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INCOME TAXES - Current and long-term income tax assets and liabilities (Details) - USD ($) $ in Millions | Oct. 31, 2019 | Oct. 31, 2018
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Income Tax Disclosure [Abstract] |  |
Current income tax assets (included within other current assets) | $ 68 | $ 59
Long-term income tax assets (included within other assets) | 4 | 19
Current income tax liabilities (included within other accrued liabilities) | 292 | 71
Long-term income tax liabilities (included within other long-term liabilities) | 328 | 607
Total | $ 548 | $ 600

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