Note 11 - Accounts Payable and Other Current Liabilities - Schedule of Accounts Payable and Other Current Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Income and other taxes payable	$ 1,019	$ 685
Accounts payable	814	856
Compensation-related accruals	512	533
Current operating lease liabilities	322	355
Accrued casualty costs	306	307
Interest payable	238	389
Other	484	460
Total accounts payable and other current liabilities	3,801	3,683
Equipment [Member]
Equipment rents payable	$ 106	$ 98