Adoption of ASU 2018-12 (Summary of Effect on Previously Reported Consolidated Statements of Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenues
Fee income	$ 1,321	$ 1,393
Realized gain (loss)	(394)	360
Total revenues	4,017	4,675
Expenses
Benefits	2,195	2,102
Interest credited	781	693
Market risk benefit (gain) loss	1,071	113
Policyholder liability remeasurement (gain) loss	(118)	41
Commissions and other expenses	1,248	1,213
Total expenses	5,247	4,222
Income (loss) before taxes	(1,230)	453
Federal income tax expense (benefit)	(302)	63
Net income (loss)	(928)	390
Other comprehensive income (loss), net of tax:
Unrealized investment gain (loss)	1,777	(7,300)
Market risk benefit gain (loss)		20
Policyholder liability remeasurement gain (loss)	(190)	759
Total other comprehensive income (loss), net of tax	2,613	(6,522)
Comprehensive income (loss)	$ 1,685	(6,132)
Accounting Standards Update 2018-12 [Member] | As Previously Reported [Member]
Revenues
Fee income		1,502
Realized gain (loss)		257
Total revenues		4,681
Expenses
Benefits		2,199
Interest credited		691
Commissions and other expenses		1,191
Total expenses		4,141
Income (loss) before taxes		540
Federal income tax expense (benefit)		82
Net income (loss)		458
Other comprehensive income (loss), net of tax:
Unrealized investment gain (loss)		(4,990)
Total other comprehensive income (loss), net of tax		(4,991)
Comprehensive income (loss)		(4,533)
Accounting Standards Update 2018-12 [Member] | Restatement Impacts [Member]
Revenues
Fee income		(109)
Realized gain (loss)		103
Total revenues		(6)
Expenses
Benefits		(97)
Interest credited		2
Market risk benefit (gain) loss		113
Policyholder liability remeasurement (gain) loss		41
Commissions and other expenses		22
Total expenses		81
Income (loss) before taxes		(87)
Federal income tax expense (benefit)		(19)
Net income (loss)		(68)
Other comprehensive income (loss), net of tax:
Unrealized investment gain (loss)		(2,310)
Market risk benefit gain (loss)		20
Policyholder liability remeasurement gain (loss)		759
Total other comprehensive income (loss), net of tax		(1,531)
Comprehensive income (loss)		$ (1,599)