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Casualty, Environmental and Other Reserves - Narrative (Details) |  |  | 3 Months Ended |
--- | --- | --- | --- | ---
Jun. 01, 2021 USD ($) | May 31, 2021 USD ($) | Mar. 31, 2022 USD ($) claim site | Dec. 31, 2021 USD ($)
All Contingencies Reserves [Line Items] |  |  |  |
Total reserves |  |  | $ 385,000,000 | $ 368,000,000
Casualty |  |  |  |
All Contingencies Reserves [Line Items] |  |  |  |
Total reserves |  |  | 181,000,000 | 180,000,000
Self-insured retention amount, per occurrence | $ 100,000,000 | $ 75,000,000 | $ 100,000,000 |
Number of individual claims expected to exceed self insured retention amount | claim |  |  | 0 |
Environmental |  |  |  |
All Contingencies Reserves [Line Items] |  |  |  |
Total reserves |  |  | $ 128,000,000 | 108,000,000
Environmental impaired sites | site |  |  | 220 |
Other |  |  |  |
All Contingencies Reserves [Line Items] |  |  |  |
Total reserves |  |  | $ 76,000,000 | $ 80,000,000

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- Definition Total number of claims expected to exceed self-insured retention amount, as of the balance sheet date. + References No definition available. + Details
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Balance Type: | na
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- Definition Number of environmentally impaired sites at which the Company has been identified as a potentially responsible party. + References No definition available. + Details
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Namespace Prefix: | csx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Self insured retention amount for casualty and catastrophic property programs. + References No definition available. + Details
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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. + References No definition available. + Details
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- Definition Amount of loss contingency liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349 + Details
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- Details
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- Details
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Namespace Prefix: |
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- Details
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