Debt - Schedule of Unsecured, Fixed-Rate Debt Securities Under Our Shelf Registration (Details) - Unsecured Debt $ in Millions	Feb. 13, 2025 USD ($)
Unsecured Notes Due February 20, 2035
Debt Instrument [Line Items]
Fixed rate debt securities, principal amount	$ 1,000
Debt instrument, interest rate, stated percentage	5.10%
Unsecured Notes Due December 1, 2054
Debt Instrument [Line Items]
Fixed rate debt securities, principal amount	$ 1,000
Debt instrument, interest rate, stated percentage	5.60%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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UNION PACIFIC CORP 10-K