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Note 9 - Revenue 1 (Details Textual) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Contract with Customer, Liability $ 98   $ 98   $ 92
Contract with Customer, Liability, Revenue Recognized 9 $ 9 26 $ 29  
Contract with Customer, Cash Payments Received for Liabilities That Have Been Deferred 21 $ 17 32 $ 24  
Revenue, Remaining Performance Obligation, Amount 86   86    
Other Current Assets [Member]          
Contract with Customer, Asset, after Allowance for Credit Loss, Current 5   5   5
Other Current Liabilities [Member]          
Contract with Customer, Liability 45   45   35
Other Noncurrent Liabilities [Member]          
Contract with Customer, Liability $ 53   $ 53   $ 57