Note 12 - Segment Information - Segment Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Revenue (less agency commissions)	$ 534	$ 518
Operating expenses before depreciation, amortization and gain on disposal of assets, net:	369	439
Depreciation and amortization	47	49
Gain on disposal of assets, net	6	10
Operating expenses	410	478
Operating income (loss)	124	40
Interest expense	52	58
Capital expenditures (excluding business combinations)	27	18
Goodwill	1,446		$ 1,446
Total Assets	7,028		6,972
Corporate, Non-Segment [Member]
Revenue (less agency commissions)	0	0
Operating expenses before depreciation, amortization and gain on disposal of assets, net:	15	48
Depreciation and amortization	1	1
Gain on disposal of assets, net	(0)	1
Operating expenses	16	48
Operating income (loss)	(16)	(48)
Interest expense	52	58
Capital expenditures (excluding business combinations)	0	3
Goodwill	0		0
Total Assets	438		289
Broadcasting, Segment [Member]
Revenue (less agency commissions)	515	481
Operating expenses before depreciation, amortization and gain on disposal of assets, net:	335	356
Depreciation and amortization	43	45
Gain on disposal of assets, net	6	9
Operating expenses	372	392
Operating income (loss)	143	89
Interest expense	0	0
Capital expenditures (excluding business combinations)	27	15
Goodwill	1,405		1,405
Total Assets	6,457		6,530
Production Companies, Segment [Member]
Revenue (less agency commissions)	19	37
Operating expenses before depreciation, amortization and gain on disposal of assets, net:	19	35
Depreciation and amortization	3	3
Gain on disposal of assets, net	(0)	(0)
Operating expenses	22	38
Operating income (loss)	(3)	(1)
Interest expense	0	0
Capital expenditures (excluding business combinations)	0	$ 0
Goodwill	41		41
Total Assets	$ 133		$ 153