Fair Value of Assets and Liabilities (Details 3) (USD $) In Millions, unless otherwise specified	12 Months Ended																																						12 Months Ended									12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Realized capital gains and losses	Dec. 31, 2011 Realized capital gains and losses	Dec. 31, 2013 Net investment income	Dec. 31, 2012 Net investment income	Dec. 31, 2011 Net investment income	Dec. 31, 2013 Interest credited to contractholder funds	Dec. 31, 2012 Interest credited to contractholder funds	Dec. 31, 2011 Interest credited to contractholder funds	Dec. 31, 2013 Life and annuity contract benefits	Dec. 31, 2012 Life and annuity contract benefits	Dec. 31, 2011 Life and annuity contract benefits	Dec. 31, 2013 Loss on disposition of operations	Dec. 31, 2013 Fixed income securities	Dec. 31, 2012 Fixed income securities	Dec. 31, 2011 Fixed income securities	Dec. 31, 2013 U.S. government and agencies	Dec. 31, 2012 U.S. government and agencies	Dec. 31, 2013 Municipal	Dec. 31, 2012 Municipal	Dec. 31, 2011 Municipal	Dec. 31, 2013 Corporate	Dec. 31, 2012 Corporate	Dec. 31, 2011 Corporate	Dec. 31, 2013 Asset-backed securities ("ABS")	Dec. 31, 2012 Asset-backed securities ("ABS")	Dec. 31, 2011 Asset-backed securities ("ABS")	Dec. 31, 2013 Residential mortgage-backed securities ("RMBS")	Dec. 31, 2012 Residential mortgage-backed securities ("RMBS")	Dec. 31, 2011 Residential mortgage-backed securities ("RMBS")	Dec. 31, 2013 Commercial mortgage-backed securities ("CMBS")	Dec. 31, 2012 Commercial mortgage-backed securities ("CMBS")	Dec. 31, 2011 Commercial mortgage-backed securities ("CMBS")	Dec. 31, 2012 Redeemable preferred stock	Dec. 31, 2013 Redeemable preferred stock	Dec. 31, 2010 Redeemable preferred stock	Dec. 31, 2013 Equity securities	Dec. 31, 2012 Equity securities	Dec. 31, 2011 Equity securities	Dec. 31, 2013 Free-standing derivatives, net	Dec. 31, 2012 Free-standing derivatives, net	Dec. 31, 2011 Free-standing derivatives, net	Dec. 31, 2013 Other assets	Dec. 31, 2011 Other assets	Dec. 31, 2010 Other assets	Dec. 31, 2013 Assets held for sale
Fair Value Assets Measured on Recurring Basis Unobservable Input Reconciliation Calculation Rollforward
Balance at beginning of period	$ 3,042	$ 3,095	$ 9,102													$ 2,897	$ 3,146	$ 9,059	$ 8		$ 965	$ 1,332	$ 2,016	$ 1,617	$ 1,405	$ 1,908	$ 251	$ 297	$ 2,417	$ 3	$ 51	$ 1,794	$ 52	$ 60	$ 923	$ 1	$ 1	$ 1	$ 171	$ 43	$ 63	$ (27)	$ (95)	$ (21)	$ 1	$ 1	$ 1
Total gains (losses) included in: net income	20	27	(189)	3	(221)	18	27	36	40	132	(106)	74	36	(32)	(6)	1	7	(88)			(33)	(35)	(44)	35	20	62		26	23			(86)	(1)	(4)	(43)				3	(7)	(10)	19	27	(91)	(1)			(2)
Total gains (losses) included in: OCI	47	223	165													46	214	165			47	76	54	(32)	68	(44)	29	61	(65)			107	2	9	113				7	9								(6)
Transfers into Level 3	136	491	395													123	491	395		8	6	53	70	84	387	239	29	43					4		86													13
Transfers out of Level 3	(485)	(253)	(4,974)													(472)	(253)	(4,964)			(63)	(28)	(82)	(323)	(92)	(523)	(86)	(81)	(2,137)		(47)	(1,256)		(5)	(966)						(10)							(13)
Transfer to held for sale																(385)					(51)			(244)			(85)						(5)															385
Purchases	754	703	997													744	512	926			55	46	14	504	276	387	174	155	504			4	11	34	17	1			1	164	1	9	27	70
Sales	(1,108)	(1,056)	(1,840)													(1,048)	(1,018)	(1,839)			(558)	(463)	(689)	(389)	(310)	(537)	(82)	(217)	(169)			(378)	(19)	(27)	(66)	(1)			(50)	(38)	(1)							(10)
Settlements	(220)	(188)	(561)													(209)	(202)	(508)	(1)		(25)	(16)	(7)	(143)	(137)	(87)	(38)	(33)	(276)	(1)	(1)	(134)	(1)	(15)	(4)							(6)	14	(53)				(5)
Balance at end of period	2,186	3,042	3,095													1,697	2,897	3,146	7	8	343	965	1,332	1,109	1,617	1,405	192	251	297	2	3	51	43	52	60	1	1	1	132	171	43	(5)	(27)	(95)		1	1	362
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	129	195	(323)
Free-standing derivatives, assets	9	3	1
Free-standing derivatives, liabilities	14	30	96
Assets transferred between Level 1 and Level 2	0		0
Liabilities transferred between Level 1 and Level 2	$ 0		$ 0