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 | $ 22.0 us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty | $ 23.1 us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty | $ 2.9 us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty
Antero |  |  |
Agreements |  |  |
Term of agreement with Antero | 20 years |  |
Low pressure gathering fee | 0.30 am_GatheringAndCompressionAgreementLowPressureGatheringFeeSubjectToCpiBasedAdjustments / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = am_AnteroResourcesCorporationMember |  |
High pressure gathering fee | 0.18 am_GatheringAndCompressionAgreementHighPressureGatheringFeeSubjectToCpiBasedAdjustments / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = am_AnteroResourcesCorporationMember |  |
Compression fee | 0.18 am_GatheringAndCompressionAgreementCompressionFeeSubjectToCpiBasedAdjustments / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = am_AnteroResourcesCorporationMember |  |
Condensate gathering fee | 4.00 am_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 | $ 1.5 us-gaap_CostOfServicesDirectLabor / dei_LegalEntityAxis = am_AnteroMidstreamPartnersLpMember |  |

X
- Details
Name: | am_Agreements
Namespace Prefix: | am_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the term of agreement with Antero, pursuant to which gathering and compression services are to be provided. + References No definition available. + Details
Name: | am_AgreementTermWithRelatedParty
Namespace Prefix: | am_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | am_AllocationOfCosts
Namespace Prefix: | am_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | am_GatheringAndCompressionAgreementCompressionFeeSubjectToCpiBasedAdjustments
Namespace Prefix: | am_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | am_GatheringAndCompressionAgreementCondensateGatheringFeeSubjectToCpiBasedAdjustments
Namespace Prefix: | am_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | am_GatheringAndCompressionAgreementHighPressureGatheringFeeSubjectToCpiBasedAdjustments
Namespace Prefix: | am_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | am_GatheringAndCompressionAgreementLowPressureGatheringFeeSubjectToCpiBasedAdjustments
Namespace Prefix: | am_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | duration

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
Name: | am_GatheringAndCompressionAgreementMinimumVolumeCommitmentThatRequireAnteroToPay
Namespace Prefix: | am_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_CostOfServicesDirectLabor
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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
Name: | us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=am_AnteroMidstreamPartnersLpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=am_AnteroResourcesCorporationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |