Investments - Available-For-Sale Impairment Losses Recognized in Earnings (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Available-For-Sale Impairment Losses [Abstract]
(Gain) loss on mortgage loans due to changes in expected credit losses		$ 0	$ 0	$ 0
Available-for-sale Securities
Available-For-Sale Impairment Losses [Abstract]
Impairment losses recognized in earnings	$ 20	(1)	30	5
Corporate and other bonds | Available-for-sale Securities
Available-For-Sale Impairment Losses [Abstract]
Impairment losses recognized in earnings	21	(2)	29	5
Asset-backed | Available-for-sale Securities
Available-For-Sale Impairment Losses [Abstract]
Impairment losses recognized in earnings	(1)	$ 1	$ 1
Collateralized Mortgage Backed Securities
Available-For-Sale Impairment Losses [Abstract]
(Gain) loss on mortgage loans due to changes in expected credit losses	$ 0