Adoption Of ASU 2018-12 (Effect Of Accounting Adoption To Consolidated Balance Sheets) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021	Dec. 31, 2020
Reinsurance recoverables	$ 18,389		$ 19,443
Other assets	20,223		18,802
Future contract benefits			38,826
DFEL	5,653		5,052
Other liabilities	11,841		12,021
Total	3,199		5,102	$ 2,783
Retained Earnings [Member]
Total	6,102	$ 5,362	5,924	5,189	$ 7,065	$ 5,196
Accumulated Other Comprehensive Income (Loss) [Member]
Total	(8,480)	$ (5,104)	$ (6,352)	(6,940)	(2,280)	$ 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
Total				2,783
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
Total				5,189	7,065
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)
Total				$ (6,940)	$ (2,280)
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