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Note 16 - Related Parties (Details Textual) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Accounts Payable, Current	$ 894		$ 894		$ 784
UPRR [Member] | TTX Company [Member]
Accounts Payable, Current	$ 68		$ 68		68
TTX Company [Member] | UPRR [Member]
Equity Method Investment, Ownership Percentage	37.03%		37.03%
Equity Method Investments	$ 1,800		$ 1,800		$ 1,700
TTX Company [Member] | UPRR [Member] | Car Hire Expenses [Member]
Other Expenses	$ 102	$ 98	$ 205	$ 192

X

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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