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LONG-TERM DEBT (Details) - USD ($) $ in Millions | Jul. 31, 2018 | Oct. 31, 2017
--- | --- | ---
Debt Instrument |  |
Amortized principal | $ 1,791 | $ 1,790
Interest rate swap | 8 | 11
Long-term debt | 1,799 | 1,801
Senior Notes 2020 |  |
Debt Instrument |  |
Amortized principal | 500 | 499
Interest rate swap | 8 | 11
Long-term debt | 508 | 510
Senior Notes 2022 |  |
Debt Instrument |  |
Amortized principal | 398 | 398
Interest rate swap | 0 | 0
Long-term debt | 398 | 398
Senior Notes 2023 |  |
Debt Instrument |  |
Amortized principal | 596 | 596
Interest rate swap | 0 | 0
Long-term debt | 596 | 596
Senior Notes 2026 |  |
Debt Instrument |  |
Amortized principal | 297 | 297
Interest rate swap | 0 | 0
Long-term debt | $ 297 | $ 297

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