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v2.4.1.9

Summarized Consolidating Financial Data (Cash Flow Statements) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 26, 2014 | Dec. 27, 2013 | Dec. 28, 2012
Operating Activities |  |  |
Net Cash Provided by Operating Activities | $ 3,343 us-gaap_NetCashProvidedByUsedInOperatingActivities | $ 3,267 us-gaap_NetCashProvidedByUsedInOperatingActivities | $ 2,946 us-gaap_NetCashProvidedByUsedInOperatingActivities
Investing Activities |  |  |
Property Additions | (2,449)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | (2,313)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | (2,341)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Purchase of Short-term Investments | (1,433)us-gaap_PaymentsToAcquireShortTermInvestments | (1,256)us-gaap_PaymentsToAcquireShortTermInvestments | (633)us-gaap_PaymentsToAcquireShortTermInvestments
Proceeds from Sales of Short-term Investments | 1,674 us-gaap_ProceedsFromSaleOfShortTermInvestments | 1,401 us-gaap_ProceedsFromSaleOfShortTermInvestments | 581 us-gaap_ProceedsFromSaleOfShortTermInvestments
Proceeds from Property Dispositions | 62 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment | 53 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment | 186 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
Other Investing Activities | (37)us-gaap_PaymentsForProceedsFromOtherInvestingActivities | (112)us-gaap_PaymentsForProceedsFromOtherInvestingActivities | (70)us-gaap_PaymentsForProceedsFromOtherInvestingActivities
Net Cash Used in Investing Activities | (2,183)us-gaap_NetCashProvidedByUsedInInvestingActivities | (2,227)us-gaap_NetCashProvidedByUsedInInvestingActivities | (2,277)us-gaap_NetCashProvidedByUsedInInvestingActivities
Financing Activities |  |  |
Long-term Debt Issued | 1,000 us-gaap_ProceedsFromIssuanceOfLongTermDebt | 500 us-gaap_ProceedsFromIssuanceOfLongTermDebt | 1,100 us-gaap_ProceedsFromIssuanceOfLongTermDebt
Long-term Debt Repaid | (933)us-gaap_RepaymentsOfLongTermDebt | (780)us-gaap_RepaymentsOfLongTermDebt | (508)us-gaap_RepaymentsOfLongTermDebt
Payments of Ordinary Dividends, Common Stock | (629)us-gaap_PaymentsOfDividendsCommonStock | (600)us-gaap_PaymentsOfDividendsCommonStock | (558)us-gaap_PaymentsOfDividendsCommonStock
Stock Options Exercised | 0 us-gaap_ProceedsFromStockOptionsExercised | 9 us-gaap_ProceedsFromStockOptionsExercised | 14 us-gaap_ProceedsFromStockOptionsExercised
Shares acquired, repurchase amount | (517)us-gaap_PaymentsForRepurchaseOfCommonStock | (353)us-gaap_PaymentsForRepurchaseOfCommonStock | (734)us-gaap_PaymentsForRepurchaseOfCommonStock
Other Financing Activities | (4)us-gaap_ProceedsFromPaymentsForOtherFinancingActivities | (8)us-gaap_ProceedsFromPaymentsForOtherFinancingActivities | 18 us-gaap_ProceedsFromPaymentsForOtherFinancingActivities
Net Cash Used in Financing Activities | (1,083)us-gaap_NetCashProvidedByUsedInFinancingActivities | (1,232)us-gaap_NetCashProvidedByUsedInFinancingActivities | (668)us-gaap_NetCashProvidedByUsedInFinancingActivities
Net (Decrease) Increase in Cash and Cash Equivalents | 77 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | (192)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | 1 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and Cash Equivalents at Beginning of Period | 592 us-gaap_CashAndCashEquivalentsAtCarryingValue | 784 us-gaap_CashAndCashEquivalentsAtCarryingValue | 783 us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and Cash Equivalents at End of Period | 669 us-gaap_CashAndCashEquivalentsAtCarryingValue | 592 us-gaap_CashAndCashEquivalentsAtCarryingValue | 784 us-gaap_CashAndCashEquivalentsAtCarryingValue
CSX Corporation |  |  |
Operating Activities |  |  |
Net Cash Provided by Operating Activities | 583 us-gaap_NetCashProvidedByUsedInOperatingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 1,004 us-gaap_NetCashProvidedByUsedInOperatingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 579 us-gaap_NetCashProvidedByUsedInOperatingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Investing Activities |  |  |
Property Additions | 0 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Purchase of Short-term Investments | (1,419)us-gaap_PaymentsToAcquireShortTermInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (1,251)us-gaap_PaymentsToAcquireShortTermInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (605)us-gaap_PaymentsToAcquireShortTermInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Proceeds from Sales of Short-term Investments | 1,642 us-gaap_ProceedsFromSaleOfShortTermInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 1,335 us-gaap_ProceedsFromSaleOfShortTermInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 525 us-gaap_ProceedsFromSaleOfShortTermInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Proceeds from Property Dispositions | 0 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Other Investing Activities | 0 us-gaap_PaymentsForProceedsFromOtherInvestingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (134)us-gaap_PaymentsForProceedsFromOtherInvestingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (10)us-gaap_PaymentsForProceedsFromOtherInvestingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net Cash Used in Investing Activities | 223 us-gaap_NetCashProvidedByUsedInInvestingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (50)us-gaap_NetCashProvidedByUsedInInvestingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (90)us-gaap_NetCashProvidedByUsedInInvestingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Financing Activities |  |  |
Long-term Debt Issued | 1,000 us-gaap_ProceedsFromIssuanceOfLongTermDebt / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 500 us-gaap_ProceedsFromIssuanceOfLongTermDebt / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 1,100 us-gaap_ProceedsFromIssuanceOfLongTermDebt / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Long-term Debt Repaid | (600)us-gaap_RepaymentsOfLongTermDebt / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (700)us-gaap_RepaymentsOfLongTermDebt / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (400)us-gaap_RepaymentsOfLongTermDebt / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Payments of Ordinary Dividends, Common Stock | (629)us-gaap_PaymentsOfDividendsCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (600)us-gaap_PaymentsOfDividendsCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (558)us-gaap_PaymentsOfDividendsCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Stock Options Exercised | 0 us-gaap_ProceedsFromStockOptionsExercised / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 9 us-gaap_ProceedsFromStockOptionsExercised / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 14 us-gaap_ProceedsFromStockOptionsExercised / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Shares acquired, repurchase amount | (517)us-gaap_PaymentsForRepurchaseOfCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (353)us-gaap_PaymentsForRepurchaseOfCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (734)us-gaap_PaymentsForRepurchaseOfCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Other Financing Activities | 11 us-gaap_ProceedsFromPaymentsForOtherFinancingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 148 us-gaap_ProceedsFromPaymentsForOtherFinancingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 21 us-gaap_ProceedsFromPaymentsForOtherFinancingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net Cash Used in Financing Activities | (735)us-gaap_NetCashProvidedByUsedInFinancingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (996)us-gaap_NetCashProvidedByUsedInFinancingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (557)us-gaap_NetCashProvidedByUsedInFinancingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net (Decrease) Increase in Cash and Cash Equivalents | 71 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (42)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (68)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Cash and Cash Equivalents at Beginning of Period | 439 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 481 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 549 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Cash and Cash Equivalents at End of Period | 510 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 439 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 481 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
CSX Transportation |  |  |
Operating Activities |  |  |
Net Cash Provided by Operating Activities | 3,278 us-gaap_NetCashProvidedByUsedInOperatingActivities / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 3,005 us-gaap_NetCashProvidedByUsedInOperatingActivities / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 2,716 us-gaap_NetCashProvidedByUsedInOperatingActivities / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Investing Activities |  |  |
Property Additions | (2,192)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | (2,053)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | (2,104)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Purchase of Short-term Investments | 0 us-gaap_PaymentsToAcquireShortTermInvestments / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 0 us-gaap_PaymentsToAcquireShortTermInvestments / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 0 us-gaap_PaymentsToAcquireShortTermInvestments / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Proceeds from Sales of Short-term Investments | 0 us-gaap_ProceedsFromSaleOfShortTermInvestments / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 0 us-gaap_ProceedsFromSaleOfShortTermInvestments / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 0 us-gaap_ProceedsFromSaleOfShortTermInvestments / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Proceeds from Property Dispositions | 62 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 53 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 186 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Other Investing Activities | (128)us-gaap_PaymentsForProceedsFromOtherInvestingActivities / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | (315)us-gaap_PaymentsForProceedsFromOtherInvestingActivities / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 102 us-gaap_PaymentsForProceedsFromOtherInvestingActivities / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Net Cash Used in Investing Activities | (2,258)us-gaap_NetCashProvidedByUsedInInvestingActivities / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | (2,315)us-gaap_NetCashProvidedByUsedInInvestingActivities / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | (1,816)us-gaap_NetCashProvidedByUsedInInvestingActivities / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Financing Activities |  |  |
Long-term Debt Issued | 0 us-gaap_ProceedsFromIssuanceOfLongTermDebt / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 0 us-gaap_ProceedsFromIssuanceOfLongTermDebt / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 0 us-gaap_ProceedsFromIssuanceOfLongTermDebt / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Long-term Debt Repaid | (333)us-gaap_RepaymentsOfLongTermDebt / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | (80)us-gaap_RepaymentsOfLongTermDebt / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | (106)us-gaap_RepaymentsOfLongTermDebt / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Payments of Ordinary Dividends, Common Stock | (660)us-gaap_PaymentsOfDividendsCommonStock / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | (730)us-gaap_PaymentsOfDividendsCommonStock / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | (715)us-gaap_PaymentsOfDividendsCommonStock / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Stock Options Exercised | 0 us-gaap_ProceedsFromStockOptionsExercised / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 0 us-gaap_ProceedsFromStockOptionsExercised / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 0 us-gaap_ProceedsFromStockOptionsExercised / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Shares acquired, repurchase amount | 0 us-gaap_PaymentsForRepurchaseOfCommonStock / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 0 us-gaap_PaymentsForRepurchaseOfCommonStock / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 0 us-gaap_PaymentsForRepurchaseOfCommonStock / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Other Financing Activities | (18)us-gaap_ProceedsFromPaymentsForOtherFinancingActivities / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | (24)us-gaap_ProceedsFromPaymentsForOtherFinancingActivities / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 2 us-gaap_ProceedsFromPaymentsForOtherFinancingActivities / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Net Cash Used in Financing Activities | (1,011)us-gaap_NetCashProvidedByUsedInFinancingActivities / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | (834)us-gaap_NetCashProvidedByUsedInFinancingActivities / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | (819)us-gaap_NetCashProvidedByUsedInFinancingActivities / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Net (Decrease) Increase in Cash and Cash Equivalents | 9 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | (144)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 81 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Cash and Cash Equivalents at Beginning of Period | 91 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 235 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 154 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Cash and Cash Equivalents at End of Period | 100 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 91 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 235 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Eliminations and Other |  |  |
Operating Activities |  |  |
Net Cash Provided by Operating Activities | (518)us-gaap_NetCashProvidedByUsedInOperatingActivities / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | (742)us-gaap_NetCashProvidedByUsedInOperatingActivities / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | (349)us-gaap_NetCashProvidedByUsedInOperatingActivities / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember
Investing Activities |  |  |
Property Additions | (257)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | (260)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | (237)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember
Purchase of Short-term Investments | (14)us-gaap_PaymentsToAcquireShortTermInvestments / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | (5)us-gaap_PaymentsToAcquireShortTermInvestments / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | (28)us-gaap_PaymentsToAcquireShortTermInvestments / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember
Proceeds from Sales of Short-term Investments | 32 us-gaap_ProceedsFromSaleOfShortTermInvestments / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | 66 us-gaap_ProceedsFromSaleOfShortTermInvestments / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | 56 us-gaap_ProceedsFromSaleOfShortTermInvestments / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember
Proceeds from Property Dispositions | 0 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | 0 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | 0 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember
Other Investing Activities | 91 us-gaap_PaymentsForProceedsFromOtherInvestingActivities / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | 337 us-gaap_PaymentsForProceedsFromOtherInvestingActivities / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | (162)us-gaap_PaymentsForProceedsFromOtherInvestingActivities / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember
Net Cash Used in Investing Activities | (148)us-gaap_NetCashProvidedByUsedInInvestingActivities / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | 138 us-gaap_NetCashProvidedByUsedInInvestingActivities / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | (371)us-gaap_NetCashProvidedByUsedInInvestingActivities / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember
Financing Activities |  |  |
Long-term Debt Issued | 0 us-gaap_ProceedsFromIssuanceOfLongTermDebt / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | 0 us-gaap_ProceedsFromIssuanceOfLongTermDebt / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | 0 us-gaap_ProceedsFromIssuanceOfLongTermDebt / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember
Long-term Debt Repaid | 0 us-gaap_RepaymentsOfLongTermDebt / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | 0 us-gaap_RepaymentsOfLongTermDebt / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | (2)us-gaap_RepaymentsOfLongTermDebt / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember
Payments of Ordinary Dividends, Common Stock | 660 us-gaap_PaymentsOfDividendsCommonStock / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | 730 us-gaap_PaymentsOfDividendsCommonStock / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | 715 us-gaap_PaymentsOfDividendsCommonStock / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember
Stock Options Exercised | 0 us-gaap_ProceedsFromStockOptionsExercised / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | 0 us-gaap_ProceedsFromStockOptionsExercised / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | 0 us-gaap_ProceedsFromStockOptionsExercised / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember
Shares acquired, repurchase amount | 0 us-gaap_PaymentsForRepurchaseOfCommonStock / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | 0 us-gaap_PaymentsForRepurchaseOfCommonStock / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | 0 us-gaap_PaymentsForRepurchaseOfCommonStock / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember
Other Financing Activities | 3 us-gaap_ProceedsFromPaymentsForOtherFinancingActivities / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | (132)us-gaap_ProceedsFromPaymentsForOtherFinancingActivities / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | (5)us-gaap_ProceedsFromPaymentsForOtherFinancingActivities / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember
Net Cash Used in Financing Activities | 663 us-gaap_NetCashProvidedByUsedInFinancingActivities / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | 598 us-gaap_NetCashProvidedByUsedInFinancingActivities / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | 708 us-gaap_NetCashProvidedByUsedInFinancingActivities / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember
Net (Decrease) Increase in Cash and Cash Equivalents | (3)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | (6)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | (12)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember
Cash and Cash Equivalents at Beginning of Period | 62 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | 68 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | 80 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember
Cash and Cash Equivalents at End of Period | $ 59 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | $ 62 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember | $ 68 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = csx_ConsolidationEliminationsAndOtherEntitiesMember

X
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3044-108585 + Details
Name: | us-gaap_CashAndCashEquivalentsAtCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 230 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450594&loc=d3e33268-110906 + Details
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- Definition Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3574-108585 + Details
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- Definition Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3574-108585 + Details
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- Definition Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -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 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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- Definition The net cash outflow or inflow from other investing activities. This element is used when there is not a more specific and appropriate element in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3095-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3098-108585 + Details
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- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash outflow for securities or other assets acquired, which qualify for treatment as an investing activity and are to be liquidated, if necessary, within the current operating cycle. Includes cash flows from securities classified as trading securities that were acquired for reasons other than sale in the short-term. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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