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Divestitures - Sale of Interest in Canadian Business (Details) $ / shares in Units, $ in Millions, $ in Millions |  | 12 Months Ended
--- | --- | ---
May 30, 2017 USD ($) shares | May 30, 2017 CAD ($) $ / shares shares | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Contributions from noncontrolling interests - net proceeds from KML IPO |  |  | $ 0 | $ 0 | $ 1,245
KML preferred share issuance |  |  |  |  | 1,049
Restricted Voting Shares | Kinder Morgan Canada Limited |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Shares, Issued | shares | 102,942,000 | 102,942,000 |  |  |
Additional paid-in capital |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
KML preferred share issuance |  |  |  |  | 314
Non-controlling interests |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
KML preferred share issuance |  |  |  |  | 684
Accumulated other comprehensive loss |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
KML preferred share issuance |  |  |  |  | 51
Kinder Morgan Canada Limited |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Ownership percentage by noncontrolling owners |  | 30.00% |  |  |
Sale of Equity Interest in Canadian Business |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Contributions from noncontrolling interests - net proceeds from KML IPO |  |  |  |  | 1,245
Deferred Income Tax Adjustment due to IPO |  |  |  |  | 166
Sale of Equity Interest in Canadian Business | Restricted Voting Shares | Kinder Morgan Canada Limited |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Shares, Issued | shares | 102,942,000 | 102,942,000 |  |  |
Shares Issued, Price Per Share | $ / shares |  | $ 17.00 |  |  |
Proceeds from Issuance Initial Public Offering | $ 1,299 | $ 1,750 |  |  |
Sale of Equity Interest in Canadian Business | Additional paid-in capital |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
KML preferred share issuance |  |  |  |  | 314
Sale of Equity Interest in Canadian Business | Non-controlling interests |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
KML preferred share issuance |  |  |  |  | $ 684
Sale of Equity Interest in Canadian Business | Kinder Morgan Canada Limited Partnership |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Ownership percentage by noncontrolling owners |  | 30.00% |  |  |
Controlling Interest Percentage Retained After Partial Sale | 70.00% | 70.00% |  |  |

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