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DEBT Long Term and Short Term Debt (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Oct. 31, 2020 | Oct. 31, 2019 | Oct. 31, 2018
Debt Instrument [Line Items] |  |  |
Repayments of Debt | $ 7 | $ 500 | $ 300
Long-term Debt | 1,789 | 1,788 |
Long-term Debt, Excluding Current Maturities | 1,789 | $ 1,788 |
3.00% Senior Notes 2029 |  |  |
Debt Instrument [Line Items] |  |  |
Debt Issuance Costs, Gross | $ 4 |  |
Issuance date of debt | Oct. 31, 2019 |  |
Debt Instrument, Face Amount | $ 500 |  |
Percentage Of Face Amount Of Debt Instrument Issued | 99.914% |  |
Maturity date | Oct. 30, 2029 |  |
Debt Instrument, Interest Rate, Stated Percentage | 3.00% |  |
Debt Instrument, Frequency of Periodic Payment | semi-annually |  |
4.55% Senior Notes 2024 |  |  |
Debt Instrument [Line Items] |  |  |
Debt Issuance Costs, Gross | $ 5 |  |
Issuance date of debt | Oct. 31, 2014 |  |
Debt Instrument, Face Amount | $ 600 |  |
Percentage Of Face Amount Of Debt Instrument Issued | 99.966% |  |
Maturity date | Oct. 30, 2024 |  |
Debt Instrument, Interest Rate, Stated Percentage | 4.55% |  |
Debt Instrument, Frequency of Periodic Payment | semi-annually |  |
4.60% Senior Notes 2027 |  |  |
Debt Instrument [Line Items] |  |  |
Debt Issuance Costs, Gross | $ 6 |  |
Issuance date of debt | Apr. 30, 2017 |  |
Debt Instrument, Face Amount | $ 700 |  |
Percentage Of Face Amount Of Debt Instrument Issued | 99.873% |  |
Maturity date | Apr. 06, 2027 |  |
Debt Instrument, Interest Rate, Stated Percentage | 4.60% |  |
Debt Instrument, Frequency of Periodic Payment | semi-annually |  |

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