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Property, Plant and Equipment, net (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, plant and equipment, net
Property, plant and equipment, gross	$ 5,617,186,000us-gaap_PropertyPlantAndEquipmentGross	$ 4,971,250,000us-gaap_PropertyPlantAndEquipmentGross
Accumulated depreciation	(2,290,294,000)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	(2,150,978,000)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Property, plant and equipment, net	3,326,892,000us-gaap_PropertyPlantAndEquipmentNet	2,820,272,000us-gaap_PropertyPlantAndEquipmentNet	2,838,719,000us-gaap_PropertyPlantAndEquipmentNet
Depreciation expense	367,300,000us-gaap_Depreciation	312,400,000us-gaap_Depreciation	328,100,000us-gaap_Depreciation
Assets under construction	153,300,000us-gaap_ConstructionInProgressGross	130,500,000us-gaap_ConstructionInProgressGross
Capitalized interest related to construction	200,000us-gaap_InterestCostsCapitalized	300,000us-gaap_InterestCostsCapitalized	1,200,000us-gaap_InterestCostsCapitalized
Compression equipment, facilities and other fleet assets
Property, plant and equipment, net
Property, plant and equipment, gross	4,916,576,000us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = exh_CompressionEquipmentFacilitiesAndOtherFleetAssetsMember	4,304,019,000us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = exh_CompressionEquipmentFacilitiesAndOtherFleetAssetsMember
Land and buildings
Property, plant and equipment, net
Property, plant and equipment, gross	206,257,000us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_LandAndBuildingMember	197,778,000us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_LandAndBuildingMember
Transportation and shop equipment
Property, plant and equipment, net
Property, plant and equipment, gross	297,239,000us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = exh_TransportationAndShopEquipmentMember	288,042,000us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = exh_TransportationAndShopEquipmentMember
Other.
Property, plant and equipment, net
Property, plant and equipment, gross	$ 197,114,000us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_PropertyPlantAndEquipmentOtherTypesMember	$ 181,411,000us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_PropertyPlantAndEquipmentOtherTypesMember

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

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-Section S99

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-Publisher SEC

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- Definition

Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

+ References

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-Publisher FASB

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+ References

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

-Publisher FASB

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Allowance for Funds Used during Construction

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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