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Basis of Financial Statements - Goodwill (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Mar. 31, 2026	Dec. 31, 2025
Goodwill [Line Items]
Goodwill	$ 21.3	$ 53.4	$ 21.3	$ 53.4		$ 53.4
Goodwill impairment	32.1	$ 0.0	32.1	$ 0.0
99 Restaurants
Goodwill [Line Items]
Goodwill	21.3		21.3		$ 53.4
Goodwill impairment	32.1
99 Restaurants | Estimate of Fair Value Measurement
Goodwill [Line Items]
Goodwill	38.0		38.0
99 Restaurants | Carrying Value
Goodwill [Line Items]
Goodwill	$ 70.1		$ 70.1

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