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Subsequent Event (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	6 Months Ended
	Jul. 31, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Jul. 10, 2015
Venezuela
Subsequent Event
Installment payments, including an annual charge, received from sale of expropriated assets		$ 18.1	$ 18.7	$ 35.9
Subsequent events | Venezuela
Subsequent Event
Installment payments, including an annual charge, received from sale of expropriated assets	$ 18.9
Line of Credit | Subsequent events | Archrock Credit Facility
Subsequent Event
Aggregate amount to be made available upon satisfaction of certain conditions					$ 300.0
Outstanding borrowings					0.0
Line of Credit | Subsequent events | Exterran Corporation Credit Agreement
Subsequent Event
Aggregate amount to be made available upon satisfaction of certain conditions					750.0
Outstanding borrowings					$ 0.0

X

- Definition

Maximum amount of borrowing capacity to be made available under the credit facility upon satisfaction of certain conditions.

+ References

No definition available.

+ Details

Name:	exh_LineOfCreditFacilityBorrowingCapacityUponSatisfactionOfConditions
Namespace Prefix:	exh_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The cash inflows received as installment payments from the sale of expropriated assets.

+ References

No definition available.

+ Details

Name:	exh_ProceedsFromSaleOfExpropriatedAssetsInstallmentPayment
Namespace Prefix:	exh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: 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



Reference 2: 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)



-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910



Reference 3: http://www.xbrl.org/2003/role/presentationRef



-Publisher SEC



-Name Regulation S-X (SX)



-Number 210



-Section 02



-Paragraph 19, 20, 22



-Article 5

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=exh_VenezuelaOperationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=exh_ArchrockCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=exh_ExterranCorporationCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: