Supplemental Balance Sheet Information (Details) $ in Millions	Jun. 30, 2019 USD ($) days	Dec. 31, 2018 USD ($)
Accounts and Notes Receivable [Abstract]
Number of days from the period in which the corresponding sales occur that trade receivables are generally due | days	30
Accounts and notes receivable, gross	$ 580	$ 592
Allowance for doubtful accounts	(45)	(31)
Accounts and notes receivable, net	$ 535	$ 561