GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Schedule of Intangible Assets Subject to Amortization (Details) - USD ($) $ in Millions	Jan. 06, 2020	Sep. 30, 2020	Jun. 30, 2020
Finite-Lived Intangible Assets [Line Items]
Cost		$ 5,186.3	$ 5,059.2
Accumulated Amortization		(1,749.8)	(1,657.0)
Accumulated Impairment		(25.6)	(25.6)
Net		3,410.9	3,376.6
License agreement
Finite-Lived Intangible Assets [Line Items]
Cost		3,972.8	3,861.2
Accumulated Amortization		(1,080.4)	(1,021.1)
Accumulated Impairment		(19.6)	(19.6)
Net		2,872.8	2,820.5
License agreement | King Kylie
Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired	$ 649.0
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Cost		795.9	786.1
Accumulated Amortization		(453.4)	(427.3)
Accumulated Impairment		(5.5)	(5.5)
Net		337.0	353.3
Customer relationships | King Kylie
Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired	$ 27.0
Trademarks
Finite-Lived Intangible Assets [Line Items]
Cost		329.4	325.7
Accumulated Amortization		(159.8)	(154.0)
Accumulated Impairment		(0.5)	(0.5)
Net		169.1	171.2
Product formulations and technology
Finite-Lived Intangible Assets [Line Items]
Cost		88.2	86.2
Accumulated Amortization		(56.2)	(54.6)
Accumulated Impairment		0.0	0.0
Net		$ 32.0	$ 31.6