Discontinued Operations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Revenue
Net investment income	$ 0	$ 8
Net realized capital gains (losses)	0	(4)
Other revenues	0	47
Total revenues	0	51
Benefits, losses and expenses
Insurance operating and other expenses	2	32
Total benefits, losses and expenses	2	32
Income (loss) before income taxes	(2)	19
Income tax expense (benefit)	(1)	7
Income (loss) from operations of discontinued operations, net of tax	(1)	12
Net realized capital gain on disposal, net of tax	0	150
Income (loss) from discontinued operations, net of tax	$ (1)	$ 162