Adoption of ASU 2018-12 (Effect of Accounting Adoption to Consolidated Balance Sheets) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reinsurance recoverables	$ 19,309	$ 19,443
Other assets	19,280	18,802
Future contract benefits		38,826
DFEL	5,250	5,052
Other liabilities	11,562	12,021
Total	6,732	5,102	$ 14,255
Retained Earnings [Member]
Total	4,940	5,924	6,354	$ 5,196
Accumulated Other Comprehensive Income (Loss) [Member]
Total	(3,754)	$ (6,352)	$ 3,315	$ 9,984
Accounting Standards Update 2018-12 [Member]
DAC, VOBA and DSI	6,079				$ 12,104
Reinsurance recoverables	3,038				19,388
Other assets	242
Future contract benefits	(3,932)				42,828
MRBs, net	(4,300)				5,334
DFEL	(3,190)				3,591
Other liabilities	417
Accounting Standards Update 2018-12 [Member] | Retained Earnings [Member]
Reinsurance recoverables	607
Other assets	242
Future contract benefits	(844)
MRBs, net	(7,956)
Other liabilities	1,678
Accounting Standards Update 2018-12 [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
DAC, VOBA and DSI	6,079
Reinsurance recoverables	2,431
Future contract benefits	(3,088)
MRBs, net	3,656
DFEL	(3,190)
Other liabilities	$ (1,261)
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2018-12 [Member]
Total					(1,646)
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2018-12 [Member] | Retained Earnings [Member]
Reinsurance recoverables					607
Future contract benefits					844
Total					(6,273)
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2018-12 [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
Total					$ 4,627