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IMPAIRMENT, RESTRUCTURING AND OTHER - Additional Information (Details) $ in Millions	3 Months Ended			6 Months Ended	9 Months Ended
	Jul. 01, 2023 USD ($)	Apr. 01, 2023 distributionCenter	Jul. 02, 2022 USD ($)	Apr. 01, 2023 USD ($)	Jul. 01, 2023 USD ($)	Jul. 02, 2022 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, long-term	$ 8.5				$ 8.5
Number of distribution centers closed | distributionCenter		4
Employee Severance and Impairment Of Property, Plant, And Equipment
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments			$ 40.7			$ 46.1
Restructuring Initiative
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments	34.5				185.8
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Hurricane Brand
Restructuring Cost and Reserve [Line Items]
Proceeds from Divestiture of Businesses				$ 5.0
U.S. Consumer
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments					30.0
Hawthorne
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments					207.9
Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments					0.9
Corporate Segment | Restructuring Initiative
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments					12.2
Cost of sales—impairment, restructuring and other
Restructuring Cost and Reserve [Line Items]
Inventory Write-down			45.9			45.9
Cost of sales—impairment, restructuring and other | U.S. Consumer
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments	7.1		9.5		8.2	9.5
Cost of sales—impairment, restructuring and other | Hawthorne
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments	25.7		10.4		152.6	15.6
Impairment, Restructuring, And Other | U.S. Consumer
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments	0.0		7.4		0.1	7.4
Impairment, Restructuring, And Other | Hawthorne
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments	1.9		7.1		20.1	7.1
Goodwill and intangible asset impairments			632.4			632.4
Impairment, Restructuring, And Other | Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments	0.0				0.2
Impairment, Restructuring, And Other | Corporate Segment
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments	$ 0.0		6.3		$ 4.5	6.3
Goodwill Impairment | Hawthorne
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments			522.4			522.4
Finite-lived intangible asset impairment | Hawthorne
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments			$ 110.0			$ 110.0

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