Financing Receivables - Schedule of Financing Receivables (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, after Allowance for Credit Loss, Current [Abstract]
Current financing receivables, gross	$ 114.4	$ 120.3
Total allowance for credit losses	22.4	17.2
Total current financing receivables, net	92.0	103.1
Financing Receivable, after Allowance for Credit Loss, Noncurrent [Abstract]
Long-term financing receivables, gross	277.9	283.1
Long-term financing receivable, allowance for credit losses	44.4	24.1
Total long-term financing receivables, net	233.5	259.0
PSAs
Financing Receivable, after Allowance for Credit Loss, Current [Abstract]
Current financing receivables, gross	98.9	104.6
Total allowance for credit losses	15.8	10.0
Total current financing receivables, net	83.1	94.6
Financing Receivable, after Allowance for Credit Loss, Noncurrent [Abstract]
Long-term financing receivables, gross	219.3	222.9
Long-term financing receivable, allowance for credit losses	38.5	19.4
Total long-term financing receivables, net	180.8	203.5
Franchisee Notes
Financing Receivable, after Allowance for Credit Loss, Current [Abstract]
Current financing receivables, gross	15.5	15.7
Total allowance for credit losses	6.6	7.2
Total current financing receivables, net	8.9	8.5
Financing Receivable, after Allowance for Credit Loss, Noncurrent [Abstract]
Long-term financing receivables, gross	58.6	60.2
Long-term financing receivable, allowance for credit losses	5.9	4.7
Total long-term financing receivables, net	$ 52.7	$ 55.5