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v3.25.2

Related Parties (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024
Related Party Transaction [Line Items] |  |  |  |  |
Equipment and other rents | $ 230 | $ 219 | $ 471 | $ 435 |
Accounts payable, current | 815 |  | 815 |  | $ 847
UPRR | Equity Method Investee |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Equipment and other rents | 109 | $ 107 | 221 | $ 209 |
Accounts payable, current | $ 71 |  | $ 71 |  | 70
UPRR | TTX Company |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Equity method investment, ownership percentage | 37.03% |  | 37.03% |  |
Equity method investments | $ 1,900 |  | $ 1,900 |  | $ 1,900

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