Condensed Consolidated Statements of Stockholders' Equity (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Stockholders' Equity [Abstract]
Dividends declared (usd per share)	$ 0.86	$ 0.84	$ 2.54	$ 2.44
Net earnings attributable to noncontrolling interests	$ 1	$ 1	$ 2	$ 3