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Debt (Details) $ in Millions |  | 1 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Jan. 26, 2016 USD ($) | Feb. 29, 2016 USD ($) | Jan. 31, 2016 USD ($) | Jun. 30, 2016 USD ($) | Jun. 30, 2015 USD ($) | Dec. 31, 2015 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |
KMGP, $1,000 Liquidation Value Series A Fixed-to-Floating Rate Term Cumulative Preferred Stock |  |  |  | $ 100 |  | $ 100
Less: Current portion of debt(a)(d) |  |  |  | 3,419 |  | 821
Long-term debt |  |  |  | 40,201 |  | 42,406
Debt Instrument, Fair Value Disclosure |  |  |  | 1,988 |  | 1,674
Repayments of Debt |  |  |  | 6,800 | $ 8,941 |
Long-term Debt, Current Maturities |  |  |  |  |  | 1,000
Kinder Morgan, Inc. [Member] | Unsecured term loan facility, variable rate, due January 26, 2019(a) |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Senior Notes | $ 1,000 |  |  | 1,000 |  | 0
Debt Instrument, Term | 3 years |  |  |  |  |
Kinder Morgan, Inc. [Member] | Senior notes, 1.50% through 8.25%, due 2016 through 2098(b) |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Senior Notes |  |  |  | 13,309 |  | 13,346
Kinder Morgan, Inc. [Member] | Senior unsecured revolving credit facility [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Credit facility due November 26, 2019(c) |  |  |  | 700 |  | 0
Kinder Morgan, Inc. [Member] | Commercial Paper [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Commercial paper borrowings(c) |  |  |  | $ 24 |  | 0
Kinder Morgan, Inc. [Member] | Revolving Credit Facility [Member] | KMI Credit Facility [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt, Weighted Average Interest Rate |  |  |  | 1.91% |  |
Kinder Morgan Energy Partners, L.P. [Member] | Senior notes, 2.65% through 9.00%, due 2016 through 2044 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Senior Notes |  |  |  | $ 19,485 |  | 19,985
TGP [Member] | TGP senior notes, 7.00% through 8.375%, due 2016 through 2037 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Senior Notes |  |  |  | 1,540 |  | 1,790
TGP [Member] | $250 million 8.00% notes due 2016 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Repayments of Debt |  | $ 250 |  | $ 250 |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 8.00% |  |
EPNG [Member] | EPNG senior notes, 5.95% through 8.625%, due 2017 through 2032 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Senior Notes |  |  |  | $ 1,115 |  | 1,115
Copano Energy, L.L.C. [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Total debt – KMI and Subsidiaries |  |  |  | 332 |  |
Long-term debt |  |  |  | 374 |  | 378
Repayments of Debt |  |  |  | 0 | $ 0 |
Long-term Debt, Current Maturities |  |  |  | 0 |  | 0
Copano Energy, L.L.C. [Member] | Copano senior notes, 7.125%, due April 1, 2021 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Senior Notes |  |  |  | $ 332 |  | 332
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 7.125% |  |
Colorado Interstate Gas Company, L.L.C. [Member] | CIG senior notes, 6.85%, due June 15, 2037 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Senior Notes |  |  |  | $ 100 |  | 100
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 6.85% |  |
SNG [Member] | SNG notes, 4.40% through 8.00%, due 2017 through 2032 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notes Payable |  |  |  | $ 1,211 |  | 1,211
Kinder Morgan Finance Company, LLC [Member] | Kinder Morgan Finance Company, LLC, senior notes, 5.70% through 6.40%, due 2016 through 2036 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Senior Notes |  |  |  | 786 |  | 1,636
Kinder Morgan Finance Company, LLC [Member] | 5.70% Senior Notes due January 5, 2016 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Repayments of Debt |  |  | $ 850 | $ 850 |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 5.70% |  |
Hiland Partners Holdings LLC [Member] | Hiland Partners Holdings LLC, senior notes, 5.50% and 7.25%, due 2020 and 2022 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Senior Notes |  |  |  | $ 974 |  | 974
EPC Building LLC [Member] | EPC Building, LLC, promissory note, 3.967%, due 2016 through 2035 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notes Payable |  |  |  | $ 438 |  | 443
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 3.967% |  |
Capital Trust I [Member] | Preferred securities, 4.75%, due March 31, 2028 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Senior Notes |  |  |  | $ 221 |  | 221
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 4.75% |  |
Kinder Morgan G.P., Inc. [Member] | KMGP, $1,000 Liquidation Value Series A Fixed-to-Floating Rate Term Cumulative Preferred Stock |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
KMGP, $1,000 Liquidation Value Series A Fixed-to-Floating Rate Term Cumulative Preferred Stock |  |  |  | $ 100 |  | 100
KMI AND KMP [Member] | Other miscellaneous debt |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notes Payable |  |  |  | 297 |  | 300
Kinder Morgan, Inc and Subsidiaries [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Total debt – KMI and Subsidiaries |  |  |  | 41,632 |  | 41,553
Long-term debt |  |  |  | $ 38,213 |  | $ 40,732
Euro Member Countries, Euro | Senior Notes [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Foreign Currency Exchange Rate, Translation |  |  |  | 1.1106 |  | 1.0862
Translation Adjustment Functional to Reporting Currency, Increase (Decrease), Gross of Tax |  |  |  | $ 31 |  |

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