Deferred Policy Acquisition Costs - Rollforward of DSI (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Movement in Deferred Sales Inducements [Roll Forward]
Other assets, excluding DSI	$ 11,800	$ 12,400
Life and Retirement
Movement in Deferred Sales Inducements [Roll Forward]
Balance, beginning of year	497	558
Capitalization	1	2
Amortization expense	(16)	(17)
Balance, end of period	482	543
Life and Retirement | Individual Retirement
Movement in Deferred Sales Inducements [Roll Forward]
Balance, beginning of year	333	381
Capitalization	1	2
Amortization expense	(13)	(14)
Balance, end of period	321	369
Life and Retirement | Group Retirement
Movement in Deferred Sales Inducements [Roll Forward]
Balance, beginning of year	164	177
Capitalization	0	0
Amortization expense	(3)	(3)
Balance, end of period	$ 161	$ 174