Summary of Stock Option Activity and Stock Appreciation Rights (Detail) (Employee Stock Option And Stock Appreciation Rights, USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Oct. 02, 2011	Oct. 03, 2010	Sep. 27, 2009
Employee Stock Option And Stock Appreciation Rights
Stock Options
Outstanding Beginning Balance	9,474,000	9,226,000	10,663,000
Assumed from acquisition		3,120,000	28,000
Exercised	(1,933,000)	(2,155,000)	(464,000)
Forfeited	(567,000)	(729,000)	(1,001,000)
Granted		12,000
Outstanding Ending Balance	6,974,000	9,474,000	9,226,000	10,663,000
Exercisable stock options	6,754,000
Exercisable and expected to vest stock options	6,973,000
Weighted average Exercise Price
Outstanding Beginning Balance	$ 19.84	$ 20.65	$ 20.48
Assumed from acquisition		$ 13.56	$ 13.87
Exercised	$ 16.82	$ 13.90	$ 10.35
Granted		23.69
Forfeited	$ 24.99	$ 20.88	$ 23.43
Outstanding Ending Balance	$ 20.26	$ 19.84	$ 20.65	$ 20.48
Intrinsic Value
Outstanding, Intrinsic Value	$ 21,557	$ 12,684	$ 13,156	$ 11,356
Exercised, Intrinsic Value	7,619	18,558	2,683
Exercisable stock options, Intrinsic Value	19,968
Exercisable and expected to vest stock options, Intrinsic Value	$ 21,558
Weighted Average Remaining Life
Outstanding, Weighted Average Remaining Life	2 years 6 months	3 years 1 month 6 days	3 years 4 months 24 days	4 years 3 months 18 days
Exercisable stock options, Weighted Average Exercise Price	$ 20.50
Exercisable stock options, Weighted Average Remaining Life	2 years 4 months 24 days
Exercisable and expected to vest stock options, Weighted Average Exercise Price	$ 20.26
Exercisable and expected to vest stock options, Weighted Average Remaining Life	2 years 6 months