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Stockholders' Equity (Tables)
 12 Months Ended
Oct. 31, 2017
Stockholders' Equity Note [Abstract]  
Schedule of tax effects related to changes in Other Comprehensive (Loss) Income
Taxes related to Other Comprehensive Income (Loss)
 
Fiscal years ended October 31,
 
2017
 
2016
 
2015
 
In millions
Taxes on change in net unrealized losses on available-for-sale securities:
 

 
 

 
 

Tax (provision) benefit on net unrealized losses arising during the period
$
(2
)
 
$
2

 
$
2

Tax provision (benefit) on (gains) losses reclassified into earnings
1

 
(2
)
 
—

 
(1
)

—


2

Taxes on change in net unrealized (losses) gains on cash flow hedges:
 

 
 

 
 

Tax benefit (provision) on net unrealized gains arising during the period
6

 
(14
)
 
(69
)
Tax provision on net gains reclassified into earnings
10

 
25

 
76

 
16


11


7

Taxes on change in unrealized components of defined benefit plans:
 

 
 

 
 

Tax (provision) benefit on gains (losses) arising during the period
(49
)
 
63

 
30

Tax provision on amortization of actuarial loss and prior service benefit
(19
)
 
(20
)
 
(10
)
Tax provision on curtailments, settlements and other
(91
)
 
(1
)
 
—

Tax benefit on plans transferred from former Parent during the period
—

 
—

 
255

 
(159
)

42


275

Taxes on change in cumulative translation adjustment:
 
 
 
 
 
Tax on cumulative translation adjustment arising during the period
(1
)
 
20

 
(73
)
Tax on release of cumulative translation adjustment as a result of H3C and MphasiS divestitures
—

 
(22
)
 
—

 
(1
)
 
(2
)
 
(73
)
Tax (provision) benefit on other comprehensive loss
$
(145
)

$
51


$
211
Schedule of changes and reclassifications related to items of Other Comprehensive (Loss) Income, net of taxes
Changes and reclassifications related to Other Comprehensive Income (Loss), net of taxes
 
Fiscal years ended October 31,
 
2017
 
2016
 
2015
 
In millions
Other comprehensive income (loss), net of taxes:
 

 
 

 
 

Change in net unrealized losses on available-for-sale securities:
 

 
 

 
 

Net unrealized losses arising during the period
$
(10
)
 
$
(2
)
 
$
(8
)
(Gains) losses reclassified into earnings
(3
)
 
1

 
—

 
(13
)
 
(1
)
 
(8
)
Change in net unrealized (losses) gains on cash flow hedges:
 

 
 

 
 

Net unrealized gains arising during the period
52

 
212

 
412

Net gains reclassified into earnings(1)
(135
)
 
(245
)
 
(404
)
 
(83
)
 
(33
)
 
8

Change in unrealized components of defined benefit plans:
 

 
 

 
 

Gains (losses) arising during the period
895

 
(1,714
)
 
(352
)
Amortization of actuarial loss and prior service benefit(2)
266

 
264

 
204

Curtailments, settlements and other
(76
)
 
(19
)
 
4

Plans transferred from former Parent during the period
—

 
—

 
(2,352
)
 
1,085

 
(1,469
)
 
(2,496
)
Change in cumulative translation adjustment:
 
 
 
 
 
Cumulative translation adjustment arising during the period
(15
)
 
(134
)
 
(271
)
Release of cumulative translation adjustment as a result of H3C and MphasiS divestitures
—

 
53

 
—

 
(15
)
 
(81
)
 
(271
)
Other comprehensive income (loss), net of taxes
$
974

 
$
(1,584
)
 
$
(2,767
)
 
(1)
For more details on reclassification of pre-tax (gains) losses on cash flow hedges into the Consolidated and Combined Statements of Earnings, see Note 14, "Financial Instruments".
(2)
These components are included in the computation of net pension and post-retirement benefit (credit) cost in Note 6, "Retirement and Post-Retirement Benefit Plans".
Schedule of Accumulated Other Comprehensive loss, net of taxes
The components of accumulated other comprehensive loss, net of taxes as of October 31, 2017 and changes during fiscal 2017 were as follows:
 
Net unrealized
gains (losses) on
available-for-sale
securities
 
Net unrealized
gains (losses) on cash
flow hedges
 
Unrealized
components
of defined
benefit plans
 
Cumulative
translation
adjustment
 
Accumulated
other
comprehensive
loss
 
In millions
Balance at beginning of period
$
54

 
$
35

 
$
(5,642
)
 
$
(1,046
)
 
$
(6,599
)
Transfer related to the Everett Transaction
(9
)
 
—

 
1,820

 
768

 
2,579

Transfer related to the Seattle Transaction
(3
)
 
—

 
47

 
107

 
151

Other comprehensive (loss) income before reclassifications
(10
)
 
52

 
895

 
(15
)
 
922

Reclassifications of (gains) losses into earnings
(3
)
 
(135
)
 
190

 
—

 
52

Balance at end of period
$
29


$
(48
)

$
(2,690
)

$
(186
)

$
(2,895
)