GOODWILL AND RADIO BROADCASTING LICENSES (Details) - Radio Broadcasting Licenses [Member] - USD ($) $ in Millions		Jun. 30, 2018	Jun. 30, 2017
Schedule of GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS [Line Items]
Pre-tax impairment charge	[1]	$ 0.0	$ 12.8
Discount Rate	[1]	9.00%	9.00%
Year 1 Market Revenue Growth Rate Range	[1]	0.50%
Maximum [Member]
Schedule of GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS [Line Items]
Year 1 Market Revenue Growth Rate Range	[1]		2.00%
Long-term Market Revenue Growth Rate Range (Years 6 – 10)	[1]	1.50%	1.50%
Mature Market Share Range	[1]	15.30%	15.30%
Operating Profit Margin Range	[1]	35.10%	47.00%
Minimum [Member]
Schedule of GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS [Line Items]
Year 1 Market Revenue Growth Rate Range	[1]		1.00%
Long-term Market Revenue Growth Rate Range (Years 6 – 10)	[1]	0.50%	0.50%
Mature Market Share Range	[1]	6.80%	6.90%
Operating Profit Margin Range	[1]	30.10%	31.60%

[1] Reflects changes only to the key assumptions used in the interim testing for certain units of accounting.