RESTRUCTURING COSTS - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015	Oct. 01, 2016
Restructuring Cost and Reserve [Line Items]
Additional restructuring charges remaining				$ 160.0
Additional other charges remaining, approval actions				90.0
Restructuring charges				387.3
Curtailment gain				2.2	$ 1.8	$ 0.6
Global Integration Activities
Restructuring Cost and Reserve [Line Items]
Restructuring accrual				328.5	0.0
Cash expenditures				35.0
Restructuring charges				369.4
Global Integration Activities | Scenario, Forecast
Restructuring Cost and Reserve [Line Items]
Cash expenditures	$ 3.4	$ 72.7	$ 252.4
Acquisition Integration Program
Restructuring Cost and Reserve [Line Items]
Restructuring accrual				30.4	43.4
Cash expenditures				17.9
Restructuring charges				5.9
Restructuring costs incurred				59.9
Curtailment gain				1.8
Acquisition Integration Program | Scenario, Forecast
Restructuring Cost and Reserve [Line Items]
Cash expenditures		0.8	29.6
Organizational Redesign
Restructuring Cost and Reserve [Line Items]
Restructuring accrual				6.2	34.5
Cash expenditures				31.5
Restructuring charges				8.3
Organizational Redesign | Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred				111.2
Organizational Redesign | Scenario, Forecast
Restructuring Cost and Reserve [Line Items]
Cash expenditures		0.1	6.1
Other Restructuring, Integrate Chain and Selling Activities
Restructuring Cost and Reserve [Line Items]
Restructuring accrual				3.9	6.2
Restructuring charges				0.6	$ 10.1	$ 1.5
Other Restructuring Programs, Assumed Proctor and Gable Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring accrual				14.3
Restructuring costs incurred							$ 21.7
Other Restructuring Programs, Assumed Proctor and Gable Restructuring | Scenario, Forecast
Restructuring Cost and Reserve [Line Items]
Cash expenditures	$ 2.0	$ 3.3	$ 9.0
Selling, general and administrative | Global Integration Activities
Restructuring Cost and Reserve [Line Items]
Restructuring charges				10.0
Selling, general and administrative | Organizational Redesign | Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred				$ 37.4