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Description of the Business and Summary of Significant Accounting Policies (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2013
Sep. 30, 2013
Sep. 30, 2014
Payment Guarantee
Dec. 31, 2013
Payment Guarantee
Organization, Consolidation and Presentation of Financial Statements [Abstract]        
Prior period reclassification $ 1.4 $ 4.7    
Guarantor Obligations [Line Items]        
License agreements, guaranteed obligations, term     6 years 4 years
Minimum guarantees     178.3 216.0
Minimum guarantees, due in next twelve months     10.6  
Minimum guarantees, payments year to date     27.4  
Minimum guarantees, due in second year     29.2  
Minimum guarantees, due in third year     28.9  
Minimum guarantees, due in fourth year     28.7  
Minimum guarantees, due in fifth year     $ 80.9