Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share - Narrative (Details)

v3.8.0.1
Earnings Per Share - Narrative (Details) - $ / shares
shares in Millions
6 Months Ended
Mar. 25, 2017
Mar. 31, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Number of options to purchase common stock outstanding (in shares) 3.1 2.7
Common stock outstanding, not included in computation of diluted earnings per share (in shares) 0.2  
Minimum    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Options to purchase common stock (in dollars per share) $ 6.43 $ 6.43
Maximum    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Options to purchase common stock (in dollars per share) $ 31.76 $ 36.94