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SEGMENT INFORMATION (Tables)
 6 Months Ended
Jun. 30, 2012
Segment Reporting [Abstract]  
Segment Information
 
Three Months Ended
June 30,
 
Six Months Ended
June 30,
 
2012
 
2011
 
2012
 
2011
Sales:
($ in millions)
Chlor Alkali Products
$
363.2

 
$
380.3

 
$
722.9

 
$
679.7

Winchester
145.5

 
148.8

 
293.0

 
285.4

Total sales
$
508.7

 
$
529.1

 
$
1,015.9

 
$
965.1

Income before taxes:
 
 
 
 
 
 
 
Chlor Alkali Products
$
75.0

 
$
72.8

 
$
149.4

 
$
118.0

Winchester
11.9

 
11.8

 
22.7

 
24.3

Corporate/other:
 
 
 
 
 
 
 
Pension income
7.0

 
7.2

 
13.3

 
13.9

Environmental (expense) income
(0.3
)
 
1.1

 
(3.1
)
 
(0.4
)
Other corporate and unallocated costs
(20.8
)
 
(19.3
)
 
(38.7
)
 
(37.9
)
Restructuring charges
(1.8
)
 
(2.4
)
 
(3.7
)
 
(2.5
)
Other operating (expense) income
(0.1
)
 
0.2

 
0.4

 
1.6

Interest expense
(5.8
)
 
(7.4
)
 
(12.3
)
 
(14.6
)
Interest income
0.3

 
0.3

 
0.5

 
0.5

Other (expense) income
(2.1
)
 
(0.6
)
 
(4.7
)
 
180.6

Income before taxes
$
63.3

 
$
63.7

 
$
123.8

 
$
283.5