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Description of Business and Summary of Significant Accounting Policies (Tables)
 3 Months Ended
Oct. 31, 2017
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,
2017
 
October 31,
2016
Numerator:
 
 
 
Net loss
$
(17
)
 
$
(30
)
 
 
 
 
Denominator:
 
 
 
Shares used in basic per share amounts:
 
 
 
Weighted average common shares outstanding
256

 
258

 
 
 
 
Shares used in diluted per share amounts:
 
 
 
Weighted average common shares outstanding
256

 
258

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

 
—

Dilutive weighted average common shares outstanding
256

 
258

 
 
 
 
Basic and diluted net loss per share:
 
 
 
Basic net loss per share
$
(0.07
)
 
$
(0.12
)
 
 
 
 
Diluted net loss per share
$
(0.07
)
 
$
(0.12
)
 
 
 
 
Shares excluded from computation of diluted net loss 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

 
12

 
 
 
 
Weighted average stock options and restricted stock units that would have been excluded from the computation of dilutive common equivalent shares outstanding if net income had been reported in the period due to their anti-dilutive effect
2

 
4