v3.22.2.2
ACQUISITIONS AND INVESTMENTS - True Liberty Bags (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 23, 2021
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2020
Business Acquisition [Line Items]        
Goodwill   $ 254.0 $ 605.2 $ 544.1
Minimum        
Business Acquisition [Line Items]        
Intangible assets amortization period   3 years    
Hawthorne        
Business Acquisition [Line Items]        
Goodwill   $ 0.0 $ 350.2 $ 305.5
True Liberty Bags | Hawthorne        
Business Acquisition [Line Items]        
Total consideration transferred $ 10.1      
Inventory and accounts receivable acquired 1.1      
Finite-lived intangible assets acquired 5.8      
Goodwill $ 3.2      
True Liberty Bags | Hawthorne | Minimum        
Business Acquisition [Line Items]        
Intangible assets amortization period 15 years