CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME/(LOSS) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income/(loss)	$ (2,845)	$ 970
Other comprehensive income/(loss)	(327)	58
Comprehensive income/(loss)	(3,172)	1,028
Comprehensive income attributable to noncontrolling interests	(2)
Comprehensive income/(loss) attributable to PAA	$ (3,174)	$ 1,028