Credit Losses (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($)
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
January 1, 2020	$ 22
Current-period provision for credit losses	33
Accounts Receivable, Allowance for Credit Loss, Writeoff	4
Foreign currency impact	(1)
March 31, 2020	$ 50