Adoption of ASU 2018-12 (Summary of Changes in Future Contract Benefits) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2020
LFPB	$ 39,245	$ 38,302
Accounting Standards Update 2018-12 [Member]
LFPB			$ 42,044
Accounting Standards Update 2018-12 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
LFPB			3,726
Traditional Life [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			3,912
Annuities Segment [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			2,667
UL and Other [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			12,264
Group Protection Segment [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			5,939
Other Operations [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			13,737
All Other [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			3,525
Retained Earnings [Member] | Accounting Standards Update 2018-12 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
LFPB			760
Retained Earnings [Member] | Traditional Life [Member] | Accounting Standards Update 2018-12 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
LFPB			(2)
Retained Earnings [Member] | Annuities Segment [Member] | Accounting Standards Update 2018-12 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
LFPB			44
Retained Earnings [Member] | UL and Other [Member] | Accounting Standards Update 2018-12 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
LFPB			92
Retained Earnings [Member] | Other Operations [Member] | Accounting Standards Update 2018-12 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
LFPB			626
Protective [Member] | Other Operations [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			7,400
Swiss Re [Member] | Other Operations [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			3,300
As Previously Reported [Member] | Accounting Standards Update 2018-12 [Member]
LFPB		$ 41,203	38,318
As Previously Reported [Member] | Traditional Life [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			3,062
As Previously Reported [Member] | Annuities Segment [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			2,313
As Previously Reported [Member] | UL and Other [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			13,687
As Previously Reported [Member] | Group Protection Segment [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			5,422
As Previously Reported [Member] | Other Operations [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			10,309
As Previously Reported [Member] | All Other [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			3,525
As Previously Reported [Member] | Protective [Member] | Other Operations [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			6,300
As Previously Reported [Member] | Swiss Re [Member] | Other Operations [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			1,800
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] | Annuities Segment [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			(105)
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)
Single A Discount Rate Measurement in AOCI [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			4,666
Single A Discount Rate Measurement in AOCI [Member] | Traditional Life [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			852
Single A Discount Rate Measurement in AOCI [Member] | Annuities Segment [Member] | Accounting Standards Update 2018-12 [Member]
LFPB			415
Single A Discount Rate Measurement in AOCI [Member] | Group Protection Segment [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			$ 2,882