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v3.19.3.a.u2

Partners' Capital and Distributions - Activity for Series A and B Preferred Units and Common Units (Details) - shares | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Series A Preferred Units |  |  |
Increase (Decrease) in Partners' Capital [Roll Forward] |  |  |
Balance, beginning of period (in units) | 71,090,468 |  |
Balance, end of period (in units) | 71,090,468 | 71,090,468 |
Series B Preferred Units |  |  |
Increase (Decrease) in Partners' Capital [Roll Forward] |  |  |
Balance, beginning of period (in units) | 800,000 |  |
Balance, end of period (in units) | 800,000 | 800,000 |
Common Units |  |  |
Increase (Decrease) in Partners' Capital [Roll Forward] |  |  |
Balance, beginning of period (in units) | 726,361,924 |  |
Sale of common units (in units) |  |  | 54,119,893
Balance, end of period (in units) | 728,028,576 | 726,361,924 |
Limited Partners | Series A Preferred Units |  |  |
Increase (Decrease) in Partners' Capital [Roll Forward] |  |  |
Balance, beginning of period (in units) | 71,090,468 | 69,696,542 | 64,388,853
Issuances of Series A preferred units in connection with in-kind distributions (in units) |  | 1,393,926 | 5,307,689
Balance, end of period (in units) | 71,090,468 | 71,090,468 | 69,696,542
Limited Partners | Series B Preferred Units |  |  |
Increase (Decrease) in Partners' Capital [Roll Forward] |  |  |
Balance, beginning of period (in units) | 800,000 | 800,000 |
Sale of Series B preferred units (in units) |  |  | 800,000
Balance, end of period (in units) | 800,000 | 800,000 | 800,000
Limited Partners | Common Units |  |  |
Increase (Decrease) in Partners' Capital [Roll Forward] |  |  |
Balance, beginning of period (in units) | 726,361,924 | 725,189,138 | 669,194,419
Sale of common units (in units) |  |  | 54,119,893
Issuance of common units in connection with acquisition of interest in Advantage Joint Venture (Note 7) (in units) |  |  | 1,252,269
Issuance of common units under equity-indexed compensation plans (in units) | 1,666,652 | 1,172,786 | 622,557
Balance, end of period (in units) | 728,028,576 | 726,361,924 | 725,189,138

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