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LONG-TERM DEBT - Carrying Value (Details) - USD ($) $ in Millions | Oct. 31, 2020 | Oct. 31, 2019
--- | --- | ---
Debt Instrument [Line Items] |  |
Senior Notes Amortized principal | $ 2,284 | $ 1,786
Senior Notes 2022 |  |
Debt Instrument [Line Items] |  |
Senior Notes Amortized principal | 400 | 399
Senior Notes 2023 [Member] |  |
Debt Instrument [Line Items] |  |
Senior Notes Amortized principal | 598 | 597
Senior Notes 2026 |  |
Debt Instrument [Line Items] |  |
Senior Notes Amortized principal | 298 | 298
Senior Notes 2029 |  |
Debt Instrument [Line Items] |  |
Senior Notes Amortized principal | 493 | 492
Senior Notes 2030 [Member] |  |
Debt Instrument [Line Items] |  |
Senior Notes Amortized principal | $ 495 | $ 0

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