Adoption of ASU 2018-12 (Summary of Changes in Future Contract Benefits) (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022	Dec. 31, 2020
LFPB		$ 38,826
Accounting Standards Update 2018-12 [Member]
LFPB	$ (3,932)		$ 42,828
Accounting Standards Update 2018-12 [Member] | Retained Earnings [Member]
LFPB	$ (844)
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2018-12 [Member] | Retained Earnings [Member]
LFPB			844
Other Operations [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			3,565
Traditional Life [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			4,426
UL and Other [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			12,308
UL and Other [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2018-12 [Member] | Retained Earnings [Member]
LFPB			174
Group Protection [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			5,939
Other Operations [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			13,922
Other Operations [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2018-12 [Member] | Retained Earnings [Member]
LFPB			626
Payout Annuities [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			2,668
Payout Annuities [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2018-12 [Member] | Retained Earnings [Member]
LFPB			44
As Previously Reported [Member] | Accounting Standards Update 2018-12 [Member]
LFPB		$ 41,756	38,896
As Previously Reported [Member] | Other Operations [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			3,565
As Previously Reported [Member] | Traditional Life [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			3,483
As Previously Reported [Member] | UL and Other [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			13,649
As Previously Reported [Member] | Group Protection [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			5,422
As Previously Reported [Member] | Other Operations [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			10,463
As Previously Reported [Member] | Payout Annuities [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			2,314
Impact from Removal of Shadow Balances from AOCI [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			(1,700)
Impact from Removal of Shadow Balances from AOCI [Member] | UL and Other [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			(1,515)
Impact from Removal of Shadow Balances from AOCI [Member] | Other Operations [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			(80)
Impact from Removal of Shadow Balances from AOCI [Member] | Payout Annuities [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			(105)
Single A Discount Rate Measurement in AOCI [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			4,788
Single A Discount Rate Measurement in AOCI [Member] | Traditional Life [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			943
Single A Discount Rate Measurement in AOCI [Member] | Group Protection [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			517
Single A Discount Rate Measurement in AOCI [Member] | Other Operations [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			2,913
Single A Discount Rate Measurement in AOCI [Member] | Payout Annuities [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			415
Protective [Member] | Other Operations [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			7,400
Protective [Member] | As Previously Reported [Member] | Other Operations [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			6,300
Swiss Re [Member] | Other Operations [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			3,500
Swiss Re [Member] | As Previously Reported [Member] | Other Operations [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			$ 2,000