Quarterly report pursuant to Section 13 or 15(d)

PROPERTY, PLANT AND EQUIPMENT

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PROPERTY, PLANT AND EQUIPMENT
 9 Months Ended
Sep. 30, 2018
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT PROPERTY, PLANT AND EQUIPMENT
Property, plant and equipment as of September 30, 2018 and December 31, 2017 consists of the following (in millions):
 
2018
 
2017
Vehicles
$
9,500

 
$
9,365

Aircraft
17,245

 
16,248

Land
1,783

 
1,582

Buildings
4,615

 
4,035

Building and leasehold improvements
4,095

 
3,934

Plant equipment
10,054

 
9,387

Technology equipment
2,062

 
1,907

Equipment under operating leases
—

 
29

Construction-in-progress
3,692

 
2,239

 
53,046

 
48,726

Less: Accumulated depreciation and amortization
(27,667
)
 
(26,608
)
 
$
25,379

 
$
22,118


 
We continually monitor our aircraft fleet utilization in light of current and projected volume levels, aircraft fuel prices and other factors. Additionally, we monitor all 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 or nine months ended September 30, 2018 or 2017.