Investments - Schedule of Net Gains (Losses) on Investments and Derivatives by Asset Type (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	$ (103)	$ (151)	$ (267)	$ (137)
Fixed income securities
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	(96)	(132)	(197)	(268)
Equity securities
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	14	21	76	188
Mortgage loans
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	1	(3)	1	(3)
Limited partnership interests
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	(13)	(15)	(5)	7
Derivatives
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	(15)	(7)	(23)	(59)
Other investments
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	6	(15)	4	(2)
Other assets
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	$ 0	$ 0	$ (123)	$ 0