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REVENUE Contract liabilities (Details) - USD ($) $ in Millions |  | 12 Months Ended
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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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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130531-203044 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130532-203044 + Details
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