SHORT-TERM INVESTMENTS - Short-term Investments (Details) - USD ($) $ in Millions	Sep. 30, 2025	Mar. 31, 2025
Debt Securities, Available-for-sale [Line Items]
Cost or Amortized Cost	$ 246.4	$ 9.4
Gross Unrealized, Gains	0.0	0.0
Gross Unrealized, Losses	0.0	0.0
Fair Value	246.4	9.4
Bank time deposits
Debt Securities, Available-for-sale [Line Items]
Cost or Amortized Cost	246.4	9.4
Gross Unrealized, Gains	0.0	0.0
Gross Unrealized, Losses	0.0	0.0
Fair Value	$ 246.4	$ 9.4