XML 68 R136.htm IDEA: XBRL DOCUMENT v2.4.1.9
Supplemental Guarantor/Non-Guarantor Financial Information (Details Textuals)
 12 Months Ended
Dec. 31, 2014
Guarantor/Non-Guarantor [Line Items]  
Percent of ownership of certain U.S. subsidiaries that fully and unconditionally guarantee the Senior Notes 100.00%btu_PercentofownershipofcertainU.S.subsidiariesthatfullyandunconditionallyguaranteetheSeniorNotes
7.375% Senior Notes Member  
Guarantor/Non-Guarantor [Line Items]  
Stated interest rate - percentage 7.375%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= btu_A7.375SeniorNotesDue2016Domain
6.00% Senior Notes [Member]  
Guarantor/Non-Guarantor [Line Items]  
Stated interest rate - percentage 6.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= btu_A6.00SeniorNotesDue2018Domain
6.50% Senior Notes [Member]  
Guarantor/Non-Guarantor [Line Items]  
Stated interest rate - percentage 6.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= btu_A6.50SeniorNotesDue2020Domain
6.25% Senior Notes [Member]  
Guarantor/Non-Guarantor [Line Items]  
Stated interest rate - percentage 6.25%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= btu_A6.25SeniorNotesDue2021Domain
7.875% Senior Notes [Member]  
Guarantor/Non-Guarantor [Line Items]  
Stated interest rate - percentage 7.875%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= btu_A7.875SeniorNotesDue2026Domain