XML 178 R154.htm IDEA: XBRL DOCUMENT v3.10.0.1

Segment and Geographic Information Revenues as a Percent of Total Revenues by Geographic Region (Details)	3 Months Ended	9 Months Ended	12 Months Ended
	Apr. 01, 2017	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2016
Successor
Revenues as a Percent of Total Revenues by Geographic Region [Line Items]
Segment Reporting, Revenue Percentage		100.00%	100.00%
Successor | U.S.
Revenues as a Percent of Total Revenues by Geographic Region [Line Items]
Segment Reporting, Revenue Percentage		48.90%	47.80%
Successor | Japan
Revenues as a Percent of Total Revenues by Geographic Region [Line Items]
Segment Reporting, Revenue Percentage		11.70%	10.10%
Successor | Taiwan
Revenues as a Percent of Total Revenues by Geographic Region [Line Items]
Segment Reporting, Revenue Percentage		8.70%	8.10%
Successor | Australia
Revenues as a Percent of Total Revenues by Geographic Region [Line Items]
Segment Reporting, Revenue Percentage		5.30%	6.60%
Successor | India
Revenues as a Percent of Total Revenues by Geographic Region [Line Items]
Segment Reporting, Revenue Percentage		6.70%	6.20%
Successor | China
Revenues as a Percent of Total Revenues by Geographic Region [Line Items]
Segment Reporting, Revenue Percentage		7.50%	5.90%
Successor | South Korea
Revenues as a Percent of Total Revenues by Geographic Region [Line Items]
Segment Reporting, Revenue Percentage		1.10%	3.10%
Successor | Other
Revenues as a Percent of Total Revenues by Geographic Region [Line Items]
Segment Reporting, Revenue Percentage		10.10%	12.20%
Predecessor
Revenues as a Percent of Total Revenues by Geographic Region [Line Items]
Segment Reporting, Revenue Percentage	100.00%			100.00%
Predecessor | U.S.
Revenues as a Percent of Total Revenues by Geographic Region [Line Items]
Segment Reporting, Revenue Percentage	55.20%			54.70%
Predecessor | Japan
Revenues as a Percent of Total Revenues by Geographic Region [Line Items]
Segment Reporting, Revenue Percentage	11.40%			6.90%
Predecessor | Taiwan
Revenues as a Percent of Total Revenues by Geographic Region [Line Items]
Segment Reporting, Revenue Percentage	5.70%			4.60%
Predecessor | Australia
Revenues as a Percent of Total Revenues by Geographic Region [Line Items]
Segment Reporting, Revenue Percentage	4.20%			4.20%
Predecessor | India
Revenues as a Percent of Total Revenues by Geographic Region [Line Items]
Segment Reporting, Revenue Percentage	2.70%			3.00%
Predecessor | China
Revenues as a Percent of Total Revenues by Geographic Region [Line Items]
Segment Reporting, Revenue Percentage	5.60%			5.40%
Predecessor | South Korea
Revenues as a Percent of Total Revenues by Geographic Region [Line Items]
Segment Reporting, Revenue Percentage	0.50%			1.50%
Predecessor | Other
Revenues as a Percent of Total Revenues by Geographic Region [Line Items]
Segment Reporting, Revenue Percentage	14.70%			19.70%

X

- Definition

[Line Items] for Revenues as a Percent of Total Revenues by Geographic Region [Table]

+ References

No definition available.

+ Details

Name:	btu_RevenuesasaPercentofTotalRevenuesbyGeographicRegionLineItems
Namespace Prefix:	btu_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Segment Reporting, Revenue Percentage

+ References

No definition available.

+ Details

Name:	btu_SegmentReportingRevenuePercentage
Namespace Prefix:	btu_
Data Type:	num:percentItemType
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_StatementGeographicalAxis=country_US
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_JP
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=btu_TAIWANDomain
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_AU
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_IN
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_CN
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_KP
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=us-gaap_AllOtherSegmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_PredecessorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: