Property and Equipment - Summary of Property and Equipment (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property and equipment	$ 4,190	$ 3,774
Less: accumulated depreciation and amortization	(1,585)	(1,110)
Total property and equipment, net	2,605	2,664
Land
Property, Plant and Equipment [Line Items]
Property and equipment	356	410
Buildings and leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment	555	558
Vehicles, tractors, trailers and tankers
Property, Plant and Equipment [Line Items]
Property and equipment	1,561	1,464
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property and equipment	809	648
Computer software and equipment
Property, Plant and Equipment [Line Items]
Property and equipment	$ 909	$ 694