XML 145 R132.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Commitments and Contingencies (Details 1) T in Millions, AUD in Millions | 3 Months Ended | 12 Months Ended | 264 Months Ended | 336 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2012 USD ($) | Jun. 30, 2012 USD ($) T | Sep. 30, 2011 USD ($) T | Dec. 31, 2016 USD ($) | Dec. 31, 2016 AUD | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($) | Dec. 31, 2011 USD ($) | Dec. 31, 2032 yr | Dec. 31, 2042 | Dec. 31, 2016 AUD | Oct. 07, 2016 USD ($) | Sep. 30, 2016 USD ($) | Sep. 30, 2016 AUD | Jul. 31, 2011 USD ($) T
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  | $ 287,000,000 |  |  |
Take-or-pay Arrangement Terms Years (Maximum) |  |  |  |  |  |  |  |  |  |  | 26 |  |  |  |  |
Take-or-pay obligations |  |  |  | $ 1,596,900,000 |  |  |  |  |  |  |  |  |  |  |  |
Take-or-pay Obligations Due In One Year |  |  |  | 209,900,000 |  |  |  |  |  |  |  |  |  |  |  |
Leased coal reserves adjacent to NARM | T |  | 1,100 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average bid price per mineable ton |  | 1.10 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual payments on coal reserves 2013 to 2016 |  |  |  | 247,900,000 |  | $ 247,900,000 | $ 247,900,000 |  |  |  |  |  |  |  |  |
Number Of Tons Of Coal In Which Company Was Named Winning Bidder Adjacent to Caballo | T |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 220
Bid Price Per Mineable Ton |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.95
Annual Coal Reserve Payments Pursuant To Belle Ayr North Lease |  |  |  |  |  | 42,100,000 | 42,100,000 | $ 42,100,000 | $ 42,100,000 |  |  |  |  |  |  |
Number Of Tons Of Coal In Which Company Was Named Winning Bidder In The Powder River Basin | T |  |  | 130 |  |  |  |  |  |  |  |  |  |  |  |  |
Bid Price Per Mineable Ton In The Powder River Basin |  |  | 1.10 |  |  |  |  |  |  |  |  |  |  |  |  |
Annual Coal Reserve Payments Pursuant To Caballo West Lease |  |  |  |  |  | 28,600,000 | 28,600,000 | 28,600,000 | 28,600,000 |  |  |  |  |  |  |
Reimbursement for the difference in the federal coal lease payments made in 2011 | $ 13,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
number of annual true up payments | 5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual true up payments for the excess of the $1.10 bid price versus $0.95 under the transferred lease |  |  |  |  |  | $ 3,900,000 | 3,900,000 | $ 3,900,000 | $ 3,900,000 |  |  |  |  |  |  |
Federal Coal Lease Term Years | yr |  |  |  |  |  |  |  |  |  | 20 |  |  |  |  |  |
Capital Additions [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase commitments for capital expenditures |  |  |  | 7,400,000 |  |  |  |  |  |  |  |  |  |  |  |
Berenergy [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Litigation Settlement Damages Awarded to Plaintiff |  |  |  | 900,000 |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingency Accrual |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 13,100,000 |  |
Monto Coal Pty Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingency, Damages Sought, Value | AUD |  |  |  |  | AUD 15.6 |  |  |  |  |  |  |  |  |  |  |
Eagle Mining [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingency Accrual |  |  |  |  |  |  | $ 23,400,000 |  |  |  |  |  |  |  |  |
Wilkie Creek [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingency, Damages Sought, Value | AUD |  |  |  |  | AUD 113.1 |  |  |  |  |  |  |  |  |  |  |
Settlement charges total |  |  |  | $ 9,900,000 |  |  |  |  |  |  |  | AUD 13.0 |  |  | AUD 13.0 |

X
- Definition Annual Coal Reserve Payments Pursuant To Belle Ayr North Lease + References No definition available. + Details
Name: | btu_AnnualCoalReservePaymentsPursuantToBelleAyrNorthLease
Namespace Prefix: | btu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Annual Coal Reserve Payments Pursuant To Caballo West Lease + References No definition available. + Details
Name: | btu_AnnualCoalReservePaymentsPursuantToCaballoWestLease
Namespace Prefix: | btu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Annual true up payments for the excess of the $1.10 bid price versus $0.95 under the transferred lease + References No definition available. + Details
Name: | btu_AnnualTrueUpPaymentsForExcessOf110BidPriceVersus095UnderTransferredLease
Namespace Prefix: | btu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Annualpaymentsoncoalreserves2012to2016 + References No definition available. + Details
Name: | btu_Annualpaymentsoncoalreserves2012To2016
Namespace Prefix: | btu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Bid Price Per Mineable Ton + References No definition available. + Details
Name: | btu_BidPricePerMineableTon
Namespace Prefix: | btu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Bid Price Per Mineable Ton In The Powder River Basin + References No definition available. + Details
Name: | btu_BidPricePerMineableTonInPowderRiverBasin
Namespace Prefix: | btu_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition Federal coal leases executed with the BLM described above expire after a 20-year initial term, unless at such time there isongoing production on the subject leases or within an active logical mining unit of which they are part. + References No definition available. + Details
Name: | btu_FederalCoalLeaseTerm
Namespace Prefix: | btu_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition LeasedcoalreservesadjacenttoNARM + References No definition available. + Details
Name: | btu_Leasedcoalreservesadjacenttonarm
Namespace Prefix: | btu_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Litigation Settlement Damages Awarded to Plaintiff + References No definition available. + Details
Name: | btu_LitigationSettlementDamagesAwardedToPlaintiff
Namespace Prefix: | btu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition number of annual true up payments + References No definition available. + Details
Name: | btu_NumberOfAnnualTrueUpPayments
Namespace Prefix: | btu_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number Of Tons Of Coal In Which Company Was Named Winning Bidder Adjacent to Caballo + References No definition available. + Details
Name: | btu_NumberOfTonsOfCoalInWhichCompanyWasNamedWinningBidderAdjacentToCaballo
Namespace Prefix: | btu_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number Of Tons Of Coal In Which Company Was Named Winning Bidder In The Powder River Basin + References No definition available. + Details
Name: | btu_NumberOfTonsOfCoalInWhichCompanyWasNamedWinningBidderInPowderRiverBasin
Namespace Prefix: | btu_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition Reimbursement for the difference in the federal coal lease payments made in 2011 + References No definition available. + Details
Name: | btu_ReimbursementForDifferenceInFederalCoalLeasePaymentsMadeIn2011
Namespace Prefix: | btu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Total settlement charges recognized. + References No definition available. + Details
Name: | btu_Settlementchargestotal
Namespace Prefix: | btu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the estimated contractual cash spend in the next twelve months after the balance sheet date related to various short term take or pay arrangements in the U.S. and Australia associated with rail and port commitments for the delivery of coal including amounts relating to export facilities. + References No definition available. + Details
Name: | btu_TakeOrPayObligationsDueInOneYear
Namespace Prefix: | btu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the total projected cash contractual obligation spend associated with various long and short term take or pay arrangements in the U.S. and Australia for rail and port commitments for the delivery of coal including amounts relating to export facilities. + References No definition available. + Details
Name: | btu_TakeOrPayObligationsTotal
Namespace Prefix: | btu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition TakeOrPayArrangementTerms + References No definition available. + Details
Name: | btu_Takeorpayarrangementterms
Namespace Prefix: | btu_
Data Type: | us-types:durationStringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weightedaveragebidpricepermineableton + References No definition available. + Details
Name: | btu_Weightedaveragebidpricepermineableton
Namespace Prefix: | btu_
Data Type: | xbrli:decimalItemType
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_LongTermPurchaseCommitmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 + Details
Name: | us-gaap_LossContingencyAccrualAtCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The value (monetary amount) of the award the plaintiff seeks in the legal matter. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14557-108349 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349 + Details
Name: | us-gaap_LossContingencyDamagesSoughtValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16(a)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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_SeniorNotes
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of the unrecorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77896938&loc=d3e25336-109308 + Details
Name: | us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=us-gaap_CapitalAdditionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=btu_BerenergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=btu_MontoCoalPtyLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=btu_EagleMiningMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=btu_WilkieCreekMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |