Note 13 - Goodwill and Intangible Assets - Intangible Assets and Related Accumulated Amortization (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Goodwill, Gross	$ 1,559	$ 1,545	$ 711
Goodwill	1,460	1,446	612
Other intangible assets, net	395	460	53
Total intangible assets, Gross	5,804	5,744
Total intangible assets, Accumulated Amortization	(370)	(265)
Total intangible assets, Net	5,434	5,479	$ 2,195
Network Affiliate [Member]
Finite-Lived Intangible Assets, Gross	67	56
Finite-Lived Intangible Assets, Accumulated Amortization	(28)	(17)
Other intangible assets, net	39	39
Other Intangible Assets [Member]
Finite-Lived Intangible Assets, Gross	644	615
Finite-Lived Intangible Assets, Accumulated Amortization	(288)	(194)
Other intangible assets, net	356	421
Intangible Assets Subject to Amortization [Member]
Finite-Lived Intangible Assets, Gross	711	671
Finite-Lived Intangible Assets, Accumulated Amortization	(316)	(211)
Other intangible assets, net	395	460
Broadcast Licenses [Member]
Indefinite-lived Intangible Assets (Excluding Goodwill), Gross	3,633	3,627
Indefinite-Lived Intangible Assets (Excluding Goodwill), Accumulated Amortization	(54)	(54)
Indefinite-Lived Intangible Assets (Excluding Goodwill)	3,579	3,573
Goodwill Not Amortizable [Member]
Goodwill, Gross	1,460	1,446
Goodwill, Accumulated Amortization	0	0
Goodwill	1,460	1,446
Intangible Assets Not Subject to Amortization [Member]
Goodwill and Indefinite-Lived Intangible Assets, Gross	5,093	5,073
Goodwill and Indefinite-lived Intangible Assets, Accumulated Amortization	(54)	(54)
Goodwill and Indefinite-Lived Assets, Net	$ 5,039	$ 5,019