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Goodwill and Other Intangible Assets - Goodwill and Intangible Assets (Details) - USD ($) $ in Millions | Sep. 30, 2015 | Dec. 31, 2014
--- | --- | ---
Indefinite-lived Intangible Assets by Major Class [Line Items] |  |
Goodwill | $ 1,243.4 | $ 1,075.2
Accumulated impairment loss | 513.4 | 513.4
Finite-lived: |  |
Gross | 438.9 | 411.7
Accumulated Amortization | 258.0 | 276.2
Net | 180.9 | 135.5
Indefinite-lived: |  |
Indefinite-lived intangible assets (excluding goodwill) | 150.8 | 151.3
Total intangible assets |  |
Gross | 589.7 | 563.0
Accumulated Amortization | 258.0 | 276.2
Net | 331.7 | 286.8
Intangible Assets, Future Amortization Expense by Fiscal Year [Abstract] |  |
Estimated amortization expense, remainder of 2015 | 9.7 |
Estimated amortization expense, 2016 | 34.9 |
Estimated amortization expense, 2017 | 31.8 |
Estimated amortization expense, 2018 | 28.7 |
Estimated amortization expense, 2019 | 24.1 |
Estimated amortization expense, 2020 | 19.6 |
Tradenames |  |
Indefinite-lived: |  |
Indefinite-lived intangible assets (excluding goodwill) | 54.0 | 54.0
Accumulated impairment loss | 139.5 | 139.5
Reacquired franchise rights |  |
Indefinite-lived: |  |
Indefinite-lived intangible assets (excluding goodwill) | 96.8 | 97.3
Technology |  |
Finite-lived: |  |
Gross | 0.0 | 19.6
Accumulated Amortization | 0.0 | 19.6
Net | 0.0 | 0.0
Franchise agreements |  |
Finite-lived: |  |
Gross | 0.0 | 18.0
Accumulated Amortization | 0.0 | 18.0
Net | 0.0 | 0.0
Customer relationships |  |
Finite-lived: |  |
Gross | 420.8 | 359.9
Accumulated Amortization | 248.6 | 225.6
Net | 172.2 | 134.3
Other |  |
Finite-lived: |  |
Gross | 18.1 | 14.2
Accumulated Amortization | 9.4 | 13.0
Net | $ 8.7 | $ 1.2

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