Basis of Presentation and Summary of Significant Accounting Policies - Components of Restricted Cash (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Restricted Cash and Cash Equivalents Items [Line Items]
Total current restricted cash	$ 39.9	$ 40.7
Securitized debt reserves
Restricted Cash and Cash Equivalents Items [Line Items]
Total current restricted cash	27.0	38.3
Applebee's advertising funds
Restricted Cash and Cash Equivalents Items [Line Items]
Total current restricted cash	12.8	2.3
Other
Restricted Cash and Cash Equivalents Items [Line Items]
Total current restricted cash	$ 0.1	$ 0.1