Note 3 - Acquisitions and Divestitures - Transaction Related Expenses (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)
Transaction related expenses	$ 79
Broadcast Licenses [Member]
Transaction related expenses	45
Corporate and Administrative [Member]
Transaction related expenses	34
Legal, Consulting and Other Professional Fees [Member]
Transaction related expenses	24
Incentive Compensation and Severance Costs [Member]
Transaction related expenses	21
Termination of Sales Representation Agreements [Member]
Transaction related expenses	$ 34