Note 2 - Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue	$ 579	$ 517	$ 508	$ 518	$ 329	$ 279	$ 250	$ 226	$ 2,122	$ 1,084	$ 883
Sales Channel, Directly to Consumer [Member]
Revenue									1,270	552	474
Sales Channel, Through Intermediary [Member]
Revenue									852	532	409
Local Advertising [Member]
Revenue									898	443	451
National Advertising [Member]
Revenue									229	114	119
Political Advertising [Member]
Revenue									68	155	16
Advertising [Member]
Revenue									1,195	712	586
Retransmission Consent [Member]
Revenue									796	355	277
Production Companies [Member]
Revenue									87	0	0
Service, Other [Member]
Revenue									$ 44	$ 17	$ 20