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EMPLOYEE BENEFIT PLANS - MIX AND TARGETED ALLOCATION (Details) | Sep. 30, 2020 | Sep. 30, 2019
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Defined Benefit Plan Disclosure [Line Items] |  |
Target Allocation | 100.00% |
Assets | 100.00% | 100.00%
U.S. equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target Allocation | 34.00% |
Assets | 38.00% | 37.00%
International equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target Allocation | 17.00% |
Assets | 18.00% | 17.00%
Fixed income |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target Allocation | 38.00% |
Assets | 39.00% | 42.00%
Other assets |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target Allocation | 11.00% |
Assets | 5.00% | 4.00%

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