Condensed Consolidated Statements of Changes in Equity (unaudited) (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]
Common stock, par value (in USD per share)	$ 0.01		$ 0.01
Other comprehensive income (loss), taxes	$ (3)	$ 3	$ (7)	$ (6)
Dividends declared (in usd per share)	$ 0.44	$ 0.44	$ 1.32	$ 1.32