Summary of Long-term Debt Outstanding (Detail) (USD $)	Sep. 27, 2013	Sep. 28, 2012
Debt Instrument [Line Items]
Long-term debt	$ 506,300,000	$ 6,300,000
Less: current maturities of long-term debt	(56,250,000)	0
Long-term debt	450,000,000	6,250,000
Unsecured term loan, 6.70% due in one installment of $6.25 payable in fiscal year 2014
Debt Instrument [Line Items]
Unsecured term loan	6,300,000	6,300,000
Less: current maturities of long-term debt	(6,250,000)
Secured Debt
Debt Instrument [Line Items]
Secured loans	$ 500,000,000	$ 0