Basis of Presentation and Accounting Policies (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011	Dec. 31, 2010
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred policy acquisition costs and present value of future profits	$ 6,336		$ 6,336		$ 6,556	$ 9,900
Deferred income taxes, net	1,808		1,808		2,131
Other liabilities	10,529		10,529		8,412
Retained earnings	10,887		10,887		11,001
Accumulated other comprehensive income, net of tax	2,256		2,256		1,251
Total stockholders' equity	21,961	20,158	21,961	20,158	21,486	18,700
Amortization of deferred policy acquisition costs and present value of future profits	554	592	875	1,042
Insurance operating costs and other expenses	1,309	1,452	2,621	2,806
Income (loss) from continuing operations before income taxes	(249)	(150)	(247)	237
Income tax expense (benefit)	(149)	(263)	(244)	(215)
Net income (loss)	(101)	33	(5)	534
Net income (loss) available to common shareholders	(112)	22	(26)	513
Income (loss) from continuing operations, net of tax, available to common shareholders per common share
Basic	$ (0.25)	$ 0.23	$ (0.05)	$ 0.97
Diluted	$ (0.25)	$ 0.21	$ (0.05)	$ 0.89
Net income available to common shareholders per common share
Basic	$ (0.26)	$ 0.05	$ (0.06)	$ 1.15
Diluted	$ (0.26)	$ 0.05	$ (0.06)	$ 1.06
Scenario, Previously Reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred policy acquisition costs and present value of future profits					8,744
Deferred income taxes, net					1,398
Other liabilities					8,443
Retained earnings					12,519
Accumulated other comprehensive income, net of tax					1,157
Total stockholders' equity					22,910	20,300
Amortization of deferred policy acquisition costs and present value of future profits		835		1,499
Insurance operating costs and other expenses		1,224		2,344
Income (loss) from continuing operations before income taxes		(165)		242
Income tax expense (benefit)		(269)		(211)
Net income (loss)		24		535
Net income (loss) available to common shareholders		13		514
Income (loss) from continuing operations, net of tax, available to common shareholders per common share
Basic		$ 0.21		$ 0.97
Diluted		$ 0.19		$ 0.89
Net income available to common shareholders per common share
Basic		$ 0.03		$ 1.16
Diluted		$ 0.03		$ 1.06
Effect of change [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred policy acquisition costs and present value of future profits					(2,188)	2,400
Deferred income taxes, net					733
Other liabilities					(31)
Retained earnings					(1,518)
Accumulated other comprehensive income, net of tax					94
Total stockholders' equity					(1,424)	1,600
Amortization of deferred policy acquisition costs and present value of future profits		(243)		(457)
Insurance operating costs and other expenses		228		462
Income (loss) from continuing operations before income taxes		15		(5)
Income tax expense (benefit)		6		(4)
Net income (loss)		9		(1)
Net income (loss) available to common shareholders		$ 9		$ (1)
Income (loss) from continuing operations, net of tax, available to common shareholders per common share
Basic		$ 0.02		$ 0.00
Diluted		$ 0.02		$ 0.00
Net income available to common shareholders per common share
Basic		$ 0.02		$ (0.01)
Diluted		$ 0.02		$ 0.00