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Note 19 - Retirement Plans - Weighted-average Asset Allocation By Assets Category (Details)
Dec. 31, 2023
Dec. 31, 2022
Major US Plans [Member]    
Asset allocations 100.00% 100.00%
Major US Plans [Member] | Debt Securities [Member]    
Asset allocations 20.00% 20.00%
Major US Plans [Member] | Debt Securities [Member] | Minimum [Member]    
Target asset allocations 18.00%  
Major US Plans [Member] | Debt Securities [Member] | Maximum [Member]    
Target asset allocations 24.00%  
Major US Plans [Member] | Real Estate [Member]    
Asset allocations 0.00% 1.00%
Target asset allocations 0.00%  
Major US Plans [Member] | Cash and Cash Equivalents [Member]    
Asset allocations 5.00% 7.00%
Major US Plans [Member] | Cash and Cash Equivalents [Member] | Minimum [Member]    
Target asset allocations 0.00%  
Major US Plans [Member] | Cash and Cash Equivalents [Member] | Maximum [Member]    
Target asset allocations 10.00%  
Major US Plans [Member] | Private Equity Funds [Member]    
Asset allocations 31.00% 30.00%
Major US Plans [Member] | Private Equity Funds [Member] | Minimum [Member]    
Target asset allocations 23.00%  
Major US Plans [Member] | Private Equity Funds [Member] | Maximum [Member]    
Target asset allocations 28.00%  
Major US Plans [Member] | Hedge Funds [Member]    
Asset allocations [1] 44.00% 42.00%
Major US Plans [Member] | Hedge Funds [Member] | Minimum [Member]    
Target asset allocations [1] 46.00%  
Major US Plans [Member] | Hedge Funds [Member] | Maximum [Member]    
Target asset allocations [1] 58.00%  
Major Non-US Plans [Member]    
Asset allocations 100.00% 100.00%
Major Non-US Plans [Member] | Debt Securities [Member]    
Asset allocations 16.00% 16.00%
Major Non-US Plans [Member] | Debt Securities [Member] | Minimum [Member]    
Target asset allocations 10.00%  
Major Non-US Plans [Member] | Debt Securities [Member] | Maximum [Member]    
Target asset allocations 20.00%  
Major Non-US Plans [Member] | Equity Securities [Member]    
Asset allocations 6.00% 6.00%
Major Non-US Plans [Member] | Equity Securities [Member] | Minimum [Member]    
Target asset allocations 0.00%  
Major Non-US Plans [Member] | Equity Securities [Member] | Maximum [Member]    
Target asset allocations 10.00%  
Major Non-US Plans [Member] | Real Estate [Member]    
Asset allocations 2.00% 2.00%
Major Non-US Plans [Member] | Real Estate [Member] | Minimum [Member]    
Target asset allocations 0.00%  
Major Non-US Plans [Member] | Real Estate [Member] | Maximum [Member]    
Target asset allocations 5.00%  
Major Non-US Plans [Member] | Cash and Cash Equivalents [Member]    
Asset allocations 2.00% 4.00%
Major Non-US Plans [Member] | Cash and Cash Equivalents [Member] | Minimum [Member]    
Target asset allocations 0.00%  
Major Non-US Plans [Member] | Cash and Cash Equivalents [Member] | Maximum [Member]    
Target asset allocations 5.00%  
Major Non-US Plans [Member] | Private Equity Funds [Member]    
Asset allocations 8.00% 8.00%
Major Non-US Plans [Member] | Private Equity Funds [Member] | Minimum [Member]    
Target asset allocations 0.00%  
Major Non-US Plans [Member] | Private Equity Funds [Member] | Maximum [Member]    
Target asset allocations 10.00%  
Major Non-US Plans [Member] | Hedge Funds [Member]    
Asset allocations 6.00% 4.00%
Major Non-US Plans [Member] | Hedge Funds [Member] | Minimum [Member]    
Target asset allocations 0.00%  
Major Non-US Plans [Member] | Hedge Funds [Member] | Maximum [Member]    
Target asset allocations 10.00%  
Major Non-US Plans [Member] | Insurance Contracts [Member]    
Asset allocations 60.00% 60.00%
Major Non-US Plans [Member] | Insurance Contracts [Member] | Minimum [Member]    
Target asset allocations 25.00%  
Major Non-US Plans [Member] | Insurance Contracts [Member] | Maximum [Member]    
Target asset allocations 75.00%  
[1] The 2023 target for hedge funds includes a policy allocation to U.S. government bonds that is obtained via treasury futures contracts.