CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME/(LOSS) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income/(loss)	$ 251	$ (216)	$ 476	$ 207
Other comprehensive income/(loss)	(52)		22	108
Comprehensive income/(loss)	199	(216)	498	315
Comprehensive income attributable to noncontrolling interests	(48)	(4)	(86)	(5)
Comprehensive income/(loss) attributable to PAA	$ 151	$ (220)	$ 412	$ 310