Franchising Operating Rights and Goodwill - Impairment (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Franchise operating rights
Impairment of franchise operating rights	$ 128.1		$ 128.1
Goodwill
Impairment of goodwill	$ 0.0		0.0
Huntsville, AL
Franchise operating rights
Impairment of franchise operating rights			60.0
Augusta, GA
Franchise operating rights
Impairment of franchise operating rights			24.4
Panama City, FL
Franchise operating rights
Impairment of franchise operating rights			13.5
Montgomery, AL
Franchise operating rights
Impairment of franchise operating rights			13.0
Newnan, GA
Franchise operating rights
Impairment of franchise operating rights			9.5
Valley, AL
Franchise operating rights
Impairment of franchise operating rights			4.0
Columbus, GA
Franchise operating rights
Impairment of franchise operating rights			$ 3.7