Current Expected Credit Losses - Components of Receivables (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 99.7	$ 60.8
Gift card receivables	3.8	46.7
Notes receivable	28.9	28.9
Financing receivables:	104.2
Accounts and financing receivable, before allowance for credit loss	214.1	234.2
Less: allowance for doubtful accounts and notes receivable	(22.1)	(11.3)
Accounts and financing receivable, after allowance for credit loss	192.0	222.9
Less: current portion	(122.1)	(136.9)
Long-term receivables	69.9	86.0
Equipment leases receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables:	49.8	56.3
Direct financing leases receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables:	25.5	34.0
Franchise fee notes receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables:	0.1	0.1
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables:	$ 6.5	$ 7.3