Investments - Schedule of Credit Losses Recognized in Net Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Other-than-temporary impairment losses by asset type
Total fixed income securities	$ (99)	$ (54)	$ (42)
Total credit losses by asset type	(98)	(54)	(42)
Commitments to fund commercial mortgage loans and bank loans	(1)	0	0
Fixed income securities
Other-than-temporary impairment losses by asset type
Total fixed income securities	(22)	(7)	(4)
Corporate
Other-than-temporary impairment losses by asset type
Total fixed income securities	(24)	(6)	(5)
ABS
Other-than-temporary impairment losses by asset type
Total fixed income securities	2	(1)	1
Mortgage loans
Other-than-temporary impairment losses by asset type
Total credit losses by asset type	(4)	(1)	18
Limited partnership interests
Other-than-temporary impairment losses by asset type
Total credit losses by asset type	(25)	(4)	(34)
Bank loans, net
Other-than-temporary impairment losses by asset type
Total credit losses by asset type	(18)	(26)	(22)
Real estate
Other-than-temporary impairment losses by asset type
Total credit losses by asset type	$ (29)	$ (16)	$ 0