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GOODWILL AND INTANGIBLE ASSETS - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 01, 2023	Jul. 02, 2022	Jul. 01, 2023	Jul. 02, 2022	Sep. 30, 2022
Goodwill [Line Items]
Goodwill	$ 254.5	$ 254.7	$ 254.5	$ 254.7	$ 254.0
Tradenames
Goodwill [Line Items]
Asset impairment charges		69.0		69.0
Customer accounts
Goodwill [Line Items]
Asset impairment charges		41.0		41.0
Hawthorne
Goodwill [Line Items]
Restructuring charges and adjustments			207.9
Goodwill		0.0		0.0
Cost of sales—impairment, restructuring and other | Hawthorne
Goodwill [Line Items]
Restructuring charges and adjustments	$ 25.7	10.4	$ 152.6	15.6
Goodwill Impairment | Hawthorne
Goodwill [Line Items]
Restructuring charges and adjustments		$ 522.4		$ 522.4

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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