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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME/(LOSS) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Statement of Comprehensive Income [Abstract]    
Net income/(loss) $ 423 $ (2,845)
Other comprehensive income (loss) 108 (327)
Comprehensive income/(loss) 531 (3,172)
Comprehensive income attributable to noncontrolling interests (1) (2)
Comprehensive income/(loss) attributable to PAA $ 530 $ (3,174)