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Current Expected Credit Losses - Components of Receivables (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 84.8	$ 85.7
Gift card receivables	5.4	22.5
Notes receivable	20.4	18.6
Financing receivables:	81.3
Accounts and financing receivable, before allowance for credit loss	177.3	199.5
Less: allowance for credit losses	(18.3)	(23.1)
Accounts and financing receivable, after allowance for credit loss	159.0	176.4
Less: current portion	(107.4)	(121.9)
Long-term receivables	51.6	54.5
Equipment leases receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables:	40.8	43.9
Direct financing leases receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables:	20.1	22.7
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:	$ 5.7	$ 6.0

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