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PROPERTY, PLANT AND EQUIPMENT (Tables)
12 Months Ended
Dec. 31, 2012
Property, Plant and Equipment [Abstract]  
Schedule of property, plant and equipment along with respective useful lives
 
 
 
December 31,
 
Useful Lives
 
2012
 
2011
 
 
 
($ in millions)
Land and improvements to land
10-20 Years
 
$
155.9

 
$
149.4

Buildings and building equipment
10-30 Years
 
204.3

 
183.9

Machinery and equipment
3-15 Years
 
1,739.5

 
1,540.3

Leasehold improvements
 
 
2.5

 
2.5

Construction in progress
 
 
96.1

 
153.3

Property, plant and equipment
 
 
2,198.3

 
2,029.4

Accumulated depreciation
 
 
(1,164.0
)
 
(1,144.0
)
Property, plant and equipment, net
 
 
$
1,034.3

 
$
885.4