Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2016	Oct. 02, 2015
Intangible Assets By Major Class [Line Items]
Amortized Intangible Assets, Gross Carrying Amount	$ 709,488	$ 739,193
Accumulated Amortization	356,251	326,505
Trademark
Intangible Assets By Major Class [Line Items]
Indefinite-lived Intangible Assets, Gross Carrying Amount	$ 39,798	39,352
Programs
Intangible Assets By Major Class [Line Items]
Amortized Intangible Assets, Weighted Average Years Useful Life	16 years
Amortized Intangible Assets, Gross Carrying Amount	$ 607,276	635,761
Accumulated Amortization	$ 293,223	270,830
Core Technology
Intangible Assets By Major Class [Line Items]
Amortized Intangible Assets, Weighted Average Years Useful Life	12 years
Amortized Intangible Assets, Gross Carrying Amount	$ 15,926	15,926
Accumulated Amortization	$ 11,778	10,273
Patents and Other
Intangible Assets By Major Class [Line Items]
Amortized Intangible Assets, Weighted Average Years Useful Life	12 years
Amortized Intangible Assets, Gross Carrying Amount	$ 86,286	87,506
Accumulated Amortization	$ 51,250	$ 45,402