Stock-Based Compensation (Tables)

9 Months Ended

Jun. 29, 2019

Disclosure of Compensation Related Costs, Share-based Payments [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				Nine Months Ended
	June 29, 2019		June 30, 2018		June 29, 2019		June 30, 2018
Cost of revenues	$	1.5	$	1.8	$	5.5	$	6.5
Research and development	2.0		2.2		7.4		7.6
Selling and marketing	2.5		2.6		7.9		8.0
General and administrative	7.9		10.6		27.7		29.7
Restructuring	—		—		—		1.3
	$	13.9	$	17.2	$	48.5	$	53.1

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				Nine Months Ended
	June 29, 2019			June 30, 2018	June 29, 2019			June 30, 2018
Risk-free interest rate	3.0		%	**	3.0		%	2.1		%
Expected volatility	34.3		%	**	34.3		%	35.3		%
Expected life (in years)	4.8			**	4.8			4.7
Dividend yield	—			**	—			—
Weighted average fair value of options granted	$	15.07		**	$	13.51		$	12.98