XML 95 R85.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Related Party Transactions (Consolidated Income Statements Components) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 26, 2014 | Dec. 27, 2013 | Dec. 28, 2012
Related Party Amounts Consolidated Income Statements [Abstract] |  |  |
Equity earnings of Conrail | $ 0 us-gaap_IncomeLossFromEquityMethodInvestments | $ 0 us-gaap_IncomeLossFromEquityMethodInvestments | $ 0 us-gaap_IncomeLossFromEquityMethodInvestments
Corporate Joint Venture [Member] | Materials, Supplies and Other [Member] |  |  |
Related Party Amounts Consolidated Income Statements [Abstract] |  |  |
Rents, Fees and Services | 124 us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_IncomeStatementLocationAxis = us-gaap_OperatingExpenseMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_CorporateJointVentureMember | 115 us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_IncomeStatementLocationAxis = us-gaap_OperatingExpenseMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_CorporateJointVentureMember | 139 us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_IncomeStatementLocationAxis = us-gaap_OperatingExpenseMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_CorporateJointVentureMember
Purchase Price Amortization and Other | 4 csx_PurchasePriceAmortizationAndOther / us-gaap_IncomeStatementLocationAxis = us-gaap_OperatingExpenseMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_CorporateJointVentureMember | 4 csx_PurchasePriceAmortizationAndOther / us-gaap_IncomeStatementLocationAxis = us-gaap_OperatingExpenseMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_CorporateJointVentureMember | 4 csx_PurchasePriceAmortizationAndOther / us-gaap_IncomeStatementLocationAxis = us-gaap_OperatingExpenseMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_CorporateJointVentureMember
Equity earnings of Conrail | (31)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_IncomeStatementLocationAxis = us-gaap_OperatingExpenseMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_CorporateJointVentureMember | (35)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_IncomeStatementLocationAxis = us-gaap_OperatingExpenseMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_CorporateJointVentureMember | (26)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_IncomeStatementLocationAxis = us-gaap_OperatingExpenseMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_CorporateJointVentureMember
Total Conrail Rents, Fees and Services | $ 97 csx_TotalRelatedPartyRentsFeesAndServices / us-gaap_IncomeStatementLocationAxis = us-gaap_OperatingExpenseMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_CorporateJointVentureMember | $ 84 csx_TotalRelatedPartyRentsFeesAndServices / us-gaap_IncomeStatementLocationAxis = us-gaap_OperatingExpenseMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_CorporateJointVentureMember | $ 117 csx_TotalRelatedPartyRentsFeesAndServices / us-gaap_IncomeStatementLocationAxis = us-gaap_OperatingExpenseMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_CorporateJointVentureMember

X
- Definition The amortization of the fair value write-up of fixed assets when the original purchase price from the acquisition was allocated based on fair value. + References No definition available. + Details
Name: | csx_PurchasePriceAmortizationAndOther
Namespace Prefix: | csx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | csx_RelatedPartyAmountsConsolidatedIncomeStatementsAbstract
Namespace Prefix: | csx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Total amount of related party rents, fees and services in the Company's consolidated income statements. + References No definition available. + Details
Name: | csx_TotalRelatedPartyRentsFeesAndServices
Namespace Prefix: | csx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. + 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 SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35755396&loc=d3e33749-111570 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.12) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 7 + Details
Name: | us-gaap_IncomeLossFromEquityMethodInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 + Details
Name: | us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_CorporateJointVentureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |