Consolidated Statements of Equity (Unaudited) (USD $) In Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Net Unrealized Investment Gain (Loss) [Member]	Accumulated Other Comprehensive Income (Loss) Other-Than-Temporary Impairments [Member]	Accumulated Other Comprehensive Income (Loss) Foreign Currency Translation Adjustments [Member]
Beginning Balance at Dec. 31, 2009 (Scenario, Previously Reported [Member])	$ 6,561	$ 86	$ 6,719	$ 541	$ (593)	$ (83)	$ (109)
Beginning Balance (Accounting Standards Update 2009-17 [Member])	0	0	0	(34)	23	11	0
Beginning Balance at Dec. 31, 2009	6,561	86	6,719	507	(570)	(72)	(109)
Comprehensive income (loss):
Net income	519			519
Other comprehensive income (loss):
Unrealized gains (losses) on derivative instruments, net of income tax	33				33
Unrealized investment gains (losses), net of related offsets and income tax	1,836				1,790	46
Foreign currency translation adjustments, net of income tax	(24)						(24)
Other comprehensive income (loss)	1,845
Comprehensive income (loss)	2,364
Ending Balance at Sep. 30, 2010	8,925	86	6,719	1,026	1,253	(26)	(133)
Beginning Balance at Dec. 31, 2010	7,951	86	6,719	934	388	(51)	(125)
Capital contribution	1		1
Return of capital (Note 6)	(47)		(47)
Comprehensive income (loss):
Net income	921			921
Other comprehensive income (loss):
Unrealized gains (losses) on derivative instruments, net of income tax	226				226
Unrealized investment gains (losses), net of related offsets and income tax	1,338				1,355	(17)
Foreign currency translation adjustments, net of income tax	2						2
Other comprehensive income (loss)	1,566
Comprehensive income (loss)	2,487
Ending Balance at Sep. 30, 2011	$ 10,392	$ 86	$ 6,673	$ 1,855	$ 1,969	$ (68)	$ (123)