INCOME TAXES (Reconciliation of Income Tax Provision) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Dec. 22, 2017	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
INCOME TAXES
Applicable statutory rate	35.00%	21.00%	28.00%	21.00%	28.00%
Expected expense at the statutory rate		$ 11.1	$ 12.4	$ 31.1	$ 29.8
Stock-based compensation		1.7	1.6	5.3	4.1
State income taxes benefit, net of federal benefit		2.0	1.3	6.0	2.8
Non-deductible transaction costs		0.3	0.4	0.7	0.6
Change in statutory tax rates outside U.S.				(0.1)	0.8
Changes in uncertain tax positions		1.8		8.2
Foreign tax rate differential		1.4	(1.0)	2.9	(2.7)
U.S. Tax Reform			4.6	7.2	48.7
Change in valuation allowance		(1.5)	(0.2)	(2.3)	(31.6)
Other, net		1.2	1.9	2.0	(5.7)
Provision for income taxes		$ 18.0	$ 21.0	$ 61.0	$ 46.8