Stock-Based Compensation - Summary of Grants of Common Stock to Outside Directors (Detail) - Common Stock Awards [Member] - Outside Directors [Member] - Immediate Vesting [Member] - $ / shares		12 Months Ended
		Oct. 02, 2017	Oct. 03, 2016	Oct. 01, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock Awarded		4,800	4,800	3,000
Price Per Share	[1]	$ 33.20	$ 29.80	$ 31.77

[1] Price per share represents closing price of our common stock on the date of grant.