Note 3 - Acquisitions and Divestitures - Transaction Related Expenses (Details) $ in Millions	12 Months Ended
Dec. 31, 2021 USD ($)
Transaction related expenses	$ 81
Broadcast Licenses [Member]
Transaction related expenses	3
Corporate and Administrative [Member]
Transaction related expenses	71
Miscellaneous (Income) Expense, Net [Member]
Transaction related expenses	7
Legal, Consulting and Other Professional Fees [Member]
Transaction related expenses	80
Termination of Sales Representation Agreements [Member]
Transaction related expenses	$ 1

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 23
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479405/805-10-25-23

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration