Property and Equipment

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment [Abstract]

Property and Equipment

Property and Equipment

	December 31,
(In millions)	2019			2018
Property and equipment
Land	$	334		$	356
Buildings and leasehold improvements	648			555
Vehicles, tractors, trailers and tankers	1,726			1,561
Machinery and equipment	949			809
Computer software and equipment	1,101			909
	4,758			4,190
Less: accumulated depreciation and amortization	(2,054		)	(1,585		)
Total property and equipment, net	$	2,704		$	2,605
Net book value of capitalized internally-developed software included in property and equipment, net	$	333		$	263

Depreciation of property and equipment and amortization of computer software was $577 million, $546 million and $488 million for the years ended December 31, 2019, 2018 and 2017, respectively.