Stock-Based Compensation (Tables)

3 Months Ended

Dec. 26, 2020

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 Operations:

	Three Months Ended
	December 26, 2020		December 28, 2019
Cost of revenues	$	2.2	$	2.0
Research and development	2.5		2.4
Selling and marketing	2.7		2.8
General and administrative	11.2		10.9
	$	18.6	$	18.1

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 Ended
	December 26, 2020			December 28, 2019
Risk-free interest rate	0.4		%	1.7		%
Expected volatility	35.0		%	33.6		%
Expected life (in years)	4.8			4.8
Dividend yield	—			—
Weighted average fair value of options granted	$	19.86		$	13.83