Note 10 - Goodwill and Intangible Assets - Intangible Assets and Related Accumulated Amortization (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Goodwill	$ 1,446	$ 1,446
Other intangible assets, net	434	460
Intangible Assets Gross (Including Goodwill)	5,744	5,744
Accumulated Amortization Intangible Assets	(291)	(265)
Intangible Assets, Net (Including Goodwill)	5,453	5,479
Network Affiliate [Member]
Finite-Lived Intangible Assets, Gross	56	56
Finite-Lived Intangible Assets, Accumulated Amortization	(20)	(17)
Other intangible assets, net	36	39
Other Intangible Assets [Member]
Finite-Lived Intangible Assets, Gross	615	615
Finite-Lived Intangible Assets, Accumulated Amortization	(217)	(194)
Other intangible assets, net	398	421
Intangible Assets Subject to Amortization [Member]
Finite-Lived Intangible Assets, Gross	671	671
Finite-Lived Intangible Assets, Accumulated Amortization	(237)	(211)
Other intangible assets, net	434	460
Broadcast Licenses [Member]
Indefinite-lived Intangible Assets (Excluding Goodwill), Gross	3,627	3,627
Indefinite-Lived Intangible Assets (Excluding Goodwill), Accumulated Amortization	(54)	(54)
Indefinite-Lived Intangible Assets (Excluding Goodwill)	3,573	3,573
Goodwill Not Amortizable [Member]
Goodwill, Gross	1,446	1,446
Goodwill, Accumulated Amortization	0	0
Goodwill	1,446	1,446
Intangible Assets Not Subject to Amortization [Member]
Goodwill and Indefinite-Lived Intangible Assets, Gross	5,073	5,073
Goodwill and Indefinite-lived Intangible Assets, Accumulated Amortization	(54)	(54)
Goodwill and Indefinite-Lived Assets, Net	$ 5,019	$ 5,019