Valuation and Qualifying Accounts (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 30, 2012	Dec. 25, 2011	Dec. 26, 2010
Price Protection
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning balance	$ 10.0	$ 9.4	$ 17.3
Charged to costs and expenses, or revenues	39.1	37.6	32.3
Deductions	(40.4)	(37.0)	(40.2)
Ending balance	8.7	10.0	9.4
Product Returns
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning balance	11.2	11.9	11.3
Charged to costs and expenses, or revenues	19.2	20.9	23.4
Deductions	(21.6)	(21.7)	(22.9)
Charged to other accounts	(1.4)	0.1	0.1
Ending balance	7.4	11.2	11.9
Other Returns And Allowances
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning balance	2.8	5.6	4.2
Charged to costs and expenses, or revenues	13.9	14.3	11.4
Deductions	(13.1)	(17.1)	(10.0)
Charged to other accounts	1.4
Ending balance	5.0	2.8	5.6
Deferred Tax Valuation Allowance
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning balance	171.1	205.7	209.1
Charged to costs and expenses, or revenues			3.9
Deductions	(9.8)	(36.8)	(8.0)
Charged to other accounts	(6.8)	2.2	0.7
Ending balance	$ 154.5	$ 171.1	$ 205.7