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Net Income Per Common Unit (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Basic and Diluted Net Income per Common Unit |  |
Net income attributable to PAA | $ 266 | $ 422
Amounts allocated to participating securities | (1) | (2)
Other | 1 | 1
Net income allocated to common unitholders - Basic | 203 | 361
Net income allocated to common unitholders - Diluted | 203 | 361
Series A Preferred Units |  |
Basic and Diluted Net Income per Common Unit |  |
Distributions to preferred unitholders | $ (44) | $ (42)
Series A Preferred Units | Weighted Average |  |
Net Income/(Loss) Per Common Unit |  |
Antidilutive securities excluded from computation of net income per common unit (units) | 71 | 71
Series B Preferred Units |  |
Basic and Diluted Net Income per Common Unit |  |
Distributions to preferred unitholders | $ (19) | $ (18)
Common Units |  |
Basic and Diluted Net Income per Common Unit |  |
Basic weighted average common units outstanding (units) | 701 | 698
Diluted weighted average common units outstanding (units) | 701 | 698
Basic net income per common unit (usd per unit) | $ 0.29 | $ 0.52
Diluted net income per common unit (usd per unit) | $ 0.29 | $ 0.52

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