Broadcast Licenses, Goodwill and Other Intangible Assets (Details 1)	3 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rates	12.30%	12.20%	12.30%
Operating profit margin ranges	19.50%	19.50%	20.80%
Market long-term revenue growth rates	0.90%	1.30%	1.20%
Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rates	12.40%	12.40%	12.40%
Operating profit margin ranges	36.40%	36.40%	36.40%
Market long-term revenue growth rates	3.40%	3.10%	4.10%