BUSINESS ACQUISITIONS - Acquisition of Innovatix and Essensa (Narrative) (Details) - USD ($)				12 Months Ended
	Jun. 24, 2017	Jan. 10, 2017	Dec. 02, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015	Dec. 01, 2016
Business Acquisition [Line Items]
Acquisition related expenses				$ 15,790,000	$ 15,804,000	$ 9,037,000
Goodwill				906,545,000	537,962,000
Receivable from GNYHA Holdings, LLC			$ 3,000,000.0
Investments in unconsolidated affiliates				92,879,000	16,800,000
Remeasurement gain				205,146,000	$ 0	$ 0
Innovatix
Business Acquisition [Line Items]
Business combination, equity interest in acquiree, percentage			50.00%				50.00%
Business acquisition, percentage of voting interests acquired			50.00%
50% ownership interest in Innovatix			$ 218,400,000
Remeasurement gain			$ 205,100,000
Essensa Ventures, LLC
Business Acquisition [Line Items]
Business acquisition, percentage of voting interests acquired			100.00%
Innovatix LLC And Essensa Ventures, LLC
Business Acquisition [Line Items]
Purchase price	$ 325,000,000		$ 325,000,000
Cash payment for acquisition		$ 97,500,000	227,500,000
Payments to acquire businesses, adjusted purchase price			335,984,000
Acquisition related expenses				6,500,000
Goodwill			334,677,000
Maximum earnout			43,000,000
Earn-out liability			16,662,000	$ 21,100,000
Receivable from GNYHA Holdings, LLC			3,000,000
50% ownership interest in Innovatix			$ 218,356,000
Innovatix
Business Acquisition [Line Items]
Investments in unconsolidated affiliates							$ 13,300,000