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Segment Reporting and Significant Expenses- Schedule of Reconciliation of Segment Operating Income (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Segment Reporting Information [Line Items] |  |  |
Segment Operating Income | $ 1,041 | $ 1,337 | [1]
Revenue | 3,423 | 3,681 | [1]
Trucking Expenses and Eliminations | (2,382) | (2,344) | [1]
Operating Income | 1,041 | 1,337 | [1]
Interest Expense | (209) | (210) | [1]
Other Income - Net | 26 | 41 | [1]
Earnings Before Income Taxes | 858 | 1,168 | [1]
Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Segment Operating Income | 1,038 | 1,331 |
Operating Income | 1,038 | 1,331 |
Operating Segments | Rail Operations |  |  |
Segment Reporting Information [Line Items] |  |  |
Segment Operating Income | 1,038 | 1,331 |
Revenue | 3,221 | 3,466 |
Operating Income | 1,038 | 1,331 |
Operating Segments | Trucking Operating Segment |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue | 207 | 217 |
Trucking Expenses and Eliminations | (204) | (211) |
Eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue | (5) | (2) |
Trucking Expenses and Eliminations | 5 | 2 |
Eliminations | Trucking Operating Segment |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue | 202 | 215 |
Trucking Expenses and Eliminations | $ (199) | $ (209) |
[1] | See the 2024 annual report filed on Form 10-K for revision of prior period financial statements.

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