Goodwill - Narrative (Details)	12 Months Ended
Dec. 31, 2020 USD ($)
Goodwill [Line Items]
Goodwill, impairment loss	$ 92,200,000
Franchised \| Applebee's
Goodwill [Line Items]
Goodwill, impairment loss	92,200,000
Entity Operated Units \| Applebee's
Goodwill [Line Items]
Goodwill, impairment loss	$ 0

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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