Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share - Additional Information (Detail)

v3.2.0.727
Earnings Per Share - Additional Information (Detail) - Stock Options [Member] - $ / shares
shares in Millions
3 Months Ended 9 Months Ended
Jun. 27, 2015
Jun. 28, 2014
Jun. 27, 2015
Jun. 28, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Common stock outstanding, included in computation of diluted earnings per share 7.4 11.2 7.4 11.2
Common stock outstanding, not included in computation of diluted earnings per share 3.2 9.5 4.8 10.3
Minimum [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Outstanding options to purchase common stock     $ 6.43 $ 6.43
Maximum [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Outstanding options to purchase common stock     $ 15.00 $ 16.23