v3.26.3
STOCK-BASED COMPENSATION - Stock-Based Compensation Expense (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended 27 Months Ended
Dec. 31, 2026
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2028
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]            
Stock-based compensation expense   $ 18.6 $ 14.6 $ 58.1 $ 41.2  
Performance shares | Subsequent event | Forecast            
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]            
Additional stock-based compensation expense from plan modification $ 4.0         $ 10.0
Airity Technologies            
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]            
Stock-based compensation expense   $ 0.9   $ 2.8