CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 283	$ 316	$ 775	$ 653
Other comprehensive income/(loss)	187	(33)	192	(104)
Comprehensive income	470	283	967	549
Comprehensive income attributable to noncontrolling interests	(387)	(253)	(799)	(497)
Comprehensive income attributable to PAGP	$ 83	$ 30	$ 168	$ 52