Stock-Based Compensation (Tables)

9 Months Ended

Jun. 25, 2016

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 Income:

	Three Months Ended				Nine Months Ended
	June 25, 2016		June 27, 2015		June 25, 2016		June 27, 2015
Cost of revenues	$	2.2	$	2.3	$	6.9	$	6.5
Research and development	2.4		2.0		7.3		6.1
Selling and marketing	2.5		2.1		7.8		6.4
General and administrative	7.4		9.4		23.1		22.5
Restructuring and divestiture	—		0.6		—		0.7
	$	14.5	$	16.4	$	45.1	$	42.2

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 25, 2016			June 27, 2015			June 25, 2016			June 27, 2015
Risk-free interest rate	1.6		%	1.7		%	1.6		%	1.7		%
Expected volatility	37.8		%	38.6		%	37.8		%	38.6		%
Expected life (in years)	4.7			5.3			4.7			5.3
Dividend yield	—			—			—			—
Weighted average fair value of options granted	$	11.36		$	12.07		$	12.95		$	9.73