$BTU
PEABODY ENERGY CORP Stock $btu

$btu Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-K Financial Statement

#000106472822000008 Filed on February 18, 2022

Income Statement

Concept	2021 Q4	2021	2020 Q4
Revenue	$1.265B	$3.318B	$737.2M
YoY Change	71.54%	15.17%	-34.03%
Cost Of Revenue	$709.7M	$2.553B	$638.2M
YoY Change	11.2%	1.12%	-22.53%
Gross Profit	$554.9M	$765.2M	$99.00M
YoY Change	460.51%	114.82%	-66.28%
Gross Profit Margin	43.88%	23.06%	13.43%
Selling, General & Admin	$20.10M	$84.90M	$21.90M
YoY Change	-8.22%	-14.67%	-57.06%
% of Gross Profit	3.62%	11.1%	22.12%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$85.40M	$308.7M	$79.50M
YoY Change	7.42%	-10.78%	-34.62%
% of Gross Profit	15.39%	40.34%	80.3%
Operating Expenses	$105.5M	$84.90M	$101.4M
YoY Change	4.04%	-14.67%	-41.25%
Operating Profit	$449.4M	$432.2M	-$2.400M
YoY Change	-18825.0%	-125.01%	-98.55%
Interest Expense	$32.90M	$183.4M	-$69.60M
YoY Change	-147.27%	31.19%	-289.13%
% of Operating Profit	7.32%	42.43%
Other Income/Expense, Net	$55.70M	$81.70M	$28.20M
YoY Change	97.52%	1084.06%	-139.06%
Pretax Income	$540.8M	$370.2M	-$115.1M
YoY Change	-569.85%	-119.99%	-57.4%
Income Tax	$33.10M	$22.80M	$5.300M
% Of Pretax Income	6.12%	6.16%
Net Earnings	$513.0M	$371.4M	-$129.2M
YoY Change	-497.06%	-119.82%	-55.42%
Net Earnings / Revenue	40.57%	11.19%	-17.53%
Basic Earnings Per Share		$3.24
Diluted Earnings Per Share	$3.848M	$3.22	-$1.318M
COMMON SHARES
Basic Shares Outstanding	127.4M shares	111.1M shares	97.80M shares
Diluted Shares Outstanding		112.0M shares

Balance Sheet

Concept	2021 Q4	2021	2020 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$954.3M	$954.3M	$709.0M
YoY Change	34.6%	34.6%	-3.14%
Cash & Equivalents	$954.3M	$954.3M	$709.2M
Short-Term Investments
Other Short-Term Assets	$270.2M	$270.2M	$204.7M
YoY Change	32.0%	31.8%	-7.25%
Inventory	$226.7M	$226.7M	$261.6M
Prepaid Expenses
Receivables	$350.5M	$350.5M	$244.8M
Other Receivables	$43.50M	$0.00	$63.90M
Total Short-Term Assets	$1.802B	$1.802B	$1.420B
YoY Change	26.85%	26.88%	-12.0%
LONG-TERM ASSETS
Property, Plant & Equipment	$2.951B	$2.986B	$3.051B
YoY Change	-3.29%	-3.71%	-34.79%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$62.20M	$99.80M	$24.60M
YoY Change	152.85%	3.96%	-56.77%
Other Assets	$162.0M	$0.00	$140.9M
YoY Change	14.98%	-100.0%	1.29%
Total Long-Term Assets	$3.148B	$3.148B	$3.247B
YoY Change	-3.04%	-3.05%	-34.13%
TOTAL ASSETS
Total Short-Term Assets	$1.802B	$1.802B	$1.420B
Total Long-Term Assets	$3.148B	$3.148B	$3.247B
Total Assets	$4.950B	$4.950B	$4.667B
YoY Change	6.06%	6.06%	-28.67%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$747.9M	$201.7M	$581.0M
YoY Change	28.73%	38.15%	-28.27%
Accrued Expenses	$34.20M	$320.4M	$40.00M
YoY Change	-14.5%	12.82%	33.33%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$29.50M	$0.00
YoY Change		1375.0%
Long-Term Debt Due	$59.60M	$59.60M	$45.00M
YoY Change	32.44%	32.44%	150.0%
Total Short-Term Liabilities	$931.7M	$931.7M	$790.6M
YoY Change	17.85%	17.79%	-18.94%
LONG-TERM LIABILITIES
Long-Term Debt	$1.078B	$1.078B	$1.503B
YoY Change	-28.26%	-28.26%	16.24%
Other Long-Term Liabilities	$197.7M	$1.092B	$251.5M
YoY Change	-21.39%	-19.54%	-8.01%
Total Long-Term Liabilities	$197.7M	$2.170B	$251.5M
YoY Change	-21.39%	-24.13%	-8.01%
TOTAL LIABILITIES
Total Short-Term Liabilities	$931.7M	$931.7M	$790.6M
Total Long-Term Liabilities	$197.7M	$2.170B	$251.5M
Total Liabilities	$3.129B	$3.188B	$3.686B
YoY Change	-15.11%	-14.71%	-4.77%
SHAREHOLDERS EQUITY
Retained Earnings	-$913.2M		-$1.273B
YoY Change	-28.28%		-313.28%
Common Stock	$3.746B		$3.365B
YoY Change	11.32%		0.4%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$1.370B		$1.369B
YoY Change	0.1%		0.12%
Treasury Stock Shares	43.00M shares		42.70M shares
Shareholders Equity	$1.762B	$1.762B	$929.6M
YoY Change
Total Liabilities & Shareholders Equity	$4.950B	$4.950B	$4.667B
YoY Change	6.06%	6.06%	-28.67%

Cashflow Statement

Concept	2021 Q4	2021	2020 Q4
OPERATING ACTIVITIES
Net Income	$513.0M	$371.4M	-$129.2M
YoY Change	-497.06%	-119.82%	-55.42%
Depreciation, Depletion And Amortization	$85.40M	$308.7M	$79.50M
YoY Change	7.42%	-10.78%	-34.62%
Cash From Operating Activities	$438.4M	$420.0M	$22.40M
YoY Change	1857.14%	-4429.9%	-82.05%
INVESTING ACTIVITIES
Capital Expenditures	-$59.50M	$183.1M	-$59.50M
YoY Change	0.0%	-4.34%	-42.01%
Acquisitions		$0.00
YoY Change
Other Investing Activities	$47.70M	$3.000M	$12.20M
YoY Change	290.98%	650.0%	-209.91%
Cash From Investing Activities	-$11.80M	-$131.5M	-$47.30M
YoY Change	-75.05%	-36.38%	-58.4%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		-$269.8M
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-59.30M	-$43.40M	-80.50M
YoY Change	-26.34%	-122.44%	-11.83%
NET CHANGE
Cash From Operating Activities	438.4M	$420.0M	22.40M
Cash From Investing Activities	-11.80M	-$131.5M	-47.30M
Cash From Financing Activities	-59.30M	-$43.40M	-80.50M
Net Change In Cash	367.3M	$245.1M	-105.4M
YoY Change	-448.48%	-1165.65%	31.42%
FREE CASH FLOW
Cash From Operating Activities	$438.4M	$420.0M	$22.40M
Capital Expenditures	-$59.50M	$183.1M	-$59.50M
Free Cash Flow	$497.9M	$236.9M	$81.90M
YoY Change	507.94%	-217.8%	-63.98%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021	dei	Entity Central Index Key EntityCentralIndexKey	0001064728
CY2021	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
CY2021	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2021	dei	Amendment Flag AmendmentFlag	false
CY2021Q4	us-gaap	Operating Lease Liability Current Statement Of Financial Position Extensible List OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#AccountsPayableAndAccruedLiabilitiesCurrent
CY2020Q4	us-gaap	Operating Lease Liability Current Statement Of Financial Position Extensible List OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#AccountsPayableAndAccruedLiabilitiesCurrent
CY2021Q4	us-gaap	Finance Lease Liability Statement Of Financial Position Extensible List FinanceLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#LongTermDebtAndCapitalLeaseObligations
CY2020Q4	us-gaap	Finance Lease Liability Statement Of Financial Position Extensible List FinanceLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#LongTermDebtAndCapitalLeaseObligations
CY2021	dei	Document Type DocumentType	10-K
CY2021	dei	Document Annual Report DocumentAnnualReport	true
CY2021	dei	Document Period End Date DocumentPeriodEndDate	2021-12-31
CY2021	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2021	dei	Document Transition Report DocumentTransitionReport	false
CY2021	dei	Entity File Number EntityFileNumber	1-16463
CY2021	dei	Entity Registrant Name EntityRegistrantName	PEABODY ENERGY CORP
CY2021	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2021	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	13-4004153
CY2021	dei	Entity Address Address Line1 EntityAddressAddressLine1	701 Market Street,
CY2021	dei	Entity Address City Or Town EntityAddressCityOrTown	St. Louis,
CY2021	dei	Entity Address State Or Province EntityAddressStateOrProvince	MO
CY2021	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	63101-1826
CY2021	dei	City Area Code CityAreaCode	314
CY2021	dei	Local Phone Number LocalPhoneNumber	342-3400
CY2021	dei	Security12b Title Security12bTitle	Common Stock, par value $0.01 per share
CY2021	dei	Trading Symbol TradingSymbol	BTU
CY2021	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2021	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2021	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2021	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2021	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2021	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2021	dei	Entity Small Business EntitySmallBusiness	false
CY2021	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2021	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2021	dei	Entity Shell Company EntityShellCompany	false
CY2021Q2	dei	Entity Public Float EntityPublicFloat	645500000	USD
CY2021	dei	Entity Bankruptcy Proceedings Reporting Current EntityBankruptcyProceedingsReportingCurrent	true
CY2022Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	133607136	shares
CY2021	dei	Auditor Name AuditorName	Ernst & Young, LLP
CY2021	dei	Auditor Location AuditorLocation	St. Louis, Missouri
CY2021	dei	Auditor Firm AuditorFirmId	42
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CY2021	us-gaap	Restructuring Charges RestructuringCharges	8300000	USD
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CY2021	us-gaap	Investment Income Interest InvestmentIncomeInterest	6500000	USD
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CY2021	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	-38300000	USD
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CY2020	btu	Comprehensive Income Loss Attributable To Common Stockholders ComprehensiveIncomeLossAttributableToCommonStockholders	-1696100000	USD
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CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	244800000	USD
CY2021Q4	us-gaap	Inventory Net InventoryNet	226700000	USD
CY2020Q4	us-gaap	Inventory Net InventoryNet	261600000	USD
CY2021Q4	us-gaap	Other Assets Current OtherAssetsCurrent	270200000	USD
CY2020Q4	us-gaap	Other Assets Current OtherAssetsCurrent	204700000	USD
CY2021Q4	us-gaap	Assets Current AssetsCurrent	1801700000	USD
CY2020Q4	us-gaap	Assets Current AssetsCurrent	1420300000	USD
CY2021Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	2950600000	USD
CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	3051100000	USD
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	35500000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	49900000	USD
CY2021Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	162000000.0	USD
CY2020Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	140900000	USD
CY2021Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	0	USD
CY2020Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	4900000	USD
CY2021Q4	us-gaap	Assets Assets	4949800000	USD
CY2020Q4	us-gaap	Assets Assets	4667100000	USD
CY2021Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	59600000	USD
CY2020Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	44900000	USD
CY2021Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	872100000	USD
CY2020Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	745700000	USD
CY2021Q4	us-gaap	Liabilities Current LiabilitiesCurrent	931700000	USD
CY2020Q4	us-gaap	Liabilities Current LiabilitiesCurrent	790600000	USD
CY2021Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	1078200000	USD
CY2020Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	1502900000	USD
CY2021Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	27300000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	35000000.0	USD
CY2021Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	654800000	USD
CY2020Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	650500000	USD
CY2021Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	212100000	USD
CY2020Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	413200000	USD
CY2021Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	27200000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	42100000	USD
CY2021Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	197700000	USD
CY2020Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	251500000	USD
CY2021Q4	us-gaap	Liabilities Liabilities	3129000000	USD
CY2020Q4	us-gaap	Liabilities Liabilities	3685800000	USD
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	450000000.0	shares
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	450000000.0	shares
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	176300000	shares
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	133300000	shares
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	140500000	shares
CY2020Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	97800000	shares
CY2021Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	3745600000	USD
CY2020Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	3364600000	USD
CY2021Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	43000000.0	shares
CY2020Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	42700000	shares
CY2021Q4	us-gaap	Treasury Stock Value TreasuryStockValue	1370300000	USD
CY2020Q4	us-gaap	Treasury Stock Value TreasuryStockValue	1368900000	USD
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-913200000	USD
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-1273300000	USD
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	297900000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	205800000	USD
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	1761800000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	929600000	USD
CY2021Q4	us-gaap	Minority Interest MinorityInterest	59000000.0	USD
CY2020Q4	us-gaap	Minority Interest MinorityInterest	51700000	USD
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1820800000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	981300000	USD
CY2021Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	4949800000	USD
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	4667100000	USD
CY2021	us-gaap	Profit Loss ProfitLoss	371400000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	-1873800000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	-185100000	USD
CY2021	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	24000000.0	USD
CY2020	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-14000000.0	USD
CY2019	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	3200000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	347400000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-1859800000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-188300000	USD
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	308700000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	346000000.0	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	601000000.0	USD
CY2021	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-21300000	USD
CY2020	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-16200000	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-16000000.0	USD
CY2021	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	-7500000	USD
CY2020	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	27800000	USD
CY2019	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	39400000	USD
CY2021	btu	Sharebased Compensation Total SharebasedCompensationTotal	10000000.0	USD
CY2020	btu	Sharebased Compensation Total SharebasedCompensationTotal	13500000	USD
CY2019	btu	Sharebased Compensation Total SharebasedCompensationTotal	38300000	USD
CY2021	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	0	USD
CY2020	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	1487400000	USD
CY2019	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	270200000	USD
CY2021	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	31500000	USD
CY2020	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	15200000	USD
CY2019	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	2100000	USD
CY2021	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	33200000	USD
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-200000	USD
CY2021	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	82100000	USD
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-60100000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	3400000	USD
CY2021	btu	Provisionforequipmentloss Provisionforequipmentloss	0	USD
CY2020	btu	Provisionforequipmentloss Provisionforequipmentloss	0	USD
CY2019	btu	Provisionforequipmentloss Provisionforequipmentloss	83200000	USD
CY2021	btu	Gainon Veb Asettlement GainonVEBAsettlement	0	USD
CY2020	btu	Gainon Veb Asettlement GainonVEBAsettlement	0	USD
CY2019	btu	Gainon Veb Asettlement GainonVEBAsettlement	48100000	USD
CY2021	btu	Monetization Foreign Currency Hedge Positions MonetizationForeignCurrencyHedgePositions	5800000	USD
CY2020	btu	Monetization Foreign Currency Hedge Positions MonetizationForeignCurrencyHedgePositions	-13000000.0	USD
CY2019	btu	Monetization Foreign Currency Hedge Positions MonetizationForeignCurrencyHedgePositions	5200000	USD
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	105600000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-84600000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-82900000	USD
CY2021	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-35000000.0	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-69900000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	53300000	USD
CY2021	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	57600000	USD
CY2020	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-21000000.0	USD
CY2019	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	35600000	USD
CY2021	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	128100000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-192400000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-118200000	USD
CY2021	btu	Proceeds From Release Of Collateral ProceedsFromReleaseOfCollateral	-6300000	USD
CY2020	btu	Proceeds From Release Of Collateral ProceedsFromReleaseOfCollateral	-15000000.0	USD
CY2019	btu	Proceeds From Release Of Collateral ProceedsFromReleaseOfCollateral	0	USD
CY2021	us-gaap	Increase Decrease In Asset Retirement Obligations IncreaseDecreaseInAssetRetirementObligations	6800000	USD
CY2020	us-gaap	Increase Decrease In Asset Retirement Obligations IncreaseDecreaseInAssetRetirementObligations	22500000	USD
CY2019	us-gaap	Increase Decrease In Asset Retirement Obligations IncreaseDecreaseInAssetRetirementObligations	6600000	USD
CY2021	us-gaap	Increase Decrease In Workers Compensation Liabilities IncreaseDecreaseInWorkersCompensationLiabilities	-2000000.0	USD
CY2020	us-gaap	Increase Decrease In Workers Compensation Liabilities IncreaseDecreaseInWorkersCompensationLiabilities	1800000	USD
CY2019	us-gaap	Increase Decrease In Workers Compensation Liabilities IncreaseDecreaseInWorkersCompensationLiabilities	5000000.0	USD
CY2021	us-gaap	Increase Decrease In Postretirement Obligations IncreaseDecreaseInPostretirementObligations	-108200000	USD
CY2020	us-gaap	Increase Decrease In Postretirement Obligations IncreaseDecreaseInPostretirementObligations	-12100000	USD
CY2019	us-gaap	Increase Decrease In Postretirement Obligations IncreaseDecreaseInPostretirementObligations	36800000	USD
CY2021	us-gaap	Increase Decrease In Pension Plan Obligations IncreaseDecreaseInPensionPlanObligations	11600000	USD
CY2020	us-gaap	Increase Decrease In Pension Plan Obligations IncreaseDecreaseInPensionPlanObligations	-28400000	USD
CY2019	us-gaap	Increase Decrease In Pension Plan Obligations IncreaseDecreaseInPensionPlanObligations	-32500000	USD
CY2021	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	0	USD
CY2020	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	100000	USD
CY2019	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	2100000	USD
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	440700000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	15000000.0	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	705400000	USD
CY2021	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	-20700000	USD
CY2020	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	-24700000	USD
CY2019	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	-28000000.0	USD
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	420000000.0	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-9700000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	677400000	USD
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	183100000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	191400000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	285400000	USD
CY2021	btu	Increase Decease In Accrued Liabilities Related To Capital Expenditures Investing Activities IncreaseDeceaseInAccruedLiabilitiesRelatedToCapitalExpendituresInvestingActivities	7400000	USD
CY2020	btu	Increase Decease In Accrued Liabilities Related To Capital Expenditures Investing Activities IncreaseDeceaseInAccruedLiabilitiesRelatedToCapitalExpendituresInvestingActivities	-6100000	USD
CY2019	btu	Increase Decease In Accrued Liabilities Related To Capital Expenditures Investing Activities IncreaseDeceaseInAccruedLiabilitiesRelatedToCapitalExpendituresInvestingActivities	100000	USD
CY2021	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	0	USD
CY2020	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	0	USD
CY2019	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	23200000	USD
CY2021	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	17800000	USD
CY2020	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	27100000	USD
CY2019	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	30000000.0	USD
CY2021	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	2400000	USD
CY2021	btu	Contributions To Joint Ventures ContributionsToJointVentures	485600000	USD
CY2020	btu	Contributions To Joint Ventures ContributionsToJointVentures	343000000.0	USD
CY2019	btu	Contributions To Joint Ventures ContributionsToJointVentures	419100000	USD
CY2021	btu	Distributions From Joint Ventures DistributionsFromJointVentures	470800000	USD
CY2020	btu	Distributions From Joint Ventures DistributionsFromJointVentures	330300000	USD
CY2019	btu	Distributions From Joint Ventures DistributionsFromJointVentures	408800000	USD
CY2021	us-gaap	Increase Decrease In Due From Related Parties IncreaseDecreaseInDueFromRelatedParties	500000	USD
CY2020	us-gaap	Increase Decrease In Due From Related Parties IncreaseDecreaseInDueFromRelatedParties	23200000	USD
CY2019	us-gaap	Increase Decrease In Due From Related Parties IncreaseDecreaseInDueFromRelatedParties	27300000	USD
CY2021	us-gaap	Increase Decrease In Due To Related Parties IncreaseDecreaseInDueToRelatedParties	44700000	USD
CY2020	us-gaap	Increase Decrease In Due To Related Parties IncreaseDecreaseInDueToRelatedParties	0	USD
CY2019	us-gaap	Increase Decrease In Due To Related Parties IncreaseDecreaseInDueToRelatedParties	14700000	USD
CY2021	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	0	USD
CY2020	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	0	USD
CY2019	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	3000000.0	USD
CY2021	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	3000000.0	USD
CY2020	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	400000	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	900000	USD
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-131500000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-206700000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-261300000	USD
CY2021	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2020	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	375000000.0	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2021	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	285300000	USD
CY2020	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	169500000	USD
CY2019	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	71100000	USD
CY2021	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	22500000	USD
CY2020	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	7000000.0	USD
CY2019	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	6400000	USD
CY2021	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	269800000	USD
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	329900000	USD
CY2021	btu	Payments For Repurchase Of Common Stock Relinquished For Tax Withholding PaymentsForRepurchaseOfCommonStockRelinquishedForTaxWithholding	1400000	USD
CY2020	btu	Payments For Repurchase Of Common Stock Relinquished For Tax Withholding PaymentsForRepurchaseOfCommonStockRelinquishedForTaxWithholding	1600000	USD
CY2019	btu	Payments For Repurchase Of Common Stock Relinquished For Tax Withholding PaymentsForRepurchaseOfCommonStockRelinquishedForTaxWithholding	12300000	USD
CY2021	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	0	USD
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	0	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	258100000	USD
CY2021	btu	Minority Interest Increase From Contributions To Noncontrolling Interest Holders MinorityInterestIncreaseFromContributionsToNoncontrollingInterestHolders	4000000.0	USD
CY2020	btu	Minority Interest Increase From Contributions To Noncontrolling Interest Holders MinorityInterestIncreaseFromContributionsToNoncontrollingInterestHolders	3500000	USD
CY2019	btu	Minority Interest Increase From Contributions To Noncontrolling Interest Holders MinorityInterestIncreaseFromContributionsToNoncontrollingInterestHolders	23500000	USD
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-43400000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	193400000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-701300000	USD
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	245100000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-23000000.0	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-285200000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	709200000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	732200000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1017400000	USD
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	954300000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	709200000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	732200000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3451600000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	-185100000	USD
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.410
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	258100000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-0.0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	8700000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	200000	USD
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	38300000	USD
CY2019	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	329900000	USD
CY2019	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	12300000	USD
CY2019	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	23500000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2672500000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	-1873800000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-0.0	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-168100000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	6100000	USD
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	13500000	USD
CY2020	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	1600000	USD
CY2020	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	3500000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	981300000	USD
CY2021	us-gaap	Profit Loss ProfitLoss	371400000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-0.0	USD
CY2021	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-93100000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-1000000.0	USD
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	10000000.0	USD
CY2021	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	101900000	USD
CY2021	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	1400000	USD
CY2021	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	4000000.0	USD
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1820800000	USD
CY2021	btu	Accounts Receivable Payment Term AccountsReceivablePaymentTerm	P30D
CY2021	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	0	USD
CY2019	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	0	USD
CY2020	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	0	USD
CY2021	us-gaap	Royalty Expense RoyaltyExpense	263000000	USD
CY2020	us-gaap	Royalty Expense RoyaltyExpense	214700000	USD
CY2019	us-gaap	Royalty Expense RoyaltyExpense	388600000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Term Of Contract LesseeOperatingLeaseTermOfContract	P10Y
CY2021	btu	Minimum Annual Production Of Federal Coal Mining Leases On Original Amount MinimumAnnualProductionOfFederalCoalMiningLeasesOnOriginalAmount	0.010
CY2021	btu	Monthlyfederalroyaltiespayablefromsaleusingsurfaceminingmethods Monthlyfederalroyaltiespayablefromsaleusingsurfaceminingmethods	0.125
CY2021	btu	Monthlyfederalroyaltiespayableofproductionusingundergroundminingmethods Monthlyfederalroyaltiespayableofproductionusingundergroundminingmethods	0.080
CY2020	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	0	USD
CY2021	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	0	USD
CY2019	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	0	USD
CY2019	us-gaap	Impairment Of Investments ImpairmentOfInvestments	9000000	USD
CY2021	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	USD
CY2020	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	USD
CY2021	us-gaap	Restructuring Charges RestructuringCharges	8300000	USD
CY2020	us-gaap	Restructuring Charges RestructuringCharges	37900000	USD
CY2019	us-gaap	Restructuring Charges RestructuringCharges	24300000	USD
CY2021Q4	us-gaap	Restructuring Reserve Current RestructuringReserveCurrent	900000	USD
CY2019	us-gaap	Tangible Asset Impairment Charges TangibleAssetImpairmentCharges	261200000	USD
CY2021	us-gaap	Tangible Asset Impairment Charges TangibleAssetImpairmentCharges	0	USD
CY2020	us-gaap	Tangible Asset Impairment Charges TangibleAssetImpairmentCharges	1487400000	USD
CY2021	btu	Foreign Currency Remeasurement Gains Losses ForeignCurrencyRemeasurementGainsLosses	-3100000	USD
CY2020	btu	Foreign Currency Remeasurement Gains Losses ForeignCurrencyRemeasurementGainsLosses	-4000000	USD
CY2019	btu	Foreign Currency Remeasurement Gains Losses ForeignCurrencyRemeasurementGainsLosses	-2700000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	6100000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	200000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-1000000	USD
CY2021Q4	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P12M
CY2021	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-bottom:9pt;margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9.5pt;font-style:italic;font-weight:700;line-height:120%">Use of Estimates in the Preparation of the Consolidated Financial Statements</span></div><div style="margin-bottom:9pt;margin-top:9pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9.5pt;font-weight:400;line-height:120%">These consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the U.S. (U.S. GAAP). In doing so, estimates and assumptions are made that affect the amounts reported in the consolidated financial statements and accompanying notes. These estimates are based on historical experience and on various other assumptions deemed reasonable under the circumstances, the results of which form the basis for making judgments about the carrying amounts of assets and liabilities that are not readily apparent from other sources. The Company’s actual results may differ materially from these estimates. Significant estimates inherent in the preparation of these consolidated financial statements include, but are not limited to, accounting for sales and cost recognition, postretirement benefit plans, environmental receivables and liabilities, asset retirement obligations, evaluation of long-lived assets for impairment, income taxes including deferred tax assets, fair value measurements and contingencies.</span></div>
CY2021	us-gaap	Revenues Revenues	3318300000	USD
CY2020	us-gaap	Revenues Revenues	2881100000	USD
CY2019	us-gaap	Revenues Revenues	4623400000	USD
CY2021Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	5300000000	USD
CY2021Q4	us-gaap	Revenue Remaining Performance Obligation Percentage RevenueRemainingPerformanceObligationPercentage	0.46
CY2021Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	307000000.0	USD
CY2020Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	180900000	USD
CY2021Q4	us-gaap	Other Receivables Net Current OtherReceivablesNetCurrent	43500000	USD
CY2020Q4	us-gaap	Other Receivables Net Current OtherReceivablesNetCurrent	63900000	USD
CY2021Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	350500000	USD
CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	244800000	USD
CY2021	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	0	USD
CY2019	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	-4400000	USD
CY2021	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2021	btu	Impairment Of Unallocated Coal Reserves ImpairmentOfUnallocatedCoalReserves	69300000	USD
CY2020	btu	Impairment Of Unallocated Coal Reserves ImpairmentOfUnallocatedCoalReserves	69200000	USD
CY2019	us-gaap	Impairment Of Investments ImpairmentOfInvestments	9000000	USD
CY2021Q4	btu	Assets Subject To Recoverability Review AssetsSubjectToRecoverabilityReview	500000000	USD
CY2021	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	24000000.0	USD
CY2020	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-14000000.0	USD
CY2019	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	3200000	USD
CY2021	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	0	USD
CY2020	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	0	USD
CY2019	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	0	USD
CY2021Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation Current LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent	45000000.0	USD
CY2020Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation Current LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent	62300000	USD
CY2021Q4	us-gaap	Disposal Group Including Discontinued Operation Other Noncurrent Liabilities DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentLiabilities	59000000.0	USD
CY2020Q4	us-gaap	Disposal Group Including Discontinued Operation Other Noncurrent Liabilities DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentLiabilities	91400000	USD
CY2021Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation	104000000.0	USD
CY2020Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation	153700000	USD
CY2015Q4	btu	Number Of Buyers NumberOfBuyers	2	buyer
CY2021Q4	us-gaap	Inventory Raw Materials And Supplies Net Of Reserves InventoryRawMaterialsAndSuppliesNetOfReserves	102100000	USD
CY2020Q4	us-gaap	Inventory Raw Materials And Supplies Net Of Reserves InventoryRawMaterialsAndSuppliesNetOfReserves	102600000	USD
CY2021Q4	btu	Raw Coal RawCoal	54600000	USD
CY2020Q4	btu	Raw Coal RawCoal	70500000	USD
CY2021Q4	btu	Saleable Coal SaleableCoal	70000000.0	USD
CY2020Q4	btu	Saleable Coal SaleableCoal	88500000	USD
CY2021Q4	us-gaap	Inventory Net InventoryNet	226700000	USD
CY2020Q4	us-gaap	Inventory Net InventoryNet	261600000	USD
CY2021Q4	us-gaap	Equity Method Investments EquityMethodInvestments	62200000	USD
CY2020Q4	us-gaap	Equity Method Investments EquityMethodInvestments	24600000	USD
CY2021	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	82100000	USD
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-60100000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	3400000	USD
CY2021Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	130100000	USD
CY2020Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	9500000	USD
CY2020Q4	us-gaap	Margin Deposit Assets MarginDepositAssets	6500000	USD
CY2021Q4	us-gaap	Margin Deposit Assets MarginDepositAssets	91800000	USD
CY2021	us-gaap	Fair Value Measurements Sensitivity Analysis Description FairValueMeasurementsSensitivityAnalysisDescription	10
CY2021Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	1480500000	USD
CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	1321300000	USD
CY2021Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	2950600000	USD
CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	3051100000	USD
CY2021Q4	btu	Coal Reserves CoalReserves	1400000000	USD
CY2020Q4	btu	Coal Reserves CoalReserves	1500000000	USD
CY2021Q4	btu	Coal Reserves Not Subject To Depletion CoalReservesNotSubjectToDepletion	100000000	USD
CY2020Q4	btu	Coal Reserves Not Subject To Depletion CoalReservesNotSubjectToDepletion	100000000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-55000000.0	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-1771500000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-374200000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	425200000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-80300000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	231900000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	370200000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-1851800000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-142300000	USD
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-500000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-23900000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-21500000	USD
CY2021	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	30800000	USD
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	2400000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	28400000	USD
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	0	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1700000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-300000	USD
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	30300000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-19800000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	6600000	USD
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	0	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	23400000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	20300000	USD
CY2021	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-7500000	USD
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	4400000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	19300000	USD
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-200000	USD
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-7500000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	27800000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	39400000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	22800000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8000000.0	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	46000000.0	USD
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	77700000	USD
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-388900000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-29900000	USD
CY2021	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-101300000	USD
CY2020	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	410100000	USD
CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-32000000.0	USD
CY2021	btu	Changesintaxreserves Changesintaxreserves	1900000	USD
CY2020	btu	Changesintaxreserves Changesintaxreserves	-7700000	USD
CY2019	btu	Changesintaxreserves Changesintaxreserves	3000000.0	USD
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-13700000	USD
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-14500000	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-19300000	USD
CY2021	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	0	USD
CY2020	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	0	USD
CY2019	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	76100000	USD
CY2021	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	17300000	USD
CY2020	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	16400000	USD
CY2019	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	45600000	USD
CY2021	btu	Effective Income Tax Rate Reconciliation Global Intangible Low Taxed Income EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncome	67000000.0	USD
CY2020	btu	Effective Income Tax Rate Reconciliation Global Intangible Low Taxed Income EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncome	0	USD
CY2019	btu	Effective Income Tax Rate Reconciliation Global Intangible Low Taxed Income EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncome	6100000	USD
CY2021	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	26500000	USD
CY2020	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	0	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	0	USD
CY2021	btu	Remeasurement Of Foreign Taxes RemeasurementOfForeignTaxes	-1800000	USD
CY2020	btu	Remeasurement Of Foreign Taxes RemeasurementOfForeignTaxes	2900000	USD
CY2019	btu	Remeasurement Of Foreign Taxes RemeasurementOfForeignTaxes	-100000	USD
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-1100000	USD
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-6800000	USD
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-13200000	USD
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	3300000	USD
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-3500000	USD
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	9700000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	22800000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8000000.0	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	46000000.0	USD
CY2021	btu	Effective Income Tax Rate Reconciliation Global Intangible Low Taxed Income EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncome	67000000	USD
CY2019	btu	Effective Income Tax Rate Reconciliation Global Intangible Low Taxed Income EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncome	6100000	USD
CY2020	btu	Effective Income Tax Rate Reconciliation Global Intangible Low Taxed Income EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncome	0	USD
CY2021	btu	Alternative Minimum Tax Credit Refunds Received AlternativeMinimumTaxCreditRefundsReceived	1200000	USD
CY2020	btu	Alternative Minimum Tax Credit Refunds Received AlternativeMinimumTaxCreditRefundsReceived	46900000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	1267600000	USD
CY2020Q4	btu	Deferred Tax Assets Investmentsand Other Assets DeferredTaxAssetsInvestmentsandOtherAssets	88000000.0	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	1377400000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	571900000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	573700000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	48900000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	93800000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Asset Retirement Obligations DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAssetRetirementObligations	91400000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Asset Retirement Obligations DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAssetRetirementObligations	95500000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	19900000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	22800000	USD
CY2021Q4	btu	Deferred Tax Asset Paymentstothe Veb Atosettletheaccumulatedpostretirementhealthcarebenefitobligations DeferredTaxAssetPaymentstotheVEBAtosettletheaccumulatedpostretirementhealthcarebenefitobligations	9500000	USD
CY2020Q4	btu	Deferred Tax Asset Paymentstothe Veb Atosettletheaccumulatedpostretirementhealthcarebenefitobligations DeferredTaxAssetPaymentstotheVEBAtosettletheaccumulatedpostretirementhealthcarebenefitobligations	11000000.0	USD
CY2021Q4	us-gaap	Deferred Tax Assets Hedging Transactions DeferredTaxAssetsHedgingTransactions	36800000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Hedging Transactions DeferredTaxAssetsHedgingTransactions	2400000	USD
CY2021Q4	us-gaap	Deferred Tax Asset Interest Carryforward DeferredTaxAssetInterestCarryforward	7900000	USD
CY2020Q4	us-gaap	Deferred Tax Asset Interest Carryforward DeferredTaxAssetInterestCarryforward	0	USD
CY2021Q4	btu	Deferred Tax Assets Investmentsand Other Assets DeferredTaxAssetsInvestmentsandOtherAssets	81800000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	7200000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	7800000	USD
CY2021Q4	btu	Deferred Tax Assets Operating Lease Liabilities DeferredTaxAssetsOperatingLeaseLiabilities	11300000	USD
CY2020Q4	btu	Deferred Tax Assets Operating Lease Liabilities DeferredTaxAssetsOperatingLeaseLiabilities	17500000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	22700000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	21700000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	2176900000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	2311600000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	2120800000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	2287300000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	56100000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	24300000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	66400000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	36200000	USD
CY2021Q4	btu	Deferred Tax Liabilities Operating Lease Right Of Use Assets DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets	9400000	USD
CY2020Q4	btu	Deferred Tax Liabilities Operating Lease Right Of Use Assets DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets	13500000	USD
CY2021Q4	btu	Deferred Tax Liabilities Investments And Other Assets DeferredTaxLiabilitiesInvestmentsAndOtherAssets	7600000	USD
CY2020Q4	btu	Deferred Tax Liabilities Investments And Other Assets DeferredTaxLiabilitiesInvestmentsAndOtherAssets	4700000	USD
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	83400000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	54400000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	27300000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	30100000	USD
CY2021Q4	us-gaap	Deferred Income Taxes And Other Assets Noncurrent DeferredIncomeTaxesAndOtherAssetsNoncurrent	0	USD
CY2020Q4	us-gaap	Deferred Income Taxes And Other Assets Noncurrent DeferredIncomeTaxesAndOtherAssetsNoncurrent	4900000	USD
CY2021Q4	us-gaap	Deferred Income Taxes And Other Tax Liabilities Noncurrent DeferredIncomeTaxesAndOtherTaxLiabilitiesNoncurrent	27300000	USD
CY2020Q4	us-gaap	Deferred Income Taxes And Other Tax Liabilities Noncurrent DeferredIncomeTaxesAndOtherTaxLiabilitiesNoncurrent	35000000.0	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	27300000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	30100000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	1600000000	AUD
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	2600000000	USD
CY2021Q4	us-gaap	Tax Credit Carryforward Amount TaxCreditCarryforwardAmount	1300000000	USD
CY2021Q4	btu	Deferred Tax Assets Operating Loss Carryforwards Foreign Net DeferredTaxAssetsOperatingLossCarryforwardsForeignNet	491600000	USD
CY2021Q4	btu	Deferred Tax Assets Operating Loss Carryforwards Domestic Net DeferredTaxAssetsOperatingLossCarryforwardsDomesticNet	534200000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	85200000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards General Business DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness	139100000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	15800000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	2100000000	USD
CY2021Q4	btu	Unrecognized Tax Benefit Recordedin Deferred Income Taxes UnrecognizedTaxBenefitRecordedinDeferredIncomeTaxes	-9700000	USD
CY2020Q4	btu	Unrecognized Tax Benefit Recordedin Deferred Income Taxes UnrecognizedTaxBenefitRecordedinDeferredIncomeTaxes	-7800000	USD
CY2021Q4	btu	Unrecognized Tax Benefit Recordedin Other Noncurrent Liabilities UnrecognizedTaxBenefitRecordedinOtherNoncurrentLiabilities	1300000	USD
CY2020Q4	btu	Unrecognized Tax Benefit Recordedin Other Noncurrent Liabilities UnrecognizedTaxBenefitRecordedinOtherNoncurrentLiabilities	1300000	USD
CY2021Q4	btu	Net Unrecognized Tax Benefit NetUnrecognizedTaxBenefit	11000000.0	USD
CY2020Q4	btu	Net Unrecognized Tax Benefit NetUnrecognizedTaxBenefit	9100000	USD
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	11000000.0	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	9100000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	1900000	USD
CY2021Q4	btu	Net Unrecognized Tax Benefit NetUnrecognizedTaxBenefit	11000000	USD
CY2020Q4	btu	Net Unrecognized Tax Benefit NetUnrecognizedTaxBenefit	9100000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	9100000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	16500000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	14000000.0	USD
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	3000000.0	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1900000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	2200000	USD
CY2021	btu	Unrecognized Tax Benefits Increase Decrease Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreaseDecreaseResultingFromPriorPeriodTaxPositions	-1100000	USD
CY2020	btu	Unrecognized Tax Benefits Increase Decrease Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreaseDecreaseResultingFromPriorPeriodTaxPositions	-9300000	USD
CY2019	btu	Unrecognized Tax Benefits Increase Decrease Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreaseDecreaseResultingFromPriorPeriodTaxPositions	300000	USD
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	11000000.0	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	9100000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	16500000	USD
CY2021	btu	Unrecognized Tax Benefits Interest Tax Penalties And Interest Expense Reversal UnrecognizedTaxBenefitsInterestTaxPenaltiesAndInterestExpenseReversal	200000	USD
CY2019	btu	Unrecognized Tax Benefits Interest Tax Penalties And Interest Expense Reversal UnrecognizedTaxBenefitsInterestTaxPenaltiesAndInterestExpenseReversal	400000	USD
CY2020	btu	Unrecognized Tax Benefits Interest Tax Penalties And Interest Expense Reversal UnrecognizedTaxBenefitsInterestTaxPenaltiesAndInterestExpenseReversal	-400000	USD
CY2021Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	5700000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	5400000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	5800000	USD
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	11600000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-39900000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-9100000	USD
CY2021Q4	us-gaap	Accounts Payable Trade Current AccountsPayableTradeCurrent	201700000	USD
CY2020Q4	us-gaap	Accounts Payable Trade Current AccountsPayableTradeCurrent	146300000	USD
CY2021Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	170500000	USD
CY2020Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	163900000	USD
CY2021Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	161300000	USD
CY2020Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	120600000	USD
CY2021Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	78800000	USD
CY2020Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	80400000	USD
CY2021Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	65000000.0	USD
CY2020Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	77700000	USD
CY2021Q4	us-gaap	Accrued Royalties Current AccruedRoyaltiesCurrent	51400000	USD
CY2020Q4	us-gaap	Accrued Royalties Current AccruedRoyaltiesCurrent	25800000	USD
CY2021Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation Current LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent	45000000.0	USD
CY2020Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation Current LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent	62300000	USD
CY2021Q4	btu	Liabilities From Coal Trading Activities Net LiabilitiesFromCoalTradingActivitiesNet	29500000	USD
CY2020Q4	btu	Liabilities From Coal Trading Activities Net LiabilitiesFromCoalTradingActivitiesNet	1700000	USD
CY2021Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	20200000	USD
CY2020Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	2300000	USD
CY2021Q4	btu	Accrued Health Care AccruedHealthCare	17800000	USD
CY2020Q4	btu	Accrued Health Care AccruedHealthCare	15700000	USD
CY2021Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	16400000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	24500000	USD
CY2021Q4	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	8500000	USD
CY2020Q4	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	9000000.0	USD
CY2021Q4	us-gaap	Interest Payable Current InterestPayableCurrent	6000000.0	USD
CY2020Q4	us-gaap	Interest Payable Current InterestPayableCurrent	15500000	USD
CY2021Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	872100000	USD
CY2020Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	745700000	USD
CY2021Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	29300000	USD
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	27300000	USD
CY2021Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	34800000	USD
CY2020Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	42700000	USD
CY2021Q4	us-gaap	Long Term Debt And Capital Lease Obligations Including Current Maturities LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities	1137800000	USD
CY2020Q4	us-gaap	Long Term Debt And Capital Lease Obligations Including Current Maturities LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities	1547800000	USD
CY2021Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	59600000	USD
CY2020Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	44900000	USD
CY2021Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	1078200000	USD
CY2020Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	1502900000	USD
CY2021Q1	btu	Payment For Debt Exchange PaymentForDebtExchange	9400000	USD
CY2021Q1	btu	Payment For Debt Exchange Early Tender Premiums PaymentForDebtExchangeEarlyTenderPremiums	4000000	USD
CY2021	us-gaap	Professional Fees ProfessionalFees	10600000	USD
CY2021Q4	btu	Lease Obligation Assumed Amount Recoverablefrom Third Parties LeaseObligationAssumedAmountRecoverablefromThirdParties	0	USD
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	19800000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	28800000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	43300000	USD
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	15500000	USD
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	39100000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	49700000	USD
CY2021	us-gaap	Variable Lease Cost VariableLeaseCost	2700000	USD
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	4600000	USD
CY2019	us-gaap	Variable Lease Cost VariableLeaseCost	19100000	USD
CY2021	btu	Sublease Expense Income SubleaseExpenseIncome	-1900000	USD
CY2020	btu	Sublease Expense Income SubleaseExpenseIncome	-2300000	USD
CY2019	btu	Sublease Expense Income SubleaseExpenseIncome	-2600000	USD
CY2021	us-gaap	Lease Cost LeaseCost	36100000	USD
CY2020	us-gaap	Lease Cost LeaseCost	70200000	USD
CY2019	us-gaap	Lease Cost LeaseCost	109500000	USD
CY2021	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	5900000	USD
CY2020	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	3500000	USD
CY2019	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	15300000	USD
CY2021	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	2700000	USD
CY2020	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	800000	USD
CY2019	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	1500000	USD
CY2021	btu	Finance Lease Cost FinanceLeaseCost	8600000	USD
CY2020	btu	Finance Lease Cost FinanceLeaseCost	4300000	USD
CY2019	btu	Finance Lease Cost FinanceLeaseCost	16800000	USD
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	35500000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	49900000	USD
CY2021Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	16400000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	24500000	USD
CY2021Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	27200000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	42100000	USD
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	43600000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	66600000	USD
CY2021Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	32200000	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	20400000	USD
CY2021Q4	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	7400000	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	2500000	USD
CY2021Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	24800000	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	17900000	USD
CY2021Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	29300000	USD
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	27300000	USD
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P3Y
CY2021Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P6Y8M12D
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.069
CY2021Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.085
CY2021	btu	Operatingcashflowsforoperatingleases Operatingcashflowsforoperatingleases	24300000	USD
CY2020	btu	Operatingcashflowsforoperatingleases Operatingcashflowsforoperatingleases	35100000	USD
CY2019	btu	Operatingcashflowsforoperatingleases Operatingcashflowsforoperatingleases	51000000.0	USD
CY2021	btu	Operatingcashflowsforfinanceleases Operatingcashflowsforfinanceleases	3800000	USD
CY2020	btu	Operatingcashflowsforfinanceleases Operatingcashflowsforfinanceleases	800000	USD
CY2019	btu	Operatingcashflowsforfinanceleases Operatingcashflowsforfinanceleases	1500000	USD
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	8200000	USD
CY2020	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	8900000	USD
CY2019	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	29600000	USD
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	7100000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	16500000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	16600000	USD
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	24400000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	1600000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	1600000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	18900000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	11400000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	16900000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	5900000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	6000000.0	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	4900000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	3400000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	4800000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	3500000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	2400000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	300000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	7200000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	49000000.0	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	36600000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	5400000	USD
CY2021Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	7300000	USD
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	43600000	USD
CY2021Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	29300000	USD
CY2020Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	728200000	USD
CY2019Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	752300000	USD
CY2021	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	72400000	USD
CY2020	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	38400000	USD
CY2021	us-gaap	Accretion Expense AccretionExpense	54900000	USD
CY2020	us-gaap	Accretion Expense AccretionExpense	56000000.0	USD
CY2021	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	9100000	USD
CY2020	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-41700000	USD
CY2021Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	719800000	USD
CY2020Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	728200000	USD
CY2021Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	65000000.0	USD
CY2020Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	77700000	USD
CY2021Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	654800000	USD
CY2020Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	650500000	USD
CY2021Q4	btu	Asset Retirement Obligation Active Locations AssetRetirementObligationActiveLocations	511800000	USD
CY2020Q4	btu	Asset Retirement Obligation Active Locations AssetRetirementObligationActiveLocations	471800000	USD
CY2021Q4	btu	Asset Retirement Obligation Closed Or Inactive Locations AssetRetirementObligationClosedOrInactiveLocations	208000000.0	USD
CY2020Q4	btu	Asset Retirement Obligation Closed Or Inactive Locations AssetRetirementObligationClosedOrInactiveLocations	256400000	USD
CY2021Q4	btu	Surety Bonds Outstanding For Reclamation SuretyBondsOutstandingForReclamation	1294700000	USD
CY2020Q4	btu	Surety Bonds Outstanding For Reclamation SuretyBondsOutstandingForReclamation	1451900000	USD
CY2021Q4	btu	Lettersofcreditinsupportofreclamationobligationsoractivities Lettersofcreditinsupportofreclamationobligationsoractivities	323000000	USD
CY2020Q4	btu	Lettersofcreditinsupportofreclamationobligationsoractivities Lettersofcreditinsupportofreclamationobligationsoractivities	315000000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	139500000	USD
CY2021	btu	Defined Benefit Plan Average Remaining Service Period DefinedBenefitPlanAverageRemainingServicePeriod	P2Y10M24D
CY2020	btu	Defined Benefit Plan Average Remaining Service Period DefinedBenefitPlanAverageRemainingServicePeriod	P3Y10M24D
CY2021Q4	btu	Number Of Veba Trusts NumberOfVEBATrusts	2	numberOfTrust
CY2021Q4	us-gaap	Defined Benefit Plan Assets For Plan Benefits Noncurrent DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent	28500000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Assets For Plan Benefits Noncurrent DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent	39600000	USD
CY2017Q2	btu	Number Of Defined Contribution Plans NumberOfDefinedContributionPlans	3	numberOfPlan
CY2021	btu	Paid Discretionary Contributions To Defined Contribution Pension Plans Company Match PaidDiscretionaryContributionsToDefinedContributionPensionPlansCompanyMatch	9700000	USD
CY2020	btu	Paid Discretionary Contributions To Defined Contribution Pension Plans Company Match PaidDiscretionaryContributionsToDefinedContributionPensionPlansCompanyMatch	9600000	USD
CY2019	btu	Paid Discretionary Contributions To Defined Contribution Pension Plans Company Match PaidDiscretionaryContributionsToDefinedContributionPensionPlansCompanyMatch	27800000	USD
CY2019	btu	Discretionarycontributionstodefinedcontributionpensionplansgranted Discretionarycontributionstodefinedcontributionpensionplansgranted	0	USD
CY2019	btu	Discretionarycontributionstodefinedcontributionpensionplansgranted Discretionarycontributionstodefinedcontributionpensionplansgranted	0	USD
CY2019	btu	Discretionarycontributionstodefinedcontributionpensionplansgranted Discretionarycontributionstodefinedcontributionpensionplansgranted	0	USD
CY2021	btu	Paymentofpriorperformancecontributions Paymentofpriorperformancecontributions	0	USD
CY2020	btu	Paymentofpriorperformancecontributions Paymentofpriorperformancecontributions	0	USD
CY2019	btu	Paymentofpriorperformancecontributions Paymentofpriorperformancecontributions	8900000	USD
CY2021Q4	btu	Common Stock Voting Rights Per Share CommonStockVotingRightsPerShare	1	numberOfVote
CY2020Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	97800000	shares
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	96900000	shares
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CY2021	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	59000000	USD
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CY2020	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-3500000	USD
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	26200000	USD
CY2021	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	336100000	USD
CY2020	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	-1856300000	USD
CY2019	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	-214500000	USD
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CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-211300000	USD
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CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	97700000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	103700000	shares
CY2021	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	900000	shares
CY2020	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2019	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2021	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	112000000.0	shares
CY2020	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	97700000	shares
CY2019	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	103700000	shares
CY2021	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	3.03
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CY2021	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Basic Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare	0.21
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CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.24
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CY2021	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	3.00
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CY2021Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	719800000	USD
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CY2021Q4	btu	Lettersof Credit Outstandingfor Reclamation LettersofCreditOutstandingforReclamation	323000000	USD
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CY2021	us-gaap	Revenues Revenues	3318300000	USD
CY2021	btu	Segment Reporting Information Adjusted Earning Before Interest Taxes Depreciation And Amortization SegmentReportingInformationAdjustedEarningBeforeInterestTaxesDepreciationAndAmortization	916700000	USD
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CY2019Q4	us-gaap	Assets Assets	6542800000	USD
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CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	191400000	USD
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-60100000	USD
CY2019	us-gaap	Revenues Revenues	4623400000	USD
CY2019	btu	Segment Reporting Information Adjusted Earning Before Interest Taxes Depreciation And Amortization SegmentReportingInformationAdjustedEarningBeforeInterestTaxesDepreciationAndAmortization	883000000.0	USD
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CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	3400000	USD
CY2021Q4	us-gaap	Assets Assets	4949800000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2950600000	USD
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CY2020Q4	us-gaap	Assets Assets	4667100000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3051100000	USD
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CY2019	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-188300000	USD
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	308700000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	346000000.0	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	601000000.0	USD
CY2021	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	44700000	USD
CY2020	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	45700000	USD
CY2019	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	58400000	USD
CY2021	us-gaap	Restructuring Charges RestructuringCharges	8300000	USD
CY2020	us-gaap	Restructuring Charges RestructuringCharges	37900000	USD
CY2019	us-gaap	Restructuring Charges RestructuringCharges	24300000	USD
CY2021	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	0	USD
CY2020	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	23100000	USD
CY2019	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	21600000	USD
CY2021	btu	Gainonformationof United Wambo Jv GainonformationofUnitedWamboJV	0	USD
CY2020	btu	Gainonformationof United Wambo Jv GainonformationofUnitedWamboJV	0	USD
CY2019	btu	Gainonformationof United Wambo Jv GainonformationofUnitedWamboJV	48100000	USD
CY2021	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	1487400000	USD
CY2019	us-gaap	Asset Impairment Charges AssetImpairmentCharges	270200000	USD
CY2021	btu	Provisionforequipmentloss Provisionforequipmentloss	0	USD
CY2020	btu	Provisionforequipmentloss Provisionforequipmentloss	0	USD
CY2019	btu	Provisionforequipmentloss Provisionforequipmentloss	83200000	USD
CY2021	us-gaap	Gain On Business Interruption Insurance Recovery GainOnBusinessInterruptionInsuranceRecovery	0	USD
CY2020	us-gaap	Gain On Business Interruption Insurance Recovery GainOnBusinessInterruptionInsuranceRecovery	0	USD
CY2019	us-gaap	Gain On Business Interruption Insurance Recovery GainOnBusinessInterruptionInsuranceRecovery	91100000	USD
CY2021	btu	Increase Decreasein Deferred Tax Asset Valuation Allowanceand Amortizationof Basis Difference Relatedto Equity Affiliates IncreaseDecreaseinDeferredTaxAssetValuationAllowanceandAmortizationofBasisDifferenceRelatedtoEquityAffiliates	33800000	USD
CY2020	btu	Increase Decreasein Deferred Tax Asset Valuation Allowanceand Amortizationof Basis Difference Relatedto Equity Affiliates IncreaseDecreaseinDeferredTaxAssetValuationAllowanceandAmortizationofBasisDifferenceRelatedtoEquityAffiliates	-30900000	USD
CY2019	btu	Increase Decreasein Deferred Tax Asset Valuation Allowanceand Amortizationof Basis Difference Relatedto Equity Affiliates IncreaseDecreaseinDeferredTaxAssetValuationAllowanceandAmortizationofBasisDifferenceRelatedtoEquityAffiliates	18800000	USD
CY2021	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	183400000	USD
CY2020	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	139800000	USD
CY2019	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	144000000.0	USD
CY2021	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	33200000	USD
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-200000	USD
CY2021	us-gaap	Investment Income Interest InvestmentIncomeInterest	6500000	USD
CY2020	us-gaap	Investment Income Interest InvestmentIncomeInterest	9400000	USD
CY2019	us-gaap	Investment Income Interest InvestmentIncomeInterest	27000000.0	USD
CY2021	btu	Markto Market Adjustmenton Pensionand Postretirement Plans Net MarktoMarketAdjustmentonPensionandPostretirementPlansNet	-43400000	USD
CY2020	btu	Markto Market Adjustmenton Pensionand Postretirement Plans Net MarktoMarketAdjustmentonPensionandPostretirementPlansNet	-5100000	USD
CY2019	btu	Markto Market Adjustmenton Pensionand Postretirement Plans Net MarktoMarketAdjustmentonPensionandPostretirementPlansNet	67400000	USD
CY2021	btu	Derivative Instruments Not Designatedas Hedging Instruments Unrealized Gain Loss Net DerivativeInstrumentsNotDesignatedasHedgingInstrumentsUnrealizedGainLossNet	-115100000	USD
CY2020	btu	Derivative Instruments Not Designatedas Hedging Instruments Unrealized Gain Loss Net DerivativeInstrumentsNotDesignatedasHedgingInstrumentsUnrealizedGainLossNet	-29600000	USD
CY2019	btu	Derivative Instruments Not Designatedas Hedging Instruments Unrealized Gain Loss Net DerivativeInstrumentsNotDesignatedasHedgingInstrumentsUnrealizedGainLossNet	42200000	USD
CY2021	us-gaap	Gain Loss On Sale Of Commodity Contracts GainLossOnSaleOfCommodityContracts	-7500000	USD
CY2020	us-gaap	Gain Loss On Sale Of Commodity Contracts GainLossOnSaleOfCommodityContracts	7100000	USD
CY2019	us-gaap	Gain Loss On Sale Of Commodity Contracts GainLossOnSaleOfCommodityContracts	1200000	USD
CY2021	btu	Fresh Start Adjustment Fair Value Adjustment FreshStartAdjustmentFairValueAdjustment	4300000	USD
CY2020	btu	Fresh Start Adjustment Fair Value Adjustment FreshStartAdjustmentFairValueAdjustment	8200000	USD
CY2019	btu	Fresh Start Adjustment Fair Value Adjustment FreshStartAdjustmentFairValueAdjustment	16600000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	22800000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8000000.0	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	46000000.0	USD
CY2021	btu	Segment Reporting Information Adjusted Earning Before Interest Taxes Depreciation And Amortization SegmentReportingInformationAdjustedEarningBeforeInterestTaxesDepreciationAndAmortization	916700000	USD
CY2020	btu	Segment Reporting Information Adjusted Earning Before Interest Taxes Depreciation And Amortization SegmentReportingInformationAdjustedEarningBeforeInterestTaxesDepreciationAndAmortization	258800000	USD
CY2019	btu	Segment Reporting Information Adjusted Earning Before Interest Taxes Depreciation And Amortization SegmentReportingInformationAdjustedEarningBeforeInterestTaxesDepreciationAndAmortization	883000000.0	USD
CY2021	btu	Segment Reporting Revenue Percentage SegmentReportingRevenuePercentage	1.000
CY2020	btu	Segment Reporting Revenue Percentage SegmentReportingRevenuePercentage	1.000
CY2019	btu	Segment Reporting Revenue Percentage SegmentReportingRevenuePercentage	1.000

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PEABODY ENERGY CORP Stock $btu

2021 Q4 Form 10-K Financial Statement

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$BTU PEABODY ENERGY CORP Stock $btu

2021 Q4 Form 10-K Financial Statement

#000106472822000008 Filed on February 18, 2022

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