Note 13 - Segment Information - Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Revenue (less agency commissions)	$ 868	$ 547	$ 1,695	$ 1,091
Operating expenses before depreciation, amortization and gain on disposal of assets, net:			1,151	784
Depreciation and amortization			167	103
Gain on disposal of assets, net	0	(1)	(5)	(5)
Operating expenses	650	439	1,313	882
Operating income (loss)	218	108	382	209
Interest expense	81	47	160	95
Capital expenditures (excluding business combinations)			159	121
Goodwill	2,657		2,657		$ 2,649
Total assets	11,123		11,123		11,108
Broadcasting, Segment [Member]
Revenue (less agency commissions)	855	537	1,659	1,067
Operating expenses before depreciation, amortization and gain on disposal of assets, net:			1,058	715
Depreciation and amortization			159	95
Gain on disposal of assets, net			(5)	(5)
Operating expenses			1,212	805
Operating income (loss)			447	262
Interest expense			0	0
Capital expenditures (excluding business combinations)			66	28
Goodwill	2,612		2,612		2,604
Total assets	10,570		10,570		10,592
Production Companies, Segment [Member]
Revenue (less agency commissions)	13	$ 10	36	24
Operating expenses before depreciation, amortization and gain on disposal of assets, net:			40	26
Depreciation and amortization			6	6
Gain on disposal of assets, net			0	0
Operating expenses			46	32
Operating income (loss)			(10)	(8)
Interest expense			0	0
Capital expenditures (excluding business combinations)			93	6
Goodwill	45		45		45
Total assets	343		343		269
Other Segments [Member]
Revenue (less agency commissions)			0	0
Operating expenses before depreciation, amortization and gain on disposal of assets, net:			53	43
Depreciation and amortization			2	2
Gain on disposal of assets, net			0	0
Operating expenses			55	45
Operating income (loss)			(55)	(45)
Interest expense			160	95
Capital expenditures (excluding business combinations)			0	$ 87
Goodwill	0		0		0
Total assets	$ 210		$ 210		$ 247