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v3.23.2

Borrowings - Debt Redemption (Details) - Senior Notes | 9 Months Ended |  |  |
--- | --- | --- | --- | ---
Jun. 30, 2023 | Sep. 30, 2019 | Oct. 31, 2017 | Mar. 31, 2017
6.750% |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate on debt instrument | 6.75% |  |  | 6.75%
6.750% | Debt Instrument, Redemption, Period One |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Redemption price percentage | 100.00% |  |  |
6.750% | Debt Instrument, Redemption, Period Two |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Redemption price percentage | 105.063% |  |  |
6.750% | Debt Instrument, Redemption, Period Three |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Redemption price percentage | 103.375% |  |  |
6.750% | Debt Instrument, Redemption, Period Four |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Redemption price percentage | 101.688% |  |  |
6.750% | Debt Instrument, Redemption, Period Five |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Redemption price percentage | 100.00% |  |  |
5.875% |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate on debt instrument | 5.875% |  | 5.875% |
5.875% | Debt Instrument, Redemption, Period One |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Redemption price percentage | 100.00% |  |  |
5.875% | Debt Instrument, Redemption, Period Two |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Redemption price percentage | 102.938% |  |  |
5.875% | Debt Instrument, Redemption, Period Three |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Redemption price percentage | 101.958% |  |  |
5.875% | Debt Instrument, Redemption, Period Four |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Redemption price percentage | 100.979% |  |  |
5.875% | Debt Instrument, Redemption, Period Five |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Redemption price percentage | 100.00% |  |  |
7.250% |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate on debt instrument | 7.25% | 7.25% |  |
7.250% | Debt Instrument, Redemption, Period One |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Redemption price percentage | 100.00% |  |  |
7.250% | Debt Instrument, Redemption, Period Two |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Redemption price percentage | 103.625% |  |  |
7.250% | Debt Instrument, Redemption, Period Three |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Redemption price percentage | 102.417% |  |  |
7.250% | Debt Instrument, Redemption, Period Four |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Redemption price percentage | 101.208% |  |  |
7.250% | Debt Instrument, Redemption, Period Five |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Redemption price percentage | 100.00% |  |  |

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