Construction Costs Funded

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Preferred Interest of General Partner, Par or Stated Value Per Share

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Preferred securities, value assigned to equity

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Preferred Stock, Conversion, Shares

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Preferred interest in general partner of KMP

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Redemption price of debt as a percentage of face amount

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Trust Convertible Preferred Securities Outstanding

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Value of preferred securities value assigned to debt

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Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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The number of warrants or rights which entitle the entity to receive future services in exchange for the unvested, forfeitable warrants or rights.

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Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days.

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Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer.

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The price per share of the conversion feature embedded in the debt instrument.

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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Contractual interest rate for funds borrowed, under the debt agreement.

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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.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Foreign exchange rate used to translate amounts denominated in functional currency to reporting currency.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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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.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.

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The percentage rate used to calculate dividend payments on preferred stock.

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The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share.

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Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

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The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

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Amount of cumulative translation gain (loss), before tax, from translating foreign currency financial statements into the reporting currency.

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Debt (Details) - USD ($) $ / shares in Units, $ in Millions								12 Months Ended
Debt (Details) - USD ($) $ / shares in Units, $ in Millions	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