RESTRUCTURING COSTS - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2016	Mar. 31, 2017	Mar. 31, 2016	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017	Oct. 01, 2016	Jun. 30, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 183.7
Global Integration Activities
Restructuring Cost and Reserve [Line Items]
Remaining accrual		172.3							$ 0.0
Cash expenditures		8.7
Restructuring charges		170.1
Global Integration Activities | Scenario, Forecast
Restructuring Cost and Reserve [Line Items]
Cash expenditures				$ 5.5	$ 22.5	$ 111.4	$ 32.9
Acquisition Integration Program
Restructuring Cost and Reserve [Line Items]
Remaining accrual		33.2							43.4
Cash expenditures		14.4
Pre-tax restructuring and related costs		65.0
Curtailment gain	$ 1.8
Restructuring charges		7.4
Acquisition Integration Program | Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred		61.5
Acquisition Integration Program | Scenario, Forecast
Restructuring Cost and Reserve [Line Items]
Cash expenditures				$ 1.3	$ 1.3	26.1	4.5
Organizational Redesign
Restructuring Cost and Reserve [Line Items]
Remaining accrual		10.9							34.5
Cash expenditures		27.8
Restructuring charges		6.2
Organizational Redesign | Minimum
Restructuring Cost and Reserve [Line Items]
Pre-tax restructuring and related costs		145.0
Organizational Redesign | Maximum
Restructuring Cost and Reserve [Line Items]
Pre-tax restructuring and related costs		180.0
Organizational Redesign | Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred		110.5
Organizational Redesign | Corporate | Selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred		35.3
Organizational Redesign | Scenario, Forecast
Restructuring Cost and Reserve [Line Items]
Cash expenditures						4.9	6.0
Other Restructuring, Integrate Supply Chain and Selling Activities
Restructuring Cost and Reserve [Line Items]
Remaining accrual		4.5							$ 6.2
Restructuring charges		0.6	$ 4.3
Other Restructuring, Integrate Supply Chain and Selling Activities | Scenario, Forecast
Restructuring Cost and Reserve [Line Items]
Cash expenditures						1.3	3.2
Other Restructuring Programs, Assumed Proctor and Gamble Restructuring
Restructuring Cost and Reserve [Line Items]
Remaining accrual		$ 7.1
Restructuring costs incurred								$ 8.8
Other Restructuring Programs, Assumed Proctor and Gamble Restructuring | Scenario, Forecast
Restructuring Cost and Reserve [Line Items]
Cash expenditures						$ 2.2	$ 4.9