SHARE-BASED COMPENSATION PLANS - Schedule of share-based compensation (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	$ 18.4	$ 23.3	$ 35.4	$ 53.0
Equity plan expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	15.2	19.9	32.1	50.1
Liability plan (income) expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	0.3	0.3	0.4	(0.2)
Fringe expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	$ 2.9	$ 3.1	$ 2.9	$ 3.1