Basis of Presentation and Accounting Policies (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 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	$ 3,094		$ 3,094		$ 3,448
Deferred income taxes, net	1,333		1,333		2,006
Retained earnings (accumulated deficit)	261		261		(319)
Accumulated other comprehensive income, net of tax	2,026		2,026		953
Total stockholders' equity	10,572		10,572		8,911	7,400
Amortization of deferred policy acquisition costs and present value of future profits	91	213	262	421
Insurance operating costs and other expenses	215	2,346	782	3,015
Income before income taxes		(819)		(267)
Income tax expense (benefit)	59	(316)	137	(318)
Net income	203	(503)	578	51
Net Income (Loss) Attributable to Parent	203	(499)	579	53
Scenario, Previously Reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred policy acquisition costs and present value of future profits					4,598	4,900
Deferred income taxes, net					1,606
Retained earnings (accumulated deficit)					555
Accumulated other comprehensive income, net of tax					829
Total stockholders' equity					9,661	8,200
Amortization of deferred policy acquisition costs and present value of future profits		280		542
Insurance operating costs and other expenses		2,308		2,904
Income before income taxes		(848)		(277)
Income tax expense (benefit)		(323)		(315)
Net income		(525)		38
Net Income (Loss) Attributable to Parent		(521)		40
Effect of change [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred policy acquisition costs and present value of future profits					(1,150)	1,200
Deferred income taxes, net					400
Retained earnings (accumulated deficit)					(874)
Accumulated other comprehensive income, net of tax					124
Total stockholders' equity					(750)	800
Amortization of deferred policy acquisition costs and present value of future profits		(67)		(121)
Insurance operating costs and other expenses		38		111
Income before income taxes		29		10
Income tax expense (benefit)		7		(3)
Net income		22		13
Net Income (Loss) Attributable to Parent		$ 22		$ 13