Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Additional Information 1 (Detail)

v3.10.0.1
Stock-Based Compensation - Additional Information 1 (Detail)
$ / shares in Units, shares in Thousands
12 Months Ended
Sep. 29, 2018
USD ($)
Installment
$ / shares
shares
Sep. 30, 2017
USD ($)
$ / shares
shares
Sep. 24, 2016
USD ($)
$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Dividend during expected term (in usd per share) $ 0    
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of vesting installments | Installment 4    
Expiration period approximately 6 years    
Expected life of option award     3 years 8 months
Stock price volatility (percent) 31.60% 31.50% 30.80%
Risk free interest rates (percent) 2.40% 2.00% 1.30%
Weighted average grant date fair value of options granted (in usd per share) | $ / shares $ 9.80 $ 8.14 $ 3.04
Total intrinsic value of options exercised $ 16,600,000 $ 44,000,000 $ 22,600,000
Total unrecognized compensation cost $ 8,600,000    
Nonvested stock options remaining weighted average vesting period 3 years    
Stock Options | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Outstanding options to purchase common stock (in usd per share) | $ / shares $ 6.43 $ 6.43 $ 6.43
Stock Options | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Outstanding options to purchase common stock (in usd per share) | $ / shares $ 38.10 $ 33.15 $ 15.56
Restricted Stock Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total unrecognized compensation cost $ 14,000,000    
Nonvested stock options remaining weighted average vesting period 3 years    
Restricted stock awards outstanding, shares | shares 874 1,137  
Restricted Stock Awards | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share based payment award vesting conditional period of employment 4 years 4 years  
Restricted Stock Awards | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share based payment award vesting conditional period of employment 5 years 5 years