v2.4.1.9

Transactions with Affiliates (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allocation of costs
General and administrative expense	$ 22.0us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty	$ 23.1us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty	$ 2.9us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty
Antero
Agreements
Term of agreement with Antero	20 years
Low pressure gathering fee	0.30am_GatheringAndCompressionAgreementLowPressureGatheringFeeSubjectToCpiBasedAdjustments / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = am_AnteroResourcesCorporationMember
High pressure gathering fee	0.18am_GatheringAndCompressionAgreementHighPressureGatheringFeeSubjectToCpiBasedAdjustments / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = am_AnteroResourcesCorporationMember
Compression fee	0.18am_GatheringAndCompressionAgreementCompressionFeeSubjectToCpiBasedAdjustments / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = am_AnteroResourcesCorporationMember
Condensate gathering fee	4.00am_GatheringAndCompressionAgreementCondensateGatheringFeeSubjectToCpiBasedAdjustments / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = am_AnteroResourcesCorporationMember
Antero | High Pressure Lines (Member)
Agreements
Minimum volume commitment that require Antero to pay	75.00%am_GatheringAndCompressionAgreementMinimumVolumeCommitmentThatRequireAnteroToPay / us-gaap_PropertyPlantAndEquipmentByTypeAxis = am_HighPressureLinesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = am_AnteroResourcesCorporationMember
Antero | Compressor stations (Member)
Agreements
Minimum volume commitment that require Antero to pay	70.00%am_GatheringAndCompressionAgreementMinimumVolumeCommitmentThatRequireAnteroToPay / us-gaap_PropertyPlantAndEquipmentByTypeAxis = am_CompressorStationsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = am_AnteroResourcesCorporationMember
Antero Midstream Partners LP
Allocation of costs
Direct labor expenses	$ 1.5us-gaap_CostOfServicesDirectLabor / dei_LegalEntityAxis = am_AnteroMidstreamPartnersLpMember

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- Details

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- Definition

Represents the term of agreement with Antero, pursuant to which gathering and compression services are to be provided.

+ References

No definition available.

+ Details

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- Details

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- Definition

Represents the receipt of compression fee received per Mcf by gathering and compression agreement, subject to CPI based adjustments.

+ References

No definition available.

+ Details

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- Definition

Represents the receipt of codensate gathering fee received per Bbl by gathering and compression agreement, subject to CPI based adjustments.

+ References

No definition available.

+ Details

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- Definition

Represents the receipt of high pressure gathering fee received per Mcf by gathering and compression agreement, subject to CPI based adjustments.

+ References

No definition available.

+ Details

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- Definition

Represents the receipt of low pressure gathering fee received per Mcf by gathering and compression agreement, subject to CPI based adjustments.

+ References

No definition available.

+ Details

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Namespace Prefix:	am_
Data Type:	us-types:perUnitItemType
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X

- Definition

Represents the minimum volume commitments that require Antero to utilize or pay certain percentage of the capacity of such new construction.

+ References

No definition available.

+ Details

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Namespace Prefix:	am_
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- Definition

Payroll costs incurred (including equity-based compensation) that are directly related to services rendered by an entity during the reporting period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.2(d))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

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- Definition

Amount of selling, general and administrative expenses resulting from transactions, excluding transactions that are eliminated in consolidated or combined financial statements, with related party.

+ References

No definition available.

+ Details

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- Details

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- Details

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