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Description of Business and Summary of Significant Accounting Policies (Tables)
 3 Months Ended
Oct. 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 loss per share for the periods indicated.
 
Three Months Ended
(In millions, except per share amounts)
October 31,
2015
 
October 31,
2014
Numerator:
 
 
 
Net loss from continuing operations
$
(31
)
 
$
(81
)
Net loss from discontinued operations
—

 
(3
)
Net loss
$
(31
)
 
$
(84
)
 
 
 
 
Denominator:
 
 
 
Shares used in basic per share amounts:
 
 
 
Weighted average common shares outstanding
272

 
286

 
 
 
 
Shares used in diluted per share amounts:
 
 
 
Weighted average common shares outstanding
272

 
286

Dilutive common equivalent shares from stock options
 
 
 
and restricted stock awards
—

 
—

Dilutive weighted average common shares outstanding
272

 
286

 
 
 
 
Basic and diluted net loss per share:
 
 
 
Basic net loss per share from continuing operations
$
(0.11
)
 
$
(0.28
)
Basic net loss per share from discontinued operations
—

 
(0.01
)
Basic net loss per share
$
(0.11
)
 
$
(0.29
)
 
 
 
 
Diluted net loss per share from continuing operations
$
(0.11
)
 
$
(0.28
)
Diluted net loss per share from discontinued operations
—

 
(0.01
)
Diluted net loss per share
$
(0.11
)
 
$
(0.29
)
 
 
 
 
Shares excluded from computation of diluted net income
per share:
 
 
 
Weighted average stock options and restricted stock units that would have been included in the computation of dilutive common equivalent shares outstanding if net income had been reported in the period
12

 
16

 
 
 
 
Weighted average stock options and restricted stock units excluded from computation due to anti-dilutive effect
4

 
2