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Note 1 - Basis of Presentation (Details Textual) $ in Millions |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Feb. 08, 2024 USD ($) | Mar. 31, 2024 USD ($) Rate | Mar. 31, 2023 USD ($) | Dec. 31, 2023 USD ($) | Feb. 23, 2023 USD ($)
Number of Operating Segments |  | 2 |  |  |
Number of Television Markets |  | 114 |  |  |
Percent of US Television Households Reached (Rate) | Rate |  | 36.00% |  |  |
Number of Television Markets with Top-Rated Stations |  | 79 |  |  |
Number of Television Markets with First and/or Second Rated Stations |  | 102 |  |  |
Proceeds from Sale of Long-Term Investments |  | $ 110 | $ 0 |  |
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] |  | Secured Overnight Financing Rate (SOFR) [Member] |  |  |
Wells Fargo Bank, N.A. [Member] |  |  |  |  |
Accounts Receivable Securitization Program Maximum Capacity |  |  |  |  | $ 300
Debt Instrument, Basis Spread on Variable Rate |  | 1.00% |  |  |
Proceeds from Accounts Receivable Securitization |  | $ 300 |  | $ 300 |
Accounts Receivable Securitization, Unsold Receivables |  | 307 |  | $ 296 |
Accounts Receivable Securitization, Total Receivables |  | 607 | 597 |  |
Accounts Receivable Securitization, Charge for Discount |  |  | 9 |  |
Sale Agreement with the Doraville Community Improvement District [Member] |  |  |  |  |
Total Proceeds From Project |  | $ 5 | $ 26 |  |
Broadcast Music Inc. [Member] |  |  |  |  |
Proceeds from Sale of Long-Term Investments | $ 110 |  |  |  |

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