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Acquisitions and Divestitures Sale of Interest in Canadian Business (Details) CAD / shares in Units, CAD in Millions, $ in Millions |  | 12 Months Ended
--- | --- | ---
May 30, 2017 USD ($) | May 30, 2017 CAD CAD / shares shares | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Proceeds from noncontrolling interests |  |  | $ 12 | $ 117 | $ 11
Noncontrolling Interest, Increase from Sale of Parent Equity Interest |  |  | 1,049 |  |
Total current assets |  |  | 2,715 | 3,229 |
Property, plant and equipment, net |  |  | 40,155 | 38,705 |
Other non-current assets |  |  | 1,582 | 1,522 |
Total Assets |  |  | 79,055 | 80,305 |
Current portion of debt |  |  | 2,828 | 2,696 |
Total other current liabilities |  |  | 6,181 | 5,924 |
Long-term debt |  |  | 35,015 | 37,354 |
Other long-term liabilities and deferred credits |  |  | 2,735 | 2,225 |
Total Liabilities |  |  | $ 43,931 | $ 45,503 |
Other funded debt percentage |  |  | 60.00% |  |
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 Partnership [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Total current assets |  |  | $ 270 |  |
Property, plant and equipment, net |  |  | 2,956 |  |
Other non-current assets |  |  | 322 |  |
Total Assets |  |  | 3,548 |  |
Current portion of debt |  |  | 0 |  |
Total other current liabilities |  |  | 236 |  |
Long-term debt |  |  | 0 |  |
Other long-term liabilities and deferred credits |  |  | 414 |  |
Total Liabilities |  |  | 650 |  |
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] | 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] |  |  |  |  |
Proceeds from noncontrolling interests |  |  | 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 |  |  |
Shares Issued, Price Per Share | CAD / shares |  | CAD 17.00 |  |  |
Proceeds from Issuance Initial Public Offering | $ 1,299 | CAD 1,750 |  |  |
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% |  |  |

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