Income Taxes - Components of Income Tax Table (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current [Abstract]
Federal	$ 113	$ 45	$ (381)
State	42	25	1
Foreign	873	891	977
Total	1,028	961	597
Deferred [Abstract]
Federal	94	(30)	(1,470)
State	(9)	115	(68)
Foreign	52	74	85
Total	137	159	(1,453)
Income tax expense (benefit)	$ 1,165	$ 1,120	$ (856)