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Investments - Schedule of Investments (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Schedule of Investments [Line Items] |  |
Long-term investments: | $ 3,184 | $ 3,048
COLI at net cash surrender value | 161 | 774
Other investments | 25 | 17
Total long-term investments | 3,370 | 3,839
Conrail |  |
Schedule of Investments [Line Items] |  |
Long-term investments: | 1,748 | 1,656
TTX |  |
Schedule of Investments [Line Items] |  |
Long-term investments: | 1,013 | 964
Other |  |
Schedule of Investments [Line Items] |  |
Long-term investments: | $ 423 | $ 428

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