Derivative Instruments Level 4 Non-qualifying Strategies for Hedge Accounting (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	$ 43,605		$ 43,605		$ 46,241
Derivative, Fair Value, Net	(518)		(518)		(530)
Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	23		23		23
Derivative, Fair Value, Net	0		0		0
Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	41,661		41,661		44,309
Derivative, Fair Value, Net	(569)		(569)		(549)
Derivative, Gain (Loss) on Derivative, Net	(47)	$ 22	(28)	$ (18)
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	921		921		895
Derivative, Fair Value, Net	31		31		79
Interest Rate Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	3,900		3,900		4,600
GMWB Product Derivatives [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	13,603		13,603		15,099
Derivative, Fair Value, Net	(348)		(348)		(262)
Derivative, Gain (Loss) on Derivative, Net	87	(150)	(22)	(91)
GMWB Reinsurance [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	2,809		2,809		3,106
Derivative, Fair Value, Net	98		98		83
Derivative, Gain (Loss) on Derivative, Net	(15)	24	(2)	15
Commodity Option [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	0	2	0	(5)
Equity Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	100		100		404
Derivative, Fair Value, Net	(1)		(1)		15
Derivative, Gain (Loss) on Derivative, Net	(2)	2	30	4
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(1)	2	(5)	4
Interest Rate Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	3,924		3,924		4,710
Derivative, Fair Value, Net	(402)		(402)		(415)
Derivative, Gain (Loss) on Derivative, Net	(3)	(4)	(11)	(7)
GMWB Hedging Instruments [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	10,464		10,464		10,979
Derivative, Fair Value, Net	169		169		158
GMWB Hedging Instruments [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	10,464		10,464		10,979
Derivative, Fair Value, Net	169		169		158
Derivative, Gain (Loss) on Derivative, Net	(66)	94	16	41
Other Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(1)	2	(48)	28
Macro Hedge Program [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	6,348		6,348		4,548
Derivative, Fair Value, Net	136		136		147
Macro Hedge Program [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(64)	51	(98)	24
Macro Hedge Program [Member] | Equity Option [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	6,348		6,348		4,548
Derivative, Fair Value, Net	136		136		147
Other Contract [Member] | GMWB Hedging Instruments [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	5,366		5,366		5,877
Derivative, Fair Value, Net	142		142		131
Equity Contract [Member] | GMWB Hedging Instruments [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	1,355		1,355		1,362
Derivative, Fair Value, Net	(13)		(13)		2
Interest Rate Contract [Member] | GMWB Hedging Instruments [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	3,743		3,743		3,740
Derivative, Fair Value, Net	40		40		25
JAPAN | Three Win Related Foreign Currency Swaps [Member] | Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Foreign Currency Fair Value Hedge	(10)	(17)	(118)	(1)
JAPAN | Three Win Related Foreign Currency Swaps [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	1,063		1,063		1,063
Derivative, Fair Value, Net	(247)		(247)		(357)
Derivative, Gain (Loss) on Derivative, Net	13	8
JAPAN | 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			109	(23)
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	(4)	4	(7)	3
Credit Default Swap, Selling Protection [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	1,298		1,298		$ 2,153
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	$ 9	$ (13)	$ 10	$ (11)