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DEBT Summary of Long term debt incl. unamortized cost (Details) - USD ($) $ in Millions	Oct. 31, 2020	Oct. 31, 2019
Debt Instrument [Line Items]
Long-term Debt	$ 1,789	$ 1,788
4.55% Senior Notes 2024
Debt Instrument [Line Items]
Senior Notes	598	597
Senior notes, Unamortized Discount (Premium) and Debt Issuance Costs, Net	2	3
4.60% Senior Notes 2027
Debt Instrument [Line Items]
Senior Notes	695	695
Senior notes, Unamortized Discount (Premium) and Debt Issuance Costs, Net	5	5
3.00% Senior Notes 2029
Debt Instrument [Line Items]
Senior Notes	496	496
Senior notes, Unamortized Discount (Premium) and Debt Issuance Costs, Net	$ 4	$ 4

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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)
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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ 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)(3)
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Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

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