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Franchising Operating Rights and Goodwill - Impairment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Franchise operating rights
Impairment of franchise operating rights	$ 131.7		$ 259.8
Goodwill
Impairment of goodwill	0.0		0.0
Columbus, GA
Franchise operating rights
Impairment of franchise operating rights	35.4		39.1
Huntsville, AL
Franchise operating rights
Impairment of franchise operating rights	21.5		81.5
Augusta, GA
Franchise operating rights
Impairment of franchise operating rights	20.5		44.9
Montgomery, AL
Franchise operating rights
Impairment of franchise operating rights	20.0		33.0
Charleston, SC
Franchise operating rights
Impairment of franchise operating rights	12.5		12.5
Panama City, FL
Franchise operating rights
Impairment of franchise operating rights	9.5		23.0
Valley, AL
Franchise operating rights
Impairment of franchise operating rights	6.5		10.5
Knoxville, TN
Franchise operating rights
Impairment of franchise operating rights	$ 5.8		5.8
Newnan, GA
Franchise operating rights
Impairment of franchise operating rights			$ 9.5