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Note 14 - Debt - Schedule of Unsecured Debt (Details) (Parentheticals) - Unsecured Debt [Member]
12 Months Ended
Dec. 31, 2023
The 4.750% Notes, Due February 21, 2026 [Member]  
Debt Instrument, Interest Rate 4.75%
Debt Instrument, Maturity Date Feb. 21, 2026
The 4.950% Notes, Due May 15, 2053 [Member]  
Debt Instrument, Interest Rate 4.95%
Debt Instrument, Maturity Date May 15, 2053