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Goodwill and Other Intangible Assets (Details) - USD ($)
$ in Millions
Jun. 30, 2015
Dec. 31, 2014
Indefinite-lived Intangible Assets by Major Class [Line Items]    
Goodwill $ 1,083.6 $ 1,075.2
Accumulated impairment loss 513.4 513.4
Finite-Lived [Abstract]    
Finite-Lived Intangible Assets, Gross 374.2 411.7
Finite-Lived Intangible Assets, Accumulated Amortization 250.2 276.2
Finite-Lived Intangible Assets, Net 124.0 135.5
Indefinite-Lived [Abstract]    
Indefinite-Lived Intangible Assets (Excluding Goodwill) 151.0 151.3
Intangible Assets (Excluding Goodwill) [Abstract]    
Intangible Assets, Gross (Excluding Goodwill), Total 525.2 563.0
Intangible Assets, Accumulated Amortization (Excluding Goodwill), Total 250.2 276.2
Intangible Assets, Net (Excluding Goodwill), Total 275.0 286.8
Intangible Assets, Future Amortization Expense by Fiscal Year [Abstract]    
Estimated amortization expense, remainder of the current fiscal year 15.4  
Estimated amortization expense, 2016 26.8  
Estimated amortization expense, 2017 23.6  
Estimated amortization expense, 2018 20.9  
Estimated amortization expense, 2019 16.7  
Estimated amortization expense, 2020 13.4  
Tradenames [Member]    
Indefinite-Lived [Abstract]    
Indefinite-Lived Intangible Assets (Excluding Goodwill) 54.0 54.0
Accumulated Impairment Loss 139.5 139.5
Reacquired Franchise Rights [Member]    
Indefinite-Lived [Abstract]    
Indefinite-Lived Intangible Assets (Excluding Goodwill) 97.0 97.3
Technology [Member]    
Finite-Lived [Abstract]    
Finite-Lived Intangible Assets, Gross 0.0 19.6
Finite-Lived Intangible Assets, Accumulated Amortization 0.0 19.6
Finite-Lived Intangible Assets, Net 0.0 0.0
Franchise Agreements [Member]    
Finite-Lived [Abstract]    
Finite-Lived Intangible Assets, Gross 0.0 18.0
Finite-Lived Intangible Assets, Accumulated Amortization 0.0 18.0
Finite-Lived Intangible Assets, Net 0.0 0.0
Customer Relationships [Member]    
Finite-Lived [Abstract]    
Finite-Lived Intangible Assets, Gross 364.3 359.9
Finite-Lived Intangible Assets, Accumulated Amortization 241.1 225.6
Finite-Lived Intangible Assets, Net 123.2 134.3
Other [Member]    
Finite-Lived [Abstract]    
Finite-Lived Intangible Assets, Gross 9.9 14.2
Finite-Lived Intangible Assets, Accumulated Amortization 9.1 13.0
Finite-Lived Intangible Assets, Net $ 0.8 $ 1.2