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Note 19 - Retirement Plans - Amounts Recognized in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
UNITED STATES    
Prior service (cost) credit $ (45) $ (25)
Net actuarial gain (loss) 449 594
Total 404 569
Foreign Plan [Member]    
Prior service (cost) credit 2 2
Net actuarial gain (loss) (52) (43)
Total $ (50) $ (41)