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Property, Plant and Equipment, net
12 Months Ended
Dec. 31, 2018
Property Plant And Equipment [Abstract]  
Property, Plant and Equipment, net

5. Property, Plant and Equipment, net

Property, plant and equipment consist of (in millions):

 

 

 

Estimated

 

December 31,

 

 

 

Useful Lives

 

2018

 

 

2017

 

Information technology assets

 

1-7 Years

 

$

45

 

 

$

48

 

Operating equipment

 

2-15 Years

 

 

92

 

 

 

93

 

Buildings and land (1)

 

5-35 Years

 

 

99

 

 

 

97

 

Total property, plant and equipment

 

 

 

 

236

 

 

 

238

 

Less: accumulated depreciation

 

 

 

 

(130

)

 

 

(119

)

Property, plant and equipment, net

 

 

 

$

106

 

 

$

119

 

 

 

(1)

Land has an indefinite life.

Depreciation expense was $21 million, $28 million and $32 million for the years ended December 31, 2018, 2017 and 2016, respectively.  For the year ended December 31, 2017, the Company completed the sale of certain assets in the U.S. segment and recognized a gain of $10 million in warehousing, selling and administrative in the consolidated statement of operations.