Income Taxes Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Net income tax benefit related to favorable IRS tax settlement		$ 82
Net operating loss carryforwards	284
Reinvestment of future remittances of undistributed earnings of foreign subsidiaries	6,232
Unrecognized tax benefits, interest on income taxes expense	216	235
United States
Net operating loss carryforwards	146
Operating loss carryforwards, expiration dates	2012 and 2021
International
Net operating loss carryforwards	138
Operating loss carryforwards, expiration dates	expire beginning in 2013; however, some have no expiration
Operating loss carryforwards, valuation allowance	$ 51