Income Taxes (Details 1) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Current income tax provision:
Federal	$ 143	$ 302	$ 304
State and local	39	53	58
Foreign	71	52	39
Subtotal	253	407	401
Deferred income tax provision:
Federal	84	84	60
State and local	12	16	5
Foreign	11	11	9
Subtotal	107	111	74
Total provision for income taxes	$ 360	$ 518	$ 475