Consolidated Statements of 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]
Dividends declared per common share (USD per share)	$ 0.67	$ 0.57	$ 2.01	$ 1.71
Net income (loss) attributable to noncontrolling interest	$ 40	$ 44	$ 136	$ 128