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v3.24.0.1

Revenue (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2019 area
Gathering And Compression Agreement |  |  |  |
Agreements |  |  |  |
Notice period | 180 days |  |  |
Rebate issued | $ | $ 52 | $ 48 | $ 12 |
Gathering And Compression Agreement | Utica |  |  |  |
Agreements |  |  |  |
Number of dedicated areas | area |  |  |  | 2
Water Handling Agreement |  |  |  |
Agreements |  |  |  |
Notice period | 180 days |  |  |
Third party out of pocket costs reimbursement markup (as a percent) | 3.00% |  |  |

X
- Definition Represents information related to agreements. + References No definition available. + Details
Name: | am_Agreements
Namespace Prefix: | am_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The compression agreement number of dedicated areas. + References No definition available. + Details
Name: | am_CompressionAgreementNumberOfDedicatedAreas
Namespace Prefix: | am_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The period prior to which notice to be served for the termination of the contract. + References No definition available. + Details
Name: | am_MinimumNoticePeriodForTerminationOfContract
Namespace Prefix: | am_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of rebate issued based on volumetric targets achieved. + References No definition available. + Details
Name: | am_RebateIssued
Namespace Prefix: | am_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents percentage of third party out of pocket cost reimbursement markup. + References No definition available. + Details
Name: | am_ThirdPartyOutOfPocketCostsReimbursementPercentage
Namespace Prefix: | am_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=am_GatheringAndCompressionAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CounterpartyNameAxis=am_UticaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=am_WaterServicesAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |