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Stockholders' Deficit (Tables) | 3 Months Ended
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Jan. 31, 2019
Stockholders' Equity Note [Abstract] |
Schedule of Tax Effects Related to Other Comprehensive (Loss) Income | Tax effects related to Other Comprehensive Loss
| Three months ended January 31
| 2019 |  | 2018
| In millions
Tax effect on change in unrealized components of available-for-sale debt securities: |  |  |  |  |
Tax benefit on unrealized losses arising during the period | $ | — |  |  | $ | 1 |
| — |  |  | 1 |
Tax effect on change in unrealized components of cash flow hedges: |  |  |  |
Tax benefit on unrealized losses arising during the period | 20 |  |  | 70 |
Tax provision (benefit) on (gains) losses reclassified into earnings | 22 |  |  | (3 | )
| 42 |  |  | 67 |
Tax effect on change in unrealized components of defined benefit plans: |  |  |  |  |
Tax provision on amortization of actuarial loss and prior service benefit | (3 | ) |  | (3 | )
Tax benefit on settlements and other | 1 |  |  | — |
| (2 | ) |  | (3 | )
Tax effect on change in cumulative translation adjustment | — |  |  | — |
Tax benefit on other comprehensive loss | $ | 40 |  |  | $ | 65 |
Schedule of Changes and Reclassifications Related to Other Comprehensive Income, Net of Taxes | Changes and reclassifications related to Other Comprehensive Loss, net of taxes
| Three months ended January 31
| 2019 |  | 2018
| In millions
Other comprehensive loss, net of taxes: |  |  |  |  |
Change in unrealized components of available-for-sale debt securities: |  |  |  |  |
Unrealized losses arising during the period | $ | — |  |  | $ | (2 | )
Gains reclassified into earnings | — |  |  | (5 | )
| — |  |  | (7 | )
Change in unrealized components of cash flow hedges: |  |  |  |
Unrealized losses arising during the period | (87 | ) |  | (481 | )
(Gains) losses reclassified into earnings | (157 | ) |  | 67 |
| (244 | ) |  | (414 | )
Change in unrealized components of defined benefit plans: |  |  |  |  |
Amortization of actuarial loss and prior service benefit(1) | 8 |  |  | 9 |
Settlements and other | (1 | ) |  | 1 |
| 7 |  |  | 10 |
Change in cumulative translation adjustment | (5 | ) |  | — |
Other comprehensive loss, net of taxes | $ | (242 | ) |  | $ | (411 | )
(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 Loss, Net of Taxes | The components of accumulated other comprehensive loss, net of taxes and changes were as follows:
| Three months ended January 31, 2019
| Net unrealized gains 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 loss
| In millions
Balance at beginning of period | $ | 5 |  |  | $ | 291 |  |  | $ | (1,141 | ) |  | $ | — |  |  | $ | (845 | )
Other comprehensive loss before reclassifications | — |  |  | (87 | ) |  | — |  |  | (5 | ) |  | (92 | )
Reclassifications of (gain) loss into earnings | — |  |  | (157 | ) |  | 8 |  |  | — |  |  | (149 | )
Reclassifications of settlements into earnings | — |  |  | — |  |  | (1 | ) |  | — |  |  | (1 | )
Balance at end of period | $ | 5 |  |  | $ | 47 |  |  | $ | (1,134 | ) |  | $ | (5 | ) |  | $ | (1,087 | )

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- Definition Tabular disclosure of components of comprehensive income (loss). Includes, but is not limited to, foreign currency translation adjustments, foreign currency transactions designated as economic hedges of a net investment in foreign entity, gain (loss) and prior service cost (credit) for pension plans and other postretirement benefit plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e526-108580 + Details
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