Note 14 - Segment Information - Segment Information (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 (less agency commissions)	$ 579	$ 517	$ 508	$ 518	$ 329	$ 279	$ 250	$ 226	$ 2,122	$ 1,084	$ 883
Operating expenses before depreciation, amortization and (gain) loss on disposal of assets, net:									1,503	637
Depreciation and amortization									195	75
(Gain) loss on disposal of assets, net									54	17	74
Operating expenses									1,644	695	593
Operating income	180	$ 139	$ 119	$ 40	151	$ 108	$ 80	$ 50	478	389	290
Interest expense									227	107	95
Capital expenditures (excluding business combinations)									110	70	35
Goodwill	1,446				612				1,446	612	611
Total Assets	6,972				4,213				6,972	4,213
Corporate, Non-Segment [Member]
Revenue (less agency commissions)									0	0
Operating expenses before depreciation, amortization and (gain) loss on disposal of assets, net:									104	41
Depreciation and amortization									2	1
(Gain) loss on disposal of assets, net									(0)	(0)
Operating expenses									106	42
Operating income									(106)	(42)
Interest expense									227	107
Capital expenditures (excluding business combinations)									5	2
Goodwill	0				0				0	0
Total Assets	289				1,450				289	1,450
Broadcasting, Segment [Member]
Revenue (less agency commissions)									2,035	1,084	883
Operating expenses before depreciation, amortization and (gain) loss on disposal of assets, net:									1,325	596
Depreciation and amortization									180	74
(Gain) loss on disposal of assets, net									54	17
Operating expenses									1,451	653
Operating income									584	431
Interest expense									0	0
Capital expenditures (excluding business combinations)									104	68
Goodwill	1,405				612				1,405	612
Total Assets	6,530				2,763				6,530	2,763
Production Companies, Segment [Member]
Revenue (less agency commissions)									87	0	$ 0
Operating expenses before depreciation, amortization and (gain) loss on disposal of assets, net:									74	0
Depreciation and amortization									13	0
(Gain) loss on disposal of assets, net									(0)	(0)
Operating expenses									87	0
Operating income									0	0
Interest expense									0	0
Capital expenditures (excluding business combinations)									1	0
Goodwill	41				0				41	0
Total Assets	$ 153				$ 0				$ 153	$ 0