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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers Into Level 3	$ 51	$ 11	$ 141	$ 80
Transfers Out of Level 3	(286)	(159)	(815)	(519)
Total Transfers Into or (Out) of Level 3	(235)	(148)	(674)	(439)
Corporate Bonds [Member] | Fixed Maturity Securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers Into Level 3	51	11	136	54
Transfers Out of Level 3		(42)	(171)	(115)
Total Transfers Into or (Out) of Level 3	51	(31)	(35)	(61)
RMBS [Member] | Fixed Maturity Securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers Out of Level 3			(7)	(12)
Total Transfers Into or (Out) of Level 3			(7)	(12)
CMBS [Member] | Fixed Maturity Securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers Out of Level 3				(21)
Total Transfers Into or (Out) of Level 3				(21)
ABS [Member] | Fixed Maturity Securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers Out of Level 3	(173)	(111)	(396)	(204)
Total Transfers Into or (Out) of Level 3	(173)	(111)	(396)	(204)
Equity AFS Securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers Out of Level 3				(161)
Total Transfers Into or (Out) of Level 3				(161)
Trading Securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers Into Level 3			5
Transfers Out of Level 3	(113)	(6)	(241)	(6)
Total Transfers Into or (Out) of Level 3	$ (113)	$ (6)	$ (236)	(6)
Equity Securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers Into Level 3				26
Total Transfers Into or (Out) of Level 3				$ 26