Note 14 - Segment Information - Segment Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenue (less agency commissions)	$ 3,676	$ 2,413	$ 2,381
Operating expenses before depreciation, amortization and loss on disposal of assets, net:	2,352	1,769	1,457
Depreciation and amortization	336	221	201
Gain on disposal of assets, net	(2)	42	(29)
Total operating expenses	2,686	2,032	1,629
Operating income (loss)	990	381	752
Interest expense	354	205	191
Capital expenditures (excluding business combinations)	436	207	110
Goodwill	2,663	2,649	1,460
Total assets	11,152	11,108	7,643
(Gain) loss on disposal of assets, net	(2)	42	(29)
Corporate, Non-Segment [Member]
Revenue (less agency commissions)	0	0	0
Operating expenses before depreciation, amortization and loss on disposal of assets, net:	104	159	65
Depreciation and amortization	3	3	3
Gain on disposal of assets, net	0	1	0
Total operating expenses	107	163	68
Operating income (loss)	(107)	(163)	(68)
Interest expense	354	205	191
Capital expenditures (excluding business combinations)	6	3	0
Goodwill	0	0	0
Total assets	173	247	871
(Gain) loss on disposal of assets, net	0	1	0
Broadcasting, Segment [Member]
Revenue (less agency commissions)	3,583	2,340	2,320
Operating expenses before depreciation, amortization and loss on disposal of assets, net:	2,165	1,548	1,340
Depreciation and amortization	321	206	186
Gain on disposal of assets, net	(2)	41	(31)
Total operating expenses	2,484	1,795	1,495
Operating income (loss)	1,099	545	825
Interest expense	0	0	0
Capital expenditures (excluding business combinations)	163	94	106
Goodwill	2,618	2,604	1,419
Total assets	10,444	10,592	6,631
(Gain) loss on disposal of assets, net	(2)	41	(31)
Production Companies, Segment [Member]
Revenue (less agency commissions)	93	73	61
Operating expenses before depreciation, amortization and loss on disposal of assets, net:	83	62	52
Depreciation and amortization	12	12	12
Gain on disposal of assets, net	0	0	2
Total operating expenses	95	74	66
Operating income (loss)	(2)	(1)	(5)
Interest expense	0	0	0
Capital expenditures (excluding business combinations)	267	110	4
Goodwill	45	45	41
Total assets	535	269	141
(Gain) loss on disposal of assets, net	$ 0	$ 0	$ 2