsetInDeferredAcquisitionCosts
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember
(588)aig_OtherComprehensiveIncomeUnrealizedGainLossOnFuturePolicyBenefitReservesNetOfOffsetInDeferredAcquisitionCosts
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember
Deferred tax asset (liability) (491)us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax
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= us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember
(174)us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax
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Other comprehensive income (loss) 539us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax
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2,785us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax
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Noncontrolling interests 0us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest
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= us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember
0us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember
Balance, end of period, net of tax 12,866us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
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= us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember
9,574us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember
Foreign Currency Translation Adjustments    
A rollforward of Accumulated Other Comprehensive Income (Loss)    
Balance, beginning of period, net of tax (1,784)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedTranslationAdjustmentMember
(952)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
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Changes in foreign currency translation adjustments (632)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax
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(102)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax
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Deferred tax asset (liability) 173us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax
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(56)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax
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Other comprehensive income (loss) (459)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
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(158)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
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Noncontrolling interests (3)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest
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0us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest
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Balance, end of period, net of tax (2,240)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
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(1,110)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
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Change in Retirement Plan Liabilities Adjustment    
A rollforward of Accumulated Other Comprehensive Income (Loss)    
Balance, beginning of period, net of tax (969)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
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(413)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
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Net actuarial gain (loss) 43aig_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetGainLossBeforeTax
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14aig_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetGainLossBeforeTax
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Prior service (cost) credit (12)aig_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostBeforeTax
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(12)aig_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostBeforeTax
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Deferred tax asset (liability) (2)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax
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7us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax
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Other comprehensive income (loss) 29us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
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9us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
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Balance, end of period, net of tax $ (940)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
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$ (404)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
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