Fair Value of Financial Instruments (Components Of The Transfers In And Out Of Level 3) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers In to Level 3	$ 106	$ 150	$ 211	$ 1,709
Transfers Out of Level 3	(93)	(117)	(99)	(1,875)
Transfers In or Out of Level 3, Net	13	33	112	(166)
Transfers between Levels 1 and 2			172
Corporate Bonds [Member] | Fixed Maturity AFS Securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers In to Level 3	79	144	159	404
Transfers Out of Level 3	(76)	(80)	(77)	(140)
Transfers In or Out of Level 3, Net	3	64	82	264
ABS [Member] | Fixed Maturity AFS Securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers Out of Level 3		(4)		(4)
Transfers In or Out of Level 3, Net		(4)		(4)
Foreign Government Bonds [Member] | Fixed Maturity AFS Securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers In to Level 3				25
Transfers In or Out of Level 3, Net				25
CMBS [Member] | Fixed Maturity AFS Securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers In to Level 3				6
Transfers In or Out of Level 3, Net				6
CLOs [Member] | Fixed Maturity AFS Securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers In to Level 3	4		4	8
Transfers Out of Level 3	(16)	(4)	(16)	(4)
Transfers In or Out of Level 3, Net	(12)	(4)	(12)	4
State And Municipal Bonds [Member] | Fixed Maturity AFS Securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers Out of Level 3		(29)		(29)
Transfers In or Out of Level 3, Net		(29)		(29)
Hybrid And Redeemable Preferred Securities [Member] | Fixed Maturity AFS Securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers In to Level 3	23		48	12
Transfers Out of Level 3			(5)	(22)
Transfers In or Out of Level 3, Net	23		43	(10)
Equity AFS Securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers Out of Level 3	(1)		(1)
Transfers In or Out of Level 3, Net	$ (1)		$ (1)
Trading Securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers In to Level 3		6		10
Transfers Out of Level 3				(6)
Transfers In or Out of Level 3, Net		$ 6		4
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] | Other Assets [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
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)