CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (PARENTHETICAL) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income tax expense	$ 668	$ 450	$ 503
ACCUMULATED DEFICIT
Income tax expense			2	$ 37
ACCUMULATED DEFICIT | Cumulative Effect, Period of Adoption, Adjustment
Income tax expense			$ 2	$ (37)