Property, Plant, and Equipment

12 Months Ended

Dec. 31, 2018

Property, Plant and Equipment [Abstract]

PROPERTY, PLANT, AND EQUIPMENT

6. PROPERTY, PLANT, AND EQUIPMENT

Major classes of property, plant, and equipment, including assets held under capital leases, consisted of the following (in millions):

	December 31,
	2018			2017
Land	$	416		$	411
Crude oil processing facilities	30,721			30,109
Transportation and terminaling facilities	4,935			4,335
Grain processing equipment	1,212			903
Administrative buildings	953			910
Other	2,276			2,068
Construction in progress	1,960			1,274
Property, plant, and equipment, at cost	42,473			40,010
Accumulated depreciation	(13,625		)	(12,530		)
Property, plant, and equipment, net	$	28,848		$	27,480

Our assets under capital leases are presented in the table above within “Other” and consist of various types of assets that primarily support our refining operations and totaled $711 million and $635 million as of December 31, 2018 and 2017, respectively. Accumulated amortization on assets under capital leases was $106 million and $72 million as of December 31, 2018 and 2017, respectively.

Depreciation expense for the years ended December 31, 2018, 2017, and 2016 was $1.4 billion, $1.3 billion, and $1.3 billion, respectively.