Note 13 - Segment Information - Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Dec. 30, 2022
Revenue (less agency commissions)	$ 803	$ 909	$ 2,417	$ 2,604
Operating expenses before depreciation, amortization, impairment and loss on disposal of assets, net:			1,831	1,731
Depreciation and amortization			253	252
Impairment of goodwill and other intangible assets	43	0	43	0
Loss on disposal of assets, net			20	(6)
Operating expenses	719	664	2,147	1,977
Operating income (loss)	84	245	270	627
Interest expense	111	94	324	254
Capital expenditures (excluding business combinations)			288	298
Goodwill	2,643		2,643		$ 2,663	$ 2,663
Total assets	10,735		10,735		11,152
Operating expenses before depreciation, amortization and (gain) loss on disposal of assets, net:			1,831	1,731
Broadcasting, Segment [Member]
Revenue (less agency commissions)	783	889	2,363	2,548
Production Companies, Segment [Member]
Revenue (less agency commissions)	20	$ 20	54	56
Operating Segments [Member] | Broadcasting, Segment [Member]
Revenue (less agency commissions)			2,363	2,548
Operating expenses before depreciation, amortization, impairment and loss on disposal of assets, net:			1,664	1,595
Depreciation and amortization			241	240
Impairment of goodwill and other intangible assets			0
Loss on disposal of assets, net			18	(6)
Operating expenses			1,923	1,829
Operating income (loss)			440	719
Interest expense			0	0
Capital expenditures (excluding business combinations)			83	114
Goodwill	2,615		2,615		2,618
Total assets	10,014		10,014		10,444
Operating expenses before depreciation, amortization and (gain) loss on disposal of assets, net:			1,664	1,595
Operating Segments [Member] | Production Companies, Segment [Member]
Revenue (less agency commissions)			54	56
Operating expenses before depreciation, amortization, impairment and loss on disposal of assets, net:			88	56
Depreciation and amortization			9	10
Impairment of goodwill and other intangible assets			43
Loss on disposal of assets, net			2	0
Operating expenses			142	66
Operating income (loss)			(88)	(10)
Interest expense			0	0
Capital expenditures (excluding business combinations)			201	181
Goodwill	28		28		45
Total assets	653		653		535
Operating expenses before depreciation, amortization and (gain) loss on disposal of assets, net:			88	56
Segment Reconciling Items [Member]
Revenue (less agency commissions)			0	0
Operating expenses before depreciation, amortization, impairment and loss on disposal of assets, net:			79	80
Depreciation and amortization			3	2
Impairment of goodwill and other intangible assets			0
Loss on disposal of assets, net			0	0
Operating expenses			82	82
Operating income (loss)			(82)	(82)
Interest expense			324	254
Capital expenditures (excluding business combinations)			4	3
Goodwill	0		0		0
Total assets	$ 68		68		$ 173
Operating expenses before depreciation, amortization and (gain) loss on disposal of assets, net:			$ 79	$ 80