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PENSION AND OTHER POSTRETIREMENT PLANS - Narrative (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Oct. 31, 2022 | Dec. 31, 2022 | Dec. 31, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2020
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Employer contributions |  |  | $ 35,706 |  |  |
Benefit payments |  |  | 185,958 |  |  |
Settlement |  |  | $ 56,274 |  |  |
Non-cash charge (in excess of) |  |  |  | $ 30,856 | $ 0 | $ 0
Contribution plan expense |  |  |  | 12,442 | 9,186 | 8,692
Forecast |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Non-cash charge (in excess of) |  | $ 1,271 |  |  |  |
Subsequent Event |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Benefit payments | $ 24,242 |  |  |  |  |
Pension |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Employer contributions |  |  |  | 36,882 | 16,259 |
Benefit payments |  |  |  | 3,362 | 13,838 |
Settlement |  |  |  | 242,232 | 0 |
Non-cash charge (in excess of) |  |  |  | 30,856 | 0 | 0
Accumulated benefit obligation |  |  |  | 36,609 | 293,926 |
Projected benefit obligation |  |  |  | 36,609 | 293,926 |
Other Postretirement |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Employer contributions |  |  |  | 615 | 507 |
Benefit payments |  |  |  | 615 | 507 |
Settlement |  |  |  | 0 | 0 |
Non-cash charge (in excess of) |  |  |  | $ 0 | $ 0 | $ 0
Per capita cost of health care benefits assumed for next fiscal year (as a percent) |  |  |  | 7.50% |  |
Ultimate health care cost trend rate (as a percent) |  |  |  | 4.00% |  |

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