Investments - Schedule of Credit Losses Recognized in Net Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Other-than-temporary impairment losses by asset type
Total fixed income securities	$ (146)	$ (99)	$ (54)
Total credit losses by asset type	(147)	(98)	(54)
Commitments to fund commercial mortgage loans and bank loans	1	(1)	0
Fixed income securities
Other-than-temporary impairment losses by asset type
Total fixed income securities	(3)	(22)	(7)
Municipal
Other-than-temporary impairment losses by asset type
Total fixed income securities	(2)	0	0
Corporate
Other-than-temporary impairment losses by asset type
Total fixed income securities	(1)	(24)	(6)
ABS
Other-than-temporary impairment losses by asset type
Total fixed income securities	0	2	(1)
Mortgage loans
Other-than-temporary impairment losses by asset type
Total credit losses by asset type	(1)	(4)	(1)
Limited partnership interests
Other-than-temporary impairment losses by asset type
Total credit losses by asset type	(24)	(25)	(4)
Bank loans, net
Other-than-temporary impairment losses by asset type
Total credit losses by asset type	6	(18)	(26)
Real estate
Other-than-temporary impairment losses by asset type
Total credit losses by asset type	(2)	(29)	(16)
Other assets
Other-than-temporary impairment losses by asset type
Total credit losses by asset type	$ (123)	$ 0	$ 0