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ACQUISITIONS AND INVESTMENTS - Luxx Lighting (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	Jul. 02, 2022	Dec. 30, 2021	Sep. 30, 2021	Jul. 03, 2021
Business Acquisition [Line Items]
Common shares stated value (USD per share)	$ 0.01		$ 0.01	$ 0.01
Goodwill	$ 254.7		$ 605.2	$ 547.1
Hawthorne
Business Acquisition [Line Items]
Goodwill	0.0		$ 350.2
Hawthorne | Luxx Lighting, Inc.
Business Acquisition [Line Items]
Consideration for the acquisition		$ 213.2
Number of shares issued in acquisition		0.1
Common shares stated value (USD per share)		$ 0.01
Fair value of shares issued in acquisition		$ 21.0
Refund liabilities and warranty claims	8.9
Inventory and accounts receivable acquired		32.8
Current assets		5.7
Liabilities		24.2
Finite-lived intangible assets acquired		47.3
Goodwill		$ 151.6
Increase (decrease), finite-lived identifiable intangible assets	(59.5)
Increase (decrease) in goodwill	$ 59.5
Hawthorne | Luxx Lighting, Inc. | Minimum
Business Acquisition [Line Items]
Intangible assets amortization period		5 years
Hawthorne | Luxx Lighting, Inc. | Maximum
Business Acquisition [Line Items]
Intangible assets amortization period		25 years

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