v2.4.1.9

Transactions with Affiliates (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Allocation of costs
General and administrative expense	$ 3.8us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty	$ 8.6us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty
Agreements
Term of agreement with Antero	20 years
Antero Midstream Partners LP
Allocation of costs
Direct labor expenses	$ 0.7us-gaap_CostOfServicesDirectLabor / dei_LegalEntityAxis = am_AnteroMidstreamPartnersLpMember	$ 0.2us-gaap_CostOfServicesDirectLabor / dei_LegalEntityAxis = am_AnteroMidstreamPartnersLpMember

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- Details

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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
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Period Type:	duration

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- Details

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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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Balance Type:	debit
Period Type:	duration

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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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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Details

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