Condensed Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Accounts receivable, allowance for credit loss	$ 156	$ 83
Accumulated depreciation	$ 1,154	$ 1,082
Preferred stock, par value (in usd per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	125,000,000	125,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in usd per share)	$ 0.01
Common stock, shares authorized (in shares)	2,000,000,000
Common stock, shares outstanding (in shares)	433,200,000
Common stock, shares issued (in shares)	433,200,000