Investments - Available-For-Sale Impairment Losses Recognized in Earnings (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Available-For-Sale Impairment Losses [Abstract]
Impairment losses recognized in earnings	$ 17	$ 20	$ 25	$ 30
Mortgage Receivable
Available-For-Sale Impairment Losses [Abstract]
Gain (loss) on mortgage loans due to changes in expected credit losses	6	0	6	0
Corporate and other bonds
Available-For-Sale Impairment Losses [Abstract]
Impairment losses recognized in earnings	9	21	17	29
Asset-backed
Available-For-Sale Impairment Losses [Abstract]
Impairment losses recognized in earnings	$ 8	$ (1)	$ 8	$ 1