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Stockholders' Deficit (Tables) | 6 Months Ended
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Apr. 30, 2023
Stockholders' Equity Note [Abstract] |
Schedule of Tax Effects Related to Other Comprehensive Income (Loss) | Tax effects related to Other Comprehensive Income (Loss)
| Three months ended April 30 |  | Six months ended April 30
| 2023 |  | 2022 |  | 2023 |  | 2022
| In millions
Tax effect on change in unrealized components of available-for-sale debt securities: |  |  |  |  |  |  |
Tax benefit (provision) on unrealized (losses) gains arising during the period | $ | — |  |  | $ | 1 |  |  | $ | (1) |  |  | $ | 1 |
Tax effect on change in unrealized components of cash flow hedges: |  |  |  |  |  |  |
Tax benefit (provision) on unrealized (losses) gains arising during the period | 20 |  |  | (114) |  |  | 126 |  |  | (146) |
Tax (benefit) provision on losses (gains) reclassified into earnings | (41) |  |  | 24 |  |  | 37 |  |  | 36 |
| (21) |  |  | (90) |  |  | 163 |  |  | (110) |
Tax effect on change in unrealized components of defined benefit plans: |  |  |  |  |  |  |
Tax (provision) benefit on gains (losses) arising during the period | (1) |  |  | — |  |  | 8 |  |  | (6) |
Tax benefit on amortization of actuarial loss and prior service benefit | — |  |  | (1) |  |  | — |  |  | (2) |
Tax provision on curtailments, settlements and other | — |  |  | (1) |  |  | — |  |  | (1) |
| (1) |  |  | (2) |  |  | 8 |  |  | (9) |
Tax effect on change in cumulative translation adjustment | — |  |  | 1 |  |  | — |  |  | 2 |
Tax (provision) benefit on other comprehensive income (loss) | $ | (22) |  |  | $ | (90) |  |  | $ | 170 |  |  | $ | (116) |
Schedule of 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
| 2023 |  | 2022 |  | 2023 |  | 2022
| In millions
Other comprehensive income (loss), net of taxes: |  |  |  |  |  |  |
Change in unrealized components of available-for-sale debt securities: |  |  |  |  |  |  |
Unrealized (losses) gains arising during the period | $ | — |  |  | $ | (3) |  |  | $ | 3 |  |  | $ | (5) |
Change in unrealized components of cash flow hedges: |  |  |  |  |  |  |
Unrealized (losses) gains arising during the period | (46) |  |  | 489 |  |  | (563) |  |  | 756 |
Losses (gains) reclassified into earnings | 121 |  |  | (96) |  |  | (135) |  |  | (128) |
| 75 |  |  | 393 |  |  | (698) |  |  | 628 |
Change in unrealized components of defined benefit plans: |  |  |  |  |  |  |
Gains (losses) arising during the period | 5 |  |  | 1 |  |  | (24) |  |  | 16 |
Amortization of actuarial loss and prior service benefit(1) | — |  |  | 4 |  |  | — |  |  | 9 |
Curtailments, settlements and other | (1) |  |  | (1) |  |  | — |  |  | (1) |
| 4 |  |  | 4 |  |  | (24) |  |  | 24 |
Change in cumulative translation adjustment | 9 |  |  | (31) |  |  | 38 |  |  | (40) |
Other comprehensive income (loss), net of taxes | $ | 88 |  |  | $ | 363 |  |  | $ | (681) |  |  | $ | 607 |
(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”.
Schedule of Accumulated Other Comprehensive Income (Loss), Net of Taxes | The components of Accumulated other comprehensive income (loss), net of taxes and changes were as follows:
| Six months ended April 30, 2023
| Net unrealized gains (losses) on available-for-sale debt securities |  | Net unrealized gains (losses) on cash flow hedges |  | Unrealized components of defined benefit plans |  | Change in cumulative translation adjustment |  | Accumulated other comprehensive income (loss)
| In millions
Balance at beginning of period | $ | 6 |  |  | $ | 648 |  |  | $ | (295) |  |  | $ | (46) |  |  | $ | 313 |
Other comprehensive gain (loss) before reclassifications | 3 |  |  | (563) |  |  | (24) |  |  | 38 |  |  | (546) |
Reclassifications of gain into earnings | — |  |  | (135) |  |  | — |  |  | — |  |  | (135) |
Balance at end of period | $ | 9 |  |  | $ | (50) |  |  | $ | (319) |  |  | $ | (8) |  |  | $ | (368) |

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