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General - Organization and Basis of Presentation (Details) mi in Thousands | May 31, 2024 segment | Jun. 30, 2024 Bcf mi Terminals
--- | --- | ---
General [Line Items] |  |
Miles of pipeline | mi |  | 79
Number of pipeline terminals owned interest in and/or operated | Terminals |  | 139
Working capacity |  | 702
Number of reporting units | segment | 7 |
Renewable Natural Gas |  |
General [Line Items] |  |
Gross production |  | 6.1

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- Definition Energy Production + References No definition available. + Details
Name: | kmi_EnergyProduction
Namespace Prefix: | kmi_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

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- Definition Miles Of Pipeline + References No definition available. + Details
Name: | kmi_MilesOfPipeline
Namespace Prefix: | kmi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Number Of Pipeline Terminals Owned Interest In And Or Operated + References No definition available. + Details
Name: | kmi_NumberOfPipelineTerminalsOwnedInterestInAndOrOperated
Namespace Prefix: | kmi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Working Capacity Of Business + References No definition available. + Details
Name: | kmi_WorkingCapacityOfBusiness
Namespace Prefix: | kmi_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

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- Definition Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment. + References No definition available. + Details
Name: | us-gaap_NumberOfReportingUnits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- 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 No definition available. + Details
Name: | us-gaap_PublicUtilitiesGeneralDisclosuresLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | srt_EnergyAxis=kmi_RenewableNaturalGasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |