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Note 10 - Fair Value - Fair Value of Financial Instruments (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Reported Value Measurement [Member]    
Non-qualified employee benefit plan investments $ 7 $ 10
Long-term debt (including current portion) (2,087) (2,011)
Reported Value Measurement [Member] | Cross Currency Interest Rate Contract [Member]    
Cross-currency interest rate contracts (12) (22)
Estimate of Fair Value Measurement [Member]    
Non-qualified employee benefit plan investments 7 10
Long-term debt (including current portion) (2,028) (1,897)
Estimate of Fair Value Measurement [Member] | Cross Currency Interest Rate Contract [Member]    
Cross-currency interest rate contracts $ (12) $ (22)