Closure and Impairment Charges - Narrative (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($) restaurant	Sep. 30, 2021 USD ($) restaurant	Sep. 30, 2022 USD ($) restaurant	Sep. 30, 2021 USD ($) restaurant
Goodwill [Line Items]
Long-lived tangible asset impairment | $	$ 1.1	$ 0.0	$ 1.4	$ 1.7
IHOP
Goodwill [Line Items]
Number of restaurants related to prior period closure charge revisions	30	50	35	25
IHOP | Entity Operated Units
Goodwill [Line Items]
Number of restaurants subject to asset impairment			2
IHOP | Franchised Units
Goodwill [Line Items]
Number of restaurants subject to asset impairment				4
Applebee's | Entity Operated Units
Goodwill [Line Items]
Long-lived tangible asset impairment | $			$ 1.1