Adoption of ASU 2018-12 (Summary of Balances of LFPB Liability for Future Claims) (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022	Dec. 31, 2020
Reinsurance recoverables	$ 19,030	$ 19,443
Accounting Standards Update 2018-12 [Member]
Reinsurance recoverables	3,038		$ 19,388
Accounting Standards Update 2018-12 [Member] | As Previously Reported [Member]
Reinsurance recoverables		$ 19,882	16,350
Accounting Standards Update 2018-12 [Member] | Single A Discount Rate Measurement in AOCI [Member]
Reinsurance recoverables			2,431
Accounting Standards Update 2018-12 [Member] | Retained Earnings [Member]
Reinsurance recoverables	$ 607
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2018-12 [Member] | Retained Earnings [Member]
Reinsurance recoverables			607
Other Operations [Member] | Accounting Standards Update 2018-12 [Member]
Reinsurance recoverables			790
Other Operations [Member] | Accounting Standards Update 2018-12 [Member] | As Previously Reported [Member]
Reinsurance recoverables			790
Traditional Life [Member] | Accounting Standards Update 2018-12 [Member]
Reinsurance recoverables			906
Traditional Life [Member] | Accounting Standards Update 2018-12 [Member] | As Previously Reported [Member]
Reinsurance recoverables			755
Traditional Life [Member] | Accounting Standards Update 2018-12 [Member] | Single A Discount Rate Measurement in AOCI [Member]
Reinsurance recoverables			151
UL and Other [Member] | Accounting Standards Update 2018-12 [Member]
Reinsurance recoverables			332
UL and Other [Member] | Accounting Standards Update 2018-12 [Member] | As Previously Reported [Member]
Reinsurance recoverables			335
UL and Other [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2018-12 [Member] | Retained Earnings [Member]
Reinsurance recoverables			(3)
Group Protection [Member] | Accounting Standards Update 2018-12 [Member]
Reinsurance recoverables			162
Group Protection [Member] | Accounting Standards Update 2018-12 [Member] | As Previously Reported [Member]
Reinsurance recoverables			148
Group Protection [Member] | Accounting Standards Update 2018-12 [Member] | Single A Discount Rate Measurement in AOCI [Member]
Reinsurance recoverables			14
Other Operations [Member] | Accounting Standards Update 2018-12 [Member]
Reinsurance recoverables			17,196
Other Operations [Member] | Accounting Standards Update 2018-12 [Member] | As Previously Reported [Member]
Reinsurance recoverables			14,320
Other Operations [Member] | Accounting Standards Update 2018-12 [Member] | Single A Discount Rate Measurement in AOCI [Member]
Reinsurance recoverables			2,266
Other Operations [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2018-12 [Member] | Retained Earnings [Member]
Reinsurance recoverables			610
Payout Annuities [Member] | Accounting Standards Update 2018-12 [Member]
Reinsurance recoverables			2
Payout Annuities [Member] | Accounting Standards Update 2018-12 [Member] | As Previously Reported [Member]
Reinsurance recoverables			2
Protective [Member] | Other Operations [Member] | Accounting Standards Update 2018-12 [Member]
Reinsurance recoverables			13,200
Protective [Member] | Other Operations [Member] | Accounting Standards Update 2018-12 [Member] | As Previously Reported [Member]
Reinsurance recoverables			12,000
Swiss Re [Member] | Other Operations [Member] | Accounting Standards Update 2018-12 [Member]
Reinsurance recoverables			2,600
Swiss Re [Member] | Other Operations [Member] | Accounting Standards Update 2018-12 [Member] | As Previously Reported [Member]
Reinsurance recoverables			$ 1,300