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Partners' Capital and Distributions (Tables) | 6 Months Ended
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Jun. 30, 2018
Limited Partners' Capital Account [Line Items] |
Schedule of activity for preferred units and common units | The following tables present the activity for our preferred and common units:
| Limited Partners
| Series A Preferred Units |  | Series B Preferred Units |  | Common Units
Outstanding at December 31, 2017 | 69,696,542 |  |  | 800,000 |  |  | 725,189,138 |
Issuance of Series A preferred units in connection with in-kind distribution | 1,393,926 |  |  | — |  |  | — |
Other | — |  |  | — |  |  | 393,601 |
Outstanding at June 30, 2018 | 71,090,468 |  |  | 800,000 |  |  | 725,582,739 |
| Limited Partners
| Series A Preferred Units |  | Common Units
Outstanding at December 31, 2016 | 64,388,853 |  |  | 669,194,419 |
Issuances of Series A preferred units in connection with in-kind distributions | 2,601,300 |  |  | — |
Sales of common units | — |  |  | 54,119,893 |
Issuance of common units in connection with acquisition of interest in Advantage Joint Venture | — |  |  | 1,252,269 |
Other | — |  |  | 130,154 |
Outstanding at June 30, 2017 | 66,990,153 |  |  | 724,696,735 |
Series A Preferred Units |
Limited Partners' Capital Account [Line Items] |
Schedule of cash distributions to common unitholders | The following table details distributions paid to our Series A preferred unitholders during or pertaining to the first six months of 2018 (in millions, except unit and per unit data):
|  | Series A Preferred Unitholders
|  | Distribution (2) |  |  | Distribution per Unit
Distribution Payment Date |  | Cash |  | Units |  |
August 14, 2018 (1) |  | $ | 37 |  |  | — |  |  |  | $ | 0.525 |
May 15, 2018 |  | $ | 37 |  |  | — |  |  |  | $ | 0.525 |
February 14, 2018 |  | $ | — |  |  | 1,393,926 |  |  |  | $ | 0.525 |
(1) | Payable to unitholders of record at the close of business on July 31, 2018 for the period from April 1, 2018 through June 30, 2018. At June 30, 2018, such amount was accrued to distributions payable in “Accounts payable and accrued liabilities” on our Condensed Consolidated Balance Sheet.
(2) | On February 14, 2018, we issued additional Series A preferred units in lieu of a cash distribution of $37 million. With respect to any quarter ending on or prior to December 31, 2017 (the “Initial Distribution Period”), we were able to elect to pay distributions on our Series A preferred units in additional Series A preferred units, in cash or a combination of both. The Initial Distribution Period ended with the February 2018 distribution; as such, with respect to any quarter ending after the Initial Distribution Period, we must pay distributions on our Series A preferred units in cash.
Series B Preferred Units |
Limited Partners' Capital Account [Line Items] |
Schedule of cash distributions to common unitholders | The following table details distributions paid to our Series B preferred unitholders during the first six months of 2018 (in millions, except per unit data):
|  | Series B Preferred Unitholders
Distribution Payment Date |  | Cash Distribution |  |  | Distribution per Unit
May 15, 2018 |  | $ | 24.5 |  |  |  | $ | 30.625 |
Common Units |
Limited Partners' Capital Account [Line Items] |
Schedule of cash distributions to common unitholders | The following table details distributions paid during or pertaining to the first six months of 2018 (in millions, except per unit data):
|  | Distributions |  |  | Cash Distribution per Common Unit
|  | Common Unitholders |  | Total Cash Distribution |  |
Distribution Payment Date |  | Public |  | AAP |  |  |
August 14, 2018 (1) |  | $ | 133 |  |  | $ | 85 |  |  | $ | 218 |  |  |  | $ | 0.30 |
May 15, 2018 |  | $ | 133 |  |  | $ | 85 |  |  | $ | 218 |  |  |  | $ | 0.30 |
February 14, 2018 |  | $ | 133 |  |  | $ | 85 |  |  | $ | 218 |  |  |  | $ | 0.30 |
(1) | Payable to unitholders of record at the close of business on July 31, 2018 for the period from April 1, 2018 through June 30, 2018.

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