Accounts and Notes Receivable and Credit Quality of Receivables - Components of Accounts and Notes Receivable, Net (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Current:
Receivables	$ 685	$ 791
Allowance for credit losses	(61)	(36)
Current receivables, net	624	755
Long-term:
Receivables	48	53
Total receivables, net	672	808
Financing Receivable, Allowance for Credit Losses	70	42	$ 38	$ 40
Financing Receivable, Gross	57	53
Financing Receivable, Allowance for Credit Loss, Noncurrent	$ 9	$ 0