RESTRUCTURING CHARGES - Narrative (Details) $ in Thousands, ft² in Millions	12 Months Ended			17 Months Ended
	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2024 USD ($) ft² position wood_mill manufacturing_site
Restructuring Cost and Reserve [Line Items]
Assets held for sale	$ 14,532	$ 0		$ 14,532
Restructuring charges	41,309	92,468	$ 16,782
Payments for restructuring	24,206	14,528	11,983
Non-cash charges	23,763	58,932	4,831
Consumer and Professional Products
Restructuring Cost and Reserve [Line Items]
Restructuring charges	41,309	92,468	16,782
Payments for restructuring	17,546	33,536	11,951
Non-cash charges	23,763	58,932	4,831
Impairment of machinery and equipment		21,832
Impairment of inventory	23,763	37,100	3,805
Consumer and Professional Products | Global Sourcing Strategy Expansion
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
Consumer and Professional Products | Discontinued Operations, Held-for-sale | Global Sourcing Strategy Expansion
Restructuring Cost and Reserve [Line Items]
Assets held for sale	14,532			14,532
Capital Investments | Consumer and Professional Products | Global Sourcing Strategy Expansion
Restructuring Cost and Reserve [Line Items]
Payments to acquire productive assets				$ 2,678
Personnel related costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	5,856	16,772	4,124
Payments for restructuring	11,781	3,051	4,156
Non-cash charges	0	0	0
Personnel related costs | Consumer and Professional Products
Restructuring Cost and Reserve [Line Items]
Payments for restructuring	5,856	16,772	4,124
Facilities, exit costs and other
Restructuring Cost and Reserve [Line Items]
Restructuring charges	11,690	16,764	7,827
Payments for restructuring	12,425	11,477	7,827
Non-cash charges	0	0	0
Facilities, exit costs and other | Consumer and Professional Products
Restructuring Cost and Reserve [Line Items]
Payments for restructuring	11,690	16,764	7,827
Non-cash facility, disposal of fixed assets | Consumer and Professional Products
Restructuring Cost and Reserve [Line Items]
Non-cash charges			1,026
Non-cash facility and other
Restructuring Cost and Reserve [Line Items]
Restructuring charges	23,763	58,932	4,831
Payments for restructuring	0	0	0
Non-cash charges	$ 23,763	$ 58,932	$ 4,831