v3.25.1
ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance $ 5,667.9  
Other comprehensive income (loss) before reclassifications 8.2 $ 8.2
Ending balance 2,137.7 5,667.9
Foreign currency translation adjustments    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance (105.0) (111.7)
Other comprehensive income (loss) before reclassifications 8.2 6.7
Ending balance (96.8) (105.0)
Unrealized loss on available- for-sales securities    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance (0.1) (1.6)
Other comprehensive income (loss) before reclassifications 0.0 1.5
Ending balance (0.1) (0.1)
Total    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance (105.1) (113.3)
Ending balance $ (96.9) $ (105.1)