Receivables - Components of Finance and Contract Receivables Beyond One Year (Detail) - USD ($) $ in Millions	Mar. 28, 2020	Dec. 29, 2019	Dec. 28, 2019
Financing Receivable, Allowance for Credit Loss [Line Items]
Long-term finance and contract receivables	$ 1,511.5		$ 1,509.9
Allowance for credit loss, noncurrent	54.2		46.3
Total long-term finance and contract receivables – net	1,457.3		1,463.6
Finance Receivables
Financing Receivable, Allowance for Credit Loss [Line Items]
Long-term finance and contract receivables	1,149.4		1,145.7
Allowance for credit loss, noncurrent	47.5	$ 45.7	42.2
Total long-term finance and contract receivables – net	1,101.9		1,103.5
Finance Receivables | Finance and Contract Installment Receivables
Financing Receivable, Allowance for Credit Loss [Line Items]
Long-term finance and contract receivables	1,112.1		1,106.0
Allowance for credit loss, noncurrent	46.9		41.6
Finance Receivables | Finance and Contract Lease Receivables
Financing Receivable, Allowance for Credit Loss [Line Items]
Long-term finance and contract receivables	37.3		39.7
Unearned finance charges, noncurrent	8.0		8.2
Allowance for credit loss, noncurrent	0.6		0.6
Contract Receivables
Financing Receivable, Allowance for Credit Loss [Line Items]
Long-term finance and contract receivables	362.1		364.2
Allowance for credit loss, noncurrent	6.7	$ 6.5	4.1
Total long-term finance and contract receivables – net	355.4		360.1
Contract Receivables | Finance and Contract Installment Receivables
Financing Receivable, Allowance for Credit Loss [Line Items]
Long-term finance and contract receivables	192.8		195.5
Allowance for credit loss, noncurrent	3.1		1.8
Contract Receivables | Finance and Contract Lease Receivables
Financing Receivable, Allowance for Credit Loss [Line Items]
Long-term finance and contract receivables	169.3		168.7
Unearned finance charges, noncurrent	29.2		29.4
Allowance for credit loss, noncurrent	$ 3.6		$ 2.3