OTHER NON-CURRENT ASSETS - Schedule of Other Non-Current Assets (Details) - USD ($) $ in Millions	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Long-term investments	$ 299.2	$ 271.1
ROU assets	176.1	186.2
Contract assets	137.5	125.3	$ 109.1
Deferred sales commissions costs	131.7	131.2
Long-term broker fees	24.3	34.9
Deferred data center costs	$ 8.3	$ 11.8
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Total	Total
Other	$ 50.9	$ 110.1
Total	827.9	870.6
Derivative asset	$ 0.0	$ 59.9