Adoption of ASU 2018-12 (Summary of Changes in Net Liability Position of MRBs) (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022	Dec. 31, 2020
Accounting Standards Update 2018-12 [Member]
MRBs, net	$ (4,300)		$ 5,334
Accounting Standards Update 2018-12 [Member] | As Previously Reported [Member]
MRBs, net			1,034
Accounting Standards Update 2018-12 [Member] | Retained Earnings [Member]
MRBs, net	(7,956)
Accounting Standards Update 2018-12 [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
MRBs, net	3,656
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2018-12 [Member] | Retained Earnings [Member] | Cumulative Effects to Retained Earnings [Member]
MRBs, net			7,956
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2018-12 [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Cumulative Effects to Credit Risk to AOCI [Member]
MRBs, net			(3,656)
Variable Annuities [Member]
MRBs, net	4,783	$ 7,974
Variable Annuities [Member] | Accounting Standards Update 2018-12 [Member]
MRBs, net			5,207
Variable Annuities [Member] | Accounting Standards Update 2018-12 [Member] | As Previously Reported [Member]
MRBs, net			831
Variable Annuities [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2018-12 [Member] | Retained Earnings [Member] | Cumulative Effects to Retained Earnings [Member]
MRBs, net			7,968
Variable Annuities [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2018-12 [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Cumulative Effects to Credit Risk to AOCI [Member]
MRBs, net			(3,592)
Fixed Annuities [Member]
MRBs, net	213	171
Fixed Annuities [Member] | Accounting Standards Update 2018-12 [Member]
MRBs, net			118
Fixed Annuities [Member] | Accounting Standards Update 2018-12 [Member] | As Previously Reported [Member]
MRBs, net			192
Fixed Annuities [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2018-12 [Member] | Retained Earnings [Member] | Cumulative Effects to Retained Earnings [Member]
MRBs, net			(22)
Fixed Annuities [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2018-12 [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Cumulative Effects to Credit Risk to AOCI [Member]
MRBs, net			(52)
Retirement Plan Services [Member]
MRBs, net	$ 6	$ 15
Retirement Plan Services [Member] | Accounting Standards Update 2018-12 [Member]
MRBs, net			9
Retirement Plan Services [Member] | Accounting Standards Update 2018-12 [Member] | As Previously Reported [Member]
MRBs, net			11
Retirement Plan Services [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2018-12 [Member] | Retained Earnings [Member] | Cumulative Effects to Retained Earnings [Member]
MRBs, net			10
Retirement Plan Services [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2018-12 [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Cumulative Effects to Credit Risk to AOCI [Member]
MRBs, net			$ (12)