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, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers Into Level 3	$ 141	$ 212	$ 33	$ 229
Transfers Out of Level 3	(116)	(352)	(150)	(276)
Total	25	(140)	(117)	(47)
Corporate Bonds [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers Into Level 3	100	159	32	228
Transfers Out of Level 3	(76)	(119)	(52)	(114)
Total	24	40	(20)	114
RMBS [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers Out of Level 3			(12)	(15)
Total			(12)	(15)
ABS [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers Into Level 3	2	2	1	1
Transfers Out of Level 3	(40)	(233)	(69)	(111)
Total	(38)	(231)	(68)	(110)
CMBS [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers Into Level 3	4	4
Transfers Out of Level 3			(17)	(17)
Total	4	4	$ (17)	(17)
Hybrid And Redeemable Preferred Securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers Into Level 3	4	16
Total	4	16
Trading Securities [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers Out of Level 3				(4)
Total				(4)
Derivative Investments [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract]
Transfers Into Level 3	31	31
Transfers Out of Level 3				(15)
Total	$ 31	$ 31		$ (15)