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REPORTABLE SEGMENTS - Schedule of Disaggregation of Revenue by Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Revenue	$ 2,519,926	$ 2,623,520	$ 2,685,183
Home and Building Products
Segment Reporting Information [Line Items]
Revenue	1,584,182	1,588,625	1,588,505
Consumer and Professional Products
Segment Reporting Information [Line Items]
Revenue	$ 935,744	$ 1,034,895	$ 1,096,678

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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