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, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	$ (545)	$ 252	$ 105	$ (241)
Fixed income securities
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	(401)	107	(517)	(271)
Equity securities
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	(74)	191	703	243
Mortgage loans
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	1	(6)	(2)	(6)
Limited partnership interests
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	0	(32)	4	(24)
Derivatives
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	(41)	6	(73)	(78)
Other investments
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives	$ (30)	(14)	$ (10)	(105)
Other investments \| Variable Interest Entity, Primary Beneficiary
Realized capital gains and losses by asset type
Net gains (losses) on investments and derivatives		$ (67)		$ (67)