Financing Receivables - Schedule of Financing Receivables (Details) - USD ($) $ in Millions	Sep. 25, 2020	Dec. 31, 2019
Financing Receivable, after Allowance for Credit Loss, Current [Abstract]
Current financing receivables, gross	$ 112.5	$ 120.3
Total allowance for credit losses	22.1	17.2
Total current financing receivables, net	90.4	103.1
Financing Receivable, after Allowance for Credit Loss, Noncurrent [Abstract]
Long-term financing receivables, gross	279.5	283.1
Total allowance for credit losses	36.0	24.1
Total long-term financing receivables, net	243.5	259.0
PSAs
Financing Receivable, after Allowance for Credit Loss, Current [Abstract]
Current financing receivables, gross	97.7	104.6
Total allowance for credit losses	15.0	10.0
Total current financing receivables, net	82.7	94.6
Financing Receivable, after Allowance for Credit Loss, Noncurrent [Abstract]
Long-term financing receivables, gross	221.3	222.9
Total allowance for credit losses	30.4	19.4
Total long-term financing receivables, net	190.9	203.5
Franchisee Notes
Financing Receivable, after Allowance for Credit Loss, Current [Abstract]
Current financing receivables, gross	14.8	15.7
Total allowance for credit losses	7.1	7.2
Total current financing receivables, net	7.7	8.5
Financing Receivable, after Allowance for Credit Loss, Noncurrent [Abstract]
Long-term financing receivables, gross	58.2	60.2
Total allowance for credit losses	5.6	4.7
Total long-term financing receivables, net	$ 52.6	$ 55.5