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IMPAIRMENT, RESTRUCTURING AND OTHER - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 30, 2024	Apr. 01, 2023	Mar. 30, 2024	Apr. 01, 2023
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, long-term	$ 9.2		$ 9.2
Restructuring Initiative
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments		$ 136.8		$ 151.4
Restructuring Initiative
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments	77.0		73.2
U.S. Consumer
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments			46.0
Hawthorne
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments			294.4
Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments			1.8
Corporate Segment | Restructuring Initiative
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments			25.1
Cost of sales—impairment, restructuring and other | U.S. Consumer
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments	(0.5)	0.2	1.4	1.2
Cost of sales—impairment, restructuring and other | Hawthorne
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments	75.4	118.5	67.8	127.0
Impairment, Restructuring, And Other | U.S. Consumer
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments	(0.1)	0.1	(0.9)	0.3
Impairment, Restructuring, And Other | Hawthorne
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments	1.9	17.1	2.3	18.2
Impairment, Restructuring, And Other | Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments	0.2		0.3
Impairment, Restructuring, And Other | Corporate Segment
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments	0.0	$ 0.8	2.4	$ 4.5
Restructuring, Settlement And Impairment Provisions
Restructuring Cost and Reserve [Line Items]
(Gain) Loss on Disposition of Property Plant Equipment	$ 0.0		$ (12.1)

X

- Definition

Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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