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v3.23.1

Investments (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2023 USD ($) railroad | Mar. 31, 2022 USD ($) | Dec. 31, 2022 USD ($)
Schedule of Investments [Line Items] |  |  |
Number of railroads | railroad | 7 |  |
Purchased services and rents | $ 496 | $ 437 |
Conrail, Economic |  |  |
Schedule of Investments [Line Items] |  |  |
Equity method investment, ownership percentage | 58.00% |  |
Conrail, Voting |  |  |
Schedule of Investments [Line Items] |  |  |
Equity method investment, ownership percentage | 50.00% |  |
Conrail Inc |  |  |
Schedule of Investments [Line Items] |  |  |
Equity method investments | $ 1,600 |  | $ 1,600
Expenses for operation of the Shared Assets Areas | 45 | 38 |
Equity in the earnings of investee | 16 | 14 |
Long-term advances, amount | $ 534 |  | $ 534
Long-term advances, average interest rate | 1.31% |  | 1.31%
TTX Company |  |  |
Schedule of Investments [Line Items] |  |  |
Equity method investment, ownership percentage | 19.78% |  |
Equity in the earnings of investee | $ 9 | 10 |
Purchased services and rents | $ 66 | $ 64 |

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- Definition The amount of expense for contract services provided to the Company and rent paid for freight cars owned by other railroads or private companies net of rents received, including lease expenses, primarily for locomotives, railcars, containers, and trailers. + References No definition available. + Details
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