Investments - Schedule of Credit Losses Recognized in Net Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Other-than-temporary impairment losses by asset type
Commitments to fund line of credit, commercial mortgage loans and bank loans	$ (15)	$ 1	$ (1)
Total	(110)	(146)	(99)
Fixed income securities
Other-than-temporary impairment losses by asset type
Total credit losses by asset type	(5)	(3)	(22)
Municipal
Other-than-temporary impairment losses by asset type
Total credit losses by asset type	0	(2)	0
Corporate
Other-than-temporary impairment losses by asset type
Total credit losses by asset type	(4)	(1)	(24)
ABS
Other-than-temporary impairment losses by asset type
Total credit losses by asset type	(1)	0	2
Mortgage loans
Other-than-temporary impairment losses by asset type
Total credit losses by asset type	(2)	(1)	(4)
Limited partnership interests
Other-than-temporary impairment losses by asset type
Total credit losses by asset type	(12)	(24)	(25)
Bank loans, net
Other-than-temporary impairment losses by asset type
Total credit losses by asset type	(12)	6	(18)
Real estate
Other-than-temporary impairment losses by asset type
Total credit losses by asset type	(12)	(2)	(29)
Other assets
Other-than-temporary impairment losses by asset type
Total credit losses by asset type	$ (52)	$ (123)	$ 0