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FIXED ASSETS, NET (Details) - USD ($) $ in Millions	12 Months Ended
FIXED ASSETS, NET (Details) - USD ($) $ in Millions	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Fixed assets
Fixed assets, gross	$ 954.9	$ 777.6
Less: accumulated depreciation	(511.1)	(366.5)
Fixed assets, net	443.8	411.1
Depreciation expense	153.9	135.5	$ 90.3
Computer equipment
Fixed assets
Fixed assets, gross	365.0	298.2
Leasehold improvements
Fixed assets
Fixed assets, gross	313.2	270.6
Computer software
Fixed assets
Fixed assets, gross	147.5	89.0
Buildings
Fixed assets
Fixed assets, gross	65.1	63.7
Furniture and fixtures
Fixed assets
Fixed assets, gross	43.4	35.5
Office equipment
Fixed assets
Fixed assets, gross	20.7	20.6
Fixed assets, net
Fixed assets
Depreciation expense	$ 153.9	$ 135.5	$ 88.8