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Accounting for Derivatives (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Fair Value Asset (Liability) |  |
Interest income recorded due to ineffectiveness related to interest rate swaps | $ 0.3 us-gaap_GainLossOnCashFlowHedgeIneffectivenessNet | $ 0 us-gaap_GainLossOnCashFlowHedgeIneffectivenessNet
Deferred pre-tax losses to be reclassified during next 12 months | 5.8 us-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 | 100.0 exh_DerivativeNotionalAmountContractEnteredDuringPeriod / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember / dei_LegalEntityAxis = exh_ExterranPartnersLPMember |
Notional amount of interest rate swaps | 500.0 invest_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 | 300.0 invest_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 | 100.0 invest_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 | $ 100.0 invest_DerivativeNotionalAmount / exh_DerivativeExpirationPeriodAxis = exh_DerivativeExpiringInMay2020Member / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember / dei_LegalEntityAxis = exh_ExterranPartnersLPMember |

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- Definition Aggregate notional amount specified by the derivative(s) entered into during the period. Expressed as an absolute value. + References No definition available. + Details
Name: | exh_DerivativeNotionalAmountContractEnteredDuringPeriod
Namespace Prefix: | exh_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

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- 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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Balance Type: | na
Period Type: | instant

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- Definition Fixed interest rate related to the interest rate derivative. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
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- 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 + Details
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Period Type: | duration

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- 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 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | credit
Period Type: | instant

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- Details
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Balance Type: |
Period Type: |