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Stockholders Equity (Tables) | 12 Months Ended
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Dec. 31, 2018
Stockholders' Equity Note [Abstract] |
Schedule of Dividends Payable [Table Text Block] | The following table provides information about our per share dividends:
| Year Ended December 31,
| 2018 |  | 2017 |  | 2016
Per common share cash dividend declared for the period | $ | 0.80 |  |  | $ | 0.50 |  |  | $ | 0.50 |
Per common share cash dividend paid in the period | 0.725 |  |  | 0.50 |  |  | 0.50 |
Schedule of Preferred Stock Dividends [Table Text Block] | The following table provides information regarding our preferred stock dividends:
Period |  | Total dividend per share for the period |  | Date of declaration |  | Date of record |  | Date of dividend
January 26, 2018 through April 25, 2018 |  | $24.375 |  | January 17, 2018 |  | April 11, 2018 |  | April 26, 2018
April 26, 2018 through July 25, 2018 |  | 24.375 |  | April 18, 2018 |  | July 11, 2018 |  | July 26, 2018
July 26, 2018 through October 25, 2018 |  | 24.375 |  | July 18, 2018 |  | October 11, 2018 |  | October 26, 2018
noncontrolling interest table [Table Text Block] | The caption “Noncontrolling interests” in our accompanying consolidated balance sheets consists of interests that we do not own in the following subsidiaries (in millions):
| December 31,
| 2018 |  | 2017
KML(a) | $ | 514 |  |  | $ | 1,163 |
Others | 339 |  |  | 325 |
| $ | 853 |  |  | $ | 1,488 |
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(a) | The reduction in the noncontrolling interests associated with KML is primarily attributable to the accrual of the return of capital distribution for the net proceeds from the TMPL Sale paid to KML’s Restricted Voting Shareholders on January 3, 2019 of approximately $0.9 billion.

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