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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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Amount, after accumulated amortization, of debt discount (premium).

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