Investments - Schedule of Net Gains (Losses) on Investments and Derivatives by Asset Type (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	$ (300)	$ (1,072)	$ 1,084
Fixed income securities
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	(540)	(875)	425
Equity securities
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	282	(900)	520
Mortgage loans
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	(4)	(1)	20
Limited partnership interests
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	4	(191)	(52)
Derivatives
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	(84)	874	49
Other investments
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	$ 42	$ 21	$ 122