GOODWILL AND INTANGIBLE ASSETS, NET - Schedule of Intangible Assets at Cost and Accumulated Amortization (Details) - USD ($) $ in Millions	Jun. 30, 2025	Jun. 30, 2024
Finite-Lived Intangible Assets [Line Items]
Original Cost	$ 2,766.9	$ 2,649.2
Accumulated Amortization	(1,489.5)	(1,342.0)
Intangible Assets, net	1,277.4	1,307.2
Software licenses
Finite-Lived Intangible Assets [Line Items]
Original Cost	250.7	233.9
Accumulated Amortization	(178.3)	(168.5)
Intangible Assets, net	72.4	65.3
Acquired software technology
Finite-Lived Intangible Assets [Line Items]
Original Cost	376.5	295.0
Accumulated Amortization	(209.4)	(215.3)
Intangible Assets, net	167.1	79.7
Customer contracts and lists
Finite-Lived Intangible Assets [Line Items]
Original Cost	1,129.8	1,140.4
Accumulated Amortization	(802.5)	(698.0)
Intangible Assets, net	327.4	442.4
Acquired intellectual property
Finite-Lived Intangible Assets [Line Items]
Original Cost	136.6	136.6
Accumulated Amortization	(136.6)	(136.6)
Intangible Assets, net	0.0	0.0
Internal use software
Finite-Lived Intangible Assets [Line Items]
Original Cost	853.1	823.1
Accumulated Amortization	(142.5)	(103.3)
Intangible Assets, net	710.6	719.8
Other intangibles
Finite-Lived Intangible Assets [Line Items]
Original Cost	20.2	20.2
Accumulated Amortization	(20.2)	(20.2)
Intangible Assets, net	$ 0.0	$ 0.1