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Property, Plant, and Equipment (Tables)
6 Months Ended
Jun. 30, 2021
Property Plant And Equipment [Abstract]  
Components of Property, Plant, and Equipment

The components of property, plant, and equipment were as follows (dollars in millions):

 

 

 

June 30,

 

 

December 31,

 

 

 

2021

 

 

2020

 

Land and land improvements

 

$

186.6

 

 

$

179.6

 

Buildings

 

 

896.8

 

 

 

858.5

 

Machinery and equipment

 

 

6,027.9

 

 

 

5,826.6

 

Construction in progress

 

 

269.5

 

 

 

360.0

 

Other

 

 

92.6

 

 

 

88.8

 

Property, plant and equipment, at cost

 

 

7,473.4

 

 

 

7,313.5

 

Less accumulated depreciation

 

 

(4,232.9

)

 

 

(4,120.1

)

Property, plant, and equipment, net

 

$

3,240.5

 

 

$

3,193.4