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Accounting for Derivatives (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Fair Value Asset (Liability)
Interest income recorded due to ineffectiveness related to interest rate swaps	$ 0.3us-gaap_GainLossOnCashFlowHedgeIneffectivenessNet	$ 0us-gaap_GainLossOnCashFlowHedgeIneffectivenessNet
Deferred pre-tax losses to be reclassified during next 12 months	5.8us-gaap_InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNet
Designated as a hedging instrument | Interest rate hedges | Exterran Partners, L.P.
Fair Value Asset (Liability)
Notional value of interest rate swaps entered into during the period	100.0exh_DerivativeNotionalAmountContractEnteredDuringPeriod / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember / dei_LegalEntityAxis = exh_ExterranPartnersLPMember
Notional amount of interest rate swaps	500.0invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember / dei_LegalEntityAxis = exh_ExterranPartnersLPMember
Weighted average effective fixed interest rate on interest rate swaps (as a percent)	1.60%us-gaap_DerivativeFixedInterestRate / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember / dei_LegalEntityAxis = exh_ExterranPartnersLPMember
Designated as a hedging instrument | Interest rate hedges | Derivative expiring in 2018 | Exterran Partners, L.P.
Fair Value Asset (Liability)
Notional amount of interest rate swaps	300.0invest_DerivativeNotionalAmount / exh_DerivativeExpirationPeriodAxis = exh_DerivativeExpiringInMay2018Member / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember / dei_LegalEntityAxis = exh_ExterranPartnersLPMember
Designated as a hedging instrument | Interest rate hedges | Derivative expiring in 2019 | Exterran Partners, L.P.
Fair Value Asset (Liability)
Notional amount of interest rate swaps	100.0invest_DerivativeNotionalAmount / exh_DerivativeExpirationPeriodAxis = exh_DerivativeExpiringInMay2019Member / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember / dei_LegalEntityAxis = exh_ExterranPartnersLPMember
Designated as a hedging instrument | Interest rate hedges | Derivative expiring in 2020 | Exterran Partners, L.P.
Fair Value Asset (Liability)
Notional amount of interest rate swaps	$ 100.0invest_DerivativeNotionalAmount / exh_DerivativeExpirationPeriodAxis = exh_DerivativeExpiringInMay2020Member / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember / dei_LegalEntityAxis = exh_ExterranPartnersLPMember

X

- Definition

Aggregate notional amount specified by the derivative(s) entered into during the period. Expressed as an absolute value.

+ References

No definition available.

+ Details

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X

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

+ Details

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X

- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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- Details

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X

- Definition

The net gain (loss) recognized in earnings during the reporting period representing the amount of the cash flow hedges' ineffectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (d)(1)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959

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X

- Definition

The estimated net amount of unrealized gains or losses on interest rate cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994

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