GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Schedule of intangible assets subject to amortization (Details) - USD ($) $ in Millions	Mar. 31, 2025	Mar. 21, 2025	Jun. 30, 2024
Finite-Lived Intangible Assets [Line Items]
Cost	$ 4,709.8		$ 4,852.3
Accumulated Amortization	(2,321.7)		(2,205.7)
Accumulated Impairment	(25.6)		(25.6)
Net	2,362.5		2,621.0
License agreements and collaboration agreements
Finite-Lived Intangible Assets [Line Items]
Cost	3,569.9	$ 142.5	3,715.1
Accumulated Amortization	(1,508.4)		(1,422.5)
Accumulated Impairment	(19.6)		(19.6)
Net	2,041.9		2,273.0
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Cost	743.5		741.8
Accumulated Amortization	(547.6)		(527.8)
Accumulated Impairment	(5.5)		(5.5)
Net	190.4		208.5
Trademarks
Finite-Lived Intangible Assets [Line Items]
Cost	312.6		311.7
Accumulated Amortization	(202.1)		(192.4)
Accumulated Impairment	(0.5)		(0.5)
Net	110.0		118.8
Product formulations and technology
Finite-Lived Intangible Assets [Line Items]
Cost	83.8		83.7
Accumulated Amortization	(63.6)		(63.0)
Accumulated Impairment	0.0		0.0
Net	$ 20.2		$ 20.7