Receivables - Components of Current Finance and Contract Receivables (Details) - USD ($) $ in Millions	Sep. 26, 2020	Dec. 28, 2019
Financing Receivable, Allowance for Credit Loss [Line Items]
Finance and contract receivables, current	$ 671.5	$ 652.0
Allowance for credit losses, current	(26.1)	(21.2)
Total current finance and contract receivables – net	645.4	630.8
Finance Receivables
Financing Receivable, Allowance for Credit Loss [Line Items]
Finance and contract receivables, current	555.9	549.8
Allowance for credit losses, current	(23.8)	(19.7)
Total current finance and contract receivables – net	532.1	530.1
Finance Receivables | Finance and Contract Installment Receivables
Financing Receivable, Allowance for Credit Loss [Line Items]
Finance and contract receivables, current	531.5	511.9
Allowance for credit losses, current	(23.4)	(19.2)
Finance Receivables | Finance and Contract Lease Receivables
Financing Receivable, Allowance for Credit Loss [Line Items]
Unearned finance charges, current	6.0	11.7
Finance and contract receivables, current	24.4	37.9
Allowance for credit losses, current	(0.4)	(0.5)
Contract Receivables
Financing Receivable, Allowance for Credit Loss [Line Items]
Finance and contract receivables, current	115.6	102.2
Allowance for credit losses, current	(2.3)	(1.5)
Total current finance and contract receivables – net	113.3	100.7
Contract Receivables | Finance and Contract Installment Receivables
Financing Receivable, Allowance for Credit Loss [Line Items]
Finance and contract receivables, current	62.2	50.8
Allowance for credit losses, current	(1.3)	(0.5)
Contract Receivables | Finance and Contract Lease Receivables
Financing Receivable, Allowance for Credit Loss [Line Items]
Unearned finance charges, current	17.9	18.2
Finance and contract receivables, current	53.4	51.4
Allowance for credit losses, current	$ (1.0)	$ (1.0)