EQUITY AND CONVERTIBLE PREFERRED STOCK - Accumulated Other Comprehensive Income (Loss) (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	$ 4,011.7	$ 3,997.4	$ 3,345.8
Total other comprehensive income (loss), net of tax	61.8	(132.7)	55.9
Ending balance	3,719.0	4,011.7	3,997.4
Total
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(795.1)	(662.4)	(717.9)
Other comprehensive income (loss) before reclassifications	67.9	(127.6)
Net amounts reclassified from AOCI/(L)	(6.2)	(5.1)
Total other comprehensive income (loss), net of tax	61.7	(132.7)
Ending balance	(733.4)	(795.1)	(662.4)
(Losses) Gains on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	2.1	0.7
Other comprehensive income (loss) before reclassifications	(0.8)	1.2
Net amounts reclassified from AOCI/(L)	(2.4)	0.2
Total other comprehensive income (loss), net of tax	(3.2)	1.4
Ending balance	(1.1)	2.1	0.7
(Losses) Gains on Net Investment Hedge
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(23.0)	(49.8)
Other comprehensive income (loss) before reclassifications	(181.8)	26.8
Net amounts reclassified from AOCI/(L)	0.0	0.0
Total other comprehensive income (loss), net of tax	(181.8)	26.8
Ending balance	(204.8)	(23.0)	(49.8)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(823.0)	(667.9)
Other comprehensive income (loss) before reclassifications	240.3	(155.1)
Net amounts reclassified from AOCI/(L)	0.0	0.0
Total other comprehensive income (loss), net of tax	240.3	(155.1)
Ending balance	(582.7)	(823.0)	(667.9)
Pension and Other Post-Employment Benefit Plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	48.8	54.6
Other comprehensive income (loss) before reclassifications	10.2	(0.5)
Net amounts reclassified from AOCI/(L)	(3.8)	(5.3)
Total other comprehensive income (loss), net of tax	6.4	(5.8)
Ending balance	55.2	48.8	$ 54.6
Amortization of actuarial losses
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Net amounts reclassified from AOCI/(L)	5.0	7.1
Amortization of actuarial gains (losses), tax	$ 1.2	$ 1.8