Note 12 - Goodwill and Intangible Assets - Changes in Goodwill and Other Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Goodwill			$ 612
Goodwill, Net additions			837
Goodwill	$ 1,449		1,449
Broadcast licenses			1,530
Broadcast licenses	3,558		3,558
Definite lived intangible assets			53
Finite-lived Intangible Assets Acquired			502
Amortization of Intangible Assets	(29)	$ (5)	(86)	$ (16)
Definite lived intangible assets	469		469
Total intangible assets net of accumulated amortization			2,195
Total intangible assets net of accumulated amortization, Net additions			3,367
Total intangible assets net of accumulated amortization	5,476		5,476
Broadcast Licenses [Member]
Broadcast licenses			1,530
Broadcast licenses, Net additions			2,028
Broadcast licenses	$ 3,558		$ 3,558