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Accounts Receivable Securitization (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2013
Maximum
Sep. 26, 2012
Maximum
Accounts Receivable Securitization        
Capacity of securitization program     $ 150 $ 125
Extended term securitization program 3 years      
Index rate LIBOR      
Fixed spread 1.45%      
Period for which the entity will be able to comply with the financial covenants pertaining to the Receivable Purchase Agreement (in months) 12 months      
Average collection cycle for accounts receivable (in days)     60 days  
Fair value of deferred purchase price notes 41.3 34.3    
Trade accounts receivable balance sold $ 148.9 $ 149.2