Leases - Lease Receivables (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Direct financing leases receivable
Operating Leased Assets [Line Items]
Total minimum rents receivable	$ 57.3	$ 74.5
Less: unearned income	(12.4)	(18.8)
Net investment in direct financing leases receivable	44.9	55.7
Less: current portion	(11.2)	(10.8)
Long-term direct financing lease receivable	33.7	44.9
Contingent rental income	14.3	14.0	$ 15.4
Net investment equipment lease
Operating Leased Assets [Line Items]
Less: current portion	(8.5)	(8.2)
Long-term direct financing lease receivable	57.3	71.1
Total minimum leases receivable	89.9	106.4
Less: unearned income	(24.1)	(27.1)
Net investment in equipment leases receivables	$ 65.8	$ 79.3