GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS: (Details 2) (Radio Marketing Units Member [Member], USD $) In Millions, unless otherwise specified	Oct. 01, 2012		Oct. 01, 2011		Oct. 01, 2010
Pre-tax impairment charge (in millions)	$ 0	[1]	$ 14.5	[1]	$ 0	[1]
Discount Rate	10.00%	[1]	10.00%	[1]	10.00%	[1]
Minimum [Member]
Year 1 Revenue Growth Rate Range	1.00%	[1]	2.00%	[1]	1.50%	[1]
Long-term Market Revenue Growth Rate Range (Years 6 - 10)	1.50%	[1]	1.50%	[1]	1.50%	[1]
Mature Market Share Range	6.70%	[1]	7.40%	[1]	7.00%	[1]
Operating Profit Margin Range	29.30%	[1]	29.50%	[1]	27.50%	[1]
Maximum [Member]
Year 1 Revenue Growth Rate Range	2.00%	[1]	2.50%	[1]	3.00%	[1]
Long-term Market Revenue Growth Rate Range (Years 6 - 10)	2.00%	[1]	2.00%	[1]	2.50%	[1]
Mature Market Share Range	20.80%	[1]	20.80%	[1]	23.00%	[1]
Operating Profit Margin Range	58.50%	[1]	54.00%	[1]	58.00%	[1]

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