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Property, Plant and Equipment
 12 Months Ended
Dec. 31, 2015
Property, Plant and Equipment  
Property, Plant and Equipment

 

8.  Property, Plant and Equipment

 

 

 

December 31,

 

($ in millions)

 

2015

 

2014

 

 

 

 

 

 

 

Land

 

$
69.5

 

$
64.6

 

Buildings

 
1,023.0

 
973.4

 

Machinery and equipment

 
3,904.2

 
3,612.5

 

Construction-in-progress

 
408.2

 
382.7

 

 

 

 

 

 

 

 

 
5,404.9

 
5,033.2

 

Accumulated depreciation

 
(2,719.0

)
(2,602.5

)

 

 

 

 

 

 

 

 

$
2,685.9

 

$
2,430.7

 

 

 

 

 

 

 

 

 

 

Property, plant and equipment are stated at historical or acquired cost. Depreciation expense amounted to $247.3 million, $239.5 million, and $261.3 million for the years ended December 31, 2015, 2014 and 2013, respectively.