Schedule of Changes in Issued and Outstanding Common Shares and Treasury Stock (Detail) - shares	3 Months Ended		9 Months Ended		11 Months Ended	24 Months Ended
	Jul. 01, 2016	Jun. 26, 2015	Jul. 01, 2016	Jun. 26, 2015	Oct. 02, 2015	Jul. 01, 2016
Equity [Abstract]
Balance, beginning of year			32,378,185		32,123,717
Shares issued under share-based compensation plans			154,075		254,468
Balance, end of current period	32,532,260		32,532,260		32,378,185	32,532,260
Balance, beginning of year			(2,831,350)		(269,228)
Shares purchased	(102,267)	(581,977)	(304,577)	(1,749,709)	(2,562,122)	(3,135,927)
Balance, end of current period	(3,135,927)		(3,135,927)		(2,831,350)	(3,135,927)
Shares outstanding, end of period	29,396,333		29,396,333		29,546,835	29,396,333