Derivatives Instruments Level 4 Non-qualifying Strategies for Hedge Accounting (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Maximum Aggregate Principal Amount of Junior Subordinated Notes	$ 0
Derivative, Notional Amount	54,221		$ 56,216
Derivative, Fair Value, Net	(501)		(1,001)
Put Option [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Maximum Aggregate Principal Amount of Junior Subordinated Notes	0
Interest Rate Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	10,200		10,600
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Fair Value, Net	66		68
ERROR in label resolution.
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	9,937		10,256
Derivative, Fair Value, Net	83		94
Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(47)	$ (29)
Derivative, Notional Amount	50,502		52,537
Derivative, Fair Value, Net	(492)		(907)
Not Designated as Hedging Instrument [Member] | Currency Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	307		1,064
Derivative, Fair Value, Net	(3)		68
Not Designated as Hedging Instrument [Member] | Put Option [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(1)	(2)
Derivative, Notional Amount	0		500
Derivative, Fair Value, Net	0		1
Not Designated as Hedging Instrument [Member] | Macro Hedge Program [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(86)	(14)
Derivative, Notional Amount	6,722		6,532
Derivative, Fair Value, Net	171		178
Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	11	39
Not Designated as Hedging Instrument [Member] | Other Contract [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(2)	(22)
Not Designated as Hedging Instrument [Member] | Equity Contract [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	0	18
Derivative, Notional Amount	339		105
Derivative, Fair Value, Net	5		0
Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	7	(24)
Derivative, Notional Amount	11,080		11,743
Derivative, Fair Value, Net	(474)		(890)
Not Designated as Hedging Instrument [Member] | Coinsurance and Modified Coinsurance Reinsurance Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Invested Assets Suppoting Modco	875		875
Not Designated as Hedging Instrument [Member] | GMWB Product Derivatives [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	101	(79)
Derivative, Notional Amount	12,631		13,114
Derivative, Fair Value, Net	(157)		(241)
Not Designated as Hedging Instrument [Member] | GMWB Reinsurance [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(18)	12
Derivative, Notional Amount	2,616		2,709
Derivative, Fair Value, Net	60		73
Not Designated as Hedging Instrument [Member] | ERROR in label resolution.
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(65)	50
Derivative, Notional Amount	9,937		10,256
Derivative, Fair Value, Net	83		94
Not Designated as Hedging Instrument [Member] | ERROR in label resolution.
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	21	36
Not Designated as Hedging Instrument [Member] | Credit Default Swap, Buying Protection [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	159		209
Derivative, Fair Value, Net	(4)		(4)
Not Designated as Hedging Instrument [Member] | Credit Default Swap, Selling Protection [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	1,904		1,309
Derivative, Fair Value, Net	0		10
ERROR in label resolution. | Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	5,213		5,191
ERROR in label resolution. | Equity Contract [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	1,374		1,362
ERROR in label resolution. | Interest Rate Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	3,350		3,703
Fair Value Hedging [Member] | Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Fair Value, Net	76		100
Fair Value Hedging [Member] | Equity Contract [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Fair Value, Net	(35)		(27)
Fair Value Hedging [Member] | Interest Rate Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Fair Value, Net	42		21
Fair Value Hedging [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(68)	(31)
Other Credit Derivatives [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	10	(37)
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	(11)	(5)
Credit Default Swap, Selling Protection [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	3,468		$ 2,968
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	17	(2)
Currency Swap [Member] | Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ (10)	$ 3