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RESTRUCTURING CHARGES - Narrative (Details) $ in Thousands, ft² in Millions | 12 Months Ended | 17 Months Ended
--- | --- | ---
Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) ft² position manufacturing_site wood_mill
Restructuring Cost and Reserve [Line Items] |  |  |  |
Assets held for sale | $ 5,609 | $ 14,532 |  | $ 14,532
Restructuring charges |  | 41,309 | $ 92,468 |
Payments for restructuring | 8,955 | 24,206 | 14,528 |
Non-cash charges |  | 23,763 | 58,932 |
Personnel related costs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges |  | 5,856 | 16,772 |
Payments for restructuring | 5,355 | 11,781 | 3,051 |
Non-cash charges |  | 0 | 0 |
Facilities, exit costs and other |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges |  | 11,690 | 16,764 |
Payments for restructuring | 3,600 | 12,425 | 11,477 |
Non-cash charges |  | 0 | 0 |
Consumer and Professional Products |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges |  | 41,309 | 92,468 |
Payments for restructuring |  | 17,546 | 33,536 |
Non-cash charges |  | 23,763 | 58,932 |
Impairment of inventory |  | 23,763 | 37,100 |
Impairment of machinery and equipment |  |  | 21,832 |
Consumer and Professional Products | Personnel related costs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Payments for restructuring |  | 5,856 | 16,772 |
Consumer and Professional Products | Facilities, exit costs and other |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Payments for restructuring |  | 11,690 | 16,764 |
Global Sourcing Strategy Expansion |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Proceeds from sale of real estate and equipment | $ 17,729 |  |  |
Global Sourcing Strategy Expansion | Capital Investments |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Payments to acquire productive assets |  |  |  | $ 2,678
Global Sourcing Strategy Expansion | Consumer and Professional Products |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Number of manufacturing sites closed | manufacturing_site |  |  |  | 4
Number of impacted wood mills | wood_mill |  |  |  | 4
Restructuring and related cost, facility closing, area | ft² |  |  |  | 1.2
Restructuring and related cost, facility closing, percentage |  |  |  | 15.00%
Number of headcount reduced | position |  |  |  | 600
Restructuring charges |  |  |  | $ 133,777
Payments for restructuring |  |  |  | 51,082
Non-cash charges |  |  |  | $ 82,695
Proceeds from sale of real estate and equipment |  | $ 13,271 | $ 8,900 |

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