SEGMENT REPORTING (Schedule of Geographical Information) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from external customers	$ 650.6	$ 647.2	$ 639.1	$ 641.1	$ 657.3	$ 649.0	$ 653.1	$ 643.1	$ 2,578.0	$ 2,602.5	$ 2,220.3
Long-lived assets	7,142.8				6,852.9				7,142.8	6,852.9
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from external customers									2,047.1	2,015.9	1,630.5
Long-lived assets	6,154.6				5,914.7				6,154.6	5,914.7
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from external customers									206.2	199.4	176.5
Long-lived assets	591.6				555.1				591.6	555.1
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from external customers									321.4	384.2	412.0
Long-lived assets	396.1				382.5				396.1	382.5
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from external customers									3.3	3.0	$ 1.3
Long-lived assets	$ 0.5				$ 0.6				$ 0.5	$ 0.6