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v3.25.0.1

Investments - Narrative (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 USD ($) railroad | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Schedule of Investments [Line Items] |  |  |
Borrowings against COLI policies | $ 605 | $ 0 |
Future payments for access fees due 2025 | 47 |  |
Future payments for access fees due 2026 | 47 |  |
Future payments for access fees due 2027 | 47 |  |
Future payments for access fees due 2028 | 47 |  |
Future payments for access fees, thereafter | 21 |  |
Long-term advances from investee | $ 1,760 | 1,839 |
Number of railroads | railroad | 6 |  |
Purchased services and rents | $ 2,048 | 2,070 | $ 1,922
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 |  |  |
Schedule of Investments [Line Items] |  |  |
Difference between investment and share of underlying net equity | $ 469 |  |
Expenses from transactions with related party | 198 | 164 | 156
General and administrative support to conrail, annual fees | 7 |  |
Due to conrail for the operation of shared assets areas | 243 | 198 |
Long-term advances from investee | $ 534 | 534 |
Long-term advances from investee, average interest rate | 1.31% |  |
Equity in earnings of investee | $ 89 | 70 | 58
TTX |  |  |
Schedule of Investments [Line Items] |  |  |
Equity method investment, ownership percentage | 19.78% |  |
Equity in earnings of investee | $ 48 | 47 | 53
Purchased services and rents | $ 295 | $ 274 | $ 256

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