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Partners' Capital and Distributions (Tables) | 12 Months Ended
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Dec. 31, 2021
Partners Capital and Distribution [Line Items] |
Activity for preferred and common units | The following table presents the activity for our preferred and common units:
| Limited Partners
| Series A Preferred Units |  | Series B Preferred Units |  | Common Units
Outstanding at December 31, 2018 | 71,090,468 |  |  | 800,000 |  |  | 726,361,924 |
Issuances of common units under equity-indexed compensation plans | — |  |  | — |  |  | 1,666,652 |
Outstanding at December 31, 2019 | 71,090,468 |  |  | 800,000 |  |  | 728,028,576 |
Repurchase and cancellation of common units under the Common Equity Repurchase Program | — |  |  | — |  |  | (6,222,748) |
Issuances of common units under equity-indexed compensation plans | — |  |  | — |  |  | 574,588 |
Outstanding at December 31, 2020 | 71,090,468 |  |  | 800,000 |  |  | 722,380,416 |
Repurchase and cancellation of common units under the Common Equity Repurchase Program | — |  |  | — |  |  | (18,061,583) |
Issuances of common units under equity-indexed compensation plans | — |  |  | — |  |  | 672,707 |
Outstanding at December 31, 2021 | 71,090,468 |  |  | 800,000 |  |  | 704,991,540 |
Series A Preferred Units |
Partners Capital and Distribution [Line Items] |
Schedule of distributions paid | The following table details distributions paid to our preferred unitholders during the years presented (in millions, except unit data):
|  | Cash Distributions
Year |  | Series A Preferred Unitholders |  |  | Series B Preferred Unitholders
2021 |  | $ | 149 |  |  |  |  |  | $ | 49 |
2020 |  | $ | 149 |  |  |  |  |  | $ | 49 |
2019 |  | $ | 149 |  |  |  |  |  | $ | 49 |
Series B Preferred Units |
Partners Capital and Distribution [Line Items] |
Schedule of distributions paid | The following table details distributions paid to our preferred unitholders during the years presented (in millions, except unit data):
|  | Cash Distributions
Year |  | Series A Preferred Unitholders |  |  | Series B Preferred Unitholders
2021 |  | $ | 149 |  |  |  |  |  | $ | 49 |
2020 |  | $ | 149 |  |  |  |  |  | $ | 49 |
2019 |  | $ | 149 |  |  |  |  |  | $ | 49 |
Common Units |
Partners Capital and Distribution [Line Items] |
Schedule of distributions paid | The following table details distributions paid to common unitholders during the years presented (in millions, except per unit data):
|  | Distributions Paid |  |  | Distributions per common unit
Year |  | Public |  | AAP |  | Total |  |
2021 |  | $ | 341 |  |  | $ | 176 |  |  | $ | 517 |  |  |  | $ | 0.72 |
2020 |  | $ | 432 |  |  | $ | 223 |  |  | $ | 655 |  |  |  | $ | 0.90 |
2019 |  | $ | 632 |  |  | $ | 372 |  |  | $ | 1,004 |  |  |  | $ | 1.38 |

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