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Description of Business and Summary of Significant Accounting Policies (Tables)
 3 Months Ended
Oct. 31, 2011
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.
 
Three Months Ended
(In millions, except per share amounts)
October 31,
2011
 
October 31,
2010
Numerator:
 
 
 
Net loss
$
(64
)
 
$
(70
)
 
 
 
 
Denominator:
 
 
 
Shares used in basic and diluted per share amounts:
 
 
 
Weighted average common shares outstanding
300

 
316

 
 
 
 
Basic and diluted net loss per share:
 
 
 
Basic net loss per share
$
(0.21
)
 
$
(0.22
)
Diluted net loss per share
$
(0.21
)
 
$
(0.22
)
 
 
 
 
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
28

 
33

Weighted average stock options and restricted stock units excluded from calculation due to anti-dilutive effect
3

 
5