Income Tax - Components of Consolidated Income Taxes (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
Current:
United States — Federal	$ 202	$ 116	$ 479	$ 435
United States — State	19	16	38	51
Outside United States	342	313	1,033	859
Current Income Tax Expense (Benefit), Total	563	445	1,550	1,345
Deferred:
United States — Federal	(38)	36	(27)	12
United States — State	(4)	2	(2)	(1)
Outside United States	35	26	9	28
Valuation allowance		(3)		(23)
Deferred income taxes	(7)	61	(20)	16
Consolidated taxes on income	$ 556	$ 506	$ 1,530	$ 1,361