Investments - Schedule of Net Gains (Losses) on Investments and Derivatives by Asset Type (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	$ (86)	$ (167)	$ (223)	$ (1,167)
Fixed income securities
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	(129)	(166)	(397)	(644)
Equity securities
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	(35)	(239)	153	(1,222)
Mortgage loans
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	(1)	1	(4)	0
Limited partnership interests
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	(6)	(49)	1	(224)
Derivatives
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	31	299	(28)	889
Other investments
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	$ 54	$ (13)	$ 52	$ 34