Adoption of ASU 2018-12 (Summary of Changes in DFEL) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
DFEL	$ 5,244	$ 5,045
Accounting Standards Update 2018-12 [Member]
DFEL					$ 3,586
UL and Other [Member]
DFEL	4,936	4,735	$ 4,735	$ 3,902
UL and Other [Member] | Accounting Standards Update 2018-12 [Member]
DFEL					3,262
As Previously Reported [Member] | Accounting Standards Update 2018-12 [Member]
DFEL		5,695			396
As Previously Reported [Member] | UL and Other [Member] | Accounting Standards Update 2018-12 [Member]
DFEL					77
Restatement Adjustments [Member] | Accounting Standards Update 2018-12 [Member]
DFEL					3,190
Restatement Adjustments [Member] | UL and Other [Member] | Accounting Standards Update 2018-12 [Member]
DFEL					3,185
Variable Annuities [Member]
DFEL	$ 308	$ 310	$ 310	$ 318
Variable Annuities [Member] | Accounting Standards Update 2018-12 [Member]
DFEL					324
Variable Annuities [Member] | As Previously Reported [Member] | Accounting Standards Update 2018-12 [Member]
DFEL					319
Variable Annuities [Member] | Restatement Adjustments [Member] | Accounting Standards Update 2018-12 [Member]
DFEL					$ 5