Note 10 - Income Taxes - Significant Components of Deferred Tax Liabilities and Assets (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Deferred tax liabilities:
Net book value of property and equipment	$ 146	$ 92
Broadcast licenses, goodwill and other intangible assets	1,373	878
Total deferred tax liabilities	1,519	970
Deferred tax assets:
Liability for accrued vacation	5	4
Liability for accrued bonus	9	5
Deferred payroll taxes	2	3
Allowance for credit losses	4	3
Liability for pension plan	6	11
Federal operating loss carryforwards	2	38
State and local operating loss carryforwards	24	21
Acquisition costs	2	2
Restricted stock	4	4
Investments	4	4
Interest expense limitation	4	4
Other	4	1
Total deferred tax assets	70	100
Valuation allowance for deferred tax assets	(22)	(15)
Net deferred tax assets	48	85
Deferred tax liabilities, net of deferred tax assets	$ 1,471	$ 885