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Note 9 - Revenue 1 (Details Textual) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Mar. 31, 2023
Dec. 31, 2022
Contract with Customer, Liability $ 52   $ 52     $ 51
Contract with Customer, Liability, Revenue Recognized 8 $ 12 28 $ 29    
Contract with Customer, Cash Payments Received for Liabilities That Have Been Deferred (22) $ (22) (27) $ (33)    
Revenue, Remaining Performance Obligation, Amount 45   45      
Other Current Assets [Member]            
Contract with Customer, Asset, after Allowance for Credit Loss, Current         $ 1 1
Other Current Liabilities [Member]            
Contract with Customer, Liability 42   42     40
Other Noncurrent Liabilities [Member]            
Contract with Customer, Liability $ 10   $ 10     $ 11