Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Jan. 17, 2016	Sep. 27, 2015
Statement of Financial Position [Abstract]
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	15,000,000	15,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	175,000,000	175,000,000
Common stock, shares issued	81,270,513	81,096,156
Treasury stock at cost, shares	46,588,687	45,314,529