v3.25.1
Net Income Per Class A Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Basic and Diluted Net Income per Class A Share    
Net income attributable to PAGP $ 84 $ 42
Class A Shares    
Basic and Diluted Net Income per Class A Share    
Basic weighted average Class A shares outstanding (shares) 198 197
Diluted weighted average Class A shares outstanding (shares) 198 197
Basic net income per Class A share (usd per share) $ 0.42 $ 0.21
Diluted net income per Class A share (usd per share) $ 0.42 $ 0.21
Weighted Average | AAP Units    
Basic and Diluted Net Income Per Share    
Antidilutive securities excluded from computation of earnings per share (shares) 35 36