SHAREHOLDERS' EQUITY (Tables)

12 Months Ended

Dec. 31, 2019

Text Block [Abstract]

Number of Reserved and Authorized Shares Under the Equity Incentive Plans

As of December 31, 2019, the number of Reserved and Authorized Shares under the Equity Incentive Plans is as detailed below:

	2019
Stock Options outstanding		10.7
RSU outstanding		1.4
PSU outstanding		*)
Ordinary shares available for issuance under the Equity Incentive Plans		3.7
Total Reserved and Authorized Shares as of December 31, 2019		15.8

*) Represents an amount lower than $0.1

Summary of Stock Option Activity and Related Information

A summary of the Company’s stock option activity and related information is as follows:

	Options			Weighted   average exercise price		Aggregate   intrinsic value
	2019
Outstanding at beginning of year		8.5		$	95.26	$	101.2
Granted		2.8		$	114.73
Exercised		(0.5	)	$	74.74
Forfeited		(0.1	)	$	90.11
Outstanding at December 31, 2019		10.7		$	101.57	$	122.4
Exercisable at December 31, 2019		5.9		$	94.75	$	103.0

Summary of Restricted Stock Units Activity

A summary of the Company’s RSUs activity is as follows:

	Year ended December 31,
	2019
Unvested at beginning of year		1.3
Granted		0.7
Vested		(0.4	)
Forfeited		(0.2	)
Unvested, December 31, 2019		1.4

Stock-based Compensation Expense Related to Stock Options, RSUs and PSUs

Stock-based compensation expense related to stock options, RSUs and PSUs is included in the consolidated statements of operations as follows:

	Year ended December 31,
	2019		2018		2017
Cost of revenues	$	4.4	$	3.6	$	2.7
Research and development		18.9		17.6		16.2
Selling and marketing		28.8		20.8		18.3
General and administrative		54.6		47.3		50.2
	$	106.7	$	89.3	$	87.4