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Note 5 - Retirement Plans - Amounts Recognized in the Statement of Financial Position (Details) - Pension Plan [Member] - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Noncurrent assets $ 1,033 $ 807
Current liabilities (31) (31)
Noncurrent liabilities (364) (518)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position, Total $ 638 $ 258