Consolidating Condensed Financial Information of Guarantor Subsidiaries - Additional Information (Detail) (Guarantor Subsidiaries [Member])	3 Months Ended
Dec. 27, 2014
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Collective ownership percentage on guarantor subsidiaries	100.00%

Percentage of subsidiary's or equity method investee's stock owned by parent immediately after all stock transactions.

No definition available.

Name:	us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration