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LONG-TERM DEBT (Tables) | 6 Months Ended
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Apr. 30, 2019
Debt Disclosure [Abstract] |
Schedule of Senior Notes and Related Interest Rate Swaps | The following table summarizes the company’s long-term senior notes and the related interest rate swaps:
| April 30, 2019 |  | October 31, 2018
| Amortized Principal |  | Swap |  | Total |  | Amortized Principal |  | Swap |  | Total
| (in millions)
2020 Senior Notes | 499 |  |  | 5 |  |  | 504 |  |  | 499 |  |  | 7 |  |  | 506 |
2022 Senior Notes | 399 |  |  | — |  |  | 399 |  |  | 399 |  |  | — |  |  | 399 |
2023 Senior Notes | 597 |  |  | — |  |  | 597 |  |  | 597 |  |  | — |  |  | 597 |
2026 Senior Notes | 298 |  |  | — |  |  | 298 |  |  | 297 |  |  | — |  |  | 297 |
Total | $ | 1,793 |  |  | $ | 5 |  |  | $ | 1,798 |  |  | $ | 1,792 |  |  | $ | 7 |  |  | $ | 1,799 |

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