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Property, Plant & Equipment
3 Months Ended
Mar. 31, 2016
Property, Plant and Equipment [Abstract]  
Property, Plant & Equipment
PROPERTY, PLANT & EQUIPMENT
The following table summarizes our property, plant and equipment as of March 31, 2016 and December 31, 2015:
Millions of dollars
 
March 31,
2016
 
December 31,
2015
Land
 
$
135

 
$
131

Buildings
 
1,660

 
1,614

Machinery and equipment
 
8,187

 
7,982

Accumulated depreciation
 
(6,182
)
 
(5,953
)
Property, plant and equipment, net
 
$
3,800

 
$
3,774


During the three months ended March 31, 2016, we disposed of $56 million of machinery and equipment.