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DEBT Long Term Debt (Details) - USD ($) $ in Millions | Jan. 31, 2020 | Oct. 31, 2019
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Debt Instrument |  |
Total debt | $ 1,788 | $ 1,788
Senior Notes 2024 |  |
Debt Instrument |  |
Total debt | 597 | 597
Unamortized costs | 3 | 3
Senior Notes 2027 |  |
Debt Instrument |  |
Total debt | 695 | 695
Unamortized costs | 5 | 5
Senior Notes 2029 [Member] |  |
Debt Instrument |  |
Total debt | 496 | 496
Unamortized costs | $ 4 | $ 4

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- Definition Amount of unamortized debt discount (premium) and debt issuance costs. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399 + Details
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