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Intangible Assets, net (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Dec. 31, 2011
Intangible assets subject to amortization:      
Intangible assets subject to amortization, Gross Carrying Amount $ 534.3   $ 530.9
Intangible assets subject to amortization, Accumulated Amortization (156.0)   (145.6)
Intangible assets      
Intangible assets, Gross Carrying Amount 1,046.9   1,041.5
Changes in intangible assets due to foreign currency translation gain 2.9    
Amortization expense for intangible assets 10.2 7.9  
Summary of estimated aggregate amortization expense for each of the next five years      
2012 30.6    
2013 40.7    
2014 38.7    
2015 37.1    
2016 35.4    
2017 30.0    
McKey Perforated Products Co., Inc.,
     
Intangible assets      
Intangible assets acquired, excluding goodwill 2.3    
Covenants not to compete
     
Intangible assets subject to amortization:      
Intangible assets subject to amortization, Gross Carrying Amount 7.6   7.3
Intangible assets subject to amortization, Accumulated Amortization (7.0)   (6.9)
Loan fees
     
Intangible assets subject to amortization:      
Intangible assets subject to amortization, Gross Carrying Amount 31.2   31.2
Intangible assets subject to amortization, Accumulated Amortization (18.3)   (17.6)
Customer lists/relationships
     
Intangible assets subject to amortization:      
Intangible assets subject to amortization, Gross Carrying Amount 480.7   477.7
Intangible assets subject to amortization, Accumulated Amortization (123.6)   (114.2)
Software - internal use
     
Intangible assets subject to amortization:      
Intangible assets subject to amortization, Gross Carrying Amount 8.1   8.1
Intangible assets subject to amortization, Accumulated Amortization (4.9)   (4.7)
Other
     
Intangible assets subject to amortization:      
Intangible assets subject to amortization, Gross Carrying Amount 6.7   6.6
Intangible assets subject to amortization, Accumulated Amortization (2.2)   (2.2)
Trade names
     
Intangible assets not subject to amortization:      
Intangible assets not subject to amortization, Gross Carrying Amount $ 512.6   $ 510.6