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Derivatives Instruments Level 4 Non-qualifying Strategies for Hedge Accounting (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Maximum Aggregate Principal Amount of Junior Subordinated Notes	$ 0		$ 0
Derivative, Notional Amount	52,286		52,286		$ 56,216
Derivative, Fair Value, Net	(498)		(498)		(1,001)
Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(58)	$ (35)	(145)	$ (22)
Derivative, Notional Amount	48,132		48,132		52,537
Derivative, Fair Value, Net	(479)		(479)		(907)
Interest Rate Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	9,900		9,900		10,600
Interest Rate Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(9)	(2)	(3)	(22)
Derivative, Notional Amount	11,228		11,228		11,743
Derivative, Fair Value, Net	(476)		(476)		(890)
Currency Swap [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	165		165		1,064
Derivative, Fair Value, Net	(1)		(1)		68
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	(3)	13	8	109
Credit Default Swap, Buying Protection [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	144		144		209
Derivative, Fair Value, Net	(3)		(3)		(4)
Credit Default Swap, Selling Protection [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	1,105		1,105		1,309
Derivative, Fair Value, Net	4		4		10
Equity Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(3)	(2)	(7)	15
Derivative, Notional Amount	167		167		105
Derivative, Fair Value, Net	2		2		0
GMWB Product Derivatives [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	58	87	198	(22)
Derivative, Notional Amount	11,797		11,797		13,114
Derivative, Fair Value, Net	(93)		(93)		(241)
GMWB Reinsurance [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(9)	(15)	(33)	(2)
Derivative, Notional Amount	2,450		2,450		2,709
Derivative, Fair Value, Net	51		51		73
GMWB Hedging Instruments [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	9,391		9,391		10,256
Derivative, Fair Value, Net	65		65		94
GMWB Hedging Instruments [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(34)	(66)	(112)	16
Derivative, Notional Amount	9,391		9,391		10,256
Derivative, Fair Value, Net	65		65		94
Macro Hedge Program [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(65)	(64)	(189)	(98)
Derivative, Notional Amount	8,157		8,157		6,532
Derivative, Fair Value, Net	166		166		178
Put Option [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Maximum Aggregate Principal Amount of Junior Subordinated Notes	0		0
Put Option [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	0	(1)	(1)	(4)
Derivative, Notional Amount	0		0		500
Derivative, Fair Value, Net	0		0		1
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Fair Value, Net	57		57		68
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	882		882		875
Foreign Exchange Forward [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net				138
Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(3)	17	(9)	134
Other Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	0	(1)	(10)	(48)
GMWB Hedging Instruments [Member] | Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	5,035		5,035		5,191
GMWB Hedging Instruments [Member] | Interest Rate Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	2,986		2,986		3,703
GMWB Hedging Instruments [Member] | Equity Contract [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	1,370		1,370		1,362
Fair Value Hedging [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(50)	(58)	(136)	(106)
Fair Value Hedging [Member] | Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Fair Value, Net	62		62		100
Fair Value Hedging [Member] | Interest Rate Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Fair Value, Net	44		44		21
Fair Value Hedging [Member] | Equity Contract [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Fair Value, Net	(41)		(41)		(27)
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	10	(12)	40	(19)
Credit Default Swap, Selling Protection [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	2,026		2,026		$ 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	(3)	24	(19)	28
Other Credit Derivatives [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(5)	6	0	(50)
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	$ 0	$ 4	$ (17)	$ 25

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Amount of invested assets supporting other policyholder fund liabilities under a modified coinsurance agreement.

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
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