Income Tax (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Current:
Federal	$ (198)	$ 123	$ (237)
State and local	(1)	21	12
Foreign	614	203	227
Subtotal	415	347	2
Deferred:
Federal	2,258	672	(2,130)
State and local	(3)	(7)	26
Foreign	405	153	77
Subtotal	2,660	818	(2,027)
Current and Deferred:
Provision for income tax expense (benefit)	$ 3,075	$ 1,165	$ (2,025)