Note 14 - Segment Information - Segment Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue (less agency commissions)	$ 2,413	$ 2,381	$ 2,122
Operating expenses before depreciation, amortization and loss on disposal of assets, net:	1,769	1,457	1,503
Depreciation and amortization	221	201	195
Loss on disposal of assets, net	42	(29)	(54)
Total operating expenses	2,032	1,629	1,644
Operating income	381	752	478
Interest expense	205	191	227
Capital expenditures (excluding business combinations)	207	110	110
Goodwill	2,649	1,460	1,446
Total assets	11,108	7,643	6,972
(Gain) loss on disposal of assets, net	42	(29)	(54)
Corporate, Non-Segment [Member]
Revenue (less agency commissions)	0	0	0
Operating expenses before depreciation, amortization and loss on disposal of assets, net:	159	65	104
Depreciation and amortization	3	3	2
Loss on disposal of assets, net	1	0	0
Total operating expenses	163	68	106
Operating income	(163)	(68)	(106)
Interest expense	205	191	227
Capital expenditures (excluding business combinations)	3	0	5
Goodwill	0	0	0
Total assets	247	871	289
(Gain) loss on disposal of assets, net	1	0	0
Broadcasting, Segment [Member]
Revenue (less agency commissions)	2,340	2,320	2,035
Operating expenses before depreciation, amortization and loss on disposal of assets, net:	1,548	1,340	1,325
Depreciation and amortization	206	186	180
Loss on disposal of assets, net	41	(31)	(54)
Total operating expenses	1,795	1,495	1,451
Operating income	545	825	584
Interest expense	0	0	0
Capital expenditures (excluding business combinations)	94	106	104
Goodwill	2,604	1,419	1,405
Total assets	10,592	6,631	6,530
(Gain) loss on disposal of assets, net	41	(31)	(54)
Production Companies, Segment [Member]
Revenue (less agency commissions)	73	61	87
Operating expenses before depreciation, amortization and loss on disposal of assets, net:	62	52	74
Depreciation and amortization	12	12	13
Loss on disposal of assets, net	0	2	0
Total operating expenses	74	66	87
Operating income	(1)	(5)	0
Interest expense	0	0	0
Capital expenditures (excluding business combinations)	110	4	1
Goodwill	45	41	41
Total assets	269	141	153
(Gain) loss on disposal of assets, net	$ 0	$ 2	$ 0