LOSS PER SHARE - Computation of Basic and Diluted Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Computation of Basic and diluted loss per share:
Net loss	$ (125.2)	$ (91.6)	$ (752.7)	$ (841.2)
Weighted average shares outstanding—basic (in shares)	176.0	170.3	174.5	169.9
Basic loss per share (in dollars per share)	$ (0.71)	$ (0.54)	$ (4.31)	$ (4.95)
Diluted loss per share (in dollars per share)	$ (0.71)	$ (0.54)	$ (4.31)	$ (4.95)