$X
UNITED STATES STEEL CORP Stock $x

$x Overview Financials Valuation SEC Filings Company Website

2020 Q1 Form 10-K Financial Statement

#000116330220000012 Filed on February 14, 2020

Income Statement

Concept	2020 Q1	2019	2018 Q4
Revenue	$2.748B	$12.94B	$3.691B
YoY Change	-21.46%	-8.75%	17.81%
Cost Of Revenue	$2.605B	$12.08B	$3.204B
YoY Change	-17.88%	-1.81%	16.59%
Gross Profit	$143.0M	$855.0M	$487.0M
YoY Change	-56.27%	-54.35%	26.49%
Gross Profit Margin	5.2%	6.61%	13.19%
Selling, General & Admin	$72.00M	$289.0M	$85.00M
YoY Change	-7.69%	-13.99%	-12.37%
% of Gross Profit	50.35%	33.8%	17.45%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$160.0M	$616.0M	$137.0M
YoY Change	11.89%	18.23%	9.6%
% of Gross Profit	111.89%	72.05%	28.13%
Operating Expenses	$72.00M	$289.0M	$219.0M
YoY Change	-7.69%	-13.99%	-0.9%
Operating Profit	-$375.0M	-$230.0M	$268.0M
YoY Change	-437.84%	-120.46%	63.41%
Interest Expense	$50.00M	$142.0M	$2.000M
YoY Change	47.06%	-15.48%	-106.06%
% of Operating Profit			0.75%
Other Income/Expense, Net	$3.000M	-$6.000M	$1.000M
YoY Change	0.0%		-102.44%
Pretax Income	-$410.0M	-$452.0M	$253.0M
YoY Change	-761.29%	-155.67%	261.43%
Income Tax	-$19.00M	$178.0M	-$339.0M
% Of Pretax Income			-133.99%
Net Earnings	-$391.0M	-$630.0M	$592.0M
YoY Change	-824.07%	-156.5%	272.33%
Net Earnings / Revenue	-14.23%	-4.87%	16.04%
Basic Earnings Per Share	-$2.30	-$3.67
Diluted Earnings Per Share	-$2.30	-$3.67	$3.333M
COMMON SHARES
Basic Shares Outstanding	170.0M shares		177.3M shares
Diluted Shares Outstanding	170.2M shares	171.4M shares

Balance Sheet

Concept	2020 Q1	2019	2018 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.350B	$749.0M	$1.000B
YoY Change	99.7%	-25.1%	-35.61%
Cash & Equivalents	$1.350B	$749.0M	$1.000B
Short-Term Investments
Other Short-Term Assets	$89.00M	$107.0M	$79.00M
YoY Change	-3.26%	15.05%	-7.06%
Inventory	$2.075B	$1.785B	$2.092B
Prepaid Expenses
Receivables	$1.085B	$1.172B	$1.645B
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$4.686B	$3.813B	$4.830B
YoY Change	1.21%	-21.06%	1.58%
LONG-TERM ASSETS
Property, Plant & Equipment	$5.407B	$5.677B	$4.865B
YoY Change	8.38%	16.69%	13.67%
Goodwill
YoY Change
Intangibles	$134.0M		$158.0M
YoY Change	-14.1%		-5.39%
Long-Term Investments	$1.421B	$1.274B	$485.0M
YoY Change	165.61%	160.53%	6.13%
Other Assets	$324.0M	$503.0M	$134.0M
YoY Change	79.01%	-18.34%	8.06%
Total Long-Term Assets	$7.680B	$7.795B	$6.152B
YoY Change	17.76%	26.71%	20.46%
TOTAL ASSETS
Total Short-Term Assets	$4.686B	$3.813B	$4.830B
Total Long-Term Assets	$7.680B	$7.795B	$6.152B
Total Assets	$12.37B	$11.61B	$10.98B
YoY Change	10.89%	5.7%	11.36%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$70.00M	$66.00M	$63.00M
YoY Change	-40.68%	4.76%	0.0%
Accrued Expenses	$427.0M	$441.0M	$479.0M
YoY Change	3.64%	-7.93%	15.14%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$99.00M	$14.00M	$65.00M
YoY Change	50.0%	-78.46%	2066.67%
Total Short-Term Liabilities	$2.777B	$2.625B	$3.197B
YoY Change	-11.56%	-17.89%	15.29%
LONG-TERM LIABILITIES
Long-Term Debt	$4.616B	$3.627B	$2.316B
YoY Change	98.45%	56.61%	-14.22%
Other Long-Term Liabilities	$464.0M	$1.259B	$272.0M
YoY Change	55.18%	0.56%	-10.23%
Total Long-Term Liabilities	$464.0M	$4.886B	$272.0M
YoY Change	55.18%	36.94%	-10.23%
TOTAL LIABILITIES
Total Short-Term Liabilities	$2.777B	$2.625B	$3.197B
Total Long-Term Liabilities	$464.0M	$4.886B	$272.0M
Total Liabilities	$8.640B	$7.516B	$6.779B
YoY Change	24.93%	10.86%	3.64%
SHAREHOLDERS EQUITY
Retained Earnings	$151.0M		$1.212B
YoY Change	-87.97%		811.28%
Common Stock	$179.0M		$177.0M
YoY Change	0.56%		0.57%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$175.0M		$78.00M
YoY Change	38.89%		2.63%
Treasury Stock Shares	8.653M shares		2.858M shares
Shareholders Equity	$3.725B	$4.092B	$4.202B
YoY Change
Total Liabilities & Shareholders Equity	$12.37B	$11.61B	$10.98B
YoY Change	10.89%	5.7%	11.36%

Cashflow Statement

Concept	2020 Q1	2019	2018 Q4
OPERATING ACTIVITIES
Net Income	-$391.0M	-$630.0M	$592.0M
YoY Change	-824.07%	-156.5%	272.33%
Depreciation, Depletion And Amortization	$160.0M	$616.0M	$137.0M
YoY Change	11.89%	18.23%	9.6%
Cash From Operating Activities	-$142.0M	$682.0M	$216.0M
YoY Change	-589.66%	-27.29%	-22.86%
INVESTING ACTIVITIES
Capital Expenditures	$282.0M	$1.252B	-$355.0M
YoY Change	-6.62%	25.07%	65.89%
Acquisitions
YoY Change
Other Investing Activities	$4.000M	$0.00	$29.00M
YoY Change		-100.0%	70.59%
Cash From Investing Activities	-$277.0M	-$1.958B	-$326.0M
YoY Change	-8.28%	103.32%	65.48%
FINANCING ACTIVITIES
Cash Dividend Paid	$2.000M	$35.00M
YoY Change	-77.78%	-2.78%
Common Stock Issuance & Retirement, Net	$0.00	$88.00M
YoY Change	-100.0%	17.33%
Debt Paid & Issued, Net		$155.0M
YoY Change		-88.07%
Cash From Financing Activities	$983.0M	$1.177B	-231.0M
YoY Change	-1855.36%	-328.54%	3.13%
NET CHANGE
Cash From Operating Activities	-$142.0M	$682.0M	216.0M
Cash From Investing Activities	-$277.0M	-$1.958B	-326.0M
Cash From Financing Activities	$983.0M	$1.177B	-231.0M
Net Change In Cash	$558.0M	-$101.0M	-341.0M
YoY Change	-268.58%	-81.87%	141.84%
FREE CASH FLOW
Cash From Operating Activities	-$142.0M	$682.0M	$216.0M
Capital Expenditures	$282.0M	$1.252B	-$355.0M
Free Cash Flow	-$424.0M	-$570.0M	$571.0M
YoY Change	55.31%	804.76%	15.59%

Facts In Submission

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CY2017	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	0	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-82000000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	934000000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1039000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	6000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	USD
CY2017	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-191000000	USD
CY2018	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxPortionAttributableToParent	0	USD
CY2017	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxPortionAttributableToParent	0	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	749000000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1000000000	USD
CY2019Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	956000000	USD
CY2018Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	1435000000	USD
CY2019Q4	us-gaap	Due From Related Parties Current DueFromRelatedPartiesCurrent	221000000	USD
CY2018Q4	us-gaap	Due From Related Parties Current DueFromRelatedPartiesCurrent	224000000	USD
CY2019Q4	us-gaap	Inventory Net InventoryNet	1785000000	USD
CY2018Q4	us-gaap	Inventory Net InventoryNet	2092000000	USD
CY2019Q4	us-gaap	Other Assets Current OtherAssetsCurrent	102000000	USD
CY2018Q4	us-gaap	Other Assets Current OtherAssetsCurrent	79000000	USD
CY2019Q4	us-gaap	Assets Current AssetsCurrent	3813000000	USD
CY2018Q4	us-gaap	Assets Current AssetsCurrent	4830000000	USD
CY2019Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	188000000	USD
CY2018Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	37000000	USD
CY2019Q4	us-gaap	Long Term Investments And Receivables Net LongTermInvestmentsAndReceivablesNet	1466000000	USD
CY2018Q4	us-gaap	Long Term Investments And Receivables Net LongTermInvestmentsAndReceivablesNet	513000000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	230000000	USD
CY2018Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	0	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	5447000000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	4865000000	USD
CY2019Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	150000000	USD
CY2018Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	158000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net Noncurrent DeferredTaxAssetsNetNoncurrent	19000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net Noncurrent DeferredTaxAssetsNetNoncurrent	445000000	USD
CY2019Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	295000000	USD
CY2018Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	134000000	USD
CY2019Q4	us-gaap	Assets Assets	11608000000	USD
CY2018Q4	us-gaap	Assets Assets	10982000000	USD
CY2019Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	1970000000	USD
CY2018Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	2454000000	USD
CY2019Q4	us-gaap	Due To Related Parties Current DueToRelatedPartiesCurrent	84000000	USD
CY2018Q4	us-gaap	Due To Related Parties Current DueToRelatedPartiesCurrent	81000000	USD
CY2019Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	336000000	USD
CY2018Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	440000000	USD
CY2019Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	116000000	USD
CY2018Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	118000000	USD
CY2019Q4	us-gaap	Interest Payable Current InterestPayableCurrent	45000000	USD
CY2018Q4	us-gaap	Interest Payable Current InterestPayableCurrent	39000000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	60000000	USD
CY2018Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	0	USD
CY2019Q4	us-gaap	Debt Current DebtCurrent	14000000	USD
CY2018Q4	us-gaap	Debt Current DebtCurrent	65000000	USD
CY2019Q4	us-gaap	Liabilities Current LiabilitiesCurrent	2625000000	USD
CY2018Q4	us-gaap	Liabilities Current LiabilitiesCurrent	3197000000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	177000000	USD
CY2018Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	0	USD
CY2019Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	3627000000	USD
CY2018Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	2316000000	USD
CY2019Q4	us-gaap	Pension And Other Postretirement And Postemployment Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent	532000000	USD
CY2018Q4	us-gaap	Pension And Other Postretirement And Postemployment Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent	980000000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	4000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	14000000	USD
CY2019Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	550000000	USD
CY2018Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	272000000	USD
CY2019Q4	us-gaap	Liabilities Liabilities	7515000000	USD
CY2018Q4	us-gaap	Liabilities Liabilities	6779000000	USD
CY2019Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2018Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2019Q4	us-gaap	Common Stock Value CommonStockValue	179000000	USD
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	177000000	USD
CY2019Q4	us-gaap	Treasury Stock Value TreasuryStockValue	173000000	USD
CY2018Q4	us-gaap	Treasury Stock Value TreasuryStockValue	78000000	USD
CY2019Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	4020000000	USD
CY2018Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	3917000000	USD
CY2019Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	544000000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1212000000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-478000000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1026000000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	4092000000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	4202000000	USD
CY2019Q4	us-gaap	Minority Interest MinorityInterest	1000000	USD
CY2018Q4	us-gaap	Minority Interest MinorityInterest	1000000	USD
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	11608000000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	10982000000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	-630000000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	1115000000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	387000000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	616000000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	521000000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	501000000	USD
CY2019	us-gaap	Deconsolidation Gain Or Loss Amount DeconsolidationGainOrLossAmount	0	USD
CY2018	us-gaap	Deconsolidation Gain Or Loss Amount DeconsolidationGainOrLossAmount	0	USD
CY2017	us-gaap	Deconsolidation Gain Or Loss Amount DeconsolidationGainOrLossAmount	72000000	USD
CY2019	x	Gainon Equity Investees Transactions GainonEquityInvesteesTransactions	0	USD
CY2018	x	Gainon Equity Investees Transactions GainonEquityInvesteesTransactions	38000000	USD
CY2017	x	Gainon Equity Investees Transactions GainonEquityInvesteesTransactions	2000000	USD
CY2019	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	275000000	USD
CY2018	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	0	USD
CY2017	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	31000000	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2018	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-98000000	USD
CY2017	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-54000000	USD
CY2019	x	Employee Benefits Costs Payments EmployeeBenefitsCostsPayments	-101000000	USD
CY2018	x	Employee Benefits Costs Payments EmployeeBenefitsCostsPayments	-77000000	USD
CY2017	x	Employee Benefits Costs Payments EmployeeBenefitsCostsPayments	16000000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	202000000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-329000000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-72000000	USD
CY2019	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	1000000	USD
CY2018	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	6000000	USD
CY2017	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	5000000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	74000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	6000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	USD
CY2018	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	47000000	USD
CY2017	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	32000000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-453000000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	312000000	USD
CY2017	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	36000000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-296000000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	374000000	USD
CY2017	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	117000000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-473000000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	282000000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	225000000	USD
CY2019	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-13000000	USD
CY2018	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	8000000	USD
CY2017	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	52000000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	96000000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	41000000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-32000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	682000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	938000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	826000000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1252000000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1001000000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	505000000	USD
CY2019	us-gaap	Payments For Proceeds From Businesses And Interest In Affiliates PaymentsForProceedsFromBusinessesAndInterestInAffiliates	710000000	USD
CY2018	us-gaap	Payments For Proceeds From Businesses And Interest In Affiliates PaymentsForProceedsFromBusinessesAndInterestInAffiliates	0	USD
CY2017	us-gaap	Payments For Proceeds From Businesses And Interest In Affiliates PaymentsForProceedsFromBusinessesAndInterestInAffiliates	0	USD
CY2019	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	4000000	USD
CY2018	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	10000000	USD
CY2017	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	5000000	USD
CY2019	us-gaap	Proceeds From Sale Of Equity Method Investments ProceedsFromSaleOfEquityMethodInvestments	0	USD
CY2018	us-gaap	Proceeds From Sale Of Equity Method Investments ProceedsFromSaleOfEquityMethodInvestments	30000000	USD
CY2017	us-gaap	Proceeds From Sale Of Equity Method Investments ProceedsFromSaleOfEquityMethodInvestments	116000000	USD
CY2019	us-gaap	Payments For Proceeds From Investments PaymentsForProceedsFromInvestments	0	USD
CY2018	us-gaap	Payments For Proceeds From Investments PaymentsForProceedsFromInvestments	2000000	USD
CY2017	us-gaap	Payments For Proceeds From Investments PaymentsForProceedsFromInvestments	2000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1958000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-963000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-386000000	USD
CY2019	x	Proceeds From Issuance Of Revolving Credit Facilities ProceedsFromIssuanceOfRevolvingCreditFacilities	860000000	USD
CY2018	x	Proceeds From Issuance Of Revolving Credit Facilities ProceedsFromIssuanceOfRevolvingCreditFacilities	228000000	USD
CY2017	x	Proceeds From Issuance Of Revolving Credit Facilities ProceedsFromIssuanceOfRevolvingCreditFacilities	0	USD
CY2019	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	100000000	USD
CY2018	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	0	USD
CY2017	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	0	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	702000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	640000000	USD
CY2017	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	737000000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	155000000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1299000000	USD
CY2017	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1127000000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	88000000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	75000000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	0	USD
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	35000000	USD
CY2017	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	20000000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	7000000	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	8000000	USD
CY2017	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	10000000	USD
CY2019	us-gaap	Payments Of Dividends PaymentsOfDividends	35000000	USD
CY2018	us-gaap	Payments Of Dividends PaymentsOfDividends	36000000	USD
CY2017	us-gaap	Payments Of Dividends PaymentsOfDividends	35000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1177000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-515000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-415000000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-2000000	USD
CY2018	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-17000000	USD
CY2017	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	17000000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-101000000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-557000000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	42000000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1040000000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1597000000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1555000000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	939000000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1040000000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1597000000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-82000000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	934000000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	1039000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-191000000	USD
CY2018	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	0	USD
CY2017	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxPortionAttributableToParent	1000000	USD
CY2018	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxPortionAttributableToParent	0	USD
CY2017	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxPortionAttributableToParent	0	USD
CY2019	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	Segment
CY2019	us-gaap	Use Of Estimates UseOfEstimates	<div style="line-height:120%;text-align:justify;padding-left:36px;font-size:10pt;"><span style="font-family:Arial;font-size:10pt;font-style:italic;font-weight:bold;">Use of estimates</span></div><div style="line-height:120%;text-align:justify;padding-left:36px;font-size:10pt;"><span style="font-family:Arial;font-size:10pt;">Generally accepted accounting principles require management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at year-end and the reported amounts of revenues and expenses during the year. Significant items subject to such estimates and assumptions include the carrying value of property, plant and equipment; intangible assets; valuation allowances for receivables, inventories and deferred income tax assets and liabilities; environmental liabilities; liabilities for potential tax deficiencies; potential litigation claims and settlements; assets and obligations related to employee benefits; put and call option assets and liabilities and restructuring and other charges. Actual results could differ materially from the estimates and assumptions used.</span></div>
CY2019Q4	us-gaap	Percentage Of Lifo Inventory PercentageOfLIFOInventory	0.75
CY2018Q4	us-gaap	Percentage Of Lifo Inventory PercentageOfLIFOInventory	0.74
CY2019	x	Portionof Salaried Employeesthat Receive Pension Benefits Througha Defined Contribution Pension Plan PortionofSalariedEmployeesthatReceivePensionBenefitsThroughaDefinedContributionPensionPlan	three-quarters
CY2019	x	Pension Corridor Percentage PensionCorridorPercentage	0.10
CY2019	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="line-height:120%;text-align:justify;padding-left:36px;font-size:10pt;"><span style="font-family:Arial;font-size:10pt;font-style:italic;font-weight:bold;">Reclassifications and Adjustments</span></div><div style="line-height:120%;text-align:justify;padding-left:36px;font-size:10pt;"><span style="font-family:Arial;font-size:10pt;">Certain reclassifications of prior years' data have been made to conform to the current year presentation including the following:</span></div><div style="line-height:120%;text-align:justify;padding-left:36px;font-size:11pt;"><span style="font-family:inherit;font-size:11pt;"><br/></span></div><div style="line-height:120%;text-align:justify;padding-left:36px;font-size:10pt;"><span style="font-family:Arial;font-size:10pt;">U. S. Steel reclassified certain prior year data as a result of the retrospective adoption on January 1, 2018 of ASU 2016-18, </span><span style="font-family:Arial;font-size:10pt;font-style:italic;">Statement of Cash Flows (Topic 230): Restricted Cash, </span><span style="font-family:Arial;font-size:10pt;">ASU 2016-15, </span><span style="font-family:Arial;font-size:10pt;font-style:italic;">Statement of Cash Flows: Classification of Certain Cash Receipts and Cash Payments </span><span style="font-family:Arial;font-size:10pt;">and</span><span style="font-family:Arial;font-size:10pt;font-style:italic;"> </span><span style="font-family:Arial;font-size:10pt;">ASU 2017-07, </span><span style="font-family:Arial;font-size:10pt;font-style:italic;">Compensation - Retirement Benefits</span><span style="font-family:Arial;font-size:10pt;">. See Note 3 for further details. </span></div><div style="line-height:120%;padding-top:12px;text-align:justify;font-size:10pt;"><span style="font-family:Arial;font-size:10pt;"><br/></span></div>
CY2019	us-gaap	Description Of New Accounting Pronouncements Not Yet Adopted DescriptionOfNewAccountingPronouncementsNotYetAdopted	<div style="line-height:120%;font-size:10pt;"><span style="font-family:Arial;font-size:10pt;font-weight:bold;">2. New Accounting Standards</span></div><div style="line-height:120%;font-size:10pt;"><span style="font-family:Arial;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-align:justify;padding-left:42px;font-size:10pt;"><span style="font-family:Arial;font-size:10pt;">In December 2019, the Financial Accounting Standards Board (FASB) Issued Accounting Standards Update 2019-12, </span><span style="font-family:Arial;font-size:10pt;font-style:italic;">Income Taxes (Topic 740) - Simplifying the Accounting for Income Taxes</span><span style="font-family:Arial;font-size:10pt;"> (ASU 2019-12). ASU 2019-12 simplifies accounting for income taxes by removing certain exceptions from the general principles in Topic 740 including elimination of the exception to the incremental approach for intraperiod tax allocation when there is a loss from continuing operations and income or a gain from other items such as other comprehensive income. ASU 2019-12 also clarifies and amends certain guidance in Topic 740. ASU 2019-12 is effective for public companies for fiscal years beginning after December 15, 2020, including interim periods, with early adoption of all amendments in the same period permitted. U. S. Steel is currently assessing the impact of the ASU, but does not believe it will have a material impact on its Consolidated Financial Statements. </span></div><div style="line-height:120%;text-align:justify;padding-left:42px;font-size:10pt;"><span style="font-family:Arial;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-align:justify;padding-left:42px;font-size:10pt;"><span style="font-family:Arial;font-size:10pt;">In June 2016, the FASB issued ASU 2016-13, </span><span style="font-family:Arial;font-size:10pt;font-style:italic;">Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments</span><span style="font-family:Arial;font-size:10pt;"> (ASU 2016-13), which adds an impairment model that is based on expected losses rather than incurred losses. Under ASU 2016-13, an entity recognizes as an allowance its estimate of expected credit losses, which the FASB believes will result in more timely recognition of such losses. ASU 2016-13 is effective for public companies for fiscal years beginning after December 15, 2019 including interim reporting periods, with early adoption permitted. U. S. Steel is in the process of adopting this ASU and does not expect it to have a significant impact on its Consolidated Financial Statements.</span></div>
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	12937000000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	79000000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	-230000000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	616000000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1252000000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	14178000000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	61000000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	1124000000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	521000000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1001000000	USD
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	12250000000	USD
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	44000000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	669000000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	501000000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	505000000	USD
CY2019Q4	us-gaap	Assets Assets	11608000000	USD
CY2018Q4	us-gaap	Assets Assets	10982000000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	12937000000	USD
CY2019Q4	us-gaap	Noncurrent Assets NoncurrentAssets	6719000000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	14178000000	USD
CY2018Q4	us-gaap	Noncurrent Assets NoncurrentAssets	5351000000	USD
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	12250000000	USD
CY2017Q4	us-gaap	Noncurrent Assets NoncurrentAssets	4737000000	USD
CY2019	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	Segment
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	12937000000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	14178000000	USD
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	12250000000	USD
CY2019	us-gaap	Investment Income Interest InvestmentIncomeInterest	17000000	USD
CY2018	us-gaap	Investment Income Interest InvestmentIncomeInterest	23000000	USD
CY2017	us-gaap	Investment Income Interest InvestmentIncomeInterest	17000000	USD
CY2019	us-gaap	Interest Costs Incurred InterestCostsIncurred	162000000	USD
CY2018	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	19000000	USD
CY2017	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-23000000	USD
CY2018	us-gaap	Interest Costs Incurred InterestCostsIncurred	175000000	USD
CY2017	us-gaap	Interest Costs Incurred InterestCostsIncurred	229000000	USD
CY2019	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	20000000	USD
CY2018	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	7000000	USD
CY2017	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	3000000	USD
CY2019	us-gaap	Interest Expense InterestExpense	142000000	USD
CY2018	us-gaap	Interest Expense InterestExpense	168000000	USD
CY2017	us-gaap	Interest Expense InterestExpense	226000000	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2018	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-98000000	USD
CY2017	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-54000000	USD
CY2019	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	91000000	USD
CY2018	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	69000000	USD
CY2017	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	61000000	USD
CY2019	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	17000000	USD
CY2019	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	5000000	USD
CY2018	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	5000000	USD
CY2017	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	6000000	USD
CY2019	x	Financial Costsfor Credit Facilities FinancialCostsforCreditFacilities	1000000	USD
CY2018	x	Financial Costsfor Credit Facilities FinancialCostsforCreditFacilities	3000000	USD
CY2017	x	Financial Costsfor Credit Facilities FinancialCostsforCreditFacilities	3000000	USD
CY2019	x	Financial Costs Other FinancialCostsOther	10000000	USD
CY2018	x	Financial Costs Other FinancialCostsOther	3000000	USD
CY2017	x	Financial Costs Other FinancialCostsOther	2000000	USD
CY2019	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	7000000	USD
CY2018	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	8000000	USD
CY2017	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	10000000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-6000000	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	0	USD
CY2017	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-44000000	USD
CY2019	x	Interest Income Expense And Other Financial Costs Net InterestIncomeExpenseAndOtherFinancialCostsNet	-222000000	USD
CY2018	x	Interest Income Expense And Other Financial Costs Net InterestIncomeExpenseAndOtherFinancialCostsNet	-312000000	USD
CY2017	x	Interest Income Expense And Other Financial Costs Net InterestIncomeExpenseAndOtherFinancialCostsNet	-368000000	USD
CY2018	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-98000000	USD
CY2017	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-54000000	USD
CY2019	x	Financial Costs Other Change In Fair Value FinancialCostsOtherChangeInFairValue	7000000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-630000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	1115000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	387000000	USD
CY2019	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	171418000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	176633000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	174793000	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	0	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	0	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	0	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1828000	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1727000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	171418000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	178461000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	176520000	shares
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-3.67
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	6.31
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.21
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-3.67
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	6.25
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.19
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	5109000	shares
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1631000	shares
CY2017	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1579000	shares
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	749000000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1000000000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1553000000	USD
CY2019Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	2000000	USD
CY2018Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	3000000	USD
CY2017Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	6000000	USD
CY2019Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	188000000	USD
CY2018Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	37000000	USD
CY2017Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	38000000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	939000000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1040000000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1597000000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-452000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	812000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	301000000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-18000000	USD
CY2019Q4	us-gaap	Inventory Raw Materials InventoryRawMaterials	628000000	USD
CY2018Q4	us-gaap	Inventory Raw Materials InventoryRawMaterials	605000000	USD
CY2019Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	720000000	USD
CY2018Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	1021000000	USD
CY2019Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	376000000	USD
CY2018Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	404000000	USD
CY2019Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	61000000	USD
CY2018Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	62000000	USD
CY2019Q4	us-gaap	Inventory Net InventoryNet	1785000000	USD
CY2018Q4	us-gaap	Inventory Net InventoryNet	2092000000	USD
CY2019Q4	us-gaap	Excess Of Replacement Or Current Costs Over Stated Lifo Value ExcessOfReplacementOrCurrentCostsOverStatedLIFOValue	735000000	USD
CY2018Q4	us-gaap	Excess Of Replacement Or Current Costs Over Stated Lifo Value ExcessOfReplacementOrCurrentCostsOverStatedLIFOValue	1038000000	USD
CY2019	us-gaap	Effect Of Lifo Inventory Liquidation On Income EffectOfLIFOInventoryLiquidationOnIncome	28000000	USD
CY2018	us-gaap	Effect Of Lifo Inventory Liquidation On Income EffectOfLIFOInventoryLiquidationOnIncome	10000000	USD
CY2017	us-gaap	Effect Of Lifo Inventory Liquidation On Income EffectOfLIFOInventoryLiquidationOnIncome	6000000	USD
CY2019Q4	us-gaap	Inventory Land Held For Development And Sale InventoryLandHeldForDevelopmentAndSale	40000000	USD
CY2018Q4	us-gaap	Inventory Land Held For Development And Sale InventoryLandHeldForDevelopmentAndSale	39000000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	196000000	USD
CY2019	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	178000000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-40000000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-283000000	USD
CY2018	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	-323000000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-66000000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-81000000	USD
CY2017	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	-147000000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	0	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	23000000	USD
CY2019	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	23000000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2000000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-58000000	USD
CY2018	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	-56000000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-1000000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0	USD
CY2017	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	-1000000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	-6000000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-17000000	USD
CY2019	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	-23000000	USD
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	64000000	USD
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	12000000	USD
CY2018	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	76000000	USD
CY2017	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	53000000	USD
CY2017	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	9000000	USD
CY2017	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	62000000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-24000000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	202000000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	178000000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	26000000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-329000000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-303000000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-14000000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-72000000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-86000000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-95000000	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	171000000	USD
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	105000000	USD
CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	334000000	USD
CY2018	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-412000000	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	36000000	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-46000000	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-48000000	USD
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-68000000	USD
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-36000000	USD
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	8000000	USD
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-28000000	USD
CY2019	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-23000000	USD
CY2018	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	74000000	USD
CY2017	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	62000000	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Contingencies Foreign IncomeTaxReconciliationTaxContingenciesForeign	25000000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Contingencies Foreign IncomeTaxReconciliationTaxContingenciesForeign	-21000000	USD
CY2017	us-gaap	Income Tax Reconciliation Tax Contingencies Foreign IncomeTaxReconciliationTaxContingenciesForeign	-6000000	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	-5000000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	71000000	USD
CY2017	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	56000000	USD
CY2019	x	Effective Income Tax Rate Reconciliation Effectof Tax Reform Amount EffectiveIncomeTaxRateReconciliationEffectofTaxReformAmount	0	USD
CY2018	x	Effective Income Tax Rate Reconciliation Effectof Tax Reform Amount EffectiveIncomeTaxRateReconciliationEffectofTaxReformAmount	0	USD
CY2017	x	Effective Income Tax Rate Reconciliation Effectof Tax Reform Amount EffectiveIncomeTaxRateReconciliationEffectofTaxReformAmount	-81000000	USD
CY2019	us-gaap	Income Tax Reconciliation Deductions Other IncomeTaxReconciliationDeductionsOther	0	USD
CY2018	us-gaap	Income Tax Reconciliation Deductions Other IncomeTaxReconciliationDeductionsOther	0	USD
CY2017	us-gaap	Income Tax Reconciliation Deductions Other IncomeTaxReconciliationDeductionsOther	48000000	USD
CY2019	us-gaap	Income Tax Reconciliation Prior Year Income Taxes IncomeTaxReconciliationPriorYearIncomeTaxes	7000000	USD
CY2018	us-gaap	Income Tax Reconciliation Prior Year Income Taxes IncomeTaxReconciliationPriorYearIncomeTaxes	0	USD
CY2017	us-gaap	Income Tax Reconciliation Prior Year Income Taxes IncomeTaxReconciliationPriorYearIncomeTaxes	0	USD
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	7000000	USD
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-4000000	USD
CY2017	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-2000000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	178000000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-303000000	USD
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CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
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CY2017	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	10000000	USD
CY2017	x	Effective Tax Rate Reconciliation Reveralof Valulation Allowance Relatedto Amt Credits EffectiveTaxRateReconciliationReveralofValulationAllowanceRelatedtoAMTCredits	71000000	USD
CY2017	us-gaap	Income Tax Reconciliation Deductions IncomeTaxReconciliationDeductions	48000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	176000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	220000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	18000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	16000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	19000000	USD
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CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards General Business DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness	85000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards General Business DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness	85000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Foreign DeferredTaxAssetsTaxCreditCarryforwardsForeign	170000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Foreign DeferredTaxAssetsTaxCreditCarryforwardsForeign	173000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	173000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	337000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Contingencies DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsContingencies	71000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Contingencies DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsContingencies	62000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Equity Method Investments DeferredTaxAssetsEquityMethodInvestments	49000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Equity Method Investments DeferredTaxAssetsEquityMethodInvestments	59000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	32000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	0	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Other DeferredTaxAssetsTaxDeferredExpenseOther	35000000	USD
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CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	563000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	214000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	422000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	972000000	USD
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CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	468000000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Capitalized Inventory Costs DeferredTaxLiabilitiesDeferredExpenseCapitalizedInventoryCosts	0	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Capitalized Inventory Costs DeferredTaxLiabilitiesDeferredExpenseCapitalizedInventoryCosts	22000000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Reserves And Accruals DeferredTaxLiabilitiesDeferredExpenseReservesAndAccruals	17000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Reserves And Accruals DeferredTaxLiabilitiesDeferredExpenseReservesAndAccruals	33000000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	19000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	18000000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	3000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	0	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	407000000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	541000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	15000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	431000000	USD
CY2019	x	Non Cash Tax Expense Benefit Resulting From Deferred Tax Assets Not Expected To Be Realized NonCashTaxExpenseBenefitResultingFromDeferredTaxAssetsNotExpectedToBeRealized	334000000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	3000000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	35000000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	42000000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	2000000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	2000000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	35000000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	42000000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	72000000	USD
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CY2018	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
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CY2018	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	5000000	USD
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CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	3000000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	35000000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	42000000	USD
CY2019Q4	us-gaap	Equity Method Investments EquityMethodInvestments	1272000000	USD
CY2018Q4	us-gaap	Equity Method Investments EquityMethodInvestments	485000000	USD
CY2019Q4	us-gaap	Accounts Receivable Net Noncurrent AccountsReceivableNetNoncurrent	191000000	USD
CY2018Q4	us-gaap	Accounts Receivable Net Noncurrent AccountsReceivableNetNoncurrent	24000000	USD
CY2019Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	3000000	USD
CY2018Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	4000000	USD
CY2019Q4	us-gaap	Long Term Investments And Receivables Net LongTermInvestmentsAndReceivablesNet	1466000000	USD
CY2018Q4	us-gaap	Long Term Investments And Receivables Net LongTermInvestmentsAndReceivablesNet	513000000	USD
CY2019	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	2528000000	USD
CY2018	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	2193000000	USD
CY2017	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	2485000000	USD
CY2019	us-gaap	Equity Method Investment Summarized Financial Information Income Loss From Continuing Operations Before Extraordinary Items EquityMethodInvestmentSummarizedFinancialInformationIncomeLossFromContinuingOperationsBeforeExtraordinaryItems	253000000	USD
CY2018	us-gaap	Equity Method Investment Summarized Financial Information Income Loss From Continuing Operations Before Extraordinary Items EquityMethodInvestmentSummarizedFinancialInformationIncomeLossFromContinuingOperationsBeforeExtraordinaryItems	157000000	USD
CY2017	us-gaap	Equity Method Investment Summarized Financial Information Income Loss From Continuing Operations Before Extraordinary Items EquityMethodInvestmentSummarizedFinancialInformationIncomeLossFromContinuingOperationsBeforeExtraordinaryItems	132000000	USD
CY2019	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	235000000	USD
CY2018	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	134000000	USD
CY2017	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	109000000	USD
CY2019Q4	us-gaap	Equity Method Investment Summarized Financial Information Current Assets EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets	1144000000	USD
CY2018Q4	us-gaap	Equity Method Investment Summarized Financial Information Current Assets EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets	642000000	USD
CY2017Q4	us-gaap	Equity Method Investment Summarized Financial Information Current Assets EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets	633000000	USD
CY2019Q4	us-gaap	Equity Method Investment Summarized Financial Information Noncurrent Assets EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets	2976000000	USD
CY2018Q4	us-gaap	Equity Method Investment Summarized Financial Information Noncurrent Assets EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets	853000000	USD
CY2017Q4	us-gaap	Equity Method Investment Summarized Financial Information Noncurrent Assets EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets	710000000	USD
CY2019Q4	us-gaap	Equity Method Investment Summarized Financial Information Current Liabilities EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities	573000000	USD
CY2018Q4	us-gaap	Equity Method Investment Summarized Financial Information Current Liabilities EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities	348000000	USD
CY2017Q4	us-gaap	Equity Method Investment Summarized Financial Information Current Liabilities EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities	441000000	USD
CY2019Q4	us-gaap	Equity Method Investment Summarized Financial Information Noncurrent Liabilities EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilities	2542000000	USD
CY2018Q4	us-gaap	Equity Method Investment Summarized Financial Information Noncurrent Liabilities EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilities	516000000	USD
CY2017Q4	us-gaap	Equity Method Investment Summarized Financial Information Noncurrent Liabilities EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilities	335000000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	79000000	USD
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CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	44000000	USD
CY2019	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	5000000	USD
CY2018	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	13000000	USD
CY2017	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	12000000	USD
CY2019Q4	us-gaap	Land Land	202000000	USD
CY2018Q4	us-gaap	Land Land	207000000	USD
CY2019Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	1105000000	USD
CY2018Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	1098000000	USD
CY2019Q4	x	Steel Producing Equipment Gross SteelProducingEquipmentGross	13658000000	USD
CY2018Q4	x	Steel Producing Equipment Gross SteelProducingEquipmentGross	12784000000	USD
CY2019Q4	x	Transportation Equipment Gross TransportationEquipmentGross	280000000	USD
CY2018Q4	x	Transportation Equipment Gross TransportationEquipmentGross	268000000	USD
CY2019Q4	x	Other Machineryand Equipment Gross OtherMachineryandEquipmentGross	129000000	USD
CY2018Q4	x	Other Machineryand Equipment Gross OtherMachineryandEquipmentGross	123000000	USD
CY2019Q4	x	Information Technology Assets Gross InformationTechnologyAssetsGross	787000000	USD
CY2018Q4	x	Information Technology Assets Gross InformationTechnologyAssetsGross	786000000	USD
CY2019Q4	x	Finance Lease Rightof Use Asset Gross FinanceLeaseRightofUseAssetGross	83000000	USD
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CY2019Q4	x	Construction In Process ConstructionInProcess	833000000	USD
CY2018Q4	x	Construction In Process ConstructionInProcess	706000000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	17077000000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	16008000000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	11630000000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	11143000000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	5447000000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	4865000000	USD
CY2019Q4	x	Finance Lease And Sale Leaseback Transactions Accumulated Depreciation And Depletion FinanceLeaseAndSaleLeasebackTransactionsAccumulatedDepreciationAndDepletion	27000000	USD
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CY2019	x	Share Based Compensation Expense Per Share Diluted ShareBasedCompensationExpensePerShareDiluted	0.15
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CY2019Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	168000000	USD
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CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	75000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	168000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	85000000	USD
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CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	8000000	USD
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CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	26000000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	32000000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	27000000	USD
CY2019	x	Share Based Compensation Expense Per Share Basic ShareBasedCompensationExpensePerShareBasic	0.15
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CY2019Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	16000000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P18M
CY2017	x	Share Based Compensation Arrangement By Share Based Payment Award Grant Date Price ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantDatePrice	36.94
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CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	27000000	USD
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	11000000	USD
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	35000000	USD
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	2107957	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	30.92
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	1743490	shares
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	24.46
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	1156341	shares
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	18.26
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CY2019	x	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Adjustments In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsInPeriodWeightedAverageGrantDateFairValue	10.02
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	254454	shares
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	30.45
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	2632984	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	30.72
CY2019	x	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Percentage Adjustments In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPercentageAdjustmentsInPeriod	1
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	21000000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	14000000	USD
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	11000000	USD
CY2018	us-gaap	Derivative Remaining Maturity1 DerivativeRemainingMaturity1	P12M
CY2019	us-gaap	Derivative Net Hedge Ineffectiveness Gain Loss DerivativeNetHedgeIneffectivenessGainLoss	1000000	USD
CY2019Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	3779000000	USD
CY2018Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	2407000000	USD
CY2019Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	138000000	USD
CY2018Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	26000000	USD
CY2019Q4	us-gaap	Debt Current DebtCurrent	14000000	USD
CY2018Q4	us-gaap	Debt Current DebtCurrent	65000000	USD
CY2019Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	3627000000	USD
CY2018Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	2316000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	14000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	12000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	17000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	399000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	664000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	2673000000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	3779000000	USD
CY2019	x	Portion Of Employees Included In Multiemployer Plan PortionOfEmployeesIncludedInMultiemployerPlan	three-quarters
CY2019	x	Portionof Represented Employees Coveredby Spt PortionofRepresentedEmployeesCoveredbySPT	two-thirds
CY2018Q4	us-gaap	Defined Benefit Pension Plan Current And Noncurrent Liabilities DefinedBenefitPensionPlanCurrentAndNoncurrentLiabilities	26000000	USD
CY2019Q4	x	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansTax	800000000	USD
CY2018Q4	x	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansTax	991000000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation DefinedBenefitPlanAccumulatedBenefitObligation	5636000000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation DefinedBenefitPlanAccumulatedBenefitObligation	5454000000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Accumulated Benefit Obligation DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation	5636000000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Accumulated Benefit Obligation DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation	5454000000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Projected Benefit Obligation DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation	5822000000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Projected Benefit Obligation DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation	5626000000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Fair Value Of Plan Assets DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets	5406000000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Fair Value Of Plan Assets DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets	4960000000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Health Care Cost Trend Rate Assumed Next Fiscal Year DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear	0.0650
CY2018Q4	us-gaap	Defined Benefit Plan Health Care Cost Trend Rate Assumed Next Fiscal Year DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear	0.0700
CY2019Q4	us-gaap	Defined Benefit Plan Ultimate Health Care Cost Trend Rate1 DefinedBenefitPlanUltimateHealthCareCostTrendRate1	0.0450
CY2018Q4	us-gaap	Defined Benefit Plan Ultimate Health Care Cost Trend Rate1 DefinedBenefitPlanUltimateHealthCareCostTrendRate1	0.0500
CY2019	x	Portionof Costsfor Retiree Health Benefits Limitedtoa Per Capital Dollar Maximum PortionofCostsforRetireeHealthBenefitsLimitedtoaPerCapitalDollarMaximum	three quarters
CY2019	x	Employee Identification And Pension Plan Number EmployeeIdentificationAndPensionPlanNumber	23-6648508/499
CY2019	us-gaap	Multiemployer Plans Certified Zone Status MultiemployerPlansCertifiedZoneStatus	Green
CY2018	us-gaap	Multiemployer Plans Certified Zone Status MultiemployerPlansCertifiedZoneStatus	Green
CY2019	us-gaap	Multiemployer Plans Funding Improvement Plan And Rehabilitation Plan MultiemployerPlansFundingImprovementPlanAndRehabilitationPlan	No
CY2019	us-gaap	Multiemployer Plan Contributions By Employer MultiemployerPlanContributionsByEmployer	77000000	USD
CY2018	us-gaap	Multiemployer Plan Contributions By Employer MultiemployerPlanContributionsByEmployer	60000000	USD
CY2017	us-gaap	Multiemployer Plan Contributions By Employer MultiemployerPlanContributionsByEmployer	59000000	USD
CY2019	us-gaap	Multiemployer Plans Surcharge MultiemployerPlansSurcharge	No
CY2018	us-gaap	Multiemployer Plans Surcharge MultiemployerPlansSurcharge	No
CY2019	us-gaap	Multiemployer Plans Collective Bargaining Arrangement Expiration Date MultiemployerPlansCollectiveBargainingArrangementExpirationDate	2022-09-01
CY2019	x	Defined Contribution Plan Eligible Amount Contributed Per Hour DefinedContributionPlanEligibleAmountContributedPerHour	0.50	USD
CY2019Q1	x	Defined Contribution Plan Eligible Amount Contributed Per Hour DefinedContributionPlanEligibleAmountContributedPerHour	0.55	USD
CY2019Q4	x	Postemployment Benefit Plan Assumption Used Calculating Benefit Obligation Discount Rate PostemploymentBenefitPlanAssumptionUsedCalculatingBenefitObligationDiscountRate	0.0340
CY2018Q4	x	Postemployment Benefit Plan Assumption Used Calculating Benefit Obligation Discount Rate PostemploymentBenefitPlanAssumptionUsedCalculatingBenefitObligationDiscountRate	0.0436
CY2019Q4	x	Other Postemployment Plans Future Projected Benefit Cost OtherPostemploymentPlansFutureProjectedBenefitCost	15000000	USD
CY2019	x	Other Postemployment Benefits Net Periodic Benefit Cost OtherPostemploymentBenefitsNetPeriodicBenefitCost	21000000	USD
CY2018	x	Other Postemployment Benefits Net Periodic Benefit Cost OtherPostemploymentBenefitsNetPeriodicBenefitCost	10000000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-845000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-315000000	USD
CY2018	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-134000000	USD
CY2018Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	60000000	USD
CY2017Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	69000000	USD
CY2019	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	4000000	USD
CY2018	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	0	USD
CY2019	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	9000000	USD
CY2018	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	12000000	USD
CY2019	x	Asset Retirement Obligation Accretion Expense Accrued AssetRetirementObligationAccretionExpenseAccrued	3000000	USD
CY2018	x	Asset Retirement Obligation Accretion Expense Accrued AssetRetirementObligationAccretionExpenseAccrued	3000000	USD
CY2019Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	58000000	USD
CY2018Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	60000000	USD
CY2019	x	Financial Costs Other Change In Fair Value FinancialCostsOtherChangeInFairValue	7000000	USD
CY2019	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Earnings FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings	-7000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-181000000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1026000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	405000000	USD
CY2019	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-143000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	548000000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-478000000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	151000000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	207000000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	242000000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-38000000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	39000000	USD
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	40000000	USD
CY2019	x	Change In Accrued Capital Expenditures ChangeInAccruedCapitalExpenditures	-70000000	USD
CY2018	x	Change In Accrued Capital Expenditures ChangeInAccruedCapitalExpenditures	135000000	USD
CY2017	x	Change In Accrued Capital Expenditures ChangeInAccruedCapitalExpenditures	208000000	USD
CY2019	us-gaap	Stock Issued1 StockIssued1	19000000	USD
CY2018	us-gaap	Stock Issued1 StockIssued1	21000000	USD
CY2017	us-gaap	Stock Issued1 StockIssued1	49000000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	46000000	USD
CY2018	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	0	USD
CY2017	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	0	USD
CY2019	x	Big River Steelputandcalloptions BigRiverSteelputandcalloptions	21000000	USD
CY2018	x	Big River Steelputandcalloptions BigRiverSteelputandcalloptions	0	USD
CY2017	x	Big River Steelputandcalloptions BigRiverSteelputandcalloptions	0	USD
CY2019	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	1431000000	USD
CY2018	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	1420000000	USD
CY2017	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	1204000000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	230000000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	60000000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	177000000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	230000000	USD
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	56000000	USD
CY2019Q4	x	Lease Rightof Use Asset LeaseRightofUseAsset	286000000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	60000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	11000000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	177000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	51000000	USD
CY2019Q4	x	Lease Liability LeaseLiability	299000000	USD
CY2019Q4	x	Operating Lease Rightof Use Asset Accumulated Amortization OperatingLeaseRightofUseAssetAccumulatedAmortization	50000000	USD
CY2019Q4	x	Finance Lease Rightof Use Asset Accumulated Depreciation FinanceLeaseRightofUseAssetAccumulatedDepreciation	27000000	USD
CY2019Q4	x	Operating Lease Rightof Use Asset Liability Adjustments OperatingLeaseRightofUseAssetLiabilityAdjustments	7000000	USD
CY2019Q4	x	Operating Lease Rightof Use Asset Liability Retirements OperatingLeaseRightofUseAssetLiabilityRetirements	4000000	USD
CY2019	x	Finance Lease Right Of Use Asset Depreciation Depletion And Amortization FinanceLeaseRightOfUseAssetDepreciationDepletionAndAmortization	7000000	USD
CY2019	x	Finance Lease Right Of Use Asset Interest FinanceLeaseRightOfUseAssetInterest	3000000	USD
CY2019	us-gaap	Lease Cost LeaseCost	102000000	USD
CY2019	us-gaap	Variable Lease Cost VariableLeaseCost	15000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	74000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Remainder Of Fiscal Year FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear	15000000	USD
CY2019Q4	x	Operating And Finance Lease Liability Payments Remainderof Fiscal Year OperatingAndFinanceLeaseLiabilityPaymentsRemainderofFiscalYear	89000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	58000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	14000000	USD
CY2019Q4	x	Operating And Finance Lease Liability Payments Due Year Two OperatingAndFinanceLeaseLiabilityPaymentsDueYearTwo	72000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	46000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	18000000	USD
CY2019Q4	x	Operating And Finance Lease Liability Payments Due Year Three OperatingAndFinanceLeaseLiabilityPaymentsDueYearThree	64000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	34000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	7000000	USD
CY2019Q4	x	Operating And Finance Lease Liability Payments Due Year Four OperatingAndFinanceLeaseLiabilityPaymentsDueYearFour	41000000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	237000000	USD
CY2019Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	62000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	26000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	6000000	USD
CY2019Q4	x	Operating And Finance Lease Liability Payments Due Year Five OperatingAndFinanceLeaseLiabilityPaymentsDueYearFive	32000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	51000000	USD
CY2019Q4	x	Operating And Finance Lease Liability OperatingAndFinanceLeaseLiability	299000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	12000000	USD
CY2019Q4	x	Operating And Finance Lease Liability Payments Dueafter Year Five OperatingAndFinanceLeaseLiabilityPaymentsDueafterYearFive	63000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	289000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	72000000	USD
CY2019Q4	x	Operating And Finance Lease Liability Payments Due OperatingAndFinanceLeaseLiabilityPaymentsDue	361000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	52000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	10000000	USD
CY2019Q4	x	Operating And Finance Lease Liability Undiscounted Excess Amount OperatingAndFinanceLeaseLiabilityUndiscountedExcessAmount	62000000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due Current CapitalLeasesFutureMinimumPaymentsDueCurrent	5000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	66000000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due In Two Years CapitalLeasesFutureMinimumPaymentsDueInTwoYears	5000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	55000000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due In Three Years CapitalLeasesFutureMinimumPaymentsDueInThreeYears	5000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	45000000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due In Four Years CapitalLeasesFutureMinimumPaymentsDueInFourYears	11000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	37000000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due In Five Years CapitalLeasesFutureMinimumPaymentsDueInFiveYears	0	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	28000000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due Thereafter CapitalLeasesFutureMinimumPaymentsDueThereafter	0	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	72000000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due CapitalLeasesFutureMinimumPaymentsDue	26000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	303000000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Interest Included In Payments CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments	4000000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Present Value Of Net Minimum Payments CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments	22000000	USD
CY2019Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P5Y
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P5Y
CY2019Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0605
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0776
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	72000000	USD
CY2019	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	3000000	USD
CY2019	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	7000000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	53000000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	46000000	USD
CY2019	us-gaap	Restructuring Charges RestructuringCharges	275000000	USD
CY2019	x	Business Exit And Severance Costs BusinessExitAndSeveranceCosts	35000000	USD
CY2018	x	Business Exit And Severance Costs BusinessExitAndSeveranceCosts	21000000	USD
CY2017	us-gaap	Restructuring Charges RestructuringCharges	31000000	USD
CY2017	us-gaap	Restructuring Reserve Accrual Adjustment1 RestructuringReserveAccrualAdjustment1	-6000000	USD
CY2017	x	Business Exit And Severance Costs BusinessExitAndSeveranceCosts	32000000	USD
CY2017Q4	us-gaap	Restructuring Reserve RestructuringReserve	38000000	USD
CY2018	us-gaap	Payments For Restructuring PaymentsForRestructuring	21000000	USD
CY2018Q4	us-gaap	Restructuring Reserve RestructuringReserve	17000000	USD
CY2019	us-gaap	Restructuring Charges RestructuringCharges	275000000	USD
CY2019	us-gaap	Payments For Restructuring PaymentsForRestructuring	80000000	USD
CY2019Q4	us-gaap	Restructuring Reserve RestructuringReserve	212000000	USD
CY2019Q4	us-gaap	Restructuring Reserve RestructuringReserve	212000000	USD
CY2018Q4	us-gaap	Restructuring Reserve RestructuringReserve	17000000	USD
CY2018	us-gaap	Loss Contingency Claims Dismissed Number LossContingencyClaimsDismissedNumber	1000
CY2018Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	187000000	USD
CY2017Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	179000000	USD
CY2019	us-gaap	Accrual For Environmental Loss Contingencies Charges To Expense For New Losses AccrualForEnvironmentalLossContingenciesChargesToExpenseForNewLosses	20000000	USD
CY2018	us-gaap	Accrual For Environmental Loss Contingencies Charges To Expense For New Losses AccrualForEnvironmentalLossContingenciesChargesToExpenseForNewLosses	14000000	USD
CY2019	us-gaap	Accrual For Environmental Loss Contingencies Payments1 AccrualForEnvironmentalLossContingenciesPayments1	21000000	USD
CY2018	us-gaap	Accrual For Environmental Loss Contingencies Payments1 AccrualForEnvironmentalLossContingenciesPayments1	6000000	USD
CY2019Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	186000000	USD
CY2018Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	187000000	USD
CY2019Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	186000000	USD
CY2018Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	187000000	USD
CY2019Q4	us-gaap	Accrued Capping Closure Post Closure And Environmental Costs Noncurrent AccruedCappingClosurePostClosureAndEnvironmentalCostsNoncurrent	23000000	USD
CY2019Q4	x	Accrued Liabilities Administrative And Legal Costs AccruedLiabilitiesAdministrativeAndLegalCosts	11000000	USD
CY2019	x	Numberofyearsofprojectedadministrativeandlegalcostsincludedinaccrual Numberofyearsofprojectedadministrativeandlegalcostsincludedinaccrual	P3Y
CY2019	us-gaap	Environmental Costs Recognized Capitalized In Period EnvironmentalCostsRecognizedCapitalizedInPeriod	123000000	USD
CY2018	us-gaap	Environmental Costs Recognized Capitalized In Period EnvironmentalCostsRecognizedCapitalizedInPeriod	125000000	USD
CY2019	x	Final Allocationfor Emissions Allowances FinalAllocationforEmissionsAllowances	48000000	Allowances
CY2019Q4	x	Emissions Allowances Purchased EmissionsAllowancesPurchased	11700000	Allowances
CY2019	x	Costof Emissions Allowances Purchased CostofEmissionsAllowancesPurchased	132000000
CY2019	x	Costof Emissions Allowances Purchased CostofEmissionsAllowancesPurchased	148000000	USD
CY2019	x	Total Shortfall Of Allowances TotalShortfallOfAllowances	12500000	Allowances
CY2019Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	186000000	USD
CY2019Q4	us-gaap	Guarantee Obligations Maximum Exposure GuaranteeObligationsMaximumExposure	4000000	USD
CY2019Q4	us-gaap	Leveraged Leases Net Investment In Leveraged Leases Disclosure Residual Value Of Leased Assets LeveragedLeasesNetInvestmentInLeveragedLeasesDisclosureResidualValueOfLeasedAssets	23000000	USD
CY2019Q4	x	Leveragedleases Net Investmentin Leveraged Leases Residual Value Liability Recorded LeveragedleasesNetInvestmentinLeveragedLeasesResidualValueLiabilityRecorded	0	USD
CY2019Q4	us-gaap	Restricted Cash And Investments RestrictedCashAndInvestments	190000000	USD
CY2018Q4	us-gaap	Restricted Cash And Investments RestrictedCashAndInvestments	40000000	USD
CY2019Q4	x	Contractual Property Plant And Equipment Commitments ContractualPropertyPlantAndEquipmentCommitments	880000000	USD
CY2019Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On First Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary	430000000	USD
CY2019Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Second Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary	404000000	USD
CY2019Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Third Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary	337000000	USD
CY2019Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Fourth Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary	338000000	USD
CY2019Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Fifth Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary	107000000	USD
CY2019Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Due After Five Years UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears	611000000	USD
CY2019Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance Sheet Amount UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount	2227000000	USD
CY2019	us-gaap	Unrecorded Unconditional Purchase Obligation Purchases UnrecordedUnconditionalPurchaseObligationPurchases	653000000	USD
CY2018	us-gaap	Unrecorded Unconditional Purchase Obligation Purchases UnrecordedUnconditionalPurchaseObligationPurchases	600000000	USD
CY2017	us-gaap	Unrecorded Unconditional Purchase Obligation Purchases UnrecordedUnconditionalPurchaseObligationPurchases	576000000	USD
CY2018Q4	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	300000000	USD
CY2019	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	5289475	shares
CY2018	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	2760112	shares
CY2019	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	88000000	USD
CY2018	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	75000000	USD

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$X
UNITED STATES STEEL CORP Stock $x

2020 Q1 Form 10-K Financial Statement

#000116330220000012 Filed on February 14, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$X UNITED STATES STEEL CORP Stock $x

2020 Q1 Form 10-K Financial Statement

#000116330220000012 Filed on February 14, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$X
UNITED STATES STEEL CORP Stock $x