XML 90 R60.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Commitments and Contingencies (Insurance and Legal) (Details) (USD $) In Millions, unless otherwise specified | 1 Months Ended |
--- | --- | ---
May 31, 2007 entity | Dec. 26, 2014
Insurance |  |
Non-catastrophic property deductible |  | $ 25 csx_CasualtyAndNonCatastrophicPropertyDeductible
Casualty and catastrophic property deductible |  | 50 csx_CasualtyAndCatastrophicPropertyDeductible
Pending Litigation [Member] |  |
Loss Contingency, Estimate [Abstract] |  |
Minimum range of possible loss for legal proceedings |  | 4 us-gaap_LossContingencyRangeOfPossibleLossMinimum / us-gaap_LitigationStatusAxis = us-gaap_PendingLitigationMember
Maximum range of possible loss for legal proceedings |  | $ 13 us-gaap_LossContingencyRangeOfPossibleLossMaximum / us-gaap_LitigationStatusAxis = us-gaap_PendingLitigationMember
Fuel Surcharge Antitrust Litigation [Member] |  |
Loss Contingency, Estimate [Abstract] |  |
Number of other U.S.-based entities mentioned in class action lawsuit | 3 csx_LossContingencyClaimsFiledNumberOfEntities / us-gaap_LitigationCaseAxis = csx_FuelSurchargeAntitrustLitigationMember |

X
- Definition Deductible amount for casualty and catastrophic property programs. + References No definition available. + Details
Name: | csx_CasualtyAndCatastrophicPropertyDeductible
Namespace Prefix: | csx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Deductible amount for non-catastrophic property programs. + References No definition available. + Details
Name: | csx_CasualtyAndNonCatastrophicPropertyDeductible
Namespace Prefix: | csx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loss Contingency, Claims Filed, Number Of Entities + References No definition available. + Details
Name: | csx_LossContingencyClaimsFiledNumberOfEntities
Namespace Prefix: | csx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_InsuranceAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LossContingencyEstimateAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The estimated maximum amount of possible loss from the contingency. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349 + Details
Name: | us-gaap_LossContingencyRangeOfPossibleLossMaximum
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The estimated minimum amount of possible loss from the contingency. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349 + Details
Name: | us-gaap_LossContingencyRangeOfPossibleLossMinimum
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_LitigationCaseAxis=csx_FuelSurchargeAntitrustLitigationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LitigationStatusAxis=us-gaap_PendingLitigationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |