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Segment Information
 3 Months Ended
Mar. 31, 2024
Segment Reporting [Abstract]  
Segment Reporting Disclosure Segment Information
MPLX’s chief operating decision maker (“CODM”) is the chief executive officer of its general partner. The CODM reviews MPLX’s discrete financial information, makes operating decisions, assesses financial performance and allocates resources on a type of service basis. MPLX has two reportable segments: L&S and G&P. Each of these segments is organized and managed based upon the nature of the products and services it offers.
•L&S – gathers, transports, stores and distributes crude oil, refined products, other hydrocarbon-based products and renewables. Also includes the operation of refining logistics, fuels distribution and inland marine businesses, terminals, rail facilities, and storage caverns.
•G&P – gathers, processes and transports natural gas; and transports, fractionates, stores and markets NGLs.
Our CODM evaluates the performance of our segments using Segment Adjusted EBITDA. Amounts included in net income and excluded from Segment Adjusted EBITDA include: (i) depreciation and amortization; (ii) net interest and other financial costs; (iii) income/(loss) from equity method investments; (iv) distributions and adjustments related to equity method investments; (v) impairment expense; (vi) noncontrolling interests; and (vii) other adjustments, as applicable. These items are either: (i) believed to be non-recurring in nature; (ii) not believed to be allocable or controlled by the segment; or (iii) are not tied to the operational performance of the segment. Assets by segment are not a measure used to assess the performance of the Partnership by our CODM and thus are not reported in our disclosures.
The tables below present information about revenues and other income, Segment Adjusted EBITDA, capital expenditures and investments in unconsolidated affiliates for our reportable segments:
Three Months Ended 
March 31,
(In millions)20242023
L&S
Service revenue$1,067 $1,033 
Rental income224 212 
Product related revenue5 5 
Sales-type lease revenue121 125 
Income from equity method investments89 71 
Other income50 14 
Total segment revenues and other income(1)
1,556 1,460 
Segment Adjusted EBITDA(2)
1,098 1,026 
Capital expenditures84 68 
Investments in unconsolidated affiliates(3)
92 15 
G&P
Service revenue577 525 
Rental income53 51 
Product related revenue523 564 
Sales-type lease revenue 34 34 
Income from equity method investments68 63 
Other income35 16 
Total segment revenues and other income(1)
1,290 1,253 
Segment Adjusted EBITDA(2)
537 493 
Capital expenditures126 123 
Investments in unconsolidated affiliates$27 $36 
(1)    Within the total segment revenues and other income amounts presented above, third party revenues for the L&S segment were $207 million and $170 million for the three months ended March 31, 2024 and March 31, 2023, respectively. Third party revenues for the G&P segment were $1,212 million and $1,166 million for the three months ended March 31, 2024 and March 31, 2023, respectively.
(2)    See below for the reconciliation from Segment Adjusted EBITDA to Net income.
(3)    The three months ended March 31, 2024 includes a contribution of $92 million to Dakota Access to fund our share of a debt repayment by the joint venture.
The table below provides a reconciliation of Segment Adjusted EBITDA for reportable segments to Net income.
Three Months Ended 
March 31,
(In millions)20242023
Reconciliation to Net income:
L&S Segment Adjusted EBITDA$1,098 $1,026 
G&P Segment Adjusted EBITDA537 493 
Total reportable segments1,635 1,519 
Depreciation and amortization(1)
(317)(296)
Net interest and other financial costs(235)(243)
Income from equity method investments157 134 
Distributions/adjustments related to equity method investments(200)(153)
Adjusted EBITDA attributable to noncontrolling interests11 10 
Other(2)
(36)(19)
Net income$1,015 $952 
(1)    Depreciation and amortization attributable to L&S was $130 million and $129 million for the three months ended March 31, 2024 and March 31, 2023, respectively. Depreciation and amortization attributable to G&P was $187 million and $167 million for the three months ended March 31, 2024 and March 31, 2023, respectively.
(2)    Includes unrealized derivative gain/(loss), equity-based compensation, provision for income taxes, and other miscellaneous items.