$BTU
PEABODY ENERGY CORP Stock $btu

$btu Overview Financials Valuation SEC Filings Company Website

2012 Q2 Form 10-Q Financial Statement

#000106472812000059 Filed on August 03, 2012

Income Statement

Concept	2012 Q2	2011 Q2
Revenue	$1.981B	$1.962B
YoY Change	0.99%	20.36%
Cost Of Revenue	$1.466B	$1.312B
YoY Change	11.72%	11.7%
Gross Profit	$515.2M	$630.3M
YoY Change	-18.26%	29.5%
Gross Profit Margin	26.01%	32.13%
Selling, General & Admin	$62.70M	$58.60M
YoY Change	7.0%	-9.85%
% of Gross Profit	12.17%	9.3%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$155.3M	$104.1M
YoY Change	49.18%	-0.95%
% of Gross Profit	30.14%	16.52%
Operating Expenses	$62.70M	$58.60M
YoY Change	7.0%	-65.55%
Operating Profit	$276.7M	$479.4M
YoY Change	-42.28%	47.19%
Interest Expense	$106.9M	$48.90M
YoY Change	118.61%	-198.0%
% of Operating Profit	38.63%	10.2%
Other Income/Expense, Net
YoY Change
Pretax Income	$176.3M	$433.9M
YoY Change	-59.37%	61.84%
Income Tax	-$38.20M	$126.1M
% Of Pretax Income	-21.67%	29.06%
Net Earnings	$204.7M	$284.8M
YoY Change	-28.13%	38.12%
Net Earnings / Revenue	10.33%	14.52%
Basic Earnings Per Share	$0.75	$1.05
Diluted Earnings Per Share	$0.75	$1.05
COMMON SHARES
Basic Shares Outstanding	269.2M shares	269.0M shares
Diluted Shares Outstanding	269.8M shares	270.5M shares

Balance Sheet

Concept	2012 Q2	2011 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$489.0M	$1.252B
YoY Change	-60.94%	8.21%
Cash & Equivalents	$489.2M	$1.177B
Short-Term Investments		$75.00M
Other Short-Term Assets	$589.7M	$840.0M
YoY Change	-29.8%	101.92%
Inventory	$581.7M	$374.0M
Prepaid Expenses
Receivables	$816.2M	$645.0M
Other Receivables	$0.00	$0.00
Total Short-Term Assets	$2.575B	$3.110B
YoY Change	-17.22%	33.48%
LONG-TERM ASSETS
Property, Plant & Equipment	$12.44B	$7.584B
YoY Change	63.97%	4.66%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$1.684B	$1.051B
YoY Change	60.23%	101.73%
Other Assets	$1.684B
YoY Change
Total Long-Term Assets	$14.12B	$8.636B
YoY Change	63.49%	11.17%
TOTAL ASSETS
Total Short-Term Assets	$2.575B	$3.110B
Total Long-Term Assets	$14.12B	$8.636B
Total Assets	$16.69B	$11.75B
YoY Change	42.12%	16.32%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$1.597B	$1.336B
YoY Change	19.54%	21.34%
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00
YoY Change
Long-Term Debt Due	$121.0M	$44.00M
YoY Change	175.0%	25.71%
Total Short-Term Liabilities	$1.740B	$1.486B
YoY Change	17.09%	22.2%
LONG-TERM LIABILITIES
Long-Term Debt	$6.264B	$2.468B
YoY Change	153.81%	-9.53%
Other Long-Term Liabilities	$665.3M	$1.949B
YoY Change	-65.86%	4.62%
Total Long-Term Liabilities	$665.3M	$4.417B
YoY Change	-84.94%	-3.79%
TOTAL LIABILITIES
Total Short-Term Liabilities	$1.740B	$1.486B
Total Long-Term Liabilities	$665.3M	$4.417B
Total Liabilities	$10.82B	$6.530B
YoY Change	65.77%	6.3%
SHAREHOLDERS EQUITY
Retained Earnings	$4.075B
YoY Change
Common Stock	$2.270B
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)	$461.2M
YoY Change
Treasury Stock Shares	13.70M shares
Shareholders Equity	$5.834B	$5.215B
YoY Change
Total Liabilities & Shareholders Equity	$16.69B	$11.75B
YoY Change	42.12%	16.32%

Cashflow Statement

Concept	2012 Q2	2011 Q2
OPERATING ACTIVITIES
Net Income	$204.7M	$284.8M
YoY Change	-28.13%	38.12%
Depreciation, Depletion And Amortization	$155.3M	$104.1M
YoY Change	49.18%	-0.95%
Cash From Operating Activities	$280.0M	$395.0M
YoY Change	-29.11%	35.0%
INVESTING ACTIVITIES
Capital Expenditures	-$191.9M	-$224.8M
YoY Change	-14.64%	126.84%
Acquisitions
YoY Change
Other Investing Activities	-$120.9M	-$3.800M
YoY Change	3081.58%	-82.65%
Cash From Investing Activities	-$312.8M	-$228.6M
YoY Change	36.83%	88.93%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$99.90M
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-430.4M	-262.7M
YoY Change	63.84%	556.75%
NET CHANGE
Cash From Operating Activities	280.0M	395.0M
Cash From Investing Activities	-312.8M	-228.6M
Cash From Financing Activities	-430.4M	-262.7M
Net Change In Cash	-463.2M	-96.30M
YoY Change	381.0%	-173.18%
FREE CASH FLOW
Cash From Operating Activities	$280.0M	$395.0M
Capital Expenditures	-$191.9M	-$224.8M
Free Cash Flow	$471.9M	$619.8M
YoY Change	-23.86%	58.23%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2011Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	1712300000	USD
CY2011Q4	us-gaap	Accounts Receivable From Securitization AccountsReceivableFromSecuritization	150000000	USD
CY2012Q2	us-gaap	Accounts Receivable From Securitization AccountsReceivableFromSecuritization	182000000	USD
CY2011Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	922500000	USD
CY2012Q2	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	816200000	USD
CY2011Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	3412100000	USD
CY2012Q2	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	3711600000	USD
CY2012Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-53200000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-142400000	USD
CY2011Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	2234000000	USD
CY2012Q2	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	2270300000	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	24200000	USD
	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	3700000	USD
CY2011Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	17000000	USD
CY2012Q2	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	15900000	USD
CY2012Q2	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	400000	shares
CY2011Q2	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	100000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	300000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	100000	shares
CY2011Q2	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	15700000	USD
CY2012Q2	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	17300000	USD
	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	32500000	USD
	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	29000000	USD
CY2012Q2	us-gaap	Assets Assets	16693900000	USD
CY2011Q4	us-gaap	Assets Assets	16733000000	USD
CY2011Q4	us-gaap	Assets Current AssetsCurrent	3005900000	USD
CY2012Q2	us-gaap	Assets Current AssetsCurrent	2574500000	USD
CY2011Q4	us-gaap	Assets Of Disposal Group Including Discontinued Operation AssetsOfDisposalGroupIncludingDiscontinuedOperation	143700000	USD
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CY2012Q2	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	106900000	USD
CY2012Q2	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	100000	USD
	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	100000	USD
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CY2011Q4	us-gaap	Availableforsale Securities Gross Unrealized Gain AvailableforsaleSecuritiesGrossUnrealizedGain	300000	USD
CY2012Q2	us-gaap	Availableforsale Securities Gross Unrealized Gain AvailableforsaleSecuritiesGrossUnrealizedGain	400000	USD
CY2012Q2	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	1256700000	USD
CY2011Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	1131400000	USD
CY2011Q4	us-gaap	Capital Lease Obligations CapitalLeaseObligations	122800000	USD
CY2012Q2	us-gaap	Capital Lease Obligations CapitalLeaseObligations	116500000	USD
CY2012Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	489200000	USD
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	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-118300000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-309900000	USD
	us-gaap	Cash Provided By Used In Investing Activities Discontinued Operations CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations	-6500000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	1600000	USD
	us-gaap	Cash Provided By Used In Investing Activities Discontinued Operations CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations	-36600000	USD
	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	-54200000	USD
	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	-33900000	USD
	us-gaap	Coal Products And Services Revenue CoalProductsAndServicesRevenue	3519800000	USD
	us-gaap	Coal Products And Services Revenue CoalProductsAndServicesRevenue	3385300000	USD
CY2012Q2	us-gaap	Coal Products And Services Revenue CoalProductsAndServicesRevenue	1716800000	USD
CY2011Q2	us-gaap	Coal Products And Services Revenue CoalProductsAndServicesRevenue	1773300000	USD
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.170
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CY2012Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.085
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	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	22100000	USD
	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	-115400000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	27300000	USD
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CY2011Q4	us-gaap	Deferred Tax Liabilities Current DeferredTaxLiabilitiesCurrent	0	USD
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CY2011Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	554200000	USD
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	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	211800000	USD
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CY2011Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	19500000	USD
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	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.39
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	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.69
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	us-gaap	Fair Value Level1 To Level2 Transfers Amount FairValueLevel1ToLevel2TransfersAmount	0	USD
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	us-gaap	Fair Value Level2 To Level1 Transfers Amount FairValueLevel2ToLevel1TransfersAmount	0	USD
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	us-gaap	Gain Loss On Disposition Of Property GainLossOnDispositionOfProperty	7400000	USD
	us-gaap	Gain Loss On Disposition Of Property GainLossOnDispositionOfProperty	29700000	USD
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CY2012Q2	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	0	USD
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	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	USD
CY2012Q2	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	USD
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	388900000	USD
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	492800000	USD
CY2012Q2	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	212200000	USD
CY2011Q2	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	300400000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	701300000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	433800000	USD
CY2012Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	177500000	USD
CY2011Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	433900000	USD
CY2011Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	307800000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	397600000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	502400000	USD
CY2012Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	215300000	USD
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.43
CY2012Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.78
CY2011Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.11
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.82
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.43
CY2012Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.78
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.81
CY2011Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.10
CY2012Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-7500000	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-31500000	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-11500000	USD
CY2011Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-15600000	USD
CY2012Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-0.03
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-0.12
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-0.04
CY2011Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-0.06
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-0.04
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-0.12
CY2012Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-0.03
CY2011Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-0.05
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-5800000	USD
CY2011Q2	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-2800000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-29300000	USD
CY2012Q2	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-6600000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	36200000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	198900000	USD
CY2012Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-37800000	USD
CY2011Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	126100000	USD
	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-36500000	USD
CY2012Q2	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-43500000	USD
CY2011Q2	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	3500000	USD
	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	4500000	USD
	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-50600000	USD
CY2011Q2	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-31300000	USD
CY2012Q2	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-52100000	USD
	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-68700000	USD
	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	151800000	USD
CY2011Q2	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	151900000	USD
	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	245400000	USD
CY2012Q2	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	62100000	USD
CY2012Q2	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-17600000	USD
	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-34100000	USD
CY2011Q2	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-22400000	USD
	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-36200000	USD
	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	16600000	USD
	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	11100000	USD
CY2012Q2	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	9500000	USD
CY2011Q2	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	7000000	USD
	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	8700000	USD
CY2012Q2	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	6300000	USD
	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	6300000	USD
CY2011Q2	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	3900000	USD
CY2011Q2	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	4800000	USD
	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	10000000	USD
	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	8300000	USD
CY2012Q2	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	5100000	USD
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	3600000	USD
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-168000000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-93500000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	80400000	USD
	us-gaap	Increase Decrease In Accounts Receivable From Securitization IncreaseDecreaseInAccountsReceivableFromSecuritization	-32000000	USD
	us-gaap	Increase Decrease In Accounts Receivable From Securitization IncreaseDecreaseInAccountsReceivableFromSecuritization	0	USD
	us-gaap	Increase Decrease In Asset Retirement Obligations IncreaseDecreaseInAssetRetirementObligations	26000000	USD
	us-gaap	Increase Decrease In Asset Retirement Obligations IncreaseDecreaseInAssetRetirementObligations	20600000	USD
	us-gaap	Increase Decrease In Due To Related Parties IncreaseDecreaseInDueToRelatedParties	-627600000	USD
	us-gaap	Increase Decrease In Due To Related Parties IncreaseDecreaseInDueToRelatedParties	0	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	142100000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	28900000	USD
	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	18900000	USD
	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-24400000	USD
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-29600000	USD
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-3000000	USD
	us-gaap	Increase Decrease In Postretirement Obligations IncreaseDecreaseInPostretirementObligations	18500000	USD
	us-gaap	Increase Decrease In Postretirement Obligations IncreaseDecreaseInPostretirementObligations	19000000	USD
	us-gaap	Interest Expense InterestExpense	99900000	USD
CY2012Q2	us-gaap	Interest Expense InterestExpense	106900000	USD
	us-gaap	Interest Expense InterestExpense	208900000	USD
CY2011Q2	us-gaap	Interest Expense InterestExpense	48900000	USD
CY2012Q2	us-gaap	Interest Rate Derivative Assets At Fair Value InterestRateDerivativeAssetsAtFairValue	0	USD
CY2012Q2	us-gaap	Inventory Net InventoryNet	581700000	USD
CY2011Q4	us-gaap	Inventory Net InventoryNet	446300000	USD
CY2011Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	124900000	USD
CY2012Q2	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	149500000	USD
CY2011Q2	us-gaap	Investment Income Interest InvestmentIncomeInterest	3500000	USD
	us-gaap	Investment Income Interest InvestmentIncomeInterest	7600000	USD
	us-gaap	Investment Income Interest InvestmentIncomeInterest	14600000	USD
CY2012Q2	us-gaap	Investment Income Interest InvestmentIncomeInterest	6500000	USD
	us-gaap	Investments In And Advances To Affiliates At Fair Value Gross Additions InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossAdditions	0	USD
	us-gaap	Investments In And Advances To Affiliates At Fair Value Gross Additions InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossAdditions	-375600000	USD
CY2011Q4	us-gaap	Liabilities Liabilities	11217200000	USD
CY2012Q2	us-gaap	Liabilities Liabilities	10824500000	USD
CY2011Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	16733000000	USD
CY2012Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	16693900000	USD
CY2011Q4	us-gaap	Liabilities Current LiabilitiesCurrent	1823700000	USD
CY2012Q2	us-gaap	Liabilities Current LiabilitiesCurrent	1739900000	USD
CY2011Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation	86300000	USD
CY2012Q2	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation	56000000	USD
CY2011Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation Current LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent	63900000	USD
CY2012Q2	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation Current LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent	40400000	USD
CY2011Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	6556400000	USD
CY2012Q2	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	6264000000	USD
CY2012Q2	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	121400000	USD
CY2011Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	101100000	USD
CY2012Q2	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	2954700000	USD
CY2011Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	2862400000	USD
CY2011Q4	us-gaap	Mine Reclamation And Closing Liability Noncurrent MineReclamationAndClosingLiabilityNoncurrent	621300000	USD
CY2012Q2	us-gaap	Mine Reclamation And Closing Liability Noncurrent MineReclamationAndClosingLiabilityNoncurrent	645400000	USD
CY2011Q4	us-gaap	Minority Interest MinorityInterest	30700000	USD
CY2012Q2	us-gaap	Minority Interest MinorityInterest	35600000	USD
	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	3800000	USD
	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	-49800000	USD
	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	0	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-469500000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-294100000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-439800000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-515900000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-403200000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-509400000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	675500000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	615600000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	649500000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	729700000	USD
CY2011Q2	us-gaap	Net Income Loss NetIncomeLoss	284800000	USD
	us-gaap	Net Income Loss NetIncomeLoss	377400000	USD
	us-gaap	Net Income Loss NetIncomeLoss	461300000	USD
CY2012Q2	us-gaap	Net Income Loss NetIncomeLoss	204700000	USD
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	9600000	USD
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	8700000	USD
CY2011Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	7400000	USD
CY2012Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	3100000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	458700000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	374800000	USD
CY2012Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	203200000	USD
CY2011Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	283100000	USD
CY2011Q4	us-gaap	Notes Payable Related Parties Noncurrent NotesPayableRelatedPartiesNoncurrent	0	USD
CY2012Q2	us-gaap	Notes Payable Related Parties Noncurrent NotesPayableRelatedPartiesNoncurrent	0	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	793600000	USD
CY2012Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	277900000	USD
CY2011Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	479300000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	628100000	USD
CY2012Q2	us-gaap	Other Assets Current OtherAssetsCurrent	589700000	USD
CY2011Q4	us-gaap	Other Assets Current OtherAssetsCurrent	766100000	USD
CY2012Q2	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	1683800000	USD
CY2011Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	2364400000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Available For Sale Securities Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesTax	-1500000	USD
CY2011Q2	us-gaap	Other Comprehensive Income Available For Sale Securities Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesTax	-300000	USD
	us-gaap	Other Comprehensive Income Available For Sale Securities Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesTax	-8200000	USD
	us-gaap	Other Comprehensive Income Available For Sale Securities Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesTax	-300000	USD
	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Period Increase Decrease OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecrease	23500000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Period Increase Decrease OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecrease	13800000	USD
CY2011Q2	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Period Increase Decrease OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecrease	10000000	USD
	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Period Increase Decrease OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecrease	27700000	USD
	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax OtherComprehensiveIncomeDefinedBenefitPlansTax	16100000	USD
	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Period Increase Decrease OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecrease	96800000	USD
	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Period Increase Decrease OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecrease	69000000	USD
CY2011Q2	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Period Increase Decrease OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecrease	64300000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Period Increase Decrease OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecrease	5400000	USD
	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Tax Effect Period Increase Decrease OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxEffectPeriodIncreaseDecrease	2900000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Tax Effect Period Increase Decrease OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxEffectPeriodIncreaseDecrease	-28500000	USD
	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Tax Effect Period Increase Decrease OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxEffectPeriodIncreaseDecrease	73600000	USD
CY2011Q2	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Tax Effect Period Increase Decrease OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxEffectPeriodIncreaseDecrease	39300000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Period Increase Decrease OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPeriodIncreaseDecrease	0	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Period Increase Decrease OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPeriodIncreaseDecrease	6600000	USD
CY2011Q2	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Period Increase Decrease OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPeriodIncreaseDecrease	0	USD
CY2012Q2	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Period Increase Decrease OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPeriodIncreaseDecrease	-6100000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Period Increase Decrease OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease	10500000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Period Increase Decrease OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease	120500000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Period Increase Decrease OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease	89200000	USD
CY2011Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Period Increase Decrease OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease	73500000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	-37300000	USD
	us-gaap	Other Comprehensive Income Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	-121500000	USD
CY2011Q2	us-gaap	Other Comprehensive Income Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	-62800000	USD
	us-gaap	Other Comprehensive Income Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	-118800000	USD
CY2011Q2	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	127100000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	42700000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	190500000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	215600000	USD
CY2011Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-800000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-2600000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-14100000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	200000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	8200000	USD
CY2011Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	608500000	USD
CY2012Q2	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	665300000	USD
CY2012Q2	us-gaap	Other Long Term Debt OtherLongTermDebt	43100000	USD
CY2011Q4	us-gaap	Other Long Term Debt OtherLongTermDebt	43400000	USD
CY2011Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	1053100000	USD
CY2012Q2	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	1053900000	USD
	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	517000000	USD
CY2012Q2	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	281400000	USD
CY2011Q2	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	207200000	USD
	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	338300000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	4300000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	99900000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	46800000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	46300000	USD
	us-gaap	Payments To Acquire Interest In Joint Venture PaymentsToAcquireInterestInJointVenture	6700000	USD
	us-gaap	Payments To Acquire Interest In Joint Venture PaymentsToAcquireInterestInJointVenture	21500000	USD
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	24300000	USD
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	14600000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	318400000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	427600000	USD
	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	0	USD
	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	100000000	USD
	us-gaap	Pension Contributions PensionContributions	900000	USD
	us-gaap	Pension Contributions PensionContributions	900000	USD
	us-gaap	Pension Expense PensionExpense	17700000	USD
	us-gaap	Pension Expense PensionExpense	24800000	USD
CY2012Q2	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	1500000	USD
CY2011Q2	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	1700000	USD
	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	2600000	USD
	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	2600000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1400000	USD
	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	1400000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	25000000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-900000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	10800000	USD
	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	27600000	USD
	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	21000000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	9800000	USD
CY2012Q2	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	8100000	USD
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	12600000	USD
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	9600000	USD
	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	0	USD
	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	25000000	USD
	us-gaap	Profit Loss ProfitLoss	386100000	USD
CY2012Q2	us-gaap	Profit Loss ProfitLoss	207800000	USD
CY2011Q2	us-gaap	Profit Loss ProfitLoss	292200000	USD
	us-gaap	Profit Loss ProfitLoss	470900000	USD
CY2012Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	12435600000	USD
CY2011Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	11362700000	USD
CY2011Q4	us-gaap	Related Party Transaction Due From To Related Party Current RelatedPartyTransactionDueFromToRelatedPartyCurrent	0	USD
CY2012Q2	us-gaap	Related Party Transaction Due From To Related Party Current RelatedPartyTransactionDueFromToRelatedPartyCurrent	0	USD
	us-gaap	Repayment Of Notes Receivable From Related Parties RepaymentOfNotesReceivableFromRelatedParties	618700000	USD
	us-gaap	Repayment Of Notes Receivable From Related Parties RepaymentOfNotesReceivableFromRelatedParties	0	USD
	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	238200000	USD
	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	280000000	USD
CY2012Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	4075100000	USD
CY2011Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	3744000000	USD
CY2012Q2	us-gaap	Revenues Revenues	1998200000	USD
	us-gaap	Revenues Revenues	3723600000	USD
CY2011Q2	us-gaap	Revenues Revenues	1980500000	USD
	us-gaap	Revenues Revenues	4036800000	USD
	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	133700000	USD
CY2012Q2	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	62700000	USD
	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	120200000	USD
CY2011Q2	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	58600000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	24200000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	21900000	USD
	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	3300000	USD
	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	1500000	USD
CY2011Q4	us-gaap	Stockholders Equity StockholdersEquity	5485100000	USD
CY2012Q2	us-gaap	Stockholders Equity StockholdersEquity	5833800000	USD
CY2012Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	5869400000	USD
CY2011Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	5515800000	USD
CY2012Q2	us-gaap	Treasury Stock Shares TreasuryStockShares	13700000	shares
CY2011Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	9200000	shares
CY2012Q2	us-gaap	Treasury Stock Value TreasuryStockValue	461200000	USD
CY2011Q4	us-gaap	Treasury Stock Value TreasuryStockValue	353300000	USD
CY2012Q2	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	0	USD
	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	0	USD
CY2012Q2	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	1100000	USD
	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	17400000	USD
CY2012Q2	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	600000	shares
CY2011Q2	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	1500000	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	1600000	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	500000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	270200000	shares
CY2012Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	269800000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	270600000	shares
CY2011Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	270500000	shares
CY2012Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	269200000	shares
CY2011Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	269000000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	269000000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	269700000	shares
CY2012Q2	us-gaap	Write Off Of Deferred Debt Issuance Cost WriteOffOfDeferredDebtIssuanceCost	3400000	USD
	btu	Additional Cash Upon Collection Of Underlying Receivables AdditionalCashUponCollectionOfUnderlyingReceivables	525700000	USD
CY2012Q2	btu	Amount Available Under Securitization Program AmountAvailableUnderSecuritizationProgram	0	USD
CY2012Q2	btu	Amount In Letters Of Credit And Surety Bonds Related To Collateral For Surety Companies Road Maintenance Performance Guarantees And Other Operations AmountInLettersOfCreditAndSuretyBondsRelatedToCollateralForSuretyCompaniesRoadMaintenancePerformanceGuaranteesAndOtherOperations	203500000	USD
	btu	Mrrt Market Value Starting Base Deferred Tax Asset MrrtMarketValueStartingBaseDeferredTaxAsset	0	USD
	btu	Annualpaymentsoncoalreserves2012 To2016 Annualpaymentsoncoalreserves2012To2016	247900000	USD
CY2012Q2	btu	Assets From Coal Trading Activities Net AssetsFromCoalTradingActivitiesNet	80300000	USD
CY2011Q4	btu	Assets From Coal Trading Activities Net AssetsFromCoalTradingActivitiesNet	44600000	USD
	btu	Capacity Of New Electricity Generation Project CapacityOfNewElectricityGenerationProject	1600
	btu	Cash Up Front From Sale Of Receivables CashUpFrontFromSaleOfReceivables	1299800000	USD
CY2012Q2	btu	Business Acquisition Percent Of Agreed Sale Price As Installment Payment BusinessAcquisitionPercentOfAgreedSalePriceAsInstallmentPayment	0.40
CY2012Q2	btu	Business Acquisition Percentage Of Agreed Sale Price As Consideration BusinessAcquisitionPercentageOfAgreedSalePriceAsConsideration	0.20
CY2012Q2	btu	Business Acquisition Percentage Of Agreed Sale Price As Final Installment Payment BusinessAcquisitionPercentageOfAgreedSalePriceAsFinalInstallmentPayment	0.40
CY2012Q1	btu	Business Combinations Recognized Identifiable Assets Acquired And Liabilities Assumed Noncontrolling Interest BusinessCombinationsRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncontrollingInterest	53400000	USD
	btu	Changes In Tax Reserves ChangesInTaxReserves	4900000	USD
CY2011Q2	btu	Changes In Tax Reserves ChangesInTaxReserves	2900000	USD
	btu	Changes In Tax Reserves ChangesInTaxReserves	13300000	USD
CY2012Q2	btu	Changes In Tax Reserves ChangesInTaxReserves	16400000	USD
CY2012Q2	btu	Commencementof800 Megawattgenerationunit Commencementof800Megawattgenerationunit	800
	btu	Consideration Received By Company Related To Securitization Program ConsiderationReceivedByCompanyRelatedToSecuritizationProgram	2157600000	USD
CY2012Q2	btu	Consideration Received By Company Upon Completion Of Sell Down ConsiderationReceivedByCompanyUponCompletionOfSellDown	15000000	AUD
CY2012Q1	btu	Equity Interest Converted From Receivable Per Court Ruling EquityInterestConvertedFromReceivablePerCourtRuling	0.90
	btu	Expenses Associated With Securitization Transactions ExpensesAssociatedWithSecuritizationTransactions	1100000	USD
	btu	Expenses Associated With Securitization Transactions ExpensesAssociatedWithSecuritizationTransactions	900000	USD
CY2012Q2	btu	Expenses Associated With Securitization Transactions ExpensesAssociatedWithSecuritizationTransactions	400000	USD
CY2011Q2	btu	Expenses Associated With Securitization Transactions ExpensesAssociatedWithSecuritizationTransactions	500000	USD
	btu	Federal Coal Lease Expenditures FederalCoalLeaseExpenditures	-89200000	USD
	btu	Federal Coal Lease Expenditures FederalCoalLeaseExpenditures	0	USD
CY2012Q2	btu	Funding Threshhold FundingThreshhold	0.80
CY2012Q2	btu	Income From Continuing Operations Attributable To Common Stockholders IncomeFromContinuingOperationsAttributableToCommonStockholders	210700000	USD
	btu	Income From Continuing Operations Attributable To Common Stockholders IncomeFromContinuingOperationsAttributableToCommonStockholders	386300000	USD
	btu	Income From Continuing Operations Attributable To Common Stockholders IncomeFromContinuingOperationsAttributableToCommonStockholders	490200000	USD
CY2011Q2	btu	Income From Continuing Operations Attributable To Common Stockholders IncomeFromContinuingOperationsAttributableToCommonStockholders	298700000	USD
CY2012Q2	btu	Land And Coal Interests LandAndCoalInterests	11935800000	USD
CY2011Q4	btu	Land And Coal Interests LandAndCoalInterests	10781000000	USD
CY2012Q2	btu	Leasedcoalreservesadjacenttonarm Leasedcoalreservesadjacenttonarm	1100000000
CY2011Q4	btu	Liabilities From Coal Trading Activities Net LiabilitiesFromCoalTradingActivitiesNet	10300000	USD
CY2012Q2	btu	Liabilities From Coal Trading Activities Net LiabilitiesFromCoalTradingActivitiesNet	22000000	USD
CY2011Q3	btu	Litigation Settlement Damages Awarded To Plaintiff LitigationSettlementDamagesAwardedToPlaintiff	20500000	USD
	btu	Long Term Investments Maturity Period Description LongTermInvestmentsMaturityPeriodDescription	Greater than one year
CY2012Q2	btu	Loss From Equity Affiliates Amortization Of Basis Difference LossFromEquityAffiliatesAmortizationOfBasisDifference	900000	USD
	btu	Loss From Equity Affiliates Amortization Of Basis Difference LossFromEquityAffiliatesAmortizationOfBasisDifference	0	USD
	btu	Loss From Equity Affiliates Amortization Of Basis Difference LossFromEquityAffiliatesAmortizationOfBasisDifference	3200000	USD
CY2011Q2	btu	Loss From Equity Affiliates Amortization Of Basis Difference LossFromEquityAffiliatesAmortizationOfBasisDifference	0	USD
CY2012Q2	btu	Margin Posted To Counterparties Related To Credit Rating MarginPostedToCounterpartiesRelatedToCreditRating	0	USD
CY2011Q4	btu	Margin Posted To Counterparties Related To Credit Rating MarginPostedToCounterpartiesRelatedToCreditRating	0	USD
CY2012Q2	btu	Maximum Capacity Of Securitization Program MaximumCapacityOfSecuritizationProgram	275000000	USD
CY2012	btu	Minimum Contribution In2012 To Unqualified Plan MinimumContributionIn2012ToUnqualifiedPlan	2000000	USD
CY2012	btu	Minimum Contributions In2012 On Qualified Plan MinimumContributionsIn2012OnQualifiedPlan	5000000	USD
CY2012Q2	btu	Mrrt Effective Tax Rate MrrtEffectiveTaxRate	0.225
	btu	Net Assets From Coal Trading Activities NetAssetsFromCoalTradingActivities	-19600000	USD
	btu	Net Assets From Coal Trading Activities NetAssetsFromCoalTradingActivities	161400000	USD
CY2012Q2	btu	Non Collected Receivables NonCollectedReceivables	332100000	USD
	btu	Noncontrolling Interest Increase From Business Combination As Of Control Date NoncontrollingInterestIncreaseFromBusinessCombinationAsOfControlDate	53400000	USD
	btu	Operating Costs And Expense OperatingCostsAndExpense	2592900000	USD
CY2012Q2	btu	Operating Costs And Expense OperatingCostsAndExpense	1479800000	USD
	btu	Operating Costs And Expense OperatingCostsAndExpense	2918400000	USD
CY2011Q2	btu	Operating Costs And Expense OperatingCostsAndExpense	1345700000	USD
CY2011Q2	btu	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax	0	USD
CY2012Q2	btu	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax	0	USD
	btu	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax	3500000	USD
	btu	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax	0	USD
CY2012Q2	btu	Other Comprehensive Income Loss Reclassification And Amortization Pension And Other Postretirement Benefit Plans Net Gain Loss And Net Prior Service Cost Recognized Net Of Tax OtherComprehensiveIncomeLossReclassificationAndAmortizationPensionAndOtherPostretirementBenefitPlansNetGainLossAndNetPriorServiceCostRecognizedNetOfTax	13800000	USD
CY2011Q2	btu	Other Comprehensive Income Loss Reclassification And Amortization Pension And Other Postretirement Benefit Plans Net Gain Loss And Net Prior Service Cost Recognized Net Of Tax OtherComprehensiveIncomeLossReclassificationAndAmortizationPensionAndOtherPostretirementBenefitPlansNetGainLossAndNetPriorServiceCostRecognizedNetOfTax	10000000	USD
	btu	Other Comprehensive Income Loss Reclassification And Amortization Pension And Other Postretirement Benefit Plans Net Gain Loss And Net Prior Service Cost Recognized Net Of Tax OtherComprehensiveIncomeLossReclassificationAndAmortizationPensionAndOtherPostretirementBenefitPlansNetGainLossAndNetPriorServiceCostRecognizedNetOfTax	20000000	USD
	btu	Other Comprehensive Income Loss Reclassification And Amortization Pension And Other Postretirement Benefit Plans Net Gain Loss And Net Prior Service Cost Recognized Net Of Tax OtherComprehensiveIncomeLossReclassificationAndAmortizationPensionAndOtherPostretirementBenefitPlansNetGainLossAndNetPriorServiceCostRecognizedNetOfTax	27700000	USD
CY2011Q4	btu	Other Noncurrent Liability OtherNoncurrentLiability	2282900000	USD
CY2012Q2	btu	Other Noncurrent Liability OtherNoncurrentLiability	2364600000	USD
CY2011Q4	btu	Patriot Collateral Posted With Department Of Labor PatriotCollateralPostedWithDepartmentOfLabor	15000000	USD
	btu	Payments For Repurchase Of Common Stock Relinquished For Tax Withholding PaymentsForRepurchaseOfCommonStockRelinquishedForTaxWithholding	15400000	USD
	btu	Payments For Repurchase Of Common Stock Relinquished For Tax Withholding PaymentsForRepurchaseOfCommonStockRelinquishedForTaxWithholding	8000000	USD
CY2012Q2	btu	Potential Exposure From Patriot Bankruptcy PotentialExposureFromPatriotBankruptcy	150000000	USD
CY2011Q2	btu	Project Development Fee Received ProjectDevelopmentFeeReceived	14600000	USD
CY2011Q4	btu	Raw Coal RawCoal	95000000	USD
CY2012Q2	btu	Raw Coal RawCoal	157500000	USD
	btu	Reallocation Adjustment For Participating Securities ReallocationAdjustmentForParticipatingSecurities	100000	USD
	btu	Reallocation Adjustment For Participating Securities ReallocationAdjustmentForParticipatingSecurities	100000	USD
CY2012Q2	btu	Reallocation Adjustment For Participating Securities ReallocationAdjustmentForParticipatingSecurities	100000	USD
CY2011Q2	btu	Reallocation Adjustment For Participating Securities ReallocationAdjustmentForParticipatingSecurities	100000	USD
CY2011Q2	btu	Recognized Gain On Coal Reserves Exchange RecognizedGainOnCoalReservesExchange	23500000	USD
CY2011Q2	btu	Remeasurement Of Foreign Taxes RemeasurementOfForeignTaxes	15400000	USD
CY2012Q2	btu	Remeasurement Of Foreign Taxes RemeasurementOfForeignTaxes	-13800000	USD
	btu	Remeasurement Of Foreign Taxes RemeasurementOfForeignTaxes	-4900000	USD
	btu	Remeasurement Of Foreign Taxes RemeasurementOfForeignTaxes	21800000	USD
	btu	Sale Of Business Percentage Of Ownership Before Transaction SaleOfBusinessPercentageOfOwnershipBeforeTransaction	0.85
CY2011Q4	btu	Saleable Coal SaleableCoal	226400000	USD
CY2012Q2	btu	Saleable Coal SaleableCoal	274700000	USD
CY2011Q2	btu	Segment Reporting Information Adjusted Earning Before Interest Taxes Depreciation And Amortization SegmentReportingInformationAdjustedEarningBeforeInterestTaxesDepreciationAndAmortization	599100000	USD
	btu	Segment Reporting Information Adjusted Earning Before Interest Taxes Depreciation And Amortization SegmentReportingInformationAdjustedEarningBeforeInterestTaxesDepreciationAndAmortization	1034400000	USD
	btu	Segment Reporting Information Adjusted Earning Before Interest Taxes Depreciation And Amortization SegmentReportingInformationAdjustedEarningBeforeInterestTaxesDepreciationAndAmortization	966000000	USD
CY2012Q2	btu	Segment Reporting Information Adjusted Earning Before Interest Taxes Depreciation And Amortization SegmentReportingInformationAdjustedEarningBeforeInterestTaxesDepreciationAndAmortization	453400000	USD
	btu	Shares Relinquished SharesRelinquished	-8000000	USD
	btu	Short Term Investments Maturity Period Description ShortTermInvestmentsMaturityPeriodDescription	Greater than three months and up to one year
	btu	Tax Impact Related To Postretirement Plans And Workers Compensation Obligations TaxImpactRelatedToPostretirementPlansAndWorkersCompensationObligations	-16100000	USD
CY2011Q2	btu	Tax Impact Related To Postretirement Plans And Workers Compensation Obligations TaxImpactRelatedToPostretirementPlansAndWorkersCompensationObligations	-6300000	USD
CY2012Q2	btu	Tax Impact Related To Postretirement Plans And Workers Compensation Obligations TaxImpactRelatedToPostretirementPlansAndWorkersCompensationObligations	-8000000	USD
	btu	Tax Impact Related To Postretirement Plans And Workers Compensation Obligations TaxImpactRelatedToPostretirementPlansAndWorkersCompensationObligations	-6500000	USD
	btu	Time Period Of Lease That Permits Partnership To Purchase Terminal TimePeriodOfLeaseThatPermitsPartnershipToPurchaseTerminal	P30Y
	btu	Transactions With Affiliates Net TransactionsWithAffiliatesNet	0	USD
	btu	Transactions With Affiliates Net TransactionsWithAffiliatesNet	0	USD
	btu	Unrecognized Tax Benefits Decrease UnrecognizedTaxBenefitsDecrease	13400000	USD
CY2012Q2	btu	Weightedaveragebidpricepermineabletononcoalreserves Weightedaveragebidpricepermineabletononcoalreserves	1.10	USD
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q2
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2012
	dei	Document Period End Date DocumentPeriodEndDate	2012-06-30
	dei	Document Type DocumentType	10-Q
	dei	Entity Central Index Key EntityCentralIndexKey	0001064728
CY2012Q3	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	268332565	shares
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Registrant Name EntityRegistrantName	PEABODY ENERGY CORP

Files In Submission

Name	View Source	Status
0001064728-12-000059-index-headers.html	Edgar Link	pending
0001064728-12-000059-index.html	Edgar Link	pending
0001064728-12-000059.txt	Edgar Link	pending
0001064728-12-000059-xbrl.zip	Edgar Link	pending
btu-20120630.xml	Edgar Link	completed
btu-20120630.xsd	Edgar Link	pending
btu-20120630_cal.xml	Edgar Link	unprocessable
btu-20120630_def.xml	Edgar Link	unprocessable
btu-20120630_lab.xml	Edgar Link	unprocessable
btu-20120630_pre.xml	Edgar Link	unprocessable
btu_2012063010q.htm	Edgar Link	pending
btu_20120630xex311.htm	Edgar Link	pending
btu_20120630xex312.htm	Edgar Link	pending
btu_20120630xex321.htm	Edgar Link	pending
btu_20120630xex322.htm	Edgar Link	pending
btu_20120630xex95.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xls	Edgar Link	pending
peabodya02.gif	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$BTU
PEABODY ENERGY CORP Stock $btu

2012 Q2 Form 10-Q Financial Statement

#000106472812000059 Filed on August 03, 2012

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$BTU PEABODY ENERGY CORP Stock $btu

2012 Q2 Form 10-Q Financial Statement

#000106472812000059 Filed on August 03, 2012

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$BTU
PEABODY ENERGY CORP Stock $btu