Cash, Cash Equivalents and Restricted Cash - Schedule of Current Restricted Cash (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Restricted Cash and Cash Equivalents Items [Line Items]
Total current restricted cash	$ 72.1	$ 39.9
Securitized debt reserves
Restricted Cash and Cash Equivalents Items [Line Items]
Total current restricted cash	33.7	27.0
Applebee's advertising funds | Applebee's
Restricted Cash and Cash Equivalents Items [Line Items]
Total current restricted cash	38.3	12.8
Other
Restricted Cash and Cash Equivalents Items [Line Items]
Total current restricted cash	$ 0.1	$ 0.1