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Partners' Capital and Distributions - Units Outstanding (Details) - shares | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2023 | Jun. 30, 2022 | Mar. 31, 2022 | Jun. 30, 2023
Series A Preferred Units |  |  |  |
Activity for preferred units and common units |  |  |  |
Outstanding, beginning of period (units) | 71,090,468 | 71,090,468 | 71,090,468 | 71,090,468
Outstanding, end of period (units) | 71,090,468 | 71,090,468 | 71,090,468 | 71,090,468
Series B Preferred Units |  |  |  |
Activity for preferred units and common units |  |  |  |
Outstanding, beginning of period (units) | 800,000 | 800,000 | 800,000 | 800,000
Outstanding, end of period (units) | 800,000 | 800,000 | 800,000 | 800,000
Common Units |  |  |  |
Activity for preferred units and common units |  |  |  |
Outstanding, beginning of period (units) | 698,354,498 | 702,668,178 | 704,991,540 | 698,354,498
Repurchase and cancellation of common units under the Common Equity Repurchase Program (units) |  | (4,876,062) | (2,375,299) |
Issuances of common units under equity-indexed compensation plans (units) | 35,508 | 147,830 | 51,937 | 35,508
Outstanding, end of period (units) | 698,390,006 | 697,939,946 | 702,668,178 | 698,390,006

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- Definition Number of units issued for unit-based payment arrangement issued by partnership. Partner includes, but is not limited to, general, limited and preferred partners. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480008/505-10-S99-1 + Details
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