Schedule of Components of Deferred Tax Assets and Liabilities (Detail) (USD $)	Sep. 26, 2014	Sep. 27, 2013
Income Tax Disclosure [Abstract]
Deferred revenues	$ 26,900,000	$ 26,800,000
Deferred compensation	37,300,000	34,900,000
Product warranty	10,900,000	13,900,000
Inventory adjustments	19,700,000	18,300,000
Equity-based compensation	28,800,000	33,300,000
Environmental reserve	4,800,000	5,700,000
Accruals and reserves	14,300,000	12,100,000
Net operating loss carryforwards	79,100,000	78,600,000
Other	38,200,000	25,700,000
Total deferred tax assets, gross	260,000,000	249,300,000
Valuation allowance	(67,500,000)	(60,700,000)
Total deferred tax assets	192,500,000	188,600,000
Tax-deductible goodwill	(27,700,000)	(27,300,000)
Fixed assets	(16,300,000)	(17,700,000)
Unremitted earnings of foreign subsidiaries	(24,000,000)	(9,400,000)
Other	(29,300,000)	(21,000,000)
Total deferred tax liabilities	(97,300,000)	(75,400,000)
Net deferred tax assets	95,200,000	113,200,000
Deferred tax assets	125,962,000	122,250,000
Net long-term deferred tax assets (included in other assets)	11,500,000	10,500,000
Net current deferred tax liabilities (included in accrued expenses)	10,800,000	7,600,000
Net long-term deferred tax liabilities (included in other long-term liabilities)	$ 31,500,000	$ 12,000,000