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Note 3 - Acquisitions and Divestitures (Details Textual) $ in Millions											12 Months Ended
	Dec. 01, 2021 USD ($)	Sep. 23, 2021 USD ($)	Aug. 02, 2021 USD ($)	Nov. 02, 2020 USD ($)	Sep. 01, 2020 USD ($)	Jul. 31, 2020 USD ($)	Oct. 01, 2019 USD ($)	Sep. 25, 2019 USD ($)	May 01, 2019 USD ($)	Jan. 02, 2019 USD ($) shares	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Sep. 13, 2021 USD ($)
Business Combination, Acquisition Related Costs											$ 81		$ 79
Finite-lived Intangible Assets Acquired											547	$ 40
Goodwill, Ending Balance											2,649	1,460	1,446
Broadcast Licenses Acquired in 2021 [Member]
Indefinite-lived Intangible Assets Acquired											4
Broadcast Licenses Acquired in 2020 [Member]
Indefinite-lived Intangible Assets Acquired												5
Quincy Acquisition [Member]
Gain (Loss) on Disposition of Business			$ 45
Proceeds from Divestiture of Businesses			401
Disposal Group, Working Capital			21
Stations Acquired from Raycom [Member]
Gain (Loss) on Disposition of Business										$ 234
WCAV-TV and WVAW-TV [Member]
Gain (Loss) on Disposition of Business							$ 19
Meredith Corporation [Member]
Business Combination, Consideration Transferred, Total	$ 2,800
Business Combination, Television Stations Operated	12
WJRT (ABC) in the Flint, Michigan Market [Member]
Disposal Group, Including Discontinued Operation, Consideration		$ 72
Gain (Loss) on Disposition of Business		$ (4)
Quincy Acquisition [Member]
Business Combination, Consideration Transferred, Total			936								936
Disposal Group, Including Discontinued Operation, Consideration											383
Business Combination, Working Capital			$ 6
Goodwill, Ending Balance											190
Third Rail Acquisition [Member]
Disposal Group, Including Discontinued Operation, Consideration														$ 27
Goodwill, Ending Balance											4
The2021 Acquisitions [Member]
Accounts Receivable, Gross Contractual Amount Over Recorded Fair Value											3
Business Acquisition, Goodwill, Expected Tax Deductible Amount											89
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual											128
Goodwill, Ending Balance											1,206
The2021 Acquisitions [Member] \| Retransmission Agreements [Member]
Finite-Lived Intangible Assets, Gross, Total											$ 374
Finite-Lived Intangible Asset, Useful Life (Year)											5 years
The2021 Acquisitions [Member] \| Network Affiliation Agreements [Member]
Finite-Lived Intangible Asset, Useful Life (Year)											5 years
The2021 Acquisitions [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)											3 years
Finite-Lived Intangible Asset, Useful Life (Year)											1 year
The2021 Acquisitions [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)											40 years
Finite-Lived Intangible Asset, Useful Life (Year)											10 years
Network Affiliate [Member] \| Network Affiliation Agreements [Member]
Finite-Lived Intangible Assets, Gross, Total											$ 136
Alaska Transactions [Member]
Payments to Acquire Businesses, Gross						$ 19
Goodwill, Ending Balance												2
Columbus Acquisition [Member]
Payments to Acquire Businesses, Gross					$ 22
Goodwill, Ending Balance												1
Sioux Falls Acquisition [Member]
Payments to Acquire Businesses, Gross				$ 22				$ 33
Goodwill, Ending Balance							2					11	2
The 2020 Acquisitions [Member]
Payments to Acquire Businesses, Gross												24
Business Combination, Acquisition Related Costs												1
Goodwill, Ending Balance												$ 20
The 2020 Acquisitions [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)											3 years
Finite-Lived Intangible Asset, Useful Life (Year)											1 year
The 2020 Acquisitions [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)											40 years
Finite-Lived Intangible Asset, Useful Life (Year)											4 years
Raycom [Member]
Business Combination, Consideration Transferred, Total										3,660	$ 3,677
Disposal Group, Including Discontinued Operation, Consideration											234
Business Acquisition, Goodwill, Expected Tax Deductible Amount							150
Payments to Acquire Businesses, Gross										2,840
Goodwill, Ending Balance										$ 829			829
Raycom [Member] \| Common Stock [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) \| shares										11,500,000
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable										$ 170
Raycom [Member] \| Preferred Stock [Member] \| Series A Perpetual Preferred Stock [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) \| shares										650,000
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable										$ 650
KYOU-TV and WUPV-TV [Member]
Business Combination, Consideration Transferred, Total											17
Disposal Group, Including Discontinued Operation, Consideration											$ (0)
Payments to Acquire Businesses, Gross										17
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Gross Contractual Receivables above Their Fair Value										2
WWNY-TV, WNYF-CD, and KEYC-TV [Member]
Payments to Acquire Businesses, Gross									$ 48
Goodwill, Ending Balance									$ 3
Charlottesville Acquisition [Member]
Payments to Acquire Businesses, Gross							$ 13
Goodwill, Ending Balance													0
Acquisitions 2019 [Member]
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual													1,100
Goodwill, Ending Balance													834
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual													$ 198
Acquisitions 2019 [Member] \| Retransmission Agreements [Member]
Finite-lived Intangible Assets Acquired										$ 322
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life (Year)										4 years 1 month 6 days
Acquisitions 2019 [Member] \| Network Affiliation Agreements [Member]
Finite-lived Intangible Assets Acquired										$ 50
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life (Year)										3 years 8 months 12 days
Acquisitions 2019 [Member] \| Off-Market Favorable Lease [Member]
Finite-lived Intangible Assets Acquired										$ 98
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life (Year)										7 years 8 months 12 days
Acquisitions 2019 [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)										3 years
Acquisitions 2019 [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)										40 years