Note 13 - Goodwill and Intangible Assets - Changes in Goodwill and Other Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill	$ 612	$ 611
Goodwill, Net additions	834	1
Goodwill	1,446	612	$ 611
Broadcast licenses	1,530
Broadcast licenses	3,573	1,530
Finite-lived intangible assets	53	74
Finite-lived Intangible Assets Acquired	522	0
Amortization of Intangible Assets	(115)	(21)	(25)
Finite-lived intangible assets	460	53	74
Total intangible assets net of accumulated amortization	2,195	2,216
Total intangible assets net of accumulated amortization, Net additions	3,399	0
Total intangible assets net of accumulated amortization	5,479	2,195	2,216
Goodwill, Dispositions	0	0
Broadcast Licenses [Member]
Broadcast licenses	1,530	1,531
Broadcast licenses, Net additions	2,043
Broadcast licenses	$ 3,573	1,530	$ 1,531
Broadcast licenses, Net additions		$ (1)