$CSX
CSX CORP Stock $csx

$csx Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-K Financial Statement

#000027794822000009 Filed on February 16, 2022

Income Statement

Concept	2021 Q4	2021 Q3	2021
Revenue	$3.427B	$3.292B	$12.52B
YoY Change	21.31%	24.32%	18.32%
Cost Of Revenue	$927.0M	$824.0M	$3.048B
YoY Change	58.73%	65.79%	36.99%
Gross Profit	$2.500B	$2.468B	$9.474B
YoY Change	11.56%	14.74%	13.35%
Gross Profit Margin	72.95%	74.97%	75.66%
Selling, General & Admin	$798.0M	$725.0M	$2.914B
YoY Change	17.53%	9.52%	11.52%
% of Gross Profit	31.92%	29.38%	30.76%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$360.0M	$367.0M	$1.400B
YoY Change	3.75%	5.46%	0.0%
% of Gross Profit	14.4%	14.87%	14.78%
Operating Expenses	$1.158B	$1.092B	$4.334B
YoY Change	12.87%	8.12%	8.46%
Operating Profit	$1.366B	$1.436B	$5.594B
YoY Change	12.43%	25.85%	28.24%
Interest Expense	-$180.0M	-$177.0M	$7.000M
YoY Change	-4.76%	-5.35%	-58.82%
% of Operating Profit	-13.18%	-12.33%	0.13%
Other Income/Expense, Net	$19.00M	$20.00M	$79.00M
YoY Change	-159.38%	42.86%	315.79%
Pretax Income	$1.205B	$1.279B	$5.000B
YoY Change	21.23%	32.13%	38.89%
Income Tax	$271.0M	$311.0M	$1.170B
% Of Pretax Income	22.49%	24.32%	23.4%
Net Earnings	$934.0M	$968.0M	$3.781B
YoY Change	22.89%	31.52%	36.75%
Net Earnings / Revenue	27.25%	29.4%	30.19%
Basic Earnings Per Share	$0.42	$0.43	$1.68
Diluted Earnings Per Share	$0.42	$0.43	$1.68
COMMON SHARES
Basic Shares Outstanding		2.237B shares	2.250B shares
Diluted Shares Outstanding		2.242B shares	2.255B shares

Balance Sheet

Concept	2021 Q4	2021 Q3	2021
SHORT-TERM ASSETS
Cash & Short-Term Investments	$2.316B	$2.179B	$2.316B
YoY Change	-26.03%	-24.84%	-26.03%
Cash & Equivalents	$2.239B	$2.179B	$2.239B
Short-Term Investments	$77.00M		$77.00M
Other Short-Term Assets	$70.00M	$89.00M	$70.00M
YoY Change	-27.08%	-7.29%	-27.08%
Inventory	$339.0M	$303.0M	$339.0M
Prepaid Expenses
Receivables	$1.148B	$1.326B	$1.148B
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$3.873B	$3.897B	$3.873B
YoY Change	-12.79%	-7.83%	-12.79%
LONG-TERM ASSETS
Property, Plant & Equipment	$33.02B	$32.81B	$33.52B
YoY Change	1.76%	1.34%	1.82%
Goodwill	$276.0M
YoY Change	338.1%
Intangibles	$175.0M
YoY Change
Long-Term Investments	$2.099B	$2.059B	$2.099B
YoY Change	5.74%	5.64%	5.74%
Other Assets	$592.0M	$400.0M	$592.0M
YoY Change	52.58%	3.9%	31.26%
Total Long-Term Assets	$36.66B	$36.23B	$36.66B
YoY Change	3.69%	2.89%	3.69%
TOTAL ASSETS
Total Short-Term Assets	$3.873B	$3.897B	$3.873B
Total Long-Term Assets	$36.66B	$36.23B	$36.66B
Total Assets	$40.53B	$40.13B	$40.53B
YoY Change	1.85%	1.74%	1.85%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$963.0M	$972.0M	$963.0M
YoY Change	19.04%	-6.72%	19.04%
Accrued Expenses	$630.0M	$548.0M	$694.0M
YoY Change	19.54%	25.69%	31.69%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$181.0M	$211.0M	$181.0M
YoY Change	-54.86%	-43.13%	-54.86%
Total Short-Term Liabilities	$2.233B	$2.268B	$2.233B
YoY Change	10.6%	-1.13%	10.6%
LONG-TERM LIABILITIES
Long-Term Debt	$16.19B	$16.18B	$16.19B
YoY Change	-0.73%	0.38%	-0.73%
Other Long-Term Liabilities	$502.0M	$475.0M	$1.230B
YoY Change	-2.14%	-11.05%	3.19%
Total Long-Term Liabilities	$502.0M	$475.0M	$17.42B
YoY Change	-2.14%	-11.05%	-0.46%
TOTAL LIABILITIES
Total Short-Term Liabilities	$2.233B	$2.268B	$2.233B
Total Long-Term Liabilities	$502.0M	$475.0M	$17.42B
Total Liabilities	$27.03B	$26.96B	$27.04B
YoY Change	1.3%	0.9%	1.31%
SHAREHOLDERS EQUITY
Retained Earnings	$11.63B	$11.46B
YoY Change	3.3%	-5.84%
Common Stock	$2.268B	$2.242B
YoY Change	-7.05%	92.45%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$13.49B	$13.16B	$13.49B
YoY Change
Total Liabilities & Shareholders Equity	$40.53B	$40.13B	$40.53B
YoY Change	1.85%	1.74%	1.85%

Cashflow Statement

Concept	2021 Q4	2021 Q3	2021
OPERATING ACTIVITIES
Net Income	$934.0M	$968.0M	$3.781B
YoY Change	22.89%	31.52%	36.75%
Depreciation, Depletion And Amortization	$360.0M	$367.0M	$1.400B
YoY Change	3.75%	5.46%	0.0%
Cash From Operating Activities	$1.280B	$1.420B	$5.099B
YoY Change	12.78%	50.42%	19.61%
INVESTING ACTIVITIES
Capital Expenditures	-$571.0M	-$466.0M	$1.791B
YoY Change	36.93%	14.22%	10.15%
Acquisitions			$541.0M
YoY Change
Other Investing Activities	$157.0M	-$470.0M	$4.000M
YoY Change	-502.56%	-315.6%	-94.81%
Cash From Investing Activities	-$414.0M	-$936.0M	-$1.877B
YoY Change	-9.21%	392.63%	189.21%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$1.064B	$2.886B
YoY Change		2116.67%	232.87%
Debt Paid & Issued, Net			$426.0M
YoY Change			-42.82%
Cash From Financing Activities	-806.0M	-1.291B	-$4.112B
YoY Change	79.91%	422.67%	184.96%
NET CHANGE
Cash From Operating Activities	1.280B	1.420B	$5.099B
Cash From Investing Activities	-414.0M	-936.0M	-$1.877B
Cash From Financing Activities	-806.0M	-1.291B	-$4.112B
Net Change In Cash	60.00M	-807.0M	-$890.0M
YoY Change	-74.03%	-259.17%	-140.99%
FREE CASH FLOW
Cash From Operating Activities	$1.280B	$1.420B	$5.099B
Capital Expenditures	-$571.0M	-$466.0M	$1.791B
Free Cash Flow	$1.851B	$1.886B	$3.308B
YoY Change	19.27%	39.5%	25.45%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021	dei	Entity Central Index Key EntityCentralIndexKey	0000277948
CY2021	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
CY2021	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2021	dei	Amendment Flag AmendmentFlag	false
CY2021Q4	us-gaap	Operating Lease Liability Current Statement Of Financial Position Extensible List OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#OtherLiabilitiesCurrent
CY2020Q4	us-gaap	Operating Lease Liability Current Statement Of Financial Position Extensible List OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#OtherLiabilitiesCurrent
CY2021Q4	us-gaap	Finance Lease Liability Statement Of Financial Position Extensible List FinanceLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#LongTermDebtAndCapitalLeaseObligations
CY2020Q4	us-gaap	Finance Lease Liability Statement Of Financial Position Extensible List FinanceLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#LongTermDebtAndCapitalLeaseObligations
CY2021	dei	Document Type DocumentType	10-K
CY2021	dei	Document Annual Report DocumentAnnualReport	true
CY2021	dei	Document Period End Date DocumentPeriodEndDate	2021-12-31
CY2021	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2021	dei	Document Transition Report DocumentTransitionReport	false
CY2021	dei	Entity File Number EntityFileNumber	1-8022
CY2021	dei	Entity Registrant Name EntityRegistrantName	CSX CORPORATION
CY2021	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	VA
CY2021	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	62-1051971
CY2021	dei	Entity Address Address Line1 EntityAddressAddressLine1	500 Water Street
CY2021	dei	Entity Address Address Line2 EntityAddressAddressLine2	15th Floor
CY2021	dei	Entity Address City Or Town EntityAddressCityOrTown	Jacksonville
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.39
CY2021	dei	Entity Address State Or Province EntityAddressStateOrProvince	FL
CY2021	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	32202
CY2021	dei	City Area Code CityAreaCode	904
CY2021	dei	Local Phone Number LocalPhoneNumber	359-3200
CY2021	dei	Security12b Title Security12bTitle	Common Stock, $1 Par Value
CY2021	dei	Trading Symbol TradingSymbol	CSX
CY2021	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2021	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2021	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2021	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2021	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2021	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2021	dei	Entity Small Business EntitySmallBusiness	false
CY2021	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2021	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2021	dei	Entity Shell Company EntityShellCompany	false
CY2021Q2	dei	Entity Public Float EntityPublicFloat	72000000000	USD
CY2022Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	2193389444	shares
CY2021	dei	Auditor Firm AuditorFirmId	42
CY2021	dei	Auditor Name AuditorName	Ernst & Young LLP
CY2021	dei	Auditor Location AuditorLocation	Jacksonville, Florida
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CY2020Q4	us-gaap	Common Stock Value CommonStockValue	2288000000	USD
CY2021Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	66000000	USD
CY2020Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	152000000	USD
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	11630000000	USD
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	11259000000	USD
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-408000000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-598000000	USD
CY2021Q4	us-gaap	Minority Interest MinorityInterest	10000000	USD
CY2020Q4	us-gaap	Minority Interest MinorityInterest	9000000	USD
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	13500000000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	13110000000	USD
CY2021Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	40531000000	USD
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	39793000000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	3781000000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	2765000000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	3331000000	USD
CY2021	us-gaap	Depreciation Depreciation	1420000000	USD
CY2020	us-gaap	Depreciation Depreciation	1383000000	USD
CY2019	us-gaap	Depreciation Depreciation	1349000000	USD
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	167000000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	180000000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	273000000	USD
CY2021	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	454000000	USD
CY2020	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	35000000	USD
CY2019	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	151000000	USD
CY2021	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	12000000	USD
CY2020	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-32000000	USD
CY2019	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-69000000	USD
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	141000000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-83000000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-45000000	USD
CY2021	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	25000000	USD
CY2020	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	75000000	USD
CY2019	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-68000000	USD
CY2021	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	128000000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-20000000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	98000000	USD
CY2021	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	72000000	USD
CY2020	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	39000000	USD
CY2019	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	2000000	USD
CY2021	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	139000000	USD
CY2020	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	-25000000	USD
CY2019	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	-96000000	USD
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	5099000000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	4263000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	4850000000	USD
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1791000000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1626000000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1657000000	USD
CY2021	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	75000000	USD
CY2020	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	426000000	USD
CY2019	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	2838000000	USD
CY2021	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	5000000	USD
CY2020	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	1424000000	USD
CY2019	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	2108000000	USD
CY2021	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	529000000	USD
CY2020	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	56000000	USD
CY2019	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	254000000	USD
CY2021	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	541000000	USD
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2021	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	4000000	USD
CY2020	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	77000000	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-31000000	USD
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1877000000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-649000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2102000000	USD
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2886000000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	867000000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	3373000000	USD
CY2021	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	839000000	USD
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	797000000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	763000000	USD
CY2021	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	426000000	USD
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	745000000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	518000000	USD
CY2021	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2020	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1000000000	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	2000000000	USD
CY2021	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	39000000	USD
CY2020	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-34000000	USD
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	6000000	USD
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-4112000000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-1443000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-2648000000	USD
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-890000000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	2171000000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	100000000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	3129000000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	958000000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	858000000	USD
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2239000000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	3129000000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	958000000	USD
CY2021	us-gaap	Interest Paid Net InterestPaidNet	718000000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	750000000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	717000000	USD
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	931000000	USD
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	664000000	USD
CY2019	us-gaap	Income Taxes Paid IncomeTaxesPaid	691000000	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	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.29
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
CY2020	us-gaap	Net Income Loss NetIncomeLoss	2765000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	77000000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	2842000000	USD
CY2021Q4	csx	Number Of Short Line And Regional Railroads Served NumberOfShortLineAndRegionalRailroadsServed	230	railroad
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	12500000000	USD
CY2021	csx	Number Of Primary Lines Of Business NumberOfPrimaryLinesOfBusiness	4	line_of_business
CY2020	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.35
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	797000000	USD
CY2020	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	867000000	USD
CY2020	us-gaap	Stockholders Equity Other StockholdersEquityOther	-69000000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	13110000000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	3781000000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	190000000	USD
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	3971000000	USD
CY2021	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.37
CY2021	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	839000000	USD
CY2021	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	2886000000	USD
CY2021	us-gaap	Stockholders Equity Other StockholdersEquityOther	-144000000	USD
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	13500000000	USD
CY2021Q4	csx	Rail Route Network Distance RailRouteNetworkDistance	19500	mi
CY2021Q4	us-gaap	Number Of States In Which Entity Operates NumberOfStatesInWhichEntityOperates	23	state
CY2021Q4	csx	Number Of Ocean River And Lake Ports Serviced NumberOfOceanRiverAndLakePortsServiced	70	port_terminal
CY2021Q4	dei	Entity Number Of Employees EntityNumberOfEmployees	20900	employee
CY2021	csx	Number Of Union Employees NumberOfUnionEmployees	16500	employee
CY2021Q2	us-gaap	Stockholders Equity Note Stock Split Conversion Ratio1 StockholdersEquityNoteStockSplitConversionRatio1	3
CY2021Q2	csx	Stockholders Equity Note Stock Split Number Of Additional Shares StockholdersEquityNoteStockSplitNumberOfAdditionalShares	2	shares
CY2021	us-gaap	Use Of Estimates UseOfEstimates	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:<div style="margin-top:3pt;padding-left:54pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:11pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:11pt;font-weight:400;line-height:120%;padding-left:14.15pt">personal injury and environmental reserves (see Note 5, </span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:11pt;font-style:italic;font-weight:400;line-height:120%">Casualty, Environmental and Other Reserves</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:11pt;font-weight:400;line-height:120%">);</span></div><div style="margin-top:3pt;padding-left:54pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:11pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:11pt;font-weight:400;line-height:120%;padding-left:14.15pt">pension and post-retirement medical plan accounting (see Note 9, </span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:11pt;font-style:italic;font-weight:400;line-height:120%">Employee Benefit Plans</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:11pt;font-weight:400;line-height:120%">);</span></div><div style="margin-top:3pt;padding-left:54pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:11pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:11pt;font-weight:400;line-height:120%;padding-left:14.15pt">depreciation policies for assets under the group-life method (see Note 6, </span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:11pt;font-style:italic;font-weight:400;line-height:120%">Properties</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:11pt;font-weight:400;line-height:120%">); and</span></div><div style="margin-top:3pt;padding-left:54pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:11pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:11pt;font-weight:400;line-height:120%;padding-left:14.15pt">goodwill and other intangible assets (see Note 17, </span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:11pt;font-style:italic;font-weight:400;line-height:120%">Business Combinations</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:11pt;font-weight:400;line-height:120%"> and Note 18, </span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:11pt;font-style:italic;font-weight:400;line-height:120%">Goodwill and Other Intangibles - Net</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:11pt;font-weight:400;line-height:120%">).</span></div>
CY2021	us-gaap	Fiscal Period FiscalPeriod	The Company's fiscal periods are based upon the calendar year. Except as otherwise specified, references to full years indicate CSX’s fiscal years ended on December 31, 2021, December 31, 2020, and December 31, 2019.
CY2021	csx	Cost Method Investment Maximum Percentage For Treatment CostMethodInvestmentMaximumPercentageForTreatment	0.20
CY2021	us-gaap	Net Income Loss NetIncomeLoss	3781000000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	2765000000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	3331000000	USD
CY2021	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	0	USD
CY2020	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	0	USD
CY2019	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	0	USD
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	3781000000	USD
CY2020	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	22.90
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	5400000000	shares
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	2202000000	shares
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	2765000000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	3331000000	USD
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	2250000000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	2300000000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	2389000000	shares
CY2021	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	5000000	shares
CY2020	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	5000000	shares
CY2019	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	6000000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	2255000000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	2305000000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	2395000000	shares
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.68
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.20
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.39
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.68
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.20
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.39
CY2019	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	23.51
CY2021Q4	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	3000000000	USD
CY2021	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	90000000	shares
CY2020	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	38000000	shares
CY2019	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	144000000	shares
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2886000000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	867000000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	3373000000	USD
CY2021	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	31.91
CY2021Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	25000000	shares
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	2202000000	shares
CY2021Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2021Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2021	csx	Common Stock Votes Per Share CommonStockVotesPerShare	1
CY2021Q2	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	0	USD
CY2021Q2	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	0	USD
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	107000000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	29000000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	74000000	USD
CY2021	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	23000000	USD
CY2020	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	19000000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	43000000	USD
CY2020Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares	12652000	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	20.29
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	2005000	shares
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	29.69
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Options Forfeited Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedNumberOfShares	174000	shares
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	26.91
CY2021	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	1971000	shares
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	15.76
CY2021Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares	12512000	shares
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	22.42
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P7Y2M12D
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	190000000	USD
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	6347000	shares
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	18.16
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P6Y1M6D
CY2021Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	123000000	USD
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	32000000	USD
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	30000000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	87000000	USD
CY2021	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	31000000	USD
CY2020	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	29000000	USD
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	45000000	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
CY2020	us-gaap	Loss Contingency Accrual Provision LossContingencyAccrualProvision	107000000	USD
CY2020	us-gaap	Loss Contingency Accrual Payments LossContingencyAccrualPayments	98000000	USD
CY2020Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	314000000	USD
CY2021	csx	Loss Contingency Accrual Acquired In Business Combination LossContingencyAccrualAcquiredInBusinessCombination	62000000	USD
CY2021	us-gaap	Loss Contingency Accrual Provision LossContingencyAccrualProvision	130000000	USD
CY2021	us-gaap	Loss Contingency Accrual Payments LossContingencyAccrualPayments	138000000	USD
CY2021Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	368000000	USD
CY2021Q4	us-gaap	Loss Contingency Accrual Carrying Value Current LossContingencyAccrualCarryingValueCurrent	118000000	USD
CY2021Q4	us-gaap	Loss Contingency Accrual Carrying Value Noncurrent LossContingencyAccrualCarryingValueNoncurrent	250000000	USD
CY2021Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	368000000	USD
CY2020Q4	us-gaap	Loss Contingency Accrual Carrying Value Current LossContingencyAccrualCarryingValueCurrent	90000000	USD
CY2020Q4	us-gaap	Loss Contingency Accrual Carrying Value Noncurrent LossContingencyAccrualCarryingValueNoncurrent	224000000	USD
CY2020Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	314000000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	46505000000	USD
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	13490000000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	33015000000	USD
CY2021	us-gaap	Asset Impairment Charges AssetImpairmentCharges	2000000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	45530000000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	13086000000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	32444000000	USD
CY2021Q4	csx	Percentage Of Labor Cost Rail Installation Deconstruction Of Old Track PercentageOfLaborCostRailInstallationDeconstructionOfOldTrack	0.20
CY2021Q4	csx	Percentage Of Labor Cost Rail Installation Installation Of New Track PercentageOfLaborCostRailInstallationInstallationOfNewTrack	0.80
CY2021Q4	csx	Percentage Of Assets Depreciated Under Group Life Method PercentageOfAssetsDepreciatedUnderGroupLifeMethod	0.86
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	46500000000	USD
CY2021	us-gaap	Depreciation Depreciation	1400000000	USD
CY2020	us-gaap	Depreciation Depreciation	1400000000	USD
CY2019	us-gaap	Depreciation Depreciation	1300000000	USD
CY2021	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	454000000	USD
CY2020	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	35000000	USD
CY2019	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	151000000	USD
CY2019	us-gaap	Asset Impairment Charges AssetImpairmentCharges	8000000	USD
CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	22000000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	66000000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	55000000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	45000000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	40000000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	31000000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	1153000000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	1390000000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	848000000	USD
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	542000000	USD
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	501000000	USD
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	501000000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	472000000	USD
CY2021Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	64000000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	45000000	USD
CY2021Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	478000000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	455000000	USD
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	542000000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	500000000	USD
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P32Y
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P35Y
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.049
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.050
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	472000000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	11000000	USD
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	60000000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	59000000	USD
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	89000000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	82000000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	84000000	USD
CY2021	us-gaap	Cost Maintenance CostMaintenance	99000000	USD
CY2020	us-gaap	Cost Maintenance CostMaintenance	158000000	USD
CY2019	us-gaap	Cost Maintenance CostMaintenance	139000000	USD
CY2021	csx	Number Of Locomotives Under Long Term Maintenance Plan NumberOfLocomotivesUnderLongTermMaintenancePlan	1863	locomotive
CY2021	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	0	USD
CY2019	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	0	USD
CY2020	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	0	USD
CY2021Q4	us-gaap	Defined Benefit Plan Expected Future Employer Contributions Next Fiscal Year DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear	0	USD
CY2020	csx	Number Of Locomotives Under Long Term Maintenance Plan NumberOfLocomotivesUnderLongTermMaintenancePlan	1874	locomotive
CY2019	csx	Number Of Locomotives Under Long Term Maintenance Plan NumberOfLocomotivesUnderLongTermMaintenancePlan	1897	locomotive
CY2021Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On First Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary	250000000	USD
CY2021Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Second Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary	266000000	USD
CY2021Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Third Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary	304000000	USD
CY2021Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Fourth Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary	318000000	USD
CY2021Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Fifth Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary	231000000	USD
CY2021Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Due After Five Years UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears	1724000000	USD
CY2021Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance Sheet Amount UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount	3093000000	USD
CY2021Q4	csx	Casualty And Non Catastrophic Property Deductible CasualtyAndNonCatastrophicPropertyDeductible	100000000	USD
CY2021Q4	csx	Casualty And Catastrophic Property Deductible CasualtyAndCatastrophicPropertyDeductible	75000000	USD
CY2021	csx	Percentage Within Which Plan Assets Investment Are Managed PercentageWithinWhichPlanAssetsInvestmentAreManaged	0.05
CY2021Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	3016000000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Weighted Average Asset Allocations DefinedBenefitPlanWeightedAverageAssetAllocations	1
CY2020Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	3000000000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Weighted Average Asset Allocations DefinedBenefitPlanWeightedAverageAssetAllocations	1
CY2021	csx	Defined Benefit Plan Service Cost Capitalized DefinedBenefitPlanServiceCostCapitalized	4000000	USD
CY2020	csx	Defined Benefit Plan Service Cost Capitalized DefinedBenefitPlanServiceCostCapitalized	3000000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	3000000000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Pension Plan With Projected Benefit Obligation In Excess Of Plan Assets Plan Assets DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets	0	USD
CY2021Q4	us-gaap	Defined Benefit Plan Pension Plan With Projected Benefit Obligation In Excess Of Plan Assets Projected Benefit Obligation DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation	261000000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Fair Value Of Plan Assets DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets	0	USD
CY2021Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Projected Benefit Obligation DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation	249000000	USD
CY2021Q4	us-gaap	Lessee Finance Lease Discount Rate LesseeFinanceLeaseDiscountRate	0.061
CY2021Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	47000000	USD
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	3000000	USD
CY2021Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	16366000000	USD
CY2020Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	16705000000	USD
CY2021Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	181000000	USD
CY2020Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	401000000	USD
CY2021Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	16185000000	USD
CY2020Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	16304000000	USD
CY2021Q4	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	0	USD
CY2021Q4	csx	Long Term Debt And Finance Lease Maturity Year One LongTermDebtAndFinanceLeaseMaturityYearOne	181000000	USD
CY2021Q4	csx	Long Term Debt And Finance Lease Maturity Year Two LongTermDebtAndFinanceLeaseMaturityYearTwo	153000000	USD
CY2021Q4	csx	Long Term Debt And Finance Lease Maturity Year Three LongTermDebtAndFinanceLeaseMaturityYearThree	560000000	USD
CY2021Q4	csx	Long Term Debt And Finance Lease Maturity Year Four LongTermDebtAndFinanceLeaseMaturityYearFour	605000000	USD
CY2021Q4	csx	Long Term Debt And Finance Lease Maturity Year Five LongTermDebtAndFinanceLeaseMaturityYearFive	704000000	USD
CY2021Q4	csx	Long Term Debt And Finance Lease Maturity After Year Five LongTermDebtAndFinanceLeaseMaturityAfterYearFive	14163000000	USD
CY2021Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	16366000000	USD
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	12522000000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	10583000000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	11937000000	USD
CY2021	csx	Contract With Customer Timing Of Satisfaction Of Performance Obligation Payment Period ContractWithCustomerTimingOfSatisfactionOfPerformanceObligationPaymentPeriod	P15D
CY2021	us-gaap	Revenue Performance Obligation Description Of Timing RevenuePerformanceObligationDescriptionOfTiming	The Company expects to recognize the unearned portion of revenue for freight services in transit within one week of the reporting date.
CY2021Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	1148000000	USD
CY2020Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	912000000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	5000000000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	3600000000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	4300000000	USD
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	827000000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	559000000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	608000000	USD
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	176000000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	123000000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	104000000	USD
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1003000000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	682000000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	712000000	USD
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	166000000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	149000000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	235000000	USD
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	1000000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	31000000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	38000000	USD
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	167000000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	180000000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	273000000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1170000000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	862000000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	985000000	USD
CY2021	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	-48000000	USD
CY2020	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	-30000000	USD
CY2019	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	-77000000	USD
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	1040000000	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	762000000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	906000000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	139000000	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.028
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	117000000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.032
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
CY2021	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-9000000	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.002
CY2020	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-17000000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.004
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
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1170000000	USD
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.236
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	862000000	USD
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.238
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	985000000	USD
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.228
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	2000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	62000000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	106000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	96000000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	7366000000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	7195000000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	497000000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	622000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	320000000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	451000000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	605000000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	7988000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	478000000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	7646000000	USD
CY2021Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	7383000000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	7168000000	USD
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	18000000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	16000000	USD
CY2021Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	15000000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	13000000	USD
CY2019	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	-43000000	USD
CY2021	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	-64000000	USD
CY2020	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	-42000000	USD
CY2021	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	7000000	USD
CY2020	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	17000000	USD
CY2019	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	48000000	USD
CY2021	us-gaap	Gain Loss On Repurchase Of Debt Instrument GainLossOnRepurchaseOfDebtInstrument	0	USD
CY2020	us-gaap	Gain Loss On Repurchase Of Debt Instrument GainLossOnRepurchaseOfDebtInstrument	-48000000	USD
CY2019	us-gaap	Gain Loss On Repurchase Of Debt Instrument GainLossOnRepurchaseOfDebtInstrument	-10000000	USD
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	8000000	USD
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	8000000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	7000000	USD
CY2021	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	79000000	USD
CY2020	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	19000000	USD
CY2019	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	88000000	USD
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	4000000000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	2800000000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	3300000000	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
CY2020	us-gaap	Oci Before Reclassifications Before Tax Attributable To Parent OciBeforeReclassificationsBeforeTaxAttributableToParent	53000000	USD
CY2020	us-gaap	Reclassification From Aoci Current Period Before Tax Attributable To Parent ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent	-52000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	28000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	77000000	USD
CY2021	us-gaap	Oci Before Reclassifications Before Tax Attributable To Parent OciBeforeReclassificationsBeforeTaxAttributableToParent	158000000	USD
CY2021	us-gaap	Reclassification From Aoci Current Period Before Tax Attributable To Parent ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent	-81000000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	49000000	USD
CY2020	us-gaap	Finitelived Intangible Assets Acquired1 FinitelivedIntangibleAssetsAcquired1	0	USD
CY2020	us-gaap	Finitelived Intangible Assets Acquired1 FinitelivedIntangibleAssetsAcquired1	0	USD
CY2020	csx	Finite Lived Intangible Assets Acquired Including Goodwill FiniteLivedIntangibleAssetsAcquiredIncludingGoodwill	0	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	0	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	0	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	0	USD
CY2020Q4	us-gaap	Goodwill Goodwill	63000000	USD
CY2020Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	0	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	190000000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	63000000	USD
CY2019Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	0	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	0	USD
CY2019Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	0	USD
CY2019Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	63000000	USD
CY2020	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	0	USD
CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	0	USD
CY2020Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	63000000	USD
CY2021	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	213000000	USD
CY2021	us-gaap	Finitelived Intangible Assets Acquired1 FinitelivedIntangibleAssetsAcquired1	180000000	USD
CY2021	us-gaap	Finitelived Intangible Assets Acquired1 FinitelivedIntangibleAssetsAcquired1	180000000	USD
CY2021	csx	Finite Lived Intangible Assets Acquired Including Goodwill FiniteLivedIntangibleAssetsAcquiredIncludingGoodwill	393000000	USD
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	5000000	USD
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	5000000	USD
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	5000000	USD
CY2021Q4	us-gaap	Goodwill Goodwill	276000000	USD
CY2021Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	180000000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	5000000	USD
CY2021Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	175000000	USD
CY2021Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	451000000	USD
CY2021Q2	us-gaap	Stockholders Equity Note Stock Split Conversion Ratio1 StockholdersEquityNoteStockSplitConversionRatio1	3
CY2021Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2813000000	USD
CY2021Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2990000000	USD
CY2021Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3292000000	USD
CY2021Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3427000000	USD
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	12522000000	USD
CY2021Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	1101000000	USD
CY2021Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	1691000000	USD
CY2021Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	1436000000	USD
CY2021Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	1366000000	USD
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	5594000000	USD
CY2021Q1	us-gaap	Net Income Loss NetIncomeLoss	706000000	USD
CY2021Q2	us-gaap	Net Income Loss NetIncomeLoss	1173000000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	968000000	USD
CY2021Q4	us-gaap	Net Income Loss NetIncomeLoss	934000000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	3781000000	USD
CY2021Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.31
CY2021Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.52
CY2021Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.43
CY2021Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.42
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.68
CY2021Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.31
CY2021Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.52
CY2021Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.43
CY2021Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.42
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.68
CY2020Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2855000000	USD
CY2020Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2255000000	USD
CY2020Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2648000000	USD
CY2020Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2825000000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	10583000000	USD
CY2020Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	1178000000	USD
CY2020Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	828000000	USD
CY2020Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	1141000000	USD
CY2020Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	1215000000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	4362000000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	770000000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	499000000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	736000000	USD
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	760000000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	2765000000	USD
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.33
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.22
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.32
CY2020Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.33
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.20
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.33
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.22
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.32
CY2020Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.33
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.20

Files In Submission

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$CSX
CSX CORP Stock $csx

2021 Q4 Form 10-K Financial Statement

#000027794822000009 Filed on February 16, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CSX CSX CORP Stock $csx

2021 Q4 Form 10-K Financial Statement

#000027794822000009 Filed on February 16, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CSX
CSX CORP Stock $csx