v2.4.1.9

Consolidated Balance Sheets (Parenthetical)	Mar. 31, 2015	Dec. 31, 2014
Common Unitholders Public [Member]
Common unitholders units issued	(46,000,000)us-gaap_LimitedPartnersCapitalAccountUnitsIssued / us-gaap_StatementClassOfStockAxis = am_CommonUnitholdersPublicMember	(46,000,000)us-gaap_LimitedPartnersCapitalAccountUnitsIssued / us-gaap_StatementClassOfStockAxis = am_CommonUnitholdersPublicMember
Common unitholders units outstanding	46,000,000us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding / us-gaap_StatementClassOfStockAxis = am_CommonUnitholdersPublicMember	46,000,000us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding / us-gaap_StatementClassOfStockAxis = am_CommonUnitholdersPublicMember
Common Unitholders Antero [Member]
Common unitholders units issued	(29,940,957)us-gaap_LimitedPartnersCapitalAccountUnitsIssued / us-gaap_StatementClassOfStockAxis = am_CommonUnitholdersAnteroMember	(29,940,957)us-gaap_LimitedPartnersCapitalAccountUnitsIssued / us-gaap_StatementClassOfStockAxis = am_CommonUnitholdersAnteroMember
Common unitholders units outstanding	29,940,957us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding / us-gaap_StatementClassOfStockAxis = am_CommonUnitholdersAnteroMember	29,940,957us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding / us-gaap_StatementClassOfStockAxis = am_CommonUnitholdersAnteroMember
Subordinated Unitholder Antero [Member]
Common unitholders units issued	(75,940,957)us-gaap_LimitedPartnersCapitalAccountUnitsIssued / us-gaap_StatementClassOfStockAxis = am_SubordinatedUnitholderAnteroMember	(75,940,957)us-gaap_LimitedPartnersCapitalAccountUnitsIssued / us-gaap_StatementClassOfStockAxis = am_SubordinatedUnitholderAnteroMember
Common unitholders units outstanding	75,940,957us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding / us-gaap_StatementClassOfStockAxis = am_SubordinatedUnitholderAnteroMember	75,940,957us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding / us-gaap_StatementClassOfStockAxis = am_SubordinatedUnitholderAnteroMember

X

- Definition

The number of limited partner units issued.

+ 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_LimitedPartnersCapitalAccountUnitsIssued
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

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

- 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: