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SEGMENT INFORMATION - Concentrations of Credit Risk (Details) - Customer Concentration Risk | 12 Months Ended
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Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021
Net Sales | Home Depot |  |  |
Revenue, Major Customer [Line Items] |  |  |
Concentration risk (percent) | 29.00% | 28.00% | 24.00%
Net Sales | Lowe's |  |  |
Revenue, Major Customer [Line Items] |  |  |
Concentration risk (percent) | 18.00% | 15.00% | 15.00%
Net Accounts Receivable | Two Largest Customers |  |  |
Revenue, Major Customer [Line Items] |  |  |
Concentration risk (percent) | 41.00% | 46.00% |

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