Fair Value of Financial Instruments (Components Of The Transfers In And Out Of Level 3) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers In to Level 3	$ 1,856	$ 401	$ 83
Transfers Out of Level 3	(2,196)	(581)	(971)
Transfers In or Out of Level 3, Net	(340)	(180)	(888)
Corporate bonds [Member] \| Fixed maturity securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers In to Level 3	475	373	34
Transfers Out of Level 3	(456)	(459)	(648)
Transfers In or Out of Level 3, Net	19	(86)	(614)
Asset-backed Securities [Member] \| Fixed maturity securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers In to Level 3	26		1
Transfers Out of Level 3	(4)	(34)	(43)
Transfers In or Out of Level 3, Net	22	(34)	(42)
Foreign government bonds [Member] \| Fixed maturity securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers In to Level 3	25
Transfers Out of Level 3			(46)
Transfers In or Out of Level 3, Net	25		(46)
RMBS [Member] \| Fixed maturity securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers Out of Level 3			(147)
Transfers In or Out of Level 3, Net			(147)
CMBS [Member] \| Fixed maturity securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers In to Level 3	6		5
Transfers Out of Level 3		(8)	(7)
Transfers In or Out of Level 3, Net	6	(8)	(2)
CLOs [Member] \| Fixed maturity securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers In to Level 3	53		6
Transfers Out of Level 3	(4)	(28)	(21)
Transfers In or Out of Level 3, Net	49	(28)	(15)
State and municipal bonds [Member] \| Fixed maturity securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers Out of Level 3	(29)
Transfers In or Out of Level 3, Net	(29)
Hybrid and redeemable preferred securities [Member] \| Fixed maturity securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers In to Level 3	17	20	35
Transfers Out of Level 3	(22)	(50)	(40)
Transfers In or Out of Level 3, Net	(5)	(30)	(5)
Trading securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers In to Level 3	10	8	2
Transfers Out of Level 3	(11)	(2)	(19)
Transfers In or Out of Level 3, Net	(1)	6	(17)
Derivative investments [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers Out of Level 3	(426)
Transfers In or Out of Level 3, Net	(426)
GLB embedded derivative reserves [Member] \| Future contract benefits [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers Out of Level 3	(1,244)
Transfers In or Out of Level 3, Net	(1,244)
GLB embedded derivative reserves [Member] \| Other liabilities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers In to Level 3	1,244
Transfers In or Out of Level 3, Net	$ 1,244

Amount of transfer of financial instrument classified as an asset into level 3 of the fair value hierarchy.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(3)

-URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258

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- Definition

Amount of transfer of financial instrument classified as an asset into (out of) level 3 of the fair value hierarchy.

+ References

No definition available.

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Amount of transfers of financial instrument classified as an asset out of level 3 of the fair value hierarchy.

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