Stockholders' Equity (Tables)
 6 Months Ended
Apr. 30, 2018
Equity [Abstract]  
Taxes Related to Other Comprehensive Income (Loss)
Taxes related to Other Comprehensive Income (Loss)
 
Three months ended April 30,
 
Six months ended April 30,
 
2018
 
2017
 
2018
 
2017
 
In millions
Taxes on change in net unrealized losses on available-for-sale securities:
 

 
 

 
 
 
 
Tax provision on net unrealized (losses) gains arising during the period
$
—

 
$
—

 
$
—

 
$
(1
)
 
—

 
—

 
—

 
(1
)
Taxes on change in net unrealized gains (losses) on cash flow hedges:
 

 
 

 
 
 
 
Tax (provision) benefit on net unrealized gains (losses) arising during the period
(11
)
 
4

 
14

 
(27
)
Tax (benefit) provision on net losses (gains) reclassified into earnings
(12
)
 
13

 
(16
)
 
45

 
(23
)
 
17

 
(2
)
 
18

Taxes on change in unrealized components of defined benefit plans:
 

 
 

 
 
 
 
Tax provision on gains arising during the period
—

 
(1
)
 
(1
)
 
(25
)
Tax benefit on amortization of actuarial loss and prior service benefit
(3
)
 
(5
)
 
(6
)
 
(11
)
Tax provision on curtailments, settlements and other
—

 
(7
)
 
(7
)
 
(14
)
 
(3
)
 
(13
)
 
(14
)
 
(50
)
Tax benefit on change in cumulative translation adjustment
4

 
—

 
1

 
1

Tax (provision) benefit on other comprehensive (loss) income
$
(22
)
 
$
4

 
$
(15
)
 
$
(32
)
Changes and Reclassifications Related to Other Comprehensive Income (Loss), Net of Taxes
Changes and reclassifications related to Other Comprehensive Income (Loss), net of taxes
 
Three months ended April 30,
 
Six months ended April 30,
 
2018
 
2017
 
2018
 
2017
 
In millions
Other comprehensive income, net of taxes:
 

 
 

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

 
 

 
 
 
 
Net unrealized (losses) gains arising during the period
$
—

 
$
(4
)
 
$
1

 
$
(18
)
Gains reclassified into earnings
(17
)
 
—

 
(9
)
 
—

 
(17
)
 
(4
)
 
(8
)
 
(18
)
Change in net unrealized gains (losses) on cash flow hedges:
 

 
 

 
 
 
 
Net unrealized gains (losses) arising during the period
71

 
8

 
(85
)
 
113

Net losses (gains) reclassified into earnings(1)
79

 
(70
)
 
105

 
(201
)
 
150

 
(62
)
 
20

 
(88
)
Change in unrealized components of defined benefit plans:
 

 
 

 
 
 
 
Gains arising during the period
—

 
10

 
1

 
465

Amortization of actuarial loss and prior service benefit(2)
46

 
72

 
90

 
163

Curtailments, settlements and other
2

 
(4
)
 
(5
)
 
(11
)
 
48

 
78

 
86

 
617

Change in cumulative translation adjustment
(22
)
 
(11
)
 
1

 
(35
)
Other comprehensive income, net of taxes
$
159

 
$
1

 
$
99

 
$
476

 
(1)
For more details on the reclassification of pre-tax net losses (gains) on cash flow hedges into the Condensed Consolidated Statements of Earnings, see Note 12, "Financial Instruments".
(2)
These components are included in the computation of net pension and post-retirement benefit cost in Note 6, "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 April 30, 2018, and changes during the six months ended April 30, 2018 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
$
29

 
$
(48
)
 
$
(2,690
)
 
$
(186
)
 
$
(2,895
)
Activity related to separation and merger transactions
—


—


—


(186
)

(186
)
Other comprehensive income (loss) before reclassifications
1

 
(85
)
 
1

 
1

 
(82
)
Reclassifications of (gains) losses into earnings
(9
)
 
105

 
85

 
—

 
181

Balance at end of period
$
21

 
$
(28
)
 
$
(2,604
)
 
$
(371
)
 
$
(2,982
)