Income Tax - Components of Consolidated Income Taxes (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Disclosure - Income Tax - Components of Consolidated Income Taxes (Detail) [Line Items]
United States — Federal	$ 116	$ 195	$ 435	$ 556
United States — State	16	16	51	51
Outside United States	313	283	859	749
Current Income Tax Expense (Benefit), Total	445	494	1,345	1,356
United States — Federal	36	(66)	12	(91)
United States — State	2	(2)	(1)	(4)
Outside United States	26	10	28	3
Valuation allowance	(3)		(23)	4
Deferred income taxes	61	(58)	16	(88)
Consolidated taxes on income	$ 506	$ 436	$ 1,361	$ 1,268