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Note 19 - Subsequent Event - (Details Textual)
$ in Millions
9 Months Ended
May 16, 2026
Nov. 04, 2025
USD ($)
Oct. 21, 2025
USD ($)
ParticipantsAndBeneficiaries
Sep. 30, 2025
USD ($)
Nov. 30, 2025
USD ($)
Oct. 31, 2025
USD ($)
Oct. 01, 2025
USD ($)
KRIP [Member]              
Subsequent Event [Line Items]              
Pension obligations settled       $ 2,100      
Subsequent Event [Member]              
Subsequent Event [Line Items]              
Proceeds from Issuance of Debt   $ 200          
Subsequent Event [Member] | KRIP [Member]              
Subsequent Event [Line Items]              
Number of participants and beneficiaries | ParticipantsAndBeneficiaries     27,000        
Pension obligations settled     $ 1,800        
Subsequent Event [Member] | KRIP [Member] | Deferred Vested Participants [Member]              
Subsequent Event [Line Items]              
Pension liabilities             $ 76
Subsequent Event [Member] | KRIP [Member] | Active Participants [Member]              
Subsequent Event [Line Items]              
Pension liabilities           $ 157  
Subsequent Event [Member] | KRIP [Member] | Missing Participants [Member]              
Subsequent Event [Line Items]              
Pension liabilities         $ 15    
Subsequent Event [Member] | November 2025 Term Loan Credit Agreement Amendment [Member]              
Subsequent Event [Line Items]              
Debt instrument prepayment percentage   50.00%          
Debt instrument prepayment fee 4.00%