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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	$ 94us-gaap_CurrentFederalTaxExpenseBenefit	$ 78us-gaap_CurrentFederalTaxExpenseBenefit	$ 50us-gaap_CurrentFederalTaxExpenseBenefit
State and local	8us-gaap_CurrentStateAndLocalTaxExpenseBenefit	10us-gaap_CurrentStateAndLocalTaxExpenseBenefit	9us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Foreign	27us-gaap_CurrentForeignTaxExpenseBenefit	26us-gaap_CurrentForeignTaxExpenseBenefit	23us-gaap_CurrentForeignTaxExpenseBenefit
Deferred
Federal	1us-gaap_DeferredFederalIncomeTaxExpenseBenefit	18us-gaap_DeferredFederalIncomeTaxExpenseBenefit	72us-gaap_DeferredFederalIncomeTaxExpenseBenefit
State and local	0us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit	2us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit	7us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
Foreign	(3)us-gaap_DeferredForeignIncomeTaxExpenseBenefit	(3)us-gaap_DeferredForeignIncomeTaxExpenseBenefit	(2)us-gaap_DeferredForeignIncomeTaxExpenseBenefit
Total income tax expense	$ 127us-gaap_IncomeTaxExpenseBenefit	$ 131us-gaap_IncomeTaxExpenseBenefit	$ 159us-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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Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

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