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Property, Plant and Equipment (Tables)
3 Months Ended
Mar. 31, 2013
Property, Plant and Equipment [Abstract]  
Schedule of property, plant and equipment
Property, plant and equipment consisted of the following:
(in Millions)
March 31, 2013
 
December 31, 2012
Property, plant and equipment
$
3,028.2

 
$
3,037.4

Accumulated depreciation
1,900.9

 
1,901.2

Property, plant and equipment, net
$
1,127.3

 
$
1,136.2