Investments and Derivative Instruments (Details 13) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Derivative Classification by Hedge Destination and Derivative Type
Net Derivatives, Notional Amount	$ 141,307	$ 159,441
Net Derivatives, Fair Value	(591)	(737)
Asset Derivatives, Fair Value	1,522	1,948
Liability Derivatives, Fair Value	2,113	2,685
GMWB hedging instruments [Member] | U.S. [Member]
Derivative Classification by Hedge Destination and Derivative Type
Net Derivatives, Notional Amount	15,424	18,691
Net Derivatives, Fair Value	101	41
Asset Derivatives, Fair Value	278	333
Liability Derivatives, Fair Value	(177)	(292)
Macro Hedge Program [Member] | U.S. [Member]
Derivative Classification by Hedge Destination and Derivative Type
Net Derivatives, Notional Amount	7,596	9,934
Net Derivatives, Fair Value	133	139
Asset Derivatives, Fair Value	166	178
Liability Derivatives, Fair Value	(33)	(39)
Cash flow hedges [Member]
Derivative Classification by Hedge Destination and Derivative Type
Net Derivatives, Notional Amount	4,859	5,169
Net Derivatives, Fair Value	(56)	(97)
Asset Derivatives, Fair Value	46	52
Liability Derivatives, Fair Value	102	149
Cash Flow Hedging Interest Rate Swaps [Member]
Derivative Classification by Hedge Destination and Derivative Type
Net Derivatives, Notional Amount	4,716	5,026
Net Derivatives, Fair Value	(49)	(92)
Asset Derivatives, Fair Value	44	50
Liability Derivatives, Fair Value	(93)	(142)
Cash flow hedges foreign currency swaps [Member]
Derivative Classification by Hedge Destination and Derivative Type
Net Derivatives, Notional Amount	143	143
Net Derivatives, Fair Value	(7)	(5)
Asset Derivatives, Fair Value	2	2
Liability Derivatives, Fair Value	(9)	(7)
Fair Value Hedging Interest Rate Swaps [Member]
Derivative Classification by Hedge Destination and Derivative Type
Net Derivatives, Notional Amount	1,031	1,799
Net Derivatives, Fair Value	(25)	(24)
Asset Derivatives, Fair Value	1	3
Liability Derivatives, Fair Value	(26)	(27)
Non-qualifying strategies [Member]
Derivative Classification by Hedge Destination and Derivative Type
Net Derivatives, Notional Amount	135,417	152,473
Net Derivatives, Fair Value	(510)	(616)
Asset Derivatives, Fair Value	1,475	1,893
Liability Derivatives, Fair Value	1,985	2,509
Interest Rate Swaps Caps Floors and Futures [Member]
Derivative Classification by Hedge Destination and Derivative Type
Net Derivatives, Notional Amount	11,106	8,453
Net Derivatives, Fair Value	(502)	(487)
Asset Derivatives, Fair Value	230	171
Liability Derivatives, Fair Value	(732)	(658)
Foreign Currency Swaps and Forwards Non-qualifying as Hedges [Member]
Derivative Classification by Hedge Destination and Derivative Type
Net Derivatives, Notional Amount	247	258
Net Derivatives, Fair Value	(12)	(9)
Asset Derivatives, Fair Value	6	6
Liability Derivatives, Fair Value	(18)	(15)
3 Win Related Foreign Currency Swaps [Member] | JAPAN [Member]
Derivative Classification by Hedge Destination and Derivative Type
Net Derivatives, Notional Amount	1,571	1,571
Net Derivatives, Fair Value	(338)	(354)
Asset Derivatives, Fair Value	0	0
Liability Derivatives, Fair Value	(338)	(354)
Fixed Annuity Hedging Instruments [Member] | JAPAN [Member]
Derivative Classification by Hedge Destination and Derivative Type
Net Derivatives, Notional Amount	1,381	1,436
Net Derivatives, Fair Value	(2)	(6)
Asset Derivatives, Fair Value	88	88
Liability Derivatives, Fair Value	(90)	(94)
Credit Derivatives that Purchase Credit Protection [Member]
Derivative Classification by Hedge Destination and Derivative Type
Net Derivatives, Notional Amount	550	938
Net Derivatives, Fair Value	(10)	(15)
Asset Derivatives, Fair Value	1	1
Liability Derivatives, Fair Value	(11)	(16)
Credit Derivatives that Assume Credit Risk [Member]
Derivative Classification by Hedge Destination and Derivative Type
Net Derivatives, Notional Amount	1,724	1,886
Net Derivatives, Fair Value	22	33
Asset Derivatives, Fair Value	26	36
Liability Derivatives, Fair Value	(4)	(3)
Credit Derivatives in Offsetting Positions [Member]
Derivative Classification by Hedge Destination and Derivative Type
Net Derivatives, Notional Amount	6,339	7,764
Net Derivatives, Fair Value	(5)	(7)
Asset Derivatives, Fair Value	69	76
Liability Derivatives, Fair Value	(74)	(83)
Equity index swaps options [Member]
Derivative Classification by Hedge Destination and Derivative Type
Net Derivatives, Notional Amount	362	358
Net Derivatives, Fair Value	(2)	(1)
Asset Derivatives, Fair Value	19	19
Liability Derivatives, Fair Value	(21)	(20)
GMWB product derivatives [Member] | U.S. [Member]
Derivative Classification by Hedge Destination and Derivative Type
Net Derivatives, Notional Amount	21,195	21,512
Net Derivatives, Fair Value	(24)	(36)
Asset Derivatives, Fair Value	0	0
Liability Derivatives, Fair Value	(24)	(36)
GMWB Reinsurance [Member] | U.S. [Member]
Derivative Classification by Hedge Destination and Derivative Type
Net Derivatives, Notional Amount	4,280	4,508
Net Derivatives, Fair Value	30	29
Asset Derivatives, Fair Value	30	29
Liability Derivatives, Fair Value	0	0
International program product derivatives [Member]
Derivative Classification by Hedge Destination and Derivative Type
Net Derivatives, Notional Amount	353	366
Net Derivatives, Fair Value	4	6
Asset Derivatives, Fair Value	4	6
Liability Derivatives, Fair Value	0	0
International program hedging instruments [Member]
Derivative Classification by Hedge Destination and Derivative Type
Net Derivatives, Notional Amount	61,528	73,048
Net Derivatives, Fair Value	98	(33)
Asset Derivatives, Fair Value	542	866
Liability Derivatives, Fair Value	(444)	(899)
Contingent Capital Facility Put Option [Member]
Derivative Classification by Hedge Destination and Derivative Type
Net Derivatives, Notional Amount	500	500
Net Derivatives, Fair Value	16	17
Asset Derivatives, Fair Value	16	17
Liability Derivatives, Fair Value	$ 0	$ 0