Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Investments with no credit impairment, tax	$ (31)	$ 20	$ 46
Investments with credit impairment, tax	$ 2	$ (4)	$ (14)