Consolidated Statements of Equity (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Stockholders' Equity [Abstract]
Dividends declared per common share (USD per share)	$ 0.67	$ 0.57	$ 1.34	$ 1.14
Net income (loss) attributable to noncontrolling interest	$ 46	$ 44	$ 95	$ 84