v3.26.1
ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance $ 2,137.7  
Other comprehensive loss before reclassifications 29.6 $ 8.2
Ending balance 3,510.9 2,137.7
Foreign currency translation adjustments    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance (96.8) (105.0)
Other comprehensive loss before reclassifications 29.6 8.2
Ending balance (67.2) (96.8)
Unrealized (loss) gain on available-for- sales securities    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance (0.1) (0.1)
Other comprehensive loss before reclassifications 0.0 0.0
Ending balance (0.1) (0.1)
Total    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance (96.9) (105.1)
Ending balance $ (67.3) $ (96.9)