Note 12 - Financial Instruments (Details Textual) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss, Current	$ 20	$ 16
Debt Instrument, Fair Value Disclosure	26,800	28,500
Fair Value of Total Debt Less of Carrying Value	5,100	4,100
Fair Value, Inputs, Level 2 [Member]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss, Current	$ 20	$ 16

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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+ Details