v3.26.1
INCOME TAXES (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 9 Months Ended
Nov. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Sep. 30, 2025
Income Tax Disclosure [Line Items]            
Nondeductible executive compensation       $ 1.0    
Income tax benefit   $ (6.4) $ (3.4) (20.2) $ (22.9)  
Income Tax Jurisdiction, Domestic Federal            
Income Tax Disclosure [Line Items]            
Additional valuation allowance   7.2   7.2    
Net operating loss carryforwards   84.2   84.2   $ 80.5
Income Tax Jurisdiction, Domestic Federal | NOL Carryforwards Expire Beginning In 2031            
Income Tax Disclosure [Line Items]            
Net operating loss carryforwards   7.3   7.3   7.1
Foreign Tax Authority            
Income Tax Disclosure [Line Items]            
Remaining settlement amount $ 24.8          
Increase in other current assets       21.4    
Decrease in other noncurrent assets       47.1    
Decrease in other noncurrent liabilities       54.0    
Foreign Tax Authority | Canadian Tax Authority            
Income Tax Disclosure [Line Items]            
Total reassessments including interest           $ 209.8
Payment for tax settlement   8.7   8.7    
Income tax benefit       3.5    
Amount of security posted in the form of cash   35.8   35.8    
Amount of security posted in the form of a performance bond   $ 157.4   $ 157.4