XML 83 R59.htm IDEA: XBRL DOCUMENT v2.4.1.9
Investments (Net Realized Gains (Losses) And Losses Included In Net Realized Gains (Losses) And Other Comprehensive Income) (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Investments, Debt and Equity Securities [Abstract]                      
OTTI on fixed maturities, gross                 $ (64)ace_FixedMaturitiesOtherThanTemporaryImpairmentsGross $ (18)ace_FixedMaturitiesOtherThanTemporaryImpairmentsGross $ (26)ace_FixedMaturitiesOtherThanTemporaryImpairmentsGross
OTTI on fixed maturities recognized in OCI (pre-tax)                 7ace_FixedMaturitiesOtherThanTemporaryImpairmentsInOtherComprehensiveIncomePreTax 0ace_FixedMaturitiesOtherThanTemporaryImpairmentsInOtherComprehensiveIncomePreTax 1ace_FixedMaturitiesOtherThanTemporaryImpairmentsInOtherComprehensiveIncomePreTax
OTTI on fixed maturities, net                 (57)ace_FixedMaturitiesOtherThanTemporaryImpairmentsNet (18)ace_FixedMaturitiesOtherThanTemporaryImpairmentsNet (25)ace_FixedMaturitiesOtherThanTemporaryImpairmentsNet
Fixed maturities, Gross realized gains excluding OTTI                 213ace_FixedMaturitiesGrossRealizedGainsExcludingOtherThanTemporaryImpairments 237ace_FixedMaturitiesGrossRealizedGainsExcludingOtherThanTemporaryImpairments 388ace_FixedMaturitiesGrossRealizedGainsExcludingOtherThanTemporaryImpairments
Fixed maturities, Gross realized losses excluding OTTI                 (133)ace_FixedMaturitiesGrossRealizedLossesExcludingOtherThanTemporaryImpairments (129)ace_FixedMaturitiesGrossRealizedLossesExcludingOtherThanTemporaryImpairments (133)ace_FixedMaturitiesGrossRealizedLossesExcludingOtherThanTemporaryImpairments
Total fixed maturities                 23ace_FixedMaturitiesNetRealizedGainsLossesTotal 90ace_FixedMaturitiesNetRealizedGainsLossesTotal 230ace_FixedMaturitiesNetRealizedGainsLossesTotal
OTTI on equity securities                 (8)us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment (2)us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment (5)us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment
Equity securities, Gross realized gains excluding OTTI                 22ace_EquitySecuritiesGrossRealizedGainsExcludingOtherThanTemporaryImpairments 21ace_EquitySecuritiesGrossRealizedGainsExcludingOtherThanTemporaryImpairments 11ace_EquitySecuritiesGrossRealizedGainsExcludingOtherThanTemporaryImpairments
Equity securities, Gross realized losses excluding OTTI                 (61)ace_EquitySecuritiesGrossRealizedLossesExcludingOtherThanTemporaryImpairments (4)ace_EquitySecuritiesGrossRealizedLossesExcludingOtherThanTemporaryImpairments (2)ace_EquitySecuritiesGrossRealizedLossesExcludingOtherThanTemporaryImpairments
Total equity securities                 (47)ace_EquitySecuritiesNetRealizedGainsLossesTotal 15ace_EquitySecuritiesNetRealizedGainsLossesTotal 4ace_EquitySecuritiesNetRealizedGainsLossesTotal
OTTI on other investments                 (3)ace_OtherInvestmentsOtherThanTemporaryImpairments (2)ace_OtherInvestmentsOtherThanTemporaryImpairments (7)ace_OtherInvestmentsOtherThanTemporaryImpairments
Foreign exchange losses                 (40)us-gaap_ForeignCurrencyTransactionGainLossBeforeTax 29us-gaap_ForeignCurrencyTransactionGainLossBeforeTax (16)us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
Investment and embedded derivative instruments                 (107)ace_InvestmentAndEmbeddedDerivativeInstrumentsGainsLosses 78ace_InvestmentAndEmbeddedDerivativeInstrumentsGainsLosses (6)ace_InvestmentAndEmbeddedDerivativeInstrumentsGainsLosses
Fair value adjustments on insurance derivative                 (217)ace_FairValueAdjustmentsOnInsuranceDerivativeGainsLosses 878ace_FairValueAdjustmentsOnInsuranceDerivativeGainsLosses 171ace_FairValueAdjustmentsOnInsuranceDerivativeGainsLosses
S&P put options and futures                 (168)ace_StandardAndPoorsPutOptionsAndFuturesGainsLosses (579)ace_StandardAndPoorsPutOptionsAndFuturesGainsLosses (297)ace_StandardAndPoorsPutOptionsAndFuturesGainsLosses
Other derivative instruments                 50ace_OtherDerivativeInstrumentsGainsLosses (2)ace_OtherDerivativeInstrumentsGainsLosses (4)ace_OtherDerivativeInstrumentsGainsLosses
Other                 2ace_OtherRealizedGainsLosses (3)ace_OtherRealizedGainsLosses 3ace_OtherRealizedGainsLosses
Total net realized gains (losses) (210)ace_NetRealizedGainsLosses (120)ace_NetRealizedGainsLosses (73)ace_NetRealizedGainsLosses (104)ace_NetRealizedGainsLosses 154ace_NetRealizedGainsLosses 40ace_NetRealizedGainsLosses 104ace_NetRealizedGainsLosses 206ace_NetRealizedGainsLosses (507)ace_NetRealizedGainsLosses 504ace_NetRealizedGainsLosses 78ace_NetRealizedGainsLosses
Change in net unrealized appreciation (depreciation) on investments, Fixed maturities available for sale                 734ace_ChangeInNetUnrealizedAppreciationDepreciationFixedMaturitiesAvailableForSale (1,798)ace_ChangeInNetUnrealizedAppreciationDepreciationFixedMaturitiesAvailableForSale 1,099ace_ChangeInNetUnrealizedAppreciationDepreciationFixedMaturitiesAvailableForSale
Change in net unrealized appreciation (depreciation) on investments, Fixed maturities held to maturity                 (2)ace_ChangeInNetUnrealizedAppreciationDepreciationFixedMaturitiesHeldToMaturity (82)ace_ChangeInNetUnrealizedAppreciationDepreciationFixedMaturitiesHeldToMaturity (94)ace_ChangeInNetUnrealizedAppreciationDepreciationFixedMaturitiesHeldToMaturity
Change in net unrealized appreciation (depreciation) on investments, Equity securities                 77ace_ChangeInNetUnrealizedAppreciationDepreciationEquities (41)ace_ChangeInNetUnrealizedAppreciationDepreciationEquities 61ace_ChangeInNetUnrealizedAppreciationDepreciationEquities
Change in net unrealized appreciation (depreciation) on investments, Other                 35ace_ChangeInNetUnrealizedAppreciationDepreciationOtherInvestments 54ace_ChangeInNetUnrealizedAppreciationDepreciationOtherInvestments 50ace_ChangeInNetUnrealizedAppreciationDepreciationOtherInvestments
Change in net unrealized appreciation (depreciation) on investments, Income tax expense                 (167)ace_ChangeInNetUnrealizedAppreciationDepreciationIncomeTaxExpenseBenefit 408ace_ChangeInNetUnrealizedAppreciationDepreciationIncomeTaxExpenseBenefit (198)ace_ChangeInNetUnrealizedAppreciationDepreciationIncomeTaxExpenseBenefit
Change in net unrealized appreciation on investments,                 677ace_ChangeInNetUnrealizedAppreciationDepreciation (1,459)ace_ChangeInNetUnrealizedAppreciationDepreciation 918ace_ChangeInNetUnrealizedAppreciationDepreciation
Total net realized gains (losses) and change in net unrealized appreciation (depreciation) on investments                 $ 170ace_NetRealizedGainsLossesAndChangeInNetUnrealizedAppreciationDepreciation $ (955)ace_NetRealizedGainsLossesAndChangeInNetUnrealizedAppreciationDepreciation $ 996ace_NetRealizedGainsLossesAndChangeInNetUnrealizedAppreciationDepreciation