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RESTRUCTURING CHARGES (Details 2) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 99 Months Ended
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2023
Mar. 31, 2023
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Dec. 31, 2023
Dec. 31, 2022
Restructuring Cost and Reserve [Line Items]                  
Accrued restructuring costs $ 16.2   $ 49.7   $ 16.2 $ 49.7 $ 16.2 $ 27.5 $ 13.6
Restructuring charges 6.8 $ 8.3 19.2 $ 60.9 15.1 80.1 208.3    
Amounts utilized         (26.4) (44.0)      
Employee severance and related benefit costs                  
Restructuring Cost and Reserve [Line Items]                  
Accrued restructuring costs 3.4   11.3   3.4 11.3 3.4 10.8 9.4
Restructuring charges 0.0 0.0 3.3 0.0     17.9    
Amounts utilized         (7.4) (1.4)      
Lease and other contract termination costs                  
Restructuring Cost and Reserve [Line Items]                  
Accrued restructuring costs 12.8   38.4   12.8 38.4 12.8 16.7 4.2
Restructuring charges 1.7 0.0 1.7 39.7     37.2    
Amounts utilized         (5.6) (7.2)      
Facility exit costs                  
Restructuring Cost and Reserve [Line Items]                  
Accrued restructuring costs 0.0   0.0   0.0 0.0 0.0 0.0 0.0
Restructuring charges 5.1 8.3 9.3 8.4     73.3    
Amounts utilized         (13.4) (17.7)      
Write-off of equipment and facility                  
Restructuring Cost and Reserve [Line Items]                  
Accrued restructuring costs 0.0   0.0   0.0 0.0 0.0 $ 0.0 $ 0.0
Restructuring charges $ 0.0 $ 0.0 $ 4.9 $ 12.8     $ 79.9    
Amounts utilized         $ 0.0 $ (17.7)