v3.26.1
Net Income Per Class A Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Basic Net Income per Class A Share        
Net income/(loss) attributable to PAGP from continuing operations $ (74) $ 10 $ (26) $ 56
Net income attributable to PAGP from discontinued operations 463 20 434 58
Diluted Net Income/(Loss) per Class A Share:        
Incremental net income attributable to PAGP resulting from assumed exchange of AAP Management Units 0   0 8
Net income attributable to PAGP from discontinued operations including incremental net income from assumed exchange of AAP Management Units $ 463 $ 20 $ 434 $ 66
Class A Shareholders        
Basic Net Income per Class A Share        
Basic weighted average Class A shared outstanding (in shares) 198 198 198 198
Basic Net Income/(Loss) per Class A Share:        
Continuing operations, basic (usd per share) $ (0.37) $ 0.05 $ (0.13) $ 0.29
Discontinued operations, basic (usd per share) 2.34 0.10 2.19 0.29
Basic Net Income per Class A Share (usd per share) $ 1.97 $ 0.15 $ 2.06 $ 0.58
Diluted Net Income/(Loss) per Class A Share:        
Dilutive shares resulting from assumed exchange of AAP Management Units 0   0 35
Diluted weighted average Class A shares outstanding (in shares) 198 198 198 233
Diluted Net Income/(Loss) per Class A Share:        
Continuing operations, diluted (usd per share) $ (0.37) $ 0.05 $ (0.13) $ 0.29
Discontinued operations, diluted (usd per share) 2.34 0.10 2.19 0.28
Diluted net income per Class A Share (usd per share) $ 1.97 $ 0.15 $ 2.06 $ 0.57
Weighted Average | AAP Units | Held-for-Sale | NGL Business        
Basic and Diluted Net Income Per Common Unit [Line Items]        
Antidilutive securities excluded from computation of net income per common unit (in shares) 35 35 35 35