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Property, Plant And Equipment
12 Months Ended
Dec. 31, 2014
Property, Plant and Equipment [Abstract]  
Property, Plant And Equipment
PROPERTY, PLANT AND EQUIPMENT
The classes of property, plant and equipment as of December 31 are summarized as follows ($ in millions):
 
 
2014
 
2013
Land and improvements
$
186.5

 
$
189.7

Buildings
1,042.5

 
1,010.1

Machinery and equipment
2,332.3

 
2,279.0

Customer-leased instruments
1,235.8

 
1,032.0

Gross property, plant and equipment
4,797.1

 
4,510.8

Less accumulated depreciation
(2,594.1
)
 
(2,299.5
)
Property, plant and equipment, net
$
2,203.0

 
$
2,211.3