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Share-based Compensation and Employee Benefits - Summary of Future Vesting of Outstanding Restricted Stock Awards (Details) - Restricted Stock Awards - Class P - shares shares in Thousands	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards outstanding	13,000
Kinder Morgan Inc 2015 Amended and Restated Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards outstanding	12,682	12,414
Kinder Morgan Inc 2015 Amended and Restated Stock Incentive Plan | 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards outstanding	4,216
Kinder Morgan Inc 2015 Amended and Restated Stock Incentive Plan | 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards outstanding	3,051
Kinder Morgan Inc 2015 Amended and Restated Stock Incentive Plan | 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards outstanding	4,775
Kinder Morgan Inc 2015 Amended and Restated Stock Incentive Plan | 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards outstanding	127
Kinder Morgan Inc 2015 Amended and Restated Stock Incentive Plan | 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards outstanding	513

X

- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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+ References

No definition available.

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