GOODWILL AND RADIO BROADCASTING LICENSES (Details) - Radio Broadcasting Licenses [Member] - USD ($) $ in Millions		Sep. 30, 2016	Sep. 30, 2015
Schedule Of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]
Pre-tax impairment charge (in millions)	[1]	$ 0	$ 0
Discount Rate	[1]	9.00%	9.50%
Operating Profit Margin Range	[1]		31.70%
Minimum [Member]
Schedule Of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]
Year 1 Market Revenue Growth Rate Range	[1]	0.30%	0.30%
Long-term Market Revenue Growth Rate Range (Years 6 - 10)	[1]	0.50%	1.00%
Mature Market Share Range	[1]	8.90%	9.80%
Operating Profit Margin Range	[1]	31.30%
Maximum [Member]
Schedule Of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]
Year 1 Market Revenue Growth Rate Range	[1]	0.50%	0.50%
Long-term Market Revenue Growth Rate Range (Years 6 - 10)	[1]	1.00%	1.50%
Mature Market Share Range	[1]	14.20%	14.30%
Operating Profit Margin Range	[1]	34.10%

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