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v3.19.3.a.u2

Guarantee of Securities of Subsidiaries Guarantee of Securities of Subsidiaries (Details) $ in Millions | Dec. 31, 2019 USD ($)
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Parent Issuer and Guarantor |
Total debt - KMI and Subsidiaries | $ 13,264
Subsidiary Issuer and Guarantor - KMP |
Total debt - KMI and Subsidiaries | 16,610
Subsidiary Guarantors |
Total debt - KMI and Subsidiaries | 2,535
Other Financing Obligations Not Subject to Cross Guarantee Agreement | $ 168

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- Definition Capitalized Lease Debt Not Subject to Cross Guarantee Agreement + References No definition available. + Details
Name: | kmi_CapitalizedLeaseDebtNotSubjecttoCrossGuaranteeAgreement
Namespace Prefix: | kmi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | srt_ConsolidatedEntitiesAxis=srt_ParentCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_ConsolidatedEntitiesAxis=kmi_KMPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_ConsolidatedEntitiesAxis=kmi_GuarantorSubsidiariesOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |