v2.4.0.6
Supplemental Cash Flow Information - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Dec. 28, 2012
Dec. 30, 2011
Fair Value, Instruments Classified in Shareholders' Equity Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Unpaid amounts related to purchase of assets $ 1.5 $ 3.1