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NEW ACCOUNTING PRONOUNCEMENTS Effect of ASU 2016-15 adoption - Adjustments in Cash flow (Details) - USD ($) $ in Millions | 6 Months Ended
--- | ---
Apr. 30, 2019 | Apr. 30, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Net cash provided by operating activities | $ 461 | $ 282
Net cash used in investing activities | (49) | (46)
Net cash used in financing activities | $ (54) | (274)
As originally reported |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Net cash provided by operating activities |  | 282
Net cash used in investing activities |  | (49)
Net cash used in financing activities |  | (271)
Change | Accounting Standards Update 2016-15 [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Net cash provided by operating activities |  | 0
Net cash used in investing activities |  | 3
Net cash used in financing activities |  | $ (3)

X
- Definition Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3521-108585 + Details
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- Definition Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3521-108585 + Details
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