Adoption of ASU 2018-12 (Summary of Effect on Previously Reported Consolidated Statements of Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenues
Fee income	$ 1,305	$ 1,324	$ 3,934	$ 4,065
Realized gain (loss)	(867)	33	(4,513)	541
Total revenues	3,577	4,265	8,841	13,355
Expenses
Benefits	1,895	2,094	5,766	6,118
Interest credited	827	722	2,412	2,121
Market risk benefit (gain) loss	(1,014)	(74)	(1,182)	755
Policyholder liability remeasurement (gain) loss	157	2,370	(70)	2,496
Commissions and other expenses	1,275	1,219	3,805	3,591
Total expenses	3,225	7,045	10,974	15,929
Income (loss) before taxes	352	(2,780)	(2,133)	(2,574)
Federal income tax expense (benefit)	37	(488)	(564)	(500)
Net income (loss)	315	(2,292)	(1,569)	(2,074)
Other comprehensive income (loss), net of tax:
Unrealized investment gain (loss)	(2,807)	(4,909)	1,088	(18,727)
Market risk benefit gain (loss)		(150)		224
Policyholder liability discount rate remeasurement gain (loss)	345	517	257	1,943
Total other comprehensive income (loss), net of tax	(3,306)	(4,542)	603	(16,560)
Comprehensive income (loss)	$ (2,991)	(6,834)	$ (966)	(18,634)
Accounting Standards Update 2018-12 [Member] | As Previously Reported [Member]
Revenues
Fee income		1,438		4,384
Realized gain (loss)		11		338
Total revenues		4,357		13,471
Expenses
Benefits		4,498		8,748
Interest credited		717		2,109
Commissions and other expenses		1,205		3,473
Total expenses		7,134		15,179
Income (loss) before taxes		(2,777)		(1,708)
Federal income tax expense (benefit)				(320)
Net income (loss)		(2,289)		(1,388)
Other comprehensive income (loss), net of tax:
Unrealized investment gain (loss)		(4,140)		(14,577)
Total other comprehensive income (loss), net of tax		(4,140)		(14,577)
Comprehensive income (loss)		(6,429)		(15,965)
Accounting Standards Update 2018-12 [Member] | Restatement Impacts [Member]
Revenues
Fee income		(114)		(319)
Realized gain (loss)		22		203
Total revenues		(92)		(116)
Expenses
Benefits		(2,404)		(2,630)
Interest credited		5		12
Market risk benefit (gain) loss		(74)		755
Policyholder liability remeasurement (gain) loss		2,370		2,496
Commissions and other expenses		14		118
Total expenses		(89)		750
Income (loss) before taxes		(3)		(866)
Federal income tax expense (benefit)				(180)
Net income (loss)		(3)		(686)
Other comprehensive income (loss), net of tax:
Unrealized investment gain (loss)		(769)		(4,150)
Market risk benefit gain (loss)		(150)		224
Policyholder liability discount rate remeasurement gain (loss)		517		1,943
Total other comprehensive income (loss), net of tax		(402)		(1,983)
Comprehensive income (loss)		$ (405)		$ (2,669)