Segment Information - Reconciliation of Segment Adjusted EBITDA (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment Adjusted EBITDA	$ 2,685	$ 2,504	$ 2,194
Adjustments:
Depreciation and amortization of unconsolidated entities	(87)	(85)	(123)
Derivative activities and inventory valuation adjustments	(159)	280	271
Long-term inventory costing adjustments	(35)	4	94
Deficiencies under minimum volume commitments, net	(12)	(7)	7
Equity-indexed compensation expense	(36)	(32)	(19)
Foreign currency revaluation	(24)	(4)	4
Transaction-related expenses	(1)		(16)
Segment amounts attributable to noncontrolling interests in consolidated joint ventures	454	364	94
Unallocated general and administrative expenses	(356)	(330)	(298)
Depreciation and amortization	(1,051)	(968)	(777)
Gains/(losses) on asset sales and asset impairments, net	152	(269)	(592)
Gains/(losses) on investments in unconsolidated entities, net	28	346	2
Interest expense, net	(386)	(405)	(425)
Other income/(expense), net	102	(219)	19
INCOME BEFORE TAX	1,614	1,409	712
Income tax expense	(189)	(246)	(112)
Net income	1,425	1,163	600
Net income attributable to noncontrolling interests	(1,227)	(995)	(540)
Net income attributable to PAGP	198	168	60
Unallocated
Adjustments:
Unallocated general and administrative expenses	(6)	(5)	(6)
Line 901 Incident
Adjustments:
Line 901 incident	$ (10)	$ (95)	$ (15)

Includes the impact of amounts billed to counterparties for their deficiency obligation, net of applicable amounts subsequently recognized into revenue. Certain agreements require counterparties to deliver, transport or throughput a minimum volume over an agreed upon period. Substantially all of such agreements were entered into with counterparties to economically support the return on the reporting entity's capital expenditure necessary to construct the related asset. Some of these agreements include make-up rights if the minimum volume is not met. A receivable from the counterparty is recorded in the period that services are provided or when the transaction occurs, including amounts for deficiency obligations from counterparties associated with minimum volume commitments. If a counterparty has a make-up right associated with a deficiency, the revenue attributable to the counterparty’s make-up right is deferred and is subsequently recognized at the earlier of when the deficiency volume is delivered or shipped, when the make-up right expires or when it is determined that the counterparty’s ability to utilize the make-up right is remote.

No definition available.