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Note 13 - Fair Value Measurements and Derivatives - Fair Value of Financial Instruments (Details) - Fair Value, Inputs, Level 2 [Member] - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
Reported Value Measurement [Member]    
Long-term debt $ 2,416 $ 2,510
Estimate of Fair Value Measurement [Member]    
Long-term debt $ 2,464 $ 2,492