v3.22.2.2
SEGMENT INFORMATION - Segment Financial Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2020
Segment Reporting Information [Line Items]      
Net sales $ 3,924.1 $ 4,925.0 $ 4,131.6
Intangible asset amortization (37.1) (30.9) (32.5)
Impairment, restructuring and other (693.1) (4.3) (0.8)
Equity in income (loss) of unconsolidated affiliates (12.9) 14.4 0.0
Interest expense (118.1) (78.9) (79.6)
Other non-operating income, net 6.9 18.6 20.1
Depreciation and amortization 105.2 93.8 94.7
Capital expenditures 113.5 106.9 62.7
Assets 4,296.8 4,800.0  
Corporate      
Segment Reporting Information [Line Items]      
Depreciation and amortization 7.6 7.9 7.5
Assets 583.8 814.5  
U.S. Consumer      
Segment Reporting Information [Line Items]      
Net sales 2,928.8 3,197.7 2,883.5
Depreciation and amortization 55.8 48.6 48.0
Capital expenditures 97.4 78.3 52.3
U.S. Consumer | Operating Segments      
Segment Reporting Information [Line Items]      
Assets 2,454.4 2,333.1  
Hawthorne      
Segment Reporting Information [Line Items]      
Net sales 716.2 1,424.2 1,023.1
Depreciation and amortization 34.8 30.3 31.7
Capital expenditures 12.4 25.0 7.8
Hawthorne | Operating Segments      
Segment Reporting Information [Line Items]      
Assets 1,061.5 1,442.8  
Other      
Segment Reporting Information [Line Items]      
Net sales 279.1 303.1 225.0
Depreciation and amortization 7.0 7.0 7.5
Capital expenditures 3.7 3.6 2.6
Other | Operating Segments      
Segment Reporting Information [Line Items]      
Assets 197.1 209.6  
Continuing Operations      
Segment Reporting Information [Line Items]      
Income from continuing operations before income taxes (558.1) 677.1 510.6
Intangible asset amortization (37.1) (30.9) (32.5)
Impairment, restructuring and other (852.2) (29.0) (16.8)
Equity in income (loss) of unconsolidated affiliates (12.9) 14.4 0.0
Costs related to refinancing 0.0 0.0 (15.1)
Interest expense (118.1) (78.9) (79.6)
Other non-operating income, net 6.9 18.6 20.1
Continuing Operations | Operating Segments      
Segment Reporting Information [Line Items]      
Income from continuing operations before income taxes 567.7 932.6 817.9
Continuing Operations | Corporate      
Segment Reporting Information [Line Items]      
Income from continuing operations before income taxes (112.4) (149.7) (183.4)
Continuing Operations | U.S. Consumer | Operating Segments      
Segment Reporting Information [Line Items]      
Income from continuing operations before income taxes 568.6 726.7 694.3
Continuing Operations | Hawthorne | Operating Segments      
Segment Reporting Information [Line Items]      
Income from continuing operations before income taxes (21.1) 163.8 111.9
Continuing Operations | Other | Operating Segments      
Segment Reporting Information [Line Items]      
Income from continuing operations before income taxes $ 20.2 $ 42.1 $ 11.7