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, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	$ 243	$ (86)	$ (24)	$ (223)
Fixed income securities
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	105	(129)	(92)	(397)
Equity securities
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	119	(35)	195	153
Mortgage loans
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	(1)	(1)	0	(4)
Limited partnership interests
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	(8)	(6)	(13)	1
Derivatives
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	20	31	(3)	(28)
Other investments
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	8	54	12	52
Other
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	$ 0	$ 0	$ (123)	$ 0