Represents the term of agreement with Antero, pursuant to which gathering and compression services are to be provided.

No definition available.

Name:	amgp_AgreementTermWithRelatedParty
Namespace Prefix:	amgp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents information related to agreements.

+ References

No definition available.

+ Details

Name:	amgp_Agreements
Namespace Prefix:	amgp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the minimum volume commitments that require Antero to utilize or pay certain percentage of the capacity of such new construction of compressor stations.

+ References

No definition available.

+ Details

Name:	amgp_GatheringAndCompressionAgreementMinimumVolumeCommitmentThatRequireAnteroToPayForCompressorStations
Namespace Prefix:	amgp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the minimum volume commitments that require Antero to utilize or pay certain percentage of the capacity of such new construction for high pressure lines.

+ References

No definition available.

+ Details

Name:	amgp_GatheringAndCompressionAgreementMinimumVolumeCommitmentThatRequireAnteroToPayForHighPressureLines
Namespace Prefix:	amgp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The period prior to which notice to be served for the termination of the contract.

+ References

No definition available.

+ Details

Name:	amgp_MinimumNoticePeriodForTerminationOfContract
Namespace Prefix:	amgp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of minimum volume commitments and other fees.

+ References

No definition available.

+ Details

Name:	amgp_MinimumVolumeCommitmentsAndOtherFees
Namespace Prefix:	amgp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The threshold delivery of volume commitments for receiving minimum volume fee.

+ References

No definition available.

+ Details

Name:	amgp_MinimumVolumeFeeConditionOnVolumeCommitments
Namespace Prefix:	amgp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Term of construction.

+ References

No definition available.

+ Details

Name:	amgp_TermOfConstruction
Namespace Prefix:	amgp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents percentage of third party out of pocket cost reimbursement.

+ References

No definition available.

+ Details

Name:	amgp_ThirdPartyOutOfPocketCostsReimbursementPercentage
Namespace Prefix:	amgp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_TypeOfArrangementAxis=amgp_GatheringAndCompressionAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=amgp_WaterServicesAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Revenue (Details) $ in Millions			9 Months Ended
Revenue (Details) $ in Millions	Sep. 23, 2015	Nov. 10, 2014	Sep. 30, 2019 USD ($) bbl
Agreements
Third party out of pocket costs reimbursement (as a percent)			3.00%
Minimum volume commitment that require Antero to pay for high pressure lines			75.00%
Minimum volume commitment that require Antero to pay for compressor stations			70.00%
Term of new construction			10 years
Number of barrels per day \| bbl			120,000
Gathering And Compression Agreement
Agreements
Term of agreement with Antero Resources		20 years
Notice period		180 days
Water Services Agreement
Agreements
Term of agreement with Antero Resources	20 years
Notice period	180 days
Third party out of pocket costs reimbursement (as a percent)			3.00%
Minimum volume commitments and other fees \| $			$ 0.0