Stockholders' Equity (Tables)

6 Months Ended

Jan. 31, 2017

Equity [Abstract]

Total share-based compensation expense

The following table summarizes the total share-based compensation expense that we recorded in operating income from continuing operations for the periods shown.

	Three Months Ended				Six Months Ended
(In millions, except per share amounts)	January 31, 2017		January 31, 2016		January 31, 2017		January 31, 2016
Cost of revenue	$	2	$	2	$	4	$	4
Selling and marketing	22		18		47		37
Research and development	29		21		65		42
General and administrative	28		24		54		49
Total share-based compensation expense	$	81	$	65	$	170	$	132

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, 2017 was as follows:

(Shares in thousands)	Shares Available for Grant
Balance at July 31, 2016	8,990
Additional shares authorized	23,110
Options granted	(16	)
Restricted stock units granted (1)	(1,360	)
Share-based awards canceled/forfeited/expired (1)(2)	2,123
Balance at January 31, 2017	32,847

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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 restricted stock units 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 restricted stock units that were granted on or after July 21, 2016 are also returned to the pool of shares available for grant. Stock options and restricted stock units 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, 2017 was as follows:

	Options Outstanding
(Shares in thousands)	Number of Shares		Weighted Average Exercise Price Per Share
Balance at July 31, 2016	8,346		$	88.55
Granted	16		116.47
Exercised	(728	)	67.81
Canceled or expired	(159	)	96.36
Balance at January 31, 2017	7,475		$	90.46
Exercisable at January 31, 2017	3,673		$	72.52

Summary of restricted stock unit activity

A summary of restricted stock unit (RSU) activity for the six months ended January 31, 2017 was as follows:

	Restricted Stock Units
(Shares in thousands)	Number of Shares		Weighted Average Grant Date Fair Value
Nonvested at July 31, 2016	9,039		$	82.30
Granted	591		111.92
Vested	(1,134	)	61.94
Forfeited	(830	)	70.36
Nonvested at January 31, 2017	7,666		$	88.89