Changes In Outstanding Options Granted Under Equity Incentive Plans (Detail) - $ / shares	11 Months Ended	12 Months Ended
	Oct. 02, 2015	Sep. 30, 2016	Oct. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Outstanding, beginning of year, Shares Subject to Option	1,367,793	1,363,921	1,829,488
Granted, Shares Subject to Option	203,200	221,200	207,200
Exercised, Shares Subject to Options	(182,322)	(112,790)	(618,645)
Forfeited/cancelled Shares Subject to Option	(24,750)	(73,375)	(50,250)
Outstanding, end of year, Shares Subject to Option	1,363,921	1,398,956	1,367,793
Exercisable, end of year, Shares Subject to Option	826,496	922,706	752,943
Outstanding, beginning of year, Weighted Average Exercise Price	$ 60.23	$ 68.23	$ 51.08
Granted, Weighted Average Exercise Price	107.34	90.16	97.61
Exercised, Weighted Average Exercise Price	50.94	48.61	45.16
Forfeited/cancelled Weighted Average Exercise Price	74.73	89.91	66.65
Outstanding, end of year, Weighted Average Exercise Price	68.23	72.14	60.23
Exercisable, end of year, Weighted Average Exercise Price	$ 55.63	$ 61.09	$ 50.36