Property and Equipment

12 Months Ended

Dec. 31, 2018

Property, Plant and Equipment [Abstract]

Property and Equipment

Property and Equipment

The following table outlines the Company’s property and equipment:

	December 31,
(In millions)	2018			2017
Property and equipment
Land	$	356		$	410
Buildings and leasehold improvements	555			558
Vehicles, tractors, trailers and tankers	1,561			1,464
Machinery and equipment	809			648
Computer software and equipment	909			694
	4,190			3,774
Less: accumulated depreciation and amortization	(1,585		)	(1,110		)
Total property and equipment, net	$	2,605		$	2,664

Depreciation of property and equipment and amortization of computer software was $546 million, $488 million and $466 million for the years ended December 31, 2018, 2017 and 2016, respectively. Assets represented by capital leases, net of accumulated depreciation, were $296 million and $244 million as of December 31, 2018 and 2017, respectively, and are included primarily in vehicles, tractors, trailers and tankers. Property and equipment acquired through capital leases was $111 million, $145 million and $71 million in 2018, 2017 and 2016, respectively. The net book value of capitalized internally-developed software totaled $263 million and $206 million as of December 31, 2018 and 2017, respectively.