Investments - Schedule of Credit Losses Recognized in Net Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Realized capital gains and losses by asset type
Commitments to fund line of credit, commercial mortgage loans and bank loans	$ 0	$ 0	$ (15)	$ 1
Total	(4)	(16)	(80)	(131)
Fixed income securities
Realized capital gains and losses by asset type
Total credit losses by asset type	1	(5)	0	(1)
Corporate
Realized capital gains and losses by asset type
Total credit losses by asset type	1	(5)	0	(1)
Mortgage loans
Realized capital gains and losses by asset type
Total credit losses by asset type	0	1	0	1
Limited partnership interests
Realized capital gains and losses by asset type
Total credit losses by asset type	(4)	(16)	(4)	(16)
Bank loans
Realized capital gains and losses by asset type
Total credit losses by asset type	(1)	2	(9)	5
Real estate
Realized capital gains and losses by asset type
Total credit losses by asset type	0	2	0	2
Other assets
Realized capital gains and losses by asset type
Total credit losses by asset type	$ 0	$ 0	$ (52)	$ (123)