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Stockholders’ Deficit (Tables)
 12 Months Ended
Oct. 31, 2018
Stockholders' Equity Note [Abstract]  
Taxes Related to Other Comprehensive Income (Loss)
Taxes related to Other Comprehensive Income (Loss)
 
For the fiscal years ended
October 31
 
2018
 
2017
 
2016
 
In millions
Tax effect on change in unrealized components of available-for-sale securities:
 

 
 

 
 

Tax benefit (provision) on unrealized (losses) gains arising during the period
$
1

 
$
(1
)
 
$
(3
)
 


 


 


Tax effect on change in unrealized components of cash flow hedges:
 
 
 

 
 

Tax (provision) benefit on unrealized gains (losses) arising during the period
(42
)
 
42

 
32

Tax benefit on losses reclassified into earnings
(26
)
 
(16
)
 
(1
)
 
(68
)
 
26

 
31

Tax effect on change in unrealized components of defined benefit plans:
 
 
 

 
 

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

 
(140
)
 
242

Tax provision on amortization of actuarial loss and prior service benefit
(11
)
 
(21
)
 
(12
)
Tax (provision) benefit on curtailments, settlements and other
(2
)
 
72

 
(213
)
 
(13
)
 
(89
)
 
17

Tax (provision) benefit on other comprehensive income (loss)
$
(80
)

$
(64
)

$
45
Changes and Reclassifications Related to Other Comprehensive Loss, Net of Taxes
Changes and reclassifications related to Other Comprehensive Income (Loss), net of taxes
 
For the fiscal years ended
October 31
 
2018
 
2017
 
2016
 
In millions
Other comprehensive income (loss), net of taxes:
 

 
 

 
 

Change in unrealized components of available-for-sale securities:
 

 
 

 
 

Unrealized (losses) gains arising during the period
$
(2
)
 
$
3

 
$
(2
)
Gains reclassified into earnings
(5
)
 
—

 
—

 
(7
)
 
3

 
(2
)
Change in unrealized components of cash flow hedges:
 

 
 

 
 

Unrealized gains (losses) arising during the period
299

 
(609
)
 
231

Losses reclassified into earnings
232

 
183

 
62

 
531

 
(426
)
 
293

Change in unrealized components of defined benefit plans:
 

 
 

 
 

Gains (Losses) arising during the period
11

 
315

 
(517
)
Amortization of actuarial loss and prior service benefit(1)
37

 
53

 
39

Curtailments, settlements and other
1

 
75

 
(30
)
 
49

 
443

 
(508
)
Other comprehensive income (loss), net of taxes
$
573

 
$
20

 
$
(217
)
(1) 
These components are included in the computation of net pension and post-retirement benefit (credit) charges in Note 4,
“Retirement and Post-Retirement Benefit Plans”.
Components of Accumulated Other Comprehensive Loss, Net of Taxes
The components of accumulated other comprehensive loss, net of taxes as of October 31, 2018 and changes during fiscal year 2018 were as follows:
 
Net unrealized
gain on
available-for-sale
securities

Net unrealized
(loss) gain on 
cash flow 
hedges

Unrealized
components
of defined
benefit plans

Accumulated
other
comprehensive
loss
 
In millions
Balance at beginning of period
$
12


$
(240
)

$
(1,190
)

$
(1,418
)
Other comprehensive (loss) income before reclassifications
(2
)

299


11


308

Reclassifications of (gain) loss into earnings
(5
)

232


38


265

Balance at end of period
$
5

 
$
291

 
$
(1,141
)
 
$
(845
)