Adoption of ASU 2018-12 (Cumulative Effect Adjustments to Components of Stockholders' Equity) (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022	Dec. 31, 2020
MRBs	$ 1,548	$ 2,078
Accounting Standards Update 2018-12 [Member]
Total	(1,646)
Accounting Standards Update 2018-12 [Member] | Retained Earnings [Member]
Total	(6,273)
Accounting Standards Update 2018-12 [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
Total	$ 4,627
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2018-12 [Member]
DAC, VOBA, DSI and DFEL			$ 2,271
Additional liabilities for other insurance benefits			1,197
Liability for future policy benefits and other			(1,902)
MRBs			(3,212)
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2018-12 [Member] | Retained Earnings [Member]
Liability for future policy benefits and other			(187)
MRBs			(6,086)
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2018-12 [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
DAC, VOBA, DSI and DFEL			2,271
Additional liabilities for other insurance benefits			1,197
Liability for future policy benefits and other			(1,715)
MRBs			$ 2,874