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v2.4.1.9

Debt and Credit Agreements (Debt Issuance) (Details) (USD $) | 1 Months Ended
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Jul. 31, 2014
Debt Instrument [Line Items] |
Other expense recognized for early redemption premium | $ 16,000,000 us-gaap_GainsLossesOnExtinguishmentOfDebt
Early redemption amount | 663,000,000 us-gaap_ExtinguishmentOfDebtAmount
Notes Payable [Member] | Redeemable Notes Due 2024 [Member] |
Debt Instrument [Line Items] |
Face amount of debt issued | 550,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = csx_RedeemableNotesDue2024Member / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember
Notes issued, interest rate | 3.40%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = csx_RedeemableNotesDue2024Member / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember
Notes Payable [Member] | Redeemable Notes Due 2054 [Member] |
Debt Instrument [Line Items] |
Face amount of debt issued | 450,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = csx_RedeemableNotesDue2054Member / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember
Notes issued, interest rate | 4.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = csx_RedeemableNotesDue2054Member / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember
Notes Payable [Member] | Secured Equipment Notes Due October 15, 2014 [Member] |
Debt Instrument [Line Items] |
Face amount of debt issued | 263,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = csx_SecuredEquipmentNotesDueOctober152014Member / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember
Notes issued, interest rate | 8.375%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = csx_SecuredEquipmentNotesDueOctober152014Member / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember
Notes Payable [Member] | CSX's Notes Payable Maturing April 1, 2015 [Member] |
Debt Instrument [Line Items] |
Face amount of debt issued | $ 400,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = csx_CSXsNotesPayableMaturingApril12015Member / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember
Notes issued, interest rate | 6.25%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = csx_CSXsNotesPayableMaturingApril12015Member / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember

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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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

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- Definition Gross amount of debt extinguished. + References No definition available. + Details
Name: | us-gaap_ExtinguishmentOfDebtAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6850294&loc=d3e12317-112629 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6850294&loc=d3e12355-112629 + Details
Name: | us-gaap_GainsLossesOnExtinguishmentOfDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_NotesPayableOtherPayablesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |