Current Expected Credit Losses - Components of Receivables (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 103.7	$ 60.8
Gift card receivables	5.8	46.7
Notes receivable	29.2	28.9
Financing receivables:	105.6
Accounts and financing receivable, before allowance for credit loss	218.3	234.2
Less: allowance for doubtful accounts and notes receivable	(19.7)	(11.3)
Accounts and financing receivable, after allowance for credit loss	198.6	222.9
Less: current portion	(124.6)	(136.9)
Long-term receivables	74.0	86.0
Equipment leases receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables:	50.0	56.3
Direct financing leases receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables:	26.3	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:	$ 3.2	$ 7.3