Summary of Significant Accounting Policies (Intangible Assets and Goodwill) (Details)	12 Months Ended
	Jun. 30, 2017 reporting_unit
Finite and Indefinite-lived Intangible Assets by Major Class [Line Items]
Number of reporting units	3
FCC licenses [Member]
Finite and Indefinite-lived Intangible Assets by Major Class [Line Items]
Maximum term of FCC broadcast licenses (in years)	8 years
Minimum [Member] | Network affiliation agreements [Member]
Finite and Indefinite-lived Intangible Assets by Major Class [Line Items]
Amortizable intangible assets estimated useful lives	25 years
Minimum [Member] | Finite-lived Intangible Assets, Excluding Network Affiliation Agreements [Member]
Finite and Indefinite-lived Intangible Assets by Major Class [Line Items]
Amortizable intangible assets estimated useful lives	1 year
Maximum [Member] | Network affiliation agreements [Member]
Finite and Indefinite-lived Intangible Assets by Major Class [Line Items]
Amortizable intangible assets estimated useful lives	40 years
Maximum [Member] | Finite-lived Intangible Assets, Excluding Network Affiliation Agreements [Member]
Finite and Indefinite-lived Intangible Assets by Major Class [Line Items]
Amortizable intangible assets estimated useful lives	10 years