Accounts Payable and Other Current Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Accounts Payable and Other Current Liabilities [Abstract]
Accounts payable	$ 426	$ 343
Accrued sales and use taxes	329	206
Accrued Sales Commission, Current	126	86
Employee-related Liabilities, Current	172	173
Deferred Revenue, Current	154	114
Public liability and property damage insurance liabilities, current	141	141
Other	518	425
Accounts payable and other current liabilities	$ 1,866	$ 1,488