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LONG-TERM DEBT - Text (Details) - USD ($) $ in Millions |  |  |  |  | 9 Months Ended
--- | --- | --- | --- | --- | ---
Apr. 05, 2021 | Mar. 12, 2021 | Jan. 21, 2021 | Sep. 13, 2012 | Jul. 31, 2021 | Jul. 31, 2020
Debt Instrument |  |  |  |  |  |
Early Repayment of Senior Debt |  |  |  |  | $ 417 | $ 0
Loss on extinguishment of debt |  |  |  |  | 17 | $ 0
Senior Notes 2022 |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |
Issuance date of debt |  |  |  | Sep. 13, 2012 |  |
Aggregate face amount of debt |  |  |  | $ 400 |  |
Percentage Of Face Amount Of Senior Note Instrument Issued |  |  |  | 99.80% |  |
Maturity date of debt |  |  |  | Oct. 01, 2022 |  |
Fixed interest rate per annum |  |  |  | 3.20% |  |
Debt interest payment frequency |  |  |  | semi-annually |  |
Date interest payment commenced |  |  |  | Apr. 01, 2013 |  |
Repayments of Senior Debt | $ 300 |  | $ 100 |  |  |
Early Repayment of Senior Debt |  |  |  |  | 417 |
Loss on extinguishment of debt |  |  |  |  | 17 |
Payment of accrued and unpaid interest |  |  |  |  | $ 1 |
Senior Notes 2031 |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |
Issuance date of debt |  | Mar. 12, 2021 |  |  |  |
Aggregate face amount of debt |  | $ 850 |  |  |  |
Percentage Of Face Amount Of Senior Note Instrument Issued |  | 99.822% |  |  |  |
Maturity date of debt |  | Mar. 12, 2031 |  |  |  |
Fixed interest rate per annum |  | 2.30% |  |  |  |
Date interest payment commenced |  | Sep. 12, 2021 |  |  |  |

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