v2.4.1.9

Organization (Details) (USD $)	0 Months Ended	12 Months Ended
	Nov. 10, 2014	Dec. 31, 2014
IPO [Member]
Organization
Units issued	46,000,000us-gaap_PartnersCapitalAccountUnitsSoldInPublicOffering / us-gaap_TransactionTypeAxis = us-gaap_IPOMember
Price per common unit of limited partnership	$ 25.00am_SaleOfLimitedPartnershipInterestsPricePerUnit / us-gaap_TransactionTypeAxis = us-gaap_IPOMember
Net proceeds received from shares of common stock sold	$ 1,100,000,000us-gaap_ProceedsFromIssuanceOfCommonStock / us-gaap_TransactionTypeAxis = us-gaap_IPOMember
Common units redeemed	6,000,000us-gaap_PartnersCapitalAccountUnitsRedeemed / us-gaap_TransactionTypeAxis = us-gaap_IPOMember
Net proceeds retained	250,000,000am_ProceedsFromIssuanceOfSharesRetained / us-gaap_TransactionTypeAxis = us-gaap_IPOMember
Common Unitholders Public [Member]
Organization
Common unitholders units outstanding		46,000,000us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding / us-gaap_StatementClassOfStockAxis = am_CommonUnitholdersPublicMember
Common Unitholders Public [Member] | IPO [Member]
Organization
Ownership percentage (as a percent)		30.30%am_OwnershipPercentage / us-gaap_StatementClassOfStockAxis = am_CommonUnitholdersPublicMember / us-gaap_TransactionTypeAxis = us-gaap_IPOMember
Common unitholders units outstanding		46,000,000us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding / us-gaap_StatementClassOfStockAxis = am_CommonUnitholdersPublicMember / us-gaap_TransactionTypeAxis = us-gaap_IPOMember
Common Unitholders Antero [Member]
Organization
Common unitholders units outstanding		29,940,957us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding / us-gaap_StatementClassOfStockAxis = am_CommonUnitholdersAnteroMember
Subordinated Unitholder Antero [Member]
Organization
Common unitholders units outstanding		75,940,957us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding / us-gaap_StatementClassOfStockAxis = am_SubordinatedUnitholderAnteroMember
Antero
Organization
Term of agreement with Antero		20 years
Antero | IPO [Member]
Organization
Debt repaid using the proceeds of IPO	$ 843,000,000am_CashOutflowToParentToRepayIndebtednessAndToReimburse / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = am_AnteroResourcesCorporationMember / us-gaap_TransactionTypeAxis = us-gaap_IPOMember
Antero | Antero Midstream Partners LP
Organization
Ownership percentage (as a percent)		69.70%am_OwnershipPercentage / dei_LegalEntityAxis = am_AnteroMidstreamPartnersLpMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = am_AnteroResourcesCorporationMember

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

- Definition

The cash outflow to repay indebtedness assumed from the parent and to reimburse the parent for certain capital expenditures incurred.

+ References

No definition available.

+ Details

Name:	am_CashOutflowToParentToRepayIndebtednessAndToReimburse
Namespace Prefix:	am_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	am_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems
Namespace Prefix:	am_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The percentage of the entity’s units owned.

+ References

No definition available.

+ Details

Name:	am_OwnershipPercentage
Namespace Prefix:	am_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The cash inflow associated with the amount received from entity's first offering of stock to the public which is retained for general partnership purposes.

+ References

No definition available.

+ Details

Name:	am_ProceedsFromIssuanceOfSharesRetained
Namespace Prefix:	am_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Per unit amount received by partnership for each unit of limited partnership common interests issued or sold.

+ References

No definition available.

+ Details

Name:	am_SaleOfLimitedPartnershipInterestsPricePerUnit
Namespace Prefix:	am_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The number of limited partner units outstanding.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 272

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 5

-Subparagraph (SAB TOPIC 4.F)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 4

-Section F

+ Details

Name:	us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The number of units redeemed during the year of each class of partners' capital account. Units represent shares of ownership of the general, limited, and preferred partners.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 5

-Subparagraph (SAB TOPIC 4.F)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 16

-Subparagraph a, b

-Article 6

+ Details

Name:	us-gaap_PartnersCapitalAccountUnitsRedeemed
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The number of units sold in a public offering of each class of partners' capital account. Units represent shares of ownership of the general, limited, and preferred partners.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 5

-Subparagraph (SAB TOPIC 4.F)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 16

-Subparagraph a, b

-Article 6

+ Details

Name:	us-gaap_PartnersCapitalAccountUnitsSoldInPublicOffering
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The cash inflow from the additional capital contribution to the entity.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfCommonStock
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

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

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=am_CommonUnitholdersAnteroMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=am_CommonUnitholdersPublicMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=am_SubordinatedUnitholderAnteroMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_TransactionTypeAxis=us-gaap_IPOMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: