XML 88 R75.htm IDEA: XBRL DOCUMENT
v3.19.2

Long-term Debt - Textuals (Details) | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 27 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 30, 2018 USD ($) | Jun. 30, 2019 USD ($) | Jun. 30, 2018 USD ($) | Jun. 30, 2019 USD ($) | Jun. 30, 2018 USD ($) | Dec. 31, 2018 USD ($) | Jun. 30, 2019 USD ($) | Oct. 01, 2018 | Aug. 09, 2018 USD ($) | Sep. 18, 2017 USD ($) | Apr. 03, 2017 USD ($) | Feb. 15, 2017 USD ($) subsidiaries
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of Subsidiaries | subsidiaries |  |  |  |  |  |  |  |  |  |  |  | 1
Debt issuance cost |  | $ 62,900,000 |  | $ 62,900,000 |  | $ 68,900,000 | $ 62,900,000 |  |  |  |  |
Interest expense |  | $ 36,000,000.0 | $ 38,300,000 | 71,800,000 | $ 74,600,000 |  |  |  |  |  |  |
Repayment of Long-term Debt, Long-term Lease Obligation, and Capital Security |  |  |  | $ 17,500,000 | 63,500,000 |  |  |  |  |  |  |
Successor Credit Agreement |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Covenant, Fixed Charge Coverage Ratio |  | 2.25 |  |  |  |  |  |  |  |  |  |
Senior Notes | 6.000% Senior Secured Notes due March 2022 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate |  | 6.00% |  | 6.00% |  | 6.00% | 6.00% |  |  |  |  |
Debt Instrument, Restricted Payments, Amount Paid |  |  |  |  |  |  |  |  | $ 10.00 |  |  |
Debt Instrument, Restricted Payments, Principal Amount Used to Calculate Payments |  |  |  |  |  |  |  |  | 1,000 |  |  |
Long-term debt |  | $ 500,000,000.0 |  | $ 500,000,000.0 |  | $ 500,000,000.0 | $ 500,000,000.0 |  |  |  |  |
Senior Notes | 6.000% Senior Secured Notes due March 2022 | Debt Instrument, Redemption, Period One |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Redemption price, percentage |  | 103.00% |  |  |  |  |  |  |  |  |  |
Senior Notes | 6.000% Senior Secured Notes due March 2022 | Debt Instrument, Redemption, Period Two |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Redemption price, percentage |  | 101.50% |  |  |  |  |  |  |  |  |  |
Senior Notes | 6.000% Senior Secured Notes due March 2022 | Effect of Plan |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  |  |  |  |  |  |  |  | $ 500,000,000.0
Stated interest rate |  |  |  |  |  |  |  |  |  |  |  | 6.00%
Senior Notes | 6.375% Senior Secured Notes due March 2025 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate |  | 6.375% |  | 6.375% |  | 6.375% | 6.375% |  |  |  |  |
Debt Instrument, Restricted Payments, Amount Paid |  |  |  |  |  |  |  |  | 30.00 |  |  |
Debt Instrument, Restricted Payments, Principal Amount Used to Calculate Payments |  |  |  |  |  |  |  |  | 1,000 |  |  |
Long-term debt |  | $ 500,000,000.0 |  | $ 500,000,000.0 |  | $ 500,000,000.0 | $ 500,000,000.0 |  |  |  |  |
Senior Notes | 6.375% Senior Secured Notes due March 2025 | Debt Instrument, Redemption, Period One |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Redemption price, percentage |  | 104.80% |  |  |  |  |  |  |  |  |  |
Senior Notes | 6.375% Senior Secured Notes due March 2025 | Debt Instrument, Redemption, Period Two |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Redemption price, percentage |  | 103.20% |  |  |  |  |  |  |  |  |  |
Senior Notes | 6.375% Senior Secured Notes due March 2025 | Debt Instrument, Redemption, Period Three |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Redemption price, percentage |  | 101.60% |  |  |  |  |  |  |  |  |  |
Senior Notes | 6.375% Senior Secured Notes due March 2025 | Effect of Plan |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  |  |  |  |  |  |  |  | $ 500,000,000.0
Stated interest rate |  |  |  |  |  |  |  |  |  |  |  | 6.375%
Senior Notes | 6.00% And 6.375% Senior Secured Notes, Successor Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt issuance cost |  | $ 49,500,000 |  | 49,500,000 |  |  | $ 49,500,000 |  |  |  |  |
Interest expense |  | $ 18,600,000 | 17,500,000 | $ 36,100,000 | 34,900,000 |  |  |  |  |  |  |
Senior Notes | 6.00% And 6.375% Senior Secured Notes, Successor Notes | Domestic |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Collateral, capital stock, percent |  | 100.00% |  | 100.00% |  |  | 100.00% |  |  |  |  |
Senior Notes | 6.00% And 6.375% Senior Secured Notes, Successor Notes | Export |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Collateral, non-voting capital stock, percent |  | 100.00% |  | 100.00% |  |  | 100.00% |  |  |  |  |
Collateral, voting capital stock, percent |  | 65.00% |  | 65.00% |  |  | 65.00% |  |  |  |  |
Senior Notes | 6.00% And 6.375% Senior Secured Notes, Successor Notes | Peabody Investments (Gibraltar) Limited |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Collateral, non-voting capital stock, percent |  | 100.00% |  | 100.00% |  |  | 100.00% |  |  |  |  |
Collateral, voting capital stock, percent |  | 65.00% |  | 65.00% |  |  | 65.00% |  |  |  |  |
Senior Notes | Successor Credit Agreement |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Restricted Payments Basket |  |  |  |  |  |  |  |  | 650,000,000.0 |  |  |
Debt Instrument, Restricted Payments Basket, Annual Limit |  |  |  |  |  |  |  |  | 150,000,000.0 |  |  |
Aggregate consent payments |  |  |  |  |  |  |  |  | $ 19,800,000 |  |  |
Other Expenses |  |  |  |  |  | 1,500,000 |  |  |  |  |  |
Term Loan | Successor Credit Agreement |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Principal amount |  | $ 400,000,000.0 |  | $ 400,000,000.0 |  |  | $ 400,000,000.0 |  |  |  |  |
Interest expense |  | 5,700,000 | 6,600,000 | 11,400,000 | 13,400,000 |  |  |  |  |  |  |
Debt Instrument, Restricted Payments Basket |  |  |  |  |  |  |  |  |  | $ 450,000,000.0 |  |
Original issue discount and deferred finance costs |  | $ 37,300,000 |  | $ 37,300,000 |  |  | $ 37,300,000 |  |  |  |  |
Debt Instrument, Principal Prepayment, Percent of Principal Amount if Repaid Before October 2018 |  |  |  |  |  |  |  | 101.00% |  |  |  |
Mandatory principal prepayment, percent of excess cash flow |  | 75.00% |  | 75.00% |  |  | 75.00% |  |  |  |  |
Mandatory principal prepayment, if required, period payable, threshold |  | 100 days |  |  |  |  |  |  |  |  |  |
Excess proceeds from sales of assets, threshold ($10 million or greater) |  | $ 10,000,000.0 |  | $ 10,000,000.0 |  |  | $ 10,000,000.0 |  |  |  |  |
Repayments of Debt |  |  |  |  |  |  | 555,000,000.0 |  |  |  |  |
Payment for Debt Extinguishment or Debt Prepayment Cost |  |  |  |  |  |  | 546,000,000.0 |  |  |  |  |
Restricted payments threshold |  | $ 450,000,000.0 |  | $ 450,000,000.0 |  |  | $ 450,000,000.0 |  |  | $ 50,000,000.0 |  |
Debt Instrument, Covenant, Fixed Charge Coverage Ratio |  | 2.00 |  |  |  |  |  |  |  |  |  |
Repayment of Long-term Debt, Long-term Lease Obligation, and Capital Security | $ 46,000,000.0 |  |  |  |  |  |  |  |  |  |  |
Term Loan | Successor Credit Agreement | Total Leverage Ratio Less or Equal to 2.00 to 1.00 Greater Than 1.50 to 1.00 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Mandatory principal prepayment, percent of excess cash flow |  | 50.00% |  | 50.00% |  |  | 50.00% |  |  |  |  |
Term Loan | Successor Credit Agreement | Total Leverage Ratio Less or Equal to 2.00 to 1.00 Greater Than 1.50 to 1.00 | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total Leverage Ratio |  | 2.00 |  | 2.00 |  |  | 2.00 |  |  |  |  |
Term Loan | Successor Credit Agreement | Total Leverage Ratio Less or Equal to 2.00 to 1.00 Greater Than 1.50 to 1.00 | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total Leverage Ratio |  | 1.50 |  | 1.50 |  |  | 1.50 |  |  |  |  |
Term Loan | Successor Credit Agreement | Total Leverage Ratio Less or Equal to 1.50 to 1.00 Greater Than 1.00 to 1.00 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Mandatory principal prepayment, percent of excess cash flow |  | 25.00% |  | 25.00% |  |  | 25.00% |  |  |  |  |
Term Loan | Successor Credit Agreement | Total Leverage Ratio Less or Equal to 1.50 to 1.00 Greater Than 1.00 to 1.00 | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total Leverage Ratio |  | 1.50 |  | 1.50 |  |  | 1.50 |  |  |  |  |
Term Loan | Successor Credit Agreement | Total Leverage Ratio Less or Equal to 1.50 to 1.00 Greater Than 1.00 to 1.00 | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total Leverage Ratio |  | 1.00 |  | 1.00 |  |  | 1.00 |  |  |  |  |
Term Loan | Successor Credit Agreement | Total Leverage Ratio Less or Equal to 1.00 to 1.00 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Mandatory principal prepayment, percent of excess cash flow |  | 0.00% |  | 0.00% |  |  | 0.00% |  |  |  |  |
Total Leverage Ratio |  | 1.00 |  | 1.00 |  |  | 1.00 |  |  |  |  |
Term Loan | Successor Credit Agreement | Total Leverage Ration Less Or Equal 2.00 to 1.00 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total Leverage Ratio |  | 2.00 |  | 2.00 |  |  | 2.00 |  |  |  |  |
Term Loan | Successor Credit Agreement | Total Leverage Ratio Less or Equal 1.25 to 1.00 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total Leverage Ratio |  | 1.25 |  | 1.25 |  |  | 1.25 |  |  |  |  |
Dividend payment and stock purchase payment threshold |  | $ 25,000,000.0 |  | $ 25,000,000.0 |  |  | $ 25,000,000.0 |  |  |  |  |
Term Loan | Successor Credit Agreement | London Interbank Offered Rate (LIBOR) |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  | 2.75% |  |  |  |  |  |  |  |  |  |
Term Loan | Successor Credit Agreement | Effect of Plan |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  |  |  |  |  |  |  | $ 950,000,000.0 |
Term Loan | Senior Secured Term Loan due 2025, net of original issue discount |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Secured Debt |  | $ 950,000,000.0 |  | 950,000,000.0 |  |  | 950,000,000.0 |  |  |  |  |
Long-term debt |  | 394,000,000.0 |  | 394,000,000.0 |  | $ 395,900,000 | 394,000,000.0 |  |  |  |  |
Line of Credit | 2017 Revolver | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  | 350,000,000.0 |  | 350,000,000.0 |  |  | 350,000,000.0 |  |  |  |  |
Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  | $ 1,300,000 |  |  |  |  |  |  |  |  |
Revolving Credit Facility | 2017 Revolver |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt issuance cost |  | 4,700,000 |  | 4,700,000 |  |  | 4,700,000 |  |  |  |  |
Interest expense |  | 1,500,000 |  | 3,100,000 | $ 3,100,000 |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | 350,000,000.0 |  | $ 350,000,000.0 |  |  | $ 350,000,000.0 |  |  |  |  |
Unrestricted Cash Netting Limit |  | $ 800,000,000.0 |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility, Fee on Unused Borrowings |  | 0.50% |  | 0.50% |  |  | 0.50% |  |  |  |  |
Aggregate Letters of Credit, Maximum |  | $ 70,800,000 |  | $ 70,800,000 |  |  | $ 70,800,000 |  |  |  |  |
Revolving Credit Facility | 2017 Revolver | Total Leverage Ration Less Or Equal 2.00 to 1.00 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total Leverage Ratio |  | 2.00 |  | 2.00 |  |  | 2.00 |  |  |  |  |
Revolving Credit Facility | 2017 Revolver | London Interbank Offered Rate (LIBOR) |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 2.75% | 3.25% |  |  |  |  |  |  |  |  |  |
London Interbank Offered Rate (LIBOR) Floor | 1.00% |  |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility | Letter of Credit |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Base Interest Rate |  | 3.375% |  | 3.375% |  |  | 3.375% |  |  |  |  |

X
- Definition Amount represents the maximum face amount of all letters of credit issued under the L/C Facility and the Bonding L/C Facility without DIP Lender consent. + References No definition available. + Details
Name: | btu_AggregateLettersofCreditMaximum
Namespace Prefix: | btu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Aggregate consent payments + References No definition available. + Details
Name: | btu_Aggregateconsentpayments
Namespace Prefix: | btu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Debt Instrument, Base Interest Rate + References No definition available. + Details
Name: | btu_DebtInstrumentBaseInterestRate
Namespace Prefix: | btu_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Debt Instrument, Collateral, Capital Stock, Percent + References No definition available. + Details
Name: | btu_DebtInstrumentCollateralCapitalStockPercent
Namespace Prefix: | btu_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Debt Instrument, Collateral, Nonvoting Capital Stock, Percent + References No definition available. + Details
Name: | btu_DebtInstrumentCollateralNonvotingCapitalStockPercent
Namespace Prefix: | btu_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Debt Instrument, Collateral, Voting Capital Stock, Percent + References No definition available. + Details
Name: | btu_DebtInstrumentCollateralVotingCapitalStockPercent
Namespace Prefix: | btu_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Debt Instrument, Covenant, Dividend Payment And Stock Purchase Payment Threshold + References No definition available. + Details
Name: | btu_DebtInstrumentCovenantDividendPaymentAndStockPurchasePaymentThreshold
Namespace Prefix: | btu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Debt Instrument, Covenant, Excess Proceeds From Sales Of Assets, Threshold + References No definition available. + Details
Name: | btu_DebtInstrumentCovenantExcessProceedsFromSalesOfAssetsThreshold
Namespace Prefix: | btu_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Debt Instrument, Covenant, Fixed Charge Coverage Ratio + References No definition available. + Details
Name: | btu_DebtInstrumentCovenantFixedChargeCoverageRatio
Namespace Prefix: | btu_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt Instrument, Covenant, Leverage Ratio + References No definition available. + Details
Name: | btu_DebtInstrumentCovenantLeverageRatio
Namespace Prefix: | btu_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Debt Instrument, Mandatory Principal Prepayment, If Required, Period Payable, Threshold + References No definition available. + Details
Name: | btu_DebtInstrumentMandatoryPrincipalPrepaymentIfRequiredPeriodPayableThreshold
Namespace Prefix: | btu_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt Instrument, Principal Prepayment, Percent Of Excess Cash Flow + References No definition available. + Details
Name: | btu_DebtInstrumentMandatoryPrincipalPrepaymentPercentOfExcessCashFlow
Namespace Prefix: | btu_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Debt Instrument, Principal Prepayment, Percent of Principal Amount if Repaid Before October 2018 + References No definition available. + Details
Name: | btu_DebtInstrumentPrincipalPrepaymentPercentofPrincipalAmountifRepaidBeforeOctober2018
Namespace Prefix: | btu_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Debt Instrument, Restricted Payments, Amount Paid + References No definition available. + Details
Name: | btu_DebtInstrumentRestrictedPaymentsAmountPaid
Namespace Prefix: | btu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Debt Instrument, Restricted Payments Basket + References No definition available. + Details
Name: | btu_DebtInstrumentRestrictedPaymentsBasket
Namespace Prefix: | btu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Debt Instrument, Restricted Payments Basket, Annual Limit + References No definition available. + Details
Name: | btu_DebtInstrumentRestrictedPaymentsBasketAnnualLimit
Namespace Prefix: | btu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Debt Instrument, Restricted Payments, Principal Amount Used to Calculate Payments + References No definition available. + Details
Name: | btu_DebtInstrumentRestrictedPaymentsPrincipalAmountUsedtoCalculatePayments
Namespace Prefix: | btu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Debt Instrument, Restricted Payments Threshold + References No definition available. + Details
Name: | btu_DebtInstrumentRestrictedPaymentsThreshold
Namespace Prefix: | btu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition London Interbank Offered Rate (LIBOR) Floor + References No definition available. + Details
Name: | btu_LondonInterbankOfferedRateLIBORFloor
Namespace Prefix: | btu_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Subsidiaries + References No definition available. + Details
Name: | btu_NumberofSubsidiaries
Namespace Prefix: | btu_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Revolving Credit Facility, Fee on Unused Borrowings + References No definition available. + Details
Name: | btu_RevolvingCreditFacilityFeeonUnusedBorrowings
Namespace Prefix: | btu_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Unrestricted Cash Netting Limit + References No definition available. + Details
Name: | btu_UnrestrictedCashNettingLimit
Namespace Prefix: | btu_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage price of original principal amount of debt at which debt can be redeemed by the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph e -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 + Details
Name: | us-gaap_DebtInstrumentRedemptionPricePercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of unamortized debt discount (premium) and debt issuance costs. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399 + Details
Name: | us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399 + Details
Name: | us-gaap_DeferredFinanceCostsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of the cost of borrowed funds accounted for as interest expense. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (210.5-03(11)) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.9) -URI http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260 + Details
Name: | us-gaap_InterestExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of expense classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4,6) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.7) -URI http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263 + Details
Name: | us-gaap_OtherExpenses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of cash outflow for cost from early extinguishment and prepayment of debt. Includes, but is not limited to, third-party cost, premium paid, and other fee paid to lender directly for debt extinguishment or debt prepayment. Excludes accrued interest. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
Name: | us-gaap_PaymentsOfDebtExtinguishmentCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
Name: | us-gaap_RepaymentsOfDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of cash outflow for debt, mandatory redeemable security, and principal payment for finance lease obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
Name: | us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_SecuredDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_DebtInstrumentAxis=btu_SuccessorCreditAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=btu_A6.000SeniorSecuredNotesDue2022Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FreshStartAdjustmentsTypeOfFreshStartAdjustmentAxis=btu_EffectofReorganizationPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=btu_A6.375SeniorSecuredNotesDue2025Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=btu_A6.00And6.375PercentSeniorSecuredNotesSuccessorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_GeographicDistributionAxis=us-gaap_GeographicDistributionDomesticMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_GeographicDistributionAxis=us-gaap_GeographicDistributionForeignMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=btu_PeabodyInvestmentsGibraltarLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=btu_TermLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | btu_DebtCovenantTermsAxis=btu_TotalLeverageRatioLessOrEqualTo2.00To1.00GreaterThan1.50To1.00Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | btu_DebtCovenantTermsAxis=btu_TotalLeverageRatioLessOrEqualTo1.50To1.00GreaterThan1.00To1.00Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | btu_DebtCovenantTermsAxis=btu_TotalLeverageRatioLessOrEqualTo1.00To1.00Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | btu_DebtCovenantTermsAxis=btu_TotalLeverageRationLessOrEqual2.00to1.00Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | btu_DebtCovenantTermsAxis=btu_TotalLeverageRatioLessOrEqual1.25to1.00Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=btu_SeniorSecuredTermLoanDue2022Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=btu_A2017RevolverMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=us-gaap_LetterOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |