DAC - Rollforward of DAC Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of year	$ 637	$ 477	$ 471
Capitalization of commissions, sales and issue expenses	129	122	95
Amortization:
Impact of assumptions updates and model changes	14	(4)	(8)
All other	(62)	(21)	(23)
Total amortization	(48)	(25)	(31)
Change in unrealized investment gains and losses	199	63	(58)
Balance, end of year	$ 917	$ 637	$ 477