Amount of daily dry gas compression capacity.

No definition available.

Name:	am_DryGasCompressionCapacity
Namespace Prefix:	am_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of compressor stations acquired.

+ References

No definition available.

+ Details

Name:	am_NumberOfCompressorStationsAcquired
Namespace Prefix:	am_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of miles the pipeline is acquired.

+ References

No definition available.

+ Details

Name:	am_NumberOfMilesPipelinesAcquired
Namespace Prefix:	am_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount, before accumulated depreciation, depletion, amortization, and valuation allowance, of capitalized cost for well and related equipment and facility in oil- and gas-producing activities. Includes, but is not limited to, cost incurred to drill and equip exploratory well and exploratory-type stratigraphic test well that has found proved reserve and cost incurred to obtain access to proved reserve and provide facility for extracting, treating, gathering, and storing oil and gas, including the drilling and equipping of development well, development-type stratigraphic test well, and service well.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 932
-SubTopic 235
-Name Accounting Standards Codification
-Section 50
-Paragraph 15
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477215/932-235-50-15

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 932
-SubTopic 235
-Name Accounting Standards Codification
-Section 50
-Paragraph 15
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477215/932-235-50-15

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 932
-SubTopic 235
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477215/932-235-50-13

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Topic 932
-SubTopic 360
-Name Accounting Standards Codification
-Section 25
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478083/932-360-25-4

+ Details

Name:	us-gaap_CapitalizedCostsWellsAndRelatedEquipmentAndFacilities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount before accumulated depletion of real estate held for productive use, excluding land held for sale.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(13))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_Land
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 805
-SubTopic 50
-Name Accounting Standards Codification
-Section 25
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480060/805-50-25-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 805
-SubTopic 50
-Name Accounting Standards Codification
-Section 30
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480027/805-50-30-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 805
-SubTopic 50
-Name Accounting Standards Codification
-Section 30
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480027/805-50-30-2

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 13
-Subparagraph (c)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-13

+ Details

Name:	us-gaap_PaymentsToAcquireProductiveAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_AssetAcquisitionAxis=am_CrestwoodEquityPartnersLpMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=am_MarcellusGasGatheringAndCompressionAcquisitionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AssetAcquisitionAxis=am_SummitMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AssetAcquisitionAxis=am_EnlinkMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=am_UticaCompressionAssetsAcquisitionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Property and Equipment - Acquisitions (Details)				12 Months Ended
Property and Equipment - Acquisitions (Details)	May 01, 2024 USD ($) MMcf / D	Dec. 21, 2022 USD ($) MMcf / D	Oct. 25, 2022 USD ($) MMcf / D	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Property and Equipment
Cash payments				$ 69,992,000	$ 266,000	$ 216,726,000
Crestwood Equity Partners LP \| Marcellus gas gathering and compression assets
Property and Equipment
Cash payments			$ 205,000,000
Number of miles pipeline acquired			72
Number of compressor stations acquired			9
Dry gas compression capacity \| MMcf / D			700
Land			$ 3,000,000
Gathering systems and facilities			$ 202,000,000
Summit \| Marcellus gas gathering and compression assets
Property and Equipment
Cash payments	$ 70,000,000
Number of miles pipeline acquired	48
Number of compressor stations acquired	2
Dry gas compression capacity \| MMcf / D	100
EnLink \| Utica compression assets
Property and Equipment
Cash payments		$ 10,000,000
Number of compressor stations acquired		4
Dry gas compression capacity \| MMcf / D		380