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Net Income Per Common Unit (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Basic and Diluted Net Income per Common Unit |  |  |
Net income attributable to PAA | $ 1,230 | $ 1,037 | $ 593
Amounts allocated to participating securities | (10) | (5) | (2)
Other | 5 |  |
Net income allocated to common unitholders — Basic | 976 | 831 | 393
Net income allocated to common unitholders — Diluted | 976 | 831 | 393
Series A Preferred Units |  |  |
Basic and Diluted Net Income per Common Unit |  |  |
Distributions to preferred unitholders | $ (173) | $ (149) | $ (149)
Series A Preferred Units | Weighted Average |  |  |
Net Income Per Common Unit |  |  |
Antidilutive securities excluded from computation of net income per common unit (in units) | 71 | 71 | 71
Series B Preferred Units |  |  |
Basic and Diluted Net Income per Common Unit |  |  |
Distributions to preferred unitholders | $ (76) | $ (52) | $ (49)
Common Units |  |  |
Basic and Diluted Net Income per Common Unit |  |  |
Basic weighted average common units outstanding (in units) | 699 | 701 | 716
Diluted weighted average common units outstanding (in units) | 699 | 701 | 716
Basic net income per common unit (in dollars per unit) | $ 1.40 | $ 1.19 | $ 0.55
Diluted net income per common unit (in dollars per unit) | $ 1.40 | $ 1.19 | $ 0.55

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