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Divestitures and Acquisition 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, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 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 | $ 1,245 | $ 0
Noncontrolling Interest, Increase from Sale of Parent Equity Interest |  |  |  | 1,049 |
Property, plant and equipment, net |  |  | 37,897 | 40,155 |
Other non-current assets |  |  | 1,355 | 1,582 |
Total Assets |  |  | 78,866 | 79,055 |
Current portion of debt |  |  | 3,388 | 2,828 |
Total other current liabilities |  |  | 7,557 | 6,181 |
Long-term debt |  |  | 33,936 | 35,015 |
Other long-term liabilities and deferred credits |  |  | 2,176 | 2,735 |
Total Liabilities |  |  | 43,669 | 43,931 |
Kinder Morgan Canada Limited Partnership [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Total current assets |  |  | 3,204 | 270 |
Property, plant and equipment, net |  |  | 719 | 2,956 |
Other non-current assets |  |  | 8 | 322 |
Total Assets |  |  | 3,931 | 3,548 |
Current portion of debt |  |  | 0 | 0 |
Total other current liabilities |  |  | 2,353 | 236 |
Long-term debt |  |  | 0 | 0 |
Other long-term liabilities and deferred credits |  |  | 52 | 414 |
Total Liabilities |  |  | $ 2,405 | 650 |
Accumulated other comprehensive loss |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Noncontrolling Interest, Increase from Sale of Parent Equity Interest |  |  |  | 51 |
Non-controlling interests |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Noncontrolling Interest, Increase from Sale of Parent Equity Interest |  |  |  | 684 |
Kinder Morgan Canada Limited [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  | 30.00% |  |  |
Kinder Morgan Canada Limited [Member] | KML Special Voting Shares [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Controlling Interest, Ownership Percentage by Parent |  | 100.00% |  |  |
Kinder Morgan Canada Limited [Member] | KML Voting Shares [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Controlling Interest, Ownership Percentage by Parent |  | 70.00% |  |  |
Sale of Equity Interest in Canadian Business [Member] |  |  |  |  |
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 |
Adjustments to Additional Paid in Capital, Other |  |  |  | 314 |
Deferred Income Tax Adjustment due to IPO |  |  |  | 166 |
Sale of Equity Interest in Canadian Business [Member] | Restricted Voting Shares [Member] | Kinder Morgan Canada Limited [Member] |  |  |  |  |
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 [Member] | Accumulated other comprehensive loss | Kinder Morgan Canada Limited [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Disposal Group, Including Discontinued Operation, Foreign Currency Translation Gains (Losses) |  |  |  | (81) |
Sale of Equity Interest in Canadian Business [Member] | Non-controlling interests | Kinder Morgan Canada Limited [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Noncontrolling Interest, Increase from Sale of Parent Equity Interest |  |  |  | 765 |
Disposal Group, Including Discontinued Operation, Foreign Currency Translation Gains (Losses) |  |  |  | $ 81 |
Sale of Equity Interest in Canadian Business [Member] | Kinder Morgan Canada Limited Partnership [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  | 30.00% |  |  |
Controlling Interest Percentage Retained After Partial Sale | 70.00% | 70.00% |  |  |

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