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IMPAIRMENT, RESTRUCTURING AND OTHER - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 02, 2021	Jan. 01, 2022
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, long-term		$ 0.6
COVID-19 related costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments	$ 9.3
COVID-19 related costs | Cost of sales—impairment, restructuring and other | Hawthorne
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments	0.4
COVID-19 related costs | Cost of sales—impairment, restructuring and other | U.S. Consumer
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments	8.3
COVID-19 related costs | Restructuring, settlement and impairment provisions | U.S. Consumer
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments	$ 0.6

X

- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 45
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-Publisher FASB
-Name Accounting Standards Codification
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-Section S99
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+ References

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- Definition

Carrying amount as of the balance sheet date of known and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid after one year or beyond the next operating cycle, if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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