v3.3.0.814

Condensed Combined Consolidated Balance Sheets (Parenthetical)	Sep. 30, 2015 shares
Subordinated unitholder units issued	75,940,957
Subordinated unitholder units outstanding	75,940,957
Common Unitholders Public
Common unitholders units issued	58,922,054
Common unitholders units outstanding	58,922,054
Common Unitholder Antero
Common unitholders units issued	40,929,378
Common unitholders units outstanding	40,929,378

X

- Definition

Represents the total number of subordinated units that have been sold or granted.

+ References

No definition available.

+ Details

Name:	am_SubordinatedUnitholderCapitalAccountUnitsIssued
Namespace Prefix:	am_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The number of subordinated units outstanding.

+ References

No definition available.

+ Details

Name:	am_SubordinatedUnitholdersCapitalAccountUnitsOutstanding
Namespace Prefix:	am_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

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 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 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 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 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 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 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_CommonUnitholdersPublicMember
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: