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Net Income/(Loss) Per Class A Share (Tables)
6 Months Ended
Jun. 30, 2022
Earnings Per Share [Abstract]  
Calculation of basic and diluted net income/(loss) per Class A share
The following table sets forth the computation of basic and diluted net income/(loss) per Class A share (in millions, except per share data):

 Three Months Ended
June 30,
Six Months Ended
June 30,
 2022202120222021
Basic and Diluted Net Income/(Loss) per Class A Share  
Net income/(loss) attributable to PAGP$31 $(69)$53 $
Basic and diluted weighted average Class A shares outstanding194 194 194 194 
Basic and diluted net income/(loss) per Class A share$0.16 $(0.35)$0.27 $—