Income Taxes - Components of Consolidated Income Taxes (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current:
United States - Federal	$ 718us-gaap_CurrentFederalTaxExpenseBenefit	$ 682us-gaap_CurrentFederalTaxExpenseBenefit	$ 698us-gaap_CurrentFederalTaxExpenseBenefit
United States - State	51	60	53
Outside United States	1,380us-gaap_CurrentForeignTaxExpenseBenefit	1,211us-gaap_CurrentForeignTaxExpenseBenefit	1,025us-gaap_CurrentForeignTaxExpenseBenefit
Current Income Tax Expense (Benefit), Total	2,149us-gaap_CurrentIncomeTaxExpenseBenefit	1,953us-gaap_CurrentIncomeTaxExpenseBenefit	1,776us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred:
United States - Federal	(194)	(109)	(105)
United States - State	(9)	(4)	(7)
Outside United States	(12)	34	22
Valuation allowance	(6)	(26)	14
Deferred income taxes	(221)us-gaap_DeferredIncomeTaxExpenseBenefit	(105)us-gaap_DeferredIncomeTaxExpenseBenefit	(76)us-gaap_DeferredIncomeTaxExpenseBenefit
Consolidated taxes on income	$ 1,928us-gaap_IncomeTaxExpenseBenefit	$ 1,848us-gaap_IncomeTaxExpenseBenefit	$ 1,700us-gaap_IncomeTaxExpenseBenefit

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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