Other Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross	$ 218.2	$ 211.7
Accumulated Amortization	(151.4)	(144.5)
Net	66.8	67.2
Franchising Rights
Finite-Lived Intangible Assets [Line Items]
Gross	214.8	200.0
Accumulated Amortization	(151.0)	(141.0)
Net	63.8	59.0	$ 69.0	$ 79.0
Reacquired Franchise Rights
Finite-Lived Intangible Assets [Line Items]
Gross	0.0	8.3
Accumulated Amortization	0.0	(3.2)
Net	0.0	5.1	5.7	9.8
Favorable leaseholds
Finite-Lived Intangible Assets [Line Items]
Gross	3.4	3.4
Accumulated Amortization	(0.4)	(0.3)
Net	$ 3.0	$ 3.1	$ 3.2	$ 4.1