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Note 3 - Acquisitions and Divestitures (Details Textual) $ / shares in Units, $ in Millions |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Sep. 23, 2021 USD ($) | Sep. 13, 2021 USD ($) | Aug. 02, 2021 USD ($) | Jun. 02, 2021 USD ($) $ / shares | Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($) | Dec. 31, 2020 USD ($)
Gain (Loss) on Disposition of Business |  |  |  |  | $ (53) | $ 0 | $ (53) | $ 0 |
Quincy Divestiture [Member] |  |  |  |  |  |  |  |  |
Proceeds from Divestiture of Businesses |  |  | $ 398 |  |  |  |  |  |
Disposal Group, Working Capital |  |  | 18 |  |  |  |  |  |
Gain (Loss) on Disposition of Business |  |  | (48) |  |  |  |  |  |
Quincy Acquisition [Member] |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred, Total |  |  | 930 |  |  |  | 930 |  |
Business Combination, Working Capital |  |  | $ 5 |  |  |  |  |  |
Business Combination, Television Stations Operated |  |  | 16 |  |  |  |  |  |
Disposal Group, Including Discontinued Operation, Consideration |  |  |  |  | 383 |  | 383 |  |
Third Rail Acquisition [Member] |  |  |  |  |  |  |  |  |
Disposal Group, Including Discontinued Operation, Consideration |  | $ 27 |  |  |  |  |  |  |
Third Rail Acquisition [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  | 1 year |  |  |  |  |  |  |
Third Rail Acquisition [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  | 4 years |  |  |  |  |  |  |
WJRT (ABC) in the Flint, Michigan Market [Member] |  |  |  |  |  |  |  |  |
Disposal Group, Including Discontinued Operation, Consideration | $ 72 |  |  |  |  |  |  |  |
Unconsolidated Construction Joint Venture Net Income (Loss) | $ 5 |  |  |  |  |  |  |  |
The2021 Acquisitions [Member] |  |  |  |  |  |  |  |  |
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual |  |  |  |  | $ 25 |  | $ 25 |  |
The 2020 Acquisitions [Member] |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross |  |  |  |  |  |  |  |  | $ 24
The 2020 Acquisitions [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  |  |  |  |  |  | 1 year |  |
Property, Plant and Equipment, Useful Life (Year) |  |  |  |  |  |  | 3 years |  |
The 2020 Acquisitions [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  |  |  |  |  |  | 4 years |  |
Property, Plant and Equipment, Useful Life (Year) |  |  |  |  |  |  | 40 years |  |
Meredith Corporation [Member] |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred, Total |  |  |  | $ 2,800 |  |  |  |  |
Business Acquisition, Share Price (in dollars per share) | $ / shares |  |  |  | $ 16.99 |  |  |  |  |

X
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