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Fair Value of Financial Instruments (Schedule Of Investment Holdings Movements) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	$ 653	$ 484	$ 1,383	$ 1,032
Sales	(85)	(198)	(279)	(420)
Maturities	(15)	(91)	(212)	(200)
Settlements	(340)	(480)	(367)	(535)
Calls		(29)	(17)	(78)
Total	213	(314)	508	(201)
Other Assets [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances				17
Settlements				(469)
Total				(452)
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	410	193	707	529
Sales	(13)	(99)	(17)	(172)
Maturities	(6)	(36)	(21)	(34)
Settlements	(176)	(43)	(267)	(94)
Calls		(29)	(17)	(78)
Total	215	(14)	385	151
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)		(5)
Total	(5)		(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	14		14
Total	14		14
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		8
Total	8		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	168	242	368	279
Settlements	(69)	(6)	(86)	(21)
Total	99	236	282	258
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	6		6
Sales		(4)	(20)	(4)
Total	6	(4)	(14)	(4)
Mortgage Loans On Real Estate [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	9		81
Sales	(66)		(101)
Maturities	(4)		(4)
Total	(61)		(24)
Trading Securities [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	36	1	124	38
Sales	(5)		(8)	(25)
Settlements	(95)	(15)	(114)	(33)
Total	(64)	(14)	2	(20)
Equity Securities [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	2	1	6	1
Sales	(1)	(1)	(9)	(1)
Total	$ 1		(3)
Derivative Investments [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances		131	174	249
Sales		(94)	(124)	(218)
Maturities		(55)	(182)	(166)
Total		(18)	(132)	(135)
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		8	3
Settlements		(447)	(58)
Total		(439)	(55)
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		(92)	(108)	(81)
Settlements		31	158	82
Total		$ (61)	$ 50	$ 1

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