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Stock-Based Compensation (Tables)
6 Months Ended
Mar. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Stock-Based Compensation Expense in Consolidated Statements of Operations
The following presents stock-based compensation expense in the Company’s Consolidated Statements of Income:

 Three Months EndedSix Months Ended
 March 30,
2024
April 1,
2023
March 30,
2024
April 1,
2023
Cost of revenues$3.2 $2.7 $5.9 $5.6 
Research and development3.0 3.1 6.2 6.5 
Selling and marketing3.6 3.0 6.9 6.3 
General and administrative16.0 14.4 35.5 25.3 
$25.8 $23.2 $54.5 $43.7 
Weighted-Average Assumptions Utilized to Value Stock Options
The Company uses a binomial model to determine the fair value of its stock options. The weighted-average assumptions utilized to value these stock options are indicated in the following table:

 Three Months EndedSix Months Ended
 March 30,
2024
April 1,
2023
March 30,
2024
April 1,
2023
Risk-free interest rate4.4 %4.3 %4.4 %4.3 %
Expected volatility33.4 %33.9 %33.4 %33.9 %
Expected life (in years)4.84.84.84.8
Dividend yield— — — — 
Weighted average fair value of options granted$26.27 $27.42 $25.04 $25.92