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

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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