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Fair Value of Financial Instruments (Schedule Of Investment Holdings Movements) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	$ 466	$ 319	$ 1,849	$ 1,349
Sales	(27)	(235)	(306)	(655)
Maturities	(104)	(181)	(316)	(382)
Settlements	(53)	(502)	(419)	(1,036)
Calls	(30)	(45)	(47)	(123)
Total	252	(644)	761	(847)
Other Assets [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances				21
Settlements				(896)
Total				(875)
Corporate Bonds [Member] | Fixed Maturity AFS Securities [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	219	154	926	683
Sales	(12)	(58)	(29)	(230)
Maturities	(82)	(3)	(103)	(37)
Settlements	(70)	(18)	(337)	(112)
Calls		(45)	(17)	(123)
Total	55	30	440	181
U.S. Government Bonds [Member] | Fixed Maturity AFS Securities [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Maturities			(5)
Total			(5)
Foreign Government Bonds [Member] | Fixed Maturity AFS Securities [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	66		80
Maturities		(20)		(20)
Total	66	(20)	80	(20)
CMBS [Member] | Fixed Maturity AFS Securities [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances			8
Total			8
ABS [Member] | Fixed Maturity AFS Securities [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	195	74	563	353
Settlements	(51)	(14)	(137)	(35)
Total	144	60	426	318
Hybrid And Redeemable Preferred Securities [Member] | Fixed Maturity AFS Securities [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	3	14	9	14
Sales			(20)	(4)
Calls	(30)		(30)
Total	(27)	14	(41)	10
Mortgage Loans On Real Estate [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	8		89
Sales			(101)
Maturities	(22)		(26)
Settlements	(19)		(19)
Total	(33)		(57)
Trading Securities [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	3	15	127	53
Sales	(15)		(23)	(25)
Maturities		(20)		(20)
Settlements	(21)	(115)	(135)	(148)
Total	(33)	(120)	(31)	(140)
Equity Securities [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances		20	6	21
Sales			(9)	(1)
Total		20	(3)	20
Derivative Investments [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances		126	174	374
Sales		(177)	(124)	(395)
Maturities		(138)	(182)	(305)
Total		(189)	(132)	(326)
Indexed Annuity Ceded Embedded Derivatives [Member] | Other Assets [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	19	4	22
Settlements	(25)	(427)	(82)
Total	(6)	(423)	(60)
Indexed Annuity And IUL Contracts [Member] | Future Contract Benefits [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	(47)	(88)	(155)	(170)
Settlements	133	72	291	155
Total	$ 86	$ (16)	$ 136	$ (15)

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