Note 11 - Goodwill and Intangible Assets - Intangible Assets and Related Accumulated Amortization (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Goodwill, Gross	$ 1,732	$ 1,559
Goodwill	1,633	1,460
Other intangible assets, net	407	395
Total intangibles	6,271	5,804
Total intangibles, accumulated amortization	(447)	(370)
Total intangibles	5,824	5,434
Network Affiliate [Member]
Finite-Lived Intangible Assets, Gross	83	67
Finite-Lived Intangible Assets, Accumulated Amortization	(38)	(28)
Other intangible assets, net	45	39
Other Intangible Assets [Member]
Finite-Lived Intangible Assets, Gross	717	644
Finite-Lived Intangible Assets, Accumulated Amortization	(355)	(288)
Other intangible assets, net	362	356
Intangible Assets Subject to Amortization [Member]
Finite-Lived Intangible Assets, Gross	800	711
Finite-Lived Intangible Assets, Accumulated Amortization	(393)	(316)
Other intangible assets, net	407	395
Broadcast Licenses [Member]
Indefinite-lived Intangible Assets (Excluding Goodwill), Gross	3,838	3,633
Indefinite-Lived Intangible Assets (Excluding Goodwill), Accumulated Amortization	(54)	(54)
Indefinite-Lived Intangible Assets (Excluding Goodwill)	3,784	3,579
Goodwill Not Amortizable [Member]
Goodwill, Gross	1,633	1,460
Goodwill, Accumulated Amortization	0	0
Goodwill	1,633	1,460
Intangible Assets Not Subject to Amortization [Member]
Goodwill and Indefinite-Lived Intangible Assets, Gross	5,471	5,093
Goodwill and Indefinite-lived Intangible Assets, Accumulated Amortization	(54)	(54)
Goodwill and Indefinite-Lived Assets, Net	$ 5,417	$ 5,039