Accounts Payable and Other Current Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Accounts Payable and Other Current Liabilities [Abstract]
Accounts payable	$ 438	$ 343
Accrued sales and use taxes	244	206
Deferred revenue – current	234	114
Accrued Sales Commission, Current	105	86
Employee-related Liabilities, Current	169	173
Public liability and property damage insurance liabilities, current	148	141
Other	511	425
Accounts payable and other current liabilities	$ 1,849	$ 1,488