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Operating Segments - Segment Adjusted EBITDA Reconciliation (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Segment Reporting, Reconciling Item from Segments to Consolidated [Line Items] |  |  |  |
Segment Adjusted EBITDA | $ 523 | $ 782 | $ 1,316 | $ 1,643
Adjustments: |  |  |  |
Depreciation and amortization of unconsolidated entities | (16) | (14) | (33) | (27)
Gains/(losses) from derivative activities, net of inventory valuation adjustments | (90) | (44) | (121) | 30
Long-term inventory costing adjustments | 51 | (25) | (64) | (4)
Deficiencies under minimum volume commitments, net | (7) | (1) | (6) | 7
Equity-indexed compensation expense | (5) | (4) | (8) | (7)
Net gain/(loss) on foreign currency revaluation |  | (7) | 13 | (12)
Significant acquisition-related expenses |  |  | (3) |
Unallocated general and administrative expenses | (74) | (76) | (144) | (154)
Depreciation and amortization | (166) | (148) | (335) | (284)
Gains/(losses) on asset sales and asset impairments, net | 1 | 4 | (618) | 0
Goodwill impairment losses | 0 |  | (2,515) |
Gain on/(impairment of) investments in unconsolidated entities, net | (69) |  | (91) | 267
Interest expense, net | (108) | (103) | (215) | (203)
Other income/(expense), net | 18 | (6) | (13) | 18
INCOME/(LOSS) BEFORE TAX | 130 | 423 | (2,696) | 1,415
Income tax (expense)/benefit | 7 | 3 | 140 | (75)
NET INCOME/(LOSS) | 137 | 426 | (2,556) | 1,340
Net (income)/loss attributable to noncontrolling interests | (121) | (360) | 1,991 | (1,127)
NET INCOME/(LOSS) ATTRIBUTABLE TO PAGP | 16 | 66 | (565) | 213
Line 901 Incident |  |  |  |
Adjustments: |  |  |  |
Line 901 incident |  | (10) |  | (10)
Unallocated |  |  |  |
Adjustments: |  |  |  |
Unallocated general and administrative expenses | $ (2) | $ (1) | $ (3) | $ (3)

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- Definition 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. + References No definition available. + Details
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- Definition Amount of gain (loss) (i) from remeasurement to fair value of retained investment in former subsidiary and group of assets constituting business activity deconsolidated and derecognized and/or (ii) on sale or disposal of an equity method investment and/or (iii) impairment of investment in unconsolidated entity. + References No definition available. + Details
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- Definition Gains (losses) related to derivative instruments for which the underlying transaction does not occur in the current period and on derivatives that are related to investing activities, such as the purchase of linefill. Also includes the impact of corresponding inventory valuation adjustments, as applicable. + References No definition available. + Details
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- Definition Includes the impact of changes (resulting from fluctuations in market prices) in the average cost of crude oil and NGL inventory that is comprised of minimum working inventory requirements in third-party assets and other working inventory that is needed for the entity’s commercial operations which is considered necessary to conduct the entity’s operations and which the entity intends to carry for the foreseeable future, as well as writedowns of such inventory that result from price declines. + References No definition available. + Details
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- Definition Revenues and equity earnings in unconsolidated entities less (a) purchases and related costs, (b) field operating costs and (c) segment general and administrative expenses, plus the entity’s proportionate share of the depreciation and amortization expense and gains and losses on significant asset sales of unconsolidated entities, and further adjusted for certain selected items including (i) gains or losses on derivative on derivative instruments that are related to underlying activities in another period (or the reversal of such adjustments from a prior period), gains and losses on derivatives that are related to investing activities (such as the purchase of linefill) and inventory valuation adjustments, as applicable, (ii) long-term inventory costing adjustments, (iii) charges for obligations that are expected to be settled with the issuance of equity instruments, (iv) amounts related to deficiencies associated with minimum volume commitments, net of applicable amounts subsequently recognized into revenue and (v) other items that the Chief Operating Decision Maker believes are integral to understand the entity’s core segment operating performance. + References No definition available. + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=116868678&loc=d3e1043-128460 + Details
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