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REVENUE Contract liabilities (Details) - USD ($) $ in Millions		12 Months Ended
	Jun. 14, 2019	Oct. 31, 2020
Revenue from Contract with Customer [Abstract]
Balance at October 31, 2019		$ 510
Deferral of revenue billed in current period, net of recognition		377
Deferred revenue arising out of acquisitions	$ 10
Revenue recognized that was deferred as of the beginning of the period		(336)
Foreign Currency Exchange Rate, Translation		5
Capitalized Contract Cost [Line Items]
Balance at October 31, 2020		$ 566

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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

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Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

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