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LONG-TERM DEBT - Senior Notes (Details) - USD ($) $ in Millions |  | 12 Months Ended |
--- | --- | --- | ---
Oct. 22, 2020 | Jul. 31, 2021 | Oct. 31, 2020
6.750% Senior Notes Due 2029 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument, face amount |  |  | $ 500
Term Loan Facility, Term B Tranche | Secured Debt |  |  |
Debt Instrument [Line Items] |  |  |
Prepayments | $ 500 | $ 500 |
Senior Notes | 6.750% Senior Notes Due 2029 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument, face amount | $ 500 |  |
Debt instrument, interest rate, stated percentage | 6.75% |  |
Financing costs |  | $ 9 |

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