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Restructuring Activities (Details Textual) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2011
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Restructuring Cost and Reserve [Line Items]        
Restructuring and other charges $ 1.0 $ 52.8 $ 7.6 $ 7.0
Restructuring Activities (Textual) [Abstract]        
Recognized Non Recurring Cost 4      
Integration and optimization program [Member]
        
Restructuring Cost and Reserve [Line Items]        
Restructuring and other charges 52.8      
Restructuring Expected Accrual to Pay 20 20    
Restructuring Expected Accrual Remaining to Pay 4.2 4.2    
Integration and optimization program [Member] | Stock Appreciation Rights (SARs) [Member]
        
Restructuring Cost and Reserve [Line Items]        
Restructuring and other charges   38.0    
Integration and optimization program [Member] | Maximum [Member]
        
Restructuring Cost and Reserve [Line Items]        
Expected Associated Cost and Restructuring Charges Related to Plan   185    
Integration and optimization program [Member] | Minimum [Member]
        
Restructuring Cost and Reserve [Line Items]        
Expected Associated Cost and Restructuring Charges Related to Plan   $ 165