$CSX
CSX CORP Stock $csx

$csx Overview Financials Valuation SEC Filings Company Website

2017 Q4 Form 10-K Financial Statement

#000027794818000009 Filed on February 07, 2018

Income Statement

Concept	2017 Q4	2017 Q3	2017
Revenue	$2.863B	$2.743B	$11.41B
YoY Change	-5.73%	1.22%	3.06%
Cost Of Revenue	$783.0M	$721.0M	$2.977B
YoY Change	10.28%	5.87%	6.13%
Gross Profit	$2.080B	$2.022B	$8.431B
YoY Change	-10.61%	-0.34%	2.02%
Gross Profit Margin	72.65%	73.71%	73.9%
Selling, General & Admin	$844.0M	$814.0M	$3.375B
YoY Change	-13.44%	-6.11%	-6.25%
% of Gross Profit	40.58%	40.26%	40.03%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$337.0M	$331.0M	$1.315B
YoY Change	-3.16%	3.12%	1.08%
% of Gross Profit	16.2%	16.37%	15.6%
Operating Expenses	$1.181B	$1.875B	$7.688B
YoY Change	-10.73%	0.32%	0.42%
Operating Profit	$1.126B	$868.0M	$3.720B
YoY Change	12.15%	3.21%	9.0%
Interest Expense	$79.00M	$132.0M	$546.0M
YoY Change	-150.64%	-5.04%	-5.7%
% of Operating Profit	7.02%	15.21%	14.68%
Other Income/Expense, Net	$34.00M	$14.00M	$53.00M
YoY Change	88.89%	7.69%	140.91%
Pretax Income	$983.0M	$750.0M	$3.142B
YoY Change	30.89%	4.9%	14.63%
Income Tax	$349.0M	$291.0M	-$2.329B
% Of Pretax Income	35.5%	38.8%	-74.12%
Net Earnings	$4.140B	$459.0M	$5.471B
YoY Change	803.93%	0.88%	219.19%
Net Earnings / Revenue	144.6%	16.73%	47.96%
Basic Earnings Per Share	$4.63	$0.51	$6.01
Diluted Earnings Per Share	$4.62	$0.51	$5.99
COMMON SHARES
Basic Shares Outstanding		902.0M shares	911.0M shares
Diluted Shares Outstanding		906.0M shares	914.0M shares

Balance Sheet

Concept	2017 Q4	2017 Q3	2017
SHORT-TERM ASSETS
Cash & Short-Term Investments	$419.0M	$704.0M	$419.0M
YoY Change	-58.92%	-6.75%	-58.92%
Cash & Equivalents	$401.0M	$591.0M	$401.0M
Short-Term Investments	$18.00M	$113.0M	$18.00M
Other Short-Term Assets	$154.0M	$95.00M	$154.0M
YoY Change	26.23%	10.47%	26.23%
Inventory	$372.0M	$392.0M	$372.0M
Prepaid Expenses
Receivables	$970.0M	$981.0M	$970.0M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$1.915B	$2.172B	$1.915B
YoY Change	-23.0%	0.42%	-23.0%
LONG-TERM ASSETS
Property, Plant & Equipment	$31.76B	$31.58B	$31.76B
YoY Change	1.97%	2.59%	1.97%
Goodwill	$63.00M
YoY Change	0.0%
Intangibles
YoY Change
Long-Term Investments	$1.686B	$1.506B	$1.686B
YoY Change	15.56%	5.09%	15.56%
Other Assets	$374.0M	$316.0M	$374.0M
YoY Change	17.61%	4.29%	17.61%
Total Long-Term Assets	$33.82B	$33.40B	$33.82B
YoY Change	2.72%	2.72%	2.72%
TOTAL ASSETS
Total Short-Term Assets	$1.915B	$2.172B	$1.915B
Total Long-Term Assets	$33.82B	$33.40B	$33.82B
Total Assets	$35.74B	$35.57B	$35.74B
YoY Change	0.92%	2.57%	0.92%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$847.0M	$905.0M	$847.0M
YoY Change	5.09%	5.36%	5.09%
Accrued Expenses	$602.0M	$601.0M	$602.0M
YoY Change	10.46%	33.56%	10.46%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$19.00M	$19.00M	$19.00M
YoY Change	-94.26%	-96.99%	-94.26%
Total Short-Term Liabilities	$1.894B	$2.075B	$1.894B
YoY Change	-7.16%	-8.31%	-7.16%
LONG-TERM LIABILITIES
Long-Term Debt	$11.79B	$11.79B	$11.79B
YoY Change	7.55%	19.22%	7.55%
Other Long-Term Liabilities	$650.0M	$766.0M	$916.0M
YoY Change	-24.68%	-30.68%	-18.36%
Total Long-Term Liabilities	$650.0M	$766.0M	$12.71B
YoY Change	-24.68%	-30.68%	5.15%
TOTAL LIABILITIES
Total Short-Term Liabilities	$1.894B	$2.075B	$1.894B
Total Long-Term Liabilities	$650.0M	$766.0M	$12.71B
Total Liabilities	$21.02B	$24.67B	$21.03B
YoY Change	-11.39%	7.21%	-11.38%
SHAREHOLDERS EQUITY
Retained Earnings	$14.08B	$10.33B
YoY Change	25.16%	-8.07%
Common Stock	$1.107B	$1.121B
YoY Change	3.85%	5.56%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$14.71B	$10.89B	$14.71B
YoY Change
Total Liabilities & Shareholders Equity	$35.74B	$35.57B	$35.74B
YoY Change	0.92%	2.57%	0.92%

Cashflow Statement

Concept	2017 Q4	2017 Q3	2017
OPERATING ACTIVITIES
Net Income	$4.140B	$459.0M	$5.471B
YoY Change	803.93%	0.88%	219.19%
Depreciation, Depletion And Amortization	$337.0M	$331.0M	$1.315B
YoY Change	-3.16%	3.12%	1.08%
Cash From Operating Activities	$611.0M	$1.295B	$3.472B
YoY Change	10.49%	44.53%	14.17%
INVESTING ACTIVITIES
Capital Expenditures	-$578.0M	-$507.0M	$2.040B
YoY Change	-28.47%	-3.24%	-14.93%
Acquisitions
YoY Change
Other Investing Activities	$162.0M	$395.0M	-$37.00M
YoY Change	-267.01%	252.68%	311.11%
Cash From Investing Activities	-$416.0M	-$112.0M	-$1.495B
YoY Change	-54.03%	-72.82%	-16.85%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$1.000B	$1.970B
YoY Change		280.23%	86.55%
Debt Paid & Issued, Net			$333.0M
YoY Change			-76.53%
Cash From Financing Activities	-385.0M	-1.212B	-$2.179B
YoY Change	-209.38%	171.14%	71.85%
NET CHANGE
Cash From Operating Activities	611.0M	1.295B	$3.472B
Cash From Investing Activities	-416.0M	-112.0M	-$1.495B
Cash From Financing Activities	-385.0M	-1.212B	-$2.179B
Net Change In Cash	-190.0M	-29.00M	-$202.0M
YoY Change		-178.38%	708.0%
FREE CASH FLOW
Cash From Operating Activities	$611.0M	$1.295B	$3.472B
Capital Expenditures	-$578.0M	-$507.0M	$2.040B
Free Cash Flow	$1.189B	$1.802B	$1.432B
YoY Change	-12.64%	26.9%	122.71%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2017	csx	Cash Equivalents Maximum Maturity Period CashEquivalentsMaximumMaturityPeriod	P3M
CY2017Q4	csx	Casualty And Catastrophic Property Deductible CasualtyAndCatastrophicPropertyDeductible	50000000	USD
CY2017Q4	csx	Casualty And Non Catastrophic Property Deductible CasualtyAndNonCatastrophicPropertyDeductible	25000000	USD
CY2017	csx	Cost Method Investment Maximum Percentage For Treatment CostMethodInvestmentMaximumPercentageForTreatment	0.20
CY2016Q4	csx	Defined Benefit Plan Fair Valueof Plan Assets Excluding Assets Measuredat Nav DefinedBenefitPlanFairValueofPlanAssetsExcludingAssetsMeasuredatNAV	1616000000	USD
CY2017Q4	csx	Defined Benefit Plan Fair Valueof Plan Assets Excluding Assets Measuredat Nav DefinedBenefitPlanFairValueofPlanAssetsExcludingAssetsMeasuredatNAV	1764000000	USD
CY2017	csx	Defined Benefit Special Termination Benefits Curtailments DefinedBenefitSpecialTerminationBenefitsCurtailments	56000000	USD
CY2017Q4	csx	Effective Income Tax Rate Reconciliation Changein Enacted Tax Rate Amount Per Share EffectiveIncomeTaxRateReconciliationChangeinEnactedTaxRateAmountPerShare	3.81
CY2017Q4	csx	Effective Income Tax Rate Reconciliation Changein Enacted Tax Rate Amount Per Share EffectiveIncomeTaxRateReconciliationChangeinEnactedTaxRateAmountPerShare	3.91
CY2015	csx	Effective Income Tax Rate Reconciliation Federal Effective Rate Percent EffectiveIncomeTaxRateReconciliationFederalEffectiveRatePercent	0.350
CY2016	csx	Effective Income Tax Rate Reconciliation Federal Effective Rate Percent EffectiveIncomeTaxRateReconciliationFederalEffectiveRatePercent	0.350
CY2017	csx	Effective Income Tax Rate Reconciliation Federal Effective Rate Percent EffectiveIncomeTaxRateReconciliationFederalEffectiveRatePercent	0.350
CY2015	csx	Equipmentand Other Rents EquipmentandOtherRents	456000000	USD
CY2016	csx	Equipmentand Other Rents EquipmentandOtherRents	465000000	USD
CY2017	csx	Equipmentand Other Rents EquipmentandOtherRents	429000000	USD
CY2015	csx	Incomefrom Real Estate Operations IncomefromRealEstateOperations	83000000	USD
CY2016	csx	Incomefrom Real Estate Operations IncomefromRealEstateOperations	27000000	USD
CY2017	csx	Incomefrom Real Estate Operations IncomefromRealEstateOperations	0	USD
CY2017	csx	Lease Term Maximum LeaseTermMaximum	P30Y
CY2017Q4	csx	Net Lease Commitments Due Current Year NetLeaseCommitmentsDueCurrentYear	65000000	USD
CY2017Q4	csx	Net Lease Commitments Due In Five Years NetLeaseCommitmentsDueInFiveYears	38000000	USD
CY2017Q4	csx	Net Lease Commitments Due In Three Years NetLeaseCommitmentsDueInThreeYears	47000000	USD
CY2017Q4	csx	Net Lease Commitments Due In Four Years NetLeaseCommitmentsDueInFourYears	42000000	USD
CY2017Q4	csx	Net Lease Commitments Due In Two Years NetLeaseCommitmentsDueInTwoYears	61000000	USD
CY2017Q4	csx	Net Lease Commitments Thereafter NetLeaseCommitmentsThereafter	122000000	USD
CY2017Q4	csx	Net Lease Commitments Total NetLeaseCommitmentsTotal	375000000	USD
CY2015	csx	Number Of Locomotives Under Long Term Maintenance Plan NumberOfLocomotivesUnderLongTermMaintenancePlan	2310	locomotive
CY2016	csx	Number Of Locomotives Under Long Term Maintenance Plan NumberOfLocomotivesUnderLongTermMaintenancePlan	2243	locomotive
CY2017	csx	Number Of Locomotives Under Long Term Maintenance Plan NumberOfLocomotivesUnderLongTermMaintenancePlan	2062	locomotive
CY2017Q4	csx	Number Of Short Line And Regional Railroads Served NumberOfShortLineAndRegionalRailroadsServed	230	railroad
CY2017	csx	Number Of Union Employees NumberOfUnionEmployees	20000	employee
CY2015	csx	Other Nonoperating Income Expense Net OtherNonoperatingIncomeExpenseNet	98000000	USD
CY2016	csx	Other Nonoperating Income Expense Net OtherNonoperatingIncomeExpenseNet	-69000000	USD
CY2017	csx	Other Nonoperating Income Expense Net OtherNonoperatingIncomeExpenseNet	21000000	USD
CY2017Q4	csx	Percentage Of Assets Depreciated Under Group Life Method PercentageOfAssetsDepreciatedUnderGroupLifeMethod	0.86
CY2017Q4	csx	Percentage Of Labor Cost Rail Installation Deconstruction Of Old Track PercentageOfLaborCostRailInstallationDeconstructionOfOldTrack	0.20
CY2017Q4	csx	Percentage Of Labor Cost Rail Installation Installation Of New Track PercentageOfLaborCostRailInstallationInstallationOfNewTrack	0.80
CY2017Q4	csx	Rail Route Network Distance RailRouteNetworkDistance	21000	mi
CY2015	csx	Real Estate Revenue Gross RealEstateRevenueGross	104000000	USD
CY2016	csx	Real Estate Revenue Gross RealEstateRevenueGross	56000000	USD
CY2017	csx	Real Estate Revenue Gross RealEstateRevenueGross	0	USD
CY2017Q2	csx	Shareholder Voting Percent ShareholderVotingPercent	0.93
CY2017	csx	Short Term Investments Maximum Maturity Period ShortTermInvestmentsMaximumMaturityPeriod	P1Y
CY2017	csx	Short Term Investments Minimum Maturity Period ShortTermInvestmentsMinimumMaturityPeriod	P3M
CY2017Q4	csx	Total Longterm Debt TotalLongtermDebt	11809000000	USD
CY2017Q4	csx	Unrecorded Unconditional Purchase Obligation Percentof Asset Category Covered UnrecordedUnconditionalPurchaseObligationPercentofAssetCategoryCovered	0.50
CY2017	dei	Amendment Flag AmendmentFlag	false
CY2017	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2017	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2017	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2017
CY2017	dei	Document Period End Date DocumentPeriodEndDate	2017-12-31
CY2017	dei	Document Type DocumentType	10-K
CY2017	dei	Entity Central Index Key EntityCentralIndexKey	0000277948
CY2018Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	887236080	shares
CY2017	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2017	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2017Q4	dei	Entity Number Of Employees EntityNumberOfEmployees	24000	employee
CY2017Q2	dei	Entity Public Float EntityPublicFloat	47000000000	USD
CY2017	dei	Entity Registrant Name EntityRegistrantName	CSX CORP
CY2017	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2017	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2016Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	806000000	USD
CY2017Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	847000000	USD
CY2016Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	938000000	USD
CY2017Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	970000000	USD
CY2016Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	12077000000	USD
CY2016Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	138000000	USD
CY2017Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	217000000	USD
CY2017Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	12560000000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-640000000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-486000000	USD
CY2015	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	12000000	USD
CY2016	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	37000000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	89000000	USD
CY2016Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	33000000	USD
CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	26000000	USD
CY2016Q4	us-gaap	Alternative Investments Fair Value Disclosure AlternativeInvestmentsFairValueDisclosure	923000000	USD
CY2017Q4	us-gaap	Alternative Investments Fair Value Disclosure AlternativeInvestmentsFairValueDisclosure	1069000000	USD
CY2015	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2016	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2017	us-gaap	Asset Impairment Charges AssetImpairmentCharges	25000000	USD
CY2016Q4	us-gaap	Assets Assets	35414000000	USD
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CY2016Q4	us-gaap	Assets Current AssetsCurrent	2487000000	USD
CY2017Q4	us-gaap	Assets Current AssetsCurrent	1915000000	USD
CY2014Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	669000000	USD
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	628000000	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
CY2015	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-41000000	USD
CY2016	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-25000000	USD
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-202000000	USD
CY2015	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.70
CY2015	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.70
CY2016	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.72
CY2016	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.72
CY2017	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.78
CY2017	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.78
CY2016Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2016Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1.00
CY2017Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2017Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1.00
CY2016Q4	us-gaap	Common Stock Value CommonStockValue	928000000	USD
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	890000000	USD
CY2015	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	2000000000	USD
CY2015	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1969000000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1700000000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1739000000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	5625000000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	5600000000	USD
CY2015	us-gaap	Cost Of Services Maintenance Costs CostOfServicesMaintenanceCosts	233000000	USD
CY2017Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	2800000000	USD
CY2017Q4	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
CY2016	us-gaap	Cost Of Services Maintenance Costs CostOfServicesMaintenanceCosts	230000000	USD
CY2017	us-gaap	Cost Of Services Maintenance Costs CostOfServicesMaintenanceCosts	197000000	USD
CY2017Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Projected Benefit Obligation DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation	226000000	USD
CY2015	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	619000000	USD
CY2016	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	540000000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	787000000	USD
CY2015	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	714000000	USD
CY2016	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	622000000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	904000000	USD
CY2015	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	95000000	USD
CY2016	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	82000000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	117000000	USD
CY2016Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	11293000000	USD
CY2017Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	11809000000	USD
CY2016	us-gaap	Debt Instrument Increase Decrease For Period Net DebtInstrumentIncreaseDecreaseForPeriodNet	800000000	USD
CY2015	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	414000000	USD
CY2016	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	355000000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-3277000000	USD
CY2015	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	456000000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	405000000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-3233000000	USD
CY2016Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	9596000000	USD
CY2017Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	6418000000	USD
CY2015	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	42000000	USD
CY2016	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	50000000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	44000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	622000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	880000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	225000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	657000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	272000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	182000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	125000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	41000000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	10218000000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	7298000000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	293000000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	722000000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	9925000000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	6576000000	USD
CY2017	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation Increase Decrease For Settlement And Curtailment DefinedBenefitPlanAccumulatedBenefitObligationIncreaseDecreaseForSettlementAndCurtailment	-85000000	USD
CY2015	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	0	USD
CY2016	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	250000000	USD
CY2017	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	0	USD
CY2017Q4	us-gaap	Defined Benefit Plan Expected Future Employer Contributions Next Fiscal Year DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear	0	USD
CY2016Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	2539000000	USD
CY2017Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	2833000000	USD
CY2017Q4	us-gaap	Defined Benefit Plan Plans With Benefit Obligations In Excess Of Plan Assets Aggregate Benefit Obligation DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateBenefitObligation	216000000	USD
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CY2017Q4	us-gaap	Defined Benefit Plan Plans With Benefit Obligations In Excess Of Plan Assets Aggregate Fair Value Of Plan Assets DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets	0	USD
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CY2017Q4	us-gaap	Defined Benefit Plan Weighted Average Asset Allocations DefinedBenefitPlanWeightedAverageAssetAllocations	1.00
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CY2016	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	35000000	USD
CY2017	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	39000000	USD
CY2015	us-gaap	Depreciation Depreciation	1208000000	USD
CY2016	us-gaap	Depreciation Depreciation	1301000000	USD
CY2017	us-gaap	Depreciation Depreciation	1315000000	USD
CY2015	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	686000000	USD
CY2016	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	680000000	USD
CY2017	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	708000000	USD
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CY2017Q4	us-gaap	Due From Affiliate Current DueFromAffiliateCurrent	0	USD
CY2016Q4	us-gaap	Due To Affiliate Current DueToAffiliateCurrent	0	USD
CY2017Q4	us-gaap	Due To Affiliate Current DueToAffiliateCurrent	0	USD
CY2015	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.00
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CY2016Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.48
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.49
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.81
CY2017Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.39
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.55
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.51
CY2017Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.63
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	6.01
CY2015	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.00
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CY2016Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.47
CY2016Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.48
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.49
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.81
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.39
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.55
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.51
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.62
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.99
CY2015	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.373
CY2016	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.375
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.742
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.0000
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.0000
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	-1.116
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.004
CY2015	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.027
CY2016	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.030
CY2017	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.032
CY2016Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	545000000	USD
CY2017Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	602000000	USD
CY2015	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	4000000	USD
CY2016	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	14000000	USD
CY2017	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	34000000	USD
CY2015	us-gaap	Fuel Costs FuelCosts	957000000	USD
CY2016	us-gaap	Fuel Costs FuelCosts	713000000	USD
CY2017	us-gaap	Fuel Costs FuelCosts	864000000	USD
CY2016	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	110000000	USD
CY2017	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	14000000	USD
CY2015	us-gaap	Gain Loss On Repurchase Of Debt Instrument GainLossOnRepurchaseOfDebtInstrument	0	USD
CY2016	us-gaap	Gain Loss On Repurchase Of Debt Instrument GainLossOnRepurchaseOfDebtInstrument	-115000000	USD
CY2017	us-gaap	Gain Loss On Repurchase Of Debt Instrument GainLossOnRepurchaseOfDebtInstrument	0	USD
CY2015	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	90000000	USD
CY2016	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	128000000	USD
CY2017	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	18000000	USD
CY2016	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-115000000	USD
CY2016Q4	us-gaap	Goodwill Goodwill	63000000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	63000000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	3138000000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	2741000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	3142000000	USD
CY2015	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	40000000	USD
CY2016	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	50000000	USD
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	219000000	USD
CY2015	us-gaap	Income Loss From Subsidiaries Before Tax IncomeLossFromSubsidiariesBeforeTax	0	USD
CY2016	us-gaap	Income Loss From Subsidiaries Before Tax IncomeLossFromSubsidiariesBeforeTax	0	USD
CY2017	us-gaap	Income Loss From Subsidiaries Before Tax IncomeLossFromSubsidiariesBeforeTax	0	USD
CY2015Q4	us-gaap	Income Tax Examination Liability Refund Adjustment From Settlement With Taxing Authority IncomeTaxExaminationLiabilityRefundAdjustmentFromSettlementWithTaxingAuthority	2000000	USD
CY2016Q4	us-gaap	Income Tax Examination Liability Refund Adjustment From Settlement With Taxing Authority IncomeTaxExaminationLiabilityRefundAdjustmentFromSettlementWithTaxingAuthority	2000000	USD
CY2017Q4	us-gaap	Income Tax Examination Liability Refund Adjustment From Settlement With Taxing Authority IncomeTaxExaminationLiabilityRefundAdjustmentFromSettlementWithTaxingAuthority	3000000	USD
CY2015Q4	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	4000000	USD
CY2016Q4	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	6000000	USD
CY2017Q4	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	6000000	USD
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1170000000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1027000000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-2329000000	USD
CY2015	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2016	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2017Q4	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	3600000000	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-3506000000	USD
CY2015	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	1098000000	USD
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	959000000	USD
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	1100000000	USD
CY2015	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-14000000	USD
CY2016	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-15000000	USD
CY2017	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-25000000	USD
CY2015	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	86000000	USD
CY2016	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	83000000	USD
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	102000000	USD
CY2015	us-gaap	Income Taxes Paid IncomeTaxesPaid	768000000	USD
CY2016	us-gaap	Income Taxes Paid IncomeTaxesPaid	580000000	USD
CY2017	us-gaap	Income Taxes Paid IncomeTaxesPaid	911000000	USD
CY2015	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-79000000	USD
CY2016	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	40000000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	41000000	USD
CY2015	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-149000000	USD
CY2016	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-84000000	USD
CY2017	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	70000000	USD
CY2015	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	-62000000	USD
CY2016	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	23000000	USD
CY2017	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	20000000	USD
CY2015	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	84000000	USD
CY2016	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	113000000	USD
CY2017	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-1000000	USD
CY2015	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	-118000000	USD
CY2016	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	35000000	USD
CY2017	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	43000000	USD
CY2015	us-gaap	Interest Expense InterestExpense	544000000	USD
CY2016	us-gaap	Interest Expense InterestExpense	579000000	USD
CY2017	us-gaap	Interest Expense InterestExpense	546000000	USD
CY2015	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	6000000	USD
CY2016	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	10000000	USD
CY2017	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	13000000	USD
CY2015	us-gaap	Interest Paid Net InterestPaidNet	566000000	USD
CY2016	us-gaap	Interest Paid Net InterestPaidNet	606000000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	555000000	USD
CY2015	us-gaap	Labor And Related Expense LaborAndRelatedExpense	3290000000	USD
CY2016	us-gaap	Labor And Related Expense LaborAndRelatedExpense	3159000000	USD
CY2017	us-gaap	Labor And Related Expense LaborAndRelatedExpense	2914000000	USD
CY2016Q4	us-gaap	Liabilities Liabilities	23720000000	USD
CY2017Q4	us-gaap	Liabilities Liabilities	21018000000	USD
CY2016Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	35414000000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	35739000000	USD
CY2016Q4	us-gaap	Liabilities Current LiabilitiesCurrent	2040000000	USD
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	1894000000	USD
CY2016Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	10962000000	USD
CY2017Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	11790000000	USD
CY2016Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	331000000	USD
CY2017Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	19000000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	10494000000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	162000000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	371000000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	745000000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	18000000	USD
CY2014Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	418000000	USD
CY2015Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	400000000	USD
CY2016Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	374000000	USD
CY2017Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	374000000	USD
CY2016Q4	us-gaap	Loss Contingency Accrual Carrying Value Current LossContingencyAccrualCarryingValueCurrent	115000000	USD
CY2017Q4	us-gaap	Loss Contingency Accrual Carrying Value Current LossContingencyAccrualCarryingValueCurrent	108000000	USD
CY2016Q4	us-gaap	Loss Contingency Accrual Carrying Value Noncurrent LossContingencyAccrualCarryingValueNoncurrent	259000000	USD
CY2017Q4	us-gaap	Loss Contingency Accrual Carrying Value Noncurrent LossContingencyAccrualCarryingValueNoncurrent	266000000	USD
CY2016	us-gaap	Loss Contingency Accrual Carrying Value Period Increase Decrease LossContingencyAccrualCarryingValuePeriodIncreaseDecrease	-28000000	USD
CY2015	us-gaap	Loss Contingency Accrual Payments LossContingencyAccrualPayments	160000000	USD
CY2016	us-gaap	Loss Contingency Accrual Payments LossContingencyAccrualPayments	126000000	USD
CY2017	us-gaap	Loss Contingency Accrual Payments LossContingencyAccrualPayments	114000000	USD
CY2015	us-gaap	Loss Contingency Accrual Provision LossContingencyAccrualProvision	142000000	USD
CY2016	us-gaap	Loss Contingency Accrual Provision LossContingencyAccrualProvision	128000000	USD
CY2017	us-gaap	Loss Contingency Accrual Provision LossContingencyAccrualProvision	114000000	USD
CY2016Q4	us-gaap	Materials Supplies And Other MaterialsSuppliesAndOther	407000000	USD
CY2017Q4	us-gaap	Materials Supplies And Other MaterialsSuppliesAndOther	372000000	USD
CY2016Q4	us-gaap	Minority Interest MinorityInterest	15000000	USD
CY2017Q4	us-gaap	Minority Interest MinorityInterest	16000000	USD
CY2015	us-gaap	Multiemployer Plan Contributions By Employer MultiemployerPlanContributionsByEmployer	32000000	USD
CY2016	us-gaap	Multiemployer Plan Contributions By Employer MultiemployerPlanContributionsByEmployer	35000000	USD
CY2017	us-gaap	Multiemployer Plan Contributions By Employer MultiemployerPlanContributionsByEmployer	40000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-519000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-1268000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-2179000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2892000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1798000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1495000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	3370000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	3041000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	3472000000	USD
CY2015	us-gaap	Net Income Loss NetIncomeLoss	1968000000	USD
CY2016Q1	us-gaap	Net Income Loss NetIncomeLoss	356000000	USD
CY2016Q2	us-gaap	Net Income Loss NetIncomeLoss	445000000	USD
CY2016Q3	us-gaap	Net Income Loss NetIncomeLoss	455000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	458000000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	1714000000	USD
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	362000000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	510000000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	459000000	USD
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	4140000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	5471000000	USD
CY2015	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	1967000000	USD
CY2016	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	1713000000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	5470000000	USD
CY2015	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	307000000	USD
CY2016	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	0	USD
CY2017	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	0	USD
CY2015	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	98000000	USD
CY2016	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	46000000	USD
CY2017	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	21000000	USD
CY2017Q4	us-gaap	Number Of States In Which Entity Operates NumberOfStatesInWhichEntityOperates	23	state
CY2015	us-gaap	Operating Expenses OperatingExpenses	8227000000	USD
CY2016	us-gaap	Operating Expenses OperatingExpenses	7680000000	USD
CY2017	us-gaap	Operating Expenses OperatingExpenses	7741000000	USD
CY2015	us-gaap	Operating Income Loss OperatingIncomeLoss	3584000000	USD
CY2016Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	704000000	USD
CY2016Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	840000000	USD
CY2016Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	841000000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	1004000000	USD
CY2016	us-gaap	Operating Income Loss OperatingIncomeLoss	3389000000	USD
CY2017Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	712000000	USD
CY2017Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	958000000	USD
CY2017Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	876000000	USD
CY2017Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	1121000000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	3667000000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	396000000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	68000000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	41000000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	45000000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	50000000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	64000000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	128000000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Receivable OperatingLeasesFutureMinimumPaymentsReceivable	21000000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Receivable Current OperatingLeasesFutureMinimumPaymentsReceivableCurrent	3000000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Receivable In Five Years OperatingLeasesFutureMinimumPaymentsReceivableInFiveYears	3000000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Receivable In Four Years OperatingLeasesFutureMinimumPaymentsReceivableInFourYears	3000000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Receivable In Three Years OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears	3000000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Receivable In Two Years OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears	3000000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Receivable Thereafter OperatingLeasesFutureMinimumPaymentsReceivableThereafter	6000000	USD
CY2016Q4	us-gaap	Other Assets Current OtherAssetsCurrent	122000000	USD
CY2017Q4	us-gaap	Other Assets Current OtherAssetsCurrent	154000000	USD
CY2016Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	318000000	USD
CY2017Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	374000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Before Reclassifications Before Tax OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax	-61000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Before Reclassifications Before Tax OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax	-13000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Before Reclassifications Before Tax OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax	161000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	1000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	25000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	154000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	7000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	13000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	65000000	USD
CY2015	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	2356000000	USD
CY2016	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	2092000000	USD
CY2017	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	2113000000	USD
CY2016Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	114000000	USD
CY2017Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	161000000	USD
CY2016Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	863000000	USD
CY2017Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	650000000	USD
CY2015	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	9000000	USD
CY2016	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	9000000	USD
CY2017	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	8000000	USD
CY2015	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	62000000	USD
CY2016	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-20000000	USD
CY2017	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-17000000	USD
CY2015	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	-1000000	USD
CY2016	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
CY2015	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-37000000	USD
CY2016	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-9000000	USD
CY2017	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-37000000	USD
CY2015	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	804000000	USD
CY2016	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1056000000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1970000000	USD
CY2015	us-gaap	Payments For Restructuring PaymentsForRestructuring	0	USD
CY2016	us-gaap	Payments For Restructuring PaymentsForRestructuring	0	USD
CY2017	us-gaap	Payments For Restructuring PaymentsForRestructuring	187000000	USD
CY2015	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	686000000	USD
CY2016	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	680000000	USD
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	708000000	USD
CY2015	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2562000000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2398000000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2040000000	USD
CY2015	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	1739000000	USD
CY2016	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	929000000	USD
CY2017	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	782000000	USD
CY2015	us-gaap	Pension Contributions PensionContributions	0	USD
CY2016	us-gaap	Pension Contributions PensionContributions	250000000	USD
CY2017	us-gaap	Pension Contributions PensionContributions	0	USD
CY2015	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1200000000	USD
CY2016	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	2200000000	USD
CY2017	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	850000000	USD
CY2015	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	0	USD
CY2016	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-313000000	USD
CY2017	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	1970000000	USD
CY2014Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	11176000000	USD
CY2015Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	11668000000	USD
CY2017	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-18000000	USD
CY2015	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	147000000	USD
CY2016	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	195000000	USD
CY2017	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	97000000	USD
CY2015	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	1225000000	USD
CY2016	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	1325000000	USD
CY2017	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	1193000000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	43227000000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	44000000000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	44324000000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	31150000000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	31764000000	USD
CY2015	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Before Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax	-69000000	USD
CY2016	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Before Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax	-51000000	USD
CY2017	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Before Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax	-58000000	USD
CY2016	us-gaap	Repayments Of Debt RepaymentsOfDebt	1400000000	USD
CY2015	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	229000000	USD
CY2016	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1419000000	USD
CY2017	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	333000000	USD
CY2015	us-gaap	Restructuring Charges RestructuringCharges	0	USD
CY2016	us-gaap	Restructuring Charges RestructuringCharges	0	USD
CY2017	us-gaap	Restructuring Charges RestructuringCharges	325000000	USD
CY2015	us-gaap	Restructuring Costs RestructuringCosts	51000000	USD
CY2016	us-gaap	Restructuring Costs RestructuringCosts	0	USD
CY2016Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	11253000000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	14084000000	USD
CY2015	us-gaap	Sales Revenue Net SalesRevenueNet	11811000000	USD
CY2016Q1	us-gaap	Sales Revenue Net SalesRevenueNet	2618000000	USD
CY2016Q2	us-gaap	Sales Revenue Net SalesRevenueNet	2704000000	USD
CY2016Q3	us-gaap	Sales Revenue Net SalesRevenueNet	2710000000	USD
	us-gaap	Sales Revenue Net SalesRevenueNet	3037000000	USD
CY2016	us-gaap	Sales Revenue Net SalesRevenueNet	11069000000	USD
CY2017Q1	us-gaap	Sales Revenue Net SalesRevenueNet	2869000000	USD
CY2017Q2	us-gaap	Sales Revenue Net SalesRevenueNet	2933000000	USD
CY2017Q3	us-gaap	Sales Revenue Net SalesRevenueNet	2743000000	USD
CY2017Q4	us-gaap	Sales Revenue Net SalesRevenueNet	2863000000	USD
CY2017	us-gaap	Sales Revenue Net SalesRevenueNet	11408000000	USD
CY2016Q4	us-gaap	Short Term Investments ShortTermInvestments	417000000	USD
CY2017Q4	us-gaap	Short Term Investments ShortTermInvestments	18000000	USD
CY2015	us-gaap	Stock Issued During Period Value Conversion Of Convertible Securities StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	0	USD
CY2016	us-gaap	Stock Issued During Period Value Conversion Of Convertible Securities StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	1000000	USD
CY2015	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	26000000	shares
CY2016	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	38000000	shares
CY2017	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	39000000	shares
CY2015	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	804000000	USD
CY2016	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	1056000000	USD
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	11694000000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	14721000000	USD
CY2015	us-gaap	Stockholders Equity Other StockholdersEquityOther	-13000000	USD
CY2016	us-gaap	Stockholders Equity Other StockholdersEquityOther	-22000000	USD
CY2017	us-gaap	Stockholders Equity Other StockholdersEquityOther	-80000000	USD
CY2017	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	21000000	USD
CY2016Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	129000000	USD
CY2017Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	157000000	USD
CY2014Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	21000000	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	23000000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	25000000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	24000000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	4000000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1000000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1000000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	4000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	4000000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	4000000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Increases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsIncreasesResultingFromSettlementsWithTaxingAuthorities	1000000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	4000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	3000000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	2000000	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	15000000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	16000000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	19000000	USD
CY2017Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Fifth Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary	258000000	USD
CY2017Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On First Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary	290000000	USD
CY2017Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Fourth Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary	258000000	USD
CY2017Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Second Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary	229000000	USD
CY2017Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Third Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary	253000000	USD
CY2017Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance Sheet Amount UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount	4217000000	USD
CY2017Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Due After Five Years UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears	2929000000	USD
CY2015	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	1000000	shares
CY2016	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	1000000	shares
CY2017	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	3000000	shares
CY2015	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	984000000	shares
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	948000000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	914000000	shares
CY2015	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	983000000	shares
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	947000000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	911000000	shares
CY2017	us-gaap	Fiscal Period FiscalPeriod	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:justify;text-indent:48px;font-size:11pt;"><font 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. The 52/53 week calendar allowed for every quarter and year to be of equal duration, 13 weeks and 52 weeks, respectively. To maintain this calendar, every fifth or sixth year, an extra week was added to the fourth quarter and year, making the reporting periods 14 weeks and 53 weeks, respectively. In 2016, the fourth quarter and fiscal year included this extra week. </font></div><div style="line-height:120%;text-align:justify;text-indent:48px;font-size:11pt;"><font style="font-family:Arial;font-size:11pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;text-indent:48px;font-size:11pt;"><font style="font-family:Arial;font-size:11pt;">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:</font></div><div style="line-height:120%;text-align:justify;text-indent:48px;font-size:11pt;"><font style="font-family:Arial;font-size:11pt;"><br clear="none"/></font></div><table cellpadding="0" cellspacing="0" style="padding-bottom:8px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:48px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:11pt;padding-left:24px;"><font style="font-family:Arial;font-size:11pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:11pt;"><font style="font-family:Arial;font-size:11pt;">Fiscal year 2017 (December 31, 2016 through December 31, 2017) contained 366 days, and fiscal year 2016 (December 26, 2015 through December 30, 2016) contained 371 days</font></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:48px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:11pt;padding-left:24px;"><font style="font-family:Arial;font-size:11pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:11pt;"><font style="font-family:Arial;font-size:11pt;">Fiscal first quarter 2017 (December 31, 2016 through March 31, 2017) contained 91 days, and fiscal first quarter 2016 (December 26, 2015 through March 25, 2016) contained 91 days</font></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:48px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:11pt;padding-left:24px;"><font style="font-family:Arial;font-size:11pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:11pt;"><font style="font-family:Arial;font-size:11pt;">Fiscal second quarter 2017 (April 1, 2017 through June 30, 2017) contained 91 days, and fiscal second quarter 2016 (September 24, 2016 through December 30, 2016) contained 91 days</font></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:48px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:11pt;padding-left:24px;"><font style="font-family:Arial;font-size:11pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:11pt;"><font style="font-family:Arial;font-size:11pt;">Fiscal third quarter 2017 (July 1, 2017 through September 30, 2017) contained 92 days, and fiscal third quarter 2016 (June 25, 2016 through September 23, 2016) contained 91 days</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:48px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:11pt;padding-left:24px;"><font style="font-family:Arial;font-size:11pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:11pt;"><font style="font-family:Arial;font-size:11pt;">Fiscal fourth quarter 2017 (October 1, 2017 through December 31, 2017) contained 92 days, and fiscal fourth quarter 2016 (September 24, 2016 through December 30, 2016) contained 98 days</font></div></td></tr></table><div style="line-height:120%;text-align:justify;text-indent:48px;font-size:11pt;"><font style="font-family:Arial;font-size:11pt;">    </font></div><div style="line-height:120%;text-align:justify;text-indent:48px;font-size:11pt;"><font style="font-family:Arial;font-size:11pt;">This change did not materially impact comparability of the Company’s financial results for fiscal year 2016 and fiscal year 2017. Accordingly, the change to a calendar fiscal year was made on a prospective basis and operating results for prior periods have not been adjusted. The Company is not required to file a transition report because this change is 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 and within seven days of the prior fiscal year end. Except as otherwise specified, references to full years indicate CSX’s fiscal years ended on December 31, 2017 and December 30, 2016.</font></div></div>
CY2017	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:justify;text-indent:48px;font-size:11pt;"><font 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:</font></div><div style="line-height:120%;text-align:justify;font-size:11pt;"><font style="font-family:Arial;font-size:11pt;"><br clear="none"/></font></div><table cellpadding="0" cellspacing="0" style="padding-bottom:8px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:72px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:11pt;padding-left:48px;"><font style="font-family:inherit;font-size:10pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:11pt;"><font style="font-family:Arial;font-size:11pt;">personal injury, environmental and legal reserves (see Note 5, </font><font style="font-family:Arial;font-size:11pt;font-style:italic;">Casualty, Environmental and Other Reserves</font><font style="font-family:Arial;font-size:11pt;">);</font></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;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:11pt;padding-left:48px;"><font style="font-family:inherit;font-size:10pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:11pt;"><font style="font-family:Arial;font-size:11pt;">pension and post-retirement medical plan accounting (see Note 8, </font><font style="font-family:Arial;font-size:11pt;font-style:italic;">Employee Benefit Plans</font><font style="font-family:Arial;font-size:11pt;">);</font></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;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:11pt;padding-left:48px;"><font style="font-family:inherit;font-size:10pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:11pt;"><font style="font-family:Arial;font-size:11pt;">depreciation policies for assets under the group-life method (see Note 6, </font><font style="font-family:Arial;font-size:11pt;font-style:italic;">Properties</font><font style="font-family:Arial;font-size:11pt;">); and</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:72px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:11pt;padding-left:48px;"><font style="font-family:inherit;font-size:10pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:11pt;"><font style="font-family:Arial;font-size:11pt;">income taxes (see Note 11, </font><font style="font-family:Arial;font-size:11pt;font-style:italic;">Income Taxes</font><font style="font-family:Arial;font-size:11pt;">).</font></div></td></tr></table><div style="line-height:120%;text-align:left;font-size:11pt;"><font style="font-family:Arial;font-size:11pt;"><br clear="none"/></font></div></div>

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$CSX
CSX CORP Stock $csx

2017 Q4 Form 10-K Financial Statement

#000027794818000009 Filed on February 07, 2018

Income Statement

Balance Sheet

Cashflow Statement

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$CSX CSX CORP Stock $csx

2017 Q4 Form 10-K Financial Statement

#000027794818000009 Filed on February 07, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CSX
CSX CORP Stock $csx