GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Schedule of Intangible Assets Subject to Amortization (Details) - USD ($) $ in Millions	Jan. 06, 2020	Jun. 30, 2020	Jun. 30, 2019
Finite-Lived Intangible Assets [Line Items]
Cost		$ 5,059.2	$ 4,770.4
Accumulated Amortization		(1,657.0)	(1,543.0)
Accumulated Impairment		(25.6)	(25.6)
Net		3,376.6	3,201.8
License and collaboration agreements
Finite-Lived Intangible Assets [Line Items]
Cost		3,861.2	3,240.2
Accumulated Amortization		(1,021.1)	(873.1)
Accumulated Impairment		(19.6)	(19.6)
Net		2,820.5	2,347.5
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Cost		786.1	978.6
Accumulated Amortization		(427.3)	(450.2)
Accumulated Impairment		(5.5)	(5.5)
Net		353.3	522.9
Customer relationships | King Kylie
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired	$ 27.0
Trademarks
Finite-Lived Intangible Assets [Line Items]
Cost		325.7	451.2
Accumulated Amortization		(154.0)	(157.8)
Accumulated Impairment		(0.5)	(0.5)
Net		171.2	292.9
Product formulations and technology
Finite-Lived Intangible Assets [Line Items]
Cost		86.2	100.4
Accumulated Amortization		(54.6)	(61.9)
Accumulated Impairment		0.0	0.0
Net		$ 31.6	$ 38.5
License agreements | King Kylie
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired	$ 649.0