Fair Value of Financial Instruments (Components Of The Transfers In And Out Of Level 3) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers In to Level 3	$ 78	$ 275	$ 271	$ 251
Transfers Out of Level 3	(223)	(592)	(99)	(770)
Transfers In or Out of Level 3, Net	(145)	(317)	172	(519)
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	71	241	257	163
Transfers Out of Level 3	(197)	(314)	(43)	(521)
Transfers In or Out of Level 3, Net	(126)	(73)	214	(358)
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		27		29
Transfers Out of Level 3		(51)		(46)
Transfers In or Out of Level 3, Net		(24)		(17)
RMBS [Member] | Fixed Maturity AFS Securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers Out of Level 3		(181)		(147)
Transfers In or Out of Level 3, Net		(181)		(147)
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		4		13
Transfers Out of Level 3	(8)		(8)
Transfers In or Out of Level 3, Net	(8)	4	(8)	13
CDOs [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
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			5	35
Transfers Out of Level 3	(18)	(29)	(48)	(40)
Transfers In or Out of Level 3, Net	(18)	(29)	(43)	(5)
Trading Securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers In to Level 3	7	3	9	5
Transfers Out of Level 3		(17)		(16)
Transfers In or Out of Level 3, Net	$ 7	$ (14)	$ 9	$ (11)