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Net Property, Plant and Equipment
12 Months Ended
Dec. 31, 2018
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment, Net PROPERTY, PLANT AND EQUIPMENT, NET
 
 
 
 
 
 
Year Ended December 31,
 
 
Useful Lives (years)
 
2018
 
2017
Land
 
 
 
 
 
$
85.7

 
$
87.6

Buildings and improvements
 
5
-
25
 
522.4

 
516.3

Machinery and equipment
 
3
-
25
 
1,333.2

 
1,244.0

Software
 
5
-
7
 
159.5

 
155.3

Other
 
3
-
20
 
45.7

 
41.7

Construction in progress
 
 
 
 
 
72.3

 
148.7

Total
 
 
 
 
 
$
2,218.8

 
$
2,193.6

Accumulated depreciation
 
 
 
 
 
(920.6
)
 
(805.0
)
Property, plant and equipment, net
 
 
 
 
 
$
1,298.2

 
$
1,388.6


Depreciation expense was $183.4 million, $176.6 million and $176.8 million for the years ended December 31, 2018, 2017 and 2016, respectively.
We capitalized interest of $4.0 million, $3.7 million and $4.3 million for the years ended December 31, 2018, 2017 and 2016, respectively.