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Tax - Difference Between Effective Tax Rate (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Tax Disclosure [Abstract]
Federal income tax at U.S. federal statutory rate	$ 344	$ 301	$ 932	$ 783
Foreign income tax rate differential	(91)	(50)	(189)	(172)
State income tax, net of federal benefit	8	5	23	17
Nondeductible expenses	1	4	20	20
Tax benefit of manufacturing deduction	(13)	(4)	(31)	(20)
Foreign dividends, net of foreign tax credits	113	12	134	24
Tax impact of foreign exchange	16	(12)	14	27
Tax rate change on temporary differences		(16)		(16)
Change in valuation allowance	(94)	32	(92)	40
Other	(1)	(9)	(5)	(17)
Provision for income taxes	$ 283	$ 263	$ 806	$ 686

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