Income Taxes (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income (loss) before income tax benefit:
Domestic	$ 668	$ 623	$ 228
Foreign	790	708	264
Income before income tax expense	1,458	1,331	492
Current:
Federal	256	144	314
State	14	(2)	31
Foreign	49	28	29
Total Current	319	170	374
Deferred
Federal	12	61	(264)
State	(11)	(4)	8
Foreign	(11)	19	(45)
Release of valuation allowance	0	0	0
Total Deferred	(10)	76	(301)
Add back benefit credited to additional paid-in capital:
Excess tax benefit associated with stock options	0	0	1
Income tax expense	$ 309	$ 246	$ 74