XML 53 R40.htm IDEA: XBRL DOCUMENT
v3.21.2

Casualty, Environmental and Other Reserves - Narrative (Details) |  | 6 Months Ended |
--- | --- | --- | ---
Jun. 01, 2021 USD ($) | Jun. 30, 2021 USD ($) site claim | Dec. 31, 2020 USD ($)
All Contingencies Reserves [Line Items] |  |  |
Total reserves |  | $ 312,000,000 | $ 314,000,000
Casualty |  |  |
All Contingencies Reserves [Line Items] |  |  |
Total reserves |  | 191,000,000 | 196,000,000
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 |  | $ 77,000,000 | 76,000,000
Environmental impaired sites | site |  | 210 |
Other |  |  |
All Contingencies Reserves [Line Items] |  |  |
Total reserves |  | $ 44,000,000 | $ 42,000,000

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 No definition available. + 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://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
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: |