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Equity Activity (Tables)
 12 Months Ended
Dec. 31, 2012
Equity [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss)
The balances of each classification, net of tax attributes, within accumulated other comprehensive income (loss) as of the periods presented are as follows:
 
 
 
Foreign Currency Translation
 
Post-Retirement Liability Adjustment, net
 
Total Accumulated Other Comprehensive (Loss) Income
 
 
(Dollar amounts in millions)
Balance, December 31, 2009
 
$
0.7

 
$
0.8

 
$
1.5

Change during the period
 
1.6

 
(2.3
)
 
(0.7
)
Balance, December 31, 2010
 
2.3

 
(1.5
)
 
0.8

Change during the period
 
(1.6
)
 
(20.0
)
 
(21.6
)
Balance, December 31, 2011
 
0.7

 
(21.5
)
 
(20.8
)
Change during the period
 
1.4

 
(2.9
)
 
(1.5
)
Balance, December 31, 2012
 
$
2.1

 
$
(24.4
)
 
$
(22.3
)