Note 11 - Retirement Plans (Details Textual) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Common Stock, Capital Shares Reserved for Future Issuance (in shares)	5
Defined Benefit Plan, Plan Assets, Amount	$ 117	$ 104	$ 119
Pension Plan [Member] | Gray Pension Plan [Member]
Defined Benefit Plan, Accumulated Benefit Obligation	104	102
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	4
Capital Accumulation Plan [Member]
Defined Contribution Plan, Employer Discretionary Contribution Amount	26	17	15
Defined Contribution Plan, Expected Contributions In Next Twelve Months	$ 27
Common Stock, Capital Shares Reserved for Future Issuance (in shares)	2
Capital Accumulation Plan [Member] | First 3% of Each Employee's Salary Deferral [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	100.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	1.00%
Capital Accumulation Plan [Member] | Next 2% of Each Employee's Salary Deferral [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	5.00%
Profit Sharing Contribution [Member]
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 10	$ 9	$ 7
Meredith Plan [Member]
Defined Benefit Plan, Plan Assets, Amount	16
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation	$ 11