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REVENUE Contract with customers, assets and liabilities (Tables) | 12 Months Ended
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Oct. 31, 2019
Revenue from Contract with Customer [Abstract] |
Contract with Customer, Asset and Liability [Table Text Block] | Changes in contract liabilities, current and non-current, during 2019 were as follows:
| Year Ended
| October 31, 2019
| (in millions)
Balance at October 31, 2018 | $ | 461 |
Impact of adopting new revenue standard | (64 | )
Balance at November 1, 2018 | 397 |
Deferred revenue arising out of acquisitions | 1 |
Deferral of revenue billed in current period, net of recognition | 386 |
Revenue recognized that was deferred as of the beginning of the period | (274 | )
Balance at October 31, 2019 | $ | 510 |

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- Definition Tabular disclosure of contract balances and changes in contract balances. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130551-203045 + Details
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