CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) BY COMPONENT - Summary of Components of AOCI (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ 2,168.2	$ 2,240.6	$ 1,919.1
Other comprehensive income (loss) before reclassifications	57.6	(48.0)	(59.3)
Amounts reclassified from accumulated other comprehensive income/(loss)	1.2	1.1	0.9
Ending balance	2,655.1	2,168.2	2,240.6
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(320.3)	(273.6)	(214.1)
Other comprehensive income (loss) before reclassifications	56.7	(46.8)	(59.4)
Amounts reclassified from accumulated other comprehensive income/(loss)	0.0	0.0	0.0
Ending balance	(263.6)	(320.3)	(273.6)
Pension and Post- Retirement Liabilities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(5.7)	(4.6)	(4.8)
Other comprehensive income (loss) before reclassifications	0.9	(1.3)	0.1
Amounts reclassified from accumulated other comprehensive income/(loss)	0.4	0.2	0.1
Ending balance	(4.4)	(5.7)	(4.6)
Cash Flow Hedge
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(5.7)	(6.5)	(7.4)
Other comprehensive income (loss) before reclassifications	0.0	0.0	0.0
Amounts reclassified from accumulated other comprehensive income/(loss)	0.8	0.8	0.8
Ending balance	(4.9)	(5.7)	(6.5)
AOCI Attributable to Parent
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(331.7)	(284.7)	(226.3)
Ending balance	$ (272.9)	$ (331.7)	$ (284.7)