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Note 9 - Commitments and Contingencies (Details Textual) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Dec. 31, 2025
BRAZIL    
Commitments And Contingencies Disclosure [LineItems]    
Restricted Cash and Investments, Noncurrent $ 7 $ 7
Federal And State Value Added Taxes Litigations And Civil Litigation And Disputes With Former Employees [Member] | BRAZIL    
Commitments And Contingencies Disclosure [LineItems]    
Restricted Cash 100  
Loss Contingency Accrual 7  
Aggregate Claims 51  
Loss Contingency, Estimate of Possible Loss 5  
Restricted Cash and Investments, Noncurrent 7  
Assets, Noncurrent 41  
Bank Guarantees And Letters Of Credit [Member]    
Commitments And Contingencies Disclosure [LineItems]    
Guarantor Obligations, Maximum Exposure, Undiscounted 2  
Surety Bond [Member]    
Commitments And Contingencies Disclosure [LineItems]    
Guarantor Obligations, Maximum Exposure, Undiscounted 54  
L C Facility Agreement [Member]    
Commitments And Contingencies Disclosure [LineItems]    
Letters of Credit Outstanding, Amount $ 24