Document and Entity Information
Document and Entity Information - shares | 6 Months Ended | |
Jun. 30, 2018 | Aug. 01, 2018 | |
Document Information [Line Items] | ||
Document Type | 10-Q | |
Amendment Flag | false | |
Document Period End Date | Jun. 30, 2018 | |
Document Fiscal Year Focus | 2,018 | |
Document Fiscal Period Focus | Q1 | |
Trading Symbol | MPLX | |
Entity Registrant Name | MPLX LP | |
Entity Central Index Key | 1,552,000 | |
Current Fiscal Year End Date | --12-31 | |
Entity Filer Category | Large Accelerated Filer | |
Common Units [Member] | ||
Document Information [Line Items] | ||
Entity Common Stock, Shares Outstanding | 794,032,738 | |
General Partner Units | ||
Document Information [Line Items] | ||
Entity Common Stock, Shares Outstanding | 0 |
Consolidated Statements of Inco
Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions | 3 Months Ended | 6 Months Ended | |||||||
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | ||||||
Revenues and other income: | |||||||||
Total revenues from contracts with customers | $ 1,231 | $ 2,338 | |||||||
Rental income | 84 | $ 70 | 163 | $ 139 | |||||
Rental income - related parties | 190 | 70 | 335 | 137 | |||||
Income from equity method investments | 50 | 1 | 111 | [1] | 6 | [1] | |||
Other income | 1 | 1 | 5 | 4 | |||||
Other income - related parties | 24 | 25 | 47 | 47 | |||||
Total revenues and other income | 1,578 | 916 | 2,998 | 1,802 | |||||
Costs and expenses: | |||||||||
Rental cost of sales | 33 | 13 | 62 | 25 | |||||
Rental cost of sales - related parties | 0 | 1 | 1 | 1 | |||||
Purchases - related parties | 223 | 109 | 400 | 216 | |||||
Depreciation and amortization | 188 | 164 | 364 | 351 | |||||
General and administrative expenses | 72 | 57 | 141 | 115 | |||||
Other taxes | 17 | 13 | 35 | 26 | |||||
Total costs and expenses | 970 | 636 | 1,833 | 1,257 | |||||
Income from operations | 608 | 280 | 1,165 | 545 | |||||
Related party interest and other financial costs | 1 | 0 | 2 | 0 | |||||
Interest expense (net of amounts capitalized of $9 million, $11 million, $18 million, and $18 million, respectively) | 135 | 74 | 247 | 140 | |||||
Other financial costs | 15 | 13 | 32 | 25 | |||||
Income before income taxes | 457 | 193 | 884 | 380 | |||||
Provision for income taxes | 1 | 2 | 5 | 2 | |||||
Net income | 456 | 191 | 879 | 378 | |||||
Less: Net income (loss) attributable to noncontrolling interest | 3 | 1 | 5 | 2 | |||||
Less: Net income attributable to Predecessor | 0 | 0 | 0 | 36 | |||||
Net income (loss) attributable to MPLX LP | 453 | [2] | 190 | [2] | 874 | 340 | [2] | ||
Less: Preferred unit distributions | 20 | 17 | 36 | 33 | |||||
Less: General partner’s GP interest in net income attributable to MPLX LP | 0 | 74 | 0 | 136 | |||||
Limited partners' interest in net income (loss) attributable to MPLX LP | $ 433 | $ 99 | 838 | $ 171 | |||||
Weighted average limited partner units outstanding: | |||||||||
Common - basic (in shares) | 825 | 416 | 409 | ||||||
Common - diluted (in shares) | 825 | 421 | 413 | ||||||
Limited Partners Common Units | |||||||||
Costs and expenses: | |||||||||
Net income (loss) attributable to MPLX LP | [2] | $ 433 | $ 99 | $ 838 | $ 171 | ||||
Net income (loss) attributable to MPLX LP per limited partner unit: | |||||||||
Common - basic (in USD per unit) | $ 0.55 | $ 0.26 | $ 1.15 | $ 0.46 | |||||
Common - diluted (in USD per unit) | $ 0.55 | $ 0.26 | $ 1.15 | $ 0.46 | |||||
Weighted average limited partner units outstanding: | |||||||||
Common - basic (in shares) | 794 | 377 | 728 | 370 | |||||
Common - diluted (in shares) | 794 | 382 | 728 | 374 | |||||
Cash distributions declared per limited partner common unit | $ 0.6275 | $ 0.5625 | $ 1.2450 | $ 1.1025 | |||||
Service [Member] | |||||||||
Revenues and other income: | |||||||||
Total revenues from contracts with customers | $ 410 | $ 286 | $ 792 | $ 546 | |||||
Revenue from Contract with Customer, Excluding Assessed Tax, Related Parties | 549 | 270 | 1,020 | 525 | |||||
Service, Other [Member] | |||||||||
Revenues and other income: | |||||||||
Total revenues from contracts with customers | 51 | 0 | 95 | 0 | |||||
Product [Member] | |||||||||
Revenues and other income: | |||||||||
Total revenues from contracts with customers | 206 | 191 | 413 | 394 | |||||
Revenue from Contract with Customer, Excluding Assessed Tax, Related Parties | 13 | 2 | 17 | 4 | |||||
Oil and Gas, Refining and Marketing [Member] | |||||||||
Revenues and other income: | |||||||||
Cost of Goods and Services Sold | 233 | 139 | [3] | 439 | [3] | 252 | [3] | ||
Natural Gas, Midstream [Member] | |||||||||
Revenues and other income: | |||||||||
Cost of Goods and Services Sold | $ 204 | $ 140 | $ 391 | $ 271 | |||||
[1] | “Income/(loss) from equity method investments” includes the impact of any basis differential amortization or accretion. | ||||||||
[2] | Allocation of net income attributable to MPLX LP assumes all earnings for the period had been distributed based on the current period distribution priorities. | ||||||||
[3] | Excludes “Purchased product costs,” “Rental cost of sales,” “Purchases,” “Depreciation and amortization,” “General and administrative expenses,” and “Other taxes.” |
Consolidated Statements of Inc3
Consolidated Statements of Income (Parenthetical) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | ||
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | |
Income Statement [Abstract] | ||||
Interest costs capitalized | $ 9 | $ 11 | $ 18 | $ 18 |
Consolidated Statements of Comp
Consolidated Statements of Comprehensive Income - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | ||
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | |
Statement of Comprehensive Income [Abstract] | ||||
Net income | $ 456 | $ 191 | $ 879 | $ 378 |
Other comprehensive income (loss), net of tax: | ||||
Remeasurements of pension and other postretirement benefits related to equity method investments, net of tax | 0 | 0 | (2) | 0 |
Comprehensive income | 456 | 191 | 877 | 378 |
Less comprehensive income attributable to: | ||||
Noncontrolling interests | 3 | 1 | 5 | 2 |
Income attributable to Predecessor | 0 | 0 | 0 | 36 |
Comprehensive income attributable to MPLX LP | $ 453 | $ 190 | $ 872 | $ 340 |
Consolidated Balance Sheets
Consolidated Balance Sheets - USD ($) $ in Millions | Jun. 30, 2018 | Dec. 31, 2017 | |
Current assets: | |||
Cash and cash equivalents | $ 3 | $ 5 | |
Receivables, net | 363 | 292 | |
Receivables - related parties | 294 | 160 | |
Inventories | 73 | 65 | |
Other current assets | 41 | 37 | |
Total current assets | 774 | 559 | |
Equity method investments | 4,042 | 4,010 | |
Property, plant and equipment, net | 13,642 | 12,187 | |
Intangibles, net | 435 | 453 | |
Goodwill | 2,460 | 2,245 | |
Long-term receivables - related parties | 22 | 20 | |
Other noncurrent assets | 37 | 26 | |
Total assets | 21,412 | 19,500 | |
Current liabilities: | |||
Accounts payable | 172 | 151 | |
Payables - related parties | 273 | 516 | |
Deferred revenue - related parties | 41 | 43 | |
Accrued interest payable | 183 | 88 | |
Other current liabilities | 610 | 506 | |
Total current liabilities | 1,279 | 1,304 | |
Long-term deferred revenue | 58 | 42 | |
Long-term deferred revenue - related parties | 47 | 43 | |
Long-term debt | 11,874 | 6,945 | |
Deferred income taxes | 11 | 5 | |
Deferred credits and other liabilities | 188 | 188 | |
Total liabilities | 13,457 | 8,527 | |
Commitments and contingencies (see Note 20) | |||
Redeemable preferred units | 1,003 | 1,000 | |
Equity | |||
Total MPLX LP partners’ capital | 6,802 | 9,827 | |
Accumulated other comprehensive loss | [1] | (16) | (14) |
Noncontrolling interests | 150 | 146 | |
Total equity | 6,952 | 9,973 | |
Total liabilities, preferred units and equity | 21,412 | 19,500 | |
MPC | |||
Current assets: | |||
Receivables - related parties | 286 | 153 | |
Long-term receivables - related parties | 22 | 20 | |
Current liabilities: | |||
Payables - related parties | 239 | 470 | |
Limited Partners Common Units | Public | |||
Equity | |||
Total MPLX LP partners’ capital | 8,366 | 8,379 | |
Total equity | 8,366 | 8,379 | |
Limited Partners Common Units | MPC | |||
Equity | |||
Total MPLX LP partners’ capital | (1,548) | 2,099 | |
Total equity | (1,548) | 2,099 | |
General Partner | MPC | |||
Equity | |||
Total MPLX LP partners’ capital | 0 | (637) | |
Total equity | 0 | (637) | |
LOOP and Explorer | |||
Equity | |||
Accumulated other comprehensive loss | $ (16) | $ (14) | |
[1] | These components of “Accumulated other comprehensive loss” are included in the computation of net periodic benefit cost by LOOP and Explorer and are therefore included on the Consolidated Statements of Income under the caption “Income from equity method investments.” |
Consolidated Balance Sheets (Pa
Consolidated Balance Sheets (Parenthetical) - shares shares in Millions | Jun. 30, 2018 | Dec. 31, 2017 |
Limited Partners Common Units | Public | ||
Units issued | 289 | 289 |
Units outstanding | 289 | 289 |
Limited Partners Common Units | MPC | ||
Units issued | 505 | 118 |
Units outstanding | 505 | 118 |
General Partner | MPC | ||
GP units issued | 0 | 8 |
GP units outstanding | 0 | 8 |
Consolidated Statements of Cash
Consolidated Statements of Cash Flows - USD ($) $ in Millions | 6 Months Ended | |||
Jun. 30, 2018 | Jun. 30, 2017 | |||
Operating activities: | ||||
Net income | $ 879 | $ 378 | ||
Adjustments to reconcile net income to net cash provided by operating activities: | ||||
Amortization of deferred financing costs | 30 | 25 | ||
Depreciation and amortization | 364 | 351 | ||
Deferred income taxes | 5 | 1 | ||
Asset retirement expenditures | (5) | (1) | ||
Gain on disposal of assets | 0 | (1) | ||
Income from equity method investments | [1] | (111) | (6) | |
Distributions from unconsolidated affiliates | 175 | 66 | ||
Changes in: | ||||
Current receivables | (71) | 17 | ||
Inventories | (5) | (2) | ||
Fair value of derivatives | 0 | (22) | ||
Current accounts payable and accrued liabilities | 119 | (16) | ||
Receivables from / liabilities to related parties | (96) | 22 | ||
Prepaid other current assets from related parties | 4 | 0 | ||
Deferred revenue | 16 | 15 | ||
All other, net | (14) | 17 | ||
Net cash provided by operating activities | 1,290 | 844 | ||
Investing activities: | ||||
Additions to property, plant and equipment | (862) | (652) | ||
Acquisitions, net of cash acquired | 0 | (220) | ||
Disposal of assets | 4 | 3 | ||
Investments - net related party loans | 0 | 80 | ||
Investments in unconsolidated affiliates | (112) | (640) | ||
Distributions from unconsolidated affiliates - return of capital | 15 | 24 | ||
All other, net | 1 | 0 | ||
Net cash used in investing activities | (954) | (1,405) | ||
Financing activities: | ||||
Long-term debt - borrowings | 9,610 | 2,241 | ||
Long-term debt - repayments | (4,655) | (1) | ||
Related party debt - borrowings | 1,160 | 12 | ||
Related party debt - repayments | (1,433) | (12) | ||
Debt issuance costs | (53) | (21) | ||
Net proceeds from equity offerings | 0 | 443 | ||
Distributions of cash received from joint-interest acquisition entities to MPC | 11 | 0 | ||
Distributions to MPC for acquisitions | (4,100) | (1,511) | ||
Distributions to MPC from Predecessor | 0 | (113) | ||
Distributions to noncontrolling interests | (6) | (2) | ||
Distributions to preferred unitholders | (33) | (33) | ||
Distributions to unitholders and general partner | (814) | (505) | ||
Contributions from noncontrolling interests | 5 | 128 | ||
All other, net | (6) | (7) | ||
Net cash (used in)/provided by financing activities | (336) | 619 | ||
Net increase in cash, cash equivalents and restricted cash | 0 | 58 | ||
Cash, cash equivalents and restricted cash at beginning of period | 9 | [2] | 239 | |
Cash, cash equivalents and restricted cash at end of period | $ 9 | [2] | $ 297 | |
[1] | “Income/(loss) from equity method investments” includes the impact of any basis differential amortization or accretion. | |||
[2] | As a result of the adoption of ASU 2016-18, the Consolidated Statements of Cash Flows now explain the change during the period of both “Cash and cash equivalents” and restricted cash. |
Consolidated Statements of Equi
Consolidated Statements of Equity - USD ($) $ in Millions | Total | PublicLimited Partners Common Units | PublicClass B Unitholders | MPCLimited Partners Common Units | MPCGeneral Partner | Accumulated Other Comprehensive Loss | Noncontrolling Interests | Equity of PredecessorMPC |
Beginning Balance at Dec. 31, 2016 | $ 11,110 | $ 8,086 | $ 133 | $ 1,069 | $ 1,013 | $ 18 | $ 791 | |
Distributions to MPC from Predecessor | (113) | (113) | ||||||
Issuance of units under ATM Program | 443 | 434 | 9 | |||||
Net income | 345 | 127 | 44 | 136 | 2 | 36 | ||
Contribution from MPC | 12 | 12 | ||||||
Allocation of MPC's net investment at acquisition | 0 | 923 | (197) | (726) | ||||
Distribution to MPC for acquisitions | (1,511) | (430) | (1,081) | |||||
Distributions to unitholders | (505) | (289) | (94) | (122) | ||||
Distributions to noncontrolling interests | (2) | (2) | ||||||
Contributions from noncontrolling interests | 128 | 128 | ||||||
Other | 2 | 2 | ||||||
Ending Balance at Jun. 30, 2017 | 9,909 | 8,360 | 133 | 1,512 | (242) | 146 | 0 | |
Beginning Balance at Dec. 31, 2017 | 9,973 | 8,379 | 0 | 2,099 | (637) | $ (14) | 146 | 0 |
Distributions to MPC from Predecessor | 0 | |||||||
Net income | 843 | 337 | 501 | 5 | ||||
Contribution from MPC | 1,046 | 1,046 | ||||||
Allocation of MPC's net investment at acquisition | 0 | 5,172 | (4,126) | (1,046) | ||||
Distribution to MPC for acquisitions | (4,100) | (936) | (3,164) | |||||
Distributions to unitholders | (814) | (355) | (459) | |||||
Distributions to noncontrolling interests | (6) | (6) | ||||||
Contributions from noncontrolling interests | 5 | 5 | ||||||
Partners' Capital Account, Exchanges and Conversions | 0 | (7,926) | 7,926 | |||||
Other | 5 | 5 | 1 | 1 | (2) | |||
Ending Balance at Jun. 30, 2018 | $ 6,952 | $ 8,366 | $ 0 | $ (1,548) | $ 0 | $ (16) | $ 150 | $ 0 |
Description of the Business and
Description of the Business and Basis of Presentation | 6 Months Ended |
Jun. 30, 2018 | |
Accounting Policies [Abstract] | |
Description of the Business and Basis of Presentation | Description of the Business and Basis of Presentation Description of the Business – MPLX LP is a diversified, growth-oriented master limited partnership formed by Marathon Petroleum Corporation. References in this report to “MPLX LP,” “the Partnership,” “we,” “ours,” “us,” or like terms refer to MPLX LP and its subsidiaries (collectively, the “Partnership”). References to “MPC” refer collectively to Marathon Petroleum Corporation as our sponsor and its subsidiaries, other than the Partnership. The Partnership is engaged in the gathering, processing and transportation of natural gas; the gathering, transportation, fractionation, storage and marketing of NGLs; the transportation, storage and distribution of crude oil and refined petroleum products; and refining logistics and fuels distribution services. The Partnership’s principal executive office is located in Findlay, Ohio. Effective March 1, 2017 , the Partnership acquired pipeline, storage and terminal businesses that are operated through Hardin Street Transportation LLC (“HST”), Woodhaven Cavern LLC (“WHC”) and MPLX Terminals LLC (“MPLXT”) from MPC. Effective September 1, 2017 , the Partnership acquired certain ownership percentages in joint venture entities from MPC including: Lincoln Pipeline LLC, MPL Louisiana Holdings LLC, LOCAP LLC (“LOCAP”) and Explorer Pipeline Company (“Explorer”). Effective February 1, 2018 , the Partnership acquired MPC’s refining logistics assets and fuels distribution services. These acquisitions are described further in Note 4 . The Partnership’s business consists of two segments based on the nature of services it offers: Logistics and Storage (“L&S”), which relates primarily to crude oil and refined petroleum products; and Gathering and Processing (“G&P”), which relates primarily to natural gas and NGLs. See Note 10 for additional information regarding the operations and results of these segments. Basis of Presentation – The accompanying interim consolidated financial statements are unaudited; however, in the opinion of the Partnership’s management, these statements reflect all adjustments necessary for a fair statement of the results for the periods reported. All such adjustments are of a normal, recurring nature unless otherwise disclosed. These interim consolidated financial statements, including the notes, have been prepared in accordance with the rules and regulations of the SEC applicable to interim period financial statements and do not include all of the information and disclosures required by GAAP for complete financial statements. Certain amounts in prior years have been reclassified to conform to current year presentation. These interim consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Annual Report on Form 10-K for the year ended December 31, 2017 . The results of operations for the three and six months ended June 30, 2018 are not necessarily indicative of the results to be expected for the full year. The Partnership’s consolidated financial statements include all majority-owned and controlled subsidiaries. For non-wholly-owned consolidated subsidiaries, the interests owned by third parties have been recorded as “Noncontrolling interests” on the accompanying Consolidated Balance Sheets. Intercompany investments, accounts and transactions have been eliminated. The Partnership’s investments in which the Partnership exercises significant influence but does not control and does not have a controlling financial interest are accounted for using the equity method. The Partnership’s investments in a VIE in which the Partnership exercises significant influence but does not control and is not the primary beneficiary are also accounted for using the equity method. In preparing the Consolidated Statements of Equity, net income attributable to MPLX LP is allocated to preferred unitholders based on a fixed distribution schedule, as discussed in Note 9 . Prior to 2018 , when distributions related to the IDRs were made, earnings equal to the amount of those distributions were first allocated to the general partner before the remaining earnings were allocated to the limited partner unitholders based on their respective ownership percentages. Subsequent to the conversion of the general partner to a non-economic interest as described in Note 8 , no earnings will be allocated to the general partner. Distributions, although earned, are not accrued until declared. The allocation of net income attributable to MPLX LP for purposes of calculating net income per limited partner unit is described in Note 7 . |
Summary of Principal Accounting
Summary of Principal Accounting Policies | 6 Months Ended |
Jun. 30, 2018 | |
Accounting Policies [Abstract] | |
Significant Accounting Policies | Summary of Principal Accounting Policies Revenue Recognition – As a result of the adoption of the new revenue recognition standard, as described further in Note 3 , the Partnership has updated its policies as they relate to revenue recognition. Revenue is measured based on consideration specified in a contract with a customer. The Partnership recognizes revenue when it satisfies a performance obligation by transferring control over a product or providing services to a customer. The Partnership enters into a variety of contract types in order to generate “Product sales” and “Service revenue.” The Partnership provides services under the following types of arrangements: • Fee-based arrangements – Under fee-based arrangements, the Partnership receives a fee or fees for one or more of the following services: gathering, processing and transportation of natural gas; gathering, transportation, fractionation, exchange and storage of NGLs; and transportation, storage and distribution of crude oil, refined products and other hydrocarbon-based products. The revenue the Partnership earns from these arrangements is generally directly related to the volume of natural gas, NGLs, refined products or crude oil that is handled by or flows through the Partnership’s systems and facilities and is not normally directly dependent on commodity prices. In certain cases, the Partnership’s arrangements provide for minimum annual payments or fixed demand charges. Fee-based arrangements are reported as “Service revenue” on the Consolidated Statements of Income. Revenue is recognized over time as services are performed in a series. In certain instances when specifically stated in the contract terms, the Partnership purchases product after fee-based services have been provided. Revenue from the sale of products purchased after services are provided is reported as “Product sales” on the Consolidated Statements of Income and recognized on a gross basis, as the Partnership takes control of the product and is the principal in the transaction. • Percent-of-proceeds arrangements – Under percent-of-proceeds arrangements, the Partnership: gathers and processes natural gas on behalf of producers; sells the resulting residue gas, condensate and NGLs at market prices; and remits to producers an agreed-upon percentage of the proceeds. In other cases, instead of remitting cash payments to the producer, the Partnership delivers an agreed-upon percentage of the residue gas and NGLs to the producer (take-in-kind arrangements) and sells the volumes the Partnership retains to third parties. Revenue is recognized on a net basis when the Partnership acts as an agent and does not have control of the gross amount of gas and/or NGLs prior to it being sold. Percent-of-proceeds revenue is reported as “Service revenue - product related” on the Consolidated Statements of Income. • Keep-whole arrangements – Under keep-whole arrangements, the Partnership gathers natural gas from the producer, processes the natural gas and sells the resulting condensate and NGLs to third parties at market prices. Because the extraction of the condensate and NGLs from the natural gas during processing reduces the Btu content of the natural gas, the Partnership must either purchase natural gas at market prices for return to producers or make cash payment to the producers equal to the value of the energy content of this natural gas. Certain keep-whole arrangements also have provisions that require the Partnership to share a percentage of the keep-whole profits with the producers based on the oil to gas ratio or the NGL to gas ratio. “Service revenue - product related” is recorded based on the value of the NGLs received on the date the services are performed. Natural gas purchased to return to the producer and shared NGL profits are recorded as a reduction of “Service revenue - product related” in the Consolidated Statements of Income on the date the services are performed. Sales of NGLs under these arrangements are reported as “Product sales” on the Consolidated Statements of Income and are reported on a gross basis as the Partnership is the principal in the arrangement and controls the product prior to sale. The sale of the NGLs may occur shortly after services are performed at the tailgate of the plant, or after a period of time as determined by the Partnership. • Purchase arrangements – Under purchase arrangements, the Partnership purchases natural gas at either the wellhead or the tailgate of a plant. The Partnership then gathers and delivers the natural gas to pipelines where the Partnership may resell the natural gas. Wellhead purchase arrangements represent an arrangement with a supplier and are recorded in “Purchased product costs.” Often, the Partnership earns fees for services performed prior to taking control of the product in these arrangements and “Service revenue” is recorded for these fees. Revenue generated from the sale of product obtained in tailgate purchase arrangements is reported as “Product sales” on the Consolidated Statements of Income and is recognized on a gross basis as the Partnership purchases and takes control of the product prior to sale and is the principal in the transaction. In many cases, the Partnership provides services under contracts that contain a combination of more than one of the arrangements described above. When fees are charged (in addition to product received) under percent-of-proceeds arrangements, keep-whole arrangements or purchase arrangements, the Partnership records such fees as “Service revenue” on the Consolidated Statements of Income. The terms of the Partnership’s contracts vary based on gas quality conditions, the competitive environment when the contracts are signed and customer requirements. Performance obligations are determined based on the specific terms of the arrangements, economics of the geographical regions, and the services offered and whether they are deemed distinct. The Partnership allocates the consideration earned between the performance obligations based on the stand-alone selling price when multiple performance obligations are identified. Revenue from the Partnership’s service arrangements will generally be recognized over time when the performance obligation is satisfied as services are provided in a series. The Partnership has elected to use the output measure of progress to recognize revenue based on the units delivered, processed or transported. The transaction price has fixed components related to minimum volume commitments and variable components which are primarily dependent on volumes. Variable consideration will generally not be estimated at contract inception as the transaction price is specifically allocable to the services provided each period end. In instances in which tiered pricing structures do not reflect our efforts to perform, the Partnership will estimate variable consideration at contract inception. “Product sales” will be recognized at a point in time when control of the product transfers to the customer. Minimum volume commitments may create contract liabilities or deferred credits if current period payments can be used for future services. Breakage is estimated and recognized into service revenue in instances where it is probable the customer will not use the credit in future periods. Amounts billed to customers for shipping and handling, electricity, and other costs to perform services are included in “Service revenue” on the Consolidated Statements of Income. Shipping and handling costs associated with product sales are included in “Purchased product costs” on the Consolidated Statements of Income. Facility expenses, costs of revenues and depreciation represent those expenses related to operating our various facilities and are necessary to provide both “Product sales” and “Service revenue.” Customers usually pay monthly based on the products purchased or services performed that month. Taxes collected from customers and remitted to the appropriate taxing authority are excluded from revenue. Based on the terms of certain natural gas gathering, transportation and processing agreements, the Partnership is considered to be the lessor under several implicit operating lease arrangements in accordance with GAAP. Revenue and costs related to the portion of the revenue earned under these contracts considered to be implicit leases are recorded as “Rental income” and “Rental cost of sales,” respectively, on the Consolidated Statements of Income. The allocation method used to allocate income between lease and non-lease components was updated as a result of ASC Topic 606, “Revenue from Contracts with Customers” (“ASC 606”). Similarly, the Partnership is considered to be the lessor under implicit operating lease arrangements with MPC in accordance with GAAP. Revenue related to these agreements is recorded as “Rental income - related parties” on the Consolidated Statements of Income. “Rental income” and “Rental income - related parties” are not deemed to be revenue from contracts with customers. The Partnership routinely makes accruals based on estimates for both revenue and expenses due to the timing of compiling billing information, receiving certain third-party information and reconciling the Partnership’s records with those of third parties. The delayed information from third parties includes among other things; actual volumes purchased, transported or sold; adjustments to inventory and invoices for purchases; actual natural gas and NGL deliveries; and other operating expenses. The Partnership makes accruals to reflect estimates for these items based on its internal records and information from third parties. Estimated accruals are adjusted when actual information is received from third parties and the Partnership’s internal records have been reconciled. |
Accounting Standards
Accounting Standards | 6 Months Ended |
Jun. 30, 2018 | |
New Accounting Pronouncements and Changes in Accounting Principles [Abstract] | |
Accounting Standards | Accounting Standards Recently Adopted ASU 2014-09, Revenue - Revenue from Contracts with Customers In May 2014, the FASB issued ASU 2014-09, which created ASC 606. The guidance in ASC 606 states that revenue is recognized when a customer obtains control of a good or service. Recognition of revenue involves a multiple step approach including identifying the contract, identifying the separate performance obligations, determining the transaction price, allocating the price to the performance obligations and recognizing revenue as the obligations are satisfied. Additional disclosures are required to provide adequate information to understand the nature, amount, timing and uncertainty of reported revenues and revenues expected to be recognized. The Partnership adopted the standard as of January 1, 2018 using the modified retrospective method by recognizing the cumulative effect of initially applying the new revenue standard as an adjustment to opening equity. The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. See Note 16 for further details. We also adopted the following standards during the first six months of 2018 , none of which had a material impact to our financial statements or financial statement disclosures: ASU Effective Date 2017-09 Stock Compensation - Scope of Modification Accounting January 1, 2018 2017-05 Gains and Losses from the Derecognition of Nonfinancial Assets - Clarifying the Scope of Asset Derecognition Guidance January 1, 2018 2017-01 Business Combinations - Clarifying the Definition of a Business January 1, 2018 2016-18 Statement of Cash Flows - Restricted Cash January 1, 2018 2016-15 Statement of Cash Flows - Classification of Certain Cash Receipts and Cash Payments January 1, 2018 2016-01 Financial Instruments - Recognition and Measurement of Financial Assets and Liabilities January 1, 2018 Not Yet Adopted ASU 2017-12, Derivatives and Hedging - Targeted Improvements to Accounting for Hedging Activities In August 2017, the FASB issued an accounting standards update to amend the hedge accounting rules to simplify the application of hedge accounting guidance and better portray the economic results of risk management activities in the financial statements. The guidance expands the ability to hedge nonfinancial and financial risk components, reduces complexity in fair value hedges of interest rate risk, eliminates the requirement to separately measure and report hedge ineffectiveness and eases certain hedge effectiveness assessment requirements. The guidance is effective beginning in 2019 with early adoption permitted. The Partnership is currently evaluating the impact of this guidance, including transition elections and required disclosures, on our financial statements and the timing of adoption. However, since we have not historically designated our commodity derivatives as hedges, we do not expect the adoption of this accounting standards update to have a material impact on our consolidated financial statements. ASU 2017-04, Intangibles - Goodwill and Other - Simplifying the Test for Goodwill Impairment In January 2017, the FASB issued an accounting standards update which simplifies the subsequent measurement of goodwill by eliminating Step 2 from the goodwill impairment test. Under the new guidance, the recognition of an impairment charge is calculated based on the amount by which the carrying amount exceeds the reporting unit’s fair value, which could be different from the amount calculated under the current method using the implied fair value of the goodwill; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. The guidance should be applied on a prospective basis, and is effective for annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The Partnership is currently evaluating the impact of this guidance on our financial statements and the timing of adoption. ASU 2016-13, Credit Losses - Measurement of Credit Losses on Financial Instruments In June 2016, the FASB issued an accounting standards update related to the accounting for credit losses on certain financial instruments. The guidance requires that for most financial assets, losses be based on an expected loss approach which includes estimates of losses over the life of exposure that considers historical, current and forecasted information. Expanded disclosures related to the methods used to estimate the losses as well as a specific disaggregation of balances for financial assets are also required. The change is effective for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years, with early adoption permitted for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. The Partnership does not expect application of this accounting standards update to have a material impact on our consolidated financial statements. ASU 2016-02, Leases In February 2016, the FASB issued an accounting standards update requiring lessees to record virtually all leases on their balance sheets. The accounting standards update also requires expanded disclosures to help financial statement users better understand the amount, timing and uncertainty of cash flows arising from leases. For lessors, this amended guidance modifies the classification criteria and the accounting for sales-type and direct financing leases. The change will be effective on a modified retrospective basis for fiscal years beginning after December 15, 2018, and interim periods within those years, with early adoption permitted. The Partnership continues to evaluate the impact of this standard on our financial statements and disclosures, internal controls and accounting policies. This evaluation process includes reviewing all forms of leases, performing a completeness assessment over the lease population and analyzing the practical expedients in order to determine the best path of implementing changes to existing processes and controls. We are implementing a third-party supported lease accounting information system to account for our lease population in accordance with this new standard and establishing internal controls over the new system. We believe the adoption of the standard will have a material impact on our consolidated financial statements as virtually all leases will be recognized as a right of use asset and lease obligation. |
Acquisitions
Acquisitions | 6 Months Ended |
Jun. 30, 2018 | |
Business Combinations [Abstract] | |
Acquisitions | Acquisitions Refining Logistics and Fuels Distribution Acquisition On February 1, 2018 , MPC and MPLX LP closed on an agreement for the dropdown of refining logistics assets and fuels distribution services to MPLX LP. MPC contributed these assets and services in exchange for $4.1 billion in cash and a fixed number of MPLX LP common units and general partner units of 111,611,111 and 2,277,778 , respectively. The fair value of the common and general partner units issued as of the acquisition date was $4.3 billion based on the closing common unit price as of February 1, 2018 , as recorded on the Consolidated Statements of Equity, for a total purchase price of $8.4 billion . The equity issued consisted of: (i) 85,610,278 common units to MPLX GP LLC (“MPLX GP”), (ii) 18,176,666 common units to MPLX Logistics Holdings LLC (“MPLX Logistics”) and (iii) 7,824,167 common units to MPLX Holdings Inc. (“MPLX Holdings”). The Partnership also issued 2,277,778 general partner units to MPLX GP in order to maintain its two percent general partner interest (“GP Interest”) in the Partnership. MPC agreed to waive approximately one-third of the first quarter 2018 distributions on the common units issued in connection with this transaction. As a result of this waiver, MPC did not receive $23.7 million of the distributions that would have otherwise accrued on such common units with respect to the first quarter 2018. Immediately following this transaction, the GP Interest was converted into a non-economic general partner interest as discussed in Note 8 . The Partnership recorded this transaction on a historical basis as required for transactions between entities under common control. No effect was given to the prior periods as these entities were not considered businesses prior to the February 1, 2018 dropdown. In connection with the dropdown, approximately $830 million of net property, plant and equipment was recorded in addition to $85 million and $130 million of goodwill allocated to MPLX Refining Logistics LLC (“Refining Logistics”) and MPLX Fuels Distribution LLC (“Fuels Distribution”), respectively. Both the refining logistics assets and the fuels distribution services are accounted for within the L&S segment. The Refining Logistics assets include 619 tanks with approximately 56 million barrels of storage capacity (crude, finished products and intermediates), 32 rail and truck racks, 18 docks, and gasoline blenders. These assets generate revenue through storage services agreements with MPC. Refining Logistics is the sole and exclusive provider of certain services to MPC related to the receipt, storage, throughput, custody and delivery of petroleum products in and through certain storage and logistical facilities and assets associated with MPC’s refineries. Fuels Distribution, which is a wholly owned subsidiary of MPLXT, generates revenue through a fuels distribution services agreement with MPC. Fuels Distribution is structured to provide a broad range of scheduling and marketing services as MPC’s sole and exclusive agent. The amounts of revenue and income from operations associated with these investments included in the Consolidated Statements of Income, since the February 1, 2018 acquisition date, were as follows: (In millions) Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 Revenues and other income $ 364 $ 629 Income from operations $ 232 $ 413 Joint-Interest Acquisition On September 1, 2017 , the Partnership entered into a Membership Interests and Shares Contributions Agreement (the “September 2017 Contributions Agreement”) with MPLX GP, MPLX Logistics, MPLX Holdings and MPC Investment LLC (“MPC Investment”), each a wholly-owned subsidiary of MPC, whereby the Partnership agreed to acquire certain ownership interests in joint venture entities indirectly held by MPC. Pursuant to the September 2017 Contributions Agreement, MPC Investment agreed to contribute: all of the membership interests of Lincoln Pipeline LLC, which holds a 35 percent interest in Illinois Extension Pipeline Company, L.L.C. (“Illinois Extension”); all of the membership interests of MPL Louisiana Holdings LLC, which holds a 41 percent interest in LOOP LLC (“LOOP”); a 59 percent interest in LOCAP; and a 25 percent interest in Explorer, through a series of intercompany contributions to the Partnership for an agreed upon purchase price of approximately $420 million in cash and equity consideration valued at approximately $630 million for total consideration of $1.05 billion (collectively, the “Joint-Interest Acquisition”). The number of common units representing the equity consideration was then determined by dividing the contribution amount by the simple average of the ten day trading volume weighted average NYSE price of a common unit for the ten trading days ending at market close on August 31, 2017 . The fair value of the common and general partner units issued was approximately $653 million based on the closing common unit price as of September 1, 2017 , as recorded on the Consolidated Statements of Equity, for a total purchase price of $1.07 billion . The equity issued consisted of: (i) 13,719,017 common units to MPLX GP, (ii) 3,350,893 common units to MPLX Logistics and (iii) 1,441,224 common units to MPLX Holdings. The Partnership also issued 377,778 general partner units to MPLX GP in order to maintain its two percent GP Interest in the Partnership. Illinois Extension operates the 168 -mile, 24 -inch diameter Southern Access Extension (“SAX”) crude oil pipeline from Flanagan, Illinois to Patoka, Illinois, as well as additional tankage and two pump stations. LOOP owns and operates midstream crude oil infrastructure, including a deep water oil port offshore of Louisiana, pipelines and onshore storage facilities. LOOP also manages the operations of LOCAP, an affiliate pipeline system. LOCAP owns and operates a crude oil pipeline and tank facility in St. James, Louisiana, that distributes oil received from LOOP’s storage facilities and other connecting pipelines to nearby refineries and into the mid-continent region of the United States. Explorer owns and operates an approximate 1,830 -mile common carrier pipeline that primarily transports gasoline, diesel, diluent and jet fuel from the Gulf Coast region to the Midwest United States. The Partnership accounts for the Joint-Interest Acquisition entities as equity method investments within its L&S segment. As a transfer between entities under common control, the Partnership recorded the Joint-Interest Acquisition on its Consolidated Balance Sheets at MPC’s historical basis, which included accumulated other comprehensive loss. The Partnership recognizes an accumulated other comprehensive loss on its Consolidated Balance Sheets relating to pension and other post-retirement benefits provided by the LOOP and Explorer joint-interests to their employees. MPLX LP is not a sponsor of these benefit plans. Distributions of cash received from the entities and interests acquired in the Joint-Interest Acquisition related to periods prior to the acquisition were prorated on a daily basis with MPLX LP retaining the portion of distributions beginning on the closing date. All amounts distributed to MPLX LP related to periods before the acquisition have been paid to MPC. Additionally, MPLX LP agreed to pay MPC for any distributions of cash from LOOP related to the sale of LOOP’s excess crude oil inventory. Because the future distributions or payments could not be reasonably quantified, a liability was not recorded in connection with the acquisition. MPLX LP subsequently received distributions related to the time period prior to the acquisition, which it remitted to MPC and recorded a corresponding decrease to the general partner’s equity for $32 million . The Partnership accounts for the interests acquired in the Joint-Interest Acquisition one month in arrears, which is the most recently available information. The amount of income associated with these investments included on the Consolidated Statements of Income under the caption “ Income from equity method investments ” for the three and six months ended June 30, 2018 totaled $25 million and $62 million , respectively. The Partnership’s investment balance at June 30, 2018 related to the acquired interests is approximately $632 million and reported under the caption “Equity method investments” on the Consolidated Balance Sheets. MPC agreed to waive approximately two-thirds of the third quarter 2017 distributions on the common units issued in connection with the Joint-Interest Acquisition. As a result of this waiver, MPC did not receive approximately two-thirds of the distributions or IDRs that would have otherwise accrued on such common units with respect to the third quarter 2017 distributions. The value of these waived distributions was $10 million . Acquisition of Hardin Street Transportation LLC, Woodhaven Cavern LLC and MPLX Terminals LLC MPC contributed the assets of HST, WHC and MPLXT to newly created and wholly-owned subsidiaries and entered into commercial agreements related to services provided by these new entities to MPC on January 1, 2015 for HST and WHC and April 1, 2016 for MPLXT. Pursuant to a Membership Interests Contributions Agreement entered into on March 1, 2017 by the Partnership with MPLX GP, MPLX Logistics, MPLX Holdings and MPC Investment (each a wholly-owned subsidiary of MPC), MPC Investment agreed to contribute the outstanding membership interests in HST, WHC and MPLXT through a series of intercompany contributions to the Partnership for approximately $1.5 billion in cash and equity consideration valued at approximately $504 million . The number of common units representing the equity consideration was determined by dividing the contribution amount by the simple average of the ten day trailing volume weighted average NYSE price of a common unit for the ten trading days ending at market close on February 28, 2017. The fair value of the common and general partner units issued was approximately $503 million , and consisted of (i) 9,197,900 common units to MPLX GP, (ii) 2,630,427 common units to MPLX Logistics and (iii) 1,132,049 common units to MPLX Holdings. The Partnership also issued 264,497 general partner units to MPLX GP in order to maintain its two percent GP Interest in the Partnership. MPC agreed to waive two-thirds of the first quarter 2017 distributions on the common units issued in connection with this transaction. As a result of this waiver, MPC did not receive two-thirds of the general partner distributions or IDRs that would have otherwise accrued on such common units with respect to the first quarter 2017 distributions. The value of these waived distributions was $6 million . HST owns and operates various private crude oil and refined product pipeline systems and associated storage tanks. As of the acquisition date, these pipeline systems consisted of 174 miles of crude oil pipelines and 430 miles of refined products pipelines. WHC owns and operates eight butane and propane storage caverns located in Michigan with approximately 1.8 million barrels of NGL storage capacity. As of the acquisition date, MPLXT owned and operated 59 terminals for the receipt, storage, blending, additization, handling and redelivery of refined petroleum products. Additionally, MPLXT operated one leased terminal and had partial ownership interest in two terminals. Collectively, these 62 terminals have a combined shell capacity of approximately 23.6 million barrels. The terminal facilities are located primarily in the Midwest, Gulf Coast and Southeast regions of the United States. The Partnership accounts for these businesses within its L&S segment. Acquisition of Ozark Pipeline On March 1, 2017, the Partnership acquired the Ozark pipeline from Enbridge Pipelines (Ozark) LLC for approximately $219 million , including purchase price adjustments made in the second quarter of 2017. Based on the final fair value estimates of assets acquired and liabilities assumed at the acquisition date, the purchase price was primarily allocated to property, plant and equipment. The Ozark pipeline is a 433 -mile, 22 -inch crude oil pipeline originating in Cushing, Oklahoma, and terminating in Wood River, Illinois, capable of transporting approximately 230 mbpd. The Partnership accounts for the Ozark pipeline within its L&S segment. MarEn Bakken On February 15, 2017, the Partnership closed on a joint venture, MarEn Bakken Company LLC (“MarEn Bakken”), with Enbridge Energy Partners LP in which MPLX LP acquired a partial, indirect interest in the Dakota Access Pipeline and Energy Transfer Crude Oil Company Pipeline projects, collectively referred to as the Bakken Pipeline system, from Energy Transfer Partners, L.P. and Sunoco Logistics Partners, LP. The Bakken Pipeline system is capable of transporting more than 520 mbpd of crude oil from the Bakken/Three Forks production area in North Dakota to the Midwest through Patoka, Illinois and ultimately to the Gulf Coast. The Partnership contributed $500 million of the $2.0 billion purchase price paid by MarEn Bakken to acquire a 37 percent indirect interest in the Bakken Pipeline system. The Partnership holds, through a subsidiary, a 25 percent interest in MarEn Bakken, which equates to an approximate 9 percent indirect interest in the Bakken Pipeline system. The Partnership accounts for its investment in MarEn Bakken as an equity method investment and bases the equity method accounting for this joint venture one month in arrears which is the most recently available information. The amount of income or loss associated with these investments included on the Consolidated Statements of Income under the caption “ Income from equity method investments ” for the three and six months ended June 30, 2018 totaled $11 million and $18 million , respectively. The Partnership’s investment balance at June 30, 2018 is approximately $508 million and reported under the caption “Equity method investments” on the Consolidated Balance Sheets. In connection with the Partnership’s acquisition of a partial, indirect equity interest in the Bakken Pipeline system, MPC agreed to waive its right to receive incentive distributions of $1.6 million per quarter for twelve consecutive quarters, beginning with distributions declared in the first quarter of 2017 and paid to MPC in the second quarter of 2017, which was prorated to $0.8 million from the acquisition date. This waiver is no longer applicable as a result of the conversion of the GP Interest to a non-economic general partner interest as discussed in Note 8 . |
Equity Method Investments
Equity Method Investments | 6 Months Ended |
Jun. 30, 2018 | |
Equity Method Investments and Joint Ventures [Abstract] | |
Investments and Noncontrolling Interests [Text Block] | Investments and Noncontrolling Interests The following table presents the Partnership’s equity method investments at the dates indicated: Ownership as of Carrying value at June 30, June 30, December 31, (In millions) 2018 2018 2017 Centrahoma Processing LLC 40% $ 123 $ 121 Explorer 25% 95 89 Illinois Extension 35% 285 284 LOCAP 59% 27 24 LOOP 41% 226 225 MarEn Bakken 25% 508 520 MarkWest EMG Jefferson Dry Gas Gathering Company, L.L.C. 67% 194 164 MarkWest Utica EMG, L.L.C. 56% 2,092 2,139 Ohio Condensate Company, L.L.C. 60% 11 11 Panola Pipeline Company, LLC 15% 23 24 Sherwood Midstream LLC 50% 291 236 Sherwood Midstream Holdings LLC 63% 155 165 Other 12 8 Total $ 4,042 $ 4,010 Summarized financial information for the Partnership’s equity method investments for the six months ended June 30, 2018 and 2017 is as follows: Six Months Ended June 30, 2018 (In millions) MarkWest Utica EMG, L.L.C. Other VIEs Non-VIEs Total Revenues and other income $ 117 $ 92 $ 589 $ 798 Costs and expenses 89 38 305 432 Income from operations 28 54 284 366 Net income 27 54 256 337 Income/(loss) from equity method investments (1) $ (4 ) $ 30 $ 85 $ 111 Six Months Ended June 30, 2017 (In millions) MarkWest Utica EMG, L.L.C. Other VIEs Non-VIEs Total Revenues and other income $ 88 $ 21 $ 91 $ 200 Costs and expenses 48 17 73 138 Income from operations 40 4 18 62 Net income 40 4 17 61 Income/(loss) from equity method investments (1) $ 2 $ (1 ) $ 5 $ 6 (1) “Income/(loss) from equity method investments” includes the impact of any basis differential amortization or accretion. Summarized balance sheet information for the Partnership’s equity method investments as of June 30, 2018 and December 31, 2017 is as follows: June 30, 2018 (In millions) MarkWest Utica EMG, L.L.C. (1) Other VIEs Non-VIEs Total Current assets $ 78 $ 58 $ 353 $ 489 Noncurrent assets 2,007 1,109 4,616 7,732 Current liabilities 30 86 187 303 Noncurrent liabilities $ 5 $ 10 $ 871 $ 886 December 31, 2017 (In millions) MarkWest Utica EMG, L.L.C. (1) Other VIEs Non-VIEs Total Current assets $ 65 $ 46 $ 399 $ 510 Noncurrent assets 2,077 930 4,624 7,631 Current liabilities 39 44 220 303 Noncurrent liabilities $ 3 $ 11 $ 904 $ 918 (1) MarkWest Utica EMG, L.L.C.’s (“MarkWest Utica EMG”) noncurrent assets include its investment in its subsidiary, Ohio Gathering Company, L.L.C. (“Ohio Gathering”), which does not appear elsewhere in this table. The investment was $769 million and $790 million as of June 30, 2018 and December 31, 2017 , respectively. As of June 30, 2018 and December 31, 2017 , the carrying value of the Partnership’s equity method investments exceeded the underlying net assets of its investees by $1.0 billion and $118 million for the G&P and L&S segments, respectively. This basis difference is being amortized into net income over the remaining estimated useful lives of the underlying net assets, except for $459 million and $39 million of excess related to goodwill for the G&P and L&S segments, respectively. MarkWest Utica EMG Effective January 1, 2012, MarkWest Utica Operating Company, L.L.C. (“Utica Operating”), a wholly-owned and consolidated subsidiary of MarkWest, and EMG Utica, LLC (“EMG Utica”) executed agreements to form a joint venture, MarkWest Utica EMG, to develop significant natural gas gathering, processing and NGL fractionation, transportation and marketing infrastructure in eastern Ohio. MarkWest Utica EMG is deemed to be a VIE. Utica Operating is not deemed to be the primary beneficiary, due to EMG Utica’s voting rights on significant matters. The Partnership’s maximum exposure to loss as a result of its involvement with MarkWest Utica EMG includes its equity investment, any additional capital contribution commitments and any operating expenses incurred by the subsidiary operator in excess of its compensation received for the performance of the operating services. The Partnership did not provide any financial support to MarkWest Utica EMG that it was not contractually obligated to provide during the six months ended June 30, 2018 . Ohio Gathering Ohio Gathering is a subsidiary of MarkWest Utica EMG and is engaged in providing natural gas gathering services in the Utica Shale in eastern Ohio. Ohio Gathering is a joint venture between MarkWest Utica EMG and Summit Midstream Partners, LLC. As of June 30, 2018 , the Partnership has an approximate 34 percent indirect ownership interest in Ohio Gathering. As Ohio Gathering is a subsidiary of MarkWest Utica EMG, which is accounted for as an equity method investment, the Partnership reports its portion of Ohio Gathering’s net assets as a component of its investment in MarkWest Utica EMG. Sherwood Midstream Effective January 1, 2017, MarkWest Liberty Midstream & Resources, L.L.C. (“MarkWest Liberty Midstream”), a wholly-owned and consolidated subsidiary of MarkWest, and Antero Midstream Partners, LP (“Antero Midstream”) formed a joint venture, Sherwood Midstream LLC (“Sherwood Midstream”), to support Antero Resources Corporation’s development in the Marcellus Shale. Pursuant to the terms of the related limited liability company agreement (the “LLC Agreement”), MarkWest Liberty Midstream contributed assets then under construction with a fair value of approximately $134 million and cash of approximately $20 million . Antero Midstream made an initial capital contribution of approximately $154 million . Also effective January 1, 2017, MarkWest Liberty Midstream converted all of its ownership interests in MarkWest Ohio Fractionation Company, L.L.C. (“Ohio Fractionation”), a previously wholly-owned subsidiary, to Class A Interests and amended its LLC Agreement to create Class B-3 Interests, which were sold to Sherwood Midstream for $126 million in cash. The Class B-3 Interests provide Sherwood Midstream with the right to fractionation revenue and the obligation to pay expenses related to 20 mbpd of capacity in the Hopedale 3 fractionator. Sherwood Midstream accounts for its investment in Ohio Fractionation, which is a VIE, as an equity method investment as Sherwood Midstream does not control Ohio Fractionation. MarkWest Liberty Midstream has been deemed to be the primary beneficiary of Ohio Fractionation because it has control over the decisions that could significantly impact its financial performance, and as a result, consolidates Ohio Fractionation. The creditors of Ohio Fractionation do not have recourse to MPLX LP’s general credit through guarantees or other financial arrangements. The assets of Ohio Fractionation are the property of Ohio Fractionation and cannot be used to satisfy the obligations of MPLX LP. Sherwood Midstream’s interests are reflected on “Net income attributable to noncontrolling interests” in the Consolidated Statements of Income and “Noncontrolling interests” on the Consolidated Balance Sheets. Sherwood Midstream is deemed to be a VIE. MarkWest Liberty Midstream is not deemed to be the primary beneficiary, due to Antero Midstream’s voting rights on significant matters. The Partnership’s maximum exposure to loss as a result of its involvement with Sherwood Midstream includes its equity investment, any additional capital contribution commitments and any operating expenses incurred by the subsidiary operator in excess of its compensation received for the performance of the operating services. The Partnership did not provide any financial support to Sherwood Midstream that it was not contractually obligated to provide during the six months ended June 30, 2018 . Sherwood Midstream Holdings Effective January 1, 2017, MarkWest Liberty Midstream and Sherwood Midstream formed a joint venture, Sherwood Midstream Holdings LLC (“Sherwood Midstream Holdings”), for the purpose of owning, operating and maintaining all of the shared assets that support the operations of the gas plants, other assets owned by Sherwood Midstream, and the gas plants and deethanization facilities owned by MarkWest Liberty Midstream. MarkWest Liberty Midstream initially contributed certain real property, equipment and facilities with a fair value of approximately $209 million to Sherwood Midstream Holdings in exchange for a 79 percent initial ownership interest. Sherwood Midstream contributed cash of approximately $44 million to Sherwood Midstream Holdings in exchange for a 21 percent ownership interest. During the second quarter ended June 30, 2017, true-ups to the initial contributions were finalized. MarkWest Liberty Midstream contributed certain additional real property, equipment and facilities with a fair value of approximately $10 million to Sherwood Midstream Holdings and Sherwood Midstream contributed cash of approximately $4 million to Sherwood Midstream Holdings. The contribution was determined to be an in-substance sale of real estate. During the six months ended June 30, 2018 , MarkWest Liberty Midstream sold to Sherwood Midstream six percent of its equity ownership in Sherwood Midstream Holdings for $15 million . The Partnership accounts for Sherwood Midstream Holdings, which is a VIE, as an equity method investment as Sherwood Midstream is considered to be the general partner and controls all decisions. The Partnership’s maximum exposure to loss as a result of its involvement with Sherwood Midstream Holdings includes its equity investment, any additional capital contribution commitments and any operating expenses incurred by the subsidiary operator in excess of its compensation received for the performance of the operating services. The Partnership did not provide any financial support to Sherwood Midstream Holdings that it was not contractually obligated to provide during the six months ended June 30, 2018 . Sherwood Midstream has been deemed the primary beneficiary of Sherwood Midstream Holdings due to its controlling financial interest through its authority to manage the joint venture. As a result, Sherwood Midstream consolidates Sherwood Midstream Holdings. Therefore, the Partnership also reports its portion of Sherwood Midstream Holdings’ net assets as a component of its investment in Sherwood Midstream. As of June 30, 2018 , the Partnership has an 18.5 percent indirect ownership interest in Sherwood Midstream Holdings through Sherwood Midstream. |
Related Party Agreements and Tr
Related Party Agreements and Transactions | 6 Months Ended |
Jun. 30, 2018 | |
Related Party Transactions [Abstract] | |
Related Party Agreements and Transactions | Related Party Agreements and Transactions The Partnership’s material related parties are: • MPC, which refines, markets and transports crude oil and petroleum products, primarily in the Midwest, Gulf Coast, East Coast and Southeast regions of the United States. • MarkWest Utica EMG, in which MPLX LP has a 56 percent interest as of June 30, 2018 . MarkWest Utica EMG is engaged in natural gas processing and NGL fractionation, transportation and marketing in Ohio. • Ohio Gathering, in which MPLX LP has a 34 percent indirect interest as of June 30, 2018 . Ohio Gathering is a subsidiary of MarkWest Utica EMG providing natural gas gathering service in the Utica Shale region of eastern Ohio. • Sherwood Midstream, in which MPLX LP has a 50 percent interest as of June 30, 2018 . Sherwood Midstream supports the development of Antero Resources Corporation’s Marcellus Shale acreage in the rich-gas corridor of West Virginia. • Sherwood Midstream Holdings, in which MPLX LP has an 81 percent total direct and indirect interest as of June 30, 2018 . Sherwood Midstream Holdings owns certain infrastructure at the Sherwood Complex that is shared by and supports the operation of both the Sherwood Midstream and MarkWest gas processing plants and deethanization facilities. • MarkWest EMG Jefferson Dry Gas Gathering Company, LLC (“Jefferson Dry Gas”), in which MPLX LP has a 67 percent interest as of June 30, 2018 . Jefferson Dry Gas provides natural dry gas gathering and related services in the Utica Shale region of Ohio. Related Party Agreements The Partnership has various long-term, fee-based commercial agreements with MPC. Under these agreements, the Partnership provides transportation, terminal, fuels distribution, marketing and storage services to MPC. MPC has committed to provide the Partnership with minimum quarterly throughput volumes on crude oil and refined products systems and minimum storage volumes of crude oil, refined products and butane. In addition, the Partnership is party to a loan agreement with MPC Investment (the “MPC Loan Agreement”). Under the terms of the agreement, MPC Investment makes a loan or loans to the Partnership on a revolving basis as requested by the Partnership and as agreed to by MPC Investment. On April 27, 2018, the Partnership and MPC Investment entered into an amendment to the MPC Loan Agreement to increase the borrowing capacity under the MPC Loan Agreement from $500 million to $1 billion in aggregate principal amount of all loans outstanding at any one time. The entire unpaid principal amount of the loan, together with all accrued and unpaid interest and other amounts (if any), shall become due and payable on December 4, 2020 . MPC Investment may demand payment of all or any portion of the outstanding principal amount of the loan, together with all accrued and unpaid interest and other amounts (if any), at any time prior to December 4, 2020 . Borrowings under the loan will bear interest at LIBOR plus 1.50 percent . During the six months ended June 30, 2018 , the Partnership borrowed $1.2 billion and repaid $1.4 billion under the MPC Loan Agreement, resulting in an outstanding balance of $112 million in “Payables - related parties” at June 30, 2018 . Borrowings were at an average interest rate of 3.210 percent , per annum, for the six months ended June 30, 2018 . During the year ended December 31, 2017 , the Partnership borrowed $2.4 billion and repaid $2.0 billion under the MPC Loan Agreement, resulting in an outstanding balance of $386 million in “Payable - related parties” at December 31, 2017 . Borrowings were at an average interest rate of 2.777 percent , per annum, for the year ended December 31, 2017 . For additional information regarding the Partnership’s commercial and other agreements with MPC, see Item 1. Business in our Annual Report on Form 10-K for the year ended December 31, 2017 . Refining Logistics and Fuels Distribution Agreements As discussed in Note 4 , the Partnership acquired Refining Logistics and Fuels Distribution on February 1, 2018 . Refining Logistics and Fuels Distribution, along with their subsidiaries, have various storage services agreements and a fuels distribution services agreement with MPC which were assumed by the Partnership with the closing of the transaction. The commercial agreements with MPC include: • Fuels distribution services agreement – Fuels Distribution is a party to a services agreement with MPC in connection with the dropdown of the fuels distribution services. Under this agreement, Fuels Distribution provides services related to the scheduling and marketing of certain petroleum products to MPC. Fuels Distribution does not provide the same services to third parties without the prior written consent of MPC, and Fuels Distribution is MPC’s sole provider of these services. This agreement has an initial term of 10 years, subject to a five -year renewal period under terms to be renegotiated at that time. Under the Fuels Distribution Services Agreement, MPC pays Fuels Distribution a tiered monthly fee based on the volume of MPC’s products sold by Fuels Distribution each month, subject to a maximum annual volume. Fuels Distribution has agreed to use commercially reasonable efforts to sell not less than a minimum quarterly volume of MPC’s products during each calendar quarter. If Fuels Distribution sells less than the minimum quarterly volume of MPC’s products during any calendar quarter despite its commercially reasonable efforts, MPC will pay Fuels Distribution a deficiency payment equal to the volume deficiency multiplied by the applicable tiered fee. The dollar amount of actual sales volume of MPC’s products that exceeds the minimum quarterly volume (an “Excess Sale”) for a particular quarter will be applied as a credit, on a first-in-first-out basis, against any future deficiency payment owed by MPC to Fuels Distribution during the four calendar quarters immediately following the calendar quarter in which the Excess Sale occurs. • Storage services agreements – Refining Logistics is party to storage services agreements with each of MPC’s refineries in connection with the dropdown of the refining logistics assets. Under these agreements, the subsidiaries of Refining Logistics provide certain services exclusively to MPC related to the receipt, storage, throughput, custody and delivery of petroleum products in and through certain storage and logistical facilities and assets associated with MPC’s refineries. These agreements have initial terms of 10 years, subject to five -year renewal periods under terms to be renegotiated at that time. MPC pays Refining Logistics monthly fees for such storage and logistical services calculated as set forth in the agreements. The storage and logistical facilities subject to the agreements are to be allocated exclusively to MPC for the term of the agreement. • Co-location services agreements – Refining Logistics is party to co-location services agreements with each of MPC’s refineries in connection with the dropdown of the refining logistics assets. Under these agreements, MPC provides management, operational and other services to the subsidiaries of Refining Logistics. Refining Logistics pays MPC monthly fixed fees and direct reimbursements for such services calculated as set forth in the agreements. These agreements have initial terms of 50 years. • Ground lease agreements – Refining Logistics is party to ground lease agreements with each of MPC’s refineries in connection with the dropdown of the Refining Logistics assets. Under these agreements, MPLX is the lessor of certain sections of property which contain facilities owned by Refining Logistics and are within the premises of MPC’s refineries. Refining Logistics pays MPC monthly fixed fees under these ground leases. These agreements have initial terms of 50 years . Related Party Transactions Related party sales to MPC consisted of crude oil and refined products pipeline transportation services based on regulated tariff rates; storage, terminal and fuels distribution services based on contracted rates; and marine transportation services. Related party sales to MPC also consist of revenue related to volume deficiency credits. Revenue received from related parties related to service and product sales were as follows: Three Months Ended June 30, Six Months Ended June 30, (In millions) 2018 2017 2018 2017 Service revenues MPC $ 549 $ 270 $ 1,020 $ 525 Rental income MPC 190 70 335 137 Product sales (1) MPC $ 13 $ 2 $ 17 $ 4 (1) There were additional product sales to MPC that net to zero within the consolidated financial statements as the transactions are recorded net due to the terms of the agreements under which such product was sold. For the three and six months ended June 30, 2018 , these sales totaled $112 million and $191 million , respectively. For the three and six months ended June 30, 2017 , these sales totaled $53 million and $110 million , respectively. The Partnership has operating agreements with MPC under which it receives a fee for operating MPC’s retained pipeline assets. The Partnership receives management fee revenue for engineering, construction and administrative services for operating certain of its equity method investments, and is also reimbursed for personnel services. The Partnership has an agreement with MPC under which it receives a fixed annual fee for providing oversight and management services required to run the marine business. The revenue received from these related parties, included in “Other income - related parties” on the Consolidated Statements of Income, was as follows: Three Months Ended June 30, Six Months Ended June 30, (In millions) 2018 2017 2018 2017 MPC $ 10 $ 10 $ 20 $ 21 MarkWest Utica EMG 4 4 8 8 Ohio Gathering 4 4 8 8 Jefferson Dry Gas 2 2 3 3 Sherwood Midstream 2 3 5 4 Other 2 2 3 3 Total $ 24 $ 25 $ 47 $ 47 MPC provides executive management services and certain general and administrative services to the Partnership under the terms of an omnibus agreement. Expenses incurred under this agreement are shown in the table below by the income statement line where they were recorded. Charges for services included in “Purchases - related parties” primarily relate to services that support the Partnership’s operations and maintenance activities, as well as compensation expenses. Charges for services included in “General and administrative expenses” primarily relate to services that support the Partnership’s executive management, accounting and human resources activities. These charges were as follows: Three Months Ended June 30, Six Months Ended June 30, (In millions) 2018 2017 2018 2017 Purchases - related parties $ 43 $ 18 $ 79 $ 33 General and administrative expenses 17 11 33 19 Total $ 60 $ 29 $ 112 $ 52 Also under terms of the omnibus agreement, some service costs related to engineering services are associated with assets under construction. The costs added to “Property, plant and equipment, net” were as follows: Three Months Ended June 30, Six Months Ended June 30, (In millions) 2018 2017 2018 2017 MPC $ 41 $ 12 $ 63 $ 22 MPLX LP obtains employee services from MPC under employee services agreements. Expenses incurred under these agreements are shown in the table below by the income statement line where they were recorded. The costs of personnel directly involved in or supporting operations and maintenance activities related to rental services are classified as “Rental cost of sales - related parties.” The costs of personnel directly involved in or supporting operations and maintenance activities related to other services are classified as “Purchases - related parties.” The costs of personnel involved in executive management, accounting and human resources activities are classified as “General and administrative expenses” on the Consolidated Statements of Income. These charges were as follows: Three Months Ended June 30, Six Months Ended June 30, (In millions) 2018 2017 2018 2017 Rental cost of sales - related parties $ — $ 1 $ 1 $ 1 Purchases - related parties 133 91 247 183 General and administrative expenses 27 24 50 49 Total $ 160 $ 116 $ 298 $ 233 The following table shows other purchases from MPC classified as “Purchases - related parties.” These purchases include product purchases, payments made to MPC in its capacity as general contractor to MPLX LP, and certain rent and lease agreements. Three Months Ended June 30, Six Months Ended June 30, (In millions) 2018 2017 2018 2017 MPC $ 47 $ — $ 74 $ — Receivables from related parties were as follows: (In millions) June 30, 2018 December 31, 2017 MPC $ 286 $ 153 MarkWest Utica EMG 1 1 Ohio Gathering 3 2 Jefferson Dry Gas 1 2 Sherwood Midstream Holdings — — Other 3 2 Total $ 294 $ 160 Long-term receivables with related parties, which includes straight-line rental income, were as follows: (In millions) June 30, 2018 December 31, 2017 MPC $ 22 $ 20 Payables to related parties were as follows: (In millions) June 30, 2018 December 31, 2017 MPC $ 239 $ 470 MarkWest Utica EMG 26 29 Ohio Gathering — 8 Sherwood Midstream 8 8 Other — 1 Total $ 273 $ 516 Other current assets included $5 million and $8 million of related party prepaid insurance as of June 30, 2018 and December 31, 2017 , respectively. From time to time, the Partnership may also sell to or purchase from related parties assets and inventory at the lesser of average unit cost or net realizable value. Sales to related parties for the six months ended June 30, 2018 and 2017 were $3 million and $4 million , respectively. Purchases from related parties during the six months ended June 30, 2018 and 2017 were approximately $1 million and $5 million , respectively. During the six months ended June 30, 2018 and the year ended December 31, 2017 , MPC did not ship its minimum committed volumes on certain pipeline systems. Under the Partnership’s pipeline transportation services agreements, if MPC fails to transport its minimum throughput volumes during any quarter, then MPC will pay the Partnership a deficiency payment equal to the volume of the deficiency multiplied by the tariff rate then in effect. The deficiency amounts are recorded as “Deferred revenue - related parties.” MPC may then apply the amount of any such deficiency payments as a credit for volumes transported on the applicable pipeline in excess of its minimum volume commitment during the following four or eight quarters under the terms of the applicable transportation services agreement. The Partnership recognizes related party revenues for the deficiency payments when credits are used for volumes transported in excess of minimum quarterly volume commitments, when it becomes impossible to physically transport volumes necessary to utilize the credits or upon the expiration of the credits. The use or expiration of the credits is a decrease in “Deferred revenue - related parties.” In addition, capital projects the Partnership is undertaking at the request of MPC are reimbursed in cash and recognized in income over the remaining term of the applicable agreements. The “Deferred revenue - related parties” balance associated with the minimum volume deficiencies and project reimbursements were as follows: (In millions) June 30, 2018 December 31, 2017 Minimum volume deficiencies - MPC $ 40 $ 53 Project reimbursements - MPC 48 33 Total $ 88 $ 86 |
Net Income Per Limited Partner
Net Income Per Limited Partner Unit | 6 Months Ended |
Jun. 30, 2018 | |
Earnings Per Share [Abstract] | |
Net Income Per Limited Partner Unit | Net Income/(Loss) Per Limited Partner Unit Net income/(loss) per unit applicable to common limited partner units is computed by dividing net income/(loss) attributable to MPLX LP less income/(loss) allocated to participating securities by the weighted average number of common units outstanding. The classes of participating securities include common units, Series A Convertible Preferred units (the "Preferred units") and certain equity-based compensation awards; and in prior periods, general partner units and IDRs. For the three and six months ended June 30, 2018 , the Partnership had dilutive potential common units consisting of certain equity-based compensation awards. For the three and six months ended June 30, 2017 , the Partnership had dilutive potential common units consisting of certain equity-based compensation awards and Class B units. Potential common units omitted from the diluted earnings per unit calculation for the three and six months ended June 30, 2018 and June 30, 2017 were less than 1 million . Three Months Ended June 30, Six Months Ended June 30, (In millions) 2018 2017 2018 2017 Net income attributable to MPLX LP $ 453 $ 190 $ 874 $ 340 Less: Limited partners’ distributions declared on Preferred units (1) 20 17 36 33 General partner’s distributions declared (including IDRs) (1) — 76 — 141 Limited partners’ distributions declared on common units (including common units of general partner) (1) 497 218 964 416 Undistributed net loss attributable to MPLX LP $ (64 ) $ (121 ) $ (126 ) $ (250 ) (1) See Note 8 for distribution information. Three Months Ended June 30, 2018 (In millions, except per unit data) Limited Partners’ Common Units Redeemable Preferred Units Total Basic and diluted net income attributable to MPLX LP per unit: Net income attributable to MPLX LP: Distributions declared $ 497 $ 20 $ 517 Undistributed net loss attributable to MPLX LP (64 ) — (64 ) Net income attributable to MPLX LP (1) $ 433 $ 20 $ 453 Weighted average units outstanding: Basic 794 31 825 Diluted 794 31 825 Net income attributable to MPLX LP per limited partner unit: Basic $ 0.55 Diluted $ 0.55 Three Months Ended June 30, 2017 (In millions, except per unit data) General Partner Limited Partners’ Common Units Redeemable Preferred Units Total Basic and diluted net income attributable to MPLX LP per unit: Net income attributable to MPLX LP: Distributions declared (including IDRs) $ 76 $ 218 $ 17 $ 311 Undistributed net loss attributable to MPLX LP (2 ) (119 ) — (121 ) Net income attributable to MPLX LP (1) $ 74 $ 99 $ 17 $ 190 Weighted average units outstanding: Basic 8 377 31 416 Diluted 8 382 31 421 Net income attributable to MPLX LP per limited partner unit: Basic $ 0.26 Diluted $ 0.26 Six Months Ended June 30, 2018 (In millions, except per unit data) Limited Redeemable Preferred Units Total Basic and diluted net income attributable to MPLX LP per unit: Net income attributable to MPLX LP: Distributions declared $ 964 $ 36 $ 1,000 Undistributed net loss attributable to MPLX LP (126 ) — (126 ) Net income attributable to MPLX LP (1) $ 838 $ 36 $ 874 Weighted average units outstanding: Basic 728 31 759 Diluted 728 31 759 Net income attributable to MPLX LP per limited partner unit: Basic $ 1.15 Diluted $ 1.15 Six Months Ended June 30, 2017 (In millions, except per unit data) General Limited Redeemable Preferred Units Total Basic and diluted net income attributable to MPLX LP per unit: Net income attributable to MPLX LP: Distributions declared (including IDRs) $ 141 $ 416 $ 33 $ 590 Undistributed net loss attributable to MPLX LP (5 ) (245 ) — (250 ) Net income attributable to MPLX LP (1) $ 136 $ 171 $ 33 $ 340 Weighted average units outstanding: Basic 8 370 31 409 Diluted 8 374 31 413 Net income attributable to MPLX LP per limited partner unit: Basic $ 0.46 Diluted $ 0.46 (1) Allocation of net income attributable to MPLX LP assumes all earnings for the period had been distributed based on the current period distribution priorities. |
Equity
Equity | 6 Months Ended |
Jun. 30, 2018 | |
Equity [Abstract] | |
Equity | Equity The changes in the number of units outstanding during the six months ended June 30, 2018 are summarized below: (In units) Common General Partner Total Balance at December 31, 2017 407,130,020 8,308,773 415,438,793 Unit-based compensation awards (1) 239,095 140 239,235 Contribution of refining logistics and fuels distribution assets (2) 111,611,111 2,277,778 113,888,889 Conversion of GP economic interests 275,000,000 (10,586,691 ) 264,413,309 Balance at June 30, 2018 793,980,226 — 793,980,226 (1) As a result of the unit-based compensation awards issued during the first quarter, MPLX GP contributed less than $1 million in exchange for 140 general partner units to maintain its two percent GP Interest. (2) MPC agreed to waive approximately one-third of the first quarter 2018 distributions on the common units issued in connection with this transaction. As a result of this waiver, MPC did not receive $23.7 million of the distributions that would have otherwise accrued on such common units with respect to the first quarter 2018 . See Note 4 for information regarding this acquisition. GP/IDR Exchange – On February 1, 2018 , MPC cancelled its IDRs and converted its economic GP Interest in MPLX LP to a non-economic general partner interest in exchange for 275 million newly issued MPLX LP common units. These units had a fair value of $10.4 billion as of the transaction date as recorded on the Consolidated Statements of Equity. As a result of this transaction, the general partner units and IDRs were eliminated, are no longer outstanding, and no longer participate in distributions of cash from the Partnership. MPC continues to own the non-economic GP Interest in MPLX LP. See Note 7 for more information on the net income per unit calculation. Net Income Allocation – In preparing the Consolidated Statements of Equity, net income attributable to MPLX LP is allocated to preferred unitholders first and subsequently allocated to the limited partner unitholders in accordance with their respective ownership percentages. Prior to 2018, when distributions related to the IDRs were made, earnings equal to the amount of those distributions were first allocated to the general partner before the remaining earnings were allocated to the unitholders, based on their respective ownership percentages. The following table presents the allocation of the general partner’s GP Interest in net income attributable to MPLX LP, for income statement periods occurring prior to the exchange of the GP economic interests: Three Months Ended June 30, Six Months Ended June 30, (In millions) 2017 2017 Net income attributable to MPLX LP $ 190 $ 340 Less: Preferred unit distributions 17 33 General partner's IDRs and other 72 133 Net income attributable to MPLX LP available to general and limited partners 101 174 General partner's two percent GP Interest in net income attributable to MPLX LP 2 3 General partner's IDRs and other 72 133 General partner's GP Interest in net income attributable to MPLX LP $ 74 $ 136 Cash distributions – The Partnership Agreement sets forth the calculation to be used to determine the amount and priority of cash distributions that the common unitholders and preferred unitholders will receive. In accordance with the Partnership Agreement, on July 25, 2018 , the Partnership declared a quarterly cash distribution, based on the results of the second quarter of 2018 , totaling $497 million , or $0.6275 per common unit, which will also be received by preferred unitholders. These distributions will be paid on August 14, 2018 to common unitholders of record on August 6, 2018 . The allocation of total quarterly cash distributions to general, limited and preferred unitholders is as follows for the three and six months ended June 30, 2018 and 2017 . The Partnership’s distributions are declared subsequent to quarter end; therefore, the following table represents total cash distributions applicable to the period in which the distributions were earned. Three Months Ended June 30, Six Months Ended June 30, (In millions) 2018 2017 2018 2017 General partner's distributions: General partner's distributions on general partner units $ — $ 6 $ — $ 11 General partner's distributions on IDRs — 70 — 130 Total distribution on general partner units and IDRs — 76 — 141 Common and preferred unit distributions: Common unitholders, includes common units of general partner 497 218 964 416 Preferred unit distributions 20 17 36 33 Total cash distributions declared $ 517 $ 311 $ 1,000 $ 590 |
Redeemable Preferred Units
Redeemable Preferred Units | 6 Months Ended |
Jun. 30, 2018 | |
Temporary Equity Disclosure [Abstract] | |
Redeemable Preferred Units | Redeemable Preferred Units Private Placement of Preferred Units – On May 13, 2016, MPLX LP completed the private placement of approximately 30.8 million 6.5 percent Preferred units for a cash purchase price of $32.50 per unit. The aggregate net proceeds of approximately $984 million from the sale of the Preferred units were used for capital expenditures, repayment of debt and general partnership purposes. The Preferred units rank senior to all common units with respect to distributions and rights upon liquidation. The holders of the Preferred units received cumulative quarterly distributions equal to $0.528125 per unit for each quarter prior to the second quarter of 2018. Beginning with the second quarter of 2018, the holders of the preferred units are entitled to receive a quarterly distribution equal to the greater of $0.528125 per unit or the amount of distributions they would have received on an as converted basis. On July 25, 2018 , the Partnership declared a quarterly cash distribution of $0.6275 per common unit representing the distribution of income earned during the second quarter of 2018 . The Preferred units will receive this rate in lieu of the lower $0.528125 base amount. The changes in the redeemable preferred balance from December 31, 2017 through June 30, 2018 are summarized below: (In millions) Redeemable Preferred Units Balance at December 31, 2017 $ 1,000 Net income 36 Distributions received by preferred unitholders (33 ) Balance at June 30, 2018 $ 1,003 The holders may convert their Preferred units into common units at any time after the third anniversary of the issuance date or prior to liquidation, dissolution or winding up of the Partnership, in full or in part, subject to minimum conversion amounts and conditions. After the fourth anniversary of the issuance date, the Partnership may convert the Preferred units into common units at any time, in whole or in part, subject to certain minimum conversion amounts and conditions, if the closing price of MPLX LP common units is greater than $48.75 for the 20 day trading period immediately preceding the conversion notice date. The conversion rate for the Preferred units shall be the quotient of (a) the sum of (i) $32.50, plus (ii) any unpaid cash distributions on the applicable Preferred unit, divided by (b) $32.50, subject to adjustment for unit distributions, unit splits and similar transactions. The holders of the Preferred units are entitled to vote on an as-converted basis with the common unitholders and will have certain other class voting rights with respect to any amendment to the Partnership Agreement that would adversely affect any rights, preferences or privileges of the Preferred units. In addition, upon certain events involving a change of control the holders of Preferred units may elect, among other potential elections, to convert their Preferred units to common units at the then change of control conversion rate. The Preferred units are considered redeemable securities under GAAP due to the existence of redemption provisions upon a deemed liquidation event which is outside the Partnership’s control. Therefore, they are presented as temporary equity in the mezzanine section of the Consolidated Balance Sheets. The Preferred units have been recorded at their issuance date fair value, net of issuance costs. Income allocations increase the carrying value, and declared distributions decrease the carrying value of the Preferred units. As the Preferred units are not currently redeemable and not probable of becoming redeemable, adjustment to the initial carrying amount is not necessary and would only be required if it becomes probable that the Preferred units would become redeemable. |
Segment Information
Segment Information | 6 Months Ended |
Jun. 30, 2018 | |
Segment Reporting [Abstract] | |
Segment Reporting Disclosure [Text Block] | Segment Information The Partnership’s chief operating decision maker is the chief executive officer (“CEO”) of its general partner. The CEO reviews the Partnership’s discrete financial information, makes operating decisions, assesses financial performance and allocates resources on a type of service basis. The Partnership has two reportable segments: L&S and G&P. Each of these segments are organized and managed based upon the nature of the products and services it offers. • L&S – transports, stores, distributes and markets crude oil and refined petroleum products. • G&P – gathers, processes and transports natural gas; gathers, transports, fractionates, stores and markets NGLs. During the second quarter of 2018, our CEO began to evaluate the performance of our segments using segment adjusted EBITDA. We have modified our presentation of segment performance metrics to be consistent with this change, including prior periods presented for consistent and comparable presentation. Amounts included in net income and excluded from segment adjusted EBITDA include: (i) depreciation and amortization; (ii) provision for income taxes; (iii) amortization of deferred financing costs; (iv) non-cash equity-based compensation; (v) net interest and other financial costs; (vi) income from equity method investments; (vii) distributions and adjustments related to equity method investments; (viii) unrealized derivative gains and losses; (ix) acquisition costs; (x) noncontrolling interest and (xi) other adjustments as deemed necessary. 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. The tables below present information about revenues and other income, capital expenditures and total assets for our reportable segments: Three Months Ended June 30, Six Months Ended June 30, (In millions) 2018 2017 2018 2017 L&S Service revenue $ 581 $ 302 $ 1,080 $ 580 Rental income 190 70 335 137 Product related revenue 3 — 5 — Income from equity method investments 36 — 80 — Other income 12 12 24 24 Total segment revenues and other income 822 384 1,524 741 Segment adjusted EBITDA (1) 526 184 963 326 Maintenance capital expenditures 25 19 47 27 Growth capital expenditures 93 115 247 220 G&P Service revenue 378 254 732 491 Rental income 84 70 163 139 Product related revenue 267 193 520 398 Income from equity method investments 14 1 31 6 Other income 13 14 28 27 Total segment revenues and other income 756 532 1,474 1,061 Segment adjusted EBITDA (1) 341 290 664 571 Maintenance capital expenditures 8 4 11 8 Growth capital expenditures 406 265 677 431 Equity method investment capital expenditures $ 113 $ 81 $ 167 $ 205 (In millions) June 30, 2018 December 31, 2017 Segment assets Cash and cash equivalents $ 3 $ 5 L&S (2) 5,982 4,611 G&P (2) 15,427 14,884 Total assets $ 21,412 $ 19,500 (1) See the following reconciliation from segment adjusted EBITDA to “Net income.” (2) Equity method investments included in L&S assets were $1.14 billion at June 30, 2018 and $1.15 billion at December 31, 2017 . Equity method investments included in G&P assets were $2.90 billion at June 30, 2018 and $2.86 billion at December 31, 2017 . The table below provides a reconciliation between “Net income” and segment adjusted EBITDA. Three Months Ended June 30, Six Months Ended June 30, (In millions) 2018 2017 2018 2017 Reconciliation to Net income: L&S segment adjusted EBITDA $ 526 $ 184 $ 963 $ 326 G&P segment adjusted EBITDA 341 290 664 571 Total reportable segments 867 474 1,627 897 Depreciation and amortization (188 ) (164 ) (364 ) (351 ) Provision for income taxes (1 ) (2 ) (5 ) (2 ) Amortization of deferred financing costs (15 ) (13 ) (31 ) (25 ) Non-cash equity-based compensation (5 ) (3 ) (9 ) (6 ) Net interest and other financial costs (136 ) (74 ) (250 ) (140 ) Income from equity method investments 50 1 111 6 Distributions/adjustments related to equity method investments (112 ) (33 ) (202 ) (66 ) Unrealized derivative (loss)/gain (1) (8 ) 3 (1 ) 19 Acquisition costs — — (3 ) (4 ) Adjusted EBITDA attributable to noncontrolling interests 4 2 6 3 Adjusted EBITDA attributable to Predecessor (2) — — — 47 Net income $ 456 $ 191 $ 879 $ 378 (1) The Partnership makes a distinction between realized or unrealized gains and losses on derivatives. During the period when a derivative contract is outstanding, changes in the fair value of the derivative are recorded as an unrealized gain or loss. When a derivative contract matures or is settled, the previously recorded unrealized gain or loss is reversed and the realized gain or loss of the contract is recorded. (2) The adjusted EBITDA adjustments related to Predecessor are excluded from adjusted EBITDA attributable to MPLX LP prior to the acquisition date. |
Inventories
Inventories | 6 Months Ended |
Jun. 30, 2018 | |
Inventory Disclosure [Abstract] | |
Inventories | Inventories Inventories consist of the following: (In millions) June 30, 2018 December 31, 2017 NGLs $ 8 $ 4 Line fill 9 8 Spare parts, materials and supplies 56 53 Total inventories $ 73 $ 65 |
Property, Plant and Equipment
Property, Plant and Equipment | 6 Months Ended |
Jun. 30, 2018 | |
Property, Plant and Equipment [Abstract] | |
Property, Plant and Equipment | Property, Plant and Equipment Property, plant and equipment with associated accumulated depreciation is shown below: (In millions) June 30, 2018 December 31, 2017 Natural gas gathering and NGL transportation pipelines and facilities $ 5,353 $ 5,178 Processing, fractionation and storage facilities 4,885 3,893 Pipelines and related assets 2,432 2,253 Barges and towing vessels 597 490 Terminals and related assets 831 821 Refinery and related assets 922 — Land, building, office equipment and other 892 770 Construction-in-progress 1,062 1,057 Total 16,974 14,462 Less accumulated depreciation 3,332 2,275 Property, plant and equipment, net $ 13,642 $ 12,187 |
Fair Value Measurements
Fair Value Measurements | 6 Months Ended |
Jun. 30, 2018 | |
Fair Value Disclosures [Abstract] | |
Fair Value Measurements | Fair Value Measurements Fair Values – Recurring Fair value measurements and disclosures relate primarily to the Partnership’s derivative positions as discussed in Note 14 . The following table presents the financial instruments carried at fair value on a recurring basis as of June 30, 2018 and December 31, 2017 by fair value hierarchy level. The Partnership has elected to offset the fair value amounts recognized for multiple derivative contracts executed with the same counterparty. June 30, 2018 December 31, 2017 (In millions) Assets Liabilities Assets Liabilities Significant unobservable inputs (Level 3) Commodity contracts $ — $ (2 ) $ — $ (2 ) Embedded derivatives in commodity contracts — (66 ) — (64 ) Total carrying value in Consolidated Balance Sheets $ — $ (68 ) $ — $ (66 ) Level 3 instruments include all NGL transactions and embedded derivatives in commodity contracts. The embedded derivative liability relates to a natural gas purchase agreement embedded in a keep-whole processing agreement. The fair value calculation for these Level 3 instruments used significant unobservable inputs including: (1) NGL prices interpolated and extrapolated due to inactive markets ranging from $0.70 to $1.58 per gallon and (2) the probability of renewal of 65 percent for the first five -year term, and assuming renewal of the first term, an 84 percent probability of renewal for the second five -year term of the gas purchase agreement and related keep-whole processing agreement. For commodity contracts, increases in forward NGL prices result in a decrease in the fair value of the derivative assets and an increase in the fair value of derivative liabilities. Increases or decreases in the fractionation spread result in an increase or decrease in the fair value of the embedded derivative liability. An increase in the probability of renewal would result in an increase in the fair value of the related embedded derivative liability. Changes in Level 3 Fair Value Measurements The following table is a reconciliation of the net beginning and ending balances recorded for net assets and liabilities classified as Level 3 in the fair value hierarchy. Three Months Ended June 30, 2018 Three Months Ended June 30, 2017 (In millions) Commodity Derivative Contracts (net) Embedded Derivatives in Commodity Contracts (net) Commodity Derivative Contracts (net) Embedded Derivatives in Commodity Contracts (net) Fair value at beginning of period $ (2 ) $ (58 ) $ — $ (44 ) Total (losses)/gains (realized and unrealized) included in earnings (1) (1 ) (11 ) 2 — Settlements 1 3 — 1 Fair value at end of period (2 ) (66 ) 2 (43 ) The amount of total (losses)/gains for the period included in earnings attributable to the change in unrealized (losses)/gains relating to liabilities still held at end of period $ (1 ) $ (10 ) $ 2 $ (1 ) Six Months Ended June 30, 2018 Six Months Ended June 30, 2017 (In millions) Commodity Derivative Contracts (net) Embedded Derivatives in Commodity Contracts (net) Commodity Derivative Contracts (net) Embedded Derivatives in Commodity Contracts (net) Fair value at beginning of period $ (2 ) $ (64 ) $ (6 ) $ (54 ) Total (losses)/gains (realized and unrealized) included in earnings (1) (1 ) (8 ) 7 8 Settlements 1 6 1 3 Fair value at end of period (2 ) (66 ) 2 (43 ) The amount of total (losses)/gains for the period included in earnings attributable to the change in unrealized (losses)/gains relating to liabilities still held at end of period $ — $ (5 ) $ 5 $ 7 (1) Gains and losses on Commodity Derivative Contracts classified as Level 3 are recorded in “Product sales” on the Consolidated Statements of Income. Gains and losses related to derivatives embedded in commodity contracts are recorded in “Purchased product costs” and “Cost of revenues” on the Consolidated Statements of Income. Fair Values – Reported The Partnership’s primary financial instruments are cash and cash equivalents, receivables, receivables from related parties, accounts payable, payables to related parties and long-term debt. The Partnership’s fair value assessment incorporates a variety of considerations, including (1) the duration of the instruments, (2) MPC’s investment-grade credit rating and (3) the historical incurrence of and expected future insignificance of bad debt expense, which includes an evaluation of counterparty credit risk. The Partnership believes the carrying values of its current assets and liabilities approximate fair value. The recorded value of the amounts outstanding under the bank revolving credit facility, if any, approximates fair value due to the variable interest rate that approximates current market rates. Derivative instruments are recorded at fair value, based on available market information (see Note 14 ). The fair value of the Partnership’s long-term debt is estimated based on recent market non-binding indicative quotes. The fair value of the SMR liability is estimated using a discounted cash flow approach based on the contractual cash flows and the Partnership’s unsecured borrowing rate. The long-term debt and SMR liability fair values are considered Level 3 measurements. The following table summarizes the fair value and carrying value of the long-term debt, excluding capital leases, and SMR liability: June 30, 2018 December 31, 2017 (In millions) Fair Value Carrying Value Fair Value Carrying Value Long-term debt $ 12,021 $ 11,946 $ 7,718 $ 6,966 SMR liability $ 97 $ 89 $ 104 $ 91 |
Derivative Financial Instrument
Derivative Financial Instruments | 6 Months Ended |
Jun. 30, 2018 | |
Derivative Instruments and Hedging Activities Disclosure [Abstract] | |
Derivative Instruments and Hedging Activities Disclosure [Text Block] | Derivative Financial Instruments As of June 30, 2018 , the Partnership had the following outstanding commodity contracts that were executed to manage the cash flow risk associated with future sales of NGLs and purchases of natural gas: Derivative contracts not designated as hedging instruments Financial Position Notional Quantity (net) Natural Gas (MMBtu) Long 467,559 NGLs (Gal) Short 4,830,001 Embedded Derivative - The Partnership has a natural gas purchase commitment embedded in a keep-whole processing agreement with a producer customer in the Southern Appalachian region expiring in December 2022. The customer has the unilateral option to extend the agreement for two consecutive five -year terms through December 2032. For accounting purposes, the natural gas purchase commitment and the term extending options have been aggregated into a single compound embedded derivative. The probability of the customer exercising its options is determined based on assumptions about the customer’s potential business strategy decision points that may exist at the time they would elect whether to renew the contract. The changes in fair value of this compound embedded derivative are based on the difference between the contractual and index pricing, the probability of the producer customer exercising its option to extend and the estimated favorability of these contracts compared to current market conditions. The changes in fair value are recorded in earnings through “Purchased product costs” in the Consolidated Statements of Income. As of June 30, 2018 and December 31, 2017 , the estimated fair value of this contract was a liability of $ 66 million and $ 64 million , respectively. Certain derivative positions are subject to master netting agreements, therefore, the Partnership has elected to offset derivative assets and liabilities that are legally permissible to be offset. As of June 30, 2018 and December 31, 2017 , there were no derivative assets or liabilities that were offset on the Consolidated Balance Sheets. The impact of the Partnership’s derivative instruments on its Consolidated Balance Sheets is summarized below: (In millions) June 30, 2018 December 31, 2017 Derivative contracts not designated as hedging instruments and their balance sheet location Asset Liability Asset Liability Commodity contracts (1) Other current assets / Other current liabilities $ — $ (14 ) $ — $ (14 ) Other noncurrent assets / Deferred credits and other liabilities — (54 ) — (52 ) Total $ — $ (68 ) $ — $ (66 ) (1) Includes embedded derivatives in commodity contracts as discussed above. For further information regarding the fair value measurement of derivative instruments, including the effect of master netting arrangements or collateral, see Note 13 . There were no material changes to the Partnership’s policy regarding the accounting for Level 2 and Level 3 instruments as previously disclosed in the Partnership’s Annual Report on Form 10-K for the year ended December 31, 2017 . The Partnership does not designate any of its commodity derivative positions as hedges for accounting purposes. The impact of the Partnership’s derivative contracts not designated as hedging instruments and the location of gains and losses recognized on the Consolidated Statements of Income is summarized below: Three Months Ended June 30, Six Months Ended June 30, (In millions) 2018 2017 2018 2017 Product sales Realized loss $ (1 ) $ — $ (1 ) $ (1 ) Unrealized gain — 2 1 9 Total derivative (loss)/gain related to product sales (1 ) 2 — 8 Purchased product costs Realized loss (3 ) (2 ) (6 ) (4 ) Unrealized (loss)/gain (8 ) 1 (2 ) 10 Total derivative (loss)/gain related to purchased product costs (11 ) (1 ) (8 ) 6 Cost of revenues Realized (loss)/gain — — — — Unrealized (loss)/gain — — — — Total derivative (loss)/gain related to cost of revenues — — — — Total derivative (loss)/gain $ (12 ) $ 1 $ (8 ) $ 14 |
Debt
Debt | 6 Months Ended |
Jun. 30, 2018 | |
Debt Disclosure [Abstract] | |
Debt | Debt The Partnership’s outstanding borrowings consisted of the following: (In millions) June 30, 2018 December 31, 2017 MPLX LP: Bank revolving credit facility due 2022 $ — $ 505 5.500% senior notes due February 2023 710 710 3.375% senior notes due March 2023 500 — 4.500% senior notes due July 2023 989 989 4.875% senior notes due December 2024 1,149 1,149 4.000% senior notes due February 2025 500 500 4.875% senior notes due June 2025 1,189 1,189 4.125% senior notes due March 2027 1,250 1,250 4.000% senior notes due March 2028 1,250 — 4.500% senior notes due April 2038 1,750 — 5.200% senior notes due March 2047 1,000 1,000 4.700% senior notes due April 2048 1,500 — 4.900% senior notes due April 2058 500 — Consolidated subsidiaries: MarkWest - 4.500% - 5.500% senior notes, due 2023-2025 63 63 Capital lease obligations due 2020 7 7 Total 12,357 7,362 Unamortized debt issuance costs (78 ) (27 ) Unamortized discount (404 ) (389 ) Amounts due within one year (1 ) (1 ) Total long-term debt due after one year $ 11,874 $ 6,945 Credit Agreements On July 21, 2017, the Partnership entered into a syndicated credit agreement to replace its previously outstanding $2.0 billion five -year bank revolving credit facility with a $2.25 billion five -year bank revolving credit facility that expires in July 2022 (the “MPLX Credit Agreement”). The financial covenants and the interest rate terms contained in the new credit agreement are substantially the same as those contained in the previous bank revolving credit facility. During the six months ended June 30, 2018 , the Partnership borrowed $50 million under the MPLX Credit Agreement, at an average interest rate of 2.975 percent , and repaid $555 million . At June 30, 2018 , the Partnership had no outstanding borrowings and $3 million letters of credit outstanding under the new facility, resulting in total availability of $2.247 billion , or 99.9 percent of the borrowing capacity . On January 2, 2018 , the Partnership entered into a term loan agreement with a syndicate of lenders providing for a $ 4.1 billion , 364-day term loan facility. The Partnership drew the entire amount of the term loan facility in a single borrowing on February 1, 2018 with the entire amount then being repaid on February 8, 2018 as described below. The proceeds from the term loan facility were used to fund the cash portion of the dropdown consideration. Senior Notes On February 8, 2018 , the Partnership issued $5.5 billion aggregate principal amount of senior notes in a public offering, consisting of $500 million aggregate principal amount of 3.375 percent unsecured senior notes due March 2023 , $1.25 billion aggregate principal amount of 4.0 percent unsecured senior notes due March 2028 , $1.75 billion aggregate principal amount of 4.5 percent unsecured senior notes due April 2038 , $ 1.5 billion aggregate principal amount of 4.7 percent unsecured senior notes due April 2048 , and $500 million aggregate principal amount of 4.9 percent unsecured senior notes due April 2058 (collectively, the “2018 New Senior Notes”). The 2018 New Senior Notes were offered at a price to the public of 99.931 percent , 99.551 percent , 98.811 percent , 99.348 percent , and 99.289 percent of par, respectively. Also on February 8, 2018 , $4.1 billion of the net proceeds were used to repay the 364-day term loan facility, which was drawn on February 1, 2018 to fund the cash portion of the dropdown consideration. The remaining proceeds were used to repay outstanding borrowings under the MPLX Credit Agreement and the MPC Loan Agreement, as well as for general partnership purposes. Interest on each series of notes due in 2023 and 2028 is payable semi-annually in arrears on March 15 and September 15, commencing on September 15, 2018. Interest on each series of notes due in 2038, 2048 and 2058 is payable semi-annually in arrears on April 15 and October 15, commencing on October 15, 2018. On February 10, 2017, the Partnership completed a public offering of $2.25 billion aggregate principal amount of unsecured senior notes, consisting of (i) $1.25 billion aggregate principal amount of 4.125 percent senior notes due in March 2027 and (ii) $1.0 billion aggregate principal amount of 5.2 percent senior notes due in March 2047 (collectively, the “2017 New Senior Notes”). The net proceeds from the 2017 New Senior Notes totaled approximately $2.22 billion , after deducting underwriting discounts, and were used for general partnership purposes and capital expenditures. Interest on each series of the notes is payable semi-annually in arrears on March 1 and September 1, commencing on September 1, 2017. |
Revenue
Revenue | 6 Months Ended |
Jun. 30, 2018 | |
Revenue from Contract with Customer [Abstract] | |
Revenue from Contract with Customer [Text Block] | Revenue Effect of ASC 606 Adoption The Partnership adopted ASC 606 on January 1, 2018 for all contracts that were not yet completed as of the date of adoption. The details of significant changes and quantitative impact of the new revenue standard are disclosed below. • Third-party reimbursements – Third-party reimbursements, such as electricity costs, are presented gross on the income statement rather than net within cost of revenues. The gross-up for third-party reimbursements (e.g., increase in “Service revenue”; increase in “Cost of revenues”) was $86 million and $164 million for the three and six months ended June 30, 2018 , respectively. The Partnership updated the allocation between lease and non-lease components for implicit leases as a result of this ASC 606 gross up. As a result, “Rental income” and “Rental cost of sales” increased by $15 million and $31 million for the three and six months ending June 30, 2018 , respectively. • Noncash consideration – Under certain processing agreements, the Partnership is entitled to retain NGLs or other liquids from the customer. We obtain control of these NGLs and are able to direct the use of the goods. Service revenues are recorded based on the value of the NGLs received on the date the services are performed. Historically, revenue was not recorded on these arrangements until the product was sold. The impact to this change was an increase of $16 million and $27 million to “Service revenue - product related” for the three and six months ended June 30, 2018 , respectively. NGL inventory related to keep-whole volumes was also revalued as a result of this change, with a cumulative effect adjustment of $1 million and an increase to inventory of $3 million as of June 30, 2018. The increase in the inventory basis increased “Purchased product costs” by $13 million and $25 million for the three and six months ended June 30, 2018 , respectively. • Percent-of-proceeds revenues – The Partnership’s percentage of proceeds revenue received was historically recorded in product revenues. Upon adoption of ASC 606, these revenues have been classified in service revenue, as the performance obligation related to these contracts is to provide gathering and processing services. Revenues will continue to be recorded net under these arrangements as the Partnership does not control the product prior to sale. For the three and six months ended June 30, 2018 , $35 million and $68 million , respectively, was recorded in “Service revenue - product related” as opposed to “Product sales.” • Imbalances – Historically, all imbalances were recorded net. In certain instances, the Partnership’s arrangements are structured such that imbalances are cashed-out each period end which results in the transfer of control of a commodity and creates a purchase and/or sale of a commodity under ASC 606. Thus, certain imbalances will be grossed up as a result of adoption. The impact of this change was an increase of $7 million and $19 million to “Product sales” and “Purchased product costs” for the three and six months ended June 30, 2018 , respectively. • Aid in construction – Historically, all aid in construction amounts received were deferred and recognized into revenue. Payments received from non-customers will no longer be deferred as the accounting will not be subject to ASC 606. Such payments will be recorded as a reduction to “Property, plant and equipment, net.” The cumulative adjustment wrote down $3 million of “Property, plant and equipment, net.” • Oil Allowances – Historically, oil allowances were recorded when received as consideration for services performed. Under ASC 606, the Partnership does not believe such amounts represent consideration from a customer. Any excess product obtained and sold as a result of these allowances is recorded as product sales. This change decreased “Service revenues” and “Service revenues - related party” by $2 million and $3 million , and increased “Product sales” and “Product sales related party” by $2 million and $3 million for the three and six months ended June 30, 2018 , respectively. The cumulative effect of the changes made to our consolidated January 1, 2018 balance sheet for the adoption of ASC 606 was as follows: (In millions) Balance at December 31, 2017 ASC 606 Adjustment Balance at January 1, 2018 Assets Inventories $ 65 $ 1 $ 66 Property, plant and equipment, net 12,187 (3 ) 12,184 Liabilities Long-term deferred revenue 42 (3 ) 39 Equity Common unitholders - public $ 8,379 $ 1 $ 8,380 Aside from the adjustments to the opening balances noted above, the impact of adoption on the Consolidated Balance Sheets for the period ended June 30, 2018 was approximately a $3 million adjustment to “Inventories.” The disclosure of the impact of adoption on the Consolidated Statements of Income for the three and six months ended June 30, 2018 was as follows: Three Months Ended June 30, 2018 (In millions) ASC 606 Balance ASC 605 Balance Effect of Change Higher/ (Lower) Revenues and other income: Service revenue $ 410 $ 326 $ 84 Service revenue - related parties 549 551 (2 ) Service revenue - product related 51 — 51 Rental income 84 69 15 Product sales (1) 208 234 (26 ) Product sales - related parties 13 11 2 Costs and expenses: Cost of revenues (2) 233 147 86 Purchased product costs 204 184 20 Rental cost of sales 33 18 15 Depreciation and amortization 188 189 (1 ) Net income $ 456 $ 452 $ 4 Six Months Ended June 30, 2018 (In millions) ASC 606 Balance ASC 605 Balance Effect of Change Higher/ (Lower) Revenues and other income: Service revenue $ 792 $ 631 $ 161 Service revenue - related parties 1,020 1,023 (3 ) Service revenue - product related 95 — 95 Rental income 163 132 31 Product sales (1) 414 461 (47 ) Product sales - related parties 17 14 3 Costs and expenses: Cost of revenues (2) 439 275 164 Purchased product costs 391 347 44 Rental cost of sales 62 31 31 Depreciation and amortization 364 365 (1 ) Net income $ 879 $ 877 $ 2 (1) G&P “Product sales” for the three and six months ended June 30, 2018 adds back approximately $2 million and $1 million , respectively, of revenue related to derivative gains and losses and mark-to-market adjustments. (2) Excludes “Purchased product costs,” “Rental cost of sales,” “Purchases,” “Depreciation and amortization,” “General and administrative expenses,” and “Other taxes.” Disaggregation of Revenue The following table represents a disaggregation of revenue for each reportable segment for the three and six months ended June 30, 2018 : Three Months Ended June 30, 2018 (In millions) L&S G&P Total Revenues and other income: Service revenue $ 32 $ 378 $ 410 Service revenue - related parties 549 — 549 Service revenue - product related — 51 51 Product sales (1) 1 207 208 Product sales - related parties 2 11 13 Total revenues from contracts with customers $ 584 $ 647 $ 1,231 Non-ASC 606 revenue (2) 347 Total revenues and other income $ 1,578 Six Months Ended June 30, 2018 (In millions) L&S G&P Total Revenues and other income: Service revenue $ 60 $ 732 $ 792 Service revenue - related parties 1,020 — 1,020 Service revenue - product related — 95 95 Product sales (1) 2 412 414 Product sales - related parties 3 14 17 Total revenues from contracts with customers $ 1,085 $ 1,253 $ 2,338 Non-ASC 606 revenue (2) 660 Total revenues and other income $ 2,998 (1) G&P “Product sales” for the three and six months ended June 30, 2018 includes approximately $2 million and $1 million , respectively, of revenue related to derivative gains and losses and mark-to-market adjustments. (2) Non-ASC 606 Revenue includes rental income, income from equity method investments, derivative gains and losses, mark-to-market adjustments, and other income. Contract Balances Contract assets typically relate to aid in construction agreements where the revenue recognized and the Partnership’s rights to consideration for work completed exceeds the amount billed to the customer. Contract assets are generally classified as current and included in “Other current assets” on the Consolidated Balance Sheets. Contract liabilities, which we refer to as “Deferred revenue” and “Long-term deferred revenue,” typically relate to advance payments for aid in construction agreements and deferred customer credits associated with makeup rights and minimum volume commitments. Related to minimum volume commitments, breakage is estimated and recognized into service revenue in instances where it is probable the customer will not use the credit in future periods. We classify contract liabilities as current or long-term based on the timing of when we expect to recognize revenue. “Receivables, net” primarily relate to our commodity sales. Portions of the “Receivables, net” balance are attributed to the sale of commodity product controlled by the Partnership prior to sale while a significant portion of the balance relates to the sale of commodity product on behalf of our producer customers. The sales and related “Receivables, net” are commingled and excluded from the table below. The Partnership remits the net sales price back to our producer customers upon completion of the sale. Each period end, certain amounts within accounts payable relate to our payments to producer customers. Such amounts are not deemed material at period end as a result of when we settle with each producer. The table below reflects the changes in our contract balances for the period ended June 30, 2018 : (In millions) Balance at January 1, 2018 (1) Additions/ (Deletions) Revenue Recognized (2) Balance at June 30, 2018 Contract assets $ 4 $ — $ — $ 4 Deferred revenue 5 3 (3 ) 5 Deferred revenue - related parties 42 16 (18 ) 40 Long-term deferred revenue 5 1 — 6 Long-term deferred revenue - related parties $ 43 $ 4 $ — $ 47 (1) Balance represents ASC 606 portion of each respective line item. (2) No revenue was recognized related to past performance obligations in the current period. Remaining Performance Obligations The table below includes estimated revenue expected to be recognized in the future related to performance obligations that are unsatisfied (or partially unsatisfied) at the end of the reporting period. As of June 30, 2018 , the amounts allocated to contract assets and contract liabilities on the Consolidated Balance Sheets are $97 million and are reflected in the amounts below. This will be recognized as revenue as the obligations are satisfied, which is expected to occur over the next 20 years . Further, the Partnership does not disclose variable consideration due to volume variability in the table below. (In millions) Logistics & Storage Services Gathering & Processing Services (3) 2018 $ 510 $ 67 2019 1,012 129 2020 983 128 2021 982 128 2022 and thereafter 5,705 503 Total revenue on remaining performance obligations (1),(2) $ 9,192 $ 955 (1) All fixed consideration from contracts with customers is included in the amounts presented above. Variable consideration that is constrained or not required to be estimated as it reflects our efforts to perform is excluded. (2) Arrangements deemed implicit leases are included in “Rental income” and are excluded from this table. (3) Only minimum volume commitments that are deemed fixed are included in the table above. The Partnership has various minimum volume commitments in processing arrangements that vary based on the actual Btu content of the gas received. These amounts are deemed variable consideration and are excluded from the table above. Practical Expedients We do not disclose information on the future performance obligations for any contract with an original expected duration of one year or less. |
Supplemental Cash Flow Informat
Supplemental Cash Flow Information | 6 Months Ended |
Jun. 30, 2018 | |
Supplemental Cash Flow Elements [Abstract] | |
Supplemental Cash Flow Information [Text Block] | Supplemental Cash Flow Information (In millions) June 30, 2018 December 31, 2017 Cash and cash equivalents $ 3 $ 5 Restricted cash (1) 6 4 Cash, cash equivalents and restricted cash (2) $ 9 $ 9 (1) The restricted cash balance is included within “Other current assets” on the Consolidated Balance Sheets. (2) As a result of the adoption of ASU 2016-18, the Consolidated Statements of Cash Flows now explain the change during the period of both “Cash and cash equivalents” and restricted cash. Six Months Ended June 30, (In millions) 2018 2017 Net cash provided by operating activities included: Interest paid (net of amounts capitalized) $ 154 $ 99 Income taxes paid 1 — Non-cash investing and financing activities: Net transfers of property, plant and equipment from materials and supplies inventories 2 5 Contribution of fixed assets to joint venture (1) $ — $ 337 (1) Contribution of assets to Sherwood Midstream and Sherwood Midstream Holdings. See Note 5 . The Consolidated Statements of Cash Flows exclude changes to the Consolidated Balance Sheets that did not affect cash. The following is the change of additions to property, plant and equipment related to capital accruals: Six Months Ended June 30, (In millions) 2018 2017 Increase in capital accruals $ 115 $ 33 |
Accumulated Other Comprehensive
Accumulated Other Comprehensive Income | 6 Months Ended |
Jun. 30, 2018 | |
Accumulated Other Comprehensive Income (Loss) [Line Items] | |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | Accumulated Other Comprehensive Loss MPLX LP records an accumulated other comprehensive loss on the Consolidated Balance Sheets relating to pension and other post-retirement benefits provided by LOOP and Explorer to their employees. MPLX LP is not a sponsor of these benefit plans. As a transfer between entities under common control, the Partnership recorded the Joint-Interest Acquisition from MPC on the Consolidated Balance Sheets at MPC’s historical basis, which included accumulated other comprehensive loss. MPLX LP’s assumption of the accumulated other comprehensive loss balance had no effect on MPLX LP’s comprehensive income during the period as the balance was accumulated while under the ownership of MPC. The following table shows the changes in “Accumulated other comprehensive loss” by component during the period December 31, 2017 through June 30, 2018 . (In millions) Pension Benefits Other Post-Retirement Benefits Total Balance at December 31, 2017 (1) $ (13 ) $ (1 ) $ (14 ) Other comprehensive loss - remeasurements (2) (1 ) (1 ) (2 ) Balance at June 30, 2018 (1) $ (14 ) $ (2 ) $ (16 ) (1) These components of “Accumulated other comprehensive loss” are included in the computation of net periodic benefit cost by LOOP and Explorer and are therefore included on the Consolidated Statements of Income under the caption “Income from equity method investments.” (2) Components of other comprehensive loss - remeasurements relate to actuarial gains and losses as well as amortization of prior service costs. The Partnership records an adjustment to “Comprehensive income” in accordance with its ownership interest in LOOP and Explorer. |
Equity-Based Compensation Plan
Equity-Based Compensation Plan | 6 Months Ended |
Jun. 30, 2018 | |
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | |
Equity-Based Compensation Plan | Equity-Based Compensation Effective March 15, 2018 , the MPLX LP 2012 Incentive Compensation Plan (“MPLX 2012 Plan”) was replaced by the MPLX LP 2018 Incentive Compensation Plan (“MPLX 2018 Plan”). The MPLX 2018 Plan will continue in effect until February 28, 2028 , unless terminated earlier. The MPLX 2018 Plan allows for no more than 16 million common units representing limited partnership interests in the Partnership to be delivered under the plan. Phantom Units – The following is a summary of phantom unit award activity of MPLX LP common units for the six months ended June 30, 2018 : Number Weighted Outstanding at December 31, 2017 1,351,523 $ 34.53 Granted 412,348 33.84 Settled (345,111 ) 34.63 Forfeited (92,824 ) 34.64 Outstanding at June 30, 2018 1,325,936 34.29 Performance Units – The Partnership grants performance units to certain officers of the general partner and certain eligible MPC officers who make significant contributions to its business. These performance units pay out 75 percent in cash and 25 percent in MPLX LP common units and often contain both market and performance conditions based on various metrics. Market conditions are valued using a Monte Carlo valuation while performance conditions are reevaluated periodically and valued at the compensation cost associated with the performance outcome deemed most probable. During the first quarter of 2018, an award was granted; however, a grant date could not be established based on the nature of the award terms. Given that a grant date cannot be established, no expense or units have been recorded. When a grant date is established, the fair value of the award will be recognized over the remaining service period. The following is a summary of the activity for performance unit awards to be settled in MPLX LP common units for the six months ended June 30, 2018 : Number of Outstanding at December 31, 2017 2,536,594 Granted — Settled (538,594 ) Forfeited (50,000 ) Outstanding at June 30, 2018 1,948,000 |
Commitments and Contingencies
Commitments and Contingencies | 6 Months Ended |
Jun. 30, 2018 | |
Commitments and Contingencies Disclosure [Abstract] | |
Commitments and Contingencies Disclosure [Text Block] | Commitments and Contingencies The Partnership is the subject of, or a party to, a number of pending or threatened legal actions, contingencies and commitments involving a variety of matters, including laws and regulations relating to the environment. Some of these matters are discussed below. For matters for which the Partnership has not recorded an accrued liability, the Partnership is unable to estimate a range of possible losses for the reasons discussed in more detail below. However, the ultimate resolution of some of these contingencies could, individually or in the aggregate, be material. Environmental Matters – The Partnership is subject to federal, state and local laws and regulations relating to the environment. These laws generally provide for control of pollutants released into the environment and require responsible parties to undertake remediation of hazardous waste disposal sites. Penalties may be imposed for non-compliance. At June 30, 2018 and December 31, 2017 , accrued liabilities for remediation totaled $16 million and $13 million , respectively. However, it is not presently possible to estimate the ultimate amount of all remediation costs that might be incurred or the penalties, if any, which may be imposed. At December 31, 2017 , there was less than $1 million in payables to MPC for indemnification of environmental costs related to incidents occurring prior to the Initial Offering. At June 30, 2018 there was $1 million in receivables from MPC for these costs. MarkWest Liberty Midstream and its affiliates agreed in principle to pay a cash penalty of approximately $0.6 million and to undertake certain supplemental environmental projects with an estimated cost of approximately $2.4 million , related to civil enforcement allegations associated with permitting and other regulatory obligations for launcher/receiver and compressor station facilities in southeastern Ohio and western Pennsylvania. On April 24, 2018, MarkWest Liberty Midstream and its affiliates entered into a Consent Decree with the EPA and the Pennsylvania Department of Environmental Protection resolving these issues, pursuant to which MarkWest Liberty Midstream will pay a penalty of $0.6 million and undertake certain supplemental environmental projects with an estimated cost of approximately $2.4 million , in addition to other related projects that are substantially complete. The Consent Decree was approved by the court on July 9, 2018 and the penalty has been paid. The Partnership is involved in a number of other environmental enforcement matters arising in the ordinary course of business. While the outcome and impact on MPLX LP cannot be predicted with certainty, management believes the resolution of these environmental matters will not, individually or collectively, have a material adverse effect on its consolidated results of operations, financial position or cash flows. Other Lawsuits – The Partnership, MarkWest, MarkWest Liberty Midstream, MarkWest Liberty Bluestone, L.L.C., Ohio Fractionation and MarkWest Utica EMG (collectively, the “MPLX Parties”) are parties to various lawsuits with Bilfinger Westcon, Inc. (“Westcon”) that were instituted in 2016 and 2017 in the Court of Common Pleas in Butler County, Pennsylvania, the Circuit Court in Wetzel County, West Virginia, and the Court of Common Pleas in Harrison County, Ohio. The lawsuits relate to disputes regarding construction work performed by Westcon at the Bluestone, Mobley and Cadiz processing complexes in Pennsylvania, West Virginia and Ohio, respectively, and the Hopedale fractionation complex in Ohio. With respect to work performed by Westcon at the Mobley and Bluestone processing complexes, one or more of the MPLX Parties have asserted breach of contract, fraud, and with respect to work performed at the Mobley processing complex, MarkWest Liberty Midstream has also asserted negligent misrepresentation claims against Westcon. Westcon has also asserted claims against one or more of the MPLX Parties regarding these construction projects for breach of contract, unjust enrichment, promissory estoppel, fraud and constructive fraud, tortious interference with contractual relations, and civil conspiracy. Collectively, in the several cases, the MPLX Parties seek in excess of $10 million , plus an unspecified amount of punitive damages. Collectively, in the several cases, Westcon seeks in excess of $40 million , plus an unspecified amount of punitive damages. It is possible that, in connection with these lawsuits, the MPLX Parties will incur material amounts of damages. While the ultimate outcome and impact to the Partnership cannot be predicted with certainty, and the Partnership is not able to estimate a reasonably possible loss (or range of loss), if any, for these matters, the Partnership believes the resolution of these claims will not have a material adverse effect on its consolidated financial position, results of operations, or cash flows. In 2003, the State of Illinois brought an action against the Premcor Refining Group, Inc. (“Premcor”) and Apex Refining Company (“Apex”) asserting claims for environmental cleanup related to the refinery owned by these entities in the Hartford/Wood River, Illinois area. In 2006, Premcor and Apex filed third-party complaints against numerous owners and operators of petroleum products facilities in the Hartford/Wood River, Illinois area, including Marathon Pipe Line LLC (“MPL”). These complaints, which have been amended since filing, assert claims of common law nuisance and contribution under the Illinois Contribution Act and other laws for environmental cleanup costs that may be imposed on Premcor and Apex by the State of Illinois. On September 6, 2016, the trial court approved a settlement between Apex and the State of Illinois whereby Apex agreed to settle all claims against it for a $10 million payment. Premcor filed a motion for permissive appeal and requested a stay to the proceeding until the motion is ruled upon. Premcor reached a settlement with the State of Illinois in the second quarter of 2018, which has been objected to by certain third-party defendants, including MPL, and is subject to court approval. Several third-party defendants in the litigation including MPL have asserted cross-claims in contribution against the various third-party defendants. This litigation is currently pending in the Third Judicial Circuit Court, Madison County, Illinois. The trial concerning Premcor’s claims against third-party defendants, including MPL, is currently scheduled to commence September 10, 2018. A CERCLA action involving similar claims is also pending in federal court in Illinois. While the ultimate outcome of these litigated matters remains uncertain, neither the likelihood of an unfavorable outcome nor the ultimate liability, if any, with respect to this matter can be determined at this time and the Partnership is unable to estimate a reasonably possible loss (or range of loss) for this litigation. Under the omnibus agreement, MPC will indemnify the Partnership for the full cost of any losses should MPL be deemed responsible for any damages in this lawsuit. The Partnership is also a party to a number of other lawsuits and other proceedings arising in the ordinary course of business. While the ultimate outcome and impact to the Partnership cannot be predicted with certainty, the Partnership believes the resolution of these other lawsuits and proceedings will not have a material adverse effect on its consolidated financial position, results of operations or cash flows. Guarantees – Over the years, the Partnership has sold various assets in the normal course of its business. Certain of the related agreements contain performance and general guarantees, including guarantees regarding inaccuracies in representations, warranties, covenants and agreements, and environmental and general indemnifications that require the Partnership to perform upon the occurrence of a triggering event or condition. These guarantees and indemnifications are part of the normal course of selling assets. The Partnership is typically not able to calculate the maximum potential amount of future payments that could be made under such contractual provisions because of the variability inherent in the guarantees and indemnities. Most often, the nature of the guarantees and indemnities is such that there is no appropriate method for quantifying the exposure because the underlying triggering event has little or no past experience upon which a reasonable prediction of the outcome can be based. Contractual Commitments and Contingencies – At June 30, 2018 , the Partnership’s contractual commitments to acquire property, plant and equipment totaled $698 million . These commitments were primarily related to plant expansion projects for the Marcellus and Southwest Operations. In addition, from time to time and in the ordinary course of business, the Partnership and its affiliates provide guarantees of the Partnership’s subsidiaries payment and performance obligations in the G&P segment. Certain natural gas processing and gathering arrangements require the Partnership to construct new natural gas processing plants, natural gas gathering pipelines and NGL pipelines and contain certain fees and charges if specified construction milestones are not achieved for reasons other than force majeure. In certain cases, certain producers may have the right to cancel the processing arrangements if there are significant delays that are not due to force majeure. As of June 30, 2018 , management does not believe there are any indications that the Partnership will not be able to meet the construction milestones, that force majeure does not apply or that such fees and charges will otherwise be triggered. |
Summary of Principal Accounti29
Summary of Principal Accounting Policies (Policies) | 6 Months Ended |
Jun. 30, 2018 | |
Accounting Policies [Abstract] | |
Use of Estimates | The accompanying interim consolidated financial statements are unaudited; however, in the opinion of the Partnership’s management, these statements reflect all adjustments necessary for a fair statement of the results for the periods reported. All such adjustments are of a normal, recurring nature unless otherwise disclosed. These interim consolidated financial statements, including the notes, have been prepared in accordance with the rules and regulations of the SEC applicable to interim period financial statements and do not include all of the information and disclosures required by GAAP for complete financial statements. |
Earnings Per Share | In preparing the Consolidated Statements of Equity, net income attributable to MPLX LP is allocated to preferred unitholders based on a fixed distribution schedule, as discussed in Note 9 . Prior to 2018 , when distributions related to the IDRs were made, earnings equal to the amount of those distributions were first allocated to the general partner before the remaining earnings were allocated to the limited partner unitholders based on their respective ownership percentages. Subsequent to the conversion of the general partner to a non-economic interest as described in Note 8 , no earnings will be allocated to the general partner. Distributions, although earned, are not accrued until declared. The allocation of net income attributable to MPLX LP for purposes of calculating net income per limited partner unit is described in Note 7 . Net income/(loss) per unit applicable to common limited partner units is computed by dividing net income/(loss) attributable to MPLX LP less income/(loss) allocated to participating securities by the weighted average number of common units outstanding. The classes of participating securities include common units, Series A Convertible Preferred units (the "Preferred units") and certain equity-based compensation awards; and in prior periods, general partner units and IDRs. |
Revenue Recognition | Revenue Recognition – As a result of the adoption of the new revenue recognition standard, as described further in Note 3 , the Partnership has updated its policies as they relate to revenue recognition. Revenue is measured based on consideration specified in a contract with a customer. The Partnership recognizes revenue when it satisfies a performance obligation by transferring control over a product or providing services to a customer. The Partnership enters into a variety of contract types in order to generate “Product sales” and “Service revenue.” The Partnership provides services under the following types of arrangements: • Fee-based arrangements – Under fee-based arrangements, the Partnership receives a fee or fees for one or more of the following services: gathering, processing and transportation of natural gas; gathering, transportation, fractionation, exchange and storage of NGLs; and transportation, storage and distribution of crude oil, refined products and other hydrocarbon-based products. The revenue the Partnership earns from these arrangements is generally directly related to the volume of natural gas, NGLs, refined products or crude oil that is handled by or flows through the Partnership’s systems and facilities and is not normally directly dependent on commodity prices. In certain cases, the Partnership’s arrangements provide for minimum annual payments or fixed demand charges. Fee-based arrangements are reported as “Service revenue” on the Consolidated Statements of Income. Revenue is recognized over time as services are performed in a series. In certain instances when specifically stated in the contract terms, the Partnership purchases product after fee-based services have been provided. Revenue from the sale of products purchased after services are provided is reported as “Product sales” on the Consolidated Statements of Income and recognized on a gross basis, as the Partnership takes control of the product and is the principal in the transaction. • Percent-of-proceeds arrangements – Under percent-of-proceeds arrangements, the Partnership: gathers and processes natural gas on behalf of producers; sells the resulting residue gas, condensate and NGLs at market prices; and remits to producers an agreed-upon percentage of the proceeds. In other cases, instead of remitting cash payments to the producer, the Partnership delivers an agreed-upon percentage of the residue gas and NGLs to the producer (take-in-kind arrangements) and sells the volumes the Partnership retains to third parties. Revenue is recognized on a net basis when the Partnership acts as an agent and does not have control of the gross amount of gas and/or NGLs prior to it being sold. Percent-of-proceeds revenue is reported as “Service revenue - product related” on the Consolidated Statements of Income. • Keep-whole arrangements – Under keep-whole arrangements, the Partnership gathers natural gas from the producer, processes the natural gas and sells the resulting condensate and NGLs to third parties at market prices. Because the extraction of the condensate and NGLs from the natural gas during processing reduces the Btu content of the natural gas, the Partnership must either purchase natural gas at market prices for return to producers or make cash payment to the producers equal to the value of the energy content of this natural gas. Certain keep-whole arrangements also have provisions that require the Partnership to share a percentage of the keep-whole profits with the producers based on the oil to gas ratio or the NGL to gas ratio. “Service revenue - product related” is recorded based on the value of the NGLs received on the date the services are performed. Natural gas purchased to return to the producer and shared NGL profits are recorded as a reduction of “Service revenue - product related” in the Consolidated Statements of Income on the date the services are performed. Sales of NGLs under these arrangements are reported as “Product sales” on the Consolidated Statements of Income and are reported on a gross basis as the Partnership is the principal in the arrangement and controls the product prior to sale. The sale of the NGLs may occur shortly after services are performed at the tailgate of the plant, or after a period of time as determined by the Partnership. • Purchase arrangements – Under purchase arrangements, the Partnership purchases natural gas at either the wellhead or the tailgate of a plant. The Partnership then gathers and delivers the natural gas to pipelines where the Partnership may resell the natural gas. Wellhead purchase arrangements represent an arrangement with a supplier and are recorded in “Purchased product costs.” Often, the Partnership earns fees for services performed prior to taking control of the product in these arrangements and “Service revenue” is recorded for these fees. Revenue generated from the sale of product obtained in tailgate purchase arrangements is reported as “Product sales” on the Consolidated Statements of Income and is recognized on a gross basis as the Partnership purchases and takes control of the product prior to sale and is the principal in the transaction. In many cases, the Partnership provides services under contracts that contain a combination of more than one of the arrangements described above. When fees are charged (in addition to product received) under percent-of-proceeds arrangements, keep-whole arrangements or purchase arrangements, the Partnership records such fees as “Service revenue” on the Consolidated Statements of Income. The terms of the Partnership’s contracts vary based on gas quality conditions, the competitive environment when the contracts are signed and customer requirements. Performance obligations are determined based on the specific terms of the arrangements, economics of the geographical regions, and the services offered and whether they are deemed distinct. The Partnership allocates the consideration earned between the performance obligations based on the stand-alone selling price when multiple performance obligations are identified. Revenue from the Partnership’s service arrangements will generally be recognized over time when the performance obligation is satisfied as services are provided in a series. The Partnership has elected to use the output measure of progress to recognize revenue based on the units delivered, processed or transported. The transaction price has fixed components related to minimum volume commitments and variable components which are primarily dependent on volumes. Variable consideration will generally not be estimated at contract inception as the transaction price is specifically allocable to the services provided each period end. In instances in which tiered pricing structures do not reflect our efforts to perform, the Partnership will estimate variable consideration at contract inception. “Product sales” will be recognized at a point in time when control of the product transfers to the customer. Minimum volume commitments may create contract liabilities or deferred credits if current period payments can be used for future services. Breakage is estimated and recognized into service revenue in instances where it is probable the customer will not use the credit in future periods. Amounts billed to customers for shipping and handling, electricity, and other costs to perform services are included in “Service revenue” on the Consolidated Statements of Income. Shipping and handling costs associated with product sales are included in “Purchased product costs” on the Consolidated Statements of Income. Facility expenses, costs of revenues and depreciation represent those expenses related to operating our various facilities and are necessary to provide both “Product sales” and “Service revenue.” Customers usually pay monthly based on the products purchased or services performed that month. Taxes collected from customers and remitted to the appropriate taxing authority are excluded from revenue. Based on the terms of certain natural gas gathering, transportation and processing agreements, the Partnership is considered to be the lessor under several implicit operating lease arrangements in accordance with GAAP. Revenue and costs related to the portion of the revenue earned under these contracts considered to be implicit leases are recorded as “Rental income” and “Rental cost of sales,” respectively, on the Consolidated Statements of Income. The allocation method used to allocate income between lease and non-lease components was updated as a result of ASC Topic 606, “Revenue from Contracts with Customers” (“ASC 606”). Similarly, the Partnership is considered to be the lessor under implicit operating lease arrangements with MPC in accordance with GAAP. Revenue related to these agreements is recorded as “Rental income - related parties” on the Consolidated Statements of Income. “Rental income” and “Rental income - related parties” are not deemed to be revenue from contracts with customers. The Partnership routinely makes accruals based on estimates for both revenue and expenses due to the timing of compiling billing information, receiving certain third-party information and reconciling the Partnership’s records with those of third parties. The delayed information from third parties includes among other things; actual volumes purchased, transported or sold; adjustments to inventory and invoices for purchases; actual natural gas and NGL deliveries; and other operating expenses. The Partnership makes accruals to reflect estimates for these items based on its internal records and information from third parties. Estimated accruals are adjusted when actual information is received from third parties and the Partnership’s internal records have been reconciled. |
Acquisitions (Tables)
Acquisitions (Tables) | 6 Months Ended |
Jun. 30, 2018 | |
Business Combinations [Abstract] | |
Business Acquisition, Pro Forma Information [Table Text Block] | The amounts of revenue and income from operations associated with these investments included in the Consolidated Statements of Income, since the February 1, 2018 acquisition date, were as follows: (In millions) Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 Revenues and other income $ 364 $ 629 Income from operations $ 232 $ 413 |
Equity Method Investments (Tabl
Equity Method Investments (Tables) | 6 Months Ended |
Jun. 30, 2018 | |
Schedule of Equity Method Investments [Line Items] | |
Equity Method Investments [Table Text Block] | The following table presents the Partnership’s equity method investments at the dates indicated: Ownership as of Carrying value at June 30, June 30, December 31, (In millions) 2018 2018 2017 Centrahoma Processing LLC 40% $ 123 $ 121 Explorer 25% 95 89 Illinois Extension 35% 285 284 LOCAP 59% 27 24 LOOP 41% 226 225 MarEn Bakken 25% 508 520 MarkWest EMG Jefferson Dry Gas Gathering Company, L.L.C. 67% 194 164 MarkWest Utica EMG, L.L.C. 56% 2,092 2,139 Ohio Condensate Company, L.L.C. 60% 11 11 Panola Pipeline Company, LLC 15% 23 24 Sherwood Midstream LLC 50% 291 236 Sherwood Midstream Holdings LLC 63% 155 165 Other 12 8 Total $ 4,042 $ 4,010 |
Summarized Financial Information For Equity Method Investees Table [Table Text Block] | Summarized financial information for the Partnership’s equity method investments for the six months ended June 30, 2018 and 2017 is as follows: Six Months Ended June 30, 2018 (In millions) MarkWest Utica EMG, L.L.C. Other VIEs Non-VIEs Total Revenues and other income $ 117 $ 92 $ 589 $ 798 Costs and expenses 89 38 305 432 Income from operations 28 54 284 366 Net income 27 54 256 337 Income/(loss) from equity method investments (1) $ (4 ) $ 30 $ 85 $ 111 Six Months Ended June 30, 2017 (In millions) MarkWest Utica EMG, L.L.C. Other VIEs Non-VIEs Total Revenues and other income $ 88 $ 21 $ 91 $ 200 Costs and expenses 48 17 73 138 Income from operations 40 4 18 62 Net income 40 4 17 61 Income/(loss) from equity method investments (1) $ 2 $ (1 ) $ 5 $ 6 (1) “Income/(loss) from equity method investments” includes the impact of any basis differential amortization or accretion. Summarized balance sheet information for the Partnership’s equity method investments as of June 30, 2018 and December 31, 2017 is as follows: June 30, 2018 (In millions) MarkWest Utica EMG, L.L.C. (1) Other VIEs Non-VIEs Total Current assets $ 78 $ 58 $ 353 $ 489 Noncurrent assets 2,007 1,109 4,616 7,732 Current liabilities 30 86 187 303 Noncurrent liabilities $ 5 $ 10 $ 871 $ 886 December 31, 2017 (In millions) MarkWest Utica EMG, L.L.C. (1) Other VIEs Non-VIEs Total Current assets $ 65 $ 46 $ 399 $ 510 Noncurrent assets 2,077 930 4,624 7,631 Current liabilities 39 44 220 303 Noncurrent liabilities $ 3 $ 11 $ 904 $ 918 (1) MarkWest Utica EMG, L.L.C.’s (“MarkWest Utica EMG”) noncurrent assets include its investment in its subsidiary, Ohio Gathering Company, L.L.C. (“Ohio Gathering”), which does not appear elsewhere in this table. The investment was $769 million and $790 million as of June 30, 2018 and December 31, 2017 , respectively. |
Related Party Agreements and 32
Related Party Agreements and Transactions (Tables) | 6 Months Ended |
Jun. 30, 2018 | |
Related Party Transactions [Abstract] | |
Schedule of Sales to Related Parties | Revenue received from related parties related to service and product sales were as follows: Three Months Ended June 30, Six Months Ended June 30, (In millions) 2018 2017 2018 2017 Service revenues MPC $ 549 $ 270 $ 1,020 $ 525 Rental income MPC 190 70 335 137 Product sales (1) MPC $ 13 $ 2 $ 17 $ 4 (1) There were additional product sales to MPC that net to zero within the consolidated financial statements as the transactions are recorded net due to the terms of the agreements under which such product was sold. For the three and six months ended June 30, 2018 , these sales totaled $112 million and $191 million , respectively. For the three and six months ended June 30, 2017 , these sales totaled $53 million and $110 million , respectively. |
Summary of Fees Received from Related Parties Included in Other Income - Related Parties | The revenue received from these related parties, included in “Other income - related parties” on the Consolidated Statements of Income, was as follows: Three Months Ended June 30, Six Months Ended June 30, (In millions) 2018 2017 2018 2017 MPC $ 10 $ 10 $ 20 $ 21 MarkWest Utica EMG 4 4 8 8 Ohio Gathering 4 4 8 8 Jefferson Dry Gas 2 2 3 3 Sherwood Midstream 2 3 5 4 Other 2 2 3 3 Total $ 24 $ 25 $ 47 $ 47 |
Schedule of Entity Wide Information Allocated Related Party Omnibus Agreement Costs by Income Stmt Line [Table Text Block] | Charges for services included in “General and administrative expenses” primarily relate to services that support the Partnership’s executive management, accounting and human resources activities. These charges were as follows: Three Months Ended June 30, Six Months Ended June 30, (In millions) 2018 2017 2018 2017 Purchases - related parties $ 43 $ 18 $ 79 $ 33 General and administrative expenses 17 11 33 19 Total $ 60 $ 29 $ 112 $ 52 |
Summary of Related Party Costs Added to Property, Plant and Equipment | The costs added to “Property, plant and equipment, net” were as follows: Three Months Ended June 30, Six Months Ended June 30, (In millions) 2018 2017 2018 2017 MPC $ 41 $ 12 $ 63 $ 22 |
Schedule of Employee Services Expenses from Related Parties | These charges were as follows: Three Months Ended June 30, Six Months Ended June 30, (In millions) 2018 2017 2018 2017 Rental cost of sales - related parties $ — $ 1 $ 1 $ 1 Purchases - related parties 133 91 247 183 General and administrative expenses 27 24 50 49 Total $ 160 $ 116 $ 298 $ 233 |
Schedule of Entity Wide Information Purchases From Related Parties | The following table shows other purchases from MPC classified as “Purchases - related parties.” These purchases include product purchases, payments made to MPC in its capacity as general contractor to MPLX LP, and certain rent and lease agreements. Three Months Ended June 30, Six Months Ended June 30, (In millions) 2018 2017 2018 2017 MPC $ 47 $ — $ 74 $ — |
Schedule of Receivables from Related Parties | Receivables from related parties were as follows: (In millions) June 30, 2018 December 31, 2017 MPC $ 286 $ 153 MarkWest Utica EMG 1 1 Ohio Gathering 3 2 Jefferson Dry Gas 1 2 Sherwood Midstream Holdings — — Other 3 2 Total $ 294 $ 160 |
Schedule of Long Term Receivables with Related Parties | Long-term receivables with related parties, which includes straight-line rental income, were as follows: (In millions) June 30, 2018 December 31, 2017 MPC $ 22 $ 20 |
Schedule of Payables to Related Parties | Payables to related parties were as follows: (In millions) June 30, 2018 December 31, 2017 MPC $ 239 $ 470 MarkWest Utica EMG 26 29 Ohio Gathering — 8 Sherwood Midstream 8 8 Other — 1 Total $ 273 $ 516 Other current assets included $5 million and $8 million of related party prepaid insurance as of June 30, 2018 and December 31, 2017 , respectively. From time to time, the Partnership may also sell to or purchase from related parties assets and inventory at the lesser of average unit cost or net realizable value. Sales to related parties for the six months ended June 30, 2018 and 2017 were $3 million and $4 million , respectively. Purchases from related parties during the six months ended June 30, 2018 and 2017 were approximately $1 million and $5 million , respectively. |
Summary of Deferred Revenue - Related Parties | The “Deferred revenue - related parties” balance associated with the minimum volume deficiencies and project reimbursements were as follows: (In millions) June 30, 2018 December 31, 2017 Minimum volume deficiencies - MPC $ 40 $ 53 Project reimbursements - MPC 48 33 Total $ 88 $ 86 |
Net Income Per Limited Partne33
Net Income Per Limited Partner Unit (Tables) | 6 Months Ended |
Jun. 30, 2018 | |
Earnings Per Share [Abstract] | |
Schedule of Distributions By Partner By Class | For the three and six months ended June 30, 2018 , the Partnership had dilutive potential common units consisting of certain equity-based compensation awards. For the three and six months ended June 30, 2017 , the Partnership had dilutive potential common units consisting of certain equity-based compensation awards and Class B units. Potential common units omitted from the diluted earnings per unit calculation for the three and six months ended June 30, 2018 and June 30, 2017 were less than 1 million . Three Months Ended June 30, Six Months Ended June 30, (In millions) 2018 2017 2018 2017 Net income attributable to MPLX LP $ 453 $ 190 $ 874 $ 340 Less: Limited partners’ distributions declared on Preferred units (1) 20 17 36 33 General partner’s distributions declared (including IDRs) (1) — 76 — 141 Limited partners’ distributions declared on common units (including common units of general partner) (1) 497 218 964 416 Undistributed net loss attributable to MPLX LP $ (64 ) $ (121 ) $ (126 ) $ (250 ) (1) See Note 8 for distribution information. |
Schedule of Basic and Diluted Earnings Per Unit | Three Months Ended June 30, 2018 (In millions, except per unit data) Limited Partners’ Common Units Redeemable Preferred Units Total Basic and diluted net income attributable to MPLX LP per unit: Net income attributable to MPLX LP: Distributions declared $ 497 $ 20 $ 517 Undistributed net loss attributable to MPLX LP (64 ) — (64 ) Net income attributable to MPLX LP (1) $ 433 $ 20 $ 453 Weighted average units outstanding: Basic 794 31 825 Diluted 794 31 825 Net income attributable to MPLX LP per limited partner unit: Basic $ 0.55 Diluted $ 0.55 Three Months Ended June 30, 2017 (In millions, except per unit data) General Partner Limited Partners’ Common Units Redeemable Preferred Units Total Basic and diluted net income attributable to MPLX LP per unit: Net income attributable to MPLX LP: Distributions declared (including IDRs) $ 76 $ 218 $ 17 $ 311 Undistributed net loss attributable to MPLX LP (2 ) (119 ) — (121 ) Net income attributable to MPLX LP (1) $ 74 $ 99 $ 17 $ 190 Weighted average units outstanding: Basic 8 377 31 416 Diluted 8 382 31 421 Net income attributable to MPLX LP per limited partner unit: Basic $ 0.26 Diluted $ 0.26 Six Months Ended June 30, 2018 (In millions, except per unit data) Limited Redeemable Preferred Units Total Basic and diluted net income attributable to MPLX LP per unit: Net income attributable to MPLX LP: Distributions declared $ 964 $ 36 $ 1,000 Undistributed net loss attributable to MPLX LP (126 ) — (126 ) Net income attributable to MPLX LP (1) $ 838 $ 36 $ 874 Weighted average units outstanding: Basic 728 31 759 Diluted 728 31 759 Net income attributable to MPLX LP per limited partner unit: Basic $ 1.15 Diluted $ 1.15 Six Months Ended June 30, 2017 (In millions, except per unit data) General Limited Redeemable Preferred Units Total Basic and diluted net income attributable to MPLX LP per unit: Net income attributable to MPLX LP: Distributions declared (including IDRs) $ 141 $ 416 $ 33 $ 590 Undistributed net loss attributable to MPLX LP (5 ) (245 ) — (250 ) Net income attributable to MPLX LP (1) $ 136 $ 171 $ 33 $ 340 Weighted average units outstanding: Basic 8 370 31 409 Diluted 8 374 31 413 Net income attributable to MPLX LP per limited partner unit: Basic $ 0.46 Diluted $ 0.46 (1) Allocation of net income attributable to MPLX LP assumes all earnings for the period had been distributed based on the current period distribution priorities. |
Equity (Tables)
Equity (Tables) | 6 Months Ended |
Jun. 30, 2018 | |
Equity [Abstract] | |
Schedule of Stockholders Equity [Table Text Block] | The changes in the number of units outstanding during the six months ended June 30, 2018 are summarized below: (In units) Common General Partner Total Balance at December 31, 2017 407,130,020 8,308,773 415,438,793 Unit-based compensation awards (1) 239,095 140 239,235 Contribution of refining logistics and fuels distribution assets (2) 111,611,111 2,277,778 113,888,889 Conversion of GP economic interests 275,000,000 (10,586,691 ) 264,413,309 Balance at June 30, 2018 793,980,226 — 793,980,226 (1) As a result of the unit-based compensation awards issued during the first quarter, MPLX GP contributed less than $1 million in exchange for 140 general partner units to maintain its two percent GP Interest. (2) MPC agreed to waive approximately one-third of the first quarter 2018 distributions on the common units issued in connection with this transaction. As a result of this waiver, MPC did not receive $23.7 million of the distributions that would have otherwise accrued on such common units with respect to the first quarter 2018 . See Note 4 for information regarding this acquisition. |
Schedule Of Calculation Of Net Income Applicable to Partners [Table Text Block] | The following table presents the allocation of the general partner’s GP Interest in net income attributable to MPLX LP, for income statement periods occurring prior to the exchange of the GP economic interests: Three Months Ended June 30, Six Months Ended June 30, (In millions) 2017 2017 Net income attributable to MPLX LP $ 190 $ 340 Less: Preferred unit distributions 17 33 General partner's IDRs and other 72 133 Net income attributable to MPLX LP available to general and limited partners 101 174 General partner's two percent GP Interest in net income attributable to MPLX LP 2 3 General partner's IDRs and other 72 133 General partner's GP Interest in net income attributable to MPLX LP $ 74 $ 136 |
Distributions Made to Limited Partner, by Distribution [Table Text Block] | The allocation of total quarterly cash distributions to general, limited and preferred unitholders is as follows for the three and six months ended June 30, 2018 and 2017 . The Partnership’s distributions are declared subsequent to quarter end; therefore, the following table represents total cash distributions applicable to the period in which the distributions were earned. Three Months Ended June 30, Six Months Ended June 30, (In millions) 2018 2017 2018 2017 General partner's distributions: General partner's distributions on general partner units $ — $ 6 $ — $ 11 General partner's distributions on IDRs — 70 — 130 Total distribution on general partner units and IDRs — 76 — 141 Common and preferred unit distributions: Common unitholders, includes common units of general partner 497 218 964 416 Preferred unit distributions 20 17 36 33 Total cash distributions declared $ 517 $ 311 $ 1,000 $ 590 |
Redeemable Preferred Units (Tab
Redeemable Preferred Units (Tables) | 6 Months Ended |
Jun. 30, 2018 | |
Temporary Equity Disclosure [Abstract] | |
Rollforward of Redeemable Preferred Units | The changes in the redeemable preferred balance from December 31, 2017 through June 30, 2018 are summarized below: (In millions) Redeemable Preferred Units Balance at December 31, 2017 $ 1,000 Net income 36 Distributions received by preferred unitholders (33 ) Balance at June 30, 2018 $ 1,003 |
Segment Information (Tables)
Segment Information (Tables) | 6 Months Ended |
Jun. 30, 2018 | |
Segment Reporting [Abstract] | |
Schedule of Segment Reporting Information, by Segment [Table Text Block] | The tables below present information about revenues and other income, capital expenditures and total assets for our reportable segments: Three Months Ended June 30, Six Months Ended June 30, (In millions) 2018 2017 2018 2017 L&S Service revenue $ 581 $ 302 $ 1,080 $ 580 Rental income 190 70 335 137 Product related revenue 3 — 5 — Income from equity method investments 36 — 80 — Other income 12 12 24 24 Total segment revenues and other income 822 384 1,524 741 Segment adjusted EBITDA (1) 526 184 963 326 Maintenance capital expenditures 25 19 47 27 Growth capital expenditures 93 115 247 220 G&P Service revenue 378 254 732 491 Rental income 84 70 163 139 Product related revenue 267 193 520 398 Income from equity method investments 14 1 31 6 Other income 13 14 28 27 Total segment revenues and other income 756 532 1,474 1,061 Segment adjusted EBITDA (1) 341 290 664 571 Maintenance capital expenditures 8 4 11 8 Growth capital expenditures 406 265 677 431 Equity method investment capital expenditures $ 113 $ 81 $ 167 $ 205 |
Reconciliation of Other Significant Reconciling Items from Segments to Consolidated [Table Text Block] | Three Months Ended June 30, Six Months Ended June 30, (In millions) 2018 2017 2018 2017 Reconciliation to Net income: L&S segment adjusted EBITDA $ 526 $ 184 $ 963 $ 326 G&P segment adjusted EBITDA 341 290 664 571 Total reportable segments 867 474 1,627 897 Depreciation and amortization (188 ) (164 ) (364 ) (351 ) Provision for income taxes (1 ) (2 ) (5 ) (2 ) Amortization of deferred financing costs (15 ) (13 ) (31 ) (25 ) Non-cash equity-based compensation (5 ) (3 ) (9 ) (6 ) Net interest and other financial costs (136 ) (74 ) (250 ) (140 ) Income from equity method investments 50 1 111 6 Distributions/adjustments related to equity method investments (112 ) (33 ) (202 ) (66 ) Unrealized derivative (loss)/gain (1) (8 ) 3 (1 ) 19 Acquisition costs — — (3 ) (4 ) Adjusted EBITDA attributable to noncontrolling interests 4 2 6 3 Adjusted EBITDA attributable to Predecessor (2) — — — 47 Net income $ 456 $ 191 $ 879 $ 378 (1) The Partnership makes a distinction between realized or unrealized gains and losses on derivatives. During the period when a derivative contract is outstanding, changes in the fair value of the derivative are recorded as an unrealized gain or loss. When a derivative contract matures or is settled, the previously recorded unrealized gain or loss is reversed and the realized gain or loss of the contract is recorded. (2) The adjusted EBITDA adjustments related to Predecessor are excluded from adjusted EBITDA attributable to MPLX LP prior to the acquisition date. |
Reconciliation of Assets from Segment to Consolidated [Table Text Block] | (In millions) June 30, 2018 December 31, 2017 Segment assets Cash and cash equivalents $ 3 $ 5 L&S (2) 5,982 4,611 G&P (2) 15,427 14,884 Total assets $ 21,412 $ 19,500 (1) See the following reconciliation from segment adjusted EBITDA to “Net income.” (2) Equity method investments included in L&S assets were $1.14 billion at June 30, 2018 and $1.15 billion at December 31, 2017 . Equity method investments included in G&P assets were $2.90 billion at June 30, 2018 and $2.86 billion at December 31, 2017 . |
Inventories (Tables)
Inventories (Tables) | 6 Months Ended |
Jun. 30, 2018 | |
Inventory Disclosure [Abstract] | |
Summary of Inventories | Inventories consist of the following: (In millions) June 30, 2018 December 31, 2017 NGLs $ 8 $ 4 Line fill 9 8 Spare parts, materials and supplies 56 53 Total inventories $ 73 $ 65 |
Property, Plant and Equipment (
Property, Plant and Equipment (Tables) | 6 Months Ended |
Jun. 30, 2018 | |
Property, Plant and Equipment [Abstract] | |
Summary of Property, Plant and Equipment | Property, plant and equipment with associated accumulated depreciation is shown below: (In millions) June 30, 2018 December 31, 2017 Natural gas gathering and NGL transportation pipelines and facilities $ 5,353 $ 5,178 Processing, fractionation and storage facilities 4,885 3,893 Pipelines and related assets 2,432 2,253 Barges and towing vessels 597 490 Terminals and related assets 831 821 Refinery and related assets 922 — Land, building, office equipment and other 892 770 Construction-in-progress 1,062 1,057 Total 16,974 14,462 Less accumulated depreciation 3,332 2,275 Property, plant and equipment, net $ 13,642 $ 12,187 |
Fair Value Measurements (Tables
Fair Value Measurements (Tables) | 6 Months Ended |
Jun. 30, 2018 | |
Fair Value Disclosures [Abstract] | |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] | The following table presents the financial instruments carried at fair value on a recurring basis as of June 30, 2018 and December 31, 2017 by fair value hierarchy level. The Partnership has elected to offset the fair value amounts recognized for multiple derivative contracts executed with the same counterparty. June 30, 2018 December 31, 2017 (In millions) Assets Liabilities Assets Liabilities Significant unobservable inputs (Level 3) Commodity contracts $ — $ (2 ) $ — $ (2 ) Embedded derivatives in commodity contracts — (66 ) — (64 ) Total carrying value in Consolidated Balance Sheets $ — $ (68 ) $ — $ (66 ) |
Fair Value Inputs Assets and Liabilities Quantitative Information [Table Text Block] | Level 3 instruments include all NGL transactions and embedded derivatives in commodity contracts. The embedded derivative liability relates to a natural gas purchase agreement embedded in a keep-whole processing agreement. The fair value calculation for these Level 3 instruments used significant unobservable inputs including: (1) NGL prices interpolated and extrapolated due to inactive markets ranging from $0.70 to $1.58 per gallon and (2) the probability of renewal of 65 percent for the first five -year term, and assuming renewal of the first term, an 84 percent probability of renewal for the second five -year term of the gas purchase agreement and related keep-whole processing agreement. For commodity contracts, increases in forward NGL prices result in a decrease in the fair value of the derivative assets and an increase in the fair value of derivative liabilities. Increases or decreases in the fractionation spread result in an increase or decrease in the fair value of the embedded derivative liability. An increase in the probability of renewal would result in an increase in the fair value of the related embedded derivative liability. |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] | The following table is a reconciliation of the net beginning and ending balances recorded for net assets and liabilities classified as Level 3 in the fair value hierarchy. Three Months Ended June 30, 2018 Three Months Ended June 30, 2017 (In millions) Commodity Derivative Contracts (net) Embedded Derivatives in Commodity Contracts (net) Commodity Derivative Contracts (net) Embedded Derivatives in Commodity Contracts (net) Fair value at beginning of period $ (2 ) $ (58 ) $ — $ (44 ) Total (losses)/gains (realized and unrealized) included in earnings (1) (1 ) (11 ) 2 — Settlements 1 3 — 1 Fair value at end of period (2 ) (66 ) 2 (43 ) The amount of total (losses)/gains for the period included in earnings attributable to the change in unrealized (losses)/gains relating to liabilities still held at end of period $ (1 ) $ (10 ) $ 2 $ (1 ) Six Months Ended June 30, 2018 Six Months Ended June 30, 2017 (In millions) Commodity Derivative Contracts (net) Embedded Derivatives in Commodity Contracts (net) Commodity Derivative Contracts (net) Embedded Derivatives in Commodity Contracts (net) Fair value at beginning of period $ (2 ) $ (64 ) $ (6 ) $ (54 ) Total (losses)/gains (realized and unrealized) included in earnings (1) (1 ) (8 ) 7 8 Settlements 1 6 1 3 Fair value at end of period (2 ) (66 ) 2 (43 ) The amount of total (losses)/gains for the period included in earnings attributable to the change in unrealized (losses)/gains relating to liabilities still held at end of period $ — $ (5 ) $ 5 $ 7 (1) Gains and losses on Commodity Derivative Contracts classified as Level 3 are recorded in “Product sales” on the Consolidated Statements of Income. Gains and losses related to derivatives embedded in commodity contracts are recorded in “Purchased product costs” and “Cost of revenues” |
Fair Value Carrying Value by Balance Sheet Grouping [Table Text Block] | The following table summarizes the fair value and carrying value of the long-term debt, excluding capital leases, and SMR liability: June 30, 2018 December 31, 2017 (In millions) Fair Value Carrying Value Fair Value Carrying Value Long-term debt $ 12,021 $ 11,946 $ 7,718 $ 6,966 SMR liability $ 97 $ 89 $ 104 $ 91 |
Derivative Financial Instrume40
Derivative Financial Instruments (Tables) | 6 Months Ended |
Jun. 30, 2018 | |
Derivative Instruments and Hedging Activities Disclosure [Abstract] | |
Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] | As of June 30, 2018 , the Partnership had the following outstanding commodity contracts that were executed to manage the cash flow risk associated with future sales of NGLs and purchases of natural gas: Derivative contracts not designated as hedging instruments Financial Position Notional Quantity (net) Natural Gas (MMBtu) Long 467,559 NGLs (Gal) Short 4,830,001 |
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] | The impact of the Partnership’s derivative instruments on its Consolidated Balance Sheets is summarized below: (In millions) June 30, 2018 December 31, 2017 Derivative contracts not designated as hedging instruments and their balance sheet location Asset Liability Asset Liability Commodity contracts (1) Other current assets / Other current liabilities $ — $ (14 ) $ — $ (14 ) Other noncurrent assets / Deferred credits and other liabilities — (54 ) — (52 ) Total $ — $ (68 ) $ — $ (66 ) (1) Includes embedded derivatives in commodity contracts as discussed above. |
Derivative Instruments, Gain (Loss) [Table Text Block] | The impact of the Partnership’s derivative contracts not designated as hedging instruments and the location of gains and losses recognized on the Consolidated Statements of Income is summarized below: Three Months Ended June 30, Six Months Ended June 30, (In millions) 2018 2017 2018 2017 Product sales Realized loss $ (1 ) $ — $ (1 ) $ (1 ) Unrealized gain — 2 1 9 Total derivative (loss)/gain related to product sales (1 ) 2 — 8 Purchased product costs Realized loss (3 ) (2 ) (6 ) (4 ) Unrealized (loss)/gain (8 ) 1 (2 ) 10 Total derivative (loss)/gain related to purchased product costs (11 ) (1 ) (8 ) 6 Cost of revenues Realized (loss)/gain — — — — Unrealized (loss)/gain — — — — Total derivative (loss)/gain related to cost of revenues — — — — Total derivative (loss)/gain $ (12 ) $ 1 $ (8 ) $ 14 |
Debt (Tables)
Debt (Tables) | 6 Months Ended |
Jun. 30, 2018 | |
Debt Disclosure [Abstract] | |
Summary of Outstanding Borrowings | The Partnership’s outstanding borrowings consisted of the following: (In millions) June 30, 2018 December 31, 2017 MPLX LP: Bank revolving credit facility due 2022 $ — $ 505 5.500% senior notes due February 2023 710 710 3.375% senior notes due March 2023 500 — 4.500% senior notes due July 2023 989 989 4.875% senior notes due December 2024 1,149 1,149 4.000% senior notes due February 2025 500 500 4.875% senior notes due June 2025 1,189 1,189 4.125% senior notes due March 2027 1,250 1,250 4.000% senior notes due March 2028 1,250 — 4.500% senior notes due April 2038 1,750 — 5.200% senior notes due March 2047 1,000 1,000 4.700% senior notes due April 2048 1,500 — 4.900% senior notes due April 2058 500 — Consolidated subsidiaries: MarkWest - 4.500% - 5.500% senior notes, due 2023-2025 63 63 Capital lease obligations due 2020 7 7 Total 12,357 7,362 Unamortized debt issuance costs (78 ) (27 ) Unamortized discount (404 ) (389 ) Amounts due within one year (1 ) (1 ) Total long-term debt due after one year $ 11,874 $ 6,945 |
Revenue (Tables)
Revenue (Tables) | 6 Months Ended |
Jun. 30, 2018 | |
Revenue from Contract with Customer [Abstract] | |
Revenue, Initial Application Period Cumulative Effect Transition [Table Text Block] | The cumulative effect of the changes made to our consolidated January 1, 2018 balance sheet for the adoption of ASC 606 was as follows: (In millions) Balance at December 31, 2017 ASC 606 Adjustment Balance at January 1, 2018 Assets Inventories $ 65 $ 1 $ 66 Property, plant and equipment, net 12,187 (3 ) 12,184 Liabilities Long-term deferred revenue 42 (3 ) 39 Equity Common unitholders - public $ 8,379 $ 1 $ 8,380 Aside from the adjustments to the opening balances noted above, the impact of adoption on the Consolidated Balance Sheets for the period ended June 30, 2018 was approximately a $3 million adjustment to “Inventories.” The disclosure of the impact of adoption on the Consolidated Statements of Income for the three and six months ended June 30, 2018 was as follows: Three Months Ended June 30, 2018 (In millions) ASC 606 Balance ASC 605 Balance Effect of Change Higher/ (Lower) Revenues and other income: Service revenue $ 410 $ 326 $ 84 Service revenue - related parties 549 551 (2 ) Service revenue - product related 51 — 51 Rental income 84 69 15 Product sales (1) 208 234 (26 ) Product sales - related parties 13 11 2 Costs and expenses: Cost of revenues (2) 233 147 86 Purchased product costs 204 184 20 Rental cost of sales 33 18 15 Depreciation and amortization 188 189 (1 ) Net income $ 456 $ 452 $ 4 Six Months Ended June 30, 2018 (In millions) ASC 606 Balance ASC 605 Balance Effect of Change Higher/ (Lower) Revenues and other income: Service revenue $ 792 $ 631 $ 161 Service revenue - related parties 1,020 1,023 (3 ) Service revenue - product related 95 — 95 Rental income 163 132 31 Product sales (1) 414 461 (47 ) Product sales - related parties 17 14 3 Costs and expenses: Cost of revenues (2) 439 275 164 Purchased product costs 391 347 44 Rental cost of sales 62 31 31 Depreciation and amortization 364 365 (1 ) Net income $ 879 $ 877 $ 2 (1) G&P “Product sales” for the three and six months ended June 30, 2018 adds back approximately $2 million and $1 million , respectively, of revenue related to derivative gains and losses and mark-to-market adjustments. (2) Excludes “Purchased product costs,” “Rental cost of sales,” “Purchases,” “Depreciation and amortization,” “General and administrative expenses,” and “Other taxes.” |
Disaggregation of Revenue [Table Text Block] | The following table represents a disaggregation of revenue for each reportable segment for the three and six months ended June 30, 2018 : Three Months Ended June 30, 2018 (In millions) L&S G&P Total Revenues and other income: Service revenue $ 32 $ 378 $ 410 Service revenue - related parties 549 — 549 Service revenue - product related — 51 51 Product sales (1) 1 207 208 Product sales - related parties 2 11 13 Total revenues from contracts with customers $ 584 $ 647 $ 1,231 Non-ASC 606 revenue (2) 347 Total revenues and other income $ 1,578 Six Months Ended June 30, 2018 (In millions) L&S G&P Total Revenues and other income: Service revenue $ 60 $ 732 $ 792 Service revenue - related parties 1,020 — 1,020 Service revenue - product related — 95 95 Product sales (1) 2 412 414 Product sales - related parties 3 14 17 Total revenues from contracts with customers $ 1,085 $ 1,253 $ 2,338 Non-ASC 606 revenue (2) 660 Total revenues and other income $ 2,998 (1) G&P “Product sales” for the three and six months ended June 30, 2018 includes approximately $2 million and $1 million , respectively, of revenue related to derivative gains and losses and mark-to-market adjustments. (2) Non-ASC 606 Revenue includes rental income, income from equity method investments, derivative gains and losses, mark-to-market adjustments, and other income. |
Contract with Customer, Asset and Liability [Table Text Block] | The table below reflects the changes in our contract balances for the period ended June 30, 2018 : (In millions) Balance at January 1, 2018 (1) Additions/ (Deletions) Revenue Recognized (2) Balance at June 30, 2018 Contract assets $ 4 $ — $ — $ 4 Deferred revenue 5 3 (3 ) 5 Deferred revenue - related parties 42 16 (18 ) 40 Long-term deferred revenue 5 1 — 6 Long-term deferred revenue - related parties $ 43 $ 4 $ — $ 47 (1) Balance represents ASC 606 portion of each respective line item. (2) No revenue was recognized related to past performance obligations in the current period. |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] | Further, the Partnership does not disclose variable consideration due to volume variability in the table below. (In millions) Logistics & Storage Services Gathering & Processing Services (3) 2018 $ 510 $ 67 2019 1,012 129 2020 983 128 2021 982 128 2022 and thereafter 5,705 503 Total revenue on remaining performance obligations (1),(2) $ 9,192 $ 955 (1) All fixed consideration from contracts with customers is included in the amounts presented above. Variable consideration that is constrained or not required to be estimated as it reflects our efforts to perform is excluded. (2) Arrangements deemed implicit leases are included in “Rental income” and are excluded from this table. (3) Only minimum volume commitments that are deemed fixed are included in the table above. The Partnership has various minimum volume commitments in processing arrangements that vary based on the actual Btu content of the gas received. These amounts are deemed variable consideration and are excluded from the table above. |
Supplemental Cash Flow Inform43
Supplemental Cash Flow Information (Tables) | 6 Months Ended |
Jun. 30, 2018 | |
Supplemental Cash Flow Elements [Abstract] | |
Schedule of Cash and Cash Equivalents [Table Text Block] | (In millions) June 30, 2018 December 31, 2017 Cash and cash equivalents $ 3 $ 5 Restricted cash (1) 6 4 Cash, cash equivalents and restricted cash (2) $ 9 $ 9 (1) The restricted cash balance is included within “Other current assets” on the Consolidated Balance Sheets. (2) As a result of the adoption of ASU 2016-18, the Consolidated Statements of Cash Flows now explain the change during the period of both “Cash and cash equivalents” and restricted cash. |
Summary of Supplemental Cash Flow Information [Table Text Block] | Six Months Ended June 30, (In millions) 2018 2017 Net cash provided by operating activities included: Interest paid (net of amounts capitalized) $ 154 $ 99 Income taxes paid 1 — Non-cash investing and financing activities: Net transfers of property, plant and equipment from materials and supplies inventories 2 5 Contribution of fixed assets to joint venture (1) $ — $ 337 (1) Contribution of assets to Sherwood Midstream and Sherwood Midstream Holdings. See Note 5 . |
Summary of Reconciliation of Additions to Property, Plant and Equipment to Total Capital Expenditures [Table Text Block] | The following is the change of additions to property, plant and equipment related to capital accruals: Six Months Ended June 30, (In millions) 2018 2017 Increase in capital accruals $ 115 $ 33 |
Accumulated Other Comprehensi44
Accumulated Other Comprehensive Income (Tables) | 6 Months Ended |
Jun. 30, 2018 | |
Accumulated Other Comprehensive Income (Loss) [Line Items] | |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | The following table shows the changes in “Accumulated other comprehensive loss” by component during the period December 31, 2017 through June 30, 2018 . (In millions) Pension Benefits Other Post-Retirement Benefits Total Balance at December 31, 2017 (1) $ (13 ) $ (1 ) $ (14 ) Other comprehensive loss - remeasurements (2) (1 ) (1 ) (2 ) Balance at June 30, 2018 (1) $ (14 ) $ (2 ) $ (16 ) (1) These components of “Accumulated other comprehensive loss” are included in the computation of net periodic benefit cost by LOOP and Explorer and are therefore included on the Consolidated Statements of Income under the caption “Income from equity method investments.” (2) Components of other comprehensive loss - remeasurements relate to actuarial gains and losses as well as amortization of prior service costs. The Partnership records an adjustment to “Comprehensive income” in accordance with its ownership interest in LOOP and Explorer. |
Equity-Based Compensation Plan
Equity-Based Compensation Plan (Tables) | 6 Months Ended |
Jun. 30, 2018 | |
Phantom Units | |
Equity Transactions And Share Based Compensation [Line Items] | |
Summary of Share-based Compensation, Restricted Stock Units Award Activity | The following is a summary of phantom unit award activity of MPLX LP common units for the six months ended June 30, 2018 : Number Weighted Outstanding at December 31, 2017 1,351,523 $ 34.53 Granted 412,348 33.84 Settled (345,111 ) 34.63 Forfeited (92,824 ) 34.64 Outstanding at June 30, 2018 1,325,936 34.29 |
Performance Shares [Member] | |
Equity Transactions And Share Based Compensation [Line Items] | |
Summary of Share-based Compensation, Restricted Stock Units Award Activity | The following is a summary of the activity for performance unit awards to be settled in MPLX LP common units for the six months ended June 30, 2018 : Number of Outstanding at December 31, 2017 2,536,594 Granted — Settled (538,594 ) Forfeited (50,000 ) Outstanding at June 30, 2018 1,948,000 |
Description of Business and Bas
Description of Business and Basis of Presentation - Additional Information (Detail) | Feb. 01, 2018 | Sep. 01, 2017 | Mar. 01, 2017 | Jun. 30, 2018 |
Description Of Business And Basis Of Presentation [Line Items] | ||||
Number of reportable segments | 2 | |||
LOOP LOCAP SAX and Explorer Llc | ||||
Description Of Business And Basis Of Presentation [Line Items] | ||||
Effective date of acquisition | Sep. 1, 2017 | |||
HST & WHC & MPLXT | ||||
Description Of Business And Basis Of Presentation [Line Items] | ||||
Effective date of acquisition | Mar. 1, 2017 | |||
Refining Logistics & Fuels Distribution | ||||
Description Of Business And Basis Of Presentation [Line Items] | ||||
Effective date of acquisition | Feb. 1, 2018 |
Acquisitions Refining Logistics
Acquisitions Refining Logistics & Fuels Distribution (Details) bbl in Millions, $ in Millions | Feb. 01, 2018USD ($)Tanksharesbbl | Mar. 01, 2017USD ($) | Jun. 30, 2018USD ($) | Sep. 30, 2017USD ($) | Jun. 30, 2018USD ($) | Jun. 30, 2018USD ($)shares | Jun. 30, 2017USD ($) | Dec. 31, 2017USD ($) | |
Business Acquisition [Line Items] | |||||||||
Contribution from MPC | $ 1,046 | $ 12 | |||||||
Units acquired | shares | [1] | 113,888,889 | |||||||
Number of storage tanks | Tank | 619 | ||||||||
Property, plant and equipment, net | $ 13,642 | $ 13,642 | $ 13,642 | $ 12,187 | |||||
Goodwill | 2,460 | 2,460 | $ 2,460 | $ 2,245 | |||||
Number of rail and truck racks | 32 | ||||||||
Number of docks and gasoline blenders | 18 | ||||||||
Refining Logistics & Fuels Distribution | |||||||||
Business Acquisition [Line Items] | |||||||||
Payments to acquire businesses, gross | $ 4,100 | ||||||||
Revenues and other income | 364 | 629 | |||||||
Income from operations | 232 | $ 413 | |||||||
Equity interest issued or issuable, fair value assigned | 4,300 | ||||||||
Total consideration, fair value assigned | 8,400 | ||||||||
Property, plant and equipment, net | 830 | ||||||||
Refining Logistics [Member] | |||||||||
Business Acquisition [Line Items] | |||||||||
Goodwill | 85 | ||||||||
Fuels Distribution [Member] | |||||||||
Business Acquisition [Line Items] | |||||||||
Goodwill | $ 130 | ||||||||
Limited Partners Common Units | |||||||||
Business Acquisition [Line Items] | |||||||||
Units acquired | shares | [1] | 111,611,111 | |||||||
General Partner Units | |||||||||
Business Acquisition [Line Items] | |||||||||
Units acquired | shares | [1] | 2,277,778 | |||||||
General Partner Common Units | Refining Logistics & Fuels Distribution | |||||||||
Business Acquisition [Line Items] | |||||||||
Units acquired | shares | [1] | 85,610,278 | |||||||
MPLX LP | Limited Partners Common Units | Refining Logistics & Fuels Distribution | |||||||||
Business Acquisition [Line Items] | |||||||||
Units acquired | shares | [1] | 111,611,111 | |||||||
MPLX LP | General Partner Units | Refining Logistics & Fuels Distribution | |||||||||
Business Acquisition [Line Items] | |||||||||
Units acquired | shares | [1] | 2,277,778 | |||||||
MPLX Logistics LLC | Limited Partners Common Units | Refining Logistics & Fuels Distribution | |||||||||
Business Acquisition [Line Items] | |||||||||
Units acquired | shares | [1] | 18,176,666 | |||||||
MPLX Holdings Inc | Limited Partners Common Units | Refining Logistics & Fuels Distribution | |||||||||
Business Acquisition [Line Items] | |||||||||
Units acquired | shares | [1] | 7,824,167 | |||||||
MPC | |||||||||
Business Acquisition [Line Items] | |||||||||
Contribution from MPC | $ 6 | $ 10 | |||||||
MPC | Refining Logistics & Fuels Distribution | |||||||||
Business Acquisition [Line Items] | |||||||||
Contribution from MPC | $ 23.7 | ||||||||
Crude Oil [Member] | |||||||||
Business Acquisition [Line Items] | |||||||||
Storage Capacity | bbl | 56 | ||||||||
[1] | MPC agreed to waive approximately one-third of the first quarter 2018 distributions on the common units issued in connection with this transaction. As a result of this waiver, MPC did not receive $23.7 million of the distributions that would have otherwise accrued on such common units with respect to the first quarter 2018. See Note 4 for information regarding this acquisition. |
Acquisitions Joint-Interest Acq
Acquisitions Joint-Interest Acquisition (Details) $ in Millions | Sep. 01, 2017USD ($)inmishares | Mar. 01, 2017USD ($) | Jun. 30, 2018USD ($) | Sep. 30, 2017USD ($) | Jun. 30, 2017USD ($) | Jun. 30, 2018USD ($)shares | Jun. 30, 2017USD ($) | Dec. 31, 2017USD ($) | |||
Schedule of Equity Method Investments [Line Items] | |||||||||||
Units acquired | shares | [1] | 113,888,889 | |||||||||
General partner ownership interest | 2.00% | 2.00% | 2.00% | ||||||||
Distributions of cash received from joint-interest acquisition entities to MPC | $ 11 | $ 0 | |||||||||
Income from equity method investments | $ 50 | $ 1 | 111 | [2] | 6 | [2] | |||||
Equity method investments | 4,042 | 4,042 | $ 4,010 | ||||||||
Contribution from MPC | 1,046 | $ 12 | |||||||||
LOOP LOCAP SAX and Explorer Llc | |||||||||||
Schedule of Equity Method Investments [Line Items] | |||||||||||
Payments to acquire interest in joint venture | $ 420 | ||||||||||
Equity interest issued or issuable, value assigned | 630 | ||||||||||
Total consideration, value assigned | 1,050 | ||||||||||
Equity interest issued or issuable, fair value assigned | 653 | ||||||||||
Total consideration, fair value assigned | $ 1,070 | ||||||||||
Income from equity method investments | 25 | 62 | |||||||||
Equity method investments | $ 632 | $ 632 | |||||||||
Illinois Extension | |||||||||||
Schedule of Equity Method Investments [Line Items] | |||||||||||
Equity method investment, ownership percentage | 35.00% | 35.00% | 35.00% | ||||||||
Pipeline length | mi | 168 | ||||||||||
Pipeline diameter | in | 24 | ||||||||||
Number of pump stations | 2 | ||||||||||
Equity method investments | $ 285 | $ 285 | 284 | ||||||||
LOOP | |||||||||||
Schedule of Equity Method Investments [Line Items] | |||||||||||
Equity method investment, ownership percentage | 41.00% | 41.00% | 41.00% | ||||||||
Equity method investments | $ 226 | $ 226 | 225 | ||||||||
LOCAP | |||||||||||
Schedule of Equity Method Investments [Line Items] | |||||||||||
Equity method investment, ownership percentage | 59.00% | 59.00% | 59.00% | ||||||||
Equity method investments | $ 27 | $ 27 | 24 | ||||||||
Explorer | |||||||||||
Schedule of Equity Method Investments [Line Items] | |||||||||||
Equity method investment, ownership percentage | 25.00% | 25.00% | 25.00% | ||||||||
Pipeline length | mi | 1,830 | ||||||||||
Equity method investments | $ 95 | $ 95 | $ 89 | ||||||||
Limited Partners Common Units | |||||||||||
Schedule of Equity Method Investments [Line Items] | |||||||||||
Units acquired | shares | [1] | 111,611,111 | |||||||||
General Partner Units | |||||||||||
Schedule of Equity Method Investments [Line Items] | |||||||||||
Units acquired | shares | [1] | 2,277,778 | |||||||||
General Partner Units | LOOP LOCAP SAX and Explorer Llc | |||||||||||
Schedule of Equity Method Investments [Line Items] | |||||||||||
Units acquired | shares | [1] | 377,778 | |||||||||
General Partner Common Units | LOOP LOCAP SAX and Explorer Llc | |||||||||||
Schedule of Equity Method Investments [Line Items] | |||||||||||
Units acquired | shares | [1] | 13,719,017 | |||||||||
MPLX Logistics LLC | Limited Partners Common Units | LOOP LOCAP SAX and Explorer Llc | |||||||||||
Schedule of Equity Method Investments [Line Items] | |||||||||||
Units acquired | shares | [1] | 3,350,893 | |||||||||
MPLX Holdings Inc | Limited Partners Common Units | LOOP LOCAP SAX and Explorer Llc | |||||||||||
Schedule of Equity Method Investments [Line Items] | |||||||||||
Units acquired | shares | [1] | 1,441,224 | |||||||||
MPC | |||||||||||
Schedule of Equity Method Investments [Line Items] | |||||||||||
Contribution from MPC | $ 6 | $ 10 | |||||||||
General Partner | MPC | LOOP LOCAP SAX and Explorer Llc | |||||||||||
Schedule of Equity Method Investments [Line Items] | |||||||||||
Distributions of cash received from joint-interest acquisition entities to MPC | $ 32 | ||||||||||
[1] | MPC agreed to waive approximately one-third of the first quarter 2018 distributions on the common units issued in connection with this transaction. As a result of this waiver, MPC did not receive $23.7 million of the distributions that would have otherwise accrued on such common units with respect to the first quarter 2018. See Note 4 for information regarding this acquisition. | ||||||||||
[2] | “Income/(loss) from equity method investments” includes the impact of any basis differential amortization or accretion. |
Acquisition of HST, WHC & MPLXT
Acquisition of HST, WHC & MPLXT (Details) bbl in Millions, $ in Millions | Sep. 01, 2017 | Mar. 01, 2017USD ($)misharesbbl | Sep. 30, 2017USD ($) | Jun. 30, 2018USD ($)shares | Jun. 30, 2017USD ($) | |
Business Acquisition [Line Items] | ||||||
Units acquired | [1] | 113,888,889 | ||||
General partner ownership interest | 2.00% | 2.00% | 2.00% | |||
Contribution from MPC | $ | $ 1,046 | $ 12 | ||||
Number of natural gas liquids storage caverns | 8 | |||||
Number of light product terminals | 62 | |||||
General Partner Units | ||||||
Business Acquisition [Line Items] | ||||||
Units acquired | [1] | 2,277,778 | ||||
Limited Partners Common Units | ||||||
Business Acquisition [Line Items] | ||||||
Units acquired | [1] | 111,611,111 | ||||
HST & WHC & MPLXT | ||||||
Business Acquisition [Line Items] | ||||||
Equity interest issued or issuable, value assigned | $ | $ 504 | |||||
Equity interest issued or issuable, fair value assigned | $ | 503 | |||||
HST & WHC & MPLXT | Cash and Cash Equivalents [Member] | ||||||
Business Acquisition [Line Items] | ||||||
Payments to acquire businesses, gross | $ | $ 1,500 | |||||
HST & WHC & MPLXT | General Partner Units | ||||||
Business Acquisition [Line Items] | ||||||
Units acquired | 264,497 | |||||
HST & WHC & MPLXT | General Partner Common Units | ||||||
Business Acquisition [Line Items] | ||||||
Units acquired | 9,197,900 | |||||
MPLX Logistics LLC | HST & WHC & MPLXT | Limited Partners Common Units | ||||||
Business Acquisition [Line Items] | ||||||
Units acquired | 2,630,427 | |||||
MPLX Holdings Inc | HST & WHC & MPLXT | Limited Partners Common Units | ||||||
Business Acquisition [Line Items] | ||||||
Units acquired | 1,132,049 | |||||
Natural gas liquids storage caverns [Member] | ||||||
Business Acquisition [Line Items] | ||||||
Storage Capacity | bbl | 1.8 | |||||
Light-product terminal [Member] | ||||||
Business Acquisition [Line Items] | ||||||
Storage Capacity | bbl | 23.6 | |||||
Refined Products [Member] | ||||||
Business Acquisition [Line Items] | ||||||
Miles of pipeline | mi | 430 | |||||
Crude Oil [Member] | ||||||
Business Acquisition [Line Items] | ||||||
Miles of pipeline | mi | 174 | |||||
Wholly Owned Properties [Member] | ||||||
Business Acquisition [Line Items] | ||||||
Number of light product terminals | 59 | |||||
Property Subject to Operating Lease [Member] | ||||||
Business Acquisition [Line Items] | ||||||
Number of light product terminals | 1 | |||||
Partially Owned Properties [Member] | ||||||
Business Acquisition [Line Items] | ||||||
Number of light product terminals | 2 | |||||
MPC | ||||||
Business Acquisition [Line Items] | ||||||
Contribution from MPC | $ | $ 6 | $ 10 | ||||
[1] | MPC agreed to waive approximately one-third of the first quarter 2018 distributions on the common units issued in connection with this transaction. As a result of this waiver, MPC did not receive $23.7 million of the distributions that would have otherwise accrued on such common units with respect to the first quarter 2018. See Note 4 for information regarding this acquisition. |
Acquisition of Ozark Pipeline (
Acquisition of Ozark Pipeline (Details) bbl / d in Thousands, $ in Millions | Mar. 01, 2017USD ($)bbl / dinmi | Jun. 30, 2018USD ($) | Jun. 30, 2017USD ($) |
Business Acquisition [Line Items] | |||
Additions to property, plant and equipment | $ (862) | $ (652) | |
Ozark Pipeline [Member] | |||
Business Acquisition [Line Items] | |||
Additions to property, plant and equipment | $ (219) | ||
Pipeline length | mi | 433 | ||
Pipeline diameter | in | 22 | ||
Pipeline barrels capable of transportation | bbl / d | 230 |
Acquisitions MarEn Bakken (Deta
Acquisitions MarEn Bakken (Details) $ in Millions | Feb. 15, 2017USD ($)Quarterly_reporting_period | Jun. 30, 2018USD ($) | Jun. 30, 2017USD ($) | Jun. 30, 2018USD ($) | Jun. 30, 2017USD ($) | Dec. 31, 2017USD ($) | ||
Schedule of Equity Method Investments [Line Items] | ||||||||
Investments in unconsolidated affiliates | $ 112 | $ 640 | ||||||
Income from equity method investments | $ 50 | $ 1 | 111 | [1] | $ 6 | [1] | ||
Equity method investments | 4,042 | 4,042 | $ 4,010 | |||||
MarEn Bakken [Member] | ||||||||
Schedule of Equity Method Investments [Line Items] | ||||||||
Investments in unconsolidated affiliates | $ 500 | |||||||
Percentage of Ownership Interest in Joint Venture Acquired | 25.00% | |||||||
Income from equity method investments | $ 11 | $ 18 | ||||||
Bakken Pipeline System [Member] | ||||||||
Schedule of Equity Method Investments [Line Items] | ||||||||
Percentage of Ownership Interest in Joint Venture Acquired | 37.00% | |||||||
Equity method investment, ownership percentage | 9.00% | |||||||
MarEn Bakken Company LLC [Member] | ||||||||
Schedule of Equity Method Investments [Line Items] | ||||||||
Equity method investment, ownership percentage | 25.00% | 25.00% | ||||||
Equity method investments | $ 508 | $ 508 | $ 520 | |||||
MarEn Bakken Company LLC [Member] | ||||||||
Schedule of Equity Method Investments [Line Items] | ||||||||
Investments in unconsolidated affiliates | $ 2,000 | |||||||
MPC | ||||||||
Schedule of Equity Method Investments [Line Items] | ||||||||
Incentive Distribution Rights Forfeited per Quarter | $ 1.6 | |||||||
Number of Quarters IDRs Forfeited | Quarterly_reporting_period | 12 | |||||||
Prorated Incentive Distribution Rights Forfeited | $ 0.8 | |||||||
[1] | “Income/(loss) from equity method investments” includes the impact of any basis differential amortization or accretion. |
Equity Method Investments - Sum
Equity Method Investments - Summary of Equity Method Investment Financial Information (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | ||||||||
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017 | Sep. 01, 2017 | Jan. 01, 2017 | ||||
Schedule of Equity Method Investments [Line Items] | ||||||||||
Revenues and other income | $ 798 | $ 200 | ||||||||
Costs and expenses | 432 | 138 | ||||||||
Income (loss) from operations | 366 | 62 | ||||||||
Net income (loss) | 337 | 61 | ||||||||
Income from equity method investments | $ 50 | $ 1 | 111 | [1] | 6 | [1] | ||||
Current assets | 489 | 489 | $ 510 | |||||||
Noncurrent assets | 7,732 | 7,732 | 7,631 | |||||||
Current liabilities | 303 | 303 | 303 | |||||||
Noncurrent liabilities | 886 | 886 | 918 | |||||||
Equity method investments | $ 4,042 | $ 4,042 | 4,010 | |||||||
Centrahoma Processing LLC [Member] | ||||||||||
Schedule of Equity Method Investments [Line Items] | ||||||||||
Equity method investment, ownership percentage | 40.00% | 40.00% | ||||||||
Equity method investments | $ 123 | $ 123 | 121 | |||||||
MarkWest Utica EMG | ||||||||||
Schedule of Equity Method Investments [Line Items] | ||||||||||
Equity method investment, ownership percentage | 56.00% | 56.00% | ||||||||
Revenues and other income | $ 117 | 88 | ||||||||
Costs and expenses | 89 | 48 | ||||||||
Income (loss) from operations | 28 | 40 | ||||||||
Net income (loss) | 27 | 40 | ||||||||
Income from equity method investments | [1] | (4) | 2 | |||||||
Current assets | $ 78 | 78 | 65 | |||||||
Noncurrent assets | [2] | 2,007 | 2,007 | 2,077 | ||||||
Current liabilities | 30 | 30 | 39 | |||||||
Noncurrent liabilities | 5 | 5 | 3 | |||||||
Equity method investments | 2,092 | 2,092 | 2,139 | |||||||
Other VIEs [Member] | ||||||||||
Schedule of Equity Method Investments [Line Items] | ||||||||||
Revenues and other income | 92 | 21 | ||||||||
Costs and expenses | 38 | 17 | ||||||||
Income (loss) from operations | 54 | 4 | ||||||||
Net income (loss) | 54 | 4 | ||||||||
Income from equity method investments | [1] | 30 | (1) | |||||||
Current assets | 58 | 58 | 46 | |||||||
Noncurrent assets | 1,109 | 1,109 | 930 | |||||||
Current liabilities | 86 | 86 | 44 | |||||||
Noncurrent liabilities | 10 | 10 | 11 | |||||||
Equity method investments | 12 | 12 | 8 | |||||||
Non-VIEs [Member] | ||||||||||
Schedule of Equity Method Investments [Line Items] | ||||||||||
Revenues and other income | 589 | 91 | ||||||||
Costs and expenses | 305 | 73 | ||||||||
Income (loss) from operations | 284 | 18 | ||||||||
Net income (loss) | 256 | 17 | ||||||||
Income from equity method investments | [1] | 85 | $ 5 | |||||||
Current assets | 353 | 353 | 399 | |||||||
Noncurrent assets | 4,616 | 4,616 | 4,624 | |||||||
Current liabilities | 187 | 187 | 220 | |||||||
Noncurrent liabilities | $ 871 | $ 871 | 904 | |||||||
Ohio Condensate Company, LLC [Member] | ||||||||||
Schedule of Equity Method Investments [Line Items] | ||||||||||
Equity method investment, ownership percentage | 60.00% | 60.00% | ||||||||
Equity method investments | $ 11 | $ 11 | 11 | |||||||
Ohio Gathering | ||||||||||
Schedule of Equity Method Investments [Line Items] | ||||||||||
Equity method investment, ownership percentage | 34.00% | 34.00% | ||||||||
Investment in subsidiary | $ 769 | $ 769 | 790 | |||||||
Explorer | ||||||||||
Schedule of Equity Method Investments [Line Items] | ||||||||||
Equity method investment, ownership percentage | 25.00% | 25.00% | 25.00% | |||||||
Equity method investments | $ 95 | $ 95 | 89 | |||||||
Illinois Extension | ||||||||||
Schedule of Equity Method Investments [Line Items] | ||||||||||
Equity method investment, ownership percentage | 35.00% | 35.00% | 35.00% | |||||||
Equity method investments | $ 285 | $ 285 | 284 | |||||||
LOCAP | ||||||||||
Schedule of Equity Method Investments [Line Items] | ||||||||||
Equity method investment, ownership percentage | 59.00% | 59.00% | 59.00% | |||||||
Equity method investments | $ 27 | $ 27 | 24 | |||||||
LOOP | ||||||||||
Schedule of Equity Method Investments [Line Items] | ||||||||||
Equity method investment, ownership percentage | 41.00% | 41.00% | 41.00% | |||||||
Equity method investments | $ 226 | $ 226 | 225 | |||||||
MarEn Bakken Company LLC [Member] | ||||||||||
Schedule of Equity Method Investments [Line Items] | ||||||||||
Equity method investment, ownership percentage | 25.00% | 25.00% | ||||||||
Equity method investments | $ 508 | $ 508 | 520 | |||||||
Jefferson Dry Gas | ||||||||||
Schedule of Equity Method Investments [Line Items] | ||||||||||
Equity method investment, ownership percentage | 67.00% | 67.00% | ||||||||
Equity method investments | $ 194 | $ 194 | 164 | |||||||
Panola Pipeline Company LLC [Member] | ||||||||||
Schedule of Equity Method Investments [Line Items] | ||||||||||
Equity method investment, ownership percentage | 15.00% | 15.00% | ||||||||
Equity method investments | $ 23 | $ 23 | 24 | |||||||
Sherwood Midstream | ||||||||||
Schedule of Equity Method Investments [Line Items] | ||||||||||
Equity method investment, ownership percentage | 50.00% | 50.00% | ||||||||
Equity method investments | $ 291 | $ 291 | 236 | |||||||
Sherwood Midstream Holdings | ||||||||||
Schedule of Equity Method Investments [Line Items] | ||||||||||
Equity method investment, ownership percentage | 81.00% | 81.00% | ||||||||
Equity method investments | $ 155 | $ 155 | 165 | |||||||
Direct Ownership Interest [Member] | Sherwood Midstream Holdings | ||||||||||
Schedule of Equity Method Investments [Line Items] | ||||||||||
Equity method investment, ownership percentage | 63.00% | 63.00% | 79.00% | |||||||
G&P | ||||||||||
Schedule of Equity Method Investments [Line Items] | ||||||||||
Difference between carrying amount and underlying equity | $ 1,000 | $ 1,000 | 1,000 | |||||||
Difference between carrying amount and underlying equity portion related to goodwill | 459 | 459 | 459 | |||||||
L&S | ||||||||||
Schedule of Equity Method Investments [Line Items] | ||||||||||
Difference between carrying amount and underlying equity | 118 | 118 | 118 | |||||||
Difference between carrying amount and underlying equity portion related to goodwill | $ 39 | $ 39 | $ 39 | |||||||
[1] | “Income/(loss) from equity method investments” includes the impact of any basis differential amortization or accretion. | |||||||||
[2] | MarkWest Utica EMG, L.L.C.’s (“MarkWest Utica EMG”) noncurrent assets include its investment in its subsidiary, Ohio Gathering Company, L.L.C. (“Ohio Gathering”), which does not appear elsewhere in this table. The investment was $769 million and $790 million as of June 30, 2018 and December 31, 2017, respectively. |
Equity Method Investments Utica
Equity Method Investments Utica EMG (Details) - USD ($) $ in Millions | Jun. 30, 2018 | Dec. 31, 2017 |
Schedule of Equity Method Investments [Line Items] | ||
Equity method investments | $ 4,042 | $ 4,010 |
MarkWest Utica EMG | ||
Schedule of Equity Method Investments [Line Items] | ||
Equity method investments | $ 2,092 | $ 2,139 |
Investments & NCI Ohio Gatherin
Investments & NCI Ohio Gathering (Details) | Jun. 30, 2018 |
Ohio Gathering | |
Schedule of Equity Method Investments [Line Items] | |
Equity method investment, ownership percentage | 34.00% |
Investments & NCI Sherwood Mids
Investments & NCI Sherwood Midstream (Details) bbl / d in Thousands, $ in Millions | Jan. 01, 2017USD ($)bbl / d | Jun. 30, 2018USD ($) | Jun. 30, 2017USD ($) | [1] | Dec. 31, 2017USD ($) |
Schedule of Equity Method Investments [Line Items] | |||||
Contribution of fixed assets to joint venture | $ 0 | $ 337 | |||
Equity method investments | $ 4,042 | $ 4,010 | |||
Sherwood Midstream | |||||
Schedule of Equity Method Investments [Line Items] | |||||
Equity method investment, ownership percentage | 50.00% | ||||
Contribution of fixed assets to joint venture | $ 134 | ||||
Payments to acquire interest in joint venture | $ 20 | ||||
Equity method investments | $ 291 | $ 236 | |||
MarkWest Ohio Fractionation Company, L.L.C. [Member] | |||||
Schedule of Equity Method Investments [Line Items] | |||||
Capacity | bbl / d | 20 | ||||
Sherwood Midstream | MarkWest Ohio Fractionation Company, L.L.C. [Member] | |||||
Schedule of Equity Method Investments [Line Items] | |||||
Payments to acquire interest in joint venture | $ 126 | ||||
Antero Midstream Partners L.P. [Member] | Sherwood Midstream | |||||
Schedule of Equity Method Investments [Line Items] | |||||
Payments to acquire interest in joint venture | $ 154 | ||||
[1] | Contribution of assets to Sherwood Midstream and Sherwood Midstream Holdings. See Note 5. |
Investments & NCI Sherwood Mi56
Investments & NCI Sherwood Midstream Holdings (Details) - USD ($) $ in Millions | Jan. 01, 2017 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | [1] | Dec. 31, 2017 |
Schedule of Equity Method Investments [Line Items] | ||||||
Contribution of fixed assets to joint venture | $ 0 | $ 337 | ||||
Equity method investments | $ 4,042 | $ 4,010 | ||||
Sherwood Midstream Holdings | ||||||
Schedule of Equity Method Investments [Line Items] | ||||||
Fair Value Of Assets Contributed | $ 209 | $ 10 | ||||
Equity method investment, ownership percentage | 81.00% | |||||
Ownership Interest In Assets Sold By Company In Affiliate | 6.00% | |||||
Proceeds From Sale Of Ownership Interest In Assets Sold By Company In Affiliate | $ 15 | |||||
Equity method investments | $ 155 | $ 165 | ||||
Direct Ownership Interest [Member] | Sherwood Midstream Holdings | ||||||
Schedule of Equity Method Investments [Line Items] | ||||||
Equity method investment, ownership percentage | 79.00% | 63.00% | ||||
Indirect Ownership Interest [Member] | Sherwood Midstream Holdings | ||||||
Schedule of Equity Method Investments [Line Items] | ||||||
Equity method investment, ownership percentage | 18.50% | |||||
Sherwood Midstream | Sherwood Midstream Holdings | ||||||
Schedule of Equity Method Investments [Line Items] | ||||||
Equity method investment, ownership percentage | 21.00% | |||||
Payments to acquire interest in joint venture | $ 44 | $ 4 | ||||
[1] | Contribution of assets to Sherwood Midstream and Sherwood Midstream Holdings. See Note 5. |
Related Party Agreements and 57
Related Party Agreements and Transactions - Additional Information (Detail) - USD ($) $ in Millions | 6 Months Ended | 9 Months Ended | 12 Months Ended | |
Jun. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2017 | Apr. 26, 2018 | |
MPC | ||||
Related Party Transaction [Line Items] | ||||
Prepaid Insurance | $ 5 | $ 8 | ||
Related Party Revolving Credit Agreement | MPC Investment | ||||
Related Party Transaction [Line Items] | ||||
Current borrowing capacity | $ 1,000 | $ 500 | ||
Expiration date | Dec. 4, 2020 | |||
Description of variable rate basis | LIBOR plus 1.50 percent | |||
Proceeds from short-term debt | $ 1,200 | 2,400 | ||
Repayments of short-term debt | 1,400 | 2,000 | ||
Intercompany loan outstanding | $ 112 | $ 386 | ||
Interest rate during period | 3.21% | 2.777% | ||
MarkWest Utica EMG | ||||
Related Party Transaction [Line Items] | ||||
Equity method investment, ownership percentage | 56.00% | |||
Ohio Gathering | ||||
Related Party Transaction [Line Items] | ||||
Equity method investment, ownership percentage | 34.00% | |||
Sherwood Midstream | ||||
Related Party Transaction [Line Items] | ||||
Equity method investment, ownership percentage | 50.00% | |||
Sherwood Midstream Holdings | ||||
Related Party Transaction [Line Items] | ||||
Equity method investment, ownership percentage | 81.00% | |||
Jefferson Dry Gas | ||||
Related Party Transaction [Line Items] | ||||
Equity method investment, ownership percentage | 67.00% | |||
Gas Distribution [Member] | Ten Year Storage Services Agreement [Member] | Commercial Agreements [Member] | MPC | ||||
Related Party Transaction [Line Items] | ||||
Term Of Agreements | 10 years | |||
Storage Services Butane and Propane Caverns [Member] | Ten Year Storage Services Agreement [Member] | Commercial Agreements [Member] | MPC | ||||
Related Party Transaction [Line Items] | ||||
Term Of Agreements | 10 years | |||
Storage Services Tank Farm [Member] | Three Year Storage Services Agreement [Member] | Commercial Agreements [Member] | MPC | ||||
Related Party Transaction [Line Items] | ||||
Term Of Agreements | 5 years | 5 years | ||
Management Services Agreements [Member] | Ten Year Storage Services Agreement [Member] | Commercial Agreements [Member] | MPC | ||||
Related Party Transaction [Line Items] | ||||
Term Of Agreements | 50 years | |||
Management Services Agreements [Member] | Lease Agreements [Member] | Commercial Agreements [Member] | MPC | ||||
Related Party Transaction [Line Items] | ||||
Term Of Agreements | 50 years |
Related Party Agreements and 58
Related Party Agreements and Transactions - Sales to Related Parties (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | |||
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | ||
Related Party Transaction [Line Items] | |||||
Revenue from Related Parties | $ 3 | $ 4 | |||
Rental income - related parties | $ 190 | $ 70 | 335 | 137 | |
MPC | |||||
Related Party Transaction [Line Items] | |||||
Service revenue - related parties | 549 | 270 | 1,020 | 525 | |
Rental income - related parties | 190 | 70 | 335 | 137 | |
Product sales - related parties | [1] | 13 | 2 | 17 | 4 |
Product sales to MPC that net to zero | $ 112 | $ 53 | $ 191 | $ 110 | |
[1] | There were additional product sales to MPC that net to zero within the consolidated financial statements as the transactions are recorded net due to the terms of the agreements under which such product was sold. For the three and six months ended June 30, 2018, these sales totaled $112 million and $191 million, respectively. For the three and six months ended June 30, 2017, these sales totaled $53 million and $110 million, respectively. |
Related Party Agreements and 59
Related Party Agreements and Transactions - Other Income - Related Parties (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | ||
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | |
Related Party Transaction [Line Items] | ||||
Other income - related parties | $ 24 | $ 25 | $ 47 | $ 47 |
MPC | ||||
Related Party Transaction [Line Items] | ||||
Other income - related parties | 10 | 10 | 20 | 21 |
MarkWest Utica EMG | ||||
Related Party Transaction [Line Items] | ||||
Other income - related parties | 4 | 4 | 8 | 8 |
Ohio Gathering | ||||
Related Party Transaction [Line Items] | ||||
Other income - related parties | 4 | 4 | 8 | 8 |
Jefferson Dry Gas | ||||
Related Party Transaction [Line Items] | ||||
Other income - related parties | 2 | 2 | 3 | 3 |
Sherwood Midstream | ||||
Related Party Transaction [Line Items] | ||||
Other income - related parties | 2 | 3 | 5 | 4 |
Other | ||||
Related Party Transaction [Line Items] | ||||
Other income - related parties | $ 2 | $ 2 | $ 3 | $ 3 |
Related Party Agreements and 60
Related Party Agreements and Transaction - Summary of Charges for Omnibus Agreement (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | |||
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Apr. 26, 2018 | |
MPC | |||||
Related Party Transaction [Line Items] | |||||
Charges for services under an omnibus agreement | $ 60 | $ 29 | $ 112 | $ 52 | |
MPC | Purchases - related parties | |||||
Related Party Transaction [Line Items] | |||||
Charges for services under an omnibus agreement | 43 | 18 | 79 | 33 | |
MPC | General and administrative expenses | |||||
Related Party Transaction [Line Items] | |||||
Charges for services under an omnibus agreement | 17 | $ 11 | 33 | $ 19 | |
Related Party Revolving Credit Agreement | MPC Investment | |||||
Related Party Transaction [Line Items] | |||||
Current borrowing capacity | $ 1,000 | $ 1,000 | $ 500 |
Related Party Agreements and 61
Related Party Agreements and Transactions - Summary of Related Party Costs Added to Property, Plant and Equipment (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | ||
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | |
MPC | Construction-in-progress | ||||
Property, Plant and Equipment [Line Items] | ||||
Costs added to property, plant and equipment | $ 41 | $ 12 | $ 63 | $ 22 |
Related Party Agreements and 62
Related Party Agreements and Transactions - Employee Services Agreements (Detail) - MPC - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | ||
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | |
Related Party Transaction [Line Items] | ||||
Expenses incurred under employee services agreements | $ 160 | $ 116 | $ 298 | $ 233 |
Rental cost of sales - related parties | ||||
Related Party Transaction [Line Items] | ||||
Expenses incurred under employee services agreements | 0 | 1 | 1 | 1 |
Purchases - related parties | ||||
Related Party Transaction [Line Items] | ||||
Expenses incurred under employee services agreements | 133 | 91 | 247 | 183 |
General and administrative expenses | ||||
Related Party Transaction [Line Items] | ||||
Expenses incurred under employee services agreements | $ 27 | $ 24 | $ 50 | $ 49 |
Related Party Agreements and 63
Related Party Agreements and Transactions - Purchases from Related Party (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | ||
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | |
Related Party Transaction [Line Items] | ||||
Related party purchases | $ 1 | $ 5 | ||
MPC | ||||
Related Party Transaction [Line Items] | ||||
Related party purchases | $ 47 | $ 0 | $ 74 | $ 0 |
Related Party Agreements and 64
Related Party Agreements and Transactions - Receivables from Related Parties (Detail) - USD ($) $ in Millions | Jun. 30, 2018 | Dec. 31, 2017 |
Related Party Transaction [Line Items] | ||
Receivables - related parties | $ 294 | $ 160 |
MPC | ||
Related Party Transaction [Line Items] | ||
Receivables - related parties | 286 | 153 |
MarkWest Utica EMG | ||
Related Party Transaction [Line Items] | ||
Receivables - related parties | 1 | 1 |
Ohio Gathering | ||
Related Party Transaction [Line Items] | ||
Receivables - related parties | 3 | 2 |
Jefferson Dry Gas | ||
Related Party Transaction [Line Items] | ||
Receivables - related parties | 1 | 2 |
Sherwood Midstream Holdings | ||
Related Party Transaction [Line Items] | ||
Receivables - related parties | 0 | 0 |
Other | ||
Related Party Transaction [Line Items] | ||
Receivables - related parties | $ 3 | $ 2 |
Related Party Agreements and 65
Related Party Agreements and Transactions Related Party Agreements and Transactions - Long-term Receivables from Related Parties (Details) - USD ($) $ in Millions | Jun. 30, 2018 | Dec. 31, 2017 |
Related Party Transaction [Line Items] | ||
Long-term receivables - related parties | $ 22 | $ 20 |
MPC | ||
Related Party Transaction [Line Items] | ||
Long-term receivables - related parties | $ 22 | $ 20 |
Related Party Agreements and 66
Related Party Agreements and Transactions - Payables to Related Parties (Detail) - USD ($) $ in Millions | Jun. 30, 2018 | Dec. 31, 2017 |
Related Party Transaction [Line Items] | ||
Payables - related parties | $ 273 | $ 516 |
MPC | ||
Related Party Transaction [Line Items] | ||
Payables - related parties | 239 | 470 |
MarkWest Utica EMG | ||
Related Party Transaction [Line Items] | ||
Payables - related parties | 26 | 29 |
Ohio Gathering | ||
Related Party Transaction [Line Items] | ||
Payables - related parties | 0 | 8 |
Sherwood Midstream | ||
Related Party Transaction [Line Items] | ||
Payables - related parties | 8 | 8 |
Other | ||
Related Party Transaction [Line Items] | ||
Payables - related parties | 0 | 1 |
Related Party Revolving Credit Agreement | MPC Investment | ||
Related Party Transaction [Line Items] | ||
Intercompany loan outstanding | $ 112 | $ 386 |
Related Party Agreements and 67
Related Party Agreements and Transactions - Summary of Deferred Revenue - Related Parties (Detail) - MPC - USD ($) $ in Millions | Jun. 30, 2018 | Dec. 31, 2017 |
Related Party Transaction [Line Items] | ||
Deferred revenue related parties | $ 88 | $ 86 |
Minimum volume deficiencies [Member] | ||
Related Party Transaction [Line Items] | ||
Deferred revenue related parties | 40 | 53 |
Project reimbursements [Member] | ||
Related Party Transaction [Line Items] | ||
Deferred revenue related parties | $ 48 | $ 33 |
Net Income Per Limited Partne68
Net Income Per Limited Partner Unit - Schedule of Distributions by Partner by Class (Detail) - USD ($) shares in Millions, $ in Millions | 3 Months Ended | 6 Months Ended | ||||||
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | |||||
Net Income Per Share [Line Items] | ||||||||
Potentially dilutive units | 1 | 1 | 1 | 1 | ||||
Net income attributable to MPLX LP | $ 453 | [1] | $ 190 | [1] | $ 874 | $ 340 | [1] | |
Less: Distribution declared | 517 | 311 | 1,000 | 590 | ||||
Undistributed net loss attributable to MPLX LP | (64) | (121) | (126) | (250) | ||||
Preferred Units | ||||||||
Net Income Per Share [Line Items] | ||||||||
Net income attributable to MPLX LP | [1] | 20 | 17 | 874 | 33 | |||
Less: Distribution declared | [2] | 20 | 17 | 36 | 33 | |||
General Partner | ||||||||
Net Income Per Share [Line Items] | ||||||||
Less: Distribution declared | [2] | 0 | 141 | |||||
General Partner | MPC | ||||||||
Net Income Per Share [Line Items] | ||||||||
Net income attributable to MPLX LP | [1] | 74 | 136 | |||||
Less: Distribution declared | 0 | [2] | 76 | [2] | 141 | |||
Limited Partners Common Units | ||||||||
Net Income Per Share [Line Items] | ||||||||
Net income attributable to MPLX LP | [1] | 433 | 99 | 838 | 171 | |||
Less: Distribution declared | [2] | $ 497 | $ 218 | $ 964 | $ 416 | |||
[1] | Allocation of net income attributable to MPLX LP assumes all earnings for the period had been distributed based on the current period distribution priorities. | |||||||
[2] | See Note 8 for distribution information. |
Net Income Per Limited Partne69
Net Income Per Limited Partner Unit - Basic and Diluted Earnings Per Unit (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 3 Months Ended | 6 Months Ended | ||||||
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | |||||
Net income (loss) attributable to MPLX LP: | ||||||||
Distributions declared (including IDRs) | $ 517 | $ 311 | $ 1,000 | $ 590 | ||||
Undistributed net income (loss) attributable to MPLX LP | (64) | (121) | (250) | |||||
Net income attributable to MPLX LP | $ 453 | [1] | $ 190 | [1] | 874 | $ 340 | [1] | |
Weighted average units outstanding: | ||||||||
Common - basic (in shares) | 825 | 416 | 409 | |||||
Common - diluted (in shares) | 825 | 421 | 413 | |||||
General Partner | ||||||||
Net income (loss) attributable to MPLX LP: | ||||||||
Distributions declared (including IDRs) | [2] | 0 | $ 141 | |||||
Limited Partners Common Units | ||||||||
Net income (loss) attributable to MPLX LP: | ||||||||
Distributions declared (including IDRs) | [2] | $ 497 | $ 218 | 964 | 416 | |||
Undistributed net income (loss) attributable to MPLX LP | (64) | (119) | (126) | (245) | ||||
Net income attributable to MPLX LP | [1] | $ 433 | $ 99 | $ 838 | $ 171 | |||
Weighted average units outstanding: | ||||||||
Common - basic (in shares) | 794 | 377 | 728 | 370 | ||||
Common - diluted (in shares) | 794 | 382 | 728 | 374 | ||||
Net income attributable to MPLX LP per limited partner unit: | ||||||||
Basic (in USD per unit) | $ 0.55 | $ 0.26 | $ 1.15 | $ 0.46 | ||||
Diluted (in USD per unit) | $ 0.55 | $ 0.26 | $ 1.15 | $ 0.46 | ||||
Preferred Units | ||||||||
Net income (loss) attributable to MPLX LP: | ||||||||
Distributions declared (including IDRs) | [2] | $ 20 | $ 17 | $ 36 | $ 33 | |||
Undistributed net income (loss) attributable to MPLX LP | 0 | 0 | (126) | 0 | ||||
Net income attributable to MPLX LP | [1] | $ 20 | $ 17 | $ 874 | $ 33 | |||
Weighted average units outstanding: | ||||||||
Common - basic (in shares) | 31 | 31 | 759 | 31 | ||||
Common - diluted (in shares) | 31 | 31 | 759 | 31 | ||||
MPC | General Partner | ||||||||
Net income (loss) attributable to MPLX LP: | ||||||||
Distributions declared (including IDRs) | $ 0 | [2] | $ 76 | [2] | $ 141 | |||
Undistributed net income (loss) attributable to MPLX LP | (2) | (5) | ||||||
Net income attributable to MPLX LP | [1] | $ 74 | $ 136 | |||||
Weighted average units outstanding: | ||||||||
Common - basic (in shares) | 8 | 8 | ||||||
Common - diluted (in shares) | 8 | 8 | ||||||
MPC | Limited Partners Subordinated Units [Member] | ||||||||
Net income (loss) attributable to MPLX LP: | ||||||||
Distributions declared (including IDRs) | $ 36 | |||||||
Net income attributable to MPLX LP | [1] | $ 36 | ||||||
Weighted average units outstanding: | ||||||||
Common - basic (in shares) | 31 | |||||||
Common - diluted (in shares) | 31 | |||||||
Net income attributable to MPLX LP per limited partner unit: | ||||||||
Undistributed Earnings, Basic | $ 0 | |||||||
[1] | Allocation of net income attributable to MPLX LP assumes all earnings for the period had been distributed based on the current period distribution priorities. | |||||||
[2] | See Note 8 for distribution information. |
Equity - Changes in Partners Ca
Equity - Changes in Partners Capital, Unit Rollforward (Details) - USD ($) $ in Millions | Feb. 01, 2018 | [2] | Sep. 01, 2017 | Mar. 01, 2017 | Jun. 30, 2018 | Sep. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | |
Stockholders Equity [Line Items] | |||||||||
Balance at December 31, 2017 | 415,438,793 | ||||||||
Unit-based compensation awards | [1] | 239,235 | |||||||
Contribution of refining logistics and fuels distribution assets | [2] | 113,888,889 | |||||||
Conversion of GP economic interests | 264,413,309 | ||||||||
Balance at June 30, 2018 | 793,980,226 | 793,980,226 | |||||||
Sale of units for GP Interest | $ 443 | ||||||||
General partner ownership interest | 2.00% | 2.00% | 2.00% | ||||||
Contribution from MPC | $ 1,046 | $ 12 | |||||||
Limited Partners Common Units | |||||||||
Stockholders Equity [Line Items] | |||||||||
Balance at December 31, 2017 | 407,130,020 | ||||||||
Unit-based compensation awards | [1] | 239,095 | |||||||
Contribution of refining logistics and fuels distribution assets | [2] | 111,611,111 | |||||||
Conversion of GP economic interests | 275,000,000 | 275,000,000 | |||||||
Balance at June 30, 2018 | 793,980,226 | 793,980,226 | |||||||
General Partner Units | |||||||||
Stockholders Equity [Line Items] | |||||||||
Balance at December 31, 2017 | 8,308,773 | ||||||||
Unit-based compensation awards | [1] | 140 | |||||||
Contribution of refining logistics and fuels distribution assets | [2] | 2,277,778 | |||||||
Conversion of GP economic interests | (10,586,691) | ||||||||
Balance at June 30, 2018 | 0 | 0 | |||||||
Sale of units for GP Interest | $ 1 | ||||||||
MPC | |||||||||
Stockholders Equity [Line Items] | |||||||||
Contribution from MPC | $ 6 | $ 10 | |||||||
MPC | Refining Logistics & Fuels Distribution | |||||||||
Stockholders Equity [Line Items] | |||||||||
Contribution from MPC | $ 23.7 | ||||||||
[1] | As a result of the unit-based compensation awards issued during the first quarter, MPLX GP contributed less than $1 million in exchange for 140 general partner units to maintain its two percent GP Interest. | ||||||||
[2] | MPC agreed to waive approximately one-third of the first quarter 2018 distributions on the common units issued in connection with this transaction. As a result of this waiver, MPC did not receive $23.7 million of the distributions that would have otherwise accrued on such common units with respect to the first quarter 2018. See Note 4 for information regarding this acquisition. |
Equity - GP_IDR Exchange (Detai
Equity - GP/IDR Exchange (Details) - USD ($) $ in Millions | Feb. 01, 2018 | Jun. 30, 2018 | |
Stockholders Equity Note [Line Items] | |||
Conversion of GP economic interests | 264,413,309 | ||
Partners' Capital Account, Exchanges and Conversions | $ 0 | ||
Limited Partners Common Units | |||
Stockholders Equity Note [Line Items] | |||
Conversion of GP economic interests | 275,000,000 | [1] | 275,000,000 |
Partners' Capital Account, Exchanges and Conversions | $ 10,400 | ||
[1] | MPC agreed to waive approximately one-third of the first quarter 2018 distributions on the common units issued in connection with this transaction. As a result of this waiver, MPC did not receive $23.7 million of the distributions that would have otherwise accrued on such common units with respect to the first quarter 2018. See Note 4 for information regarding this acquisition. |
Equity - Net Income Allocation
Equity - Net Income Allocation (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | |||||
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | ||||
Equity [Abstract] | |||||||
Net income attributable to MPLX LP | $ 453 | [1] | $ 190 | [1] | $ 874 | $ 340 | [1] |
Less: Preferred unit distributions | 20 | 17 | 36 | 33 | |||
General partner's IDRs and other | 72 | 133 | |||||
Net income attributable to MPLX LP available to general and limited partners | 101 | 174 | |||||
General partner's two percent GP Interest in net income attributable to MPLX LP | 2 | 3 | |||||
Less: General partner’s GP interest in net income attributable to MPLX LP | $ 0 | $ 74 | $ 0 | $ 136 | |||
[1] | Allocation of net income attributable to MPLX LP assumes all earnings for the period had been distributed based on the current period distribution priorities. |
Equity - Cash Distributions (De
Equity - Cash Distributions (Details) - USD ($) $ / shares in Units, $ in Millions | Jul. 25, 2018 | Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 |
Incentive Distribution Made to Managing Member or General Partner [Line Items] | |||||
Distributions declared (including IDRs) | $ 517 | $ 311 | $ 1,000 | $ 590 | |
General partner's distributions | 0 | 6 | 0 | 11 | |
General partner's incentive distribution rights | 0 | 70 | 0 | 130 | |
Total general partner's distributions | 0 | 76 | 0 | 141 | |
Partners' distributions | 517 | 311 | 1,000 | 590 | |
Limited Partners Common Units | |||||
Incentive Distribution Made to Managing Member or General Partner [Line Items] | |||||
Partners' distributions | 497 | 218 | 964 | 416 | |
Preferred Units | |||||
Incentive Distribution Made to Managing Member or General Partner [Line Items] | |||||
Partners' distributions | $ 20 | $ 17 | $ 36 | $ 33 | |
Subsequent Event | |||||
Incentive Distribution Made to Managing Member or General Partner [Line Items] | |||||
Declaration date | Jul. 25, 2018 | ||||
Distributions declared (including IDRs) | $ 497 | ||||
Cash distributions declared per limited partner common unit | $ 0.6275 | ||||
Distribution date | Aug. 14, 2018 | ||||
Date of record | Aug. 6, 2018 |
Redeemable Preferred Units (Nar
Redeemable Preferred Units (Narrative) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | Jul. 25, 2018 | May 13, 2016 |
Series A Convertible Preferred Units | ||
Redeemable Noncontrolling Interest [Line Items] | ||
Issuance of preferred units | 30.8 | |
Dividend rate, percentage | 6.50% | |
Price per share | $ 32.50 | |
Issuance of redeemable preferred units | $ 984 | |
Dividend rate, per-dollar-amount | $ 0.528125 | |
Description | The holders may convert their Preferred units into common units at any time after the third anniversary of the issuance date or prior to liquidation, dissolution or winding up of the Partnership, in full or in part, subject to minimum conversion amounts and conditions. After the fourth anniversary of the issuance date, the Partnership may convert the Preferred units into common units at any time, in whole or in part, subject to certain minimum conversion amounts and conditions, if the closing price of MPLX LP common units is greater than $48.75 for the 20 day trading period immediately preceding the conversion notice date. The conversion rate for the Preferred units shall be the quotient of (a) the sum of (i) $32.50, plus (ii) any unpaid cash distributions on the applicable Preferred unit, divided by (b) $32.50, subject to adjustment for unit distributions, unit splits and similar transactions. The holders of the Preferred units are entitled to vote on an as-converted basis with the common unitholders and will have certain other class voting rights with respect to any amendment to the Partnership Agreement that would adversely affect any rights, preferences or privileges of the Preferred units. In addition, upon certain events involving a change of control the holders of Preferred units may elect, among other potential elections, to convert their Preferred units to common units at the then change of control conversion rate. | |
Subsequent Event | ||
Redeemable Noncontrolling Interest [Line Items] | ||
Distribution Made to Limited Partner, Declaration Date | Jul. 25, 2018 | |
Distribution Made to Limited Partner, Distributions Declared, Per Unit | $ 0.6275 |
Redeemable Preferred Units (Rol
Redeemable Preferred Units (Rollforward of Redeemable Preferred Units) (Details) - USD ($) $ in Millions | 6 Months Ended | |
Jun. 30, 2018 | Jun. 30, 2017 | |
Redeemable Noncontrolling Interest [Line Items] | ||
Balance at December 31, 2017 | $ 1,000 | |
Distributions to unitholders and general partner | (814) | $ (505) |
Balance at June 30, 2018 | 1,003 | |
Series A Convertible Preferred Units | ||
Redeemable Noncontrolling Interest [Line Items] | ||
Balance at December 31, 2017 | 1,000 | |
Net income | 36 | |
Distributions to unitholders and general partner | (33) | |
Balance at June 30, 2018 | $ 1,003 |
Segment Information (Details)
Segment Information (Details) | 6 Months Ended |
Jun. 30, 2018 | |
Segment Reporting [Abstract] | |
Number of reportable segments | 2 |
Segment Information - Segment A
Segment Information - Segment Adjusted EBITDA (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | ||||
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | |||
Segment Reporting Information [Line Items] | ||||||
Total revenues from contracts with customers | $ 1,231 | $ 2,338 | ||||
Rental income | 84 | $ 70 | 163 | $ 139 | ||
Income from equity method investments | 50 | 1 | 111 | [1] | 6 | [1] |
Other income | 1 | 1 | 5 | 4 | ||
Total segment revenues and other income | 1,578 | 916 | 2,998 | 1,802 | ||
L&S | ||||||
Segment Reporting Information [Line Items] | ||||||
Total revenues from contracts with customers | 584 | 1,085 | ||||
G&P | ||||||
Segment Reporting Information [Line Items] | ||||||
Total revenues from contracts with customers | 647 | 1,253 | ||||
Operating Segments | ||||||
Segment Reporting Information [Line Items] | ||||||
Adjusted EBITDA | 867 | 474 | 1,627 | 897 | ||
Operating Segments | L&S | ||||||
Segment Reporting Information [Line Items] | ||||||
Rental income | 190 | 70 | 335 | 137 | ||
Income from equity method investments | 36 | 0 | 80 | 0 | ||
Other income | 12 | 12 | 24 | 24 | ||
Total segment revenues and other income | 822 | 384 | 1,524 | 741 | ||
Adjusted EBITDA | 526 | 184 | 963 | 326 | ||
Capital Expenditure | 25 | 19 | 47 | 27 | ||
Growth Capital Expenditures | 93 | 115 | 247 | 220 | ||
Operating Segments | G&P | ||||||
Segment Reporting Information [Line Items] | ||||||
Rental income | 84 | 70 | 163 | 139 | ||
Income from equity method investments | 14 | 1 | 31 | 6 | ||
Other income | 13 | 14 | 28 | 27 | ||
Total segment revenues and other income | 756 | 532 | 1,474 | 1,061 | ||
Adjusted EBITDA | 341 | 290 | 664 | 571 | ||
Capital Expenditure | 8 | 4 | 11 | 8 | ||
Growth Capital Expenditures | 406 | 265 | 677 | 431 | ||
Equity method investment capital expenditures | 113 | 81 | 167 | 205 | ||
Service [Member] | ||||||
Segment Reporting Information [Line Items] | ||||||
Total revenues from contracts with customers | 410 | 286 | 792 | 546 | ||
Service [Member] | L&S | ||||||
Segment Reporting Information [Line Items] | ||||||
Total revenues from contracts with customers | 32 | 60 | ||||
Service [Member] | G&P | ||||||
Segment Reporting Information [Line Items] | ||||||
Total revenues from contracts with customers | 378 | 732 | ||||
Service [Member] | Operating Segments | L&S | ||||||
Segment Reporting Information [Line Items] | ||||||
Total revenues from contracts with customers | 581 | 302 | 1,080 | 580 | ||
Service [Member] | Operating Segments | G&P | ||||||
Segment Reporting Information [Line Items] | ||||||
Total revenues from contracts with customers | 378 | 254 | 732 | 491 | ||
Product [Member] | ||||||
Segment Reporting Information [Line Items] | ||||||
Total revenues from contracts with customers | 206 | 191 | 413 | 394 | ||
Product [Member] | Operating Segments | L&S | ||||||
Segment Reporting Information [Line Items] | ||||||
Total revenues from contracts with customers | 3 | 0 | 5 | 0 | ||
Product [Member] | Operating Segments | G&P | ||||||
Segment Reporting Information [Line Items] | ||||||
Total revenues from contracts with customers | $ 267 | $ 193 | $ 520 | $ 398 | ||
[1] | “Income/(loss) from equity method investments” includes the impact of any basis differential amortization or accretion. |
Segment Information - Reconcili
Segment Information - Reconciliation to Net Income (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | ||||
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | |||
Segment Reporting, Revenue Reconciling Item [Line Items] | ||||||
Depreciation and amortization | $ (188) | $ (164) | $ (364) | $ (351) | ||
Income Tax Expense (Benefit) | (1) | (2) | (5) | (2) | ||
Amortization of Debt Issuance Costs | (30) | (25) | ||||
Allocated Share-based Compensation Expense | (5) | (3) | (9) | (6) | ||
Interest and Other Financial Costs | (136) | (74) | (250) | (140) | ||
Income from equity method investments | 50 | 1 | 111 | [1] | 6 | [1] |
Proceeds from Equity Method Investment, Distribution, Return of Capital | (175) | (66) | ||||
Derivative Instruments Not Designated as Hedging Instruments, Unrealized Gain (Loss), Net | (8) | 3 | (1) | 19 | ||
Acquisition Costs, Period Cost | 0 | 0 | (3) | (4) | ||
Net income | 456 | 191 | 879 | 378 | ||
Operating Segments | ||||||
Segment Reporting, Revenue Reconciling Item [Line Items] | ||||||
Adjusted EBITDA | 867 | 474 | 1,627 | 897 | ||
Amortization of Debt Issuance Costs | (15) | (13) | (31) | (25) | ||
Segment Reconciling Items [Member] | ||||||
Segment Reporting, Revenue Reconciling Item [Line Items] | ||||||
Proceeds from Equity Method Investment, Distribution, Return of Capital | (112) | (33) | (202) | (66) | ||
Adjusted EBITDA attributable to noncontrolling interests | 4 | 2 | 6 | 3 | ||
Adjusted EBITDA attributable to Predecessor | 0 | 0 | 0 | 47 | ||
L&S | Operating Segments | ||||||
Segment Reporting, Revenue Reconciling Item [Line Items] | ||||||
Adjusted EBITDA | 526 | 184 | 963 | 326 | ||
Income from equity method investments | 36 | 0 | 80 | 0 | ||
G&P | Operating Segments | ||||||
Segment Reporting, Revenue Reconciling Item [Line Items] | ||||||
Adjusted EBITDA | 341 | 290 | 664 | 571 | ||
Income from equity method investments | $ 14 | $ 1 | $ 31 | $ 6 | ||
[1] | “Income/(loss) from equity method investments” includes the impact of any basis differential amortization or accretion. |
Segment Information - Assets by
Segment Information - Assets by Segment (Details) - USD ($) $ in Millions | Jun. 30, 2018 | Dec. 31, 2017 |
Segment Reporting, Other Significant Reconciling Item [Line Items] | ||
Equity method investments | $ 4,042 | $ 4,010 |
Cash and cash equivalents | 3 | 5 |
Assets | 21,412 | 19,500 |
L&S | Operating Segments | ||
Segment Reporting, Other Significant Reconciling Item [Line Items] | ||
Equity method investments | 1,140 | 1,150 |
Assets | 5,982 | 4,611 |
G&P | Operating Segments | ||
Segment Reporting, Other Significant Reconciling Item [Line Items] | ||
Equity method investments | 2,900 | 2,860 |
Assets | $ 15,427 | $ 14,884 |
Inventories (Summary of Invento
Inventories (Summary of Inventories) (Details) - USD ($) $ in Millions | Jun. 30, 2018 | Dec. 31, 2017 |
Inventory Disclosure [Abstract] | ||
NGLs | $ 8 | $ 4 |
Line fill | 9 | 8 |
Spare parts, materials and supplies | 56 | 53 |
Total inventories | $ 73 | $ 65 |
Property, Plant and Equipment81
Property, Plant and Equipment (Summary of Property, Plant and Equipment) (Details) - USD ($) $ in Millions | Jun. 30, 2018 | Dec. 31, 2017 |
Property, Plant and Equipment [Line Items] | ||
Property, plant and equipment, gross | $ 16,974 | $ 14,462 |
Less accumulated depreciation | 3,332 | 2,275 |
Property, plant and equipment, net | 13,642 | 12,187 |
Natural gas gathering and NGL transportation pipelines and facilities | ||
Property, Plant and Equipment [Line Items] | ||
Property, plant and equipment, gross | 5,353 | 5,178 |
Processing, fractionation and storage facilities | ||
Property, Plant and Equipment [Line Items] | ||
Property, plant and equipment, gross | 4,885 | 3,893 |
Pipelines and related assets | ||
Property, Plant and Equipment [Line Items] | ||
Property, plant and equipment, gross | 2,432 | 2,253 |
Barges and towing vessels | ||
Property, Plant and Equipment [Line Items] | ||
Property, plant and equipment, gross | 597 | 490 |
Terminals and related assets | ||
Property, Plant and Equipment [Line Items] | ||
Property, plant and equipment, gross | 831 | 821 |
Refineries and related assets | ||
Property, Plant and Equipment [Line Items] | ||
Property, plant and equipment, gross | 922 | 0 |
Land, building, office equipment and other | ||
Property, Plant and Equipment [Line Items] | ||
Property, plant and equipment, gross | 892 | 770 |
Construction-in-progress | ||
Property, Plant and Equipment [Line Items] | ||
Property, plant and equipment, gross | $ 1,062 | $ 1,057 |
Fair Value Measurements - Recur
Fair Value Measurements - Recurring - Financial Instruments by Valuation Hierarchy (Details) - USD ($) | 6 Months Ended | |
Jun. 30, 2018 | Dec. 31, 2017 | |
Fair Value, Inputs, Level 3 [Member] | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Embedded Derivative Renewal Term | 5 years | |
Fair Value, Measurements, Recurring [Member] | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Derivative asset | $ 0 | $ 0 |
Derivative liability | 68,000,000 | 66,000,000 |
Commodity contracts | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Derivative asset | 0 | 0 |
Derivative liability | $ 2,000,000 | 2,000,000 |
Embedded derivatives in commodity contracts | Fair Value, Inputs, Level 3 [Member] | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Fair Value Inputs Probability of Renewal | 65.00% | |
Fair Value Inputs Probability of Renewal Second Term | 84.00% | |
Embedded derivatives in commodity contracts | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Derivative asset | $ 0 | 0 |
Derivative liability | 66,000,000 | $ 64,000,000 |
Minimum [Member] | Commodity contracts | Fair Value, Inputs, Level 3 [Member] | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Fair Value Inputs Forward Commodity Price | 0.70 | |
Maximum [Member] | Commodity contracts | Fair Value, Inputs, Level 3 [Member] | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Fair Value Inputs Forward Commodity Price | $ 1.58 |
Fair Value Measurments - Recurr
Fair Value Measurments - Recurring - Significant Unobservable Inputs in Level 3 Valuation (Details) - Fair Value, Inputs, Level 3 [Member] | 6 Months Ended |
Jun. 30, 2018 | |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] | |
Embedded Derivative Renewal Term | 5 years |
Embedded derivatives in commodity contracts | |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] | |
Fair Value Inputs Probability of Renewal | 65.00% |
Fair Value Inputs Probability of Renewal Second Term | 84.00% |
Fair Value Measurements - Rec84
Fair Value Measurements - Recurring - Changes in Level 3 Measurements (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | |||
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | ||
Commodity Derivative Contracts (net) | |||||
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | |||||
Fair value at beginning of period | $ (2) | $ 0 | $ (2) | $ (6) | |
Total gains (losses) (realized and unrealized) included in earnings | [1] | (1) | 2 | (1) | 7 |
Settlements | 1 | 0 | 1 | 1 | |
Fair value at end of period | (2) | 2 | (2) | 2 | |
The amount of total gains (losses) for the period included in earnings attributable to the change in unrealized losses relating to liabilities still held at end of period | (1) | 2 | 0 | 5 | |
Embedded Derivatives in Commodity Contracts (net) | |||||
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | |||||
Fair value at beginning of period | (58) | (44) | (64) | (54) | |
Total gains (losses) (realized and unrealized) included in earnings | [1] | (11) | 0 | (8) | 8 |
Settlements | 3 | 1 | 6 | 3 | |
Fair value at end of period | (66) | (43) | (66) | (43) | |
The amount of total gains (losses) for the period included in earnings attributable to the change in unrealized losses relating to liabilities still held at end of period | $ (10) | $ (1) | $ (5) | $ 7 | |
[1] | Gains and losses on Commodity Derivative Contracts classified as Level 3 are recorded in “Product sales” on the Consolidated Statements of Income. Gains and losses related to derivatives embedded in commodity contracts are recorded in “Purchased product costs” and “Cost of revenues” on the Consolidated Statements of Income. |
Fair Value Measurements - Repor
Fair Value Measurements - Reported (Details) - USD ($) $ in Millions | Jun. 30, 2018 | Dec. 31, 2017 |
Reported Value Measurement [Member] | ||
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
Long-term debt | $ 11,946 | $ 6,966 |
SMR liability | 89 | 91 |
Estimate of Fair Value Measurement [Member] | ||
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
Long-term debt | 12,021 | 7,718 |
SMR liability | $ 97 | $ 104 |
Derivative Financial Instrume86
Derivative Financial Instruments - Volume of Commodity Derivative Activity (Details) - Not Designated as Hedging Instrument [Member] - Commodity contracts | Jun. 30, 2018MMBTUgal |
Short | |
Derivative [Line Items] | |
Nonmonetary Notional Amount of Price Risk Derivatives of Natural Gas Liquids | gal | 4,830,001 |
Long | |
Derivative [Line Items] | |
Nonmonetary Notional Amount of Price Risk Derivatives Of Natural Gas | MMBTU | 467,559 |
Derivative Financial Instrume87
Derivative Financial Instruments - Embedded Derivatives in Commodity Contracts (Details) $ in Millions | 6 Months Ended | ||
Jun. 30, 2018USD ($) | Dec. 31, 2017USD ($) | ||
Natural Gas [Member] | Embedded derivatives in commodity contracts | |||
Derivative [Line Items] | |||
Number of Renewals | 2 | ||
Embedded Derivative Renewal Term | 5 years | ||
Embedded Derivative Fair Value of Embedded Derivative Liability Including Inception Value Allocable to Host Contract | $ 66 | $ 64 | |
Not Designated as Hedging Instrument [Member] | Commodity contracts | |||
Derivative [Line Items] | |||
Derivative Liability, Fair Value, Gross Liability | [1] | 68 | 66 |
Not Designated as Hedging Instrument [Member] | Other Noncurrent Liabilities [Member] | Commodity contracts | |||
Derivative [Line Items] | |||
Derivative Liability, Fair Value, Gross Liability | [1] | $ 54 | $ 52 |
[1] | Includes embedded derivatives in commodity contracts as discussed above. |
Derivative Financial Instrume88
Derivative Financial Instruments - Derivatives Balance Sheet Location (Details) - Not Designated as Hedging Instrument [Member] - Commodity contracts - USD ($) $ in Millions | Jun. 30, 2018 | Dec. 31, 2017 | |
Derivatives, Fair Value [Line Items] | |||
Derivative Asset, Fair Value, Gross Asset | [1] | $ 0 | $ 0 |
Derivative Liability, Fair Value, Gross Liability | [1] | 68 | 66 |
Other current assets [Member] | |||
Derivatives, Fair Value [Line Items] | |||
Derivative Asset, Fair Value, Gross Asset | [1] | 0 | 0 |
Other current liabilities [Member] | |||
Derivatives, Fair Value [Line Items] | |||
Derivative Liability, Fair Value, Gross Liability | [1] | 14 | 14 |
Other noncurrent assets [Member] | |||
Derivatives, Fair Value [Line Items] | |||
Derivative Asset, Fair Value, Gross Asset | [1] | $ 0 | $ 0 |
[1] | Includes embedded derivatives in commodity contracts as discussed above. |
Derivatives Financial Instrumen
Derivatives Financial Instruments - Derivative Income Statement Location (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | ||
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | |
Derivative [Line Items] | ||||
Unrealized gain (loss) | $ (8) | $ 3 | $ (1) | $ 19 |
Total gain (loss) | (12) | 1 | (8) | 14 |
Product sales | ||||
Derivative [Line Items] | ||||
Realized gain (loss) | (1) | 0 | (1) | (1) |
Unrealized gain (loss) | 0 | 2 | 1 | 9 |
Total gain (loss) | (1) | 2 | 0 | 8 |
Purchased product costs | ||||
Derivative [Line Items] | ||||
Realized gain (loss) | (3) | (2) | (6) | (4) |
Unrealized gain (loss) | (8) | 1 | (2) | 10 |
Total gain (loss) | (11) | (1) | (8) | 6 |
Cost of revenues | ||||
Derivative [Line Items] | ||||
Realized gain (loss) | 0 | 0 | 0 | 0 |
Unrealized gain (loss) | 0 | 0 | 0 | 0 |
Total gain (loss) | $ 0 | $ 0 | $ 0 | $ 0 |
Debt - Summary of Outstanding B
Debt - Summary of Outstanding Borrowings (Detail) - USD ($) $ in Millions | 6 Months Ended | |||||
Jun. 30, 2018 | Feb. 08, 2018 | Jan. 02, 2018 | Dec. 31, 2017 | Jul. 21, 2017 | Feb. 10, 2017 | |
Debt Instrument [Line Items] | ||||||
Total | $ 12,357 | $ 7,362 | ||||
Unamortized debt issuance costs | (78) | (27) | ||||
Unamortized discount | (404) | (389) | ||||
Amounts due within one year | (1) | (1) | ||||
Total long-term debt due after one year | 11,874 | 6,945 | ||||
Senior Notes [Member] | MPLX LP | ||||||
Debt Instrument [Line Items] | ||||||
Long-term debt, gross | $ 5,500 | |||||
Capital Lease Obligations [Member] | Marathon Pipe Line LLC [Member] | ||||||
Debt Instrument [Line Items] | ||||||
Capital lease obligations due 2020 | 7 | 7 | ||||
Bank revolving credit facility due 2022 | MPLX LP | ||||||
Debt Instrument [Line Items] | ||||||
Line of Credit Facility, Maximum Borrowing Capacity | $ 2,250 | |||||
Repayments of Long-term Lines of Credit | 555 | |||||
Bank revolving credit facility due 2022 | Line of Credit [Member] | MPLX LP | ||||||
Debt Instrument [Line Items] | ||||||
Long-term debt, gross | 0 | 505 | ||||
5.500% senior notes due February 2023 | Senior Notes [Member] | MPLX LP | ||||||
Debt Instrument [Line Items] | ||||||
Long-term debt, gross | 710 | 710 | ||||
Senior Notes Due March 2023 [Member] | Senior Notes [Member] | MPLX LP | ||||||
Debt Instrument [Line Items] | ||||||
Long-term debt, gross | 500 | 0 | ||||
4.500% senior notes due July 2023 | Senior Notes [Member] | MPLX LP | ||||||
Debt Instrument [Line Items] | ||||||
Long-term debt, gross | 989 | 989 | ||||
4.875% senior notes due December 2024 | Senior Notes [Member] | MPLX LP | ||||||
Debt Instrument [Line Items] | ||||||
Long-term debt, gross | 1,149 | 1,149 | ||||
4.000% senior notes due February 2025 | Senior Notes [Member] | MPLX LP | ||||||
Debt Instrument [Line Items] | ||||||
Long-term debt, gross | 500 | 500 | ||||
4.875% senior notes due June 2025 | Senior Notes [Member] | MPLX LP | ||||||
Debt Instrument [Line Items] | ||||||
Long-term debt, gross | 1,189 | 1,189 | ||||
4.125% senior notes due March 2027 | Senior Notes [Member] | MPLX LP | ||||||
Debt Instrument [Line Items] | ||||||
Long-term debt, gross | 1,250 | 1,250 | $ 1,250 | |||
Senior Notes Due March 2028 [Member] | Senior Notes [Member] | MPLX LP | ||||||
Debt Instrument [Line Items] | ||||||
Long-term debt, gross | 1,250 | 0 | ||||
Senior Notes Due April 2038 [Member] | Senior Notes [Member] | MPLX LP | ||||||
Debt Instrument [Line Items] | ||||||
Long-term debt, gross | 1,750 | 0 | ||||
5.200% senior notes due March 2047 | Senior Notes [Member] | MPLX LP | ||||||
Debt Instrument [Line Items] | ||||||
Long-term debt, gross | 1,000 | 1,000 | $ 1,000 | |||
Senior Notes Due April 2048 [Member] | Senior Notes [Member] | MPLX LP | ||||||
Debt Instrument [Line Items] | ||||||
Long-term debt, gross | 1,500 | 0 | ||||
Senior Notes Due April 2058 [Member] | Senior Notes [Member] | MPLX LP | ||||||
Debt Instrument [Line Items] | ||||||
Long-term debt, gross | 500 | 0 | ||||
MarkWest - 4.500% - 5.500% senior notes, due 2023-2025 | Senior Notes [Member] | MarkWest [Member] | ||||||
Debt Instrument [Line Items] | ||||||
Long-term debt, gross | $ 63 | $ 63 | ||||
MPLX 364-Day Term Loan [Member] | MPLX LP | ||||||
Debt Instrument [Line Items] | ||||||
Current borrowing capacity | $ 4,100 |
Debt Debt - Summary of Outstand
Debt Debt - Summary of Outstanding Borrowings - Interest Rates and Table Due Dates (Details) | 6 Months Ended | |
Jun. 30, 2018 | Feb. 10, 2017 | |
MarkWest [Member] | Senior Notes [Member] | 5.500% senior notes due February 2023 | ||
Debt Instrument [Line Items] | ||
Debt Instrument, Interest Rate, Stated Percentage | 5.50% | |
Debt Instrument, Maturity Date | Feb. 15, 2023 | |
MarkWest [Member] | Senior Notes [Member] | 4.500% senior notes due July 2023 | ||
Debt Instrument [Line Items] | ||
Debt Instrument, Interest Rate, Stated Percentage | 4.50% | |
Debt Instrument, Maturity Date | Jul. 15, 2023 | |
MarkWest [Member] | Senior Notes [Member] | 4.875% senior notes due December 2024 | ||
Debt Instrument [Line Items] | ||
Debt Instrument, Interest Rate, Stated Percentage | 4.875% | |
Debt Instrument, Maturity Date | Dec. 1, 2024 | |
MarkWest [Member] | Senior Notes [Member] | 4.875% senior notes due June 2025 | ||
Debt Instrument [Line Items] | ||
Debt Instrument, Interest Rate, Stated Percentage | 4.875% | |
Debt Instrument, Maturity Date | Jun. 1, 2025 | |
MPLX LP | Line of Credit [Member] | Bank revolving credit facility due 2022 | ||
Debt Instrument [Line Items] | ||
Expiration date | Jul. 21, 2022 | |
MPLX LP | Senior Notes [Member] | 5.500% senior notes due February 2023 | ||
Debt Instrument [Line Items] | ||
Debt Instrument, Interest Rate, Stated Percentage | 5.50% | |
Debt Instrument, Maturity Date | Feb. 15, 2023 | |
MPLX LP | Senior Notes [Member] | Senior Notes Due March 2023 [Member] | ||
Debt Instrument [Line Items] | ||
Debt Instrument, Interest Rate, Stated Percentage | 3.375% | |
Debt Instrument, Maturity Date | Mar. 15, 2023 | |
MPLX LP | Senior Notes [Member] | 4.500% senior notes due July 2023 | ||
Debt Instrument [Line Items] | ||
Debt Instrument, Interest Rate, Stated Percentage | 4.50% | |
Debt Instrument, Maturity Date | Jul. 15, 2023 | |
MPLX LP | Senior Notes [Member] | 4.875% senior notes due December 2024 | ||
Debt Instrument [Line Items] | ||
Debt Instrument, Interest Rate, Stated Percentage | 4.875% | |
Debt Instrument, Maturity Date | Dec. 1, 2024 | |
MPLX LP | Senior Notes [Member] | 4.000% senior notes due February 2025 | ||
Debt Instrument [Line Items] | ||
Debt Instrument, Interest Rate, Stated Percentage | 4.00% | |
Debt Instrument, Maturity Date | Feb. 15, 2025 | |
MPLX LP | Senior Notes [Member] | 4.875% senior notes due June 2025 | ||
Debt Instrument [Line Items] | ||
Debt Instrument, Interest Rate, Stated Percentage | 4.875% | |
Debt Instrument, Maturity Date | Jun. 1, 2025 | |
MPLX LP | Senior Notes [Member] | 4.125% senior notes due March 2027 | ||
Debt Instrument [Line Items] | ||
Debt Instrument, Interest Rate, Stated Percentage | 4.125% | 4.125% |
Debt Instrument, Maturity Date | Mar. 1, 2027 | |
MPLX LP | Senior Notes [Member] | Senior Notes Due March 2028 [Member] | ||
Debt Instrument [Line Items] | ||
Debt Instrument, Interest Rate, Stated Percentage | 4.00% | |
Debt Instrument, Maturity Date | Mar. 15, 2028 | |
MPLX LP | Senior Notes [Member] | Senior Notes Due April 2038 [Member] | ||
Debt Instrument [Line Items] | ||
Debt Instrument, Interest Rate, Stated Percentage | 4.50% | |
Debt Instrument, Maturity Date | Apr. 15, 2038 | |
MPLX LP | Senior Notes [Member] | 5.200% senior notes due March 2047 | ||
Debt Instrument [Line Items] | ||
Debt Instrument, Interest Rate, Stated Percentage | 5.20% | 5.20% |
Debt Instrument, Maturity Date | Mar. 1, 2047 | |
MPLX LP | Senior Notes [Member] | Senior Notes Due April 2048 [Member] | ||
Debt Instrument [Line Items] | ||
Debt Instrument, Interest Rate, Stated Percentage | 4.70% | |
Debt Instrument, Maturity Date | Apr. 15, 2048 | |
MPLX LP | Senior Notes [Member] | Senior Notes Due April 2058 [Member] | ||
Debt Instrument [Line Items] | ||
Debt Instrument, Interest Rate, Stated Percentage | 4.90% | |
Debt Instrument, Maturity Date | Apr. 15, 2058 | |
Marathon Pipe Line LLC [Member] | Capital Lease Obligations [Member] | ||
Debt Instrument [Line Items] | ||
Capital Lease Due Date Year | 2,020 |
Debt - Additional Information (
Debt - Additional Information (Detail) - MPLX LP - USD ($) $ in Millions | Feb. 08, 2018 | Jul. 21, 2017 | Oct. 27, 2015 | Jun. 30, 2018 | Jun. 30, 2018 | Jan. 02, 2018 | Dec. 31, 2017 | Feb. 10, 2017 | Dec. 31, 2016 |
MPLX Revolver [Member] | |||||||||
Debt Instrument [Line Items] | |||||||||
Line of Credit Facility, Maximum Borrowing Capacity | $ 2,000 | ||||||||
Debt Instrument, Term | 5 years | ||||||||
Bank revolving credit facility due 2022 | |||||||||
Debt Instrument [Line Items] | |||||||||
Line of Credit Facility, Maximum Borrowing Capacity | $ 2,250 | ||||||||
Debt Instrument, Term | 5 years | ||||||||
Proceeds from Lines of Credit | $ 50 | ||||||||
Debt Instrument, Interest Rate, Effective Percentage | 2.975% | 2.975% | |||||||
Letters of Credit Outstanding | $ 3 | $ 3 | |||||||
Line of Credit Facility, Remaining Borrowing Capacity | $ 2,247 | $ 2,247 | |||||||
Line of Credit Facility, Remaining Borrowing Capacity, Percentage | 99.90% | 99.90% | |||||||
MPLX 364-Day Term Loan [Member] | |||||||||
Debt Instrument [Line Items] | |||||||||
Current borrowing capacity | $ 4,100 | ||||||||
Repayments of Short-term Debt | $ 4,100 | ||||||||
Line of Credit [Member] | Bank revolving credit facility due 2022 | |||||||||
Debt Instrument [Line Items] | |||||||||
Long-term debt, gross | $ 0 | $ 0 | $ 505 | ||||||
Senior Notes [Member] | |||||||||
Debt Instrument [Line Items] | |||||||||
Long-term debt, gross | $ 5,500 | ||||||||
Debt Instrument, Face Amount | $ 2,250 | ||||||||
Proceeds from new debt | 2,220 | ||||||||
Senior Notes [Member] | Senior Notes Due March 2023 [Member] | |||||||||
Debt Instrument [Line Items] | |||||||||
Long-term debt, gross | $ 500 | $ 500 | 0 | ||||||
Debt Instrument, Interest Rate, Stated Percentage | 3.375% | 3.375% | |||||||
Percent of Par | 99.931% | ||||||||
Senior Notes [Member] | 4.125% senior notes due March 2027 | |||||||||
Debt Instrument [Line Items] | |||||||||
Long-term debt, gross | $ 1,250 | $ 1,250 | 1,250 | $ 1,250 | |||||
Debt Instrument, Interest Rate, Stated Percentage | 4.125% | 4.125% | 4.125% | ||||||
Senior Notes [Member] | 5.200% senior notes due March 2047 | |||||||||
Debt Instrument [Line Items] | |||||||||
Long-term debt, gross | $ 1,000 | $ 1,000 | 1,000 | $ 1,000 | |||||
Debt Instrument, Interest Rate, Stated Percentage | 5.20% | 5.20% | 5.20% | ||||||
Senior Notes [Member] | Senior Notes Due March 2028 [Member] | |||||||||
Debt Instrument [Line Items] | |||||||||
Long-term debt, gross | $ 1,250 | $ 1,250 | 0 | ||||||
Debt Instrument, Interest Rate, Stated Percentage | 4.00% | 4.00% | |||||||
Percent of Par | 99.551% | ||||||||
Senior Notes [Member] | Senior Notes Due April 2038 [Member] | |||||||||
Debt Instrument [Line Items] | |||||||||
Long-term debt, gross | $ 1,750 | $ 1,750 | 0 | ||||||
Debt Instrument, Interest Rate, Stated Percentage | 4.50% | 4.50% | |||||||
Percent of Par | 98.811% | ||||||||
Senior Notes [Member] | Senior Notes Due April 2048 [Member] | |||||||||
Debt Instrument [Line Items] | |||||||||
Long-term debt, gross | $ 1,500 | $ 1,500 | 0 | ||||||
Debt Instrument, Interest Rate, Stated Percentage | 4.70% | 4.70% | |||||||
Percent of Par | 99.348% | ||||||||
Senior Notes [Member] | Senior Notes Due April 2058 [Member] | |||||||||
Debt Instrument [Line Items] | |||||||||
Long-term debt, gross | $ 500 | $ 500 | $ 0 | ||||||
Debt Instrument, Interest Rate, Stated Percentage | 4.90% | 4.90% | |||||||
Percent of Par | 99.289% |
Revenue Effect of ASC 606 Adopt
Revenue Effect of ASC 606 Adoption (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | |||
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017 | |
Total revenues from contracts with customers | $ 1,231 | $ 2,338 | |||
Rental income | 84 | $ 70 | 163 | $ 139 | |
Rental cost of sales | 33 | $ 13 | 62 | $ 25 | |
Oil Allowances | |||||
Cost of revenues | 2 | 3 | |||
Difference between Revenue Guidance in Effect before and after Topic 606 | |||||
Rental income | 15 | 31 | |||
Rental cost of sales | 15 | 31 | |||
Difference between Revenue Guidance in Effect before and after Topic 606 | Third Party Reimbursements | |||||
Total revenues from contracts with customers | 86 | 164 | |||
Rental income | 15 | 31 | |||
Cost of revenues | 86 | 164 | |||
Rental cost of sales | 15 | 31 | |||
Difference between Revenue Guidance in Effect before and after Topic 606 | Non-cash Consideration | |||||
Cost of revenues | 13 | 25 | |||
Service revenue - product related | 16 | 27 | |||
Difference between Revenue Guidance in Effect before and after Topic 606 | Percent-of-Proceeds | |||||
Service revenue - product related | 35 | 68 | |||
Difference between Revenue Guidance in Effect before and after Topic 606 | Imbalances | |||||
Total revenues from contracts with customers | 7 | 19 | |||
Cost of revenues | 7 | 19 | |||
Difference between Revenue Guidance in Effect before and after Topic 606 | Oil Allowances | |||||
Total revenues from contracts with customers | 2 | 3 | |||
ASC 606 | Inventories | |||||
Cumulative effect of new accounting principle in period of adoption | $ 3 | $ 3 | $ 1 | ||
ASC 606 | Property, plant and equipment | |||||
Cumulative effect of new accounting principle in period of adoption | $ (3) |
Revenue ASC 606 Cumulative Effe
Revenue ASC 606 Cumulative Effect Adjustments (Details) - USD ($) $ in Millions | Jun. 30, 2018 | Dec. 31, 2017 | |
Long-term deferred revenue | $ 58 | $ 42 | |
Inventories | 73 | 65 | |
Property, plant and equipment, net | 13,642 | 12,187 | |
Common unitholders - public | 6,802 | 9,827 | |
Cumulative Adjusted 606 Balance | |||
Long-term deferred revenue | 39 | ||
Inventories | 66 | ||
Property, plant and equipment, net | 12,184 | ||
ASC 606 | |||
Long-term deferred revenue | 6 | 5 | [1] |
ASC 606 | Inventories | |||
Cumulative effect of new accounting principle in period of adoption | 3 | 1 | |
ASC 606 | Property, plant and equipment | |||
Cumulative effect of new accounting principle in period of adoption | (3) | ||
ASC 606 | Long-term deferred revenue | |||
Cumulative effect of new accounting principle in period of adoption | (3) | ||
Limited Partners Common Units | Public | |||
Common unitholders - public | $ 8,366 | 8,379 | |
Limited Partners Common Units | Public | Cumulative Adjusted 606 Balance | |||
Common unitholders - public | 8,380 | ||
Limited Partners Common Units | Public | ASC 606 | Equity | |||
Cumulative effect of new accounting principle in period of adoption | $ 1 | ||
[1] | Balance represents ASC 606 portion of each respective line item. |
Revenue Impact of Adoption (Det
Revenue Impact of Adoption (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | ||||||
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | |||||
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] | ||||||||
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net | $ (12) | $ 1 | $ (8) | $ 14 | ||||
Total revenues from contracts with customers | 1,231 | 2,338 | ||||||
Revenues and other income: | ||||||||
Rental income | 84 | 70 | 163 | 139 | ||||
Costs and expenses: | ||||||||
Rental cost of sales | 33 | 13 | 62 | 25 | ||||
Depreciation and amortization | (188) | (164) | (364) | (351) | ||||
Net income | 456 | 191 | 879 | 378 | ||||
Product sales | ||||||||
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] | ||||||||
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net | (1) | 2 | 0 | 8 | ||||
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | ||||||||
Revenues and other income: | ||||||||
Rental income | 69 | 132 | ||||||
Costs and expenses: | ||||||||
Rental cost of sales | 18 | 31 | ||||||
Depreciation and amortization | (189) | (365) | ||||||
Net income | 452 | 877 | ||||||
Difference between Revenue Guidance in Effect before and after Topic 606 | ||||||||
Revenues and other income: | ||||||||
Rental income | 15 | 31 | ||||||
Costs and expenses: | ||||||||
Rental cost of sales | 15 | 31 | ||||||
Depreciation and amortization | (1) | (1) | ||||||
Net income | 4 | 2 | ||||||
Service [Member] | ||||||||
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] | ||||||||
Total revenues from contracts with customers | 410 | 286 | 792 | 546 | ||||
Revenues and other income: | ||||||||
Revenue from Contract with Customer, Excluding Assessed Tax, Related Parties | 549 | 270 | 1,020 | 525 | ||||
Service [Member] | Calculated under Revenue Guidance in Effect before Topic 606 [Member] | ||||||||
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] | ||||||||
Total revenues from contracts with customers | 326 | 631 | ||||||
Revenues and other income: | ||||||||
Revenue from Contract with Customer, Excluding Assessed Tax, Related Parties | 551 | 1,023 | ||||||
Service [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 | ||||||||
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] | ||||||||
Total revenues from contracts with customers | 84 | 161 | ||||||
Revenues and other income: | ||||||||
Revenue from Contract with Customer, Excluding Assessed Tax, Related Parties | (2) | (3) | ||||||
Service, Other [Member] | ||||||||
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] | ||||||||
Total revenues from contracts with customers | 51 | 0 | 95 | 0 | ||||
Service, Other [Member] | Calculated under Revenue Guidance in Effect before Topic 606 [Member] | ||||||||
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] | ||||||||
Total revenues from contracts with customers | 0 | 0 | ||||||
Service, Other [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 | ||||||||
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] | ||||||||
Total revenues from contracts with customers | 51 | 95 | ||||||
Product [Member] | ||||||||
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] | ||||||||
Total revenues from contracts with customers | 206 | 191 | 413 | 394 | ||||
Revenues and other income: | ||||||||
Revenue from Contract with Customer, Excluding Assessed Tax, Related Parties | 13 | 2 | 17 | 4 | ||||
Revenue from Contract with Customer, excluding Assessed Tax and Non-ASC 606 Revenue | [1] | 208 | 414 | |||||
Product [Member] | Calculated under Revenue Guidance in Effect before Topic 606 [Member] | ||||||||
Revenues and other income: | ||||||||
Revenue from Contract with Customer, Excluding Assessed Tax, Related Parties | 11 | 14 | ||||||
Revenue from Contract with Customer, excluding Assessed Tax and Non-ASC 606 Revenue | [2] | 234 | 461 | |||||
Product [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 | ||||||||
Revenues and other income: | ||||||||
Revenue from Contract with Customer, Excluding Assessed Tax, Related Parties | 2 | 3 | ||||||
Revenue from Contract with Customer, excluding Assessed Tax and Non-ASC 606 Revenue | [2] | (26) | (47) | |||||
Oil and Gas, Refining and Marketing [Member] | ||||||||
Costs and expenses: | ||||||||
Cost of Goods and Services Sold | 233 | 139 | [3] | 439 | [3] | 252 | [3] | |
Oil and Gas, Refining and Marketing [Member] | Calculated under Revenue Guidance in Effect before Topic 606 [Member] | ||||||||
Costs and expenses: | ||||||||
Cost of Goods and Services Sold | [3] | 147 | 275 | |||||
Oil and Gas, Refining and Marketing [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 | ||||||||
Costs and expenses: | ||||||||
Cost of Goods and Services Sold | [3] | 86 | 164 | |||||
Natural Gas, Midstream [Member] | ||||||||
Costs and expenses: | ||||||||
Cost of Goods and Services Sold | 204 | $ 140 | 391 | $ 271 | ||||
Natural Gas, Midstream [Member] | Calculated under Revenue Guidance in Effect before Topic 606 [Member] | ||||||||
Costs and expenses: | ||||||||
Cost of Goods and Services Sold | 184 | 347 | ||||||
Natural Gas, Midstream [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 | ||||||||
Costs and expenses: | ||||||||
Cost of Goods and Services Sold | 20 | 44 | ||||||
Other Income [Member] | ||||||||
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] | ||||||||
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net | $ (2) | $ (1) | ||||||
[1] | G&P “Product sales” for the three and six months ended June 30, 2018 includes approximately $2 million and $1 million, respectively, of revenue related to derivative gains and losses and mark-to-market adjustments. | |||||||
[2] | G&P “Product sales” for the three and six months ended June 30, 2018 adds back approximately $2 million and $1 million, respectively, of revenue related to derivative gains and losses and mark-to-market adjustments. | |||||||
[3] | Excludes “Purchased product costs,” “Rental cost of sales,” “Purchases,” “Depreciation and amortization,” “General and administrative expenses,” and “Other taxes.” |
Revenue Disaggregation of Reven
Revenue Disaggregation of Revenue (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | |||
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | ||
Disaggregation of Revenue [Line Items] | |||||
Total revenues from contracts with customers | $ 1,231 | $ 2,338 | |||
Other income | 1 | $ 1 | 5 | $ 4 | |
Total segment revenues and other income | 1,578 | 916 | 2,998 | 1,802 | |
L&S | |||||
Disaggregation of Revenue [Line Items] | |||||
Total revenues from contracts with customers | 584 | 1,085 | |||
G&P | |||||
Disaggregation of Revenue [Line Items] | |||||
Total revenues from contracts with customers | 647 | 1,253 | |||
Other Income [Member] | |||||
Disaggregation of Revenue [Line Items] | |||||
Other income | [1] | 347 | 660 | ||
Product [Member] | |||||
Disaggregation of Revenue [Line Items] | |||||
Revenue from Contract with Customer, Excluding Assessed Tax, Related Parties | 13 | 2 | 17 | 4 | |
Total revenues from contracts with customers | 206 | 191 | 413 | 394 | |
Revenue from Contract with Customer, excluding Assessed Tax and Non-ASC 606 Revenue | [2] | 208 | 414 | ||
Product [Member] | L&S | |||||
Disaggregation of Revenue [Line Items] | |||||
Revenue from Contract with Customer, Excluding Assessed Tax, Related Parties | 2 | 3 | |||
Revenue from Contract with Customer, excluding Assessed Tax and Non-ASC 606 Revenue | 1 | 2 | |||
Product [Member] | G&P | |||||
Disaggregation of Revenue [Line Items] | |||||
Revenue from Contract with Customer, Excluding Assessed Tax, Related Parties | 11 | 14 | |||
Revenue from Contract with Customer, excluding Assessed Tax and Non-ASC 606 Revenue | [2] | 207 | 412 | ||
Service [Member] | |||||
Disaggregation of Revenue [Line Items] | |||||
Revenue from Contract with Customer, Excluding Assessed Tax, Related Parties | 549 | 270 | 1,020 | 525 | |
Total revenues from contracts with customers | 410 | 286 | 792 | 546 | |
Service [Member] | L&S | |||||
Disaggregation of Revenue [Line Items] | |||||
Revenue from Contract with Customer, Excluding Assessed Tax, Related Parties | 549 | 1,020 | |||
Total revenues from contracts with customers | 32 | 60 | |||
Service [Member] | G&P | |||||
Disaggregation of Revenue [Line Items] | |||||
Revenue from Contract with Customer, Excluding Assessed Tax, Related Parties | 0 | 0 | |||
Total revenues from contracts with customers | 378 | 732 | |||
Service, Other [Member] | |||||
Disaggregation of Revenue [Line Items] | |||||
Total revenues from contracts with customers | 51 | $ 0 | 95 | $ 0 | |
Service, Other [Member] | L&S | |||||
Disaggregation of Revenue [Line Items] | |||||
Total revenues from contracts with customers | 0 | 0 | |||
Service, Other [Member] | G&P | |||||
Disaggregation of Revenue [Line Items] | |||||
Total revenues from contracts with customers | $ 51 | $ 95 | |||
[1] | Non-ASC 606 Revenue includes rental income, income from equity method investments, derivative gains and losses, mark-to-market adjustments, and other income. | ||||
[2] | G&P “Product sales” for the three and six months ended June 30, 2018 includes approximately $2 million and $1 million, respectively, of revenue related to derivative gains and losses and mark-to-market adjustments. |
Revenue Contract Balances (Deta
Revenue Contract Balances (Details) $ in Millions | 6 Months Ended | |
Jun. 30, 2018USD ($) | ||
Deferred revenue - related parties, beginning balance | $ 43 | |
Deferred revenue - related parties, ending balance | 41 | |
Long-term deferred revenue, beginning balance | 42 | |
Long-term deferred revenue, ending balance | 58 | |
Long-term deferred revenue - related parties, beginning balance | 43 | |
Long-term deferred revenue - related parties, ending balance | 47 | |
Liability, change in timeframe, performance obligation satisfied, revenue recognized | 0 | |
ASC 606 | ||
Contract assets, beginning balance | 4 | [1] |
Contract assets, additions/(deletions) | 0 | |
Contract assets, revenue recognized | 0 | [2] |
Contract assets, ending balance | 4 | |
Deferred revenue, beginning balance | 5 | [1] |
Deferred revenue, additions/(deletions) | 3 | |
Deferred revenue, revenue recognized | (3) | [2] |
Deferred revenue, ending balance | 5 | |
Deferred revenue - related parties, beginning balance | 42 | [1] |
Deferred revenue - related party, additions/(deletions) | 16 | |
Deferred revenue - related parties, revenue recognized | (18) | [2] |
Deferred revenue - related parties, ending balance | 40 | |
Long-term deferred revenue, beginning balance | 5 | [1] |
Long-term deferred revenue, additions/(deletions) | 1 | |
Long-term deferred revenue, revenue recognized | 0 | [2] |
Long-term deferred revenue, ending balance | 6 | |
Long-term deferred revenue - related parties, beginning balance | 43 | [1] |
Long-term deferred revenue - related party, additions/(deletions) | 4 | |
Long-term deferred revenue - related parties, revenue recognized | 0 | [2] |
Long-term deferred revenue - related parties, ending balance | $ 47 | |
[1] | Balance represents ASC 606 portion of each respective line item. | |
[2] | No revenue was recognized related to past performance obligations in the current period. |
Revenue Remaining Performance O
Revenue Remaining Performance Obligations (Details) $ in Millions | Jun. 30, 2018USD ($) | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | ||
Contract with customer, liability | $ 97 | |
Remaining performance obligation, expected timing of satisfaction, years | 20 years | |
L&S | ||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | ||
2,018 | $ 510 | |
2,019 | 1,012 | |
2,020 | 983 | |
2,021 | 982 | |
2022 and thereafter | 5,705 | |
Total revenue on remaining performance obligations | 9,192 | [1],[2] |
G&P | ||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | ||
2,018 | 67 | [3] |
2,019 | 129 | [3] |
2,020 | 128 | [3] |
2,021 | 128 | [3] |
2022 and thereafter | 503 | [3] |
Total revenue on remaining performance obligations | $ 955 | [1],[2],[3] |
[1] | All fixed consideration from contracts with customers is included in the amounts presented above. Variable consideration that is constrained or not required to be estimated as it reflects our efforts to perform is excluded. | |
[2] | Arrangements deemed implicit leases are included in “Rental income” and are excluded from this table. | |
[3] | Only minimum volume commitments that are deemed fixed are included in the table above. The Partnership has various minimum volume commitments in processing arrangements that vary based on the actual Btu content of the gas received. These amounts are deemed variable consideration and are excluded from the table above. |
Supplemental Cash Flow Inform99
Supplemental Cash Flow Information - Change in Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Millions | Jun. 30, 2018 | Dec. 31, 2017 | Jun. 30, 2017 | Dec. 31, 2016 | |||
Supplemental Cash Flow Elements [Abstract] | |||||||
Cash and cash equivalents | $ 3 | $ 5 | |||||
Restricted cash | [1] | 6 | 4 | ||||
Cash, cash equivalents and restricted cash | $ 9 | [2] | $ 9 | [2] | $ 297 | $ 239 | |
[1] | The restricted cash balance is included within “Other current assets” on the Consolidated Balance Sheets. | ||||||
[2] | As a result of the adoption of ASU 2016-18, the Consolidated Statements of Cash Flows now explain the change during the period of both “Cash and cash equivalents” and restricted cash. |
Supplemental Cash Flow Infor100
Supplemental Cash Flow Information - Summary of Supplemental Cash Flow Information (Detail) - USD ($) $ in Millions | 6 Months Ended | ||
Jun. 30, 2018 | Jun. 30, 2017 | ||
Net cash provided by operating activities included: | |||
Interest paid (net of amounts capitalized) | $ 154 | $ 99 | |
Income Taxes Paid, Net | 1 | 0 | |
Non-cash investing and financing activities: | |||
Net transfers of property, plant and equipment from materials and supplies inventories | 2 | 5 | |
Contribution of fixed assets to joint venture | $ 0 | $ 337 | [1] |
[1] | Contribution of assets to Sherwood Midstream and Sherwood Midstream Holdings. See Note 5. |
Supplemental Cash Flow Infor101
Supplemental Cash Flow Information - Summary of Reconciliation of Additions to Property, Plant and Equipment to Total Capital Expenditures (Detail) - USD ($) $ in Millions | 6 Months Ended | |
Jun. 30, 2018 | Jun. 30, 2017 | |
Supplemental Cash Flow Elements [Abstract] | ||
Increase in capital accruals | $ 115 | $ 33 |
Accumulated Other Comprehens102
Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions | 6 Months Ended | ||
Jun. 30, 2018 | Dec. 31, 2017 | ||
Accumulated Other Comprehensive Income (Loss) [Line Items] | |||
Accumulated other comprehensive loss | [1] | $ (16) | $ (14) |
Other Comprehensive Income (Loss), Net of Tax | [2] | (2) | |
Pension Plan [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] | |||
Accumulated Other Comprehensive Income (Loss) [Line Items] | |||
Accumulated other comprehensive loss | [1] | (14) | (13) |
Other Comprehensive Income (Loss), Net of Tax | [2] | (1) | |
Other Postretirement Benefits Plan [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] | |||
Accumulated Other Comprehensive Income (Loss) [Line Items] | |||
Accumulated other comprehensive loss | [1] | (2) | $ (1) |
Other Comprehensive Income (Loss), Net of Tax | [2] | $ (1) | |
[1] | These components of “Accumulated other comprehensive loss” are included in the computation of net periodic benefit cost by LOOP and Explorer and are therefore included on the Consolidated Statements of Income under the caption “Income from equity method investments.” | ||
[2] | Components of other comprehensive loss - remeasurements relate to actuarial gains and losses as well as amortization of prior service costs. The Partnership records an adjustment to “Comprehensive income” in accordance with its ownership interest in LOOP and Explorer. |
Equity-Based Compensation Pl103
Equity-Based Compensation Plan - Summary of Phantom Unit Award Activity (Details) - Phantom Units | 6 Months Ended |
Jun. 30, 2018$ / sharesshares | |
Number of Units | |
Outstanding at December 31, 2017 | shares | 1,351,523 |
Granted | shares | 412,348 |
Settled | shares | 345,111 |
Forfeited | shares | 92,824 |
Outstanding at June 30, 2018 | shares | 1,325,936 |
Weighted Average Fair Value | |
Outstanding at December 31, 2017 | $ / shares | $ 34.53 |
Granted | $ / shares | 33.84 |
Settled | $ / shares | 34.63 |
Forfeited | $ / shares | 34.64 |
Outstanding at June 30, 2018 | $ / shares | $ 34.29 |
Equity-Based Compensation Pl104
Equity-Based Compensation Plan - Additional Information (Detail) shares in Millions | 6 Months Ended |
Jun. 30, 2018shares | |
Equity Transactions And Share Based Compensation [Line Items] | |
Common Stock, Capital Shares Reserved for Future Issuance | 16 |
Officer | Performance Shares [Member] | MPLX LP 2012 Incentive Compensation Plan [Member] | |
Equity Transactions And Share Based Compensation [Line Items] | |
Percentage paid out in cash | 25.00% |
Percentage paid out in stock | 75.00% |
Equity-Based Compensation Pl105
Equity-Based Compensation Plan - Summary of Performance Unit Award Activity (Detail) - Performance Shares [Member] | 6 Months Ended |
Jun. 30, 2018shares | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] | |
Outstanding at December 31, 2017 | 2,536,594 |
Granted | 0 |
Settled | 538,594 |
Forfeited | (50,000) |
Outstanding at June 30, 2018 | 1,948,000 |
Commitments and Contingencies -
Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions | Sep. 06, 2016 | Jun. 30, 2018 | Dec. 31, 2017 |
Commitments And Contingencies [Line Items] | |||
Accrued liabilities for environmental remediation | $ 16 | $ 13 | |
Payables - related parties | 273 | 516 | |
Contractual commitments to acquire property, plant and equipment | 698 | ||
MPC | |||
Commitments And Contingencies [Line Items] | |||
Payables - related parties | 239 | 470 | |
Environmental Loss Contingency [Member] | MPC | |||
Commitments And Contingencies [Line Items] | |||
Payables - related parties | $ 1 | ||
Receivables from MPC for indemnification of environmental costs | 1 | ||
MarkWest, MarkWest Liberty Midstream, MarkWest Bluestone, Ohio Fractionation, MarkWest Utica EMG [Member] [Member] | |||
Commitments And Contingencies [Line Items] | |||
Loss Contingency, Damages Sought, Value | 10 | ||
Bilfinger Westcon, Inc. [Member] | |||
Commitments And Contingencies [Line Items] | |||
Loss Contingency, Damages Sought, Value | 40 | ||
Apex [Member] | |||
Commitments And Contingencies [Line Items] | |||
Apex litigation settlement amount | $ 10 | ||
Markwest Liberty Midstream [Member] | |||
Commitments And Contingencies [Line Items] | |||
EPA proposed penalty | 0.6 | ||
Estimated cost of proposed supplemental environmental projects | $ 2.4 |