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INCOME TAXES INCOME TAXES - Uncertain Tax Positions (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Unrecognized Tax Benefits Rollforward
Balance, beginning of year	$ 206	$ 214	$ 224
Additions for tax positions related to the current year	6	7	27
Additions for tax positions from prior years	0	12	2
Reductions for tax positions from prior years	0	2	13
Statute of limitations expirations	17	25	26
Balance, end of year	195	206	214
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense [Abstract]
Unrecognized tax benefit including interest and penalties	240
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	215
Unrecognized tax benefits that would not impact the effective tax rate	25
Interest and penalties accrued related to unrecognized tax benefits accrued and reported	45	36
Tax Interest and Penalties
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense [Abstract]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	$ 8	$ 9	$ 11

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Unrecognized tax benefit including interest and penalties.

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The total amount of unrecognized tax benefits that, if recognized, would not affect the effective tax rate.

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Amount of unrecognized tax benefits.

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-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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