Estimated Future Amortization Expense (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Apr. 01, 2012
Remainder of Year
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 94,391
More than One and within Two Years from Balance Sheet Date
Finite-Lived Intangible Assets [Line Items]
Amortization expense	82,537
More than Two and within Three Years from Balance Sheet Date
Finite-Lived Intangible Assets [Line Items]
Amortization expense	75,680
More than Three and within Four Years from Balance Sheet Date
Finite-Lived Intangible Assets [Line Items]
Amortization expense	71,199
More than Four Years from Balance Sheet Date and Thereafter
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 129,606