Closure and Impairment Charges - Narrative (Details) $ in Millions	3 Months Ended
Mar. 31, 2022 USD ($) restaurant	Mar. 31, 2021 USD ($) restaurant
Goodwill [Line Items]
Closure charges	$ 0.1	$ 1.9
Long-lived tangible asset impairment	$ 0.0	$ 0.1
IHOP
Goodwill [Line Items]
Number of restaurants related to prior period closure charge revisions \| restaurant	28	35

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