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Income Taxes Income Tax Expense (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Current |  |  |
Federal | $ 94 us-gaap_CurrentFederalTaxExpenseBenefit | $ 78 us-gaap_CurrentFederalTaxExpenseBenefit | $ 50 us-gaap_CurrentFederalTaxExpenseBenefit
State and local | 8 us-gaap_CurrentStateAndLocalTaxExpenseBenefit | 10 us-gaap_CurrentStateAndLocalTaxExpenseBenefit | 9 us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Foreign | 27 us-gaap_CurrentForeignTaxExpenseBenefit | 26 us-gaap_CurrentForeignTaxExpenseBenefit | 23 us-gaap_CurrentForeignTaxExpenseBenefit
Deferred |  |  |
Federal | 1 us-gaap_DeferredFederalIncomeTaxExpenseBenefit | 18 us-gaap_DeferredFederalIncomeTaxExpenseBenefit | 72 us-gaap_DeferredFederalIncomeTaxExpenseBenefit
State and local | 0 us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit | 2 us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit | 7 us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
Foreign | (3)us-gaap_DeferredForeignIncomeTaxExpenseBenefit | (3)us-gaap_DeferredForeignIncomeTaxExpenseBenefit | (2)us-gaap_DeferredForeignIncomeTaxExpenseBenefit
Total income tax expense | $ 127 us-gaap_IncomeTaxExpenseBenefit | $ 131 us-gaap_IncomeTaxExpenseBenefit | $ 159 us-gaap_IncomeTaxExpenseBenefit
Effective Income Tax Rate Reconciliation, Percent | 25.70%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 25.80%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 27.50%us-gaap_EffectiveIncomeTaxRateContinuingOperations

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