Schedule II - Valuation and Qualifying Accounts (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period		$ 43.0	$ 57.4	$ 61.7
Charged to costs and expense		80.6	99.2	124.9
Charged to other accounts		0.0	0.0	0.0
Deductions		88.7	113.6	129.2
Balance at end of period		34.9	43.0	57.4
Allowance for doubtful accounts [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period		14.2	17.2	21.8
Charged to costs and expense		13.0	18.1	23.6
Charged to other accounts		0.0	0.0	0.0
Deductions	[1]	17.7	21.1	28.2
Balance at end of period		9.5	14.2	17.2
Allowance for sales returns [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period		12.6	16.3	16.3
Charged to costs and expense		53.8	52.6	64.4
Charged to other accounts		0.0	0.0	0.0
Deductions	[2]	52.8	56.3	64.4
Balance at end of period		13.6	12.6	16.3
Allowance for cash discounts [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period		4.7	5.9	6.3
Charged to costs and expense		7.7	17.9	21.0
Charged to other accounts		0.0	0.0	0.0
Deductions	[3]	8.9	19.1	21.4
Balance at end of period		3.5	4.7	5.9
Inventory valuation allowances [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period		11.5	18.0	17.3
Charged to costs and expense		6.1	10.6	15.9
Charged to other accounts		0.0	0.0	0.0
Deductions	[4]	9.3	17.1	15.2
Balance at end of period		$ 8.3	$ 11.5	$ 18.0

[1] Accounts charged off, net of recoveries.

[2] Actual customer returns.

[3] Discounts given to customers.

[4] Adjustment upon disposal of related inventories.