STOCK-BASED COMPENSATION - Compensation Expense (Details) - USD ($) $ in Millions	12 Months Ended
Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021
Stock-based compensation expense
Stock-based compensation expense before income taxes	$ 317.8	$ 183.0	$ 110.5
Income tax provision/(benefit)	(45.8)	(35.4)	(21.7)
Stock-based compensation expense, net of income tax benefit	272.0	147.6	88.8
Capitalized stock-based compensation expense	74.4	82.1	30.1
Cost of revenue
Stock-based compensation expense
Stock-based compensation expense before income taxes	(9.5)	48.4	8.7
Selling and marketing
Stock-based compensation expense
Stock-based compensation expense before income taxes	95.2	30.0	18.3
General and administrative
Stock-based compensation expense
Stock-based compensation expense before income taxes	115.5	66.5	56.9
Research and development
Stock-based compensation expense
Stock-based compensation expense before income taxes	$ 116.6	$ 38.1	$ 26.6

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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