GOODWILL AND RADIO BROADCASTING LICENSES: (Details 1) (Radio Marketing Units Member [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2014		Oct. 01, 2013
Schedule of GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS [Line Items]
Pre-tax impairment charge (in millions)	$ 0	[1]	$ 0	[2]
Discount Rate	10.00%	[1]	10.00%	[2]
Year 1 Market Revenue Growth Rate Range	2.00%	[1]
Long-term Market Revenue Growth Rate Range (Years 6 - 10)	1.50%	[1]
Mature Market Share Range	7.90%	[1]
Operating Profit Margin Range	28.40%	[1]
Minimum [Member]
Schedule of GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS [Line Items]
Year 1 Market Revenue Growth Rate Range			0.00%	[2]
Long-term Market Revenue Growth Rate Range (Years 6 - 10)			1.00%	[2]
Mature Market Share Range			7.10%	[2]
Operating Profit Margin Range			28.40%	[2]
Maximum [Member]
Schedule of GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS [Line Items]
Year 1 Market Revenue Growth Rate Range			2.00%	[2]
Long-term Market Revenue Growth Rate Range (Years 6 - 10)			2.00%	[2]
Mature Market Share Range			19.80%	[2]
Operating Profit Margin Range			56.40%	[2]

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

[2] Reflects the key assumptions for testing only those radio markets with remaining goodwill.