Goodwill, Other Intangible Assets and Intangible Liabilities - Goodwill, other Intangible Assets and Intangible Liabilities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Goodwill, Impairment Loss	$ 0	$ 0	$ 0
Finite-Lived Intangible Assets, Gross	1,454,815,000	1,588,750,000
Finite-Lived Intangible Assets, Accumulated Amortization	(764,359,000)	(730,185,000)
Finite-Lived Intangible Assets, Net	690,456,000	858,565,000	1,025,134,000
Other intangible assets not subject to amortization	752,000,000	755,100,000	794,000,000
Total other intangible assets, net	1,442,456,000	1,613,665,000
Goodwill	3,228,601,000	3,228,988,000	$ 3,227,930,000
Total goodwill and other intangible assets	4,671,057,000	4,842,653,000
FCC licenses
Finite-Lived Intangible Assets [Line Items]
Other intangible assets not subject to amortization	737,200,000	740,300,000
Trade name
Finite-Lived Intangible Assets [Line Items]
Other intangible assets not subject to amortization	14,800,000	14,800,000
Affiliate relationships
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	212,000,000	212,000,000
Finite-Lived Intangible Assets, Accumulated Amortization	(79,500,000)	(66,250,000)
Finite-Lived Intangible Assets, Net	$ 132,500,000	145,750,000
Finite-Lived Intangible Asset, Useful Life (years)	16 years
Advertiser relationships
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 168,000,000	168,000,000
Finite-Lived Intangible Assets, Accumulated Amortization	(126,000,000)	(105,000,000)
Finite-Lived Intangible Assets, Net	$ 42,000,000	63,000,000
Finite-Lived Intangible Asset, Useful Life (years)	8 years
Network affiliation agreements
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 228,700,000	362,000,000
Finite-Lived Intangible Assets, Accumulated Amortization	(83,649,000)	(175,337,000)
Finite-Lived Intangible Assets, Net	$ 145,051,000	186,663,000
Network affiliation agreements | Minimum
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life (years)	11 years
Network affiliation agreements | Maximum
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life (years)	16 years
Retransmission consent agreements
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 830,100,000	830,100,000
Finite-Lived Intangible Assets, Accumulated Amortization	(467,073,000)	(377,033,000)
Finite-Lived Intangible Assets, Net	$ 363,027,000	453,067,000
Retransmission consent agreements | Minimum
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life (years)	7 years
Retransmission consent agreements | Maximum
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life (years)	12 years
Other
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 16,015,000	16,650,000
Finite-Lived Intangible Assets, Accumulated Amortization	(8,137,000)	(6,565,000)
Finite-Lived Intangible Assets, Net	$ 7,878,000	$ 10,085,000
Other | Minimum
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life (years)	5 years
Other | Maximum
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life (years)	15 years