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Debt (Details) - USD ($) $ / shares in Units, $ in Millions |  |  |  |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 01, 2017 | Aug. 13, 2017 | Aug. 10, 2017 | Jun. 15, 2017 | Apr. 15, 2017 | Apr. 01, 2017 | Feb. 01, 2017 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Preferred interest in general partner of KMP |  |  |  |  |  |  |  | $ 100.0 | $ 100.0 |
Less: Current portion of debt(a)(f)(k) |  |  |  |  |  |  |  | 2,828.0 | 2,696.0 |
Total Long-term debt - KMI and Subsidiaries(l) |  |  |  |  |  |  |  | 35,015.0 | 37,354.0 |
Proceeds from Issuance of Debt |  |  |  |  |  |  |  | 8,868.0 | 8,629.0 | $ 14,316.0
Repayments of Debt |  |  |  |  |  |  |  | 11,064.0 | 10,060.0 | 15,116.0
Gain (Loss) on Extinguishment of Debt |  |  |  |  |  |  |  | $ (4.0) | $ 45.0 | $ 0.0
Preferred Stock, Liquidation Preference Per Share |  |  |  |  |  |  |  | $ 1,000 | $ 1,000 |
Value of preferred securities value assigned to debt |  |  |  |  |  |  |  | $ 200.0 |  |
Value of preferred securities value assigned to equity |  |  |  |  |  |  |  | $ 21.0 |  |
Preferred stock, shares outstanding (in shares) |  |  |  |  |  |  |  | 1,600,000 | 1,600,000 |
Preferred Stock, Dividend Rate, Percentage |  |  |  |  |  |  |  | 9.75% | 9.75% |
Debt Instrument, Fair Value Disclosure |  |  |  |  |  |  |  | $ 927.0 | $ 1,149.0 |
Commercial Paper [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Commercial Paper |  |  |  |  |  |  |  | $ 240.0 |  |
Kinder Morgan, Inc. |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Redemption price of debt as a percentage of face amount |  |  |  |  |  |  |  | 100.00% |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights |  |  |  |  |  |  |  | 1.100 |  |
Kinder Morgan, Inc. | Senior unsecured revolving credit facility due 2019 [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Amount Outstanding |  |  |  |  |  |  |  | $ 125.0 | 0.0 |
Kinder Morgan, Inc. | Commercial Paper [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Commercial Paper |  |  |  |  |  |  |  | 240.0 | 0.0 |
Kinder Morgan Canada | Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Amount Outstanding |  |  |  |  |  |  |  | $ 0.0 | $ 0.0 |
Colorado Interstate Gas Company, L.L.C. [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Construction Costs Funded |  |  |  |  |  |  |  | 50.00% |  |
Capital Trust I [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Trust Convertible Preferred Securities Outstanding (in shares) |  |  |  |  |  |  |  | 4,400,000 |  |
Kinder Morgan G.P., Inc. [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Preferred stock, shares outstanding (in shares) |  |  |  |  |  |  |  | 100,000 | 100,000 |
Preferred Stock, Dividend Rate, Percentage |  |  |  |  |  |  |  | 3.8975% |  |
Kinder Morgan, Inc and Subsidiaries [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Total debt – KMI and Subsidiaries |  |  |  |  |  |  |  | $ 36,916.0 | $ 38,901.0 |
Total Long-term debt - KMI and Subsidiaries(l) |  |  |  |  |  |  |  | $ 34,088.0 | 36,205.0 |
Capital Trust [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  |  | 100.00% |  |
Senior unsecured term loan facility, variable, due 2019 [Member] | Kinder Morgan, Inc. |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Senior Notes |  |  |  |  |  |  |  | $ 0.0 | 1,000.0 |
Repayments of Debt |  |  | $ 1,000.0 |  |  |  |  |  |  |
Senior Notes, floating rate, due January 15, 2023 [Member] | Kinder Morgan, Inc. |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Senior Notes |  |  |  |  |  |  |  | 250.0 | 0.0 |
Proceeds from Issuance of Debt |  |  | 250.0 |  |  |  |  |  |  |
KMI Senior Notes,1.50% through 8.25%, due 2016 through 2098 [Member] | Kinder Morgan, Inc. |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Senior Notes |  |  |  |  |  |  |  | $ 13,136.0 | 13,236.0 |
Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Foreign Currency Exchange Rate, Translation |  |  |  |  |  |  |  | 0.7971 |  |
KMP Senior notes, 2.65% through 9.00%, due 2016 through 2044 [Member] | Kinder Morgan Energy Partners, L.P. [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Senior Notes |  |  |  |  |  |  |  | $ 18,885.0 | 19,485.0 |
KMP Senior notes, 7.00% through 8.375%, due 2016 through 2037 [Member] | TGP [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Senior Notes |  |  |  |  |  |  |  | 1,240.0 | 1,540.0 |
KMP 5.95% through 8.625%, due 2017 through 2032 [Member] [Member] | EPNG [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Senior Notes |  |  |  |  |  |  |  | 760.0 | 1,115.0 |
KMP Senior Notes 4.15% and 6.85%, due August 16, 2026 and June 15, 2037 [Member] | Colorado Interstate Gas Company, L.L.C. [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Senior Notes |  |  |  |  |  |  |  | 475.0 | 475.0 |
KMI 6.00% through 6.40% series, due 2018 through 2036 [Member] | Kinder Morgan Finance Company, LLC [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Senior Notes |  |  |  |  |  |  |  | 786.0 | 786.0 |
KMI Senior Note, 5.50%, due 2022 [Member] | Hiland Partners Holding LLC [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Senior Notes |  |  |  |  |  |  |  | $ 0.0 | 225.0 |
Interest rate, stated percentage |  | 5.50% |  |  |  |  |  | 5.50% |  |
Repayments of Debt |  | $ 225.0 |  |  |  |  |  |  |  |
Gain (Loss) on Extinguishment of Debt |  | 3.8 |  |  |  |  |  |  |  |
KMI Promissory note 3.967%, due 2017 through 2035 [Member] | EPC Building LLC [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Notes Payable |  |  |  |  |  |  |  | $ 421.0 | 433.0 |
Interest rate, stated percentage |  |  |  |  |  |  |  | 3.967% |  |
KMI EP Capital Trust I 4.75%, due 2028 [Member] | Capital Trust I [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Senior Notes |  |  |  |  |  |  |  | $ 221.0 | 221.0 |
Interest rate, stated percentage |  |  |  |  |  |  |  | 4.75% |  |
Preferred Stock, Liquidation Preference Per Share |  |  |  |  |  |  |  | $ 50 |  |
Long-term Debt, Current Maturities |  |  |  |  |  |  |  | $ 111.0 |  |
KMI $1,000 Liquidation Value Series A Fixed-to-Floating Rate Term Cumulative Preferred Stock [Member] | Kinder Morgan G.P., Inc. [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Preferred interest in general partner of KMP |  |  |  |  |  |  |  | $ 100.0 | 100.0 |
Preferred stock, par value (in dollars per share) |  |  |  |  |  |  |  | $ 1,000 |  |
Other Miscellaneous Subsidiary Debt [Member] | KMI, KMP and EPB [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Notes Payable |  |  |  |  |  |  |  | $ 277.0 | $ 285.0 |
Senior Notes, 3.15%, due January 15, 2023 [Member] | Kinder Morgan, Inc. |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  |  | $ 1,000.0 |  |  |  |  |  |  |
Interest rate, stated percentage |  |  | 3.15% |  |  |  |  |  |  |
KMI Senior Notes, 7.0%, due June 15, 2017 [Member] | Kinder Morgan, Inc. |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 7.00% |  |  |  |  | 7.00% |
Repayments of Debt |  |  |  | $ 786.0 |  |  |  |  |  |
KMI Senior Notes, 2.0%, due December 1, 2017 [Member] | Kinder Morgan, Inc. |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rate, stated percentage | 2.00% |  |  |  |  |  |  |  | 2.00% |
Repayments of Debt | $ 500.0 |  |  |  |  |  |  |  |  |
KMP Senior notes, 6.0%, due February 1, 2017 [Member] | Kinder Morgan Energy Partners, L.P. [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rate, stated percentage |  |  |  |  |  |  | 6.00% |  | 6.00% |
Repayments of Debt |  |  |  |  |  |  | $ 600.0 |  |  |
KMP Senior notes, 7.50%, due April 1, 2017 [Member] | TGP [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rate, stated percentage |  |  |  |  |  | 7.50% |  |  | 7.50% |
Repayments of Debt |  |  |  |  |  | $ 300.0 |  |  |  |
KMP Senior Notes, 5.95%, due April 15, 2017 [Member] | EPNG [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rate, stated percentage |  |  |  |  | 5.95% |  |  |  | 5.95% |
Repayments of Debt |  |  |  |  | $ 355.0 |  |  |  |  |
Totem [Member] | El Paso Pipeline Partners, L.P. [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Capital Lease Obligations |  |  |  |  |  |  |  | 69.0 |  |
High Plains [Member] | El Paso Pipeline Partners, L.P. [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Capital Lease Obligations |  |  |  |  |  |  |  | $ 88.0 |  |
Totem and High Plains [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rate, stated percentage |  |  |  |  |  |  |  | 15.50% |  |
Class P |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Preferred Stock, Conversion, Shares |  |  |  |  |  |  |  | 0.7197 |  |
Debt Instrument, Convertible, Conversion Price |  |  |  |  |  |  |  | $ 25.18 |  |
Euro Member Countries, Euro | Senior Notes [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Foreign Currency Exchange Rate, Translation |  |  |  |  |  |  |  | 1.2005 | 1.0517 |
Translation Adjustment Functional to Reporting Currency, Increase (Decrease), Gross of Tax |  |  |  |  |  |  |  | $ 186.0 |  |
Minimum [Member] | KMI Senior Notes,1.50% through 8.25%, due 2016 through 2098 [Member] | Kinder Morgan, Inc. |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rate, stated percentage |  |  |  |  |  |  |  | 1.50% |  |
Minimum [Member] | KMP Senior notes, 2.65% through 9.00%, due 2016 through 2044 [Member] | Kinder Morgan Energy Partners, L.P. [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rate, stated percentage |  |  |  |  |  |  |  | 2.65% |  |
Minimum [Member] | KMP Senior notes, 7.00% through 8.375%, due 2016 through 2037 [Member] | TGP [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rate, stated percentage |  |  |  |  |  |  |  | 7.00% |  |
Minimum [Member] | KMP 5.95% through 8.625%, due 2017 through 2032 [Member] [Member] | EPNG [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rate, stated percentage |  |  |  |  |  |  |  | 5.95% |  |
Minimum [Member] | KMP Senior Notes 4.15% and 6.85%, due August 16, 2026 and June 15, 2037 [Member] | Colorado Interstate Gas Company, L.L.C. [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rate, stated percentage |  |  |  |  |  |  |  | 4.15% |  |
Minimum [Member] | KMI 6.00% through 6.40% series, due 2018 through 2036 [Member] | Kinder Morgan Finance Company, LLC [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rate, stated percentage |  |  |  |  |  |  |  | 6.00% |  |
Maximum [Member] | KMI Senior Notes,1.50% through 8.25%, due 2016 through 2098 [Member] | Kinder Morgan, Inc. |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rate, stated percentage |  |  |  |  |  |  |  | 8.05% |  |
Maximum [Member] | KMP Senior notes, 2.65% through 9.00%, due 2016 through 2044 [Member] | Kinder Morgan Energy Partners, L.P. [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rate, stated percentage |  |  |  |  |  |  |  | 9.00% |  |
Maximum [Member] | KMP Senior notes, 7.00% through 8.375%, due 2016 through 2037 [Member] | TGP [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rate, stated percentage |  |  |  |  |  |  |  | 8.375% |  |
Maximum [Member] | KMP 5.95% through 8.625%, due 2017 through 2032 [Member] [Member] | EPNG [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rate, stated percentage |  |  |  |  |  |  |  | 8.625% |  |
Maximum [Member] | KMP Senior Notes 4.15% and 6.85%, due August 16, 2026 and June 15, 2037 [Member] | Colorado Interstate Gas Company, L.L.C. [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rate, stated percentage |  |  |  |  |  |  |  | 6.85% |  |
Maximum [Member] | KMI 6.00% through 6.40% series, due 2018 through 2036 [Member] | Kinder Morgan Finance Company, LLC [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rate, stated percentage |  |  |  |  |  |  |  | 6.40% |  |
Premium on Debt Repaid [Member] | KMI Senior Note, 5.50%, due 2022 [Member] | Hiland Partners Holding LLC [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Extinguishment of Debt |  | 9.3 |  |  |  |  |  |  |  |
Purchase Accounting [Member] | KMI Senior Note, 5.50%, due 2022 [Member] | Hiland Partners Holding LLC [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Extinguishment of Debt |  | $ 5.5 |  |  |  |  |  |  |  |

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