EMPLOYEE STOCK PLANS (Tables)

6 Months Ended

Mar. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

The table below summarizes the share-based compensation expense recognized for employee stock awards and employee stock purchase plan shares:



	Three Months Ended						Six Months Ended
(In millions)	March 30, 2018			March 31, 2017			March 30, 2018			March 31, 2017
Cost of revenues - Product	$	0.8		$	0.8		$	1.5		$	1.6
Cost of revenues - Service	1.0			1.1			2.0			2.1
Research and development	1.2			1.4			2.4			2.6
Selling, general and administrative	7.5			8.1			15.3			15.3
Total share-based compensation expense	$	10.5		$	11.4		$	21.2		$	21.6
Income tax benefit for share-based compensation	$	(2.6	)	$	(3.4	)	$	(4.7	)	$	(6.4	)

Fair Value of Employee Stock Option Plans With Weighted Average Assumptions

The fair value of options granted was estimated at the date of grant using the Black-Scholes model with the following weighted average assumptions:



	Three Months Ended						Six Months Ended
	March 30, 2018			March 31, 2017			March 30, 2018			March 31, 2017
Employee Stock Option Plans
Expected term (in years)	3.83			3.99			3.83			3.99
Risk-free interest rate	2.4		%	1.7		%	2.2		%	1.7		%
Expected volatility	19.2		%	21.8		%	19.0		%	21.8		%
Expected dividend	—		%	—		%	—		%	—		%
Weighted average fair value at grant date	$	21.48		$	16.13		$	20.73		$	16.13

Option Component of ESPP Shares with Weighted Average Assumptions

The option component of employee stock purchase plan shares was estimated at the date of grant using the Black-Scholes model with the following weighted average assumptions:



	Six Months Ended
	March 30, 2018			March 31, 2017
Employee Stock Purchase Plan
Expected term (in years)	0.50			0.50
Risk-free interest rate	1.2		%	0.5		%
Expected volatility	17.9		%	22.3		%
Expected dividend	—		%	—		%
Weighted average fair value at grant date	$	20.97		$	19.37

Summary of Share-Based Awards Available for Grant

A summary of share-based awards available for grant is as follows:



(In millions)	Shares Available for Grant
Balance at September 29, 2017	2.5
Authorized ⁽¹⁾	6.0
Granted	(1.7	)
Cancelled or expired	0.3
Balance at March 30, 2018	7.1


⁽¹⁾	On February 8, 2018, the Company's stockholders approved its Fifth Amended and Restated 2005 Omnibus Stock Plan ("2005 Plan") to increase the number of shares authorized for issuance by 6.0 million shares.

Activity Under Employee Stock Plans

Activity under the Company’s employee stock plans related to stock options is presented below:



	Options Outstanding
(In millions, except per share amounts)	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Term (in years)	Aggregate Intrinsic Value⁽¹⁾
Balance at September 29, 2017	2.3		$	74.08
Granted	0.6		111.43
Cancelled or expired ⁽²⁾	—		75.69
Exercised	(0.5	)	70.67
Balance at March 30, 2018	2.4		$	85.00	5.1	$	89.3

Exercisable at March 30, 2018	1.1		$	73.65	4.0	$	52.0

⁽¹⁾

The aggregate intrinsic value represents the total pre-tax intrinsic value, which is computed based on the difference between the exercise price and the closing price of VMS common stock of $122.65 as of March 29, 2018, the last trading date of the second quarter of fiscal year 2018, and which represents the amount that would have been received by the option holders had all option holders exercised their options and sold the shares received upon exercise as of that date.


⁽²⁾	The cancelled and expired shares were not material for disclosure.

Activity for Restricted Stock, Restricted Stock Units, Deferred Stock Units and Performance Units

The activity for restricted stock, restricted stock units, deferred stock units and performance units is summarized as follows:



(In millions, except per share amounts)	Number of Shares		Weighted Average Grant-Date Fair Value
Balance at September 29, 2017	0.9		$	75.37
Granted	0.3		111.81
Vested	(0.3	)	76.33
Cancelled or expired	(0.1	)	84.16
Balance at March 30, 2018	0.8		$	88.61