PROPERTY, PLANT AND EQUIPMENT

6 Months Ended

Jun. 30, 2017

Property, Plant and Equipment [Abstract]

PROPERTY, PLANT AND EQUIPMENT

PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment as of June 30, 2017 and December 31, 2016 consist of the following (in millions):

	2017			2016
Vehicles	$	8,879		$	8,638
Aircraft	15,678			15,653
Land	1,591			1,397
Buildings	3,571			3,439
Building and leasehold improvements	3,718			3,612
Plant equipment	8,714			8,430
Technology equipment	1,810			1,741
Equipment under operating leases	29			29
Construction-in-progress	1,598			735
	45,588			43,674
Less: Accumulated depreciation and amortization	(25,747		)	(24,874		)
	$	19,841		$	18,800

We continually monitor our aircraft fleet utilization in light of current and projected volume levels, aircraft fuel prices and other factors. Additionally, we monitor our other property, plant and equipment categories for any indicators that the carrying value of the assets may not be recoverable. No impairment charges on property, plant and equipment were recorded during the three and six months ended June 30, 2017 and 2016.