Stock-Based Compensation (Tables)

6 Months Ended

Mar. 28, 2015

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				Six Months Ended
	March 28, 2015		March 29, 2014		March 28, 2015		March 29, 2014
Cost of revenues	$	2.3	$	2.1	$	4.3	$	3.6
Research and development	2.2		2.2		4.1		4.1
Selling and marketing	2.3		2.4		4.3		4.1
General and administrative	6.9		5.7		13.0		9.5
Restructuring and divestiture	—		—		0.1		4.8
	$	13.7	$	12.4	$	25.8	$	26.1

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						Six Months Ended
	March 28, 2015			March 29, 2014			March 28, 2015			March 29, 2014
Risk-free interest rate	1.7		%	1.3		%	1.7		%	1.2		%
Expected volatility	38.6		%	41.4		%	38.6		%	41.4		%
Expected life (in years)	5.3			4.5			5.3			4.4
Dividend yield	—			—			—			—
Weighted average fair value of options granted	$	10.36		$	7.82		$	9.55		$	7.65