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Partners' Capital (Tables) | 12 Months Ended
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Dec. 31, 2017
Partners' Capital [Abstract] |
Schedule of Common Unit Activity | As of December 31, 2017, $295 million of our common units remained available to be issued under the equity distribution agreement. Common unit activity for the years ended December 31, 2017 and 2016 was as follows:
| Number of Units |
Number of common units at December 31, 2015 | 87,365,706 |
Common units issued in connection with ETP Dropdown | 5,710,922 |
Common units issued in connection with the PIPE Transaction | 2,263,158 |
Common units issued in connection with the ATM | 2,840,399 |
Phantom unit vesting | 861 |
Number of common units at December 31, 2016 | 98,181,046 |
Common units issued in connection with the ATM | 1,268,750 |
Phantom unit vesting | 195,813 |
Other | 22,390 |
Number of common units at December 31, 2017 | 99,667,999 |
Schedule of Net Income Allocation By Partners | The calculation of net income allocated to the partners is as follows (in millions, except per unit amounts):
| Year Ended December 31, 2017 |  | Year Ended December 31, 2016 |  | Year Ended December 31, 2015
Attributable to Common Units |  |  |  |  |  |  |  |
Distributions (a) | $ | 328 |  |  | $ | 317 |  |  | $ | 156 |
Distributions in excess of net income | (293 | ) |  | (809 | ) |  | (112 | )
Limited partners' interest in net income (loss) | $ | 35 |  |  | $ | (492 | ) |  | $ | 44 |
Attributable to Subordinated Units |  |  |  |  |  |  |  |
Distributions (a) | $ | — |  |  | $ | — |  |  | $ | 23 |
Distributions in excess of net income | — |  |  | — |  |  | (12 | )
Limited partners' interest in net income | $ | — |  |  | $ | — |  |  | $ | 11 |
(a) Distributions declared per unit to unitholders as of record date | $ | 3.3020 |  |  | $ | 3.2938 |  |  | $ | 2.8851 |
Schedule of Incentive Distribution Rights to Limited Partners |
|  |  | Marginal percentage interest in distributions
| Total quarterly distribution per Common unit target amount |  | Common Unitholders |  | Holder of IDRs
Minimum Quarterly Distribution | $0.4375 |  | 100 | % |  | — |
First Target Distribution | Above $0.4375 up to $0.503125 |  | 100 | % |  | — |
Second Target Distribution | Above $0.503125 up to $0.546875 |  | 85 | % |  | 15 | %
Third Target Distribution | Above $0.546875 up to $0.656250 |  | 75 | % |  | 25 | %
Thereafter | Above $0.656250 |  | 50 | % |  | 50 | %
Distributions Made to Limited Partner, by Distribution | Cash distributions paid were as follows:
|  | Limited Partners |  |
Payment Date |  | Per Unit Distribution |  | Total Cash Distribution |  | Distribution to IDR Holders
|  | (in millions, except per unit amounts)
February 14, 2018 |  | $ | 0.8255 |  |  | $ | 82 |  |  | $ | 21 |
November 14, 2017 |  | $ | 0.8255 |  |  | $ | 82 |  |  | $ | 22 |
August 15, 2017 |  | $ | 0.8255 |  |  | $ | 82 |  |  | $ | 21 |
May 16, 2017 |  | $ | 0.8255 |  |  | $ | 82 |  |  | $ | 21 |
February 16, 2017 |  | $ | 0.8255 |  |  | $ | 81 |  |  | $ | 21 |
November 15, 2016 |  | $ | 0.8255 |  |  | $ | 79 |  |  | $ | 20 |
August 15, 2016 |  | $ | 0.8255 |  |  | $ | 79 |  |  | $ | 20 |
May 16, 2016 |  | $ | 0.8173 |  |  | $ | 78 |  |  | $ | 20 |
February 16, 2016 |  | $ | 0.8013 |  |  | $ | 70 |  |  | $ | 17 |
November 27, 2015 |  | $ | 0.7454 |  |  | $ | 47 |  |  | $ | 8 |
August 28, 2015 |  | $ | 0.6934 |  |  | $ | 29 |  |  | $ | 3 |
May 29, 2015 |  | $ | 0.6450 |  |  | $ | 23 |  |  | $ | 1 |
February 27, 2015 |  | $ | 0.6000 |  |  | $ | 21 |  |  | $ | 1 |

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