Fair Value Measurements (Details) - EBP 002 - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	$ 2,994,634	$ 2,678,166
Level 1
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	338,361	324,214
Level 2
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	3,113	3,707
Total
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	341,474	327,921
Kinder Morgan, Inc. Common Stock \| Level 1
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	85,539	94,902
Kinder Morgan, Inc. Common Stock \| Level 2
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	0	0
Kinder Morgan, Inc. Common Stock \| Total
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	85,539	94,902
Registered investment companies (mutual funds) \| Level 1
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	147,768	139,325
Registered investment companies (mutual funds) \| Level 2
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	0	0
Registered investment companies (mutual funds) \| Total
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	147,768	139,325
Self-directed brokerage accounts \| Level 1
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	105,054	89,987
Self-directed brokerage accounts \| Level 2
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	3,113	3,707
Self-directed brokerage accounts \| Total
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	108,167	93,694
Common collective trusts
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	2,653,160	2,350,245
Unfunded commitments	$ 0
Common collective trusts \| Minimum
EBP, Investment, Fair Value and NAV [Line Items]
Redemption period	0 days
Common collective trusts \| Maximum
EBP, Investment, Fair Value and NAV [Line Items]
Redemption period	15 days
Common collective trusts \| Measured at NAV
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	$ 2,653,160	$ 2,350,245

Period when restriction on redemption has been in effect for investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), that is measured at net asset value (NAV) per share as practical expedient for estimate of fair value, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of unfunded commitment for investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), that is fair value measured at net asset value (NAV) per share as practical expedient.

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Fair value of investment, excluding plan interest in master trust, held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Includes, but is not limited to, derivative, investment measured at net asset value per share as practical expedient, and insurance contract not meeting fully-benefit responsive investment criteria.

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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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