Schedule of Deferred Income Tax Assets and Liabilities (Detail) (USD $)	Sep. 28, 2012	Sep. 30, 2011
Schedule of Deferred Income Tax Assets and Liabilities [Line Items]
Deferred revenues	$ 26,800,000	$ 36,000,000
Deferred compensation	32,700,000	30,000,000
Product warranty	13,700,000	13,200,000
Inventory adjustments	17,000,000	18,900,000
Equity-based compensation	41,800,000	39,000,000
Environmental reserve	5,900,000	6,900,000
Net operating loss carryforwards	54,200,000	49,000,000
Other	45,400,000	39,900,000
Total deferred tax assets, gross	237,500,000	232,900,000
Valuation allowance	(45,800,000)	(46,900,000)
Total deferred tax assets	191,700,000	186,000,000
Tax-deductible goodwill	(27,400,000)	(27,700,000)
Fixed assets	(22,300,000)	(27,200,000)
Other	(28,800,000)	(24,000,000)
Total deferred tax liabilities	(78,500,000)	(78,900,000)
Net deferred tax assets	113,200,000	107,100,000
Net current deferred tax assets	115,786,000	113,965,000
Net long-term deferred tax assets (included in "Other Assets")	13,800,000	10,800,000
Net current deferred tax liabilities (included in "Accrued Expenses")	(2,900,000)	(3,200,000)
Net long-term deferred tax liabilities (included in "Other long-term liabilities")	(13,500,000)	(14,400,000)
Net deferred tax assets	$ 113,200,000	$ 107,100,000