Deferred Tax Assets Liabilities (Detail) (USD $) In Millions, unless otherwise specified	Dec. 28, 2012	Dec. 30, 2011
Components Of Deferred Income Tax Assets And Liabilities [Line Items]
Net operating loss and tax credit carryforwards	$ 229.6	$ 179.5
Amortizable intangibles	41.8	34.8
Inventory reserves	29.8	30.6
Deferred employee benefit expenses	17.2	22.8
Accrued liabilities	15.3	14.7
Deferred compensation plan	6.1	13.7
Restructuring accruals	5.7	5.7
Deferred revenue and advance payments	5.2	4.8
Fixed assets and depreciation	4.6
Other	13.1	11.3
Deferred tax assets	368.4	317.9
Unrealized gain on marketable securities	(184.8)	(196.0)
Unremitted earnings of non-U.S. subsidiaries	(48.0)
Fixed assets and depreciation		(0.5)
Other	(6.7)	(5.1)
Deferred tax liabilities	(239.5)	(201.6)
Valuation allowance	(134.3)	(113.8)
Net deferred tax (liabilities) assets	$ (5.4)	$ 2.5