GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Schedule of Intangible Assets Subject to Amortization (Details) - USD ($) $ in Millions	Jun. 30, 2025	Mar. 21, 2025	Jun. 30, 2024
Finite-Lived Intangible Assets [Line Items]
Cost	$ 4,937.8		$ 4,852.3
Accumulated Amortization	(2,458.4)		(2,205.7)
Accumulated Impairment	(25.6)		(25.6)
Net	2,453.8		2,621.0
License and collaboration agreements
Finite-Lived Intangible Assets [Line Items]
Cost	3,765.8	$ 142.5	3,715.1
Accumulated Amortization	(1,614.9)		(1,422.5)
Accumulated Impairment	(19.6)		(19.6)
Net	2,131.3		2,273.0
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Cost	766.0		741.8
Accumulated Amortization	(568.9)		(527.8)
Accumulated Impairment	(5.5)		(5.5)
Net	191.6		208.5
Trademarks
Finite-Lived Intangible Assets [Line Items]
Cost	318.2		311.7
Accumulated Amortization	(208.4)		(192.4)
Accumulated Impairment	(0.5)		(0.5)
Net	109.3		118.8
Product formulations and technology
Finite-Lived Intangible Assets [Line Items]
Cost	87.8		83.7
Accumulated Amortization	(66.2)		(63.0)
Accumulated Impairment	0.0		0.0
Net	$ 21.6		$ 20.7