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Property, Plant & Equipment
3 Months Ended
Mar. 31, 2019
Property, Plant and Equipment [Abstract]  
Property, Plant & Equipment
PROPERTY, PLANT & EQUIPMENT
The following table summarizes our property, plant and equipment at March 31, 2019 and December 31, 2018:
Millions of dollars

March 31, 2019

December 31, 2018
Land

$
101


$
102

Buildings

1,603


1,593

Machinery and equipment

7,917


7,909

Accumulated depreciation

(6,263
)

(6,190
)
Property, plant and equipment, net

$
3,358


$
3,414


During the three months ended March 31, 2019, we disposed of buildings, machinery and equipment no longer in use with a net book value of $3 million and the loss on the disposal was not material.