$CSX
CSX CORP Stock $csx

$csx Overview Financials Valuation SEC Filings Company Website

2019 Q4 Form 10-K Financial Statement

#000027794820000008 Filed on February 12, 2020

Income Statement

Concept	2019 Q4	2018 Q4	2018 Q3
Revenue	$2.885B	$3.143B	$3.129B
YoY Change	-8.21%	9.78%	14.07%
Cost Of Revenue	$652.0M	$795.0M	$742.0M
YoY Change	-17.99%	1.53%	2.91%
Gross Profit	$2.233B	$2.348B	$2.387B
YoY Change	-4.9%	12.88%	18.05%
Gross Profit Margin	77.4%	74.71%	76.29%
Selling, General & Admin	$759.0M	$771.0M	$784.0M
YoY Change	-1.56%	-8.65%	-3.69%
% of Gross Profit	33.99%	32.84%	32.84%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$344.0M	$345.0M	$334.0M
YoY Change	-0.29%	2.37%	0.91%
% of Gross Profit	15.41%	14.69%	13.99%
Operating Expenses	$1.103B	$1.116B	$1.836B
YoY Change	-1.16%	-5.5%	-2.08%
Operating Profit	$1.154B	$1.249B	$1.293B
YoY Change	-7.61%	10.92%	48.96%
Interest Expense	-$165.0M	-$154.0M	-$162.0M
YoY Change	7.14%	-294.94%	-222.73%
% of Operating Profit	-14.3%	-12.33%	-12.53%
Other Income/Expense, Net	$16.00M	$20.00M	$19.00M
YoY Change	-20.0%	-41.18%	35.71%
Pretax Income	$981.0M	$1.098B	$1.150B
YoY Change	-10.66%	11.7%	53.33%
Income Tax	$210.0M	$255.0M	$256.0M
% Of Pretax Income	21.41%	23.22%	22.26%
Net Earnings	$771.0M	$843.0M	$894.0M
YoY Change	-8.54%	-79.64%	94.77%
Net Earnings / Revenue	26.72%	26.82%	28.57%
Basic Earnings Per Share	$0.99	$1.02	$1.05
Diluted Earnings Per Share	$0.99	$1.01	$1.05
COMMON SHARES
Basic Shares Outstanding			850.0M shares
Diluted Shares Outstanding			854.0M shares

Balance Sheet

Concept	2019 Q4	2018 Q4	2018 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.954B	$1.111B	$1.278B
YoY Change	75.88%	165.16%	81.53%
Cash & Equivalents	$958.0M	$858.0M	$663.0M
Short-Term Investments	$996.0M	$253.0M	$615.0M
Other Short-Term Assets	$77.00M	$181.0M	$133.0M
YoY Change	-57.46%	17.53%	40.0%
Inventory	$261.0M	$263.0M	$283.0M
Prepaid Expenses
Receivables	$986.0M	$1.010B	$1.090B
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$3.278B	$2.565B	$2.784B
YoY Change	27.8%	33.94%	28.18%
LONG-TERM ASSETS
Property, Plant & Equipment	$32.17B	$32.00B	$31.87B
YoY Change	0.53%	0.74%	0.92%
Goodwill	$63.00M
YoY Change
Intangibles	$0.00
YoY Change
Long-Term Investments	$1.879B	$1.779B	$1.764B
YoY Change	5.62%	5.52%	17.13%
Other Assets	$400.0M	$387.0M	$442.0M
YoY Change	3.36%	3.48%	39.87%
Total Long-Term Assets	$34.98B	$34.16B	$34.08B
YoY Change	2.39%	1.01%	2.02%
TOTAL ASSETS
Total Short-Term Assets	$3.278B	$2.565B	$2.784B
Total Long-Term Assets	$34.98B	$34.16B	$34.08B
Total Assets	$38.26B	$36.73B	$36.86B
YoY Change	4.16%	2.77%	3.62%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$1.043B	$949.0M	$982.0M
YoY Change	9.91%	12.04%	8.51%
Accrued Expenses	$546.0M	$550.0M	$517.0M
YoY Change	-0.73%	-8.64%	-13.98%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$245.0M	$18.00M	$18.00M
YoY Change	1261.11%	-5.26%	-5.26%
Total Short-Term Liabilities	$2.151B	$1.915B	$1.944B
YoY Change	12.32%	1.11%	-6.31%
LONG-TERM LIABILITIES
Long-Term Debt	$15.99B	$14.74B	$13.75B
YoY Change	8.51%	25.01%	16.68%
Other Long-Term Liabilities	$591.0M	$594.0M	$613.0M
YoY Change	-0.51%	-8.62%	-19.97%
Total Long-Term Liabilities	$591.0M	$594.0M	$613.0M
YoY Change	-0.51%	-8.62%	-19.97%
TOTAL LIABILITIES
Total Short-Term Liabilities	$2.151B	$1.915B	$1.944B
Total Long-Term Liabilities	$591.0M	$594.0M	$613.0M
Total Liabilities	$26.39B	$24.15B	$23.13B
YoY Change	9.3%	14.9%	-6.26%
SHAREHOLDERS EQUITY
Retained Earnings	$11.40B	$12.16B	$13.32B
YoY Change	-6.19%	-13.68%	28.98%
Common Stock	$1.119B	$1.067B	$973.0M
YoY Change	4.87%	-3.61%	-13.2%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$11.85B	$12.56B	$13.72B
YoY Change
Total Liabilities & Shareholders Equity	$38.26B	$36.73B	$36.86B
YoY Change	4.16%	2.77%	3.62%

Cashflow Statement

Concept	2019 Q4	2018 Q4	2018 Q3
OPERATING ACTIVITIES
Net Income	$771.0M	$843.0M	$894.0M
YoY Change	-8.54%	-79.64%	94.77%
Depreciation, Depletion And Amortization	$344.0M	$345.0M	$334.0M
YoY Change	-0.29%	2.37%	0.91%
Cash From Operating Activities	$1.113B	$1.235B	$1.397B
YoY Change	-9.88%	102.13%	7.88%
INVESTING ACTIVITIES
Capital Expenditures	-$466.0M	-$505.0M	-$417.0M
YoY Change	-7.72%	-12.63%	-17.75%
Acquisitions
YoY Change
Other Investing Activities	$93.00M	$408.0M	-$415.0M
YoY Change	-77.21%	151.85%	-205.06%
Cash From Investing Activities	-$373.0M	-$97.00M	-$832.0M
YoY Change	284.54%	-76.68%	642.86%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			$1.006B
YoY Change			0.6%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-1.303B	-943.0M	-1.222B
YoY Change	38.18%	144.94%	0.83%
NET CHANGE
Cash From Operating Activities	1.113B	1.235B	1.397B
Cash From Investing Activities	-373.0M	-97.00M	-832.0M
Cash From Financing Activities	-1.303B	-943.0M	-1.222B
Net Change In Cash	-563.0M	195.0M	-657.0M
YoY Change	-388.72%	-202.63%	2165.52%
FREE CASH FLOW
Cash From Operating Activities	$1.113B	$1.235B	$1.397B
Capital Expenditures	-$466.0M	-$505.0M	-$417.0M
Free Cash Flow	$1.579B	$1.740B	$1.814B
YoY Change	-9.25%	46.34%	0.67%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2018	csx	Defined Benefit Plan Service Cost Capitalized DefinedBenefitPlanServiceCostCapitalized	3000000	USD
CY2019	dei	Amendment Flag AmendmentFlag	false
CY2019	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2019	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2019	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
CY2019	dei	Entity Central Index Key EntityCentralIndexKey	0000277948
CY2017	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.78
CY2018	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.88
CY2019	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.96
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2017	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	0	USD
CY2018	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	0	USD
CY2019	dei	Document Type DocumentType	10-K
CY2019	dei	Document Annual Report DocumentAnnualReport	true
CY2019	dei	Document Period End Date DocumentPeriodEndDate	2019-12-31
CY2019	dei	Document Transition Report DocumentTransitionReport	false
CY2019	dei	Entity File Number EntityFileNumber	1-8022
CY2019	dei	Entity Registrant Name EntityRegistrantName	CSX CORPORATION
CY2019	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	VA
CY2019	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	62-1051971
CY2019	dei	Entity Address Address Line1 EntityAddressAddressLine1	500 Water Street
CY2019	dei	Entity Address Address Line2 EntityAddressAddressLine2	15th Floor
CY2019	dei	Entity Address City Or Town EntityAddressCityOrTown	Jacksonville
CY2019	dei	Entity Address State Or Province EntityAddressStateOrProvince	FL
CY2019	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	32202
CY2019	dei	City Area Code CityAreaCode	904
CY2019	dei	Local Phone Number LocalPhoneNumber	359-3200
CY2019	dei	Security12b Title Security12bTitle	Common Stock, $1 Par Value
CY2019	dei	Trading Symbol TradingSymbol	CSX
CY2019	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2019	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2019	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2019	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2019	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2019	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2019	dei	Entity Small Business EntitySmallBusiness	false
CY2019	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2019	dei	Entity Shell Company EntityShellCompany	false
CY2019Q2	dei	Entity Public Float EntityPublicFloat	59000000000	USD
CY2020Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	773825565	shares
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	11937000000	USD
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CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	11408000000	USD
CY2019	us-gaap	Labor And Related Expense LaborAndRelatedExpense	2616000000	USD
CY2018	us-gaap	Labor And Related Expense LaborAndRelatedExpense	2738000000	USD
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CY2017	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	2113000000	USD
CY2019	us-gaap	Depreciation Depreciation	1349000000	USD
CY2018	us-gaap	Depreciation Depreciation	1331000000	USD
CY2017	us-gaap	Depreciation Depreciation	1315000000	USD
CY2019	us-gaap	Fuel Costs FuelCosts	906000000	USD
CY2018	us-gaap	Fuel Costs FuelCosts	1046000000	USD
CY2017	us-gaap	Fuel Costs FuelCosts	864000000	USD
CY2019	csx	Equipmentand Other Rents EquipmentandOtherRents	408000000	USD
CY2018	csx	Equipmentand Other Rents EquipmentandOtherRents	395000000	USD
CY2017	csx	Equipmentand Other Rents EquipmentandOtherRents	429000000	USD
CY2019	us-gaap	Restructuring Charges RestructuringCharges	0	USD
CY2018	us-gaap	Restructuring Charges RestructuringCharges	0	USD
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CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	4965000000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	4869000000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	3720000000	USD
CY2019	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-737000000	USD
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CY2017	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-546000000	USD
CY2019	csx	Restructuring Charges Nonoperating RestructuringChargesNonoperating	0	USD
CY2018	csx	Restructuring Charges Nonoperating RestructuringChargesNonoperating	0	USD
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CY2018	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	74000000	USD
CY2017	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	53000000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	4316000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	4304000000	USD
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CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	985000000	USD
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CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	857000000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	911000000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	798000000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	861000000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	914000000	shares
CY2019	us-gaap	Net Income Loss NetIncomeLoss	3331000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	3309000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	5471000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-14000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-175000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	154000000	USD
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CY2019Q4	us-gaap	Minority Interest MinorityInterest	15000000	USD
CY2018Q4	us-gaap	Minority Interest MinorityInterest	17000000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	11863000000	USD
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CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	38257000000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	36729000000	USD
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CY2017	us-gaap	Net Income Loss NetIncomeLoss	5471000000	USD
CY2019	us-gaap	Depreciation Depreciation	1349000000	USD
CY2018	us-gaap	Depreciation Depreciation	1331000000	USD
CY2017	us-gaap	Depreciation Depreciation	1315000000	USD
CY2019	csx	Restructuring Charges Including Nonoperating Charges RestructuringChargesIncludingNonoperatingCharges	0	USD
CY2018	csx	Restructuring Charges Including Nonoperating Charges RestructuringChargesIncludingNonoperatingCharges	0	USD
CY2017	csx	Restructuring Charges Including Nonoperating Charges RestructuringChargesIncludingNonoperatingCharges	325000000	USD
CY2019	us-gaap	Payments For Restructuring PaymentsForRestructuring	0	USD
CY2018	us-gaap	Payments For Restructuring PaymentsForRestructuring	15000000	USD
CY2017	us-gaap	Payments For Restructuring PaymentsForRestructuring	187000000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	273000000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	279000000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-3233000000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	91000000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	96000000	USD
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	219000000	USD
CY2019	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	151000000	USD
CY2018	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	154000000	USD
CY2017	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	18000000	USD
CY2019	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	22000000	USD
CY2018	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-21000000	USD
CY2017	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-17000000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-45000000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	46000000	USD
CY2017	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	70000000	USD
CY2019	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-68000000	USD
CY2018	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-101000000	USD
CY2017	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-1000000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	98000000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	104000000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	41000000	USD
CY2019	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	2000000	USD
CY2018	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	-104000000	USD
CY2017	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	20000000	USD
CY2019	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	-96000000	USD
CY2018	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	-47000000	USD
CY2017	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	43000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	4850000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	4641000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	3472000000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1657000000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1745000000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2040000000	USD
CY2019	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	2838000000	USD
CY2018	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	736000000	USD
CY2017	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	782000000	USD
CY2019	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	2108000000	USD
CY2018	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	505000000	USD
CY2017	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	1193000000	USD
CY2019	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	254000000	USD
CY2018	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	319000000	USD
CY2017	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	97000000	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-31000000	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	27000000	USD
CY2017	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-37000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2102000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1684000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1495000000	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	2000000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	3000000000	USD
CY2017	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	850000000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	518000000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	19000000	USD
CY2017	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	333000000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	763000000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	751000000	USD
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	708000000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	3373000000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	4671000000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1970000000	USD
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	6000000	USD
CY2018	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-59000000	USD
CY2017	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-18000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-2648000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-2500000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-2179000000	USD
CY2019	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	100000000	USD
CY2018	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	457000000	USD
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-202000000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	858000000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	401000000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	603000000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	958000000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	858000000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	401000000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	717000000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	614000000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	555000000	USD
CY2019	us-gaap	Income Taxes Paid IncomeTaxesPaid	691000000	USD
CY2018	us-gaap	Income Taxes Paid IncomeTaxesPaid	814000000	USD
CY2017	us-gaap	Income Taxes Paid IncomeTaxesPaid	911000000	USD
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	11694000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	5471000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	154000000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	5625000000	USD
CY2017	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	708000000	USD
CY2017	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	1970000000	USD
CY2017	us-gaap	Stockholders Equity Other StockholdersEquityOther	-80000000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	14721000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	3309000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-175000000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	3134000000	USD
CY2019	csx	Cost Method Investment Maximum Percentage For Treatment CostMethodInvestmentMaximumPercentageForTreatment	0.20
CY2019	us-gaap	Fiscal Period FiscalPeriod	<div style="line-height:120%;text-align:justify;text-indent:48px;font-size:11pt;"><span style="font-family:Arial;font-size:11pt;">Through the second quarter 2017, CSX followed a 52/53 week fiscal reporting calendar with the last day of each reporting period ending on a Friday. On July 7, 2017, the Board of Directors of CSX approved a change in the fiscal reporting calendar from a 52/53 week year ending on the last Friday of December to a calendar year ending on December 31 each year, effective beginning with fiscal third quarter 2017. Related to the change in the fiscal calendar, 2019 and 2018 both contained 365 days while 2017 contained 366 days. </span></div><div style="line-height:120%;text-align:justify;font-size:11pt;"><span style="font-family:Arial;font-size:11pt;"><br/></span></div><div style="line-height:120%;text-align:justify;text-indent:48px;font-size:11pt;"><span style="font-family:Arial;font-size:11pt;">This change did not materially impact comparability of the Company’s financial results for fiscal year 2017. Accordingly, the change to a calendar fiscal year was made on a prospective basis and operating results for prior periods were not adjusted. The Company was not required to file a transition report because this change was not deemed a change in fiscal year for purposes of reporting subject to Rule 13a-10 or Rule 15d-10 of the Securities Exchange Act of 1934 as the new fiscal year commenced with the end of the prior fiscal year end. Except as otherwise specified, references to full years indicate CSX’s fiscal years ended on December 31, 2019, December 31, 2018 and December 31, 2017.</span></div>
CY2018	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	751000000	USD
CY2018	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	4671000000	USD
CY2018	us-gaap	Stockholders Equity Other StockholdersEquityOther	-147000000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	12580000000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	3331000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-14000000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	3317000000	USD
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	763000000	USD
CY2019	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	3373000000	USD
CY2019	us-gaap	Stockholders Equity Other StockholdersEquityOther	-102000000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	11863000000	USD
CY2019Q4	csx	Rail Route Network Distance RailRouteNetworkDistance	20000	mi
CY2019Q4	us-gaap	Number Of States In Which Entity Operates NumberOfStatesInWhichEntityOperates	23	state
CY2019Q4	csx	Number Of Ocean River And Lake Ports Serviced NumberOfOceanRiverAndLakePortsServiced	70	port_terminal
CY2019Q4	csx	Number Of Short Line And Regional Railroads Served NumberOfShortLineAndRegionalRailroadsServed	230	railroad
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	11900000000	USD
CY2019	csx	Number Of Primary Lines Of Business NumberOfPrimaryLinesOfBusiness	3	line_of_business
CY2019Q4	dei	Entity Number Of Employees EntityNumberOfEmployees	21000	employee
CY2019	csx	Number Of Union Employees NumberOfUnionEmployees	17000	employee
CY2019	us-gaap	Use Of Estimates UseOfEstimates	<div style="line-height:120%;text-align:justify;text-indent:48px;font-size:11pt;"><span style="font-family:Arial;font-size:11pt;">The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires that management make estimates in reporting the amounts of certain assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amount of certain revenues and expenses during the reporting period. Actual results may differ from those estimates. Critical accounting estimates using management judgment are made for the following areas:</span></div><div style="line-height:120%;text-align:justify;font-size:11pt;"><span style="font-family:Arial;font-size:11pt;"><br/></span></div><table cellpadding="0" cellspacing="0" style="padding-bottom:8px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:72px;"/><td/></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:11pt;padding-left:48px;"><span style="font-family:Arial;font-size:11pt;">•</span></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:justify;font-size:11pt;"><span style="font-family:Arial;font-size:11pt;">personal injury, environmental and legal reserves (see Note 5, </span><span style="font-family:Arial;font-size:11pt;font-style:italic;">Casualty, Environmental and Other Reserves</span><span style="font-family:Arial;font-size:11pt;">);</span></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-bottom:8px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:72px;"/><td/></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:11pt;padding-left:48px;"><span style="font-family:Arial;font-size:11pt;">•</span></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:justify;font-size:11pt;"><span style="font-family:Arial;font-size:11pt;">pension and post-retirement medical plan accounting (see Note 9, </span><span style="font-family:Arial;font-size:11pt;font-style:italic;">Employee Benefit Plans</span><span style="font-family:Arial;font-size:11pt;">); and</span></div></td></tr></table><div style="line-height:120%;font-size:11pt;padding-left:48px;"><span style="font-family:Arial;font-size:11pt;">•</span></div><div style="line-height:120%;text-align:justify;font-size:11pt;"><span style="font-family:Arial;font-size:11pt;">depreciation policies for assets under the group-life method (see Note 6, </span><span style="font-family:Arial;font-size:11pt;font-style:italic;">Properties</span><span style="font-family:Arial;font-size:11pt;">).</span></div>
CY2019	us-gaap	Net Income Loss NetIncomeLoss	3331000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	3309000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	5471000000	USD
CY2019	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	0	USD
CY2018	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	-1000000	USD
CY2017	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	-1000000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	3331000000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	3308000000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	5470000000	USD
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	796000000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	857000000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	911000000	shares
CY2019	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	2000000	shares
CY2018	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	4000000	shares
CY2017	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	3000000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	798000000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	861000000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	914000000	shares
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.18
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.86
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	6.01
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.17
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.84
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.99
CY2019	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	48000000	shares
CY2018	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	72000000	shares
CY2017	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	39000000	shares
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	3373000000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	4671000000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1970000000	USD
CY2019	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	70.54
CY2018	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	64.64
CY2017	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	50.80
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	74000000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	51000000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	89000000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	43000000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	26000000	USD
CY2017	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	42000000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	87000000	USD
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	45000000	USD
CY2016Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	374000000	USD
CY2017	us-gaap	Loss Contingency Accrual Provision LossContingencyAccrualProvision	114000000	USD
CY2017	us-gaap	Loss Contingency Accrual Payments LossContingencyAccrualPayments	114000000	USD
CY2017Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	374000000	USD
CY2018	us-gaap	Loss Contingency Accrual Provision LossContingencyAccrualProvision	72000000	USD
CY2018	us-gaap	Loss Contingency Accrual Payments LossContingencyAccrualPayments	122000000	USD
CY2018Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	324000000	USD
CY2019	us-gaap	Loss Contingency Accrual Provision LossContingencyAccrualProvision	107000000	USD
CY2019	us-gaap	Loss Contingency Accrual Payments LossContingencyAccrualPayments	126000000	USD
CY2019Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	305000000	USD
CY2019Q4	us-gaap	Loss Contingency Accrual Carrying Value Current LossContingencyAccrualCarryingValueCurrent	100000000	USD
CY2019Q4	us-gaap	Loss Contingency Accrual Carrying Value Noncurrent LossContingencyAccrualCarryingValueNoncurrent	205000000	USD
CY2019Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	305000000	USD
CY2018Q4	us-gaap	Loss Contingency Accrual Carrying Value Current LossContingencyAccrualCarryingValueCurrent	113000000	USD
CY2018Q4	us-gaap	Loss Contingency Accrual Carrying Value Noncurrent LossContingencyAccrualCarryingValueNoncurrent	211000000	USD
CY2018Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	324000000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	45100000000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	12932000000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	32168000000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	44805000000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	12807000000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	31998000000	USD
CY2019Q4	csx	Percentage Of Labor Cost Rail Installation Deconstruction Of Old Track PercentageOfLaborCostRailInstallationDeconstructionOfOldTrack	0.20
CY2019Q4	csx	Percentage Of Labor Cost Rail Installation Installation Of New Track PercentageOfLaborCostRailInstallationInstallationOfNewTrack	0.80
CY2019Q4	csx	Percentage Of Assets Depreciated Under Group Life Method PercentageOfAssetsDepreciatedUnderGroupLifeMethod	0.87
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	45100000000	USD
CY2019	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	151000000	USD
CY2018	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	154000000	USD
CY2017	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	18000000	USD
CY2019	us-gaap	Asset Impairment Charges AssetImpairmentCharges	22000000	USD
CY2018	us-gaap	Asset Impairment Charges AssetImpairmentCharges	24000000	USD
CY2017	us-gaap	Asset Impairment Charges AssetImpairmentCharges	25000000	USD
CY2018	csx	Numberof Milesof Rightof Way Leased NumberofMilesofRightofWayLeased	137	mi
CY2018Q4	us-gaap	Lessee Operating Lease Renewal Term LesseeOperatingLeaseRenewalTerm	P50Y
CY2018	csx	Operating Leases Annual Escalation Percentage OperatingLeasesAnnualEscalationPercentage	0.025
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	58000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	54000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	48000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	39000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	37000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	1208000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	1444000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	894000000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	550000000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	57000000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	493000000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	550000000	USD
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P33Y
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.050
CY2019Q1	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	534000000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	51000000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	60000000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	84000000	USD
CY2018	us-gaap	Operating Lease Cost OperatingLeaseCost	66000000	USD
CY2017	us-gaap	Operating Lease Cost OperatingLeaseCost	78000000	USD
CY2019	us-gaap	Cost Maintenance CostMaintenance	139000000	USD
CY2018	us-gaap	Cost Maintenance CostMaintenance	170000000	USD
CY2017	us-gaap	Cost Maintenance CostMaintenance	197000000	USD
CY2019	csx	Number Of Locomotives Under Long Term Maintenance Plan NumberOfLocomotivesUnderLongTermMaintenancePlan	1897	locomotive
CY2018	csx	Number Of Locomotives Under Long Term Maintenance Plan NumberOfLocomotivesUnderLongTermMaintenancePlan	1910	locomotive
CY2017	csx	Number Of Locomotives Under Long Term Maintenance Plan NumberOfLocomotivesUnderLongTermMaintenancePlan	2062	locomotive
CY2019Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On First Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary	292000000	USD
CY2019Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Second Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary	197000000	USD
CY2019Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Third Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary	229000000	USD
CY2019Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Fourth Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary	254000000	USD
CY2019Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Fifth Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary	290000000	USD
CY2019Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Due After Five Years UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears	2448000000	USD
CY2019Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance Sheet Amount UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount	3710000000	USD
CY2019Q4	csx	Casualty And Catastrophic Property Deductible CasualtyAndCatastrophicPropertyDeductible	50000000	USD
CY2019Q4	csx	Casualty And Non Catastrophic Property Deductible CasualtyAndNonCatastrophicPropertyDeductible	25000000	USD
CY2018	us-gaap	Defined Benefit Plan Plan Amendments DefinedBenefitPlanPlanAmendments	-102000000	USD
CY2019	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	0	USD
CY2019Q4	us-gaap	Defined Benefit Plan Expected Future Employer Contributions Next Fiscal Year DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear	0	USD
CY2019Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	2825000000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Weighted Average Asset Allocations DefinedBenefitPlanWeightedAverageAssetAllocations	1
CY2018Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	2431000000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Weighted Average Asset Allocations DefinedBenefitPlanWeightedAverageAssetAllocations	1
CY2019	csx	Defined Benefit Plan Service Cost Capitalized DefinedBenefitPlanServiceCostCapitalized	3000000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	2800000000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Pension Plan With Projected Benefit Obligation In Excess Of Plan Assets Plan Assets DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets	2715000000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Pension Plan With Projected Benefit Obligation In Excess Of Plan Assets Projected Benefit Obligation DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation	3037000000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Fair Value Of Plan Assets DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets	2715000000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Projected Benefit Obligation DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation	2878000000	USD
CY2017	csx	Defined Benefit Special Termination Benefits Curtailments DefinedBenefitSpecialTerminationBenefitsCurtailments	56000000	USD
CY2019	us-gaap	Multiemployer Plan Contributions By Employer MultiemployerPlanContributionsByEmployer	26000000	USD
CY2018	us-gaap	Multiemployer Plan Contributions By Employer MultiemployerPlanContributionsByEmployer	30000000	USD
CY2017	us-gaap	Multiemployer Plan Contributions By Employer MultiemployerPlanContributionsByEmployer	40000000	USD
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	41000000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	41000000	USD
CY2017	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	39000000	USD
CY2019Q4	us-gaap	Lessee Finance Lease Discount Rate LesseeFinanceLeaseDiscountRate	0.150
CY2019Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	4000000	USD
CY2019Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	16238000000	USD
CY2018Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	14757000000	USD
CY2019Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	245000000	USD
CY2018Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	18000000	USD
CY2019Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	15993000000	USD
CY2018Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	14739000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	245000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	401000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	162000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	639000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	551000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	14240000000	USD
CY2019Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	16238000000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	11937000000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	12250000000	USD
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	11408000000	USD
CY2019	csx	Contractwith Customer Timingof Satisfactionof Performance Obligation Payment Period ContractwithCustomerTimingofSatisfactionofPerformanceObligationPaymentPeriod	P15D
CY2019Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	986000000	USD
CY2018Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	1010000000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	4300000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	4300000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	3100000000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	608000000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	572000000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	787000000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	104000000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	144000000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	117000000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	712000000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	716000000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	904000000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	235000000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	275000000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-3277000000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	38000000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	4000000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	273000000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	44000000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	279000000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-3233000000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	985000000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	995000000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-2329000000	USD
CY2019	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	-77000000	USD
CY2018	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	-62000000	USD
CY2017Q4	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-3500000000	USD
CY2017Q4	csx	Effective Income Tax Rate Reconciliation Changein Enacted Tax Rate Amount Per Share EffectiveIncomeTaxRateReconciliationChangeinEnactedTaxRateAmountPerShare	-3.81
CY2018Q1	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2017	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	-21000000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	906000000	USD
CY2019	csx	Effective Income Tax Rate Reconciliation Federal Effective Rate Percent EffectiveIncomeTaxRateReconciliationFederalEffectiveRatePercent	0.210
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	904000000	USD
CY2018	csx	Effective Income Tax Rate Reconciliation Federal Effective Rate Percent EffectiveIncomeTaxRateReconciliationFederalEffectiveRatePercent	0.210
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	1100000000	USD
CY2017	csx	Effective Income Tax Rate Reconciliation Federal Effective Rate Percent EffectiveIncomeTaxRateReconciliationFederalEffectiveRatePercent	0.350
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	108000000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.025
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	112000000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.026
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	102000000	USD
CY2017	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.032
CY2019	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0
CY2018	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0
CY2017	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-3506000000	USD
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	-1.116
CY2019	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-29000000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.007
CY2018	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-21000000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.005
CY2017	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-25000000	USD
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.008
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	985000000	USD
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.228
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	995000000	USD
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.231
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-2329000000	USD
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.742
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	71000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	79000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	127000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	146000000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	7020000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	6799000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	426000000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	565000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	529000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	645000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	624000000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	7585000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	754000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	7444000000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	6961000000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	6690000000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	13000000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	12000000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	24000000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	10000000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	9000000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	19000000	USD
CY2019Q4	us-gaap	Income Tax Examination Liability Refund Adjustment From Settlement With Taxing Authority IncomeTaxExaminationLiabilityRefundAdjustmentFromSettlementWithTaxingAuthority	1000000	USD
CY2018Q4	us-gaap	Income Tax Examination Liability Refund Adjustment From Settlement With Taxing Authority IncomeTaxExaminationLiabilityRefundAdjustmentFromSettlementWithTaxingAuthority	-3000000	USD
CY2017Q4	us-gaap	Income Tax Examination Liability Refund Adjustment From Settlement With Taxing Authority IncomeTaxExaminationLiabilityRefundAdjustmentFromSettlementWithTaxingAuthority	3000000	USD
CY2019Q4	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	2000000	USD
CY2018Q4	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	2000000	USD
CY2017Q4	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	6000000	USD
CY2019Q4	csx	Defined Benefit Plan Fair Valueof Plan Assets Excluding Assets Measuredat Nav DefinedBenefitPlanFairValueofPlanAssetsExcludingAssetsMeasuredatNAV	1952000000	USD
CY2018Q4	csx	Defined Benefit Plan Fair Valueof Plan Assets Excluding Assets Measuredat Nav DefinedBenefitPlanFairValueofPlanAssetsExcludingAssetsMeasuredatNAV	1461000000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	2825000000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	2431000000	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-10000000	USD
CY2019	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	-43000000	USD
CY2018	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	-38000000	USD
CY2017	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	-32000000	USD
CY2019	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	48000000	USD
CY2018	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	32000000	USD
CY2017	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	13000000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-3000000	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	4000000	USD
CY2017	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	8000000	USD
CY2019	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	88000000	USD
CY2018	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	74000000	USD
CY2017	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	53000000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	3300000000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	3100000000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	5600000000	USD
CY2017	us-gaap	Oci Before Reclassifications Before Tax Attributable To Parent OciBeforeReclassificationsBeforeTaxAttributableToParent	161000000	USD
CY2017	us-gaap	Reclassification From Aoci Current Period Before Tax Attributable To Parent ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent	-58000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	65000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	154000000	USD
CY2018	us-gaap	Tax Cuts And Jobs Act Of2017 Reclassification From Aoci To Retained Earnings Tax Effect TaxCutsAndJobsActOf2017ReclassificationFromAociToRetainedEarningsTaxEffect	-107000000	USD
CY2018	us-gaap	Oci Before Reclassifications Before Tax Attributable To Parent OciBeforeReclassificationsBeforeTaxAttributableToParent	-119000000	USD
CY2018	us-gaap	Reclassification From Aoci Current Period Before Tax Attributable To Parent ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent	-32000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	-19000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-175000000	USD
CY2019	us-gaap	Oci Before Reclassifications Before Tax Attributable To Parent OciBeforeReclassificationsBeforeTaxAttributableToParent	-48000000	USD
CY2019	us-gaap	Reclassification From Aoci Current Period Before Tax Attributable To Parent ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent	-31000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	-3000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-14000000	USD
CY2019Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3013000000	USD
CY2019Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3061000000	USD
CY2019Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2978000000	USD
CY2019Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2885000000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	11937000000	USD
CY2019Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	1219000000	USD
CY2019Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	1305000000	USD
CY2019Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	1287000000	USD
CY2019Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	1154000000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	4965000000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	834000000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	870000000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	856000000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	771000000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	3331000000	USD
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.02
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.08
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.08
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.99
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.18
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.02
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.08
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.08
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.99
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.17
CY2018Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2876000000	USD
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CY2018Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3129000000	USD
CY2018Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3143000000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	12250000000	USD
CY2018Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	1044000000	USD
CY2018Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	1283000000	USD
CY2018Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	1293000000	USD
CY2018Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	1249000000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	4869000000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	695000000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	877000000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	894000000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	843000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	3309000000	USD
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.78
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.02
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CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.01
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.05
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.01
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.84
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CY2019	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	6972000000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	4965000000	USD
CY2019	us-gaap	Income Loss From Subsidiaries Before Tax IncomeLossFromSubsidiariesBeforeTax	0	USD
CY2019	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-737000000	USD
CY2019	csx	Other Nonoperating Income Expense Net OtherNonoperatingIncomeExpenseNet	88000000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	4316000000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	985000000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	3331000000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	3317000000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	12250000000	USD
CY2018	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	7381000000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	4869000000	USD
CY2018	us-gaap	Income Loss From Subsidiaries Before Tax IncomeLossFromSubsidiariesBeforeTax	0	USD
CY2018	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-639000000	USD
CY2018	csx	Other Nonoperating Income Expense Net OtherNonoperatingIncomeExpenseNet	74000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	4304000000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	995000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	3309000000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	3134000000	USD
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	11408000000	USD
CY2017	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	7688000000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	3720000000	USD
CY2017	us-gaap	Income Loss From Subsidiaries Before Tax IncomeLossFromSubsidiariesBeforeTax	0	USD
CY2017	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-546000000	USD
CY2017	csx	Other Nonoperating Income Expense Net OtherNonoperatingIncomeExpenseNet	-32000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	3142000000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-2329000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	5471000000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	5625000000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	958000000	USD
CY2019Q4	us-gaap	Short Term Investments ShortTermInvestments	996000000	USD
CY2019Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	986000000	USD
CY2019Q4	us-gaap	Due From Affiliate Current DueFromAffiliateCurrent	0	USD
CY2019Q4	us-gaap	Materials Supplies And Other MaterialsSuppliesAndOther	261000000	USD
CY2019Q4	us-gaap	Other Assets Current OtherAssetsCurrent	77000000	USD
CY2019Q4	us-gaap	Assets Current AssetsCurrent	3278000000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	45100000000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	12932000000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	32168000000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	532000000	USD
CY2019Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	400000000	USD
CY2019Q4	us-gaap	Assets Assets	38257000000	USD
CY2019Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	1043000000	USD
CY2019Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	489000000	USD
CY2019Q4	us-gaap	Due To Affiliate Current DueToAffiliateCurrent	0	USD
CY2019Q4	us-gaap	Loss Contingency Accrual Carrying Value Current LossContingencyAccrualCarryingValueCurrent	100000000	USD
CY2019Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	245000000	USD
CY2019Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	69000000	USD
CY2019Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	205000000	USD
CY2019Q4	us-gaap	Liabilities Current LiabilitiesCurrent	2151000000	USD
CY2019Q4	us-gaap	Loss Contingency Accrual Carrying Value Noncurrent LossContingencyAccrualCarryingValueNoncurrent	205000000	USD
CY2019Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	15993000000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	6961000000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	493000000	USD
CY2019Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	591000000	USD
CY2019Q4	us-gaap	Liabilities Liabilities	26394000000	USD
CY2019Q4	us-gaap	Common Stock Value CommonStockValue	773000000	USD
CY2019Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	346000000	USD
CY2019Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	11404000000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-675000000	USD
CY2019Q4	us-gaap	Minority Interest MinorityInterest	15000000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	11863000000	USD
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	38257000000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	858000000	USD
CY2018Q4	us-gaap	Short Term Investments ShortTermInvestments	253000000	USD
CY2018Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1010000000	USD
CY2018Q4	us-gaap	Due From Affiliate Current DueFromAffiliateCurrent	0	USD
CY2018Q4	us-gaap	Materials Supplies And Other MaterialsSuppliesAndOther	263000000	USD
CY2018Q4	us-gaap	Other Assets Current OtherAssetsCurrent	181000000	USD
CY2018Q4	us-gaap	Assets Current AssetsCurrent	2565000000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	44805000000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	12807000000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	31998000000	USD
CY2018Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	387000000	USD
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	6000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-2648000000	USD
CY2019	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	100000000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	858000000	USD
CY2018Q4	us-gaap	Assets Assets	36729000000	USD
CY2018Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	949000000	USD
CY2018Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	550000000	USD
CY2018Q4	us-gaap	Due To Affiliate Current DueToAffiliateCurrent	0	USD
CY2018Q4	us-gaap	Loss Contingency Accrual Carrying Value Current LossContingencyAccrualCarryingValueCurrent	113000000	USD
CY2018Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	18000000	USD
CY2018Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	106000000	USD
CY2018Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	179000000	USD
CY2018Q4	us-gaap	Liabilities Current LiabilitiesCurrent	1915000000	USD
CY2018Q4	us-gaap	Loss Contingency Accrual Carrying Value Noncurrent LossContingencyAccrualCarryingValueNoncurrent	211000000	USD
CY2018Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	14739000000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	6690000000	USD
CY2018Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	594000000	USD
CY2018Q4	us-gaap	Liabilities Liabilities	24149000000	USD
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	818000000	USD
CY2018Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	249000000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	12157000000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-661000000	USD
CY2018Q4	us-gaap	Minority Interest MinorityInterest	17000000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	12580000000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	36729000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	4850000000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1657000000	USD
CY2019	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	2838000000	USD
CY2019	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	2108000000	USD
CY2019	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	254000000	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-31000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2102000000	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	2000000000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	518000000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	763000000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	3373000000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	958000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	4641000000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1745000000	USD
CY2018	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	736000000	USD
CY2018	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	505000000	USD
CY2018	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	319000000	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	27000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1684000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	3000000000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	19000000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	751000000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	4671000000	USD
CY2018	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-59000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-2500000000	USD
CY2018	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	457000000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	401000000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	858000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	3472000000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2040000000	USD
CY2017	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	782000000	USD
CY2017	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	1193000000	USD
CY2017	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	97000000	USD
CY2017	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-37000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1495000000	USD
CY2017	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	850000000	USD
CY2017	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	333000000	USD
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	708000000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1970000000	USD
CY2017	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-18000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-2179000000	USD
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-202000000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	603000000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	401000000	USD

Files In Submission

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$CSX
CSX CORP Stock $csx

2019 Q4 Form 10-K Financial Statement

#000027794820000008 Filed on February 12, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CSX CSX CORP Stock $csx

2019 Q4 Form 10-K Financial Statement

#000027794820000008 Filed on February 12, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CSX
CSX CORP Stock $csx