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Note 21 - Other Postretirement Benefits - Schedule Of Changes In Projected Benefit Obligations (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Interest cost $ 1 $ 1 $ 1
Other Postretirement Benefits Plan [Member]      
Net benefit obligation at beginning of period 52 58  
Interest cost 1 1  
Actuarial (gain) loss (7) (5)  
Benefit payments (3) (2)  
Net benefit obligation at end of period 43 52 $ 58
Underfunded status at end of period $ (43) $ (52)