v3.26.1
Net Income Per Common Unit (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Jan. 31, 2025
Mar. 31, 2026
Mar. 31, 2025
Basic and Diluted Net Income/(Loss) per Common Unit      
Income from continuing operations, net of tax   $ 334 $ 380
Net income attributable to noncontrolling interests   (79) (73)
Net income from continuing operations attributable to PAA   255 307
Amounts allocated to participating securities   (1) (1)
Other   1 1
Series A Preferred Units      
Basic and Diluted Net Income/(Loss) per Common Unit      
Distributions to preferred unitholders   (36) (39)
Impact from repurchase of Series A preferred units   0 $ (43)
Repurchase and cancellation (in units) 12,700,000   12,678,560
Series B Preferred Units      
Basic and Diluted Net Income/(Loss) per Common Unit      
Distributions to preferred unitholders   (16) $ (18)
Repurchase and cancellation (in units)     0
Common Units      
Basic and Diluted Net Income/(Loss) per Common Unit      
Net income from continuing operations allocated to common unitholders - basic   203 $ 207
Net income from continuing operations allocated to common unitholders - diluted   203 207
Net income/(loss) from discontinued operations allocated to common unitholders - basic   (103) 136
Net income/(loss) from discontinued operations allocated to common unitholders - diluted   (103) 136
Net income allocated to common unitholders - basic   100 343
Net income allocated to common unitholders - diluted   $ 100 $ 343
Basic weighted average common units outstanding (units)   706,000,000 704,000,000
Diluted weighted average common units outstanding (units)   706,000,000 704,000,000
Basic net income/(loss) per common unit: continuing operations (usd per unit)   $ 0.29 $ 0.30
Diluted net income/(loss) per common unit: continuing operations (usd per unit)   0.29 0.30
Basic net income per common unit: discontinuing operations (usd per unit)   (0.15) 0.19
Diluted net income per common unit: discontinuing operations (usd per unit)   (0.15) 0.19
Basic net income per common unit (usd per unit)   0.14 0.49
Diluted net income per common unit (usd per unit)   $ 0.14 $ 0.49
Repurchase and cancellation (in units)     0
Weighted Average | Series A Preferred Units      
Basic and Diluted Net Income Per Common Unit [Line Items]      
Antidilutive securities excluded from computation of net income per common unit (units)   58,000,000 63,000,000