CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 1,425	$ 1,163	$ 600
Other comprehensive income/(loss)	118	(101)	65
Comprehensive income	1,543	1,062	665
Comprehensive income attributable to noncontrolling interests	(1,312)	(922)	(588)
Comprehensive income attributable to PAGP	$ 231	$ 140	$ 77