XML 52 R39.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

Casualty, Environmental and Other Reserves - Narrative (Details) |  | 3 Months Ended |
--- | --- | --- | ---
Jun. 01, 2021 USD ($) | Mar. 31, 2024 USD ($) site claim | Dec. 31, 2023 USD ($)
All Contingencies Reserves [Line Items] |  |  |
Total reserves |  | $ 448,000,000 | $ 440,000,000
Casualty |  |  |
All Contingencies Reserves [Line Items] |  |  |
Total reserves |  | 201,000,000 | 195,000,000
Self-insured retention amount, per occurrence | $ 100,000,000 | $ 100,000,000 |
Number of individual claims expected to exceed self insured retention amount | claim |  | 0 |
Environmental |  |  |
All Contingencies Reserves [Line Items] |  |  |
Total reserves |  | $ 154,000,000 | 154,000,000
Environmental impaired sites | site |  | 230 |
Other |  |  |
All Contingencies Reserves [Line Items] |  |  |
Total reserves |  | $ 93,000,000 | $ 91,000,000

X
- Definition Total number of claims expected to exceed self-insured retention amount, as of the balance sheet date. + References No definition available. + Details
Name: | csx_LossContingencyNumberOfClaimsExpectedToExceedSelfInsuredRetentionAmount
Namespace Prefix: | csx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of environmentally impaired sites at which the Company has been identified as a potentially responsible party. + References No definition available. + Details
Name: | csx_NumberOfImpairedSites
Namespace Prefix: | csx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Self insured retention amount for casualty and catastrophic property programs. + References No definition available. + Details
Name: | csx_SelfInsuredRetention
Namespace Prefix: | csx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482425/460-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483076/450-20-50-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483076/450-20-50-4 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483076/450-20-50-4 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483076/450-20-50-9 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483076/450-20-50-9 + Details
Name: | us-gaap_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483076/450-20-50-1 Reference 2: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483076/450-20-50-10 + Details
Name: | us-gaap_LossContingencyAccrualAtCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=csx_TotalCasualtyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=us-gaap_EnvironmentalIssueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=csx_OtherReservesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |