Note 1 - Basis of Presentation (Details Textual) $ in Millions	9 Months Ended
	Sep. 30, 2023 USD ($)	Feb. 23, 2023 USD ($)	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
Number of Operating Segments	2
Number of Television Markets	113
Percent of US Television Households Reached	36.00%
Number of Television Markets with Top-Rated Stations	80
Number of Television Markets with First and/or Second Rated Stations	102
Accounts Receivable, Allowance for Credit Loss	$ 31		$ 16	$ 12	$ 16
Wells Fargo Bank, N.A. [Member]
Accounts Receivable Securitization Program Maximum Capacity		$ 300
Proceeds from Accounts Receivable Securitization	300
Accounts Receivable Securitization, Unsold Receivables	250
Accounts Receivable Securitization, Total Receivables	550
Accounts Receivable Securitization, Charge for Discount	$ 8
Wells Fargo Bank, N.A. [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	100.00%
Diamond Sports Group, LLC [Member]
Accounts Receivable, Allowance for Credit Loss	$ 17