Income Taxes (Details 4) (Valuation Allowance of Deferred Tax Assets [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Valuation Allowance of Deferred Tax Assets [Member]
Valuation Allowance [Line Items]
Valuation Allowances and Reserves, Balance, Beginning Balance	$ 10,705	[1]	$ 9,632	[1]	$ 9,897
Valuation Allowances and Reserves, Charged to Cost and Expense	(432)		(351)		(257)
Valuation Allowances and Reserves, Charged to Other Accounts	690		1,241		6
Valuation Allowances and Reserves, Adjustments	0		183		(14)
Valuation Allowances and Reserves, Balance, Ending Balance	$ 10,963	[1]	$ 10,705	[1]	$ 9,632	[1]

[1] (1) At December 31, 2012, 2011 and 2010, $3.1 billion, $2.5 billion and $1.2 billion of these balances were recorded in AOCI on our Consolidated Balance Sheets, respectively.