XML 85 R71.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Intangible Contract Assets and Liabilities - Balances and Balance Sheet Classifications (Details) - Successor - Fresh Start Reporting $ in Millions | Jun. 30, 2017 USD ($)
--- | ---
Fresh-Start Adjustment [Line Items] |
Assets | $ 279.7
Liabilities | (159.9)
Net Total | 119.8
Coal supply agreements |
Fresh-Start Adjustment [Line Items] |
Assets | 279.7
Net Total | 226.5
Take-Or-Pay Contracts |
Fresh-Start Adjustment [Line Items] |
Liabilities | (106.7)
Coal supply agreements |
Fresh-Start Adjustment [Line Items] |
Liabilities | (53.2)
Investments and other assets |
Fresh-Start Adjustment [Line Items] |
Assets | 279.7
Net Total | 279.7
Accounts payable and accrued expenses |
Fresh-Start Adjustment [Line Items] |
Liabilities | (30.6)
Other noncurrent liabilities |
Fresh-Start Adjustment [Line Items] |
Liabilities | $ (129.3)

X
- Definition Finite Lived Intangible Liabilities + References No definition available. + Details
Name: | btu_FiniteLivedIntangibleLiabilities
Namespace Prefix: | btu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_FreshStartAdjustmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementScenarioAxis=us-gaap_SuccessorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CoalSupplyAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | btu_FiniteLivedIntangibleLiabilityByMajorClassAxis=btu_TakeOrPayContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | btu_FiniteLivedIntangibleLiabilityByMajorClassAxis=us-gaap_CoalSupplyAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=btu_InvestmentsAndOtherAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_AccountsPayableAndAccruedLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_OtherNoncurrentLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |