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Stockholders' Equity Noncontrolling Interests (Details) $ / shares in Units, $ in Millions, $ in Millions |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | ---
Jan. 03, 2019 USD ($) | Jan. 03, 2019 CAD ($) | Dec. 08, 2017 USD ($) shares | Dec. 08, 2017 CAD ($) $ / shares shares | Aug. 15, 2017 USD ($) shares | Aug. 15, 2017 CAD ($) $ / shares shares | May 30, 2017 shares | Dec. 31, 2018 USD ($) $ / shares | Dec. 31, 2018 USD ($) shares | Dec. 31, 2017 USD ($) shares | Dec. 31, 2017 CAD ($) shares | Dec. 31, 2016 USD ($)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest |  |  |  |  |  |  |  | $ 853 | $ 853 | $ 1,488 |  |
Dividends, Preferred Stock, Cash |  |  |  |  |  |  |  |  | 128 | 156 |  | $ 156
Kinder Morgan Canada Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |
Cash distributions paid in the period to the public |  |  |  |  |  |  |  |  | 38 | 13 |  |
Value of Restricted Shares Issued in Lieu of Cash Dividends |  |  |  |  |  |  |  |  | $ 14 | $ 5 |  |
Share distributions paid in the period to the public under KML’s DRIP | shares |  |  |  |  |  |  |  |  | 1,092,791 | 418,989 | 418,989 |
Restricted Voting Shares in Public Offering [Member] | Kinder Morgan Canada Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |
Share issued (in shares) | shares |  |  |  |  |  |  | 102,942,000 |  |  |  |  |
Restricted Voting Shares [Member] | Kinder Morgan Canada Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total value of distributions paid in the period |  |  |  |  |  |  |  |  | $ 52 | $ 18 |  |
Cumulative Redeemable Minimum Rate Reset Preferred Shares, Series 1 and 3 [Member] [Domain] | Kinder Morgan Canada Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |
Dividends, Preferred Stock, Cash |  |  |  |  |  |  |  |  | $ 21 |  |  |
Cumulative Redeemable Minimum Rate Reset Preferred Shares, Series 1 [Member] | Kinder Morgan Canada Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |
Share issued (in shares) | shares |  |  |  |  | 12,000,000 | 12,000,000 |  |  |  |  |  |
Preferred Stock, Series 1 Offering Price, Per Share | $ / shares |  |  |  |  |  | $ 25.00 |  |  |  |  |  |
Proceeds from Issuance of Preferred Stock and Preference Stock |  |  |  |  | $ 235 | $ 300 |  |  |  |  |  |
Net Proceeds from issuance of Preferred Stock |  |  |  |  |  |  |  |  |  | 230 | $ 293 |
Preferred Shares, Annualized Dividend Per Share | $ / shares |  |  |  |  |  |  |  | $ 1.3125 |  |  |  |
Dividends, Preferred Stock, Cash |  |  |  |  |  |  |  |  |  | 3 |  |
Cumulative Redeemable Minimum Rate Reset Preferred Shares, Series 3 [Member] | Kinder Morgan Canada Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |
Share issued (in shares) | shares |  |  | 10,000,000 | 10,000,000 |  |  |  |  |  |  |  |
Proceeds from Issuance of Preferred Stock and Preference Stock |  |  | $ 195 | $ 250 |  |  |  |  |  |  |  |
Preferred Stock, Series 3 Offering Price, Per Share | $ / shares |  |  |  | $ 25.00 |  |  |  |  |  |  |  |
Net Proceeds from issuance of Preferred Stock |  |  |  |  |  |  |  |  |  | 189 | $ 243 |
Preferred Shares, Annualized Dividend Per Share | $ / shares |  |  |  |  |  |  |  | $ 1.3000 |  |  |  |
Minimum [Member] | Kinder Morgan Canada Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |
Market Discount for the Dividend Paid on Restricted Voting Shares |  |  |  |  |  |  |  |  | 0.00% |  |  |
Maximum [Member] | Kinder Morgan Canada Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |
Market Discount for the Dividend Paid on Restricted Voting Shares |  |  |  |  |  |  |  |  | 5.00% |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |
Payments to Noncontrolling Interests | $ 900 | $ 1,200 |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Member] |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest |  |  |  |  |  |  |  | $ 853 | $ 853 | 1,488 |  |
Kinder Morgan Canada Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  |  |  |  |  | 30.00% |  |  |  |  |
Kinder Morgan Canada Limited Partnership [Member] | Noncontrolling Interest [Member] |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest |  |  |  |  |  |  |  | 514 | 514 | 1,163 |  |
Others [Member] [Member] | Noncontrolling Interest [Member] |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest |  |  |  |  |  |  |  | $ 339 | $ 339 | $ 325 |  |

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