Summary of Significant Accounting Policies - Schedule of Goodwill, Finite-Lived Intangible Assets and Indefinite-Lived Intangible Assets (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill [Line Items]
Goodwill	$ 1,260.1	$ 1,297.1	$ 1,343.0
Finite-lived:
Gross	481.4	463.3
Accumulated Amortization	389.4	367.7
Net	92.0	95.6
Indefinite-lived:
Gross	176.6	150.7
Total intangible assets
Gross	658.0	614.0
Accumulated Amortization	389.4	367.7
Net	268.6	246.3
Tradenames
Indefinite-lived:
Gross	52.0	52.0
Reacquired franchise rights
Indefinite-lived:
Gross	124.6	98.7
Customer relationships
Finite-lived:
Gross	460.5	444.8
Accumulated Amortization	375.7	351.7
Net	84.8	93.1
Other
Finite-lived:
Gross	20.9	18.5
Accumulated Amortization	13.7	16.0
Net	$ 7.2	$ 2.5