Adoption Of ASU 2018-12 (Summary Of Restated Consolidated Balance Sheets) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Dec. 31, 2020
Deferred acquisition costs, value of business acquired and deferred sales inducements	$ 12,341	$ 12,235
Reinsurance recoverables, net of allowance for credit losses	18,389	19,443
Market risk benefit assets	4,108	2,807
Other assets	20,223	18,802
Total assets	338,411	334,217
Policyholder account balances	117,210	114,435
Future contract benefits		38,826
Market risk benefit liabilities	1,385	2,078
Deferred front-end loads	5,653	5,052
Other liabilities	11,841	12,021
Total liabilities	335,212	329,115
Retained earnings	6,102	5,924
Accumulated other comprehensive income (loss)	(8,480)	(6,352)
Total stockholders' equity	3,199	5,102	$ 2,783
Accounting Standards Update 2018-12 [Member]
Reinsurance recoverables, net of allowance for credit losses	3,038			$ 19,388
Other assets	242
Future contract benefits	(3,932)			42,828
Deferred front-end loads	(3,190)			3,591
Other liabilities	$ 417
Total stockholders' equity			2,783
Accounting Standards Update 2018-12 [Member] | As Previously Reported [Member]
Deferred acquisition costs, value of business acquired and deferred sales inducements		13,803
Reinsurance recoverables, net of allowance for credit losses		19,882		16,350
Other assets		20,493
Total assets		335,108
Future contract benefits		41,756		38,896
Deferred front-end loads		5,669		$ 401
Other liabilities		11,976
Total liabilities		330,539
Retained earnings		6,707
Accumulated other comprehensive income (loss)		(7,668)
Total stockholders' equity		4,569	2,668
Accounting Standards Update 2018-12 [Member] | Restatement Impacts [Member]
Deferred acquisition costs, value of business acquired and deferred sales inducements		(1,568)
Reinsurance recoverables, net of allowance for credit losses		(439)
Market risk benefit assets		2,807
Other assets		(1,691)
Total assets		(891)
Future contract benefits		(2,930)
Market risk benefit liabilities		2,078
Deferred front-end loads		(617)
Other liabilities		45
Total liabilities		(1,424)
Retained earnings		(783)
Accumulated other comprehensive income (loss)		1,316
Total stockholders' equity		$ 533	$ 115