Description of Business and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Jul. 31, 2015

Accounting Policies [Abstract]

Composition of shares used in the computation of basic and diluted net income per share

The following table presents the composition of shares used in the computation of basic and diluted net income per share for the periods indicated.

	Twelve Months Ended July 31,
(In millions, except per share amounts)	2015			2014		2013
Numerator:
Net income from continuing operations	$	413		$	853	$	807
Net income (loss) from discontinued operations	(48		)	54		51
Net income	$	365		$	907	$	858
Denominator:
Shares used in basic per share amounts:
Weighted average common shares outstanding	281			285		297
Shares used in diluted per share amounts:
Weighted average common shares outstanding	281			285		297
Dilutive common equivalent shares from stock options and restricted stock awards	5			6		6
Dilutive weighted average common shares outstanding	286			291		303
Basic and diluted net income per share:
Basic net income per share from continuing operations	$	1.47		$	2.99	$	2.72
Basic net income (loss) per share from discontinued operations	(0.17		)	0.19		0.17
Basic net income per share	$	1.30		$	3.18	$	2.89
Diluted net income per share from continuing operations	$	1.45		$	2.94	$	2.66
Diluted net income (loss) per share from discontinued operations	(0.17		)	0.18		0.17
Diluted net income per share	$	1.28		$	3.12	$	2.83
Weighted average stock options and restricted stock units excluded from     calculation due to anti-dilutive effect	2			—		3