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Note 3 - Acquisitions and Divestitures (Details Textual) - USD ($) $ in Millions |  |  |  |  |  |  |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2020 | Nov. 02, 2020 | Sep. 01, 2020 | Jul. 31, 2020 | Oct. 01, 2019 | Sep. 25, 2019 | May 01, 2019 | Jan. 02, 2019 | Dec. 31, 2018 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Business Combination, Acquisition Related Costs |  |  |  |  |  |  |  |  |  |  | $ 79 |
Finite-lived Intangible Assets Acquired |  |  |  |  |  |  |  |  |  | $ 40 | 522 |
Goodwill, Ending Balance | $ 1,460 |  |  |  |  |  |  |  | $ 612 | 1,460 | 1,446 | $ 612
Proceeds from Divestiture of Businesses |  |  |  |  |  |  |  |  |  | 0 | 253 | $ 9
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 |  |  |  |  |  |  |
WSWG-TV [Member] |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Disposition of Business |  |  |  |  |  |  |  |  | $ 5 |  |  |
WSWG-TV [Member] | Lockwood Broadcasting, Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Divestiture of Businesses |  |  |  |  |  |  |  | 9 |  |  |  |
Broadcast Licenses Acquired in 2020 [Member] |  |  |  |  |  |  |  |  |  |  |  |
Indefinite-lived Intangible Assets Acquired |  |  |  |  |  |  |  |  |  | 5 |  |
Alaska Transactions [Member] |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross |  |  |  | $ 19 |  |  |  |  |  |  |  |
Goodwill, Ending Balance | 2 |  |  |  |  |  |  |  |  | 2 |  |
Columbus Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross |  |  | $ 22 |  |  |  |  |  |  |  |  |
Goodwill, Ending Balance | 1 |  |  |  |  |  |  |  |  | 1 |  |
Sioux Falls Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross |  | $ 22 |  |  |  | $ 33 |  |  |  |  |  |
Goodwill, Ending Balance | 11 |  |  |  | 2 |  |  |  |  | 11 | 2 |
Lubbock Transactions [Member] |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross | 23 |  |  |  |  |  |  |  |  |  |  |
The 2020 Acquisitions [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Acquisition Related Costs |  |  |  |  |  |  |  |  |  | 1 |  |
Goodwill, Ending Balance | $ 14 |  |  |  |  |  |  |  |  | $ 14 |  |
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] |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross |  |  |  |  |  |  |  | 2,840 |  |  |  |
Business Combination, Consideration Transferred, Total |  |  |  |  |  |  |  | 3,660 |  |  | 3,677 |
Goodwill, Ending Balance |  |  |  |  |  |  |  | $ 829 |  |  | 829 |
Business Acquisition, Goodwill, Expected Tax Deductible Amount |  |  |  |  | 150 |  |  |  |  |  |  |
Raycom [Member] | Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in 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) |  |  |  |  |  |  |  | 650,000 |  |  |  |
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable |  |  |  |  |  |  |  | $ 650 |  |  |  |
KYOU-TV and WUPV-TV [Member] |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross |  |  |  |  |  |  |  | 17 |  |  |  |
Business Combination, Consideration Transferred, Total |  |  |  |  |  |  |  |  |  |  | 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] |  |  |  |  |  |  |  |  |  |  |  |
Goodwill, Ending Balance |  |  |  |  |  |  |  |  |  |  | 834 |
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual |  |  |  |  |  |  |  |  |  |  | 1,100 |
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] | 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] | 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] | 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 |  |  |  |

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