Derivative Instrument Level 4 Non-qualifying Strategies for Hedge Accounting (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Maximum Aggregate Principal Amount of Junior Subordinated Notes	$ 500
Derivative, Notional Amount	56,216	$ 62,185
Derivative, Fair Value, Net	(1,001)	(926)
Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	0	23
Derivative, Fair Value, Net	0	0
GMWB Hedging Instruments [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	10,256	10,979
Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(64)	(104)	$ (353)
Derivative, Notional Amount	52,537	58,492
Derivative, Fair Value, Net	(907)	(924)
Not Designated as Hedging Instrument [Member] | Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(201)	(133)	(6)
Commodity Option [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	0	(9)	0
Swap [Member] | Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Fair Value, Net	100	131
Swap [Member] | GMWB Hedging Instruments [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	5,191	5,877
Equity Contract [Member] | Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Fair Value, Net	(27)	2
Equity Contract [Member] | GMWB Hedging Instruments [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	1,362	1,362
Equity Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	15	19	3
Derivative, Notional Amount	105	419
Derivative, Fair Value, Net	0	15
Credit Default Swap, Selling Protection [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	1,309	2,458
Derivative, Fair Value, Net	10	(13)
Interest Rate Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(17)	(15)	(172)
Derivative, Notional Amount	11,743	14,290
Derivative, Fair Value, Net	(890)	(814)
GMWB Hedging Instruments [Member] | Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Fair Value, Net	94	158
GMWB Hedging Instruments [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(112)	(45)	3
Derivative, Notional Amount	10,256	10,979
Derivative, Fair Value, Net	94	158
Interest Rate Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	10,600	12,900
Interest Rate Swap [Member] | Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Fair Value, Net	21	25
Interest Rate Swap [Member] | GMWB Hedging Instruments [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	3,703	3,740
Macro Hedge Program [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(163)	(46)	(11)
Derivative, Notional Amount	6,532	4,548
Derivative, Fair Value, Net	178	147
Put Option [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Maximum Aggregate Principal Amount of Junior Subordinated Notes	500
Put Option [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(6)	(6)	(6)
Derivative, Notional Amount	500	500
Derivative, Fair Value, Net	1	7
Other Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(12)	46	(34)
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Fair Value, Net	68	79
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Invested Assets Suppoting Modco	875	895
Derivative, Notional Amount		895
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	140	(3)	(142)
Fixed Annuity Hedging Instruments [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	25	(21)	(148)
Credit Default Swap, Buying Protection [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	209	423
Derivative, Fair Value, Net	(4)	18
GMWB Product Derivatives [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	88	(59)	(2)
Derivative, Notional Amount	13,114	15,099
Derivative, Fair Value, Net	(241)	(262)
GMWB Reinsurance [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(14)	17	4
Derivative, Notional Amount	2,709	3,106
Derivative, Fair Value, Net	73	83
Three Win Related Foreign Currency Swaps [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	804	1,063
Derivative, Fair Value, Net	(263)	(357)
Foreign Exchange Option [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	0	0	(2)
Other Credit Derivatives [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(3)	32	(205)
Credit Default Swap, Selling Protection [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	2,968	4,487
Credit Default Swap, Selling Protection [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	43	(11)	16
Credit Default Swap, Buying Protection [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(26)	8	(10)
Currency Swap [Member] | Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ 115	$ 18	$ 6