Income Taxes (Details 4) (Valuation Allowance of Deferred Tax Assets [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Valuation Allowance of Deferred Tax Assets [Member]
Valuation Allowance [Line Items]
Valuation Allowances and Reserves, Balance, Beginning Balance	$ 9,632	[1]	$ 9,897	[1]	$ 9,830
Valuation Allowances and Reserves, Charged to Cost and Expense	(351)		(257)		521
Valuation Allowances and Reserves, Charged to Other Accounts	1,241		6		(308)
Valuation Allowances and Reserves, Adjustments	183		(14)		(146)
Valuation Allowances and Reserves, Balance, Ending Balance	$ 10,705	[1]	$ 9,632	[1]	$ 9,897	[1]

[1] At December 31, 2011, 2010 and 2009, $2.5 billion, $1.2 billion and $1.2 billion of these balances were recorded in accumulated other comprehensive loss on our Consolidated Balance Sheets, respectively.