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Debt - Schedule of Debt (Details) - USD ($) $ in Millions | Jul. 31, 2024 | Feb. 01, 2024 | Dec. 31, 2024 | Dec. 31, 2023
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Debt Instrument [Line Items] |  |  |  |
Total debt – KMI and Subsidiaries |  |  | $ 31,788 | $ 31,929
Less: Current portion of debt |  |  | 2,009 | 4,049
Total long-term debt – KMI and Subsidiaries(f) |  |  | 29,779 | 27,880
Commercial paper notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Less: Current portion of debt |  |  | $ 331 | $ 1,989
Weighted average interest rate |  |  | 4.60% | 5.68%
Credit facility and commercial paper borrowings(a) |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Less: Current portion of debt |  |  | $ 331 | $ 1,989
EPC Building, LLC, promissory note, 3.967%, due January 2023 through December 2035 | EPC Building LLC |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 3.967% |
Total debt – KMI and Subsidiaries |  |  | $ 310 | 330
Trust I Preferred Securities, 4.75%, due March 2028(d) | Capital Trust I |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 4.75% |
Total debt – KMI and Subsidiaries |  |  | $ 221 | 221
Less: Current portion of debt |  |  | 111 | 111
Other miscellaneous debt(e) |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Total debt – KMI and Subsidiaries |  |  | 205 | 234
Less: Current portion of debt |  |  | 67 | $ 49
Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Proceeds from debt, net | $ 1,235 | $ 2,230 |  |
Senior Notes | 4.15%, due February 2024 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  |  | 4.15%
Total debt – KMI and Subsidiaries |  |  | 0 | $ 650
Less: Current portion of debt |  |  | 0 | $ 650
Senior Notes | 4.30%, due May 2024 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  |  | 4.30%
Total debt – KMI and Subsidiaries |  |  | 0 | $ 600
Less: Current portion of debt |  |  | 0 | $ 600
Senior Notes | 4.25%, due September 2024 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  |  | 4.25%
Total debt – KMI and Subsidiaries |  |  | 0 | $ 650
Less: Current portion of debt |  |  | $ 0 | 650
Senior Notes | 4.30%, due June 2025 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 4.30% |
Total debt – KMI and Subsidiaries |  |  | $ 1,500 | 1,500
Less: Current portion of debt |  |  | $ 1,500 | 0
Senior Notes | 1.75%, due November 2026 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 1.75% |
Total debt – KMI and Subsidiaries |  |  | $ 500 | 500
Senior Notes | 6.70%, due February 2027 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 6.70% |
Total debt – KMI and Subsidiaries |  |  | $ 7 | 7
Senior Notes | 2.25%, due March 2027(c) |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 2.25% |
Total debt – KMI and Subsidiaries |  |  | $ 518 | 552
Senior Notes | 6.67%, due November 2027 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 6.67% |
Total debt – KMI and Subsidiaries |  |  | $ 7 | 7
Senior Notes | 4.30%, due March 2028 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 4.30% |
Total debt – KMI and Subsidiaries |  |  | $ 1,250 | 1,250
Senior Notes | 7.25%, due March 2028 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 7.25% |
Total debt – KMI and Subsidiaries |  |  | $ 32 | 32
Senior Notes | 6.95%, due June 2028 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 6.95% |
Total debt – KMI and Subsidiaries |  |  | $ 31 | 31
Senior Notes | 5.00%, due February 2029 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  | 5.00% | 5.00% |
Total debt – KMI and Subsidiaries |  | $ 1,250 | $ 1,250 | 0
Senior Notes | 5.10% due August 2029 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage | 5.10% |  | 5.10% |
Total debt – KMI and Subsidiaries | $ 500 |  | $ 500 | 0
Senior Notes | 8.05%, due October 2030 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 8.05% |
Total debt – KMI and Subsidiaries |  |  | $ 234 | 234
Senior Notes | 2.00%, due February 2031 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 2.00% |
Total debt – KMI and Subsidiaries |  |  | $ 750 | 750
Senior Notes | 7.40%, due March 2031 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 7.40% |
Total debt – KMI and Subsidiaries |  |  | $ 300 | 300
Senior Notes | 7.80%, due August 2031 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 7.80% |
Total debt – KMI and Subsidiaries |  |  | $ 537 | 537
Senior Notes | 7.75%, due January 2032 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 7.75% |
Total debt – KMI and Subsidiaries |  |  | $ 1,005 | 1,005
Senior Notes | 7.75%, due March 2032 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 7.75% |
Total debt – KMI and Subsidiaries |  |  | $ 300 | 300
Senior Notes | 4.80%, due February 2033 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 4.80% |
Total debt – KMI and Subsidiaries |  |  | $ 750 | 750
Senior Notes | 5.20%, due June 2033 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 5.20% |
Total debt – KMI and Subsidiaries |  |  | $ 1,500 | 1,500
Senior Notes | 7.30%, due August 2033 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 7.30% |
Total debt – KMI and Subsidiaries |  |  | $ 500 | 500
Senior Notes | 5.40%, due February 2034 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  | 5.40% | 5.40% |
Total debt – KMI and Subsidiaries |  | $ 1,000 | $ 1,000 | 0
Senior Notes | 5.30%, due December 2034 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 5.30% |
Total debt – KMI and Subsidiaries |  |  | $ 750 | 750
Senior Notes | 5.80%, due March 2035 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 5.80% |
Total debt – KMI and Subsidiaries |  |  | $ 500 | 500
Senior Notes | 7.75%, due October 2035 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 7.75% |
Total debt – KMI and Subsidiaries |  |  | $ 1 | 1
Senior Notes | 6.40%, due January 2036 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 6.40% |
Total debt – KMI and Subsidiaries |  |  | $ 36 | 36
Senior Notes | 6.50%, due February 2037 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 6.50% |
Total debt – KMI and Subsidiaries |  |  | $ 400 | 400
Senior Notes | 7.42%, due February 2037 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 7.42% |
Total debt – KMI and Subsidiaries |  |  | $ 47 | 47
Senior Notes | 6.95%, due January 2038 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 6.95% |
Total debt – KMI and Subsidiaries |  |  | $ 1,175 | 1,175
Senior Notes | 6.50%, due September 2039 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 6.50% |
Total debt – KMI and Subsidiaries |  |  | $ 600 | 600
Senior Notes | 6.55%, due September 2040 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 6.55% |
Total debt – KMI and Subsidiaries |  |  | $ 400 | 400
Senior Notes | 7.50%, due November 2040 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 7.50% |
Total debt – KMI and Subsidiaries |  |  | $ 375 | 375
Senior Notes | 6.375%, due March 2041 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 6.375% |
Total debt – KMI and Subsidiaries |  |  | $ 600 | 600
Senior Notes | 5.625%, due September 2041 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 5.625% |
Total debt – KMI and Subsidiaries |  |  | $ 375 | 375
Senior Notes | 5.00%, due August 2042 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 5.00% |
Total debt – KMI and Subsidiaries |  |  | $ 625 | 625
Senior Notes | 4.70%, due November 2042 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 4.70% |
Total debt – KMI and Subsidiaries |  |  | $ 475 | 475
Senior Notes | 5.00%, due March 2043 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 5.00% |
Total debt – KMI and Subsidiaries |  |  | $ 700 | 700
Senior Notes | 5.50%, due March 2044 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 5.50% |
Total debt – KMI and Subsidiaries |  |  | $ 750 | 750
Senior Notes | 5.40%, due September 2044 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 5.40% |
Total debt – KMI and Subsidiaries |  |  | $ 550 | 550
Senior Notes | 5.55%, due June 2045 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 5.55% |
Total debt – KMI and Subsidiaries |  |  | $ 1,750 | 1,750
Senior Notes | 5.05%, due February 2046 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 5.05% |
Total debt – KMI and Subsidiaries |  |  | $ 800 | 800
Senior Notes | 5.20%, due March 2048 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 5.20% |
Total debt – KMI and Subsidiaries |  |  | $ 750 | 750
Senior Notes | 3.25%, due August 2050 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 3.25% |
Total debt – KMI and Subsidiaries |  |  | $ 500 | 500
Senior Notes | 3.60%, due February 2051 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 3.60% |
Total debt – KMI and Subsidiaries |  |  | $ 1,050 | 1,050
Senior Notes | 5.45%, due August 2052 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 5.45% |
Total debt – KMI and Subsidiaries |  |  | $ 750 | 750
Senior Notes | 5.95% due August 2054 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage | 5.95% |  | 5.95% |
Total debt – KMI and Subsidiaries | $ 750 |  | $ 750 | 0
Senior Notes | 7.45%, due March 2098 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 7.45% |
Total debt – KMI and Subsidiaries |  |  | $ 26 | 26
Senior Notes | 7.00%, due March 2027 | TGP |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 7.00% |
Total debt – KMI and Subsidiaries |  |  | $ 300 | 300
Senior Notes | 7.00%, due October 2028 | TGP |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 7.00% |
Total debt – KMI and Subsidiaries |  |  | $ 400 | 400
Senior Notes | 2.90%, due March 2030 | TGP |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 2.90% |
Total debt – KMI and Subsidiaries |  |  | $ 1,000 | 1,000
Senior Notes | 8.375%, due June 2032 | TGP |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 8.375% |
Total debt – KMI and Subsidiaries |  |  | $ 240 | 240
Senior Notes | 7.625%, due April 2037 | TGP |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 7.625% |
Total debt – KMI and Subsidiaries |  |  | $ 300 | 300
Senior Notes | 7.50%, due November 2026 | EPNG |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 7.50% |
Total debt – KMI and Subsidiaries |  |  | $ 200 | 200
Senior Notes | 3.50%, due February 2032 | EPNG |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 3.50% |
Total debt – KMI and Subsidiaries |  |  | $ 300 | 300
Senior Notes | 8.375%, due June 2032 | EPNG |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 8.375% |
Total debt – KMI and Subsidiaries |  |  | $ 300 | 300
Senior Notes | 4.15%, due August 2026 | CIG |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 4.15% |
Total debt – KMI and Subsidiaries |  |  | $ 375 | 375
Senior Notes | 6.85%, due June 2037 | CIG |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 6.85% |
Total debt – KMI and Subsidiaries |  |  | $ 100 | $ 100

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