Condensed Consolidated Statements of Stockholders' (Deficit) Equity (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Stockholders' Equity [Abstract]
Dividends declared (usd per share)	$ 0.90	$ 0.86	$ 2.62	$ 2.54
Net earnings attributable to noncontrolling interests	$ 2	$ 1	$ 4	$ 2