v3.25.4
Net Income Per Common Unit - Schedule of Computation of Basic and Diluted Net Income per Common Unit (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 12 Months Ended
Jan. 31, 2025
Dec. 31, 2025
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Continuing Operations:                        
Income from continuing operations, net of tax   $ 325 $ 453 $ 227 $ 380 $ 45 $ 198 $ 298 $ 341 $ 1,386 $ 882 $ 1,310
Net income attributable to noncontrolling interests                   (334) (341) (272)
Net income from continuing operations attributable to PAA                   1,052 541 1,038
Amounts allocated to participating securities                   (11) (10) (10)
Other                   4 5 5
Series A Preferred Units                        
Continuing Operations:                        
Distributions to preferred unitholders                   (146) (175) (173)
Impact from repurchase of Series A preferred units                   $ (43) $ 0 $ 0
Discontinued Operations:                        
Repurchase and cancellation (in units) 12,700,000                 12,678,560    
Series A Preferred Units | Weighted Average                        
Net Income Per Common Unit                        
Antidilutive securities excluded from computation of net income per common unit (in units)                   59,000,000 71,000,000 71,000,000
Series B Preferred Units                        
Continuing Operations:                        
Distributions to preferred unitholders                   $ (70) $ (78) $ (76)
Discontinued Operations:                        
Repurchase and cancellation (in units)                   0    
Common Units                        
Continuing Operations:                        
Net income allocated to common unitholders — Basic : Continuing operations                   $ 786 283 784
Net income allocated to common unitholders — Diluted: Continuing operations                   786 283 784
Discontinued Operations:                        
Net income allocated to common unitholders — Basic : Discontinued operations                   383 231 192
Net income allocated to common unitholders — Diluted : Discontinued operations                   383 231 192
Net income allocated to common unitholders — Basic                   1,169 514 976
Net income allocated to common unitholders — Diluted                   $ 1,169 $ 514 $ 976
Basic weighted average common units outstanding (in units)                   704,000,000 702,000,000 699,000,000
Diluted weighted average common units outstanding (in units)                   704,000,000 702,000,000 699,000,000
Diluted net income per common unit: continuing operations (usd per unit)   $ 0.26 $ 0.44 $ 0.11 $ 0.30 $ (0.15) $ 0.06 $ 0.21 $ 0.28 $ 1.12 $ 0.40 $ 1.12
Basic net income per common unit: continuing operations (usd per unit)   0.26 0.44 0.11 0.30 (0.15) 0.06 0.21 0.28 1.12 0.40 1.12
Diluted net income per common unit: discontinuing operations (usd per unit)   0.15 0.11 0.10 0.19 0.11 0.16 0.05 0.01 0.54 0.33 0.28
Basic net income per common unit: discontinuing operations (usd per unit)   0.15 0.11 0.10 0.19 0.11 0.16 0.05 0.01 0.54 0.33 0.28
Basic net income per common unit (usd per unit)   0.41 0.55 0.21 0.49 (0.04) 0.22 0.26 0.29 1.66 0.73 1.40
Diluted net income per common unit (usd per unit)   $ 0.41 $ 0.55 $ 0.21 $ 0.49 $ (0.04) $ 0.22 $ 0.26 $ 0.29 $ 1.66 $ 0.73 $ 1.40
Repurchase and cancellation (in units)                   0