Segment Reporting and Significant Expenses- Narrative (Details) $ in Millions |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
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Jun. 30, 2026
USD ($)
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Jun. 30, 2025
USD ($)
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Jun. 30, 2026
USD ($)
segment
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Jun. 30, 2025
USD ($)
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Dec. 31, 2025
USD ($)
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| Segment Reporting [Line Items] | |||||
| Number of operating segments | segment | 2 | ||||
| Number of reportable segments not disclosed flag | segments | ||||
| Assets | $ 44,726 | $ 44,726 | $ 43,682 | ||
| Rail Operations | |||||
| Segment Reporting [Line Items] | |||||
| Number of operating segments | segment | 1 | ||||
| Segment, expenditure, addition to long-lived assets | 561 | $ 766 | $ 1,098 | $ 1,457 | |
| Assets | $ 44,600 | $ 44,600 | $ 43,500 | ||
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- Definition NumberOfReportableSegmentsNotDisclosedFlag No definition available.
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- Definition Amount of asset recognized for present right to economic benefit. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of expenditure for addition to long-lived asset included in determination of segment asset by chief operating decision maker (CODM) or otherwise regularly provided to CODM. Long-lived asset excludes financial instrument, long-term customer relationship of financial institution, mortgage and other servicing rights, deferred policy acquisition cost, and deferred tax asset. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Details
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