Fair Value of Financial Instruments (Components Of The Transfers In And Out Of Level 3) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers In to Level 3	$ 7	$ 40	$ 218	$ 1,749
Transfers Out of Level 3	(67)	(285)	(166)	(2,160)
Transfers In or Out of Level 3, Net	(60)	(245)	52	(411)
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		14	159	418
Transfers Out of Level 3	(66)	(280)	(143)	(420)
Transfers In or Out of Level 3, Net	(66)	(266)	16	(2)
ABS [Member] | Fixed Maturity AFS Securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers In to Level 3		26		26
Transfers Out of Level 3				(4)
Transfers In or Out of Level 3, Net		26		22
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	4		4	25
Transfers In or Out of Level 3, Net	4		4	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	8
Transfers Out of Level 3			(16)	(4)
Transfers In or Out of Level 3, Net			(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)
Transfers In or Out of Level 3, Net				(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			48	12
Transfers Out of Level 3			(5)	(22)
Transfers In or Out of Level 3, Net			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)
Transfers In or Out of Level 3, Net			(1)
Trading Securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers In to Level 3	3		3	10
Transfers Out of Level 3	(1)	(5)	(1)	(11)
Transfers In or Out of Level 3, Net	$ 2	$ (5)	$ 2	(1)
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)