Fair Value of Assets and Liabilities (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended																												3 Months Ended				3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014 Realized capital gains and losses	Mar. 31, 2013 Realized capital gains and losses	Mar. 31, 2014 Net investment income	Mar. 31, 2013 Net investment income	Mar. 31, 2014 Interest credited to contractholder funds	Mar. 31, 2013 Interest credited to contractholder funds	Mar. 31, 2014 Contract benefits	Mar. 31, 2013 Contract benefits	Mar. 31, 2014 Loss on disposition of operations	Mar. 31, 2014 Fixed income securities	Mar. 31, 2013 Fixed income securities	Mar. 31, 2014 Municipal	Mar. 31, 2013 Municipal	Mar. 31, 2014 Corporate	Mar. 31, 2013 Corporate	Mar. 31, 2014 ABS	Mar. 31, 2013 ABS	Mar. 31, 2014 CMBS	Mar. 31, 2013 CMBS	Mar. 31, 2014 Redeemable preferred stock	Mar. 31, 2013 Redeemable preferred stock	Dec. 31, 2012 Redeemable preferred stock	Mar. 31, 2014 Equity securities	Dec. 31, 2013 Equity securities	Mar. 31, 2013 Equity securities	Dec. 31, 2012 Equity securities	Mar. 31, 2014 Free-standing derivatives, net	Mar. 31, 2013 Free-standing derivatives, net	Mar. 31, 2013 Other assets	Dec. 31, 2012 Other assets	Mar. 31, 2014 Assets held for sale
Rollforward of Level 3 assets held at fair value on a recurring basis
Balance at beginning of period	$ 1,604	$ 2,041										$ 1,241	$ 2,060	$ 119	$ 338	$ 1,008	$ 1,501	$ 112	$ 199	$ 1	$ 21	$ 1	$ 1	$ 1	$ 6	$ 6	$ 7	$ 7	$ (5)	$ (27)	$ 1	$ 1	$ 362
Total gains (losses) included in: net income	1	7	3	2	2	5	10	(20)	5	26	(4)	4		(1)	(12)	5	12												(2)	7			(1)
Total gains (losses) included in: OCI	4	33										2	33	2	26		(2)		7		2												2
Transfers into Level 3	4	42											42				25		17														4
Transfers out of Level 3	(27)	(125)										(25)	(125)			(25)	(125)																(2)
Transfer from held for sale												4								4													(4)
Purchases	15	73										13	72			2	72	11											2	1
Sales	(96)	(235)										(88)	(235)	(1)	(101)	(86)	(109)		(8)		(17)	(1)											(8)
Settlements	(22)	(16)										(14)	(15)			(13)	(11)	(1)	(4)										(2)	(1)			(6)
Balance at end of period	1,483	1,820										1,137	1,832	119	251	891	1,363	122	211	5	6		1	1	6	6	7	7	(7)	(20)	1	1	347
Effect to net income reported in the Condensed Consolidated Statements of Operations and Comprehensive Income	1	7	3	2	2	5	10	(20)	5	26	(4)	4		(1)	(12)	5	12												(2)	7			(1)
Fair value assets and liabilities measured on recurring basis, gain (loss) included in earnings
Total realized and unrealized gains (losses) included in net income, recurring Level 3 assets and liabilities	16	13
Free-standing derivatives, assets	5	4
Free-standing derivatives, liabilities	12	24
Assets transferred between Level 1 and Level 2	0	0
Liabilities transferred between Level 1 and Level 2	$ 0	$ 0