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Net Earnings (Loss) Per Share (Tables)
 6 Months Ended
Apr. 30, 2017
Earnings Per Share [Abstract]  
Basic and diluted net Earnings Per Share calculations
The reconciliations of the numerators and denominators of each of the basic and diluted net EPS calculations were as follows:
 
Three months ended April 30,
 
Six months ended April 30,
 
2017
 
2016
 
2017
 
2016
 
In millions, except per share amounts
Numerator:
 

 
 

 
 
 
 
(Loss) earnings from continuing operations
$
(487
)
 
$
322

 
$
(232
)
 
$
684

(Loss) earnings from discontinued operations
(125
)
 
(2
)
 
(113
)
 
(97
)
Net (loss) earnings
$
(612
)
 
$
320

 
$
(345
)
 
$
587

Denominator:
 

 
 

 
 

 
 

Weighted-average shares used to compute basic net EPS
1,658

 
1,725

 
1,664

 
1,743

Dilutive effect of employee stock plans(1)
—

 
26

 
—

 
22

Weighted-average shares used to compute diluted net EPS(1)
1,658

 
1,751

 
1,664

 
1,765

Basic net (loss) earnings per share:
 

 
 

 
 

 
 
Continuing operations
$
(0.29
)
 
$
0.19

 
$
(0.14
)
 
$
0.39

Discontinued operations
(0.08
)
 
—

 
(0.07
)
 
(0.06
)
Basic net (loss) earnings per share
$
(0.37
)
 
$
0.19

 
$
(0.21
)
 
$
0.33

Diluted net (loss) earnings per share:(1)
 
 
 
 
 
 
 
Continuing operations
$
(0.29
)
 
$
0.18

 
$
(0.14
)
 
$
0.39

Discontinued operations(2)
(0.08
)
 
—

 
(0.07
)
 
(0.06
)
Diluted net (loss) earnings per share
$
(0.37
)
 
$
0.18

 
$
(0.21
)
 
$
0.33

Anti-dilutive weighted-average stock awards(1)
85

 
46

 
90

 
51

 
(1)
The Company excludes shares potentially issuable under employee stock plans that could dilute basic EPS in the future from the calculation of diluted net earnings (loss) per share, as their effect, if included, would have been anti-dilutive for the periods presented.
(2)
U.S. GAAP requires the denominator used in the diluted EPS calculation for discontinued operations to be the same as that of continuing operations, regardless of net earnings (loss) from continuing operations.