Restatement Restatement YTD effects (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal		$ 0	$ (533)	$ 0
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	(22)	(17)	(269)	220
Income tax expense (benefit)	(37)	(74)	(281)	(289)
Net Income (Loss) Attributable to Parent	13	60	8	594
Net Income (Loss) Available to Common Stockholders, Basic	3	50	(23)	563
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	1,052	1,240	2,052	2,739
Basic	$ 0.01	$ 0.11	$ (0.04)	$ 1.07
Income (Loss) from Continuing Operations, Per Diluted Share	$ 0.01	$ 0.10	$ (0.04)	$ 0.99
Earnings Per Share, Basic	$ 0.01	$ 0.11	$ (0.05)	$ 1.27
Earnings Per Share, Diluted	$ 0.01	$ 0.11	$ (0.05)	$ 1.17
Scenario, Previously Reported [Member]
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal	0		0
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	511	(104)	264	138
Income tax expense (benefit)	108	(101)	(136)	(312)
Net Income (Loss) Attributable to Parent	401	0	396	535
Net Income (Loss) Available to Common Stockholders, Basic	391	(10)	365	504
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 1,440		$ 2,440
Basic	$ 0.90	$ (0.03)	$ 0.84	$ 0.94
Income (Loss) from Continuing Operations, Per Diluted Share	$ 0.83	$ (0.03)	$ 0.79	$ 0.87
Earnings Per Share, Basic	$ 0.90	$ (0.02)	$ 0.83	$ 1.13
Earnings Per Share, Diluted	$ 0.83	$ (0.02)	$ 0.78	$ 1.05