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Property, Plant and Equipment (Tables)
9 Months Ended
Sep. 30, 2012
Property, Plant and Equipment [Abstract]  
Schedule of property, plant and equipment
Property, plant and equipment consisted of the following:
(in Millions)
September 30, 2012
 
December 31, 2011
Property, plant and equipment
$
2,942.9

 
$
2,850.0

Accumulated depreciation
1,871.6

 
1,863.2

Property, plant and equipment, net
$
1,071.3

 
$
986.8