Income Taxes (Provision For Taxes) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Provision for Income Taxes
Current tax expense (benefit)	$ 1,368	$ 775	$ (2,292)
Deferred tax expense (benefit) from temporary differences	(877)	124	1,307
Total	491	899	(985)
U.S. earnings (loss) from continuing operations before income taxes	4,618	3,111	(174)
Non-U.S. earnings (loss) from continuing operations before income taxes	3,337	4,499	2,325
U.S. federal income tax expense (benefit)	(40)	(2,104)	(3,760)
Non-U.S. jurisdiction income tax expense (benefit)	1,460	3,032	1,589
Deferred U.S. federal income tax expense (benefit)	30	1,613	2,099
Deferred non-U.S. federal income tax expense (benefit)	(834)	(1,620)	(913)
Cumulative earning of non-U.S affiliates reinvested indefinitely	$ 72	$ 68
Number of income tax returns file annually	5,900
Number of global taxing jurisdictions	250