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Selected Quarterly Financial Data (Unaudited)
 12 Months Ended
Jul. 31, 2019
Quarterly Financial Information Disclosure [Abstract]  
Selected Quarterly Financial Data (Unaudited)
14. Selected Quarterly Financial Data (Unaudited)
The following tables contain selected quarterly financial data for the twelve months ended July 31, 2019 and July 31, 2018.
 
Fiscal 2019 Quarter Ended
(In millions, except per share amounts)
October 31
 
January 31
 
April 30
 
July 31
Total net revenue
$
1,016

 
$
1,502

 
$
3,272

 
$
994

Cost of revenue
247

 
285

 
354

 
281

All other costs and expenses
779

 
984

 
1,134

 
866

Operating income (loss)
(10
)
 
233

 
1,784

 
(153
)
Net income (loss)
34

 
189

 
1,378

 
(44
)
 
 
 
 
 
 
 
 
Basic net income (loss) per share
$
0.13

 
$
0.73

 
$
5.30

 
$
(0.17
)
 
 
 
 
 
 
 
 
Diluted net income (loss) per share
$
0.13

 
$
0.72

 
$
5.22

 
$
(0.17
)


 
Fiscal 2018 Quarter Ended
(In millions, except per share amounts)
October 31
 
January 31
 
April 30
 
July 31
Total net revenue
$
910

 
$
1,339

 
$
2,912

 
$
864

Cost of revenue
198

 
246

 
305

 
229

All other costs and expenses
747

 
899

 
1,006

 
835

Operating income (loss)
(35
)
 
194

 
1,601

 
(200
)
Net income (loss)
(2
)
 
183

 
1,186

 
(38
)
 
 
 
 
 
 
 
 
Basic net income (loss) per share
$
(0.01
)
 
$
0.72

 
$
4.62

 
$
(0.15
)
 
 
 
 
 
 
 
 
Diluted net income (loss) per share
$
(0.01
)
 
$
0.70

 
$
4.53

 
$
(0.15
)