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Note 14 - Debt - Schedule of Debt (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Debt Instrument $ 35,101  
Unamortized discount and deferred issuance costs (1,775) $ (1,763)
Total debt 33,326 29,729
Less: current portion (1,678) (2,166)
Total long-term debt 31,648 27,563
Notes Payable to Banks [Member]    
Debt Instrument 33,658 29,508
Equipment Trust Certificate [Member]    
Debt Instrument 809 848
Finance Lease [Member]    
Debt Instrument 234 336
Commercial Paper [Member]    
Debt Instrument 200 400
Secured Debt [Member]    
Debt Instrument 100 300
Loans Payable [Member]    
Debt Instrument $ 100 $ 100