Consolidating Condensed Financial Information of Guarantor Subsidiaries - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 27, 2014	Mar. 08, 2010
Debt Instrument [Line Items]
Collective ownership percentage on guarantor subsidiaries	100.00%
Senior Subordinated Notes, Net of Unamortized Discount, Interest at 8.25%, Payable Semi-annually, Principal Due March 2018 [Member]
Debt Instrument [Line Items]
Obligation to pay principal on the company's senior subordinated notes	$ 450.0
Senior subordinated notes, percentage	8.25%	8.25%
Senior subordinated notes due date	Mar. 01, 2018