Receivables - Components of Current Finance and Contract Receivables (Detail) - USD ($) $ in Millions	Dec. 28, 2019	Dec. 29, 2018
Financing Receivable, Allowance for Credit Loss [Line Items]
Finance and Contract receivable, before allowance for credit losses, current	$ 652.0	$ 637.6
Allowances for doubtful accounts:
Allowances for doubtful accounts, finance receivables	(21.2)	(20.8)
Total current finance and contract receivables – net	630.8	616.8
Finance Receivables
Financing Receivable, Allowance for Credit Loss [Line Items]
Finance and Contract receivable, before allowance for credit losses, current	549.8	538.1
Allowances for doubtful accounts:
Allowances for doubtful accounts, finance receivables	(19.7)	(19.6)
Total current finance and contract receivables – net	530.1	518.5
Finance Receivables | Installment Receivables
Financing Receivable, Allowance for Credit Loss [Line Items]
Finance and Contract receivable, before allowance for credit losses, current	511.9	499.0
Allowances for doubtful accounts:
Allowances for doubtful accounts, finance receivables	(19.2)	(19.0)
Finance Receivables | Finance and Contract Leases
Financing Receivable, Allowance for Credit Loss [Line Items]
Finance and Contract receivable, before allowance for credit losses, current	37.9	39.1
Unearned finance charges, current	11.7	11.4
Allowances for doubtful accounts:
Allowances for doubtful accounts, finance receivables	(0.5)	(0.6)
Contract Receivables
Financing Receivable, Allowance for Credit Loss [Line Items]
Finance and Contract receivable, before allowance for credit losses, current	102.2	99.5
Allowances for doubtful accounts:
Allowances for doubtful accounts, finance receivables	(1.5)	(1.2)
Total current finance and contract receivables – net	100.7	98.3
Contract Receivables | Installment Receivables
Financing Receivable, Allowance for Credit Loss [Line Items]
Finance and Contract receivable, before allowance for credit losses, current	50.8	48.9
Allowances for doubtful accounts:
Allowances for doubtful accounts, finance receivables	(0.5)	(0.4)
Contract Receivables | Finance and Contract Leases
Financing Receivable, Allowance for Credit Loss [Line Items]
Finance and Contract receivable, before allowance for credit losses, current	51.4	50.6
Unearned finance charges, current	18.2	18.4
Allowances for doubtful accounts:
Allowances for doubtful accounts, finance receivables	$ (1.0)	$ (0.8)