Stockholders' Equity (Tables)

6 Months Ended

Jan. 31, 2018

Equity [Abstract]

Total share-based compensation expense

The following table summarizes the total share-based compensation expense that we recorded in operating income (loss) for the periods shown.

	Three Months Ended				Six Months Ended
(In millions)	January 31, 2018		January 31, 2017		January 31, 2018		January 31, 2017
Cost of revenue	$	13	$	2	$	16	$	4
Selling and marketing	25		22		50		47
Research and development	30		29		69		65
General and administrative	26		28		56		54
Total share-based compensation expense	$	94	$	81	$	191	$	170

Summary of share-based awards available for grant

A summary of share-based awards available for grant under our 2005 Equity Incentive Plan for the six months ended January 31, 2018 was as follows:

(Shares in thousands)	Shares Available for Grant
Balance at July 31, 2017	25,164
Options granted	—
Restricted stock units granted (1)	(991	)
Share-based awards canceled/forfeited/expired (1)(2)	1,984
Balance at January 31, 2018	26,157

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(1) RSUs granted from the pool of shares available for grant under our 2005 Equity Incentive Plan reduce the pool by 2.3 shares for each share granted. RSUs forfeited and returned to the pool of shares available for grant increase the pool by 2.3 shares for each share forfeited.

(2)

Stock options and RSUs canceled, expired or forfeited under our 2005 Equity Incentive Plan are returned to the pool of shares available for grant. Shares withheld for income taxes upon vesting of RSUs that were granted on or after July 21, 2016 are also returned to the pool of shares available for grant. Stock options and RSUs canceled, expired or forfeited under older expired plans are not returned to the pool of shares available for grant

Summary of stock option activity

A summary of stock option activity for the six months ended January 31, 2018 was as follows:

	Options Outstanding
(Shares in thousands)	Number of Shares		Weighted Average Exercise Price Per Share
Balance at July 31, 2017	7,488		$	104.50
Granted	—		—
Exercised	(1,345	)	82.11
Canceled or expired	(181	)	116.87
Balance at January 31, 2018	5,962		$	109.17
Exercisable at January 31, 2018	2,892		$	92.17

Summary of restricted stock unit activity

A summary of restricted stock unit (RSU) activity for the six months ended January 31, 2018 was as follows:

	Restricted Stock Units
(Shares in thousands)	Number of Shares		Weighted Average Grant Date Fair Value
Nonvested at July 31, 2017	8,636		$	98.76
Granted	431		149.35
Unregistered restricted stock granted in connection with acquisitions	75		163.00
Vested	(840	)	72.58
Forfeited	(723	)	86.02
Nonvested at January 31, 2018	7,579		$	106.39