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Stockholders' Equity
9 Months Ended
Jul. 31, 2020
Equity [Abstract]  
Stockholders' Equity Stockholders' Equity
Taxes related to Other Comprehensive (Loss) Income
 Three months ended July 31,Nine months ended July 31,
 2020201920202019
 In millions
Taxes on change in net unrealized (losses) gains on cash flow hedges:  
Tax benefit (provision) on net unrealized (losses) gains arising during the period$26 $(6)$(6)$(24)
Tax provision (benefit) on net losses (gains) reclassified into earnings5 7 26 31 
31 1 20 7 
Taxes on change in unrealized components of defined benefit plans:  
Tax benefit (provision) on net unrealized (losses) gains arising during the period1 5 1 13 
Tax (provision) benefit on amortization of net actuarial loss and prior service benefit(4)(3)(12)(9)
Tax (provision) benefit on curtailments, settlements and other   (7)
(3)2 (11)(3)
Tax (provision) benefit on change in cumulative translation adjustment (1)4  
Tax benefit (provision) on other comprehensive (loss) income$28 $2 $13 $4 
Changes and reclassifications related to Other Comprehensive (Loss) Income, net of taxes
 Three months ended July 31,Nine months ended July 31,
 2020201920202019
 In millions
Other comprehensive (loss) income, net of taxes:  
Change in net unrealized gains (losses) on available-for-sale securities:  
Net unrealized gains (losses) arising during the period$6 $3 $ $8 
(Gains) losses reclassified into earnings(1) (8)(3)
5 3 (8)5 
Change in net unrealized (losses) gains on cash flow hedges:  
Net unrealized (losses) gains arising during the period(430)57 (91)201 
Net losses (gains) reclassified into earnings247 (51)(15)(228)
(183)6 (106)(27)
Change in unrealized components of defined benefit plans:  
Net unrealized (losses) gains arising during the period(18)(26)(9)(65)
Amortization of net actuarial loss and prior service benefit57 51 171 152 
Curtailments, settlements and other7 5 8 5 
46 30 170 92 
Change in cumulative translation adjustment1 (9)(42)(2)
Other comprehensive (loss) income, net of taxes$(131)$30 $14 $68 
The components of Accumulated other comprehensive loss, net of taxes as of July 31, 2020, and changes during the nine months ended July 31, 2020 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$23 $53 $(3,366)$(437)$(3,727)
Effect of change in accounting principle (1)
 (10) (33)(43)
Other comprehensive (loss) income before reclassifications (91)(9)(42)(142)
Reclassifications of (gains) losses into earnings(8)(15)179  156 
Balance at end of period$15 $(63)$(3,196)$(512)$(3,756)

(1)Reflects the adoption of the FASB guidance on stranded tax effects. For more information, see Note 1 "Overview and Summary of Significant Accounting Policies".
Share Repurchase Program
For the nine months ended July 31, 2020, the Company repurchased and settled a total of 25.3 million shares under its share repurchase program through open market repurchases, which included 0.5 million shares that were unsettled open market repurchases as of October 31, 2019. As of July 31, 2020, the Company had no unsettled open market repurchases of shares. Shares repurchased during the nine months ended July 31, 2020 were recorded as a $346 million reduction to stockholders' equity. As of July 31, 2020, the Company had a remaining authorization of $2.1 billion for future share repurchases.
On April 6, 2020, the Company announced that it suspended purchases under its share repurchase program in response to the global economic uncertainty that resulted from the worldwide spread of COVID-19.