Document and Entity Information - USD ($) $ in Billions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Feb. 13, 2017 |
Jun. 30, 2016 |
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| Document And Entity Information [Abstract] | |||
| Document Type | 10-K | ||
| Amendment Flag | false | ||
| Document Period End Date | Dec. 31, 2016 | ||
| Document Fiscal Year Focus | 2016 | ||
| Document Fiscal Period Focus (Q1,Q2,Q3,FY) | FY | ||
| Trading Symbol | MPC | ||
| Entity Registrant Name | Marathon Petroleum Corp | ||
| Entity Central Index Key | 0001510295 | ||
| Current Fiscal Year End Date | --12-31 | ||
| Entity Well-known Seasoned Issuer | Yes | ||
| Entity Current Reporting Status | Yes | ||
| Entity Voluntary Filers | No | ||
| Entity Filer Category | Large Accelerated Filer | ||
| Entity Common Stock, Shares Outstanding | 527,782,929 | ||
| Entity Public Float | $ 20.0 |
Consolidated Statements of Comprehensive Income - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
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| Statement of Comprehensive Income [Abstract] | |||
| Net income | $ 1,213 | $ 2,868 | $ 2,555 |
| Defined benefit postretirement and post-employment plans: | |||
| Actuarial changes, net of tax of $69, $21 and ($47) | 115 | 34 | (78) |
| Prior service costs, net of tax of ($18), ($24) and ($19) | (31) | (39) | (31) |
| Other comprehensive income (loss) | 84 | (5) | (109) |
| Comprehensive income | 1,297 | 2,863 | 2,446 |
| Less comprehensive income (loss) attributable to: | |||
| Redeemable noncontrolling interest | 41 | 0 | 0 |
| Noncontrolling interests | (2) | 16 | 31 |
| Comprehensive income attributable to MPC | $ 1,258 | $ 2,847 | $ 2,415 |
Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Statement of Comprehensive Income [Abstract] | |||
| Actuarial changes, tax | $ 69 | $ 21 | $ (47) |
| Prior service costs, tax | $ (18) | $ (24) | $ (19) |
Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Statement of Financial Position [Abstract] | ||
| Allowance for doubtful accounts | $ 12 | $ 12 |
| Preferred stock: | ||
| Shares issued | 0 | 0 |
| Shares outstanding | 0 | 0 |
| Par value | $ 0.01 | |
| Shares authorized | 30,000,000 | |
| Common stock: | ||
| Shares issued | 731,000,000 | 729,000,000 |
| Par value | $ 0.01 | |
| Shares authorized | 1,000,000,000 | |
| Treasury stock | (203,000,000) | (198,000,000) |
Redeemable Noncontrolling Interest $ in Millions |
12 Months Ended |
|---|---|
|
Dec. 31, 2016
USD ($)
| |
| Temporary Equity [Abstract] | |
| Redeemable noncontrolling interest, beginning balance | $ 0 |
| Net income (loss) attributable to redeemable noncontrolling interest | 41 |
| Distributions to noncontrolling interests | (25) |
| Issuance of MPLX LP redeemable preferred units | 984 |
| Redeemable noncontrolling interest, ending balance | $ 1,000 |
Description Of The Business And Basis Of Presentation |
12 Months Ended |
|---|---|
Dec. 31, 2016 | |
| Accounting Policies [Abstract] | |
| Description of the Business and Basis of Presentation | Description of the Business and Basis of Presentation Description of the Business – Our business consists of refining and marketing, retail and midstream services conducted primarily in the Midwest, Gulf Coast, East Coast, Northeast and Southeast regions of the United States, through subsidiaries, including Marathon Petroleum Company LP, Speedway LLC and its subsidiaries (“Speedway”) and MPLX LP and its subsidiaries (“MPLX”). See Note 10 for additional information about our operations. Spinoff – On May 25, 2011, the Marathon Oil board of directors approved the spinoff of its Refining, Marketing & Transportation Business (“RM&T Business”) into an independent, publicly traded company, MPC, through the distribution of MPC common stock to the stockholders of Marathon Oil common stock (the “Spinoff”). MPC became an independent, publicly traded company on July 1, 2011. Basis of Presentation – Our results of operations and cash flows consist of consolidated MPC activities. All significant intercompany transactions and accounts have been eliminated. Certain prior period financial statement amounts have been reclassified to conform to current period presentation. In the first quarter of 2016, we revised our segment reporting in connection with the contribution of our inland marine business to MPLX. See Note 4 for additional information. The operating results for our inland marine business and our investment in an ocean vessel joint venture, Crowley Ocean Partners LLC (“Crowley Ocean Partners”) are now reported in our Midstream segment. Previously they were reported as part of our Refining & Marketing segment. Comparable prior period information has been recast to reflect our revised segment presentation. See Note 10 for additional information. |
Summary Of Principal Accounting Policies |
12 Months Ended |
|---|---|
Dec. 31, 2016 | |
| Accounting Policies [Abstract] | |
| Summary Of Principal Accounting Policies | Summary of Principal Accounting Policies Principles applied in consolidation – These consolidated financial statements include the accounts of our majority-owned, controlled subsidiaries and MPLX. Changes in ownership interest in consolidated subsidiaries that do not result in a change in control are recorded as an equity transaction. As of December 31, 2016, we owned a 25.5 percent interest in MPLX, including a two percent general partner interest. This ownership percentage reflects the conversion of the MPLX Class B Units in July 2017 at 1.09 to 1.00. Due to our 100 percent ownership of the general partner interest, we have determined that we control MPLX and therefore we consolidate MPLX and record a noncontrolling interest for the 74.5 percent interest owned by the public. Investments in entities over which we have significant influence, but not control, are accounted for using the equity method of accounting. This includes entities in which we hold majority ownership but the minority shareholders have substantive participating rights. Income from equity method investments represents our proportionate share of net income generated by the equity method investees. Differences in the basis of the investments and the separate net asset values of the investees, if any, are amortized into net income over the remaining useful lives of the underlying assets and liabilities, except for the excess related to goodwill. Equity method investments are evaluated for impairment whenever changes in the facts and circumstances indicate an other than temporary loss in value has occurred. When the loss is deemed to be other than temporary, the carrying value of the equity method investment is written down to fair value, and the amount of the write-down is included in net income. Use of estimates – The preparation of financial statements in accordance with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities as of the date of the consolidated financial statements and the reported amounts of revenues and expenses during the respective reporting periods. Revenue recognition – Revenues are recognized when products are shipped or services are provided to customers, title is transferred, the sales price is fixed or determinable and collectability is reasonably assured. Costs associated with revenues are recorded in cost of revenues. Shipping and other transportation costs billed to our customers are presented on a gross basis in revenues and cost of revenues. Rebates from vendors are recognized as a reduction of cost of revenues when the initiating transaction occurs. Incentives that are derived from contractual provisions are accrued based on past experience and recognized in cost of revenues. Rebates to customers are reflected as a reduction of revenue and are accrued for in “Accounts payable” on the consolidated balance sheets. Crude oil and refined product exchanges and matching buy/sell transactions – We enter into exchange contracts and matching buy/sell arrangements whereby we agree to deliver a particular quantity and quality of crude oil or refined products at a specified location and date to a particular counterparty and to receive from the same counterparty the same commodity at a specified location on the same or another specified date. The exchange receipts and deliveries are nonmonetary transactions, with the exception of associated grade or location differentials that are settled in cash. The matching buy/sell purchase and sale transactions are settled in cash. Both exchange and matching buy/sell transactions are accounted for as exchanges of inventory and no revenues are recorded. The exchange transactions are recognized at the carrying amount of the inventory transferred. Consumer excise taxes – We are required by various governmental authorities, including countries, states and municipalities, to collect and remit taxes on certain consumer products. Such taxes are presented on a gross basis in revenues and costs and expenses in the consolidated statements of income. Cash and cash equivalents – Cash and cash equivalents include cash on hand and on deposit and investments in highly liquid debt instruments with maturities of three months or less. Restricted cash – Restricted cash consists of cash and investments that must be maintained as collateral for letters of credit issued to certain third party producer customers. The balances will be outstanding until certain capital projects are completed and the third party releases the restriction. Restricted cash also consists of cash advances to be used for the operation and maintenance of an operated pipeline system. At December 31, 2016 and 2015, the amount of restricted cash included in “Other current assets” on the consolidated balance sheets were $5 million and $9 million, respectively, which is currently reflected in our Midstream segment. Accounts receivable and allowance for doubtful accounts – Our receivables primarily consist of customer accounts receivable. Customer receivables are recorded at the invoiced amounts and generally do not bear interest. Allowances for doubtful accounts are generally recorded when it becomes probable the receivable will not be collected and are booked to bad debt expense. The allowance for doubtful accounts is the best estimate of the amount of probable credit losses in customer accounts receivable. We review the allowance quarterly and past-due balances over 180 days are reviewed individually for collectability. Approximately 23 percent and 26 percent of our accounts receivable balances at December 31, 2016 and 2015, respectively, are related to sales of crude oil or refinery feedstocks to customers with whom we have master netting agreements. We have master netting agreements with more than 100 companies engaged in the crude oil or refinery feedstock trading and supply business or the petroleum refining industry. A master netting agreement generally provides for a once per month net cash settlement of the accounts receivable from and the accounts payable to a particular counterparty. Inventories – Inventories are carried at the lower of cost or market value. Cost of inventories is determined primarily under the LIFO method. Costs for crude oil, refinery feedstocks and refined product inventories are aggregated on a consolidated basis for purposes of assessing if the LIFO cost basis of these inventories may have to be written down to market value. Derivative instruments – We use derivatives to economically hedge a portion of our exposure to commodity price risk and, historically, to interest rate risk. We also have limited authority to use selective derivative instruments that assume market risk. All derivative instruments (including derivative instruments embedded in other contracts) are recorded at fair value. Certain commodity derivatives are reflected on the consolidated balance sheets on a net basis by counterparty as they are governed by master netting agreements. Cash flows related to derivatives used to hedge commodity price risk and interest rate risk are classified in operating activities with the underlying transactions. Fair value accounting hedges – We used interest rate swaps to hedge our exposure to interest rate risk associated with fixed interest rate debt in our portfolio. These interest rate swap agreements were terminated in 2012. Changes in the fair values of both the hedged item and the related derivative were recognized immediately in net income with an offsetting effect included in the basis of the hedged item. The net effect was to report in net income the extent to which the accounting hedge was not effective in achieving offsetting changes in fair value. There was a gain on the termination of the agreements, which had been deferred and accounted for as an adjustment to our long-term debt balance. The gain was being amortized over the remaining life of the associated debt as a reduction of our interest expense, until the December 2015 extinguishment of our obligation for the associated debt. At such time, the remaining unamortized gain was credited to net interest and other financial income (costs). Derivatives not designated as accounting hedges –Derivatives that are not designated as accounting hedges may include commodity derivatives used to hedge price risk on (1) inventories, (2) fixed price sales of refined products, (3) the acquisition of foreign-sourced crude oil, (4) the acquisition of ethanol for blending with refined products, (5) the sale of NGLs, (6) the purchase of natural gas and (7) the purchase of electricity. Changes in the fair value of derivatives not designated as accounting hedges are recognized immediately in net income. Concentrations of credit risk – All of our financial instruments, including derivatives, involve elements of credit and market risk. The most significant portion of our credit risk relates to nonperformance by counterparties. The counterparties to our financial instruments consist primarily of major financial institutions and companies within the energy industry. To manage counterparty risk associated with financial instruments, we select and monitor counterparties based on an assessment of their financial strength and on credit ratings, if available. Additionally, we limit the level of exposure with any single counterparty. Property, plant and equipment – Property, plant and equipment are recorded at cost and depreciated on a straight-line basis over the estimated useful lives of the assets, which range from two to 42 years. Such assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. If the sum of the expected undiscounted future cash flows from the use of the asset and its eventual disposition is less than the carrying amount of the asset, an impairment loss is recognized based on the fair value of the asset. When items of property, plant and equipment are sold or otherwise disposed of, any gains or losses are reported in net income. Gains on the disposal of property, plant and equipment are recognized when earned, which is generally at the time of closing. If a loss on disposal is expected, such losses are recognized when the assets are classified as held for sale. Interest expense is capitalized for qualifying assets under construction. Capitalized interest costs are included in property, plant and equipment and are depreciated over the useful life of the related asset. Goodwill and intangible assets – Goodwill represents the excess of the purchase price over the estimated fair value of the net assets acquired in the acquisition of a business. Goodwill is not amortized, but rather is tested for impairment annually and when events or changes in circumstances indicate that the fair value of a reporting unit with goodwill has been reduced below carrying value. The impairment test requires allocating goodwill and other assets and liabilities to reporting units. The fair value of each reporting unit is determined and compared to the carrying value of the reporting unit. If the fair value of the reporting unit is less than the carrying value, including goodwill, the implied fair value of goodwill is calculated. The excess, if any, of the book value over the implied fair value of goodwill is charged to net income as an impairment expense. Amortization of intangibles with definite lives is calculated using the straight-line method which is reflective of the benefit pattern in which the estimated economic benefit is expected to be received over the estimated useful life of the intangible asset. Intangibles subject to amortization are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the intangible may not be recoverable. If the sum of the expected undiscounted future cash flows related to the asset is less than the carrying amount of the asset, an impairment loss is recognized based on the fair value of the asset. Intangibles not subject to amortization are tested for impairment annually and when circumstances indicate that the fair value is less than the carrying amount of the intangible. If the fair value is less than the carrying value, an impairment is recorded for the difference. Major maintenance activities – Costs for planned turnaround, major maintenance and engineered project activities are expensed in the period incurred. These types of costs include contractor repair services, materials and supplies, equipment rentals and our labor costs. Environmental costs – Environmental expenditures are capitalized for additional equipment that mitigates or prevents future contamination or improves environmental safety or efficiency of the existing assets. We recognize remediation costs and penalties when the responsibility to remediate is probable and the amount of associated costs can be reasonably estimated. The timing of remediation accruals coincides with completion of a feasibility study or the commitment to a formal plan of action. Remediation liabilities are accrued based on estimates of known environmental exposure and are discounted when the estimated amounts are reasonably fixed and determinable. If recoveries of remediation costs from third parties are probable, a receivable is recorded and is discounted when the estimated amount is reasonably fixed and determinable. Asset retirement obligations – The fair value of asset retirement obligations is recognized in the period in which the obligations are incurred if a reasonable estimate of fair value can be made. The majority of our recognized asset retirement liability relates to conditional asset retirement obligations for removal and disposal of fire-retardant material from certain refining facilities. The remaining recognized asset retirement liability relates to other refining assets, the removal of underground storage tanks at our leased convenience stores, certain pipelines and processing facilities and other related pipeline assets. The fair values recorded for such obligations are based on the most probable current cost projections. The recorded asset retirement obligations are not material to the consolidated financial statements. Asset retirement obligations have not been recognized for some assets because the fair value cannot be reasonably estimated since the settlement dates of the obligations are indeterminate. Such obligations will be recognized in the period when sufficient information becomes available to estimate a range of potential settlement dates. The asset retirement obligations principally include the hazardous material disposal and removal or dismantlement requirements associated with the closure of certain refining, terminal, retail, pipeline and processing assets. Our practice is to keep our assets in good operating condition through routine repair and maintenance of component parts in the ordinary course of business and by continuing to make improvements based on technological advances. As a result, we believe that generally these assets have no expected settlement date for purposes of estimating asset retirement obligations since the dates or ranges of dates upon which we would retire these assets cannot be reasonably estimated at this time. Income taxes – Deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial statement carrying amounts of assets and liabilities and their tax bases. Deferred tax assets are recorded when it is more likely than not that they will be realized. The realization of deferred tax assets is assessed periodically based on several factors, primarily our expectation to generate sufficient future taxable income. Stock-based compensation arrangements – The fair value of stock options granted to our employees is estimated on the date of grant using the Black-Scholes option pricing model. The model employs various assumptions, based on management’s estimates at the time of grant, which impact the calculation of fair value and ultimately, the amount of expense that is recognized over the vesting period of the stock option award. Of the required assumptions, the expected life of the stock option award and the expected volatility of our stock price have the most significant impact on the fair value calculation. The average expected life is based on our historical employee exercise behavior. The assumption for expected volatility of our stock price reflects a weighting of 50 percent of our common stock implied volatility and 50 percent of our common stock historical volatility. The fair value of restricted stock awards granted to our employees is determined based on the fair market value of our common stock on the date of grant. The fair value of performance unit awards granted to our employees is estimated on the date of grant using a Monte Carlo valuation model. Our stock-based compensation expense is recognized based on management’s estimate of the awards that are expected to vest, using the straight-line attribution method for all service-based awards with a graded vesting feature. If actual forfeiture results are different than expected, adjustments to recognized compensation expense may be required in future periods. Unearned stock-based compensation is charged to equity when restricted stock awards are granted. Compensation expense is recognized over the vesting period and is adjusted if conditions of the restricted stock award are not met. Business combinations - We recognize and measure the assets acquired and liabilities assumed in a business combination based on their estimated fair values at the acquisition date, with any remaining difference versus the purchase consideration recorded as goodwill or gain from a bargain purchase. For all material acquisitions, management engages an independent valuation specialist to assist with the determination of fair value of the assets acquired, liabilities assumed, noncontrolling interest, if any, and goodwill, based on recognized business valuation methodologies. If the initial accounting for the business combination is incomplete by the end of the reporting period in which the acquisition occurs, an estimate will be recorded. Subsequent to the acquisition, and not later than one year from the acquisition date, we will record any material adjustments to the initial estimate based on new information obtained about facts and circumstances that existed as of the acquisition date. An income, market or cost valuation method may be utilized to estimate the fair value of the assets acquired, liabilities assumed, and noncontrolling interest, if any, in a business combination. The income valuation method represents the present value of future cash flows over the life of the asset using: (i) discrete financial forecasts, which rely on management’s estimates of revenue and operating expenses; (ii) long-term growth rates; and (iii) appropriate discount rates. The market valuation method uses prices paid for a reasonably similar asset by other purchasers in the market, with adjustments relating to any differences between the assets. The cost valuation method is based on the replacement cost of a comparable asset at prices at the time of the acquisition reduced for depreciation of the asset. Acquisition-related costs are expensed as incurred in connection with each business combination. Renewable fuel identification numbers – We purchase RINs to satisfy a portion of our RFS2 compliance. We record a short-term intangible asset, included in “Other current assets” on the balance sheet, for RINs owned in excess of our anticipated current period compliance requirements. The asset value is based on the product of the excess RINs as of the balance sheet date, if any, and the average cost of our RINs. We record a current liability, included in “Other current liabilities” on the balance sheet, when we are deficient RINs based on the product of the deficient RINs as of the balance sheet date, if any, and the market price of the RINs at the balance sheet date. The cost of RINs used for compliance is reflected in “Cost of revenues” on the income statement. Any gains or losses on the sale or expiration of RINs are classified as “Other income” on the income statement. Proceeds from RIN sales are included in investing activities - “All other, net” on the cash flow statement. |
Accounting Standards |
12 Months Ended |
|---|---|
Dec. 31, 2016 | |
| New Accounting Pronouncements and Changes in Accounting Principles [Abstract] | |
| Recently Adopted Accounting Pronouncements | Accounting Standards Recently Adopted In September 2015, the FASB issued an accounting standard update that eliminates the requirement to restate prior period financial statements for measurement period adjustments related to business combinations. This accounting standard update requires that the cumulative impact of a measurement period adjustment be recognized in the reporting period in which the adjustment is identified. The change was effective for interim and annual periods beginning after December 15, 2015. We recognized measurement period adjustments during the first and second quarters of 2016 on a cumulative prospective basis as additional analysis was completed on the preliminary purchase price allocation for the acquisition of MarkWest Energy Partners, L.P. (“MarkWest”). See Note 5 for further discussion and detail related to these measurement period adjustments. In May 2015, the FASB issued an accounting standard update that eliminates the requirement to categorize investments that are measured at net asset value using the practical expedient in the fair value hierarchy. The change was effective for fiscal years beginning after December 15, 2015 and interim periods within the fiscal year. Retrospective application is required. Adoption of this accounting standard update in the first quarter of 2016 did not have a material impact on our disclosures. In April 2015, the FASB issued an accounting standard update clarifying whether a customer should account for a cloud computing arrangement as an acquisition of a software license or as a service arrangement by providing characteristics that a cloud computing arrangement must have in order to be accounted for as a software license acquisition. The change was effective for fiscal years and interim periods within those fiscal years beginning after December 15, 2015. Retrospective or prospective application is allowed. We adopted this accounting standard update prospectively in the first quarter of 2016 and it did not have a material impact on our consolidated financial statements. In February 2015, the FASB issued an accounting standard update making targeted changes to the current consolidation guidance. The accounting standard update changes the considerations related to substantive rights, related parties, and decision making fees when applying the VIE consolidation model and eliminates certain guidance for limited partnerships and similar entities under the voting interest consolidation model. The change was effective for fiscal years and interim periods within those fiscal years beginning after December 15, 2015. Under the accounting standard update, we continue to consolidate our master limited partnership, MPLX, but it is now considered to be a VIE. The adoption of this accounting standard update in the first quarter of 2016 did impact our disclosures for this consolidated VIE, but did not have a material impact on our consolidated financial statements. In August 2014, the FASB issued an accounting standard update requiring management to assess an entity’s ability to continue as a going concern and to provide related footnote disclosures in certain circumstances. Management is required to assess if there is substantial doubt about an entity’s ability to continue as a going concern within one year after the issuance of the financial statements. Disclosures are required if conditions give rise to substantial doubt and the type of disclosure is determined based on whether management’s plans will be able to alleviate the substantial doubt. The change was effective for the first fiscal year ending after December 15, 2016, and for fiscal years and interim periods thereafter. The adoption of this accounting standard update in the fourth quarter of 2016 did not have a material impact on our disclosures. In June 2014, the FASB issued an accounting standard update for the elimination of the concept of development stage entity (“DSE”) from U.S. GAAP and removes the related incremental reporting. The accounting standard update eliminated the additional financial statement requirements specific to a DSE and was adopted in the first quarter of 2015. In addition, the portion of the accounting standard update that amended the consolidation model to eliminate the special provisions in the VIE rules for assessing the sufficiency of the equity of a DSE was adopted in the first quarter of 2016. Adoption of this accounting standard update in the first quarters of 2015 and 2016 did not have an impact on our consolidated financial statements. |
| Not Yet Adopted Accounting Pronouncements | Not Yet Adopted In January 2017, the FASB issued an accounting standard 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; 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. In January 2017, the FASB issued an accounting standard update to clarify the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The standard is intended to narrow the definition of a business by specifying the minimum inputs and processes and by narrowing the definition of outputs. The change is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. The guidance will be applied prospectively and early adoption is permitted for certain transactions. We are in the process of determining the impact of the accounting standard update on the consolidated financial statements. In November 2016, the FASB issued an accounting standard update requiring that the statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. The change is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years, with early adoption permitted. Retrospective application is required. The application of this accounting standard update will not have a material impact on our statements of cash flows. In October 2016, the FASB issued an accounting standard update to amend the consolidation guidance issued in February 2015 to require that a decision maker consider, in the determination of the primary beneficiary, its indirect interest in a VIE held by a related party that is under common control on a proportionate basis only. The change is effective for our financial statements for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years, with early adoption permitted. We are required to apply the standard retrospective to January 1, 2016, the date on which we adopted the consolidation guidance issued in February 2015. We have analyzed this accounting standard update and do not expect there to be an impact on our consolidated financial statements. In October 2016, the FASB issued an accounting standard update that requires recognition of the income tax consequences of intra-entity transfers of assets other than inventory when the transfer occurs. The change is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years, with early adoption permitted. The amendments in this accounting standard update should be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. We do not expect application of this accounting standard update to have a material impact on our consolidated financial statements. In August 2016, the FASB issued an accounting standard update related to the classification of certain cash flows. The accounting standard update provides specific guidance on eight cash flow classification issues, including debt prepayment or debt extinguishment costs, contingent consideration payments made after a business combination and distributions received from equity method investees, to reduce diversity in practice. The change is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years, with early adoption permitted. We do not expect application of this accounting standard update to have a material impact on our statements of cash flows. In June 2016, the FASB issued an accounting standard 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. We do not expect application of this accounting standard update to have a material impact on our consolidated financial statements. In March 2016, the FASB issued an accounting standard update to simplify some provisions in stock compensation accounting. The areas for simplification involve the accounting for share-based payment transactions, including income tax consequences, classifications of awards as either equity or liabilities and classification within the statement of cash flows. The changes are effective for fiscal years beginning after December 15, 2016, and interim periods within those years, and early adoption is permitted. Adoption of this accounting standard update in the first quarter of 2017 will not have a material impact on our consolidated financial statements. In March 2016, the FASB issued an accounting standard update eliminating the requirement that an investor retrospectively apply equity method accounting when an investment that it had accounted for by another method initially qualifies for the equity method. This change will be effective for fiscal years beginning after December 15, 2016, and interim periods within those years. The guidance will be applied prospectively and early adoption is permitted. We do not expect application of this accounting standard update to have a material impact on our consolidated financial statements. In February 2016, the FASB issued an accounting standard update requiring lessees to record virtually all leases on their balance sheets. The accounting standard 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. We are currently evaluating 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 lease population and analyzing the practical expedients in order to determine the best path of implementation. We expect to recognize an asset and obligation related to leases previously accounted for as operating leases. In January 2016, the FASB issued an accounting standard update requiring unconsolidated equity investments, not accounted for under the equity method, to be measured at fair value with changes in fair value recognized in net income. The accounting standard update also requires the use of the exit price notion when measuring the fair value of financial instruments for disclosure purposes and the separate presentation of financial assets and liabilities by measurement category and form on the balance sheet and accompanying notes. The accounting standard update eliminates the requirement to disclose the methods and assumptions used in estimating the fair value of financial instruments measured at amortized cost. Lastly, the accounting standard update requires separate presentation in other comprehensive income of the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when electing to measure the liability at fair value in accordance with the fair value option for financial instruments. The changes are effective for fiscal years and interim periods within those fiscal years beginning after December 15, 2017. Early adoption is permitted only for the guidance regarding presentation of a liability’s credit risk. We do not expect application of this accounting standard update to have a material impact on our consolidated financial statements. In May 2014, the FASB issued an accounting standard update for revenue recognition for contracts with customers. The guidance in the accounting standard update states that revenue is recognized when a customer obtains control of a good or service. Recognition of the revenue will involve 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 then recognizing the revenue as the obligations are satisfied. Additional disclosures will be required to provide adequate information to understand the nature, amount, timing and uncertainty of reported revenues and revenues expected to be recognized. The change will be effective on a retrospective or modified retrospective basis for fiscal years beginning after December 15, 2017, and interim periods within those years, with early adoption permitted, no earlier than January 1, 2017. We are currently evaluating the impact of this standard on our financial statements and disclosures, internal controls and accounting policies. This evaluation process is primarily focused on reviewing service contracts and transaction types across our Midstream segment. We are also evaluating the election allowing for net reporting included in the accounting standard update for consumer excise taxes. In addition, we are currently evaluating the methods of adoption. |
MPLX LP |
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| Noncontrolling Interest [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| MPLX LP | MPLX LP MPLX is a diversified, growth-oriented publicly traded master limited partnership initially formed by us to own, operate, develop and acquire midstream assets related to the transportation and storage of hydrocarbon-based products, including crude oil, refined products, natural gas and NGLs. On December 4, 2015, MPLX and MarkWest Energy Partners, L.P. (“MarkWest”) completed a merger, whereby MarkWest became a wholly-owned subsidiary of MPLX (the “MarkWest Merger”). MarkWest’s operations include: natural gas gathering, processing and transportation; and NGL gathering, transportation, fractionation, storage and marketing. MPLX’s other assets include a 100 percent interest in MPLX Pipe Line Holdings LLC (“Pipe Line Holdings”), which owns a network of common carrier crude oil and product pipeline systems and associated storage assets in the Midwest and Gulf Coast regions of the United States and a 100 percent interest in a butane cavern in Neal, West Virginia. MPLX also owns an inland marine business, which is comprised of 18 tow boats and approximately 200 barges which transports crude oil and refined products principally for MPC in the Midwest and Gulf Coast regions of the United States. See Note 5 for information on MPLX’s investment in the Bakken Pipeline system. As of December 31, 2016, we owned a 25.5 percent interest in MPLX, including a two percent general partner interest. This ownership percentage reflects the conversion of the MPLX Class B Units in July 2017 at 1.09 to 1.00. MPLX is a VIE because the limited partners of MPLX do not have substantive kick-out or substantive participating rights over the general partner. We are the primary beneficiary of MPLX because in addition to our significant economic interest, we also have the power, through our 100 percent ownership of the general partner, to control the decisions that most significantly impact MPLX. We therefore consolidate MPLX and record a noncontrolling interest for the 74.5 percent interest owned by the public. The components of our noncontrolling interest consist of equity-based noncontrolling interest and redeemable noncontrolling interest. The redeemable noncontrolling interest relates to MPLX’s preferred units, discussed below. The creditors of MPLX do not have recourse to MPC’s general credit through guarantees or other financial arrangements. The assets of MPLX are the property of MPLX and cannot be used to satisfy the obligations of MPC. Reorganization Transactions On September 1, 2016, MPC, MPLX and various affiliates initiated a series of reorganization transactions in order to simplify MPLX’s ownership structure and its financial and tax reporting. In connection with these transactions, MPC contributed $225 million to MPLX, and all of the issued and outstanding MPLX Class A Units, all of which were held by MarkWest Hydrocarbon L.L.C. (“MarkWest Hydrocarbon”), a subsidiary of MPLX, were exchanged for newly issued common units representing limited partner interests in MPLX. The simple average of the closing prices of MPLX common units for the last 10 trading days prior to September 1, 2016 was used for purposes of these transactions. As a result of these transactions, MPC increased its ownership interest in MPLX by 7 million MPLX common units, or approximately 1 percent. Private Placement of Preferred Units On May 13, 2016, MPLX completed the private placement of approximately 30.8 million 6.5 percent Series A Convertible Preferred Units (the “MPLX Preferred Units”) at a cash price of $32.50 per unit. The aggregate net proceeds of approximately $984 million from the sale of the MPLX Preferred Units was used for capital expenditures, repayment of debt and general partnership purposes. The MPLX Preferred Units rank senior to all MPLX common units with respect to distributions and rights upon liquidation. The holders of the MPLX Preferred Units are entitled to receive quarterly distributions equal to $0.528125 per unit commencing for the quarter ended June 30, 2016, with a prorated amount from the date of issuance. Following the second anniversary of the issuance of the MPLX Preferred Units, the holders of the MPLX Preferred Units will receive as a distribution the greater of $0.528125 per unit or the amount of per unit distributions paid to common unitholders. The MPLX Preferred Units are convertible into MPLX common units on a one for one basis after three years, at the purchasers’ option, and after four years at MPLX’s option, subject to certain conditions. The MPLX Preferred Units are considered redeemable securities due to the existence of redemption provisions upon a deemed liquidation event which is considered outside MPLX’s control. Therefore they are presented as temporary equity in the mezzanine section of the consolidated balance sheets. We have recorded the MPLX Preferred Units at their issuance date fair value, net of issuance costs. Since the MPLX Preferred Units are not currently redeemable and not probable of becoming redeemable in the future, adjustment to the initial carrying amount is not necessary and would only be required if it becomes probable that the security would become redeemable. Dropdowns to MPLX On March 1, 2014, we sold MPLX a 13 percent interest in Pipe Line Holdings for $310 million. MPLX financed this transaction with $40 million of cash on-hand and $270 million of borrowings on its bank revolving credit facility. On December 1, 2014, we sold and contributed interests in Pipe Line Holdings totaling 30.5 percent to MPLX for $600 million in cash and 2.9 million MPLX common units valued at $200 million. MPLX financed the sales portion of this transaction with $600 million of borrowings on its bank revolving credit facility. On December 4, 2015, we sold our remaining 0.5 percent interest in Pipe Line Holdings to MPLX for $12 million. As a result, MPLX now owns 100 percent of Pipe Line Holdings. The sales and contribution of our interests in Pipe Line Holdings to MPLX resulted in a change of our ownership in Pipe Line Holdings, but not a change in control. We accounted for these sales as transactions between entities under common control and did not record a gain or loss. On March 31, 2016, we contributed our inland marine business to MPLX in exchange for 23 million MPLX common units and 460 thousand MPLX general partner units. The number of units we received from MPLX was determined by dividing $600 million by the volume weighted average NYSE price of MPLX common units for the 10 trading days preceding March 14, 2016, pursuant to the Membership Interests Contribution Agreement. We also agreed to waive first-quarter 2016 common unit distributions, IDRs and general partner distributions with respect to the common units issued in this transaction. The contribution of our inland marine business was accounted for as a transaction between entities under common control and therefore, we did not record a gain or loss. On December 5, 2016, our board of directors authorized us to offer up to 100 percent of MPLX Terminals LLC (“MPLX Terminals”), Hardin Street Transportation LLC (“Hardin Street Transportation”) and Woodhaven Cavern LLC (“Woodhaven Cavern”) to MPLX. MPLX Terminals owns and operates terminal and marine facilities. Hardin Street Transportation owns and operates various private crude oil and refined product pipeline systems and associated storage tanks as well as several condensate truck loading and unloading facilities. Woodhaven Cavern owns and operates butane and propane storage caverns. The transaction is expected to close in the first quarter of 2017, pending requisite approvals. Public Offerings On December 8, 2014, MPLX completed a public offering of 3.5 million common units at a price to the public of $66.68 per MPLX common unit, with net proceeds of $221 million. MPLX used the net proceeds from this offering to repay borrowings under its bank revolving credit facility and for general partnership purposes. On February 12, 2015, MPLX completed a public offering of $500 million aggregate principal amount of four percent unsecured senior notes due February 15, 2025. See Note 19 for more information. ATM Program On August 4, 2016, MPLX entered into a Second Amended and Restated Distribution Agreement (the “Distribution Agreement”) providing for the continuous issuance of common units, in amounts, at prices and on terms to be determined by market conditions and other factors at the time of any offerings (such continuous offering program, or at-the-market program, referred to as the “ATM Program”). MPLX expects to use the net proceeds from sales under the ATM Program for general partnership purposes including repayment of debt and funding for acquisitions, working capital requirements and capital expenditures. During 2016, MPLX issued an aggregate of 26 million MPLX common units under the ATM Program, generating net proceeds of approximately $776 million. As of December 31, 2016, $717 million of MPLX common units remains available for issuance through the ATM Program under the Distribution Agreement. Noncontrolling Interest Changes in MPC’s equity resulting from changes in its ownership interest in MPLX were as follows:
Agreements We have various long-term, fee-based transportation and storage services agreements with MPLX. Under these agreements, MPLX provides transportation and storage services to us, and we commit to provide MPLX with minimum quarterly throughput volumes on crude oil and refined products systems and minimum storage volumes of crude oil, refined products and butane. We also have agreements with MPLX which establish fees for operational and management services provided between us and MPLX and for executive management services and certain general and administrative services provided by us to MPLX. These transactions are eliminated in consolidation. |
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Acquisitions and Investments |
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| Business Combinations [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Acquisitions and Investments | Acquisitions and Investments Merger with MarkWest Energy Partners, L.P. On December 4, 2015, MPLX completed the MarkWest Merger. Each common unit of MarkWest issued and outstanding immediately prior to the effective time of the MarkWest Merger was converted into a right to receive 1.09 common units of MPLX representing limited partner interests in MPLX, plus a one-time cash payment of $6.20 per unit. We will contribute approximately $1.28 billion of cash to MPLX to pay the aggregate cash consideration to MarkWest unitholders, without receiving any new equity from MPLX in exchange. At closing, we made a payment of $1.23 billion to MarkWest common unitholders and the remaining $50 million will be paid in equal amounts, the first $25 million was paid in July 2016 and the second $25 million will be paid in July 2017, in connection with the conversion of the MPLX Class B Units to MPLX common units. Our financial results and operating statistics reflect the results of MarkWest from the date of the MarkWest Merger. The components of the fair value of consideration transferred are as follows:
The following table summarizes the final purchase price allocation. Subsequent to December 31, 2015, additional analysis was completed and adjustments were made to the preliminary purchase price allocation as noted in the table below. The estimated fair value of assets acquired and liabilities and noncontrolling interests assumed at the acquisition date, are as follows:
Included in noncurrent assets at December 31, 2015 was a $468 million intangible asset related to customer contracts and relationships. Amortization of intangibles with definite lives was calculated using the straight-line method which was reflective of the benefit pattern in which the estimated economic benefit was expected to be received over the estimated useful life of the intangible asset. The estimated useful life of the customer contracts and relationships is 11 to 25 years. Adjustments to the preliminary purchase price allocations as of December 31, 2015 stem mainly from additional information obtained by management in the first quarter about facts and circumstances that existed at the acquisition date including updates to forecasted employee benefit costs and capital expenditures, and completion of certain valuations to determine the underlying fair value of certain acquired assets. The adjustment to intangibles mainly relates to a misstatement in the preliminary purchase price allocation as of December 31, 2015. The correction of the error resulted in a $68 million reduction to the carrying value of goodwill and offsetting increases of $64 million in intangibles and $2 million in both equity method investments and property, plant and equipment. Management concluded that the correction of the error is immaterial to the consolidated financial statements for all periods presented. The increases to fair value of equity method investments, property plant and equipment, and other noncurrent assets noted above would not have resulted in a material effect to depreciation and amortization or income from equity method investments in the consolidated statements of income for the year ended December 31, 2015, had the fair value adjustments been recorded as of December 4, 2015. The net fair value of the assets acquired and liabilities assumed in connection with the MarkWest Merger was less than the fair value of the total consideration resulting in the recognition of $2.21 billion of goodwill in three reporting units within our Midstream segment, substantially all of which is not deductible for tax purposes. Goodwill represents the complimentary aspects of the highly diverse asset base of MarkWest and MPLX that will provide significant additional opportunities across the hydrocarbon value chain. As further discussed in Note 16, we recorded a goodwill impairment charge based on the implied fair value of goodwill as of the interim impairment analysis in the first quarter of 2016. During the second quarter of 2016, we finalized the analysis of the purchase price allocation. The completion of the purchase price allocation resulted in a refinement of the impairment expense recorded, as more fully discussed in Note 16. We recognized $36 million of transaction costs related to the MarkWest Merger. These costs were expensed and $30 million is included in selling, general and administrative expenses and $6 million is in net interest and other financial income (costs). The amounts of revenue and income from operations associated with the MarkWest Merger included in our consolidated statements of income for 2015 are as follows:
Acquisition of Hess’ Retail Operations and Related Assets On September 30, 2014, we acquired from Hess Corporation (“Hess”) all of Hess’ retail locations, transport operations and shipper history on various pipelines, including approximately 40 mbpd on Colonial Pipeline, for $2.82 billion. We refer to these assets as “Hess’ Retail Operations and Related Assets.” The transaction was funded with a combination of debt and available cash. The transaction provided for an adjustment for working capital, which was finalized with Hess during the first quarter of 2015, resulting in a $3 million reduction to our total consideration. The purchase price allocation resulted in the recognition of $629 million in goodwill by our Speedway segment. The goodwill primarily relates to the expected benefits of a significantly expanded retail platform that should enable growth in new markets, as well as the potential for higher merchandise sales by utilizing Speedway’s marketing approach at the acquired locations. The goodwill is deductible for tax purposes. We recognized $14 million of acquisition-related costs associated with Hess’ Retail Operations and Related Assets acquisition. These costs were expensed and were included in selling, general and administrative expenses. The amounts of revenue and income from operations associated with Hess’ Retail Operations and Related Assets included in our consolidated statements of income for 2014 are as follows:
Unaudited Pro Forma Financial Information The following unaudited pro forma financial information presents consolidated results assuming the MarkWest Merger occurred on January 1, 2014 and the Hess’ Retail Operations and Related Assets acquisition occurred on January 1, 2013.
The unaudited pro forma financial information includes adjustments to align accounting policies, increased depreciation expense to reflect the fair value of property, plant and equipment, increased amortization expense related to identifiable intangible assets, adjustments to amortize the difference between the fair value and the principal amount of the MarkWest debt assumed by MPLX, adjustments to reflect the change in our limited partner interest in MPLX resulting from the MarkWest Merger, additional interest expense related to financing the acquisition of Hess’ Retail Operations and Related Assets, as well as the related income tax effects. The unaudited pro forma financial information does not give effect to potential synergies that could result from the transactions and is not necessarily indicative of the results of future operations. Acquisition of Biodiesel Facility On April 1, 2014, we purchased a facility in Cincinnati, Ohio from Felda Iffco Sdn Bhd, Malaysia for $40 million. The plant currently produces biodiesel, glycerin and other by-products. The production capacity of the plant is approximately 60 million gallons per year. Neither goodwill nor a gain from a bargain purchase was recognized in conjunction with the biodiesel facility acquisition. Assuming the acquisition of the biodiesel facility in 2014 had been made at the beginning of any period presented, the consolidated pro forma results would not be materially different from reported results. Formation of Travel Plaza Joint Venture In the fourth quarter of 2016, Speedway and Pilot Flying J finalized the formation of a joint venture consisting of 123 travel plazas, primarily in the Southeast United States. The new entity, PFJ Southeast LLC (“PFJ Southeast”), consisted of 41 existing locations contributed by Speedway and 82 locations contributed by Pilot Flying J, all of which carry either the Pilot or Flying J brand and are operated by Pilot Flying J. We did not recognize a gain on the $272 million non-cash contribution of stores to the joint venture since the contribution was that of in-substance real estate. Our non-cash contribution consisted of $203 million of property, plant and equipment, $61 million of goodwill and $8 million of inventory. Marine Investments We currently have indirect ownership interests in two ocean vessel joint ventures with Crowley Maritime Corporation (“Crowley”), which were established to own and operate Jones Act vessels in petroleum product service. We have invested a total of $189 million in these two ventures as described further below. In September 2015, we acquired a 50 percent ownership interest in a joint venture, Crowley Ocean Partners, with Crowley. The joint venture owns and operates four new Jones Act product tankers, three of which are leased to MPC. Two of the vessels were delivered in 2015 and the remaining two were delivered in 2016. We contributed a total of $141 million for the four vessels. In May 2016, MPC and Crowley formed a new ocean vessel joint venture, Crowley Coastal Partners LLC (“Crowley Coastal Partners”), in which MPC has a 50 percent ownership interest. MPC and Crowley each contributed their 50 percent ownership in Crowley Ocean Partners, discussed above, into Crowley Coastal Partners. In addition, we contributed $48 million in cash and Crowley contributed its 100 percent ownership interest in Crowley Blue Water Partners LLC (“Crowley Blue Water Partners”) to Crowley Coastal Partners. Crowley Blue Water Partners is an entity that owns and operates three 750 Series ATB vessels that are leased to MPC. We account for our 50 percent interest in Crowley Coastal Partners as part of our Midstream segment using the equity method of accounting. See Note 6 for information on Crowley Coastal Partners as a VIE and Note 25 for information on our conditional guarantee of the indebtedness of Crowley Ocean Partners and Crowley Blue Water Partners. Investments in Pipeline Companies Bakken Pipeline system On February 15, 2017, MPLX closed on the previously announced transaction to acquire a partial, indirect equity interest in the Dakota Access Pipeline (“DAPL”) and Energy Transfer Crude Oil Company Pipeline (“ETCOP”) projects, collectively referred to as the Bakken Pipeline system, through a joint venture with Enbridge Energy Partners L.P. (“Enbridge Energy Partners”). MPLX contributed $500 million of the $2 billion purchase price paid by the joint venture to acquire a 36.75 percent indirect equity interest in the Bakken Pipeline system from Energy Transfer Partners, L.P. (“ETP”) and Sunoco Logistics Partners, L.P. (“SXL”). MPLX holds, through a subsidiary, a 25 percent interest in the joint venture, which equates to an approximate 9.2 percent indirect equity interest in the Bakken Pipeline system. The Bakken Pipeline system is currently expected to deliver in excess of 470 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. Furthermore, MPC expects to become a committed shipper on the Bakken Pipeline system under terms of an on-going open season. In connection with closing the transaction with ETP and SXL, Enbridge Energy Partners canceled MPC’s transportation services agreement with respect to the Sandpiper pipeline project and released MPC from paying any termination fee per that agreement. Explorer Pipeline Company In March 2014, we acquired from Chevron Raven Ridge Pipe Line Company an additional seven percent interest in Explorer Pipeline Company (“Explorer”) for $77 million, bringing our ownership interest to 25 percent. As a result of this increase in our ownership, we now account for our investment in Explorer using the equity method of accounting rather than the cost method. The cumulative impact of the change was applied as an adjustment to 2014 retained earnings. Southern Access Extension pipeline project In July 2014, we exercised our option to acquire a 35 percent ownership interest in Enbridge Inc.’s Southern Access Extension (“SAX”) pipeline through our in investment in Illinois Extension Pipeline Company, LLC (“Illinois Extension Pipeline”). This option resulted from our agreement to be the anchor shipper on the SAX pipeline and our commitment to the Sandpiper pipeline project as discussed below. We have contributed $299 million to Illinois Extension Pipeline since project inception. We account for our ownership interest in Illinois Extension Pipeline as an equity method investment. During the construction of the pipeline, our ownership interest in Illinois Extension Pipeline was considered a VIE. Upon completion and start up of the pipeline in December of 2015, a reassessment determined that our investment is no longer considered a VIE. Our investment in the pipeline and our share of its results are included in our Midstream segment. Sandpiper pipeline project In November 2013, we agreed to serve as an anchor shipper for the Sandpiper pipeline project and fund 37.5 percent of the construction costs of the project, which was to become part of Enbridge Energy Partners’ North Dakota System. In exchange for these commitments, we were to earn an approximate 27 percent equity interest in Enbridge Energy Partners’ North Dakota System upon the Sandpiper pipeline being placed into service. We made contributions of $14 million to North Dakota Pipeline Company LLC (“North Dakota Pipeline”) during 2016 and have contributed $301 million since project inception to fund our share of the construction costs for the project. On September 1, 2016, Enbridge Energy Partners announced that its affiliate, North Dakota Pipeline, would withdraw certain pending regulatory applications for its Sandpiper pipeline project and that the project would be deferred indefinitely. These decisions were considered to indicate an impairment of the costs capitalized to date on the project. See Note 17 for information regarding the charge recognized in the third quarter of 2016. |
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Variable Interest Entities |
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Dec. 31, 2016 | |
| Equity Method Investments and Joint Ventures [Abstract] | |
| Variable Interest Entities | Variable Interest Entities In addition to MPLX, as described in Note 4, the following entities are also VIEs. Crowley Coastal Partners In May 2016, Crowley Coastal Partners was formed to own an interest in both Crowley Ocean Partners and Crowley Blue Water Partners. We have determined that Crowley Coastal Partners is a VIE based on the terms of the existing financing arrangements for Crowley Blue Water Partners and Crowley Ocean Partners and the associated debt guarantees by MPC and Crowley. Our maximum exposure to loss at December 31, 2016 was $489 million, which includes our equity method investment in Crowley Coastal Partners and the debt guarantees provided to each of the lenders to Crowley Blue Water Partners and Crowley Ocean Partners. We are not the primary beneficiary of this VIE because we do not have the power to control the activities that significantly influence the economic outcomes of the entity and therefore, do not consolidate the entity. MarkWest Utica EMG On January 1, 2012, MarkWest Utica Operating Company, LLC (“Utica Operating”), a wholly-owned and consolidated subsidiary of MarkWest, and EMG Utica, LLC ("EMG Utica") (together the "Members"), executed agreements to form a joint venture, MarkWest Utica EMG LLC (“MarkWest Utica EMG”), to develop significant natural gas gathering, processing and NGL fractionation, transportation and marketing infrastructure in eastern Ohio. As of December 31, 2016, MarkWest has a 56 percent legal ownership interest in MarkWest Utica EMG. MarkWest Utica EMG's inability to fund its planned activities without subordinated financial support qualify it as a VIE. Utica Operating is not deemed to be the primary beneficiary due to EMG Utica’s voting rights on significant matters. We account for our ownership interest in MarkWest Utica EMG as an equity method investment. MPLX receives engineering and construction and administrative management fee revenue and reimbursement for other direct personnel costs for operating MarkWest Utica EMG. Our maximum exposure to loss as a result of our involvement with MarkWest Utica EMG includes our equity investment, any additional capital contribution commitments and any operating expenses incurred by the subsidiary operator in excess of compensation received for the performance of the operating services. Our equity investment in MarkWest Utica EMG at December 31, 2016 was $2.22 billion. Ohio Gathering Ohio Gathering Company, L.L.C. (“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 December 31, 2016, we had a 34 percent indirect ownership interest in Ohio Gathering. As this entity is a subsidiary of MarkWest Utica EMG, which is accounted for as an equity method investment, MPLX reports its portion of Ohio Gathering’s net assets as a component of its investment in MarkWest Utica EMG. MPLX receives engineering and construction and administrative management fee revenue and reimbursement for other direct personnel costs for operating Ohio Gathering. |
Related Party Transactions |
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| Related Party Transactions [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Related Party Transactions | Related Party Transactions Our related parties included:
We believe that transactions with related parties were conducted on terms comparable to those with unaffiliated parties. Sales to related parties, which are included in “Sales and other operating revenues (including consumer excise taxes)” on the accompanying consolidated statements of income, were as follows:
Other income from related parties, which is included in “Other income” on the accompanying consolidated statements of income, were as follows:
Other income from related parties consists primarily of fees received for operating transportation assets for our related parties. Purchases from related parties were as follows:
Related party purchases from Crowley Blue Water Partners and Crowley Ocean Partners consist of leasing marine equipment primarily used to transport refined products. Related party purchases from Explorer consist primarily of refined product transportation costs. Related party purchases from Illinois Extension Pipeline, LOCAP, LOOP and other equity method investees consist primarily of crude oil transportation costs. Related party purchases from TAAE, TACE and TAME consist of ethanol purchases. Receivables from related parties, which are included in “Receivables, less allowance for doubtful accounts” on the accompanying consolidated balance sheets, were as follows:
The long-term receivable from related parties, which is included in “Other noncurrent assets” on the accompanying consolidated balance sheet, was $1 million at December 31, 2016 and $1 million at December 31, 2015. Payables to related parties, which are included in “Accounts payable” on the accompanying consolidated balance sheets, were as follows:
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Income per Common Share |
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| Earnings Per Share [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Income per Common Share | Income per Common Share We compute basic earnings per share by dividing net income attributable to MPC by the weighted average number of shares of common stock outstanding. The average number of shares of common stock and per share amounts have been retroactively restated to reflect the two-for-one stock split completed in June 2015. Diluted income per share assumes exercise of certain stock based compensation awards, provided the effect is not anti-dilutive. MPC grants certain incentive compensation awards to employees and non-employee directors that are considered to be participating securities. Due to the presence of participating securities, we have calculated our earnings per share using the two-class method.
The following table summarizes the shares that were anti-dilutive, and therefore, were excluded from the diluted share calculation.
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Equity |
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Dec. 31, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Equity [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Equity | Equity As of December 31, 2016, we have $2.56 billion of remaining share repurchase authorizations from our board of directors. We may utilize various methods to effect the repurchases, which could include open market repurchases, negotiated block transactions, accelerated share repurchases or open market solicitations for shares, some of which may be affected through Rule 10b5-1 plans. The timing and amount of future repurchases, if any, will depend upon several factors, including market and business conditions, and such repurchases may be discontinued at any time. Total share repurchases were as follows for the respective periods:
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Segment Information |
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| Segment Reporting [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Segment Information | Segment Information In the first quarter of 2016, we revised our segment reporting in connection with the contribution of our inland marine business to MPLX. The operating results for our inland marine business and our investment in Crowley Ocean Partners are now reported in our Midstream segment. Previously they were reported as part of our Refining & Marketing segment. Comparable prior period information has been recast to reflect our revised segment presentation. We have three reportable segments: Refining & Marketing; Speedway; and Midstream. Each of these segments is organized and managed based upon the nature of the products and services it offers.
On December 4, 2015, MPLX completed a merger with MarkWest and its results are included in the Midstream segment. On September 30, 2014, we acquired Hess’ Retail Operations and Related Assets, substantially all of which is part of the Speedway segment. Segment information for periods prior to each acquisition does not include amounts for these operations. See Note 5. Segment income represents income from operations attributable to the reportable segments. Corporate administrative expenses and costs related to certain non-operating assets are not allocated to the reportable segments. In addition, certain items that affect comparability (as determined by the chief operating decision maker) are not allocated to the reportable segments.
The following reconciles segment income from operations to income before income taxes as reported in the consolidated statements of income:
The following reconciles segment capital expenditures and investments to total capital expenditures:
The following reconciles total segment customer revenues to sales and other operating revenues (including consumer excise taxes) as reported in the consolidated statements of income:
Revenues by product line were:
No single customer accounted for more than 10 percent of annual revenues for the years ended December 31, 2016, 2015 and 2014. We do not have significant operations in foreign countries. Therefore, revenues in foreign countries and long-lived assets located in foreign countries, including property, plant and equipment and investments, are not material to our operations. Total assets by reportable segment were:
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Other Items |
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| Other Income and Expenses [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other Items | Other Items Net interest and other financial income (costs) was:
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Income Taxes |
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| Income Tax Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Income Taxes | Income Taxes Income tax provisions (benefits) were:
A reconciliation of the federal statutory income tax rate (35 percent) applied to income before income taxes to the provision for income taxes follows:
Deferred tax assets and liabilities resulted from the following:
Net deferred tax liabilities were classified in the consolidated balance sheets as follows:
Tax carryforwards – At December 31, 2016 and 2015, federal operating loss carryforwards were $18 million and $66 million, respectively, which expire in 2022 through 2036. As of December 31, 2016 and 2015, state and local operating loss carryforwards were $8 million and $10 million, respectively, which expire in 2017 through 2036. The decrease in both the federal and state loss carryforwards was due to the utilization of loss carryforwards as a part of the reorganization transactions which simplified the MPLX ownership structure as discussed in Note 4. Valuation allowances – As of December 31, 2016 and 2015, $10 million and $5 million of valuation allowances were recognized primarily due to the expected realizability of foreign tax credits and based on estimates of future financial income and expected realizability of state and local tax operating losses. MPC is continuously undergoing examination of its U.S. federal income tax returns by the Internal Revenue Service. Such audits have been completed through the 2009 tax year. We believe adequate provision has been made for federal income taxes and interest which may become payable for years not yet settled. Further, we are routinely involved in U.S. state income tax audits. We believe all other audits will be resolved with the amounts paid and/or provided for these liabilities. As of December 31, 2016, our income tax returns remain subject to examination in the following major tax jurisdictions for the tax years indicated:
During the first quarter of 2016, MPC’s deferred tax liabilities increased $115 million and additional paid-in capital decreased by the same amount for an out of period adjustment to update the preliminary tax effects recorded in 2015 related to the MarkWest Merger. The impact of the out of period adjustment was not material to the consolidated balance sheet as of December 31, 2015. The following table summarizes the activity in unrecognized tax benefits:
If the unrecognized tax benefits as of December 31, 2016 were recognized, $2 million would affect our effective income tax rate. There were $1 million of uncertain tax positions as of December 31, 2016 for which it is reasonably possible that the amount of unrecognized tax benefits would significantly decrease during the next twelve months. Interest and penalties related to income taxes are recorded as part of the provision for income taxes. Such interest and penalties were net expenses (benefits) of $(5) million, $3 million and less than $1 million in 2016, 2015 and 2014, respectively. As of December 31, 2016 and 2015, $13 million and $18 million of interest and penalties were accrued related to income taxes. |
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Inventories |
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| Inventory Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Inventories | Inventories
The LIFO method accounted for 91 percent of total inventory value at both December 31, 2016 and 2015. Inventories are carried at the lower of cost or market value. Costs of crude oil, refinery feedstocks and refined products are aggregated on a consolidated basis for purposes of assessing if the LIFO cost basis of these inventories may have to be written down to market values. As of December 31, 2015, costs of inventories exceeded market value by $370 million resulting in a charge to cost of revenues to establish an LCM inventory valuation reserve. During 2016, market prices for these inventories increased and the market value of these inventories exceeded their cost basis resulting in a reversal of the LCM inventory reserve and a $370 million benefit to cost of revenues. At December 31, 2016, current acquisition costs of inventories were estimated to exceed the LIFO inventory value by $308 million. There were no material liquidations of LIFO inventories in 2016. In the second quarter of 2016, we had recognized the effects of an interim liquidation of our refined products inventories which we did not expect to reinstate by year end resulting in a pre-tax charge of approximately $54 million to income. Due to the annual build of refined products inventories, in the fourth quarter of 2016, we recognized the effects of annual builds in our refined products and crude inventories which had the effect of reversing the second quarter charge. During 2015, we recorded LIFO liquidations caused by permanently decreased levels in crude oil and refined products inventory levels. Cost of revenues increased and income from operations decreased by $78 million for the year ended December 31, 2015 due to these LIFO liquidations. There were no liquidations of LIFO inventories in 2014. |
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Equity Method Investments |
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| Equity Method Investments and Joint Ventures [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Equity Method Investments | Equity Method Investments
Summarized financial information for equity method investees is as follows:
As of December 31, 2016, the carrying value of our equity method investments was $1.21 billion higher than the underlying net assets of investees. This basis difference is being amortized or accreted into net income over the remaining estimated useful lives of the underlying net assets, except for $553 million of excess related to goodwill. Centennial experienced a significant reduction in shipment volumes in the second half of 2011 that has continued through 2016. At December 31, 2016, Centennial was not shipping product. As a result, we continued to evaluate the carrying value of our equity investment in Centennial. We concluded that no impairment was required given our assessment of its fair value based on market participant assumptions for various potential uses and future cash flows of Centennial’s assets. If market conditions were to change and the owners of Centennial are unable to find an alternative use for the assets, there could be a future impairment of our Centennial interest. As of December 31, 2016, our equity investment in Centennial was $35 million and we had a $29 million guarantee associated with 50 percent of Centennial’s outstanding debt. See Note 25 for additional information on the debt guarantee. Dividends and partnership distributions received from equity method investees (excluding distributions that represented a return of capital previously contributed) were $291 million, $113 million and $170 million in 2016, 2015 and 2014. |
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Property, Plant and Equipment |
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| Property, Plant and Equipment [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Property, Plant and Equipment | Property, Plant and Equipment
Property, plant and equipment includes gross assets acquired under capital leases of $505 million and $511 million at December 31, 2016 and 2015, respectively, with related amounts in accumulated depreciation of $202 million and $176 million at December 31, 2016 and 2015. Property, plant and equipment includes construction in progress of $2.02 billion and $2.26 billion at December 31, 2016 and 2015, respectively, which primarily relates to capital projects at our refineries and midstream facilities. In the third quarter of 2015, we decided to cancel the ROUX project at our Garyville, Louisiana refinery due to the implications of current market conditions. The project was intended to increase margins by upgrading residual fuel to ultra-low sulfur diesel and gas oil. As a result, we recorded a $144 million impairment charge to write off the costs incurred through September 30, 2015 on the project. This impairment charge is included in “Impairment expense” on the accompanying consolidated statements of income. |
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Goodwill and Intangibles |
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| Goodwill and Intangible Assets Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Goodwill | Goodwill and Intangibles Goodwill Goodwill is tested for impairment on an annual basis and when events or changes in circumstances indicate the fair value of a reporting unit with goodwill has been reduced below the carrying value of the net assets of the reporting unit. In 2016, we recorded an impairment of goodwill as outlined below based on an interim impairment analysis. There was no impairment required based on our subsequent annual test of goodwill in 2016. In 2015, no impairment was required based on our annual test. During the first quarter of 2016, MPLX, our consolidated subsidiary, determined that an interim impairment analysis of the goodwill recorded in connection with the MarkWest Merger was necessary based on consideration of a number of first quarter events and circumstances, including i) continued deterioration of near-term commodity prices as well as longer term pricing trends, ii) recent guidance on reductions to forecasted capital spending, the slowing of drilling activity and the resulting reduced production growth forecasts released or communicated by MPLX’s producer customers and iii) increases in the cost of capital. The combination of these factors was considered to be a triggering event requiring an interim impairment test. Based on the first step of the interim goodwill impairment analysis, the fair value for three of the reporting units to which goodwill was assigned in connection with the MarkWest Merger was less than their respective carrying value. In step two of the impairment analysis, the implied fair values of the goodwill were compared to the carrying values within those reporting units. Based on this assessment, it was determined that goodwill was impaired in two of the reporting units. Accordingly, MPLX recorded an impairment charge of approximately $129 million in the first quarter of 2016. In the second quarter of 2016, MPLX completed its purchase price allocation, which resulted in an additional $1 million of impairment expense that would have been recorded in the first quarter of 2016 had the purchase price allocation been completed as of that date. This adjustment to the impairment expense was the result of completing an evaluation of the deferred tax liabilities associated with the MarkWest Merger and their impact on the resulting goodwill that was recognized. The fair value of the reporting units for the interim goodwill impairment analysis was determined based on applying the discounted cash flow method, which is an income approach, and the guideline public company method, which is a market approach. The discounted cash flow fair value estimate was based on known or knowable information at the interim measurement date. The significant assumptions that were used to develop the estimates of the fair values under the discounted cash flow method include management’s best estimates of the expected future results and discount rates, which ranged from 10.5 percent to 11.5 percent. Fair value determinations require considerable judgment and are sensitive to changes in underlying assumptions and factors. As a result, there can be no assurance that the estimates and assumptions made for purposes of the interim goodwill impairment test will prove to be an accurate prediction of the future. The changes in the carrying amount of goodwill for 2016 and 2015 were as follows:
Intangible Assets Our intangible assets as of December 31, 2016 and 2015 are as follows:
Amortization expense for 2016 and 2015 was $50 million and $29 million, respectively. Estimated future amortization expense related to the intangible assets at December 31, 2016 is as follows:
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Fair Value Measurements |
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| Fair Value Disclosures [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair Value Measurements | Fair Value Measurements Fair Values – Recurring The following tables present assets and liabilities accounted for at fair value on a recurring basis as of December 31, 2016 and 2015 by fair value hierarchy level. We have elected to offset the fair value amounts recognized for multiple derivative contracts executed with the same counterparty, including any related cash collateral as shown below; however, fair value amounts by hierarchy level are presented on a gross basis in the following tables.
Commodity derivatives in Level 1 are exchange-traded contracts for crude oil and refined products measured at fair value with a market approach using the close-of-day settlement prices for the market. Commodity derivatives are covered under master netting agreements with an unconditional right to offset. Collateral deposits in futures commission merchant accounts covered by master netting agreements related to Level 1 commodity derivatives are classified as Level 1 in the fair value hierarchy. Commodity derivatives in Level 2 include crude oil and natural gas swap contracts and are measured at fair value with a market approach. The valuations are based on the appropriate commodity prices and contain no significant unobservable inputs. LIBO Rates are an observable input for the measurement of these derivative contracts. The measurements for commodity contracts contain observable inputs in the form of forward prices based on WTI crude oil prices; and Columbia Appalachia, Henry Hub, PEPL and Houston Ship Channel natural gas prices. Level 3 instruments include OTC NGL contracts 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 at December 31, 2016 used significant unobservable inputs including: (1) NGL prices interpolated and extrapolated due to inactive markets ranging from $0.28 to $1.27 per gallon and (2) the probability of renewal of 50 percent for the first five-year term and 75 percent for the second five-year term of the gas purchase agreement and the related keep-whole processing agreement. For these 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 the derivative liabilities. The forward prices for the individual NGL products generally increase or decrease in a positive correlation with one another. Increases or decreases in forward NGL prices result in an increase or decrease in the fair value of the embedded derivative. An increase in the probability of renewal would result in an increase in the fair value of the related embedded derivative liability. The contingent consideration represents the fair value as of December 31, 2016 and 2015 of the remaining amount we expect to pay to BP related to the earnout provision associated with our 2013 acquisition of BP’s refinery in Texas City, Texas and related logistics and marketing assets. We refer to these assets as the “Galveston Bay Refinery and Related Assets”. The fair value of the remaining contingent consideration was estimated using an income approach and is therefore a Level 3 liability. The amount of cash to be paid under the arrangement is based on both a market-based crack spread and refinery throughput volumes for the months during which the earnout applies, as well as established thresholds that cap the annual and total payment. The earnout payment cannot exceed $250 million per year for the last three years of the arrangement, with the total cumulative payment capped at $700 million over the six-year period commencing in 2014. Any excess or shortfall from the annual cap for a current year’s earnout calculation will not affect subsequent years’ calculations. The fair value calculation used significant unobservable inputs including: (1) an estimate of forecasted monthly refinery throughput volumes; (2) an internal and external monthly crack spread forecast of approximately $13 per barrel; and (3) a range of risk-adjusted discount rates from five percent to 10 percent. An increase or decrease in forecasts for the crack spread or refinery throughput volumes may result in a corresponding increase or decrease in the fair value of the contingent consideration liability. Increases to the fair value as a result of increasing forecasts for both of these unobservable inputs, however, are limited as the earnout payment is subject to annual caps. An increase or decrease in the discount rate may result in a decrease or increase to the fair value of the contingent consideration liability, respectively. The fair value of the contingent consideration liability is reassessed each quarter, with changes in fair value recorded in cost of revenues. Through December 31, 2016, we have paid BP approximately $569 million in total leaving $131 million remaining under the total cap of $700 million. The following 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.
See Note 18 for the income statement impacts of our derivative instruments. Fair Values – Nonrecurring The following table shows the values of assets, by major category, measured at fair value on a nonrecurring basis in periods subsequent to their initial recognition.
During the third quarter of 2016, Enbridge Energy Partners announced that its affiliate, North Dakota Pipeline, would withdraw certain pending regulatory applications for the Sandpiper pipeline project and that the project would be deferred indefinitely. These decisions were considered to indicate an impairment of the costs capitalized to date on the project. As the operator of North Dakota Pipeline and the entity responsible for maintaining its financial records, Enbridge completed a fixed asset impairment analysis as of August 31, 2016, in accordance with ASC Topic 360. Based on the estimated liquidation value of the fixed assets, an impairment charge was recorded by North Dakota Pipeline. Based on our 37.5 percent ownership of North Dakota Pipeline, we recognized approximately $267 million of this charge in the third quarter of 2016 through “Income (loss) from equity method investments” on the accompanying consolidated statements of income, which impaired virtually all of our $301 million investment in the project. Also, in accordance with ASC Topic 323, we completed an assessment to determine any additional equity method impairment charge to be recorded on our consolidated financial statements resulting from an other-than-temporary impairment. The result of this analysis indicated no additional charge was required to be recorded. The fixed assets of North Dakota Pipeline related to the Sandpiper pipeline project consist primarily of project management and engineering costs, pipe, valves, motors and other equipment, land and easements. The fair value of fixed assets was estimated based on a market approach using the estimated price that would be received to sell pipe, land and other related equipment in its current condition, considering the current market conditions for sale of these assets and length of disposal period. The valuation considered a range of potential selling prices from various alternatives that could be used to dispose of these assets. As such, the fair value of the North Dakota Pipeline equity method investment and its underlying assets represents a Level 3 measurement. As a result, actual results may differ from the estimates and assumptions made for purposes of this impairment analysis. North Dakota Pipeline expects to dispose of these assets through orderly transactions. During the second quarter of 2016, forecasts for Ohio Condensate, an equity method investment, were reduced in line with updated forecasts for customer requirements. As the operator of that entity responsible for maintaining its financial records, we completed a fixed asset impairment analysis as of June 30, 2016, in accordance with ASC Topic 360, to determine the potential fixed asset impairment charge. The resulting fixed asset impairment charge recorded within Ohio Condensate’s financial statements was $96 million. Based on our 60 percent ownership of Ohio Condensate, approximately $58 million was recorded in the second quarter of 2016 in “Income (loss) from equity method investments” on the accompanying consolidated statements of income. Our investment in Ohio Condensate, which was established at fair value in connection with the MarkWest Merger, exceeded its proportionate share of the underlying net assets. Therefore, in conjunction with the ASC Topic 360 impairment analysis, we completed an equity method impairment analysis in accordance with ASC Topic 323 to determine the potential additional equity method impairment charge to be recorded on our consolidated financial statements resulting from an other-than-temporary impairment. As a result, an additional impairment charge of approximately $31 million was recorded in the second quarter of 2016 in “Income (loss) from equity method investments” on the accompanying consolidated statements of income, which eliminated the basis differential established in connection with the MarkWest Merger. The fair value of Ohio Condensate and its underlying assets was determined based upon applying the discounted cash flow method, which is an income approach, and the guideline public company method, which is a market approach. The discounted cash flow fair value estimate is based on known or knowable information at the interim measurement date. The significant assumptions that were used to develop the estimate of the fair value under the discounted cash flow method include management’s best estimates of the expected future results using a probability weighted average set of cash flow forecasts and a discount rate of 11.2 percent. Fair value determinations require considerable judgment and are sensitive to changes in underlying assumptions and factors. As such, the fair value of the Ohio Condensate equity method investment and its underlying assets represents a Level 3 measurement. As a result, actual results may differ from the estimates and assumptions made for purposes of this impairment analysis. See Note 16 for additional information on the goodwill impairment. In the third quarter of 2015, we decided to cancel the ROUX project at our Garyville refinery. The work completed on the project through September 30, 2015 had no alternate use or net salvage value; therefore, we fully impaired the $144 million of cost capitalized for the project through that date. The fair value of our investment in the project was determined using an income approach and is classified as Level 3. Based on the financial and operational status of a company in which we have an interest, we fully impaired our $11 million investment in that company in 2014. Our investment in this company was accounted for using the cost method and was included in our Refining & Marketing segment. The impairment charge is included in “Other income” on the accompanying consolidated statements of income. The fair value of our investment in this cost company was measured using an income approach. This measurement is classified as Level 3. Fair Values – Reported The following table summarizes financial instruments on the basis of their nature, characteristics and risk at December 31, 2016 and 2015, excluding the derivative financial instruments and contingent consideration reported above.
Our current assets and liabilities include financial instruments, the most significant of which are trade accounts receivable and payables. We believe the carrying values of our current assets and liabilities approximate fair value. Our fair value assessment incorporates a variety of considerations, including (1) the short-term duration of the instruments, (2) our investment-grade credit rating and (3) our historical incurrence of and expected future insignificance of bad debt expense, which includes an evaluation of counterparty credit risk. Fair values of our financial assets included in investments and other financial assets and of our financial liabilities included in deferred credits and other liabilities are measured primarily using an income approach and most inputs are internally generated, which results in a Level 3 classification. Estimated future cash flows are discounted using a rate deemed appropriate to obtain the fair value. Other financial assets primarily consist of environmental remediation receivables. Deferred credits and other liabilities primarily consist of a liability resulting from a financing arrangement for the construction of the steam methane reformer (“SMR”) at the Javelina gas processing and fractionation complex in Corpus Christi, Texas, insurance liabilities and environmental remediation liabilities. Fair value of fixed-rate long-term debt is measured using a market approach, based upon the average of quotes for our debt from major financial institutions and a third-party valuation service. Because these quotes cannot be independently verified to the market, they are considered Level 3 inputs. Fair value of variable-rate long-term debt approximates the carrying value. |
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Derivatives |
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| Summary of Derivative Instruments [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Derivatives | Derivatives For further information regarding the fair value measurement of derivative instruments, including any effect of master netting agreements or collateral, see Note 17. See Note 2 for a discussion of the types of derivatives we use and the reasons for them. We do not designate any of our commodity derivative instruments as hedges for accounting purposes. Our interest rate derivative instruments that were terminated in 2012 had been designated as fair value accounting hedges. The following table presents the gross fair values of derivative instruments, excluding cash collateral, and where they appear on the consolidated balance sheets as of December 31, 2016 and 2015:
Derivatives not Designated as Accounting Hedges Derivatives that are not designated as accounting hedges may include commodity derivatives used to hedge price risk on (1) inventories, (2) fixed price sales of refined products, (3) the acquisition of foreign-sourced crude oil, (4) the acquisition of ethanol for blending with refined products, (5) sale of NGLs, (6) the purchase of natural gas and (7) purchase of electricity. The table below summarizes open commodity derivative contracts for crude oil and refined products as of December 31, 2016.
The following table summarizes the effect of all commodity derivative instruments in our consolidated statements of income:
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Debt |
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| Debt Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Debt | Debt Our outstanding borrowings at December 31, 2016 and 2015 consisted of the following:
The following table shows five years of scheduled debt payments.
Commercial Paper On February 26, 2016, we established a commercial paper program that allows us to have a maximum of $2 billion in commercial paper outstanding, with maturities up to 397 days from the date of issuance. We do not intend to have outstanding commercial paper borrowings in excess of available capacity under our bank revolving credit facilities. During 2016, we borrowed and repaid $1.26 billion under the commercial paper program. At December 31, 2016, we had no amounts outstanding under the commercial paper program. MPC Bank Revolving Credit Facilities On July 20, 2016, we entered into a credit agreement with a syndicate of lenders to replace our existing MPC bank revolving credit facility due in 2017. The new agreement provides for a four-year $2.5 billion bank revolving credit facility (our “four-year revolving credit facility”) maturing on July 20, 2020. Additionally, we entered into a 364-day $1 billion bank revolving credit facility (our “364-day revolving credit facility” and together with our four-year revolving credit facility, our “revolving credit facilities”) maturing on July 19, 2017. Our four-year revolving credit facility includes letter of credit issuing capacity of up to $2.0 billion and swingline loan capacity of up to $100 million. We may increase our borrowing capacity under our four-year revolving credit facility by up to an additional $500 million, subject to certain conditions including the consent of the lenders whose commitments would be increased. In addition, the maturity date of the four-year revolving credit facility may be extended for up to two additional one-year periods subject to the approval of lenders holding a majority of the commitments then outstanding, provided that the commitments of any non-consenting lenders will terminate on the then-effective maturity date. Borrowings under our revolving credit facilities bear interest, at our election, at either the Adjusted LIBO Rate (as defined in our revolving credit facilities) plus a margin or the Alternate Base Rate (as defined in our revolving credit facilities), plus a margin. We are charged various fees and expenses under our revolving credit facilities, including administrative agent fees, commitment fees on the unused portion of our borrowing capacity and fees related to issued and outstanding letters of credit. The applicable margin to the benchmark interest rates and the margin to the benchmark commitment fees payable under our revolving credit facilities fluctuate from time-to-time based on our credit ratings. Our revolving credit facilities contain certain representations and warranties, affirmative and restrictive covenants and events of default that we consider to be usual and customary for arrangements of this type, including a financial covenant that requires us to maintain a ratio of Consolidated Net Debt to Total Capitalization (each as defined in our revolving credit facility) of no greater than 0.65 to 1.00 as of the last day of each fiscal quarter. Other covenants, among other things, restrict our ability to incur debt, create liens on our assets or enter into transactions with affiliates. As of December 31, 2016, we were in compliance with the covenants contained in the revolving credit facilities. There were no borrowings or letters of credit outstanding at December 31, 2016. Trade Receivables Securitization Facility On July 20, 2016, we amended our trade receivables securitization facility (“trade receivables facility”) to, among other things, reduce the capacity from $1 billion to $750 million and to extend the maturity date to July 19, 2019. The reduction in capacity reflects the lower refined product price environment. The trade receivables facility consists of one of our wholly-owned subsidiaries, Marathon Petroleum Company LP (“MPC LP”), selling or contributing on an on-going basis all of its trade receivables (including trade receivables acquired from Marathon Petroleum Trading Canada LLC, a wholly-owned subsidiary of MPC LP), together with all related security and interests in the proceeds thereof, without recourse, to another wholly-owned, bankruptcy-remote special purpose subsidiary, MPC Trade Receivables Company LLC (“TRC”), in exchange for a combination of cash, equity and/or a subordinated note issued by TRC to MPC LP. TRC, in turn, has the ability to finance its purchase of the receivables from MPC LP by selling undivided ownership interests in qualifying trade receivables, together with all related security and interests in the proceeds thereof, without recourse, to the purchasing group in exchange for cash proceeds. The trade receivables facility also provides for the issuance of letters of credit up to $750 million, provided that the aggregate credit exposure of the purchasing group, including outstanding letters of credit, may not exceed the lesser of $750 million or the balance of our eligible trade receivables at any one time. To the extent that TRC retains an ownership interest in the receivables it has purchased or received from MPC LP, such interest will be included in our consolidated financial statements solely as a result of the consolidation of the financial statements of TRC with those of MPC. The receivables sold or contributed to TRC are available first and foremost to satisfy claims of the creditors of TRC and are not available to satisfy the claims of creditors of MPC. TRC has granted a security interest in all of its assets to the purchasing group to secure its obligations under the Receivables Purchase Agreement. Proceeds from the sale of undivided percentage ownership interests in qualifying receivables under the trade receivables facility will be reflected as debt on our consolidated balance sheet. We will remain responsible for servicing the receivables sold to the purchasing group. TRC pays floating-rate interest charges and usage fees on amounts outstanding under the trade receivables facility, if any, and certain other fees related to the administration of the facility and letters of credit that are issued and outstanding under the trade receivables facility. The Receivables Purchase Agreement and Second Amended and Restated Receivables Sale Agreement include representations and covenants that we consider usual and customary for arrangements of this type. Trade receivables are subject to customary criteria, limits and reserves before being deemed to qualify for sale by TRC pursuant to the trade receivables facility. In addition, further purchases of qualified trade receivables under the trade receivables facility are subject to termination, and TRC may be subject to default fees, upon the occurrence of certain amortization events that are included in the Receivables Purchase Agreement, all of which we consider to be usual and customary for arrangements of this type. At December 31, 2016, we were in compliance with the covenants contained in the Receivables Purchase Agreement and Second Amended and Restated Receivables Sale Agreement. During 2016, we borrowed $430 million under the trade receivables securitization facility at an average interest rate of 1.4 percent and repaid all of these borrowings. There were no borrowings or letters of credit outstanding under the trade receivables facility at December 31, 2016. As of December 31, 2016, eligible trade receivables supported borrowings and letter of credit issuances of $684 million. MPC Term Loan Agreement On August 26, 2014, we entered into a $700 million five-year senior unsecured term loan credit agreement (“term loan agreement”) with a syndicate of lenders to fund a portion of the purchase price for the acquisition of Hess’ Retail Operations and Related Assets. The term loan was drawn in full on September 24, 2014. The term loan agreement matures on September 24, 2019 and may be prepaid at any time without premium or penalty. We pay certain customary fees under the term loan agreement, including an annual administrative fee to the administrative agent. On September 30, 2016, we prepaid $500 million under the MPC term loan agreement with available cash on hand. As of December 31, 2016, $200 million in borrowings was outstanding under the term loan agreement. Borrowings under the term loan agreement bear interest, at our election, at either the Adjusted LIBO Rate (as defined in the term loan agreement) plus a margin or the Alternate Base Rate (as defined in the term loan agreement) plus a margin. The applicable margin to the benchmark interest rates fluctuate from time-to-time based on our credit ratings. The borrowings under this facility during 2016 were at an average interest rate of 1.6 percent. The term loan agreement contains representation and warranties, affirmative and negative covenants and events of default that are substantially similar to those contained in our revolving credit facilities, which we consider to be usual and customary for an agreement of this type. Among other things, our term loan agreement requires us to maintain, as of the last day of each fiscal quarter, a ratio of Consolidated Net Debt to Total Capitalization (as defined in the term loan agreement) of no greater than 0.65 to 1.00. As of December 31, 2016, we were in compliance with the covenants contained in the term loan agreement. MPC Senior Notes On December 14, 2015, we completed a public offering of $1.5 billion in aggregate principal amount of unsecured senior notes (the “new MPC senior notes”), consisting of $600 million aggregate principal amount of 2.700% senior notes due 2018, $650 million aggregate principal amount of 3.400% senior notes due 2020 and $250 million aggregate principal amount of 5.850% senior notes due 2045. The net proceeds from the offering of the new MPC senior notes were $1.49 billion, after deducting underwriting discounts and offering expenses. We used a majority of the net proceeds from this offering to extinguish the $750 million aggregate principal amount of our 3.500% senior notes due 2016. During December 2015, we deposited $763 million with our senior notes trustee in full satisfaction of our obligations for the 3.500% senior notes due 2016. Under the terms of the senior notes indenture governing the 3.500% senior notes due 2016, our obligations related to these notes, including the payment of principal and interest to the maturity date, was discharged in full upon making such deposit. As a result, we recorded a loss on extinguishment of debt of $5 million. We used the remaining net proceeds from the new MPC senior notes for general corporate purposes. Interest on each series of the new MPC senior notes is payable semi-annually in arrears on June 15 and December 15, commencing on June 15, 2016. The new MPC senior notes are unsecured and unsubordinated obligations of MPC and rank equally with its other existing and future unsecured and unsubordinated indebtedness. The new MPC senior notes are structurally subordinate to the secured and unsecured debt of MPC’s subsidiaries, including all debt of MPLX and its subsidiaries. MPLX Credit Agreement MPLX is party to a credit agreement, dated as of November 20, 2014, and amended as of October 27, 2015 (“MPLX credit agreement”), providing for a $2 billion bank revolving credit facility with a maturity date of December 4, 2020 and an outstanding $250 million term loan facility with a maturity date of November 20, 2019. The MPLX credit agreement includes letter of credit issuing capacity of up to $250 million and swingline loan capacity of up to $100 million. The revolving borrowing capacity under the MPLX credit agreement may be increased by up to an additional $500 million, subject to certain conditions, including the consent of the lenders whose commitments would increase. In addition, the maturity date of the bank revolving credit facility may be extended from time-to-time during its term to a date that is one year after the then-effective maturity date, subject to the approval of lenders holding the majority of the loans and commitments then outstanding, provided that the commitments of any non-consenting lenders will be terminated on the then-effective maturity date. The maturity date for the term loan facility may be extended for up to two additional one-year periods subject to the consent of the lenders holding a majority of the outstanding term loan borrowings, provided that the portion of the term loan borrowings held by any non-consenting lenders will continue to be due and payable on the then-effective maturity date. Borrowings under the MPLX credit agreement bear interest, at our election, at the Adjusted LIBO Rate or the Alternate Base Rate (as defined in the MPLX credit agreement) plus a specified margin. MPLX is charged various fees and expenses in connection with the agreement, including administrative agent fees, commitment fees on the unused portion of the borrowing capacity and fees with respect to issued and outstanding letters of credit. The applicable margins to the benchmark interest rates and the commitment fees payable under the MPLX credit agreement fluctuate from time-to-time based on MPLX’s credit ratings. The MPLX credit agreement includes certain representations and warranties, affirmative and restrictive covenants and events of default that we consider to be usual and customary for an agreement of this type, including a financial covenant that requires MPLX to maintain a ratio of Consolidated Total Debt as of the end of each fiscal quarter to Consolidated EBITDA (both as defined in the MPLX credit agreement) for the prior four fiscal quarters of no greater than 5.0 to 1.0 (or 5.5 to 1.0 for up to two fiscal quarters following certain acquisitions). Consolidated EBITDA is subject to adjustments for certain acquisitions completed and capital projects undertaken during the relevant period. Other covenants, among other things, restrict MPLX and certain of its subsidiaries from incurring debt, creating liens on its assets and entering into transactions with affiliates. As of December 31, 2016, MPLX was in compliance with the covenants contained in the MPLX credit agreement. In connection with the closing of the MarkWest Merger, MarkWest’s existing credit facility was terminated and the approximately $943 million outstanding under MarkWest’s bank revolving credit facility was repaid with $850 million of borrowings under MPLX’s bank revolving credit facility and $93 million in cash. During 2016, MPLX borrowed $434 million under the bank revolving credit facility, at an average interest rate of 1.9 percent, per annum, and repaid $1.31 billion of these borrowings. At December 31, 2016, MPLX had no outstanding borrowings and $3 million of letters of credit outstanding under the bank revolving credit facility, resulting in total unused loan availability of $2 billion. At December 31, 2016, MPLX had $250 million in borrowings outstanding under the term loan facility that bore interest at an average rate of 2.0 percent during 2016. MPLX and MarkWest Senior Notes In connection with the MarkWest Merger, MPLX assumed MarkWest’s outstanding debt, which included $4.1 billion aggregate principal amount of senior notes outstanding. On December 22, 2015, approximately $4.04 billion aggregate principal amount of MarkWest’s outstanding senior notes were exchanged for an aggregate principal amount of approximately $4.04 billion of new unsecured senior notes issued by MPLX and cash of $1 for each $1,000 of principal amount exchanged in an exchange offer and consent solicitation undertaken by MPLX and MarkWest. The new MPLX senior notes consist of approximately $710 million aggregate principal amount of 5.500% senior notes due February 15, 2023, approximately $989 million aggregate principal amount of 4.500% senior notes due July 15, 2023, approximately $1.15 billion aggregate principal amount of 4.875% senior notes due December 1, 2024 and approximately $1.19 billion aggregate principal amount of 4.875% senior notes due June 1, 2025. Interest on each series of new MPLX senior notes is payable semi-annually in arrears on February 15th and August 15th of each year with respect to the 5.500% 2023 senior notes, on January 15th and July 15th of each year with respect to the 4.500% 2023 senior notes and on June 1st and December 1st of each year with respect to the 4.875% 2024 senior notes and the 4.875% 2025 senior notes. After giving effect to the exchange offer and consent solicitation referred to above, as of December 31, 2016, MarkWest had outstanding approximately $40 million aggregate principal amount of 5.500% senior notes due February 15, 2023, approximately $11 million aggregate principal amount of 4.500% senior notes due July 15, 2023, approximately $1 million aggregate principal amount of 4.875% senior notes due December 1, 2024 and approximately $11 million aggregate principal amount of 4.875% senior notes due June 1, 2025. Interest on each series of the MarkWest senior notes is payable semi-annually in arrears on February 15th and August 15th of each year with respect to the 5.500% 2023 senior notes, on January 15th and July 15th of each year with respect to the 4.500% 2023 senior notes and on June 1st and December 1st of each year with respect to the 4.875% 2024 senior notes and the 4.875% 2025 senior notes. The new MPLX notes are unsecured senior obligations of MPLX and rank equally in right of payment with all of its other senior unsecured debt and are structurally subordinate to the secured and unsecured debt of MPLX’s subsidiaries, including any debt of MarkWest that remains outstanding. On February 12, 2015, MPLX completed a public offering of $500 million aggregate principal amount of four percent unsecured senior notes due February 15, 2025. The net proceeds, which were approximately $495 million after deducting underwriting discounts, were used to repay the amounts outstanding under the MPLX bank revolving credit facility, as well as for general partnership purposes. Interest is payable semi-annually in arrears on February 15th and August 15th of each year. |
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Supplemental Cash Flow Information |
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| Supplemental Cash Flow Information [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Supplemental Cash Flow Information | Supplemental Cash Flow Information
The consolidated statements of cash flows exclude changes to the consolidated balance sheets that did not affect cash. The following is a reconciliation of additions to property, plant and equipment to total capital expenditures:
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Accumulated Other Comprehensive Loss |
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| Accumulated Other Comprehensive Loss | Accumulated Other Comprehensive Loss The following table shows the changes in accumulated other comprehensive loss by component. Amounts in parentheses indicate debits.
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| Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Defined Benefit Pension and Other Postretirement Plans | Defined Benefit Pension and Other Postretirement Plans We have noncontributory defined benefit pension plans covering substantially all employees. Benefits under these plans have been based primarily on age, years of service and final average pensionable earnings. The years of service component of this formula was frozen as of December 31, 2009. Benefits for service beginning January 1, 2010 are based on a cash balance formula with an annual percentage of eligible pay credited based upon age and years of service. Eligible Speedway employees accrue benefits under a defined contribution plan for service years beginning January 1, 2010. We also have other postretirement benefits covering most employees. Health care benefits are provided through comprehensive hospital, surgical and major medical benefit provisions subject to various cost-sharing features. Retiree life insurance benefits are provided to a closed group of retirees. Other postretirement benefits are not funded in advance. Obligations and funded status – The accumulated benefit obligation for all defined benefit pension plans was $1,914 million and $1,918 million as of December 31, 2016 and 2015. The following summarizes our defined benefit pension plans that have accumulated benefit obligations in excess of plan assets.
The following summarizes the projected benefit obligations and funded status for our defined benefit pension and other postretirement plans:
Components of net periodic benefit cost and other comprehensive loss – The following summarizes the net periodic benefit costs and the amounts recognized as other comprehensive loss for our defined benefit pension and other postretirement plans.
Lump sum payments to employees retiring in 2016, 2015 and 2014 exceeded the plan’s total service and interest costs expected for those years. Settlement losses are required to be recorded when lump sum payments exceed total service and interest costs. As a result, pension settlement expenses were recorded in 2016, 2015 and 2014 related to our cumulative lump sum payments made during those years. The estimated net actuarial loss and prior service credit for our defined benefit pension plans that will be amortized from accumulated other comprehensive loss into net periodic benefit cost in 2017 are $35 million and $39 million, respectively. The estimated net actuarial loss and prior service credit for our other defined benefit postretirement plans that will be amortized from accumulated other comprehensive loss into net periodic benefit cost in 2017 is $2 million and $3 million, respectively. Plan assumptions – The following summarizes the assumptions used to determine the benefit obligations at December 31, and net periodic benefit cost for the defined benefit pension and other postretirement plans for 2016, 2015 and 2014.
Expected long-term return on plan assets The overall expected long-term return on plan assets assumption is determined based on an asset rate-of-return modeling tool developed by a third-party investment group. The tool utilizes underlying assumptions based on actual returns by asset category and inflation and takes into account our asset allocation to derive an expected long-term rate of return on those assets. Capital market assumptions reflect the long-term capital market outlook. The assumptions for equity and fixed income investments are developed using a building-block approach, reflecting observable inflation information and interest rate information available in the fixed income markets. Long-term assumptions for other asset categories are based on historical results, current market characteristics and the professional judgment of our internal and external investment teams. Assumed health care cost trend The following summarizes the assumed health care cost trend rates.
Increases in the post-65 medical plan premium for the Marathon Petroleum Health Plan and the Marathon Petroleum Retiree Health Plan are the lower of the trend rate or four percent. Assumed health care cost trend rates have a significant effect on the amounts reported for defined benefit retiree health care plans. A one percentage point change in assumed health care cost trend rates would have the following effects:
Plan investment policies and strategies The investment policies for our pension plan assets reflect the funded status of the plans and expectations regarding our future ability to make further contributions. Long-term investment goals are to: (1) manage the assets in accordance with the legal requirements of all applicable laws; (2) diversify plan investments across asset classes to achieve an optimal balance between risk and return and between income and growth of assets through capital appreciation; and (3) source benefit payments primarily through existing plan assets and anticipated future returns. The investment goals are implemented to manage the plans’ funded status volatility and minimize future cash contributions. The asset allocation strategy will change over time in response to changes primarily in funded status, which is dictated by current and anticipated market conditions, the independent actions of our investment committee, required cash flows to and from the plans and other factors deemed appropriate. Such changes in asset allocation are intended to allocate additional assets to the fixed income asset class should the funded status improve. The fixed income asset class shall be invested in such a manner that its interest rate sensitivity correlates highly with that of the plans’ liabilities. Other asset classes are intended to provide additional return with associated higher levels of risk. Investment performance and risk is measured and monitored on an ongoing basis through quarterly investment meetings and periodic asset and liability studies. At December 31, 2016, the primary plan’s targeted asset allocation was 51 percent equity, private equity, real estate, and timber securities and 49 percent fixed income securities. Fair value measurements Plan assets are measured at fair value. The following provides a description of the valuation techniques employed for each major plan asset category at December 31, 2016 and 2015. Cash and cash equivalents – Cash and cash equivalents include a collective fund serving as the investment vehicle for the cash reserves and cash held by third-party investment managers. The collective fund is valued at net asset value (“NAV”) on a scheduled basis using a cost approach, and is considered a Level 2 asset. Cash and cash equivalents held by third-party investment managers are valued using a cost approach and are considered Level 2. Equity – Equity investments includes common stock, mutual and pooled funds. Common stock investments are valued using a market approach, which are priced daily in active markets and are considered Level 1. Mutual and pooled equity funds are well diversified portfolios, representing a mix of strategies in domestic, international and emerging market strategies. Mutual funds are publicly registered, valued at NAV on a daily basis using a market approach and are considered Level 1 assets. Pooled funds are valued at NAV using a market approach and are considered Level 2. Fixed Income – Fixed income investments include corporate bonds, U.S. dollar treasury bonds and municipal bonds. These securities are priced on observable inputs using a combination of market, income and cost approaches. These securities are considered Level 2 assets. Fixed income also includes a well diversified bond portfolio structured as a pooled fund. This fund is valued at NAV on a daily basis using a market approach and is considered Level 2. Private Equity – Private equity investments include interests in limited partnerships which are valued using information provided by external managers for each individual investment held in the fund. These holdings are considered Level 3. Real Estate – Real estate investments consist of interests in limited partnerships. These holdings are either appraised or valued using investment manager’s assessment of assets held. These holdings are considered Level 3. Other – Other investments include two limited liability companies (“LLCs”) with no public market. The LLCs were formed to acquire timberland in the northwest U.S. These holdings are either appraised or valued using investment manager’s assessment of assets held. These holdings are considered Level 3. Other investments classified as Level 1 include publicly traded depository receipts. The following tables present the fair values of our defined benefit pension plans’ assets, by level within the fair value hierarchy, as of December 31, 2016 and 2015.
The following is a reconciliation of the beginning and ending balances recorded for plan assets classified as Level 3 in the fair value hierarchy:
Cash Flows Contributions to defined benefit plans – Our funding policy with respect to the funded pension plans is to contribute amounts necessary to satisfy minimum pension funding requirements, including requirements of the Pension Protection Act of 2006, plus such additional, discretionary, amounts from time to time as determined appropriate by management. In 2016, we made pension contributions totaling $119 million. We have no required funding for 2017, but may make voluntary contributions at our discretion. Cash contributions to be paid from our general assets for the unfunded pension and postretirement plans are estimated to be approximately $14 million and $32 million, respectively, in 2017. Estimated future benefit payments – The following gross benefit payments, which reflect expected future service, as appropriate, are expected to be paid in the years indicated.
Contributions to defined contribution plans – We also contribute to several defined contribution plans for eligible employees. Contributions to these plans totaled $113 million, $94 million and $86 million in 2016, 2015 and 2014, respectively. Multiemployer Pension Plan We contribute to one multiemployer defined benefit pension plan under the terms of a collective-bargaining agreement that covers some of our union-represented employees. The risks of participating in this multiemployer plan are different from single-employer plans in the following aspects:
Our participation in this plan for 2016, 2015 and 2014 is outlined in the table below. The “EIN” column provides the Employee Identification Number for the plan. The most recent Pension Protection Act zone status available in 2016 and 2015 is for the plan’s year ended December 31, 2015 and December 31, 2014, respectively. The zone status is based on information that we received from the plan and is certified by the plan’s actuary. Among other factors, plans in the red zone are generally less than 65 percent funded. The “FIP/RP Status Pending/Implemented” column indicates a financial improvement plan or a rehabilitation plan has been implemented. The last column lists the expiration date of the collective-bargaining agreement to which the plan is subject. There have been no significant changes that affect the comparability of 2016, 2015 and 2014 contributions. Our portion of the contributions does not make up more than five percent of total contributions to the plan.
Multiemployer Health and Welfare Plan We contribute to one multiemployer health and welfare plan that covers both active employees and retirees. Through the health and welfare plan employees receive medical, dental, vision, prescription and disability coverage. Our contributions to this plan totaled $6 million, $7 million and $6 million for 2016, 2015 and 2014, respectively. |
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Stock-Based Compensation Plans |
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| Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Stock-Based Compensation Plans | Stock-Based Compensation Plans Description of the Plans Effective April 26, 2012, our employees and non-employee directors became eligible to receive equity awards under the Marathon Petroleum Corporation 2012 Incentive Compensation Plan (“MPC 2012 Plan”). The MPC 2012 Plan authorizes the Compensation Committee of our board of directors (“Committee”) to grant non-qualified or incentive stock options, stock appreciation rights, stock awards (including restricted stock and restricted stock unit awards), cash awards and performance awards to our employees and non-employee directors. Under the MPC 2012 Plan, no more than 50 million shares of our common stock may be delivered and no more than 20 million shares of our common stock may be the subject of awards that are not stock options or stock appreciation rights. In the sole discretion of the Committee, 20 million shares of our common stock may be granted as incentive stock options. Shares issued as a result of awards granted under these plans are funded through the issuance of new MPC common shares. Prior to April 26, 2012, our employees and non-employee directors were eligible to receive equity awards under the Marathon Petroleum Corporation 2011 Second Amended and Restated Incentive Compensation Plan (“MPC 2011 Plan”). Stock-based awards under the Plans We expense all share-based payments to employees and non-employee directors based on the grant date fair value of the awards over the requisite service period, adjusted for estimated forfeitures. Stock Options – We grant stock options to certain officer and non-officer employees. All of the stock options granted in 2016 fell under the MPC 2012 Plan. Stock options awarded under the MPC 2011 Plan and the MPC 2012 Plan represent the right to purchase shares of our common stock at its fair market value, which is the closing price of MPC’s common stock on the date of grant. Stock options have a maximum term of ten years from the date they are granted, and vest over a requisite service period of three years. We use the Black Scholes option-pricing model to estimate the fair value of stock options granted, which requires the input of subjective assumptions. Restricted Stock and Restricted Stock Units – We grant restricted stock and restricted stock units to employees and non-employee directors. In general, restricted stock and restricted stock units granted to employees vest over a requisite service period of three years. Restricted stock and restricted stock unit awards granted after 2011 to officers are subject to an additional one year holding period after the three-year vesting period. Restricted stock recipients who received grants in 2012 and after have the right to vote such stock; however, dividends are accrued and will be paid upon vesting. Restricted stock units granted to non-employee directors are considered to vest immediately at the time of the grant for accounting purposes, as they are non-forfeitable, but are not issued until the director’s departure from the board of directors. Restricted stock unit recipients do not have the right to vote such shares and receive dividend equivalents payable upon vesting. The non-vested shares are not transferable and are held by our transfer agent. The fair values of restricted stock are equal to the market price of our common stock on the grant date. Performance Units – We grant performance unit awards to certain officer employees. Performance units are dollar denominated. The target value of all performance units is $1.00, with actual payout up to $2.00 per unit (up to 200 percent of target). Performance units issued under the MPC 2012 Plan have a 36-month requisite service period. The payout value of these awards will be determined by the relative ranking of the total shareholder return (“TSR”) of MPC common stock compared to the TSR of a select group of peer companies, as well as the Standard & Poor’s 500 Energy Index fund over an average of four measurement periods. These awards will be settled 25 percent in MPC common stock and 75 percent in cash. The number of shares actually distributed will be determined by dividing 25 percent of the final payout by the closing price of MPC common stock on the day the Committee certifies the final TSR rankings, or the next trading day if the certification is made outside of normal trading hours. The performance units paying out in cash are accounted for as liability awards and recorded at fair value with a mark-to-market adjustment made each quarter. The performance units that settle in shares are accounted for as equity awards. Total Stock-Based Compensation Expense The following table reflects activity related to our stock-based compensation arrangements:
Stock Option Awards The Black Scholes option-pricing model values used to value stock option awards granted were determined based on the following weighted average assumptions:
The expected life of stock options granted is based on historical data and represents the period of time that options granted are expected to be held prior to exercise. The 2016 assumption for expected volatility of our stock price reflects a weighting of 50 percent of our common stock implied volatility and 50 percent of our common stock historical volatility. The risk-free interest rate for periods within the expected life of the option is based on the U.S. Treasury yield curve in effect at the time of the grant. The following is a summary of our common stock option activity in 2016:
The intrinsic value of options exercised by MPC employees during 2016, 2015 and 2014 was $14 million, $60 million and $48 million, respectively. As of December 31, 2016, unrecognized compensation cost related to stock option awards was $8 million, which is expected to be recognized over a weighted average period of 1.5 years. Restricted Stock Awards The following is a summary of restricted stock award activity of our common stock in 2016:
Of the 361,117 restricted stock units outstanding, 343,327 are vested and have a weighted average grant date fair value of $27.25. These vested but unissued units are held by our non-employee directors and certain officers, are non-forfeitable and are issuable upon the director’s departure from our board of directors or officers end of employment with the company. The following is a summary of the values related to restricted stock and restricted stock unit awards held by MPC employees and non-employee directors:
As of December 31, 2016, unrecognized compensation cost related to restricted stock awards was $34 million, which is expected to be recognized over a weighted average period of 1.5 years. There was no material unrecognized compensation cost related to restricted stock unit awards. Performance Unit Awards The following table presents a summary of the 2016 activity for performance unit awards to be settled in shares:
The number of shares that would be issued upon target vesting, using the closing price of our common stock on December 31, 2016 would be 124,234 shares. As of December 31, 2016, unrecognized compensation cost related to equity-classified performance unit awards was $2 million, which is expected to be recognized over a weighted average period of 1.5 years. Performance units paying out in units have a grant date fair value calculated using a Monte Carlo valuation model, which requires the input of subjective assumptions. The following table provides a summary of these assumptions:
The risk-free interest rate for the remaining performance period as of the grant date is based on the U.S. Treasury yield curve in effect at the time of the grant. The look-back period reflects the remaining performance period at the grant date. The assumption for the expected volatility of our stock price reflects the average MPC common stock historical volatility. MPLX Awards Our wholly-owned subsidiary and the general partner of MPLX, MPLX GP LLC (“MPLX GP”), maintains a unit-based compensation plan for officers, directors and employees (including any other individual who may be considered an “employee” under a Registration Statement on Form S-8 or any successor form) of MPLX GP. The MPLX 2012 Incentive Compensation Plan (“MPLX Plan”) permits various types of equity awards including but not limited to grants of phantom units and performance units. Awards granted under the MPLX Plan will be settled with MPLX units. Compensation expense for these awards were not material to our consolidated financial statements for the years ended December 31, 2016, 2015 and 2014. |
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Leases |
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| Leases of Lessee Disclosure | Lessee We lease a wide variety of facilities and equipment under operating leases, including land and building space, office equipment, storage facilities and transportation equipment. Most long-term leases include renewal options and, in certain leases, purchase options. Future minimum commitments as of December 31, 2016, for capital lease obligations and for operating lease obligations having initial or remaining non-cancellable lease terms in excess of one year are as follows:
Operating lease rental expense was:
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| Leases of Lessor Disclosure | Lessor MPLX has certain natural gas gathering, transportation and processing agreements in which it is considered to be the lessor under several implicit operating lease arrangements in accordance with US GAAP. MPLX’s primary implicit lease operations relate to a natural gas gathering agreement in the Marcellus region for which it earns a fixed-fee for providing gathering services to a single producer using a dedicated gathering system. As the gathering system is expanded, the fixed-fee charged to the producer is adjusted to include the additional gathering assets in the lease. The primary term of the natural gas gathering arrangement expires in 2023 and will continue thereafter on a year to year basis until terminated by either party. Other significant implicit leases relate to a natural gas processing agreement in the Marcellus region and a natural gas processing agreement in the Southern Appalachia region for which MPLX earns minimum monthly fees for providing processing services to a single producer using a dedicated processing plant. The primary term of these natural gas processing agreements expire during 2023 and 2030. Our revenue from implicit lease arrangements, excluding executory costs, totaled approximately $246 million, $16 million and $0 million in 2016, 2015 and 2014, respectively. The implicit lease arrangements related to the processing facilities contain contingent rental provisions whereby we receive additional fees if the producer customer exceeds the monthly minimum processed volumes. During the year ended December 31, 2016, we received $7 million in contingent lease payments and less than $1 million for the year ended December 31, 2015. The following is a schedule of minimum future rentals on the non‑cancellable operating leases as of December 31, 2016:
The following schedule summarizes our investment in assets held for operating lease by major classes as of December 31, 2016:
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Commitments and Contingencies |
12 Months Ended |
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Dec. 31, 2016 | |
| Commitments and Contingencies Disclosure [Abstract] | |
| Commitments and Contingencies | Commitments and Contingencies We are 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 we have not recorded an accrued liability, we are unable to estimate a range of possible loss because the issues involved have not been fully developed through pleadings and discovery. However, the ultimate resolution of some of these contingencies could, individually or in the aggregate, be material. Environmental matters – We are subject to federal, state, local and foreign 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 and certain other locations including presently or formerly owned or operated retail marketing sites. Penalties may be imposed for noncompliance. At December 31, 2016 and 2015, accrued liabilities for remediation totaled $132 million and $163 million. It is not presently possible to estimate the ultimate amount of all remediation costs that might be incurred or the penalties if any that may be imposed. Receivables for recoverable costs from certain states, under programs to assist companies in clean-up efforts related to underground storage tanks at presently or formerly owned or operated retail marketing sites, were $58 million and $70 million at December 31, 2016 and 2015, respectively. We are involved in a number of environmental enforcement matters arising in the ordinary course of business. While the outcome and impact on us cannot be predicted with certainty, management believes the resolution of these environmental matters will not, individually or collectively, have a material adverse effect on our consolidated results of operations, financial position or cash flows. MarkWest Environmental Proceeding – In July 2015, representatives from the EPA and the United States Department of Justice conducted a raid on a pipeline launcher/receiver site of MarkWest Liberty Midstream & Resources, L.L.C., a wholly-owned subsidiary of MPLX (“MarkWest Liberty Midstream”), utilized for pipeline maintenance operations in Washington County, Pennsylvania pursuant to a search warrant issued by a magistrate of the United States District Court for the Western District of Pennsylvania. As part of this initiative, the U.S. Attorney’s Office for the Western District of Pennsylvania, with the assistance of EPA’s Criminal Investigation Division proceeded with an investigation of MarkWest’s launcher/receiver, pipeline and compressor station operations. In response to the investigation, MarkWest initiated independent studies which demonstrated that there was no risk to worker safety and no threat of public harm associated with MarkWest’s launcher/receiver operations. These findings were supported by a subsequent inspection and review by the Occupational Safety and Health Administration. After providing these studies, and other substantial documentation related to MarkWest's pipeline and compressor stations, and arranging site visits and conducting several meetings with the government’s representatives, on September 13, 2016, the U.S. Attorney’s Office for the Western District of Pennsylvania rendered a declination decision, dropping its criminal investigation and declining to pursue charges in this matter. MarkWest Liberty Midstream continues to discuss with the EPA and the State of Pennsylvania civil enforcement allegations associated with permitting or other related regulatory obligations for its launcher/receiver and compressor station facilities in the region. In connection with these discussions, MarkWest Liberty Midstream received an initial proposal from the EPA to settle all civil claims associated with this matter for the combination of a proposed cash penalty of approximately $2.4 million and proposed supplemental environmental projects with an estimated cost of approximately $3.6 million. MarkWest Liberty Midstream will be submitting a response asserting that this action involves novel issues surrounding primarily minor source emissions from facilities that the agencies themselves considered de minimis were not the subject of regulation and consequently that the settlement proposal is excessive. MarkWest will continue to negotiate with the EPA regarding the amount and scope of the proposed settlement. Other Lawsuits – In May 2015, the Kentucky attorney general filed a lawsuit against our wholly-owned subsidiary, MPC LP, in the United States District Court for the Western District of Kentucky asserting claims under federal and state antitrust statutes, the Kentucky Consumer Protection Act, and state common law. The complaint, as amended in July 2015, alleges that MPC LP used deed restrictions, supply agreements with customers and exchange agreements with competitors to unreasonably restrain trade in areas within Kentucky and seeks declaratory relief, unspecified damages, civil penalties, restitution and disgorgement of profits. At this early stage, the ultimate outcome of this litigation remains uncertain, and neither the likelihood of an unfavorable outcome nor the ultimate liability, if any, can be determined, and we are unable to estimate a reasonably possible loss (or range of loss) for this matter. We intend to vigorously defend ourselves in this matter. In May 2007, the Kentucky attorney general filed a lawsuit against us and Marathon Oil in state court in Franklin County, Kentucky for alleged violations of Kentucky’s emergency pricing and consumer protection laws following Hurricanes Katrina and Rita in 2005. The lawsuit alleges that we overcharged customers by $89 million during September and October 2005. The complaint seeks disgorgement of these sums, as well as penalties, under Kentucky’s emergency pricing and consumer protection laws. We are vigorously defending this litigation. We believe that this is the first lawsuit for damages and injunctive relief under the Kentucky emergency pricing laws to progress this far and it contains many novel issues. In May 2011, the Kentucky attorney general amended his complaint to include a request for immediate injunctive relief as well as unspecified damages and penalties related to our wholesale gasoline pricing in April and May 2011 under statewide price controls that were activated by the Kentucky governor on April 26, 2011 and which have since expired. The court denied the attorney general’s request for immediate injunctive relief, and the remainder of the 2011 claims likely will be resolved along with those dating from 2005. If the lawsuit is resolved unfavorably in its entirety, it could materially impact our consolidated results of operations, financial position or cash flows. However, management does not believe the ultimate resolution of this litigation will have a material adverse effect. We are 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 us cannot be predicted with certainty, we believe that the resolution of these other lawsuits and proceedings will not have a material adverse effect on our consolidated financial position, results of operations or cash flows. Guarantees – We have provided certain guarantees, direct and indirect, of the indebtedness of other companies. Under the terms of most of these guarantee arrangements, we would be required to perform should the guaranteed party fail to fulfill its obligations under the specified arrangements. In addition to these financial guarantees, we also have various performance guarantees related to specific agreements. Guarantees related to indebtedness of equity method investees – We hold interests in an offshore oil port, LOOP, and a crude oil pipeline system, LOCAP. Both LOOP and LOCAP have secured various project financings with throughput and deficiency agreements. Under the agreements, we are required to advance funds if the investees are unable to service their debt. Any such advances are considered prepayments of future transportation charges. The duration of the agreements vary but tend to follow the terms of the underlying debt, which extend through 2037. Our maximum potential undiscounted payments under these agreements for the debt principal totaled $172 million as of December 31, 2016. We hold an interest in a refined products pipeline through our investment in Centennial, and have guaranteed our portion of the payment of Centennial’s principal, interest and prepayment costs, if applicable, under a Master Shelf Agreement, which is scheduled to expire in 2024. The guarantee arose in order for Centennial to obtain adequate financing. Our maximum potential undiscounted payments under this agreement for debt principal totaled $29 million as of December 31, 2016. In connection with our 50 percent ownership in Crowley Ocean Partners, we have agreed to conditionally guarantee our portion of the obligations of the joint venture and its subsidiaries under a senior secured term loan agreement. The term loan agreement provides for loans of up to $325 million to finance the acquisition of four product tankers. MPC’s liability under the guarantee for each vessel is conditioned upon the occurrence of certain events, including if we cease to maintain an investment grade credit rating or the charter for the relevant product tanker ceases to be in effect and is not replaced by a charter with an investment grade company on certain defined commercial terms. As of December 31, 2016, our maximum potential undiscounted payments under this agreement for debt principal totaled $163 million. In connection with our 50 percent indirect interest in Crowley Blue Water Partners, we have agreed to provide a conditional guarantee of up to 50 percent of its outstanding debt balance in the event there is no charter agreement in place with an investment grade customer for the entity’s three vessels as well as other financial support in certain circumstances. The maximum exposure under these arrangements is 50 percent of the amount of the debt, which was $142 million as of December 31, 2016. Marathon Oil indemnifications – In conjunction with the Spinoff, we have entered into arrangements with Marathon Oil providing indemnities and guarantees with recorded values of $2 million as of December 31, 2016, which consist of unrecognized tax benefits related to MPC, its consolidated subsidiaries and the RM&T Business operations prior to the Spinoff which are not already reflected in the unrecognized tax benefits described in Note 12, and other contingent liabilities Marathon Oil may incur related to taxes. Furthermore, the separation and distribution agreement and other agreements with Marathon Oil to effect the Spinoff provide for cross-indemnities between Marathon Oil and us. In general, Marathon Oil is required to indemnify us for any liabilities relating to Marathon Oil’s historical oil and gas exploration and production operations, oil sands mining operations and integrated gas operations, and we are required to indemnify Marathon Oil for any liabilities relating to Marathon Oil’s historical refining, marketing and transportation operations. The terms of these indemnifications are indefinite and the amounts are not capped. Other guarantees – We have entered into other guarantees with maximum potential undiscounted payments totaling $82 million as of December 31, 2016, which consist primarily of a commitment to contribute cash to an equity method investee for certain catastrophic events, up to $50 million per event, in lieu of procuring insurance coverage and leases of assets containing general lease indemnities and guaranteed residual values. General guarantees associated with dispositions – Over the years, we have sold various assets in the normal course of our 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 us to perform upon the occurrence of a triggering event or condition. These guarantees and indemnifications are part of the normal course of selling assets. We are 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 December 31, 2016 and 2015, our contractual commitments to acquire property, plant and equipment and advance funds to equity method investees totaled $899 million and $1.6 billion. The contractual commitments at December 31, 2016 includes $131 million of contingent consideration associated with the acquisition of the Galveston Bay Refinery and Related Assets. The contractual commitments at December 31, 2015 included the $331 million contingent consideration associated with the acquisition of the Galveston Bay Refinery and Related Assets, $630 million for contributions to North Dakota Pipeline and $69 million for contributions to Crowley Ocean Partners. See Note 17 for additional information on the contingent consideration. Certain natural gas processing and gathering arrangements require us to construct 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 producer customers may have the right to cancel the processing arrangements if there are significant delays that are not due to force majeure. As of December 31, 2016, management does not believe there are any indications that we 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. |
Subsequent Event |
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| Subsequent Events [Abstract] | |||||
| Subsequent Event |
On February 6, 2017, MPLX announced that its wholly-owned subsidiary, MarkWest, and Antero Midstream Partners L.P. (“Antero Midstream”) formed a strategic joint venture, Sherwood Midstream LLC, to support the development of Antero Resources Corporation’s extensive Marcellus Shale acreage in the prolific rich-gas corridor of West Virginia. In connection with this transaction, MarkWest contributed approximately $134 million of assets currently under construction at the Sherwood Complex and Antero Midstream made an initial capital contribution of approximately $154 million. On February 10, 2017, MPLX completed a public offering of $1.25 billion aggregate principal amount of 4.125% unsecured senior notes due March 2027 and $1.0 billion aggregate principal amount of 5.200% unsecured senior notes due March 2047. MPLX intends to use the net proceeds from this offering for general partnership purposes, which may include, from time to time, acquisitions (including the previously announced planned dropdown of assets from MPC) and capital expenditures. On February 13, 2017, MPLX announced that it had entered into an asset purchase agreement with Enbridge Pipelines (Ozark) LLC (“Enbridge Ozark”), under which an affiliate of Pipe Line Holdings has agreed to purchase the Ozark pipeline for approximately $220 million from Enbridge Ozark. 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 purchase transaction is expected to close in the first quarter of 2017, subject to customary closing conditions, including regulatory approvals. |
Selected Quarterly Financial Data |
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| Selected Quarterly Financial Data | Selected Quarterly Financial Data (Unaudited)
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| Text Block [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Supplementary Statistics | Supplementary Statistics (Unaudited)
Supplementary Statistics (Unaudited)
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Summary Of Principal Accounting Policies (Policies) |
12 Months Ended |
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Dec. 31, 2016 | |
| Accounting Policies [Abstract] | |
| Principles applied in consolidation | Principles applied in consolidation – These consolidated financial statements include the accounts of our majority-owned, controlled subsidiaries and MPLX. Changes in ownership interest in consolidated subsidiaries that do not result in a change in control are recorded as an equity transaction. As of December 31, 2016, we owned a 25.5 percent interest in MPLX, including a two percent general partner interest. This ownership percentage reflects the conversion of the MPLX Class B Units in July 2017 at 1.09 to 1.00. Due to our 100 percent ownership of the general partner interest, we have determined that we control MPLX and therefore we consolidate MPLX and record a noncontrolling interest for the 74.5 percent interest owned by the public. Investments in entities over which we have significant influence, but not control, are accounted for using the equity method of accounting. This includes entities in which we hold majority ownership but the minority shareholders have substantive participating rights. Income from equity method investments represents our proportionate share of net income generated by the equity method investees. Differences in the basis of the investments and the separate net asset values of the investees, if any, are amortized into net income over the remaining useful lives of the underlying assets and liabilities, except for the excess related to goodwill. Equity method investments are evaluated for impairment whenever changes in the facts and circumstances indicate an other than temporary loss in value has occurred. When the loss is deemed to be other than temporary, the carrying value of the equity method investment is written down to fair value, and the amount of the write-down is included in net income. |
| Use of estimates | Use of estimates – The preparation of financial statements in accordance with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities as of the date of the consolidated financial statements and the reported amounts of revenues and expenses during the respective reporting periods. |
| Revenue recognition | Revenue recognition – Revenues are recognized when products are shipped or services are provided to customers, title is transferred, the sales price is fixed or determinable and collectability is reasonably assured. Costs associated with revenues are recorded in cost of revenues. Shipping and other transportation costs billed to our customers are presented on a gross basis in revenues and cost of revenues. Rebates from vendors are recognized as a reduction of cost of revenues when the initiating transaction occurs. Incentives that are derived from contractual provisions are accrued based on past experience and recognized in cost of revenues. Rebates to customers are reflected as a reduction of revenue and are accrued for in “Accounts payable” on the consolidated balance sheets. |
| Crude oil and refined product exchanges and matching buy/sell transactions | Crude oil and refined product exchanges and matching buy/sell transactions – We enter into exchange contracts and matching buy/sell arrangements whereby we agree to deliver a particular quantity and quality of crude oil or refined products at a specified location and date to a particular counterparty and to receive from the same counterparty the same commodity at a specified location on the same or another specified date. The exchange receipts and deliveries are nonmonetary transactions, with the exception of associated grade or location differentials that are settled in cash. The matching buy/sell purchase and sale transactions are settled in cash. Both exchange and matching buy/sell transactions are accounted for as exchanges of inventory and no revenues are recorded. The exchange transactions are recognized at the carrying amount of the inventory transferred. |
| Consumer excise taxes | Consumer excise taxes – We are required by various governmental authorities, including countries, states and municipalities, to collect and remit taxes on certain consumer products. Such taxes are presented on a gross basis in revenues and costs and expenses in the consolidated statements of income. |
| Cash and cash equivalents | Cash and cash equivalents – Cash and cash equivalents include cash on hand and on deposit and investments in highly liquid debt instruments with maturities of three months or less. |
| Restricted cash | Restricted cash – Restricted cash consists of cash and investments that must be maintained as collateral for letters of credit issued to certain third party producer customers. The balances will be outstanding until certain capital projects are completed and the third party releases the restriction. Restricted cash also consists of cash advances to be used for the operation and maintenance of an operated pipeline system. At December 31, 2016 and 2015, the amount of restricted cash included in “Other current assets” on the consolidated balance sheets were $5 million and $9 million, respectively, which is currently reflected in our Midstream segment |
| Accounts receivable and allowance for doubtful accounts | Accounts receivable and allowance for doubtful accounts – Our receivables primarily consist of customer accounts receivable. Customer receivables are recorded at the invoiced amounts and generally do not bear interest. Allowances for doubtful accounts are generally recorded when it becomes probable the receivable will not be collected and are booked to bad debt expense. The allowance for doubtful accounts is the best estimate of the amount of probable credit losses in customer accounts receivable. We review the allowance quarterly and past-due balances over 180 days are reviewed individually for collectability. Approximately 23 percent and 26 percent of our accounts receivable balances at December 31, 2016 and 2015, respectively, are related to sales of crude oil or refinery feedstocks to customers with whom we have master netting agreements. We have master netting agreements with more than 100 companies engaged in the crude oil or refinery feedstock trading and supply business or the petroleum refining industry. A master netting agreement generally provides for a once per month net cash settlement of the accounts receivable from and the accounts payable to a particular counterparty. |
| Inventories | Inventories – Inventories are carried at the lower of cost or market value. Cost of inventories is determined primarily under the LIFO method. Costs for crude oil, refinery feedstocks and refined product inventories are aggregated on a consolidated basis for purposes of assessing if the LIFO cost basis of these inventories may have to be written down to market value. |
| Derivative instruments | Derivative instruments – We use derivatives to economically hedge a portion of our exposure to commodity price risk and, historically, to interest rate risk. We also have limited authority to use selective derivative instruments that assume market risk. All derivative instruments (including derivative instruments embedded in other contracts) are recorded at fair value. Certain commodity derivatives are reflected on the consolidated balance sheets on a net basis by counterparty as they are governed by master netting agreements. Cash flows related to derivatives used to hedge commodity price risk and interest rate risk are classified in operating activities with the underlying transactions. Fair value accounting hedges – We used interest rate swaps to hedge our exposure to interest rate risk associated with fixed interest rate debt in our portfolio. These interest rate swap agreements were terminated in 2012. Changes in the fair values of both the hedged item and the related derivative were recognized immediately in net income with an offsetting effect included in the basis of the hedged item. The net effect was to report in net income the extent to which the accounting hedge was not effective in achieving offsetting changes in fair value. There was a gain on the termination of the agreements, which had been deferred and accounted for as an adjustment to our long-term debt balance. The gain was being amortized over the remaining life of the associated debt as a reduction of our interest expense, until the December 2015 extinguishment of our obligation for the associated debt. At such time, the remaining unamortized gain was credited to net interest and other financial income (costs). Derivatives not designated as accounting hedges –Derivatives that are not designated as accounting hedges may include commodity derivatives used to hedge price risk on (1) inventories, (2) fixed price sales of refined products, (3) the acquisition of foreign-sourced crude oil, (4) the acquisition of ethanol for blending with refined products, (5) the sale of NGLs, (6) the purchase of natural gas and (7) the purchase of electricity. Changes in the fair value of derivatives not designated as accounting hedges are recognized immediately in net income. Concentrations of credit risk – All of our financial instruments, including derivatives, involve elements of credit and market risk. The most significant portion of our credit risk relates to nonperformance by counterparties. The counterparties to our financial instruments consist primarily of major financial institutions and companies within the energy industry. To manage counterparty risk associated with financial instruments, we select and monitor counterparties based on an assessment of their financial strength and on credit ratings, if available. Additionally, we limit the level of exposure with any single counterparty. |
| Property, plant and equipment | Property, plant and equipment – Property, plant and equipment are recorded at cost and depreciated on a straight-line basis over the estimated useful lives of the assets, which range from two to 42 years. Such assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. If the sum of the expected undiscounted future cash flows from the use of the asset and its eventual disposition is less than the carrying amount of the asset, an impairment loss is recognized based on the fair value of the asset. When items of property, plant and equipment are sold or otherwise disposed of, any gains or losses are reported in net income. Gains on the disposal of property, plant and equipment are recognized when earned, which is generally at the time of closing. If a loss on disposal is expected, such losses are recognized when the assets are classified as held for sale. Interest expense is capitalized for qualifying assets under construction. Capitalized interest costs are included in property, plant and equipment and are depreciated over the useful life of the related asset. |
| Goodwill and intangible assets | Goodwill and intangible assets – Goodwill represents the excess of the purchase price over the estimated fair value of the net assets acquired in the acquisition of a business. Goodwill is not amortized, but rather is tested for impairment annually and when events or changes in circumstances indicate that the fair value of a reporting unit with goodwill has been reduced below carrying value. The impairment test requires allocating goodwill and other assets and liabilities to reporting units. The fair value of each reporting unit is determined and compared to the carrying value of the reporting unit. If the fair value of the reporting unit is less than the carrying value, including goodwill, the implied fair value of goodwill is calculated. The excess, if any, of the book value over the implied fair value of goodwill is charged to net income as an impairment expense. Amortization of intangibles with definite lives is calculated using the straight-line method which is reflective of the benefit pattern in which the estimated economic benefit is expected to be received over the estimated useful life of the intangible asset. Intangibles subject to amortization are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the intangible may not be recoverable. If the sum of the expected undiscounted future cash flows related to the asset is less than the carrying amount of the asset, an impairment loss is recognized based on the fair value of the asset. Intangibles not subject to amortization are tested for impairment annually and when circumstances indicate that the fair value is less than the carrying amount of the intangible. If the fair value is less than the carrying value, an impairment is recorded for the difference. |
| Major maintenance activities | Major maintenance activities – Costs for planned turnaround, major maintenance and engineered project activities are expensed in the period incurred. These types of costs include contractor repair services, materials and supplies, equipment rentals and our labor costs. |
| Environmental costs | Environmental costs – Environmental expenditures are capitalized for additional equipment that mitigates or prevents future contamination or improves environmental safety or efficiency of the existing assets. We recognize remediation costs and penalties when the responsibility to remediate is probable and the amount of associated costs can be reasonably estimated. The timing of remediation accruals coincides with completion of a feasibility study or the commitment to a formal plan of action. Remediation liabilities are accrued based on estimates of known environmental exposure and are discounted when the estimated amounts are reasonably fixed and determinable. If recoveries of remediation costs from third parties are probable, a receivable is recorded and is discounted when the estimated amount is reasonably fixed and determinable. |
| Asset retirement obligations | Asset retirement obligations – The fair value of asset retirement obligations is recognized in the period in which the obligations are incurred if a reasonable estimate of fair value can be made. The majority of our recognized asset retirement liability relates to conditional asset retirement obligations for removal and disposal of fire-retardant material from certain refining facilities. The remaining recognized asset retirement liability relates to other refining assets, the removal of underground storage tanks at our leased convenience stores, certain pipelines and processing facilities and other related pipeline assets. The fair values recorded for such obligations are based on the most probable current cost projections. The recorded asset retirement obligations are not material to the consolidated financial statements. Asset retirement obligations have not been recognized for some assets because the fair value cannot be reasonably estimated since the settlement dates of the obligations are indeterminate. Such obligations will be recognized in the period when sufficient information becomes available to estimate a range of potential settlement dates. The asset retirement obligations principally include the hazardous material disposal and removal or dismantlement requirements associated with the closure of certain refining, terminal, retail, pipeline and processing assets. Our practice is to keep our assets in good operating condition through routine repair and maintenance of component parts in the ordinary course of business and by continuing to make improvements based on technological advances. As a result, we believe that generally these assets have no expected settlement date for purposes of estimating asset retirement obligations since the dates or ranges of dates upon which we would retire these assets cannot be reasonably estimated at this time. |
| Income taxes | Income taxes – Deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial statement carrying amounts of assets and liabilities and their tax bases. Deferred tax assets are recorded when it is more likely than not that they will be realized. The realization of deferred tax assets is assessed periodically based on several factors, primarily our expectation to generate sufficient future taxable income. |
| Stock-based compensation arrangements | Stock-based compensation arrangements – The fair value of stock options granted to our employees is estimated on the date of grant using the Black-Scholes option pricing model. The model employs various assumptions, based on management’s estimates at the time of grant, which impact the calculation of fair value and ultimately, the amount of expense that is recognized over the vesting period of the stock option award. Of the required assumptions, the expected life of the stock option award and the expected volatility of our stock price have the most significant impact on the fair value calculation. The average expected life is based on our historical employee exercise behavior. The assumption for expected volatility of our stock price reflects a weighting of 50 percent of our common stock implied volatility and 50 percent of our common stock historical volatility. The fair value of restricted stock awards granted to our employees is determined based on the fair market value of our common stock on the date of grant. The fair value of performance unit awards granted to our employees is estimated on the date of grant using a Monte Carlo valuation model. Our stock-based compensation expense is recognized based on management’s estimate of the awards that are expected to vest, using the straight-line attribution method for all service-based awards with a graded vesting feature. If actual forfeiture results are different than expected, adjustments to recognized compensation expense may be required in future periods. Unearned stock-based compensation is charged to equity when restricted stock awards are granted. Compensation expense is recognized over the vesting period and is adjusted if conditions of the restricted stock award are not met. |
| Business combinations | Business combinations - We recognize and measure the assets acquired and liabilities assumed in a business combination based on their estimated fair values at the acquisition date, with any remaining difference versus the purchase consideration recorded as goodwill or gain from a bargain purchase. For all material acquisitions, management engages an independent valuation specialist to assist with the determination of fair value of the assets acquired, liabilities assumed, noncontrolling interest, if any, and goodwill, based on recognized business valuation methodologies. If the initial accounting for the business combination is incomplete by the end of the reporting period in which the acquisition occurs, an estimate will be recorded. Subsequent to the acquisition, and not later than one year from the acquisition date, we will record any material adjustments to the initial estimate based on new information obtained about facts and circumstances that existed as of the acquisition date. An income, market or cost valuation method may be utilized to estimate the fair value of the assets acquired, liabilities assumed, and noncontrolling interest, if any, in a business combination. The income valuation method represents the present value of future cash flows over the life of the asset using: (i) discrete financial forecasts, which rely on management’s estimates of revenue and operating expenses; (ii) long-term growth rates; and (iii) appropriate discount rates. The market valuation method uses prices paid for a reasonably similar asset by other purchasers in the market, with adjustments relating to any differences between the assets. The cost valuation method is based on the replacement cost of a comparable asset at prices at the time of the acquisition reduced for depreciation of the asset. Acquisition-related costs are expensed as incurred in connection with each business combination. |
| Renewable fuel identification numbers (RINs) | Renewable fuel identification numbers – We purchase RINs to satisfy a portion of our RFS2 compliance. We record a short-term intangible asset, included in “Other current assets” on the balance sheet, for RINs owned in excess of our anticipated current period compliance requirements. The asset value is based on the product of the excess RINs as of the balance sheet date, if any, and the average cost of our RINs. We record a current liability, included in “Other current liabilities” on the balance sheet, when we are deficient RINs based on the product of the deficient RINs as of the balance sheet date, if any, and the market price of the RINs at the balance sheet date. The cost of RINs used for compliance is reflected in “Cost of revenues” on the income statement. Any gains or losses on the sale or expiration of RINs are classified as “Other income” on the income statement. Proceeds from RIN sales are included in investing activities - “All other, net” on the cash flow statement. |
MPLX LP (Tables) |
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| Noncontrolling Interest [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Noncontrolling Interest | Changes in MPC’s equity resulting from changes in its ownership interest in MPLX were as follows:
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Acquisitions and Investments (Tables) |
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| Business Acquisition [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Business Acquisition, Pro Forma Information | The following unaudited pro forma financial information presents consolidated results assuming the MarkWest Merger occurred on January 1, 2014 and the Hess’ Retail Operations and Related Assets acquisition occurred on January 1, 2013.
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| MarkWest | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Business Acquisition [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Components Of The Fair Value Of Consideration Transferred | The components of the fair value of consideration transferred are as follows:
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| Schedule of Recognized Identified Assets Acquired and Liabilities Assumed | The following table summarizes the final purchase price allocation. Subsequent to December 31, 2015, additional analysis was completed and adjustments were made to the preliminary purchase price allocation as noted in the table below. The estimated fair value of assets acquired and liabilities and noncontrolling interests assumed at the acquisition date, are as follows:
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| Business Acquisition, Pro Forma Information | The amounts of revenue and income from operations associated with the MarkWest Merger included in our consolidated statements of income for 2015 are as follows:
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| Hess Retail Operations and Related Assets | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Business Acquisition [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Business Acquisition, Pro Forma Information | The amounts of revenue and income from operations associated with Hess’ Retail Operations and Related Assets included in our consolidated statements of income for 2014 are as follows:
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Related Party Transactions (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Related Party Transactions [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Sales to Related Parties | Sales to related parties, which are included in “Sales and other operating revenues (including consumer excise taxes)” on the accompanying consolidated statements of income, were as follows:
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| Other Income From Related Parties | Other income from related parties, which is included in “Other income” on the accompanying consolidated statements of income, were as follows:
Other income from related parties consists primarily of fees received for operating transportation assets for our related parties. |
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| Purchases From Related Parties | Purchases from related parties were as follows:
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| Receivables From Related Parties | Receivables from related parties, which are included in “Receivables, less allowance for doubtful accounts” on the accompanying consolidated balance sheets, were as follows:
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| Payables To Related Parties | Payables to related parties, which are included in “Accounts payable” on the accompanying consolidated balance sheets, were as follows:
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Income per Common Share (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Earnings Per Share [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Summary of Earnings Per Common Share | MPC grants certain incentive compensation awards to employees and non-employee directors that are considered to be participating securities. Due to the presence of participating securities, we have calculated our earnings per share using the two-class method.
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| Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share | The following table summarizes the shares that were anti-dilutive, and therefore, were excluded from the diluted share calculation.
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Equity (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Equity [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Share Repurchases | Total share repurchases were as follows for the respective periods:
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Segment Information (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Segment Reporting [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Income From Operations Attributable To Operating Segments |
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| Reconciliation Of Segment Income From Operations To Income Before Income Taxes | The following reconciles segment income from operations to income before income taxes as reported in the consolidated statements of income:
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| Reconciliation Of Segment Capital Expenditures And Investments To Total Capital Expenditures | The following reconciles segment capital expenditures and investments to total capital expenditures:
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| Reconciliation Of Total Revenues To Sales And Other Operating Revenues | The following reconciles total segment customer revenues to sales and other operating revenues (including consumer excise taxes) as reported in the consolidated statements of income:
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| Schedule Of Revenues By Product Line | Revenues by product line were:
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| Total Assets by Reportable Segment | Total assets by reportable segment were:
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Other Items (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other Income and Expenses [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Net Interest And Other Financial Income (Costs) | Net interest and other financial income (costs) was:
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Income Taxes (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Income Tax Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Components Of Income Tax Provisions (Benefits) | Income tax provisions (benefits) were:
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| Reconciliation Of Federal Statutory Income Tax Rate | A reconciliation of the federal statutory income tax rate (35 percent) applied to income before income taxes to the provision for income taxes follows:
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| Components Of Deferred Tax Assets And Liabilities | Deferred tax assets and liabilities resulted from the following:
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| Components Of Net Deferred Tax Liabilities Classified In Consolidated Balance Sheets | Net deferred tax liabilities were classified in the consolidated balance sheets as follows:
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| Summary Of Income Tax Returns Subject To Examination | As of December 31, 2016, our income tax returns remain subject to examination in the following major tax jurisdictions for the tax years indicated:
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| Summary Of Activity In Unrecognized Tax Benefits | The following table summarizes the activity in unrecognized tax benefits:
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Inventories (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Inventory Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Summary Of Inventories |
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Equity Method Investments (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Equity Method Investments and Joint Ventures [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule Of Equity Method Investments |
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| Summarized Financial Information For Equity Method Investees | Summarized financial information for equity method investees is as follows:
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Property, Plant and Equipment (Tables) |
12 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2016 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Property, Plant and Equipment [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Summary Of Property, Plant And Equipment |
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Goodwill and Intangibles (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Goodwill and Intangible Assets Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Changes in Carrying Amount of Goodwill | The changes in the carrying amount of goodwill for 2016 and 2015 were as follows:
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| Schedule of Acquired Finite-Lived Intangible Assets by Major Class | Our intangible assets as of December 31, 2016 and 2015 are as follows:
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| Schedule of Finite-Lived Intangible Assets, Future Amortization Expense | Estimated future amortization expense related to the intangible assets at December 31, 2016 is as follows:
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Fair Value Measurements (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair Value Disclosures [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Assets and Liabilities Accounted for at Fair Value on Recurring Basis | The following tables present assets and liabilities accounted for at fair value on a recurring basis as of December 31, 2016 and 2015 by fair value hierarchy level. We have elected to offset the fair value amounts recognized for multiple derivative contracts executed with the same counterparty, including any related cash collateral as shown below; however, fair value amounts by hierarchy level are presented on a gross basis in the following tables.
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| Reconciliation of Net Beginning and Ending Balances Recorded for Net Assets and Liabilities Classified as Level 3 | The following 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.
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| Assets Measured at Fair Value on a Nonrecurring Basis | The following table shows the values of assets, by major category, measured at fair value on a nonrecurring basis in periods subsequent to their initial recognition.
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| Financial Instruments at Fair Value, Excluding Derivative Financial Instruments and Contingent Consideration | The following table summarizes financial instruments on the basis of their nature, characteristics and risk at December 31, 2016 and 2015, excluding the derivative financial instruments and contingent consideration reported above.
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Derivatives (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Summary of Derivative Instruments [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Classification of Fair Values of Derivative Instruments, Excluding Cash Collateral | The following table presents the gross fair values of derivative instruments, excluding cash collateral, and where they appear on the consolidated balance sheets as of December 31, 2016 and 2015:
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| Open Commodity Derivative Contracts | The table below summarizes open commodity derivative contracts for crude oil and refined products as of December 31, 2016.
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| Effect of Commodity Derivative Instruments in Statements of Income | The following table summarizes the effect of all commodity derivative instruments in our consolidated statements of income:
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Debt (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Debt Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Outstanding Borrowings | Our outstanding borrowings at December 31, 2016 and 2015 consisted of the following:
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| Schedule Of Debt Payments | The following table shows five years of scheduled debt payments.
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Supplemental Cash Flow Information (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Supplemental Cash Flow Information [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Summary of Supplemental Cash Flow Information |
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| Schedule Of Reconciliation Of Additions To Property Plant And Equipment To Total Capital Expenditures | The consolidated statements of cash flows exclude changes to the consolidated balance sheets that did not affect cash. The following is a reconciliation of additions to property, plant and equipment to total capital expenditures:
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Accumulated Other Comprehensive Loss (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Equity [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Changes in Accumulated Other Comprehensive Loss by Component | The following table shows the changes in accumulated other comprehensive loss by component. Amounts in parentheses indicate debits.
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Defined Benefit Pension and Other Postretirement Plans (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Summary Of Defined Benefit Plans With Accumulated Benefit Obligations In Excess Of Plan Assets | The following summarizes our defined benefit pension plans that have accumulated benefit obligations in excess of plan assets.
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| Summary Of Projected Benefit Obligations And Funded Status For Defined Benefit Pension And Other Postretirement Plans | The following summarizes the projected benefit obligations and funded status for our defined benefit pension and other postretirement plans:
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| Components of Net Periodic Benefit Costs | Components of net periodic benefit cost and other comprehensive loss – The following summarizes the net periodic benefit costs and the amounts recognized as other comprehensive loss for our defined benefit pension and other postretirement plans.
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| Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Loss (Pretax) | Components of net periodic benefit cost and other comprehensive loss – The following summarizes the net periodic benefit costs and the amounts recognized as other comprehensive loss for our defined benefit pension and other postretirement plans.
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| Plan Assumptions | Plan assumptions – The following summarizes the assumptions used to determine the benefit obligations at December 31, and net periodic benefit cost for the defined benefit pension and other postretirement plans for 2016, 2015 and 2014.
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| Assumed Health Care Cost Trend Rates | The following summarizes the assumed health care cost trend rates.
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| Effects Of One Percentage Point Change In Assumed Health Care Cost Trend Rates | A one percentage point change in assumed health care cost trend rates would have the following effects:
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| Fair Values Of Defined Benefit Pension Plan Assets | The following tables present the fair values of our defined benefit pension plans’ assets, by level within the fair value hierarchy, as of December 31, 2016 and 2015.
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| Reconciliation Of Beginning And Ending Balances Of Plan Assets Classified As Level 3 | The following is a reconciliation of the beginning and ending balances recorded for plan assets classified as Level 3 in the fair value hierarchy:
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| Estimated Future Benefit Payment | Estimated future benefit payments – The following gross benefit payments, which reflect expected future service, as appropriate, are expected to be paid in the years indicated.
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| Multi Employer Pension Plan | Our participation in this plan for 2016, 2015 and 2014 is outlined in the table below. The “EIN” column provides the Employee Identification Number for the plan. The most recent Pension Protection Act zone status available in 2016 and 2015 is for the plan’s year ended December 31, 2015 and December 31, 2014, respectively. The zone status is based on information that we received from the plan and is certified by the plan’s actuary. Among other factors, plans in the red zone are generally less than 65 percent funded. The “FIP/RP Status Pending/Implemented” column indicates a financial improvement plan or a rehabilitation plan has been implemented. The last column lists the expiration date of the collective-bargaining agreement to which the plan is subject. There have been no significant changes that affect the comparability of 2016, 2015 and 2014 contributions. Our portion of the contributions does not make up more than five percent of total contributions to the plan.
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Stock-Based Compensation Plans (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Disclosure of Share-based Compensation Arrangements by Share-based Payment Award | The following table reflects activity related to our stock-based compensation arrangements:
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| Weighted Average Assumptions Used To Value Stock Options Awards | The Black Scholes option-pricing model values used to value stock option awards granted were determined based on the following weighted average assumptions:
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| Summary of Stock Option Award Activity | The following is a summary of our common stock option activity in 2016:
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| Summary of Restricted Stock Award Activity | The following is a summary of restricted stock award activity of our common stock in 2016:
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| Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity, Vested And Unvested | The following is a summary of the values related to restricted stock and restricted stock unit awards held by MPC employees and non-employee directors:
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| Schedule of Performance Unit Awards | The following table presents a summary of the 2016 activity for performance unit awards to be settled in shares:
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| Schedule of Share-based Compensation, Performance Unit Awards, Valuation Assumptions | Performance units paying out in units have a grant date fair value calculated using a Monte Carlo valuation model, which requires the input of subjective assumptions. The following table provides a summary of these assumptions:
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Leases (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Leases [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule Of Future Minimum Commitments | Future minimum commitments as of December 31, 2016, for capital lease obligations and for operating lease obligations having initial or remaining non-cancellable lease terms in excess of one year are as follows:
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| Schedule Of Operating Lease Rental Expense | Operating lease rental expense was:
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| Schedule of Future Minimum Rental Payments for Operating Leases | The following is a schedule of minimum future rentals on the non‑cancellable operating leases as of December 31, 2016:
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| Schedule of Property Subject to or Available for Operating Lease | The following schedule summarizes our investment in assets held for operating lease by major classes as of December 31, 2016:
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Selected Quarterly Financial Data (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Quarterly Financial Data [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule Of Quarterly Financial Information |
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Supplementary Statistics (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Text Block [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Supplementary Statistics |
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| Operating Statistics |
|
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MPLX LP (Narrative) (Detail) - MPLX LP |
12 Months Ended | |
|---|---|---|
Dec. 04, 2015 |
Dec. 31, 2016
Barge
Tow_Boat
|
|
| Noncontrolling Interest [Line Items] | ||
| Number of tow boats | Tow_Boat | 18 | |
| Number of barges | Barge | 200 | |
| MPC's ownership percentage of the general partner interest | 100.00% | |
| Noncontrolling interest (in percentage) | 74.50% | |
| MarkWest | ||
| Noncontrolling Interest [Line Items] | ||
| Common units conversion ratio | 1.09 | |
| Butane Cavern | ||
| Noncontrolling Interest [Line Items] | ||
| Ownership interest (in percentage) | 100.00% | |
| General Partner | ||
| Noncontrolling Interest [Line Items] | ||
| MPC's partnership interest in MPLX (in percentage) | 2.00% | |
| General Partner and Limited Partner | ||
| Noncontrolling Interest [Line Items] | ||
| MPC's partnership interest in MPLX (in percentage) | 25.50% | |
| MPLX Pipe Line Holdings LP | ||
| Noncontrolling Interest [Line Items] | ||
| Ownership interest (in percentage) | 100.00% | 100.00% |
MPLX LP (Reorganization Transactions) (Details) - MPLX LP - USD ($) shares in Millions, $ in Millions |
Sep. 01, 2016 |
Mar. 31, 2016 |
Dec. 01, 2014 |
|---|---|---|---|
| Noncontrolling Interest [Line Items] | |||
| General partners' contributed capital | $ 225 | ||
| Limited Partner | |||
| Noncontrolling Interest [Line Items] | |||
| Units issued, number of units | 7.0 | 23.0 | 2.9 |
| General Partner and Limited Partner | |||
| Noncontrolling Interest [Line Items] | |||
| Increase in ownership percentage by MPC | 1.00% |
MPLX LP (Private Placement of Preferred Units) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
May 13, 2016 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Noncontrolling Interest [Line Items] | ||||
| Issuance of MPLX LP redeemable preferred units | $ 984 | $ 0 | $ 0 | |
| Series A Convertible Preferred Units | MPLX LP | ||||
| Noncontrolling Interest [Line Items] | ||||
| Preferred units, dividend rate, percentage | 6.50% | |||
| Issuance of MPLX LP redeemable preferred units | $ 984 | |||
| Preferred units, dividend rate, per-dollar-amount | $ 0.528125 | |||
| Preferred units, description | The MPLX Preferred Units are convertible into MPLX common units on a one for one basis after three years, at the purchasers’ option, and after four years at MPLX’s option, subject to certain conditions. | |||
| Series A Convertible Preferred Units | Preferred Units | MPLX LP | ||||
| Noncontrolling Interest [Line Items] | ||||
| Sale of units (number of units) | 30.8 | |||
| Units issued, price per share | $ 32.50 | |||
MPLX LP (Dropdowns to MPLX) (Details) - USD ($) shares in Thousands, $ in Millions |
12 Months Ended | |||||
|---|---|---|---|---|---|---|
Sep. 01, 2016 |
Mar. 31, 2016 |
Dec. 04, 2015 |
Dec. 01, 2014 |
Mar. 01, 2014 |
Dec. 31, 2016 |
|
| MPLX LP | Limited Partner | ||||||
| Noncontrolling Interest [Line Items] | ||||||
| Units issued, number of units | 7,000 | 23,000 | 2,900 | |||
| Equity interest issued, value assigned | $ 600 | $ 200 | ||||
| MPLX LP | General Partner | ||||||
| Noncontrolling Interest [Line Items] | ||||||
| Units issued, number of units | 460 | |||||
| MPLX LP | MPLX Revolver | ||||||
| Noncontrolling Interest [Line Items] | ||||||
| Cash payment for acquisition | $ 600 | $ 270 | ||||
| MPLX LP | Cash and cash equivalents | ||||||
| Noncontrolling Interest [Line Items] | ||||||
| Cash payment for acquisition | $ 40 | |||||
| MPLX Pipe Line Holdings LP | ||||||
| Noncontrolling Interest [Line Items] | ||||||
| Additional interest sold | 0.50% | 30.50% | 13.00% | |||
| Proceeds from sale of ownership interest in assets sold by company in affiliate | $ 12 | $ 600 | $ 310 | |||
| MPLX Pipe Line Holdings LP | MPLX LP | ||||||
| Noncontrolling Interest [Line Items] | ||||||
| Ownership interest (in percentage) | 100.00% | 100.00% |
MPLX LP (Public Offerings) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions |
12 Months Ended | ||||||
|---|---|---|---|---|---|---|---|
Feb. 12, 2015 |
Dec. 08, 2014 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 22, 2015 |
Dec. 14, 2015 |
|
| Noncontrolling Interest [Line Items] | |||||||
| Issuance of MPLX LP common units | $ 776 | $ 0 | $ 221 | ||||
| Senior Notes | |||||||
| Noncontrolling Interest [Line Items] | |||||||
| Debt instrument, face amount | $ 1,500 | ||||||
| MPLX LP | |||||||
| Noncontrolling Interest [Line Items] | |||||||
| Issuance of MPLX LP common units | $ 221 | ||||||
| MPLX LP | Senior Notes | |||||||
| Noncontrolling Interest [Line Items] | |||||||
| Debt instrument, face amount | $ 4,040 | ||||||
| MPLX LP | Senior Notes | MPLX senior notes, 4.000%, due February 2025 | |||||||
| Noncontrolling Interest [Line Items] | |||||||
| Debt instrument, face amount | $ 500 | ||||||
| Debt instrument, interest rate | 4.00% | 4.00% | |||||
| Debt instrument, maturity date | Feb. 15, 2025 | Feb. 15, 2025 | |||||
| MPLX LP | Limited Partner | |||||||
| Noncontrolling Interest [Line Items] | |||||||
| Public offering of common units (in number of common units) | 3.5 | ||||||
| Units issued, price per share | $ 66.68 | ||||||
MPLX LP (ATM Program) (Details) - USD ($) shares in Millions, $ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
Dec. 08, 2014 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Noncontrolling Interest [Line Items] | ||||
| Issuance of MPLX LP common units | $ 776 | $ 0 | $ 221 | |
| MPLX LP | ||||
| Noncontrolling Interest [Line Items] | ||||
| Issuance of MPLX LP common units | $ 221 | |||
| MPLX LP | ATM Program | ||||
| Noncontrolling Interest [Line Items] | ||||
| Issuance of MPLX LP common units | 776 | |||
| Remaining authorized issuance amount | $ 717 | |||
| MPLX LP | ATM Program | Limited Partners Common Units | ||||
| Noncontrolling Interest [Line Items] | ||||
| Sale of units (number of units) | 26 | |||
MPLX LP (Noncontrolling Interest) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Impact from equity transactions of MPLX | $ 658 | $ 6,923 | $ 221 |
| Additional Paid-in Capital | |||
| Increase (decrease) in MPC's paid in capital for the issuance of MPLX LP common units to the public | (60) | 1,532 | |
| Increase in MPC's paid in capital for the issuance of MPLX LP common units and general partner units to MPC | 121 | 0 | |
| Net transfers (to) from noncontrolling interests | 61 | 1,532 | |
| Tax impact | (118) | (404) | |
| Impact from equity transactions of MPLX | $ (57) | $ 1,128 | |
Acquisitions and Investments (Fair Value of Consideration Transferred - MarkWest) (Details) - USD ($) $ in Millions |
1 Months Ended | 12 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|---|
Dec. 04, 2015 |
Jul. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
||||
| Business Acquisition [Line Items] | |||||||||
| Fair value of MPLX units issued | $ 0 | $ 7,326 | [1] | $ 0 | |||||
| Payable to seller | $ 50 | ||||||||
| MarkWest | |||||||||
| Business Acquisition [Line Items] | |||||||||
| Fair value of MPLX units issued | $ 7,326 | ||||||||
| Cash payment to MarkWest unitholders | 1,230 | $ 1,280 | |||||||
| Payable to seller | 50 | $ 25 | |||||||
| Total fair value of consideration transferred | $ 8,606 | ||||||||
| |||||||||
Acquisitions and Investments (Schedule of Assets Acquired and Liabilities Assumed - MarkWest) (Details) - USD ($) $ in Millions |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 04, 2015 |
Dec. 31, 2014 |
||
|---|---|---|---|---|---|---|
| Business Acquisition [Line Items] | ||||||
| Goodwill | $ 3,587 | $ 4,019 | $ 1,566 | |||
| MarkWest | ||||||
| Business Acquisition [Line Items] | ||||||
| Cash and cash equivalents | $ 12 | |||||
| Receivables | 164 | |||||
| Inventories | 32 | |||||
| Other current assets | 44 | |||||
| Equity method investments | 2,600 | |||||
| Property, plant and equipment, net | 8,517 | |||||
| Other noncurrent assets | 538 | |||||
| Total assets acquired | 11,907 | |||||
| Accounts payable | 328 | |||||
| Payroll and benefits payable | 13 | |||||
| Accrued taxes | 21 | |||||
| Other current liabilities | 44 | |||||
| Long-term debt | 4,567 | |||||
| Deferred income taxes | 377 | |||||
| Deferred credits and other liabilities | 151 | |||||
| Noncontrolling interests | 13 | |||||
| Total liabilities and noncontrolling interest assumed | 5,514 | |||||
| Net assets acquired excluding goodwill | 6,393 | |||||
| Goodwill | 2,213 | |||||
| Net assets acquired | 8,606 | |||||
| MarkWest | Scenario, Previously Reported | ||||||
| Business Acquisition [Line Items] | ||||||
| Cash and cash equivalents | 12 | |||||
| Receivables | 164 | |||||
| Inventories | 33 | |||||
| Other current assets | 44 | |||||
| Equity method investments | 2,457 | |||||
| Property, plant and equipment, net | 8,474 | |||||
| Other noncurrent assets | 473 | |||||
| Total assets acquired | 11,657 | |||||
| Accounts payable | 322 | |||||
| Payroll and benefits payable | 13 | |||||
| Accrued taxes | 21 | |||||
| Other current liabilities | 44 | |||||
| Long-term debt | 4,567 | |||||
| Deferred income taxes | 374 | |||||
| Deferred credits and other liabilities | 151 | |||||
| Noncontrolling interests | 13 | |||||
| Total liabilities and noncontrolling interest assumed | 5,505 | |||||
| Net assets acquired excluding goodwill | 6,152 | |||||
| Goodwill | 2,454 | |||||
| Net assets acquired | 8,606 | |||||
| MarkWest | Scenario, Adjustment | ||||||
| Business Acquisition [Line Items] | ||||||
| Cash and cash equivalents | 0 | |||||
| Receivables | 0 | |||||
| Inventories | (1) | |||||
| Other current assets | 0 | |||||
| Equity method investments | 143 | |||||
| Property, plant and equipment, net | 43 | |||||
| Other noncurrent assets | [1] | 65 | ||||
| Total assets acquired | 250 | |||||
| Accounts payable | 6 | |||||
| Payroll and benefits payable | 0 | |||||
| Accrued taxes | 0 | |||||
| Other current liabilities | 0 | |||||
| Long-term debt | 0 | |||||
| Deferred income taxes | 3 | |||||
| Deferred credits and other liabilities | 0 | |||||
| Noncontrolling interests | 0 | |||||
| Total liabilities and noncontrolling interest assumed | 9 | |||||
| Net assets acquired excluding goodwill | 241 | |||||
| Goodwill | (241) | |||||
| Net assets acquired | $ 0 | |||||
| ||||||
Acquisitions and Investments (Revenues and Earnings of MarkWest Included in Consolidated Statements of Income) (Details) - MarkWest $ in Millions |
12 Months Ended |
|---|---|
|
Dec. 31, 2015
USD ($)
| |
| Business Acquisition [Line Items] | |
| Sales and other operating revenues (including consumer excise taxes) | $ 120 |
| Income from operations | $ 32 |
Acquisitions and Investments (Acquisition of Hess' Retail Operations and Related Assets) (Details) bbl / d in Thousands, $ in Millions |
Sep. 30, 2014
USD ($)
bbl / d
|
Dec. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
Dec. 31, 2014
USD ($)
|
|---|---|---|---|---|
| Business Acquisition [Line Items] | ||||
| Goodwill | $ 3,587 | $ 4,019 | $ 1,566 | |
| Hess Retail Operations and Related Assets | ||||
| Business Acquisition [Line Items] | ||||
| Allocation of space on Colonial Pipeline (in barrels per day) | bbl / d | 40 | |||
| Cash payment for acquisition | $ 2,820 | |||
| Net working capital adjustment | (3) | |||
| Goodwill | 629 | |||
| Transaction costs | $ 14 |
Acquisitions and Investments (Revenues and Earnings of Hess Retail Included in Consolidated Statement of Income) (Details) - Hess Retail Operations and Related Assets $ in Millions |
12 Months Ended |
|---|---|
|
Dec. 31, 2014
USD ($)
| |
| Business Acquisition [Line Items] | |
| Sales and other operating revenues (including consumer excise taxes) | $ 2,403 |
| Income from operations | $ 113 |
Acquisitions and Investments (Schedule of Acquisition Related Pro Forma Financial Information (Details) - USD ($) $ / shares in Units, $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Business Combinations [Abstract] | ||
| Sales and other operating revenues (including consumer excise taxes) | $ 73,760 | $ 108,605 |
| Net income attributable to MPC | $ 2,825 | $ 2,522 |
| Net income attributable to MPC per share – basic | $ 5.25 | $ 4.42 |
| Net income attributable to MPC per share – diluted | $ 5.21 | $ 4.39 |
Acquisitions and Investments (Acquisition of Biodiesel Facility) (Details) - Felda Iffco Sdn Bhd gallons_per_year in Millions, $ in Millions |
1 Months Ended | |
|---|---|---|
|
Apr. 30, 2014
USD ($)
|
Apr. 01, 2014
gallons_per_year
|
|
| Business Acquisition [Line Items] | ||
| Cash payment for acquisition | $ | $ 40 | |
| Plant capacity volume | gallons_per_year | 60 |
Acquisitions and Investments (Formation of Travel Plaza Joint Venture) (Details) $ in Millions |
12 Months Ended | ||||||
|---|---|---|---|---|---|---|---|
|
Dec. 31, 2016
USD ($)
Store
|
Dec. 31, 2015
USD ($)
|
Dec. 31, 2014
USD ($)
|
|||||
| Schedule of Equity Method Investments [Line Items] | |||||||
| Contribution of fixed assets to joint venture | $ 272 | [1] | $ 0 | $ 0 | |||
| PFJ Southeast | |||||||
| Schedule of Equity Method Investments [Line Items] | |||||||
| Convenience stores | Store | 123 | ||||||
| Contribution of fixed assets to joint venture | [1] | $ 272 | |||||
| PFJ Southeast | Property, Plant and Equipment | |||||||
| Schedule of Equity Method Investments [Line Items] | |||||||
| Contribution of fixed assets to joint venture | [1] | 203 | |||||
| PFJ Southeast | Goodwill | |||||||
| Schedule of Equity Method Investments [Line Items] | |||||||
| Contribution of fixed assets to joint venture | [1] | 61 | |||||
| PFJ Southeast | Inventories | |||||||
| Schedule of Equity Method Investments [Line Items] | |||||||
| Contribution of fixed assets to joint venture | [1] | $ 8 | |||||
| PFJ Southeast | Speedway | |||||||
| Schedule of Equity Method Investments [Line Items] | |||||||
| Convenience stores | Store | 41 | ||||||
| PFJ Southeast | Pilot Flying J | |||||||
| Schedule of Equity Method Investments [Line Items] | |||||||
| Convenience stores | Store | 82 | ||||||
| |||||||
Acquisitions and Investments (Marine Investments) (Details) $ in Millions |
1 Months Ended | 12 Months Ended | 16 Months Ended | ||
|---|---|---|---|---|---|
|
May 31, 2016
USD ($)
|
Dec. 31, 2016
Joint_venture
vessel
|
Dec. 31, 2015
vessel
|
Dec. 31, 2016
USD ($)
Joint_venture
vessel
|
Sep. 30, 2015 |
|
| Crowley Coastal Partners | |||||
| Schedule of Equity Method Investments [Line Items] | |||||
| Equity method investments, ownership percentage | 50.00% | 50.00% | 50.00% | ||
| Cash paid to acquire equity method investments | $ | $ 48 | $ 189 | |||
| Crowley Ocean Partners | |||||
| Schedule of Equity Method Investments [Line Items] | |||||
| Equity method investments, ownership percentage | 50.00% | 50.00% | 50.00% | 50.00% | |
| Number of vessels | vessel | 2 | 2 | 4 | ||
| Cash paid to acquire equity method investments | $ | $ 141 | ||||
| Crowley Blue Water Partners | |||||
| Schedule of Equity Method Investments [Line Items] | |||||
| Equity method investments, ownership percentage | 50.00% | 50.00% | |||
| Number of vessels | vessel | 3 | ||||
| Crowley Maritime Corporation | |||||
| Schedule of Equity Method Investments [Line Items] | |||||
| Number of joint ventures | Joint_venture | 2 | 2 | |||
Acquisitions and Investments (Investments in Pipeline Companies) (Details) bbl / d in Thousands, $ in Millions |
12 Months Ended | 18 Months Ended | 38 Months Ended | |||
|---|---|---|---|---|---|---|
|
Feb. 15, 2017
USD ($)
bbl / d
|
Mar. 04, 2014
USD ($)
|
Dec. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
Dec. 31, 2016
USD ($)
|
Jan. 01, 2019 |
|
| Explorer | ||||||
| Schedule of Equity Method Investments [Line Items] | ||||||
| Cash paid to acquire equity method investments | $ 77 | |||||
| Equity method investments, ownership percentage | 25.00% | 25.00% | 25.00% | |||
| Ownership percentage acquired | 7.00% | |||||
| Illinois Extension Pipeline | ||||||
| Schedule of Equity Method Investments [Line Items] | ||||||
| Cash paid to acquire equity method investments | $ 299 | |||||
| Equity method investments, ownership percentage | 35.00% | 35.00% | ||||
| North Dakota Pipeline | ||||||
| Schedule of Equity Method Investments [Line Items] | ||||||
| Cash paid to acquire equity method investments | $ 14 | $ 301 | ||||
| Equity method investments, ownership percentage | 37.50% | 37.50% | ||||
| North Dakota Pipeline Class A Units | Scenario, Forecast | ||||||
| Schedule of Equity Method Investments [Line Items] | ||||||
| Equity method investments, ownership percentage | 27.00% | |||||
| Subsequent Event | MarEn Bakken Company LLC | MPLX LP | ||||||
| Schedule of Equity Method Investments [Line Items] | ||||||
| Cash paid to acquire equity method investments | $ 500 | |||||
| Equity method investments, ownership percentage | 25.00% | |||||
| Subsequent Event | MarEn Bakken Company LLC | MPLX & Enbridge Energy Partners | ||||||
| Schedule of Equity Method Investments [Line Items] | ||||||
| Cash paid to acquire equity method investments | $ 2,000 | |||||
| Subsequent Event | Bakken Pipeline System | ||||||
| Schedule of Equity Method Investments [Line Items] | ||||||
| Crude oil throughput | bbl / d | 470 | |||||
| Subsequent Event | Bakken Pipeline System | MPLX LP | ||||||
| Schedule of Equity Method Investments [Line Items] | ||||||
| Equity method investments, ownership percentage | 9.20% | |||||
| Subsequent Event | Bakken Pipeline System | MPLX & Enbridge Energy Partners | ||||||
| Schedule of Equity Method Investments [Line Items] | ||||||
| Percentage of ownership interest in joint venture acquired | 36.75% |
Variable Interest Entities (Details) - USD ($) $ in Millions |
Dec. 31, 2016 |
May 31, 2016 |
|---|---|---|
| Crowley Coastal Partners | ||
| Schedule of Equity Method Investments [Line Items] | ||
| Maximum loss exposure, amount | $ 489 | |
| Equity method investments, ownership percentage | 50.00% | 50.00% |
| MarkWest Utica EMG | ||
| Schedule of Equity Method Investments [Line Items] | ||
| Maximum loss exposure, amount | $ 2,220 | |
| Equity method investments, ownership percentage | 56.00% | |
| Ohio Gathering | ||
| Schedule of Equity Method Investments [Line Items] | ||
| Equity method investments, ownership percentage | 34.00% |
Related Party Transactions (Narrative) (Detail) - USD ($) $ in Millions |
Dec. 31, 2016 |
May 31, 2016 |
Dec. 31, 2015 |
Sep. 30, 2015 |
Mar. 04, 2014 |
|---|---|---|---|---|---|
| Related Party Transaction [Line Items] | |||||
| Long-term receivable from related party | $ 1 | $ 1 | |||
| Centennial | |||||
| Related Party Transaction [Line Items] | |||||
| Equity method investments, ownership percentage | 50.00% | ||||
| Crowley Blue Water Partners | |||||
| Related Party Transaction [Line Items] | |||||
| Equity method investments, ownership percentage | 50.00% | ||||
| Crowley Ocean Partners | |||||
| Related Party Transaction [Line Items] | |||||
| Equity method investments, ownership percentage | 50.00% | 50.00% | 50.00% | ||
| Explorer | |||||
| Related Party Transaction [Line Items] | |||||
| Equity method investments, ownership percentage | 25.00% | 25.00% | |||
| Illinois Extension Pipeline | |||||
| Related Party Transaction [Line Items] | |||||
| Equity method investments, ownership percentage | 35.00% | ||||
| LOCAP | |||||
| Related Party Transaction [Line Items] | |||||
| Equity method investments, ownership percentage | 59.00% | ||||
| LOOP | |||||
| Related Party Transaction [Line Items] | |||||
| Equity method investments, ownership percentage | 51.00% | ||||
| MarkWest Utica EMG | |||||
| Related Party Transaction [Line Items] | |||||
| Equity method investments, ownership percentage | 56.00% | ||||
| Ohio Condensate | |||||
| Related Party Transaction [Line Items] | |||||
| Equity method investments, ownership percentage | 60.00% | ||||
| Ohio Gathering | |||||
| Related Party Transaction [Line Items] | |||||
| Equity method investments, ownership percentage | 34.00% | ||||
| PFJ Southeast | |||||
| Related Party Transaction [Line Items] | |||||
| Equity method investments, ownership percentage | 29.00% | ||||
| TAAE | |||||
| Related Party Transaction [Line Items] | |||||
| Equity method investments, ownership percentage | 45.00% | ||||
| TACE | |||||
| Related Party Transaction [Line Items] | |||||
| Equity method investments, ownership percentage | 61.00% | ||||
| TAME | |||||
| Related Party Transaction [Line Items] | |||||
| Equity method investments, ownership percentage | 67.00% |
Related Party Transactions (Sales to Related Parties) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Related Party Transaction [Line Items] | |||
| Revenue from Related Parties | $ 62 | $ 6 | $ 7 |
| PFJ Southeast | |||
| Related Party Transaction [Line Items] | |||
| Revenue from Related Parties | 56 | 0 | 0 |
| Other equity method investees | |||
| Related Party Transaction [Line Items] | |||
| Revenue from Related Parties | $ 6 | $ 6 | $ 7 |
Related Party Transactions (Other Income) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Related Party Transaction [Line Items] | |||
| Other income from related parties | $ 41 | $ 4 | $ 1 |
| MarkWest Utica EMG | |||
| Related Party Transaction [Line Items] | |||
| Other income from related parties | 16 | 0 | 0 |
| Ohio Condensate | |||
| Related Party Transaction [Line Items] | |||
| Other income from related parties | 4 | 0 | 0 |
| Ohio Gathering | |||
| Related Party Transaction [Line Items] | |||
| Other income from related parties | 15 | 2 | 0 |
| Other equity method investees | |||
| Related Party Transaction [Line Items] | |||
| Other income from related parties | $ 6 | $ 2 | $ 1 |
Related Party Transactions (Purchases From Related Parties) (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Related Party Transaction [Line Items] | |||
| Purchases from related parties | $ 509 | $ 308 | $ 505 |
| Crowley Blue Water Partners | |||
| Related Party Transaction [Line Items] | |||
| Purchases from related parties | 37 | 0 | 0 |
| Crowley Ocean Partners | |||
| Related Party Transaction [Line Items] | |||
| Purchases from related parties | 52 | 6 | 0 |
| Explorer | |||
| Related Party Transaction [Line Items] | |||
| Purchases from related parties | 14 | 20 | 39 |
| Illinois Extension Pipeline | |||
| Related Party Transaction [Line Items] | |||
| Purchases from related parties | 110 | 4 | 0 |
| LOCAP | |||
| Related Party Transaction [Line Items] | |||
| Purchases from related parties | 23 | 23 | 21 |
| LOOP | |||
| Related Party Transaction [Line Items] | |||
| Purchases from related parties | 59 | 52 | 88 |
| TAAE | |||
| Related Party Transaction [Line Items] | |||
| Purchases from related parties | 41 | 52 | 79 |
| TACE | |||
| Related Party Transaction [Line Items] | |||
| Purchases from related parties | 59 | 54 | 121 |
| TAME | |||
| Related Party Transaction [Line Items] | |||
| Purchases from related parties | 93 | 87 | 141 |
| Other equity method investees | |||
| Related Party Transaction [Line Items] | |||
| Purchases from related parties | $ 21 | $ 10 | $ 16 |
Related Party Transactions (Receivables From Related Parties) (Detail) - USD ($) $ in Millions |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Related Party Transaction [Line Items] | ||
| Current receivables from related parties | $ 45 | $ 13 |
| Centennial | ||
| Related Party Transaction [Line Items] | ||
| Current receivables from related parties | 0 | 1 |
| MarkWest Utica EMG | ||
| Related Party Transaction [Line Items] | ||
| Current receivables from related parties | 2 | 1 |
| Ohio Condensate | ||
| Related Party Transaction [Line Items] | ||
| Current receivables from related parties | 0 | 3 |
| Ohio Gathering | ||
| Related Party Transaction [Line Items] | ||
| Current receivables from related parties | 2 | 5 |
| PFJ Southeast | ||
| Related Party Transaction [Line Items] | ||
| Current receivables from related parties | 40 | 0 |
| Other equity method investees | ||
| Related Party Transaction [Line Items] | ||
| Current receivables from related parties | $ 1 | $ 3 |
Related Party Transactions (Payables To Related Parties) (Detail) - USD ($) $ in Millions |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Related Party Transaction [Line Items] | ||
| Payables to related parties | $ 53 | $ 42 |
| Explorer | ||
| Related Party Transaction [Line Items] | ||
| Payables to related parties | 0 | 1 |
| Illinois Extension Pipeline | ||
| Related Party Transaction [Line Items] | ||
| Payables to related parties | 9 | 4 |
| LOCAP | ||
| Related Party Transaction [Line Items] | ||
| Payables to related parties | 2 | 2 |
| LOOP | ||
| Related Party Transaction [Line Items] | ||
| Payables to related parties | 6 | 5 |
| MarkWest Utica EMG | ||
| Related Party Transaction [Line Items] | ||
| Payables to related parties | 24 | 19 |
| Ohio Condensate | ||
| Related Party Transaction [Line Items] | ||
| Payables to related parties | 1 | 4 |
| TAAE | ||
| Related Party Transaction [Line Items] | ||
| Payables to related parties | 2 | 1 |
| TACE | ||
| Related Party Transaction [Line Items] | ||
| Payables to related parties | 4 | 2 |
| TAME | ||
| Related Party Transaction [Line Items] | ||
| Payables to related parties | 4 | 3 |
| Other equity method investees | ||
| Related Party Transaction [Line Items] | ||
| Payables to related parties | $ 1 | $ 1 |
Income per Common Share (Summary Of Earnings Per Common Share) (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions |
3 Months Ended | 12 Months Ended | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2016 |
Sep. 30, 2016 |
Jun. 30, 2016 |
Mar. 31, 2016 |
Dec. 31, 2015 |
Sep. 30, 2015 |
Jun. 30, 2015 |
Mar. 31, 2015 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
||||
| Basic earnings per share: | ||||||||||||||
| Net income attributable to MPC | $ 227 | $ 145 | $ 801 | $ 1 | $ 187 | $ 948 | $ 826 | $ 891 | $ 1,174 | $ 2,852 | $ 2,524 | |||
| Income allocated to participating securities, basic | 1 | 4 | 4 | |||||||||||
| Income available to common stockholders – basic | $ 1,173 | $ 2,848 | $ 2,520 | |||||||||||
| Weighted average common shares outstanding (in shares) | 528 | 538 | 570 | |||||||||||
| Basic (in USD per share) | $ 0.43 | $ 0.28 | $ 1.51 | $ 0.003 | $ 0.35 | $ 1.77 | $ 1.52 | $ 1.63 | [1] | $ 2.22 | $ 5.29 | $ 4.42 | ||
| Diluted earnings per share: | ||||||||||||||
| Net income attributable to MPC | $ 227 | $ 145 | $ 801 | $ 1 | $ 187 | $ 948 | $ 826 | $ 891 | $ 1,174 | $ 2,852 | $ 2,524 | |||
| Income allocated to participating securities, diluted | 1 | 4 | 4 | |||||||||||
| Income available to common stockholders – diluted | $ 1,173 | $ 2,848 | $ 2,520 | |||||||||||
| Weighted average common shares outstanding (in shares) | 528 | 538 | 570 | |||||||||||
| Effect of dilutive securities (in shares) | 2 | 4 | 4 | |||||||||||
| Weighted average common shares, including dilutive effect (in shares) | 530 | 542 | 574 | |||||||||||
| Diluted (in USD per share) | $ 0.43 | $ 0.27 | $ 1.51 | $ 0.003 | $ 0.35 | $ 1.76 | $ 1.51 | $ 1.62 | [1] | $ 2.21 | $ 5.26 | $ 4.39 | ||
| ||||||||||||||
Income Per Common Share (Anti-dilutive Shares) (Detail) - shares shares in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Shares issued under stock-based compensation plans | |||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | |||
| Antidilutive securities excluded from computation of earnings per share, amount | 3 | 1 | 1 |
Equity (Narrative) (Detail) $ in Millions |
Dec. 31, 2016
USD ($)
|
|---|---|
| Equity [Abstract] | |
| Stock repurchase plan remaining authorized amount | $ 2,560 |
Equity (Share Repurchases) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Equity [Abstract] | |||
| Number of shares repurchased | 4 | 19 | 49 |
| Cash paid for shares repurchased | $ 197 | $ 965 | $ 2,131 |
| Effective average cost per delivered share | $ 41.84 | $ 50.31 | $ 44.31 |
Segment Information (Narrative) (Detail) - Segment |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Segment Reporting Information [Line Items] | |||
| Number of reportable segments | 3 | ||
| None | Maximum | |||
| Segment Reporting Information [Line Items] | |||
| Percent of annual revenues | 10.00% | 10.00% | 10.00% |
Segment Information (Income From Operations Attributable To Operating Segments) (Detail) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 04, 2015 |
Sep. 30, 2014 |
Dec. 31, 2016 |
Sep. 30, 2016 |
Jun. 30, 2016 |
Mar. 31, 2016 |
Dec. 31, 2015 |
Sep. 30, 2015 |
Jun. 30, 2015 |
Mar. 31, 2015 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|||||||||||||||||||||
| Segment Reporting Information [Line Items] | |||||||||||||||||||||||||||||||||
| Sales and other operating revenues (including consumer excise taxes) | $ 63,339 | $ 72,051 | $ 97,817 | ||||||||||||||||||||||||||||||
| Income from operations | $ 553 | $ 435 | $ 1,315 | $ 75 | $ 338 | $ 1,549 | $ 1,335 | $ 1,470 | 2,378 | 4,692 | 4,051 | ||||||||||||||||||||||
| Income from equity method investments | (185) | 88 | 153 | ||||||||||||||||||||||||||||||
| Depreciation and amortization | 2,001 | 1,502 | 1,326 | ||||||||||||||||||||||||||||||
| Segment capital expenditures and investments | 3,069 | 16,283 | 4,738 | ||||||||||||||||||||||||||||||
| Inventory market valuation adjustment | (370) | 370 | 0 | ||||||||||||||||||||||||||||||
| MarkWest | |||||||||||||||||||||||||||||||||
| Segment Reporting Information [Line Items] | |||||||||||||||||||||||||||||||||
| Transaction costs | $ 6 | ||||||||||||||||||||||||||||||||
| Hess Retail Operations and Related Assets | |||||||||||||||||||||||||||||||||
| Segment Reporting Information [Line Items] | |||||||||||||||||||||||||||||||||
| Segment capital expenditures and investments | 2,710 | ||||||||||||||||||||||||||||||||
| Transaction costs | $ 14 | ||||||||||||||||||||||||||||||||
| Refining & Marketing | |||||||||||||||||||||||||||||||||
| Segment Reporting Information [Line Items] | |||||||||||||||||||||||||||||||||
| Sales and other operating revenues (including consumer excise taxes) | 43,228 | 52,174 | 80,821 | ||||||||||||||||||||||||||||||
| Inventory market valuation adjustment | [1] | (345) | 345 | ||||||||||||||||||||||||||||||
| Speedway | |||||||||||||||||||||||||||||||||
| Segment Reporting Information [Line Items] | |||||||||||||||||||||||||||||||||
| Sales and other operating revenues (including consumer excise taxes) | 18,283 | 19,690 | 16,927 | ||||||||||||||||||||||||||||||
| Inventory market valuation adjustment | [1] | (25) | 25 | ||||||||||||||||||||||||||||||
| Midstream | |||||||||||||||||||||||||||||||||
| Segment Reporting Information [Line Items] | |||||||||||||||||||||||||||||||||
| Sales and other operating revenues (including consumer excise taxes) | 1,828 | 187 | 71 | ||||||||||||||||||||||||||||||
| Midstream | MarkWest | |||||||||||||||||||||||||||||||||
| Segment Reporting Information [Line Items] | |||||||||||||||||||||||||||||||||
| Transaction costs | 36 | ||||||||||||||||||||||||||||||||
| Reportable Segment | |||||||||||||||||||||||||||||||||
| Segment Reporting Information [Line Items] | |||||||||||||||||||||||||||||||||
| Sales and other operating revenues (including consumer excise taxes) | 63,339 | 72,051 | 97,819 | ||||||||||||||||||||||||||||||
| Intersegment Eliminations | |||||||||||||||||||||||||||||||||
| Segment Reporting Information [Line Items] | |||||||||||||||||||||||||||||||||
| Sales and other operating revenues (including consumer excise taxes) | 11,400 | 12,804 | 11,670 | ||||||||||||||||||||||||||||||
| Intersegment Eliminations | Refining & Marketing | |||||||||||||||||||||||||||||||||
| Segment Reporting Information [Line Items] | |||||||||||||||||||||||||||||||||
| Sales and other operating revenues (including consumer excise taxes) | [2] | 10,589 | 12,024 | 10,912 | |||||||||||||||||||||||||||||
| Intersegment Eliminations | Speedway | |||||||||||||||||||||||||||||||||
| Segment Reporting Information [Line Items] | |||||||||||||||||||||||||||||||||
| Sales and other operating revenues (including consumer excise taxes) | [2] | 3 | 3 | 5 | |||||||||||||||||||||||||||||
| Intersegment Eliminations | Midstream | |||||||||||||||||||||||||||||||||
| Segment Reporting Information [Line Items] | |||||||||||||||||||||||||||||||||
| Sales and other operating revenues (including consumer excise taxes) | [2] | 808 | 777 | 753 | |||||||||||||||||||||||||||||
| Operating Segments | |||||||||||||||||||||||||||||||||
| Segment Reporting Information [Line Items] | |||||||||||||||||||||||||||||||||
| Sales and other operating revenues (including consumer excise taxes) | 74,739 | 84,855 | 109,489 | ||||||||||||||||||||||||||||||
| Income from operations | 3,148 | 5,139 | 4,424 | ||||||||||||||||||||||||||||||
| Income from equity method investments | 171 | [3] | 88 | 153 | |||||||||||||||||||||||||||||
| Depreciation and amortization | [3] | 1,941 | 1,450 | 1,274 | |||||||||||||||||||||||||||||
| Segment capital expenditures and investments | 2,925 | 16,091 | 4,628 | ||||||||||||||||||||||||||||||
| Operating Segments | Refining & Marketing | |||||||||||||||||||||||||||||||||
| Segment Reporting Information [Line Items] | |||||||||||||||||||||||||||||||||
| Sales and other operating revenues (including consumer excise taxes) | 53,817 | 64,198 | 91,733 | ||||||||||||||||||||||||||||||
| Income from operations | 1,543 | [4] | 4,086 | [4] | 3,538 | ||||||||||||||||||||||||||||
| Income from equity method investments | 24 | 26 | 96 | ||||||||||||||||||||||||||||||
| Depreciation and amortization | 1,092 | 1,052 | 1,020 | ||||||||||||||||||||||||||||||
| Segment capital expenditures and investments | [5] | 1,101 | 1,045 | 1,043 | [6] | ||||||||||||||||||||||||||||
| Operating Segments | Refining & Marketing | Hess Retail Operations and Related Assets | |||||||||||||||||||||||||||||||||
| Segment Reporting Information [Line Items] | |||||||||||||||||||||||||||||||||
| Segment capital expenditures and investments | 52 | ||||||||||||||||||||||||||||||||
| Operating Segments | Speedway | |||||||||||||||||||||||||||||||||
| Segment Reporting Information [Line Items] | |||||||||||||||||||||||||||||||||
| Sales and other operating revenues (including consumer excise taxes) | 18,286 | 19,693 | 16,932 | ||||||||||||||||||||||||||||||
| Income from operations | 734 | [4] | 673 | [4] | 544 | ||||||||||||||||||||||||||||
| Income from equity method investments | 5 | 0 | 0 | ||||||||||||||||||||||||||||||
| Depreciation and amortization | 273 | 254 | 152 | ||||||||||||||||||||||||||||||
| Segment capital expenditures and investments | [5] | 303 | 501 | 2,981 | [6] | ||||||||||||||||||||||||||||
| Operating Segments | Speedway | Hess Retail Operations and Related Assets | |||||||||||||||||||||||||||||||||
| Segment Reporting Information [Line Items] | |||||||||||||||||||||||||||||||||
| Segment capital expenditures and investments | $ 2,660 | ||||||||||||||||||||||||||||||||
| Operating Segments | Midstream | |||||||||||||||||||||||||||||||||
| Segment Reporting Information [Line Items] | |||||||||||||||||||||||||||||||||
| Sales and other operating revenues (including consumer excise taxes) | 2,636 | 964 | 824 | ||||||||||||||||||||||||||||||
| Income from operations | [7] | 871 | 380 | 342 | |||||||||||||||||||||||||||||
| Income from equity method investments | 142 | 62 | 57 | ||||||||||||||||||||||||||||||
| Depreciation and amortization | 576 | 144 | 102 | ||||||||||||||||||||||||||||||
| Segment capital expenditures and investments | [5] | 1,521 | 14,545 | [8] | 604 | ||||||||||||||||||||||||||||
| Operating Segments | Midstream | MarkWest | |||||||||||||||||||||||||||||||||
| Segment Reporting Information [Line Items] | |||||||||||||||||||||||||||||||||
| Segment capital expenditures and investments | $ 13,850 | ||||||||||||||||||||||||||||||||
| Operating Segments | Midstream | MPLX LP | |||||||||||||||||||||||||||||||||
| Segment Reporting Information [Line Items] | |||||||||||||||||||||||||||||||||
| Cost of services, overhead | $ 11 | $ 20 | $ 19 | ||||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||||||
Segment Information (Reconciliation Of Segment Income From Operations To Income Before Income Taxes) (Detail) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2016 |
Sep. 30, 2016 |
Jun. 30, 2016 |
Mar. 31, 2016 |
Dec. 31, 2015 |
Sep. 30, 2015 |
Jun. 30, 2015 |
Mar. 31, 2015 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
||||||||||
| Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] | ||||||||||||||||||||
| Income from operations | $ 553 | $ 435 | $ 1,315 | $ 75 | $ 338 | $ 1,549 | $ 1,335 | $ 1,470 | $ 2,378 | $ 4,692 | $ 4,051 | |||||||||
| Net interest and other financial income (costs) | 556 | 318 | 216 | |||||||||||||||||
| Income before income taxes | 1,822 | 4,374 | 3,835 | |||||||||||||||||
| Operating Segments | ||||||||||||||||||||
| Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] | ||||||||||||||||||||
| Income from operations | 3,148 | 5,139 | 4,424 | |||||||||||||||||
| Corporate and Other | ||||||||||||||||||||
| Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] | ||||||||||||||||||||
| Income from operations | [1] | (277) | (299) | (277) | ||||||||||||||||
| Segment Reconciling Items | ||||||||||||||||||||
| Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] | ||||||||||||||||||||
| Pension settlement expenses | [2] | (7) | (4) | (96) | ||||||||||||||||
| Impairment | $ (486) | [3] | $ (144) | [3] | $ 0 | |||||||||||||||
| ||||||||||||||||||||
Segment Information (Reconciliation Of Segment Capital Expenditures And Investments To Total Capital Expenditures) (Detail) - USD ($) $ in Millions |
12 Months Ended | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|||||||||||
| Segment Reporting, Other Significant Reconciling Item [Line Items] | |||||||||||||
| Segment capital expenditures and investments | $ 3,069 | $ 16,283 | $ 4,738 | ||||||||||
| Plus items not allocated to segments: | |||||||||||||
| Total capital expenditures | [1] | 2,638 | 13,495 | 4,325 | |||||||||
| Scenario, Adjustment | MarkWest | |||||||||||||
| Segment Reporting, Other Significant Reconciling Item [Line Items] | |||||||||||||
| Cash paid to acquire equity method investments | 143 | ||||||||||||
| Scenario, Previously Reported | MarkWest | |||||||||||||
| Segment Reporting, Other Significant Reconciling Item [Line Items] | |||||||||||||
| Cash paid to acquire equity method investments | 2,460 | ||||||||||||
| Operating Segments | |||||||||||||
| Segment Reporting, Other Significant Reconciling Item [Line Items] | |||||||||||||
| Segment capital expenditures and investments | 2,925 | 16,091 | 4,628 | ||||||||||
| Cash paid to acquire equity method investments | 431 | 2,788 | [2] | 413 | |||||||||
| Corporate and Other | |||||||||||||
| Segment Reporting, Other Significant Reconciling Item [Line Items] | |||||||||||||
| Segment capital expenditures and investments | [3],[4] | 144 | 192 | 110 | |||||||||
| Plus items not allocated to segments: | |||||||||||||
| Corporate and Other | 81 | 155 | 83 | ||||||||||
| Capitalized interest | $ 63 | $ 37 | $ 27 | ||||||||||
| |||||||||||||
Segment Information (Reconciliation Of Total Segment Customer Revenues To Sales And Other Operating Revenues) (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Segment Reporting, Revenue Reconciling Item [Line Items] | |||
| Sales and other operating revenues (including consumer excise taxes) | $ 63,339 | $ 72,051 | $ 97,817 |
| Corporate and Other | |||
| Segment Reporting, Revenue Reconciling Item [Line Items] | |||
| Sales and other operating revenues (including consumer excise taxes) | 0 | 0 | (2) |
| Reportable Segment | |||
| Segment Reporting, Revenue Reconciling Item [Line Items] | |||
| Sales and other operating revenues (including consumer excise taxes) | $ 63,339 | $ 72,051 | $ 97,819 |
Segment Information (Schedule Of Revenues By Product Line) (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Segment Reporting Information [Line Items] | |||
| Sales and other operating revenues (including consumer excise taxes) | $ 63,339 | $ 72,051 | $ 97,817 |
| Refined products | |||
| Segment Reporting Information [Line Items] | |||
| Sales and other operating revenues (including consumer excise taxes) | 54,511 | 63,744 | 90,702 |
| Merchandise | |||
| Segment Reporting Information [Line Items] | |||
| Sales and other operating revenues (including consumer excise taxes) | 5,297 | 5,188 | 3,817 |
| Crude oil and refinery feedstocks | |||
| Segment Reporting Information [Line Items] | |||
| Sales and other operating revenues (including consumer excise taxes) | 2,038 | 2,718 | 2,917 |
| Service, transportation and other | |||
| Segment Reporting Information [Line Items] | |||
| Sales and other operating revenues (including consumer excise taxes) | $ 1,493 | $ 401 | $ 381 |
Segment Information (Total Assets By Reportable Segment) (Detail) - USD ($) $ in Millions |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Segment Reporting, Asset Reconciling Item [Line Items] | ||
| Total consolidated assets | $ 44,413 | $ 43,115 |
| Operating Segments | Refining & Marketing | ||
| Segment Reporting, Asset Reconciling Item [Line Items] | ||
| Total consolidated assets | 18,039 | 17,379 |
| Operating Segments | Speedway | ||
| Segment Reporting, Asset Reconciling Item [Line Items] | ||
| Total consolidated assets | 5,426 | 5,349 |
| Operating Segments | Midstream | ||
| Segment Reporting, Asset Reconciling Item [Line Items] | ||
| Total consolidated assets | 18,078 | 17,462 |
| Corporate and Other | ||
| Segment Reporting, Asset Reconciling Item [Line Items] | ||
| Total consolidated assets | $ 2,870 | $ 2,925 |
Other Items (Net Interest And Other Financial Income (Costs)) (Detail) - USD ($) $ in Millions |
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 04, 2015 |
|||||||
| Interest income | $ 6 | $ 6 | $ 7 | |||||||
| Interest expense | (602) | [1] | (325) | [1] | (229) | |||||
| Interest capitalized | 64 | 37 | 27 | |||||||
| Loss on extinguishment of debt | 0 | (5) | 0 | |||||||
| Other financial costs | (24) | (31) | [2] | (21) | ||||||
| Net interest and other financial income (costs) | (556) | (318) | $ (216) | |||||||
| MarkWest | ||||||||||
| Transaction costs | $ 6 | |||||||||
| MarkWest | MPLX LP | Senior Notes | ||||||||||
| Amortization of debt discount | $ 44 | $ 1 | ||||||||
| ||||||||||
Income Taxes (Components Of Income Tax Provisions (Benefits)) (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Current | |||
| Federal | $ 189 | $ 1,210 | $ 1,382 |
| State and local | 27 | 152 | 135 |
| Foreign | (1) | 10 | 5 |
| Total | 215 | 1,372 | 1,522 |
| Deferred | |||
| Federal | 336 | 134 | (199) |
| State and local | 57 | 9 | (37) |
| Foreign | 1 | (9) | (6) |
| Total | 394 | 134 | (242) |
| Total | |||
| Federal | 525 | 1,344 | 1,183 |
| State and local | 84 | 161 | 98 |
| Foreign | 0 | 1 | (1) |
| Total | $ 609 | $ 1,506 | $ 1,280 |
Income Taxes (Narrative) (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Income Tax Disclosure [Abstract] | |||
| Statutory rate applied to income before income taxes | 35.00% | 35.00% | 35.00% |
| Tax effect of issuance of MPLX LP units - MarkWest Merger | $ 115 | ||
| Unrecognized tax benefits that would impact effective income tax rate | 2 | ||
| Uncertain tax positions, reasonably possible increase or decrease during the next twelve months | 1 | ||
| Unrecognized tax benefits income tax net penalties and interest expense (benefits) | (5) | $ 3 | $ 1 |
| Interest and penalties accrued | $ 13 | $ 18 | |
Income Taxes (Reconciliation Of Federal Statutory Income Tax Rate) (Detail) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Income Tax Disclosure [Abstract] | |||
| Statutory rate applied to income before income taxes | 35.00% | 35.00% | 35.00% |
| State and local income taxes, net of federal income tax effects | 3.00% | 2.00% | 2.00% |
| Domestic manufacturing deduction | (1.00%) | (2.00%) | (2.00%) |
| Noncontrolling interests | (1.00%) | (0.00%) | (0.00%) |
| Biodiesel excise tax credit | (1.00%) | (1.00%) | (0.00%) |
| Other | (2.00%) | 0.00% | (2.00%) |
| Provision for income taxes | 33.00% | 34.00% | 33.00% |
Income Taxes (Components Of Deferred Tax Assets And Liabilities) (Detail) - USD ($) $ in Millions |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Deferred tax assets: | ||
| Employee benefits | $ 578 | $ 631 |
| Environmental | 34 | 44 |
| Net operating loss carryforwards | 23 | 73 |
| Other | 58 | 73 |
| Total deferred tax assets | 693 | 821 |
| Deferred tax liabilities: | ||
| Property, plant and equipment | 2,591 | 2,512 |
| Inventories | 707 | 579 |
| Investments in subsidiaries and affiliates | 1,145 | 909 |
| Other | 94 | 89 |
| Total deferred tax liabilities | 4,537 | 4,089 |
| Net deferred tax liabilities | $ 3,844 | $ 3,268 |
Income Taxes (Components Of Net Deferred Tax Liabilities Classified In Consolidated Balance Sheets (Detail) - USD ($) $ in Millions |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Assets | ||
| Other noncurrent assets | $ 17 | $ 17 |
| Liabilities | ||
| Deferred income taxes | 3,861 | 3,285 |
| Net deferred tax liabilities | $ 3,844 | $ 3,268 |
Income Taxes (Tax Carryforwards) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 04, 2015 |
|
| United States Federal | |||
| Operating Loss Carryforwards [Line Items] | |||
| Operating loss carryforwards | $ 18 | $ 66 | |
| United States Federal | Minimum | |||
| Operating Loss Carryforwards [Line Items] | |||
| Operating loss carryforwards, expiration date | Jan. 01, 2022 | ||
| United States Federal | Maximum | |||
| Operating Loss Carryforwards [Line Items] | |||
| Operating loss carryforwards, expiration date | Dec. 31, 2036 | ||
| States | |||
| Operating Loss Carryforwards [Line Items] | |||
| Operating loss carryforwards | $ 8 | $ 10 | |
| States | Minimum | |||
| Operating Loss Carryforwards [Line Items] | |||
| Operating loss carryforwards, expiration date | Jan. 01, 2017 | ||
| States | Maximum | |||
| Operating Loss Carryforwards [Line Items] | |||
| Operating loss carryforwards, expiration date | Dec. 31, 2036 |
Income Taxes (Valuation Allowances) (Details) - USD ($) $ in Millions |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Income Tax Disclosure [Abstract] | ||
| Valuation allowance | $ 10 | $ 5 |
Income Taxes (Summary Of Income Tax Returns Subject To Examination) (Detail) |
12 Months Ended |
|---|---|
Dec. 31, 2016 | |
| United States Federal | Minimum | |
| Income Tax Examination [Line Items] | |
| Tax years | 2010 |
| United States Federal | Maximum | |
| Income Tax Examination [Line Items] | |
| Tax years | 2015 |
| States | Minimum | |
| Income Tax Examination [Line Items] | |
| Tax years | 2008 |
| States | Maximum | |
| Income Tax Examination [Line Items] | |
| Tax years | 2015 |
Income Taxes (Summary Of Activity In Unrecognized Tax Benefits) (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] | |||
| January 1 balance | $ 12 | $ 12 | $ 13 |
| Additions for tax positions of prior years | 6 | 0 | 7 |
| Reductions for tax positions of prior years | (10) | 0 | (10) |
| Settlements, decrease | (1) | ||
| Settlements, increase | 0 | 2 | |
| December 31 balance | $ 7 | $ 12 | $ 12 |
Inventories (Summary Of Inventories) (Detail) - USD ($) $ in Millions |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Inventory Disclosure [Abstract] | ||
| Crude oil and refinery feedstocks | $ 2,208 | $ 2,180 |
| Refined products | 2,810 | 2,804 |
| Materials and supplies | 485 | 438 |
| Merchandise | 153 | 173 |
| Lower of cost or market reserve | 0 | (370) |
| Total | $ 5,656 | $ 5,225 |
Inventories (Narrative) (Detail) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|
Dec. 31, 2016 |
Jun. 30, 2016 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Inventory Disclosure [Abstract] | |||||
| Total inventory LIFO percentage | 91.00% | 91.00% | 91.00% | ||
| Lower of cost or market reserve | $ 0 | $ 0 | $ 370 | ||
| Inventory market valuation adjustment | 370 | (370) | $ 0 | ||
| Excess of current acquisition costs over stated LIFO value | 308 | 308 | |||
| Effect of LIFO inventory liquidation on income | $ 54 | $ (54) | $ 0 | $ (78) | $ 0 |
Equity Method Investments (Schedule Of Equity Method Investments) (Detail) - USD ($) $ in Millions |
12 Months Ended | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2016 |
May 31, 2016 |
Dec. 31, 2015 |
Sep. 30, 2015 |
Mar. 04, 2014 |
||||||||||
| Schedule of Equity Method Investments [Line Items] | ||||||||||||||
| Equity method investments | $ 3,827 | $ 3,622 | ||||||||||||
| MPLX LP | ||||||||||||||
| Schedule of Equity Method Investments [Line Items] | ||||||||||||||
| Equity method investments | $ 2,467 | 2,458 | ||||||||||||
| Centennial | ||||||||||||||
| Schedule of Equity Method Investments [Line Items] | ||||||||||||||
| Equity method investments, ownership percentage | 50.00% | |||||||||||||
| Equity method investments | $ 35 | 37 | ||||||||||||
| Centrahoma Processing LLC | ||||||||||||||
| Schedule of Equity Method Investments [Line Items] | ||||||||||||||
| Equity method investments, ownership percentage | 40.00% | |||||||||||||
| Equity method investments | $ 104 | 111 | ||||||||||||
| Crowley Coastal Partners | ||||||||||||||
| Schedule of Equity Method Investments [Line Items] | ||||||||||||||
| Equity method investments, ownership percentage | 50.00% | 50.00% | ||||||||||||
| Equity method investments | $ 184 | 0 | ||||||||||||
| Crowley Ocean Partners | ||||||||||||||
| Schedule of Equity Method Investments [Line Items] | ||||||||||||||
| Equity method investments, ownership percentage | 50.00% | 50.00% | 50.00% | |||||||||||
| Equity method investments | $ 0 | [1] | 72 | |||||||||||
| Explorer | ||||||||||||||
| Schedule of Equity Method Investments [Line Items] | ||||||||||||||
| Equity method investments, ownership percentage | 25.00% | 25.00% | ||||||||||||
| Equity method investments | $ 94 | 91 | ||||||||||||
| Illinois Extension Pipeline | ||||||||||||||
| Schedule of Equity Method Investments [Line Items] | ||||||||||||||
| Equity method investments, ownership percentage | 35.00% | |||||||||||||
| Equity method investments | $ 293 | 267 | ||||||||||||
| LOCAP | ||||||||||||||
| Schedule of Equity Method Investments [Line Items] | ||||||||||||||
| Equity method investments, ownership percentage | 59.00% | |||||||||||||
| Equity method investments | $ 22 | 22 | ||||||||||||
| LOOP | ||||||||||||||
| Schedule of Equity Method Investments [Line Items] | ||||||||||||||
| Equity method investments, ownership percentage | 51.00% | |||||||||||||
| Equity method investments | $ 277 | 243 | ||||||||||||
| MarkWest Utica EMG | ||||||||||||||
| Schedule of Equity Method Investments [Line Items] | ||||||||||||||
| Equity method investments, ownership percentage | 56.00% | |||||||||||||
| Equity method investments | $ 2,224 | 2,160 | ||||||||||||
| North Dakota Pipeline | ||||||||||||||
| Schedule of Equity Method Investments [Line Items] | ||||||||||||||
| Income (loss) from equity method investments from asset impairment | $ (267) | |||||||||||||
| Equity method investments, ownership percentage | 37.50% | |||||||||||||
| Equity method investments | $ 30 | [2] | 287 | |||||||||||
| Ohio Condensate | ||||||||||||||
| Schedule of Equity Method Investments [Line Items] | ||||||||||||||
| Income (loss) from equity method investments from asset impairment | $ (89) | |||||||||||||
| Equity method investments, ownership percentage | 60.00% | |||||||||||||
| Equity method investments | $ 10 | [2] | 101 | |||||||||||
| PFJ Southeast | ||||||||||||||
| Schedule of Equity Method Investments [Line Items] | ||||||||||||||
| Equity method investments, ownership percentage | 29.00% | |||||||||||||
| Equity method investments | $ 283 | [3] | 0 | |||||||||||
| TAAE | ||||||||||||||
| Schedule of Equity Method Investments [Line Items] | ||||||||||||||
| Equity method investments, ownership percentage | 45.00% | |||||||||||||
| Equity method investments | $ 33 | 27 | ||||||||||||
| TACE | ||||||||||||||
| Schedule of Equity Method Investments [Line Items] | ||||||||||||||
| Equity method investments, ownership percentage | 61.00% | |||||||||||||
| Equity method investments | $ 33 | 49 | ||||||||||||
| TAEI | ||||||||||||||
| Schedule of Equity Method Investments [Line Items] | ||||||||||||||
| Equity method investments, ownership percentage | 34.00% | |||||||||||||
| Equity method investments | $ 15 | 18 | ||||||||||||
| TAME | ||||||||||||||
| Schedule of Equity Method Investments [Line Items] | ||||||||||||||
| Equity method investments, ownership percentage | 67.00% | |||||||||||||
| TAME | Direct Ownership Interest | ||||||||||||||
| Schedule of Equity Method Investments [Line Items] | ||||||||||||||
| Equity method investments, ownership percentage | 50.00% | |||||||||||||
| Equity method investments | [4] | $ 18 | 27 | |||||||||||
| Other equity method investees | ||||||||||||||
| Schedule of Equity Method Investments [Line Items] | ||||||||||||||
| Equity method investments | 43 | 24 | ||||||||||||
| Other equity method investees | MPLX LP | ||||||||||||||
| Schedule of Equity Method Investments [Line Items] | ||||||||||||||
| Equity method investments | $ 129 | $ 86 | ||||||||||||
| ||||||||||||||
Equity Method Investments (Summarized Financial Information For Equity Method Investees) (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Income statement data: | |||
| Revenues and other income | $ 2,421 | $ 1,390 | $ 1,430 |
| Income (loss) from operations | (116) | 332 | 379 |
| Net income (loss) | (250) | 239 | $ 316 |
| Balance sheet data – December 31: | |||
| Current assets | 711 | 906 | |
| Noncurrent assets | 8,170 | 6,418 | |
| Current liabilities | 884 | 468 | |
| Noncurrent liabilities | $ 1,462 | $ 1,130 | |
Equity Method Investments (Narrative) (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Schedule of Equity Method Investments [Line Items] | |||
| Equity method investment difference between carrying amount and underlying equity | $ 1,210 | ||
| Equity method investment difference between carrying amount and underlying equity, portion related to goodwill which is not being amortized | 553 | ||
| Equity method investments | 3,827 | $ 3,622 | |
| Dividends and partnership distributions received from equity method investees | 291 | 113 | $ 170 |
| Centennial | |||
| Schedule of Equity Method Investments [Line Items] | |||
| Equity method investments | $ 35 | $ 37 | |
| Percent of debt outstanding | 50.00% | ||
| Centennial | Financial Guarantee | |||
| Schedule of Equity Method Investments [Line Items] | |||
| Maximum potential undiscounted payments | $ 29 | ||
Property, Plant And Equipment (Summary Of Property, Plant And Equipment) (Detail) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Property, Plant and Equipment [Line Items] | ||
| Property, plant and equipment, gross | $ 38,006 | $ 35,604 |
| Less accumulated depreciation | 12,241 | 10,440 |
| Net property, plant and equipment | 25,765 | 25,164 |
| Operating Segments | Refining & Marketing | ||
| Property, Plant and Equipment [Line Items] | ||
| Property, plant and equipment, gross | 19,447 | 18,396 |
| Operating Segments | Speedway | ||
| Property, Plant and Equipment [Line Items] | ||
| Property, plant and equipment, gross | 5,078 | 5,067 |
| Operating Segments | Midstream | ||
| Property, Plant and Equipment [Line Items] | ||
| Property, plant and equipment, gross | 12,664 | 11,379 |
| Corporate and Other | ||
| Property, Plant and Equipment [Line Items] | ||
| Property, plant and equipment, gross | $ 817 | $ 762 |
| Minimum | ||
| Property, Plant and Equipment [Line Items] | ||
| Estimated useful lives (in years) | 2 years | |
| Minimum | Operating Segments | Refining & Marketing | ||
| Property, Plant and Equipment [Line Items] | ||
| Estimated useful lives (in years) | 2 years | |
| Minimum | Operating Segments | Speedway | ||
| Property, Plant and Equipment [Line Items] | ||
| Estimated useful lives (in years) | 4 years | |
| Minimum | Operating Segments | Midstream | ||
| Property, Plant and Equipment [Line Items] | ||
| Estimated useful lives (in years) | 3 years | |
| Minimum | Corporate and Other | ||
| Property, Plant and Equipment [Line Items] | ||
| Estimated useful lives (in years) | 4 years | |
| Maximum | ||
| Property, Plant and Equipment [Line Items] | ||
| Estimated useful lives (in years) | 42 years | |
| Maximum | Operating Segments | Refining & Marketing | ||
| Property, Plant and Equipment [Line Items] | ||
| Estimated useful lives (in years) | 30 years | |
| Maximum | Operating Segments | Speedway | ||
| Property, Plant and Equipment [Line Items] | ||
| Estimated useful lives (in years) | 25 years | |
| Maximum | Operating Segments | Midstream | ||
| Property, Plant and Equipment [Line Items] | ||
| Estimated useful lives (in years) | 42 years | |
| Maximum | Corporate and Other | ||
| Property, Plant and Equipment [Line Items] | ||
| Estimated useful lives (in years) | 40 years |
Property, Plant And Equipment (Narrative) (Detail) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2016 |
|
| Property, Plant and Equipment [Line Items] | ||
| Property, plant and equipment, gross | $ 35,604 | $ 38,006 |
| Property, plant and equipment, accumulated depreciation | 10,440 | 12,241 |
| Residual Oil Upgrader Expansion project - Garyville [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Impairment charge | 144 | |
| Assets held under capital leases | ||
| Property, Plant and Equipment [Line Items] | ||
| Property, plant and equipment, gross | 511 | 505 |
| Property, plant and equipment, accumulated depreciation | 176 | 202 |
| Construction in progress | ||
| Property, Plant and Equipment [Line Items] | ||
| Property, plant and equipment, gross | $ 2,260 | $ 2,020 |
Goodwill (Narrative) (Detail) $ in Millions |
3 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|
|
Dec. 31, 2016
USD ($)
|
Mar. 31, 2016
USD ($)
|
Dec. 31, 2016
USD ($)
reporting_unit
|
Dec. 31, 2015
USD ($)
|
Dec. 31, 2014
USD ($)
|
|
| Goodwill [Line Items] | |||||
| Number of reporting units | reporting_unit | 3 | ||||
| Impairment expense | $ 130 | $ 0 | |||
| Number of reporting units impaired | reporting_unit | 2 | ||||
| Fair Value, Measurements, Nonrecurring | |||||
| Goodwill [Line Items] | |||||
| Impairment expense | $ 130 | $ 0 | $ 0 | ||
| Midstream | |||||
| Goodwill [Line Items] | |||||
| Impairment expense | $ 1 | $ 129 | $ 130 | ||
| Midstream | Fair Value, Measurements, Nonrecurring | Goodwill | Minimum | |||||
| Goodwill [Line Items] | |||||
| Discount rate | 10.50% | ||||
| Midstream | Fair Value, Measurements, Nonrecurring | Goodwill | Maximum | |||||
| Goodwill [Line Items] | |||||
| Discount rate | 11.50% | ||||
Goodwill (Changes In Carrying Amount Of Goodwill) (Detail) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2016 |
Mar. 31, 2016 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|||||||
| Goodwill [Line Items] | ||||||||||
| Beginning balance | $ 4,019 | $ 4,019 | $ 1,566 | |||||||
| Goodwill, acquisitions | 2,454 | |||||||||
| Goodwill, purchase price accounting adjustments | (241) | |||||||||
| Goodwill, disposition | (61) | (1) | ||||||||
| Goodwill, impairment | (130) | 0 | ||||||||
| Ending balance | $ 3,587 | 3,587 | 4,019 | |||||||
| Refining & Marketing | ||||||||||
| Goodwill [Line Items] | ||||||||||
| Beginning balance | 539 | 539 | 539 | |||||||
| Goodwill, acquisitions | 0 | |||||||||
| Goodwill, purchase price accounting adjustments | 0 | |||||||||
| Goodwill, disposition | 0 | 0 | ||||||||
| Goodwill, impairment | 0 | |||||||||
| Ending balance | 539 | 539 | 539 | |||||||
| Speedway | ||||||||||
| Goodwill [Line Items] | ||||||||||
| Beginning balance | 853 | 853 | 854 | |||||||
| Goodwill, acquisitions | 0 | |||||||||
| Goodwill, purchase price accounting adjustments | 0 | |||||||||
| Goodwill, disposition | (61) | [1] | (1) | |||||||
| Goodwill, impairment | 0 | |||||||||
| Ending balance | 792 | 792 | 853 | |||||||
| Midstream | ||||||||||
| Goodwill [Line Items] | ||||||||||
| Beginning balance | 2,627 | 2,627 | 173 | |||||||
| Goodwill, acquisitions | [2] | 2,454 | ||||||||
| Goodwill, purchase price accounting adjustments | [2] | (241) | ||||||||
| Goodwill, disposition | 0 | 0 | ||||||||
| Goodwill, impairment | (1) | $ (129) | (130) | |||||||
| Ending balance | $ 2,256 | $ 2,256 | $ 2,627 | |||||||
| ||||||||||
Intangibles (Intangible Assets by Major Class) (Details) - USD ($) $ in Millions |
Dec. 31, 2016 |
Dec. 31, 2015 |
|||
|---|---|---|---|---|---|
| Acquired Finite-Lived Intangible Assets [Line Items] | |||||
| Gross | $ 924 | $ 856 | |||
| Accumulated amortization | (199) | (137) | |||
| Net | 725 | 719 | |||
| Customer contracts and relationships | |||||
| Acquired Finite-Lived Intangible Assets [Line Items] | |||||
| Gross | 636 | 560 | |||
| Royalty agreements | |||||
| Acquired Finite-Lived Intangible Assets [Line Items] | |||||
| Gross | 128 | 122 | |||
| Favorable lease contract terms | |||||
| Acquired Finite-Lived Intangible Assets [Line Items] | |||||
| Gross | 58 | 71 | |||
| Other intangible assets | |||||
| Acquired Finite-Lived Intangible Assets [Line Items] | |||||
| Gross | 102 | 103 | |||
| Refining & Marketing | |||||
| Acquired Finite-Lived Intangible Assets [Line Items] | |||||
| Gross | 258 | 242 | |||
| Accumulated amortization | (123) | (104) | |||
| Net | 135 | 138 | |||
| Indefinite-lived intangible assets | 3 | 3 | |||
| Refining & Marketing | Customer contracts and relationships | |||||
| Acquired Finite-Lived Intangible Assets [Line Items] | |||||
| Gross | 102 | 91 | |||
| Refining & Marketing | Royalty agreements | |||||
| Acquired Finite-Lived Intangible Assets [Line Items] | |||||
| Gross | 128 | 122 | |||
| Refining & Marketing | Favorable lease contract terms | |||||
| Acquired Finite-Lived Intangible Assets [Line Items] | |||||
| Gross | 1 | 1 | |||
| Refining & Marketing | Other intangible assets | |||||
| Acquired Finite-Lived Intangible Assets [Line Items] | |||||
| Gross | [1] | 27 | 28 | ||
| Speedway | |||||
| Acquired Finite-Lived Intangible Assets [Line Items] | |||||
| Gross | 133 | 146 | |||
| Accumulated amortization | (35) | (31) | |||
| Net | 98 | 115 | |||
| Indefinite-lived intangible assets | 46 | 46 | |||
| Speedway | Customer contracts and relationships | |||||
| Acquired Finite-Lived Intangible Assets [Line Items] | |||||
| Gross | 1 | 1 | |||
| Speedway | Royalty agreements | |||||
| Acquired Finite-Lived Intangible Assets [Line Items] | |||||
| Gross | 0 | 0 | |||
| Speedway | Favorable lease contract terms | |||||
| Acquired Finite-Lived Intangible Assets [Line Items] | |||||
| Gross | 57 | 70 | |||
| Speedway | Other intangible assets | |||||
| Acquired Finite-Lived Intangible Assets [Line Items] | |||||
| Gross | [1] | 75 | 75 | ||
| Midstream | |||||
| Acquired Finite-Lived Intangible Assets [Line Items] | |||||
| Gross | 533 | 468 | |||
| Accumulated amortization | (41) | (2) | |||
| Net | 492 | 466 | |||
| Midstream | Customer contracts and relationships | |||||
| Acquired Finite-Lived Intangible Assets [Line Items] | |||||
| Gross | 533 | 468 | |||
| Midstream | Royalty agreements | |||||
| Acquired Finite-Lived Intangible Assets [Line Items] | |||||
| Gross | 0 | 0 | |||
| Midstream | Favorable lease contract terms | |||||
| Acquired Finite-Lived Intangible Assets [Line Items] | |||||
| Gross | 0 | 0 | |||
| Midstream | Other intangible assets | |||||
| Acquired Finite-Lived Intangible Assets [Line Items] | |||||
| Gross | $ 0 | $ 0 | |||
| |||||
Intangibles (Narrative) (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Goodwill and Intangible Assets Disclosure [Abstract] | ||
| Amortization expense | $ 50 | $ 29 |
Intangibles (Estimated Future Amortization Expense) (Details) $ in Millions |
Dec. 31, 2016
USD ($)
|
|---|---|
| Goodwill and Intangible Assets Disclosure [Abstract] | |
| 2017 | $ 49 |
| 2018 | 49 |
| 2018 | 49 |
| 2019 | 48 |
| 2020 | $ 46 |
Fair Value Measurements (Assets And Liabilities Accounted For At Fair Value On Recurring Basis) (Detail) - USD ($) $ in Millions |
Dec. 31, 2016 |
Dec. 31, 2015 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||||||||||
| Cash collateral netted with derivative liabilities | $ 24 | ||||||||||
| Cash collateral netted with derivative assets | $ (23) | ||||||||||
| Contingent consideration, current | 130 | 196 | |||||||||
| Embedded derivative in commodity contracts | |||||||||||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||||||||||
| Embedded derivative instruments, current | 13 | 5 | |||||||||
| Fair Value, Measurements, Recurring | |||||||||||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||||||||||
| Commodity derivative instruments, assets - collateral and netting | (688) | (62) | |||||||||
| Commodity derivative instruments, assets - collateral pledged not offset | 126 | 0 | |||||||||
| Other assets | 2 | 2 | |||||||||
| Total assets at fair value | 2 | 53 | |||||||||
| Commodity derivative instruments, liabilities - netting and collateral | (712) | (39) | |||||||||
| Commodity derivative instruments, liabilities - collateral pledged not offset | 0 | 0 | |||||||||
| Contingent consideration, liability | [1] | 130 | 317 | ||||||||
| Total liabilities at fair value | 190 | 349 | |||||||||
| Fair Value, Measurements, Recurring | Level 1 | |||||||||||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||||||||||
| Other assets | 2 | 2 | |||||||||
| Total assets at fair value | 690 | 106 | |||||||||
| Contingent consideration, liability | 0 | 0 | |||||||||
| Total liabilities at fair value | 712 | 39 | |||||||||
| Fair Value, Measurements, Recurring | Level 2 | |||||||||||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||||||||||
| Other assets | 0 | 0 | |||||||||
| Total assets at fair value | 0 | 2 | |||||||||
| Contingent consideration, liability | 0 | 0 | |||||||||
| Total liabilities at fair value | 0 | 0 | |||||||||
| Fair Value, Measurements, Recurring | Level 3 | |||||||||||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||||||||||
| Other assets | 0 | 0 | |||||||||
| Total assets at fair value | 0 | 7 | |||||||||
| Contingent consideration, liability | 130 | 317 | |||||||||
| Total liabilities at fair value | 190 | 349 | |||||||||
| Fair Value, Measurements, Recurring | Commodity derivative instruments | |||||||||||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||||||||||
| Commodity derivative instruments, assets - collateral and netting | [2] | (688) | (62) | ||||||||
| Commodity derivative instruments, assets - net | [3] | 0 | 51 | ||||||||
| Commodity derivative instruments, assets - collateral pledged not offset | 126 | 0 | |||||||||
| Commodity derivative instruments, liabilities - netting and collateral | [2] | (712) | (39) | ||||||||
| Commodity derivative instruments, liabilities, net | [3] | 6 | 0 | ||||||||
| Commodity derivative instruments, liabilities - collateral pledged not offset | 0 | 0 | |||||||||
| Fair Value, Measurements, Recurring | Commodity derivative instruments | Level 1 | |||||||||||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||||||||||
| Commodity derivative instruments, assets - gross | 688 | 104 | |||||||||
| Commodity derivative instruments, liabilities - gross | 712 | 39 | |||||||||
| Fair Value, Measurements, Recurring | Commodity derivative instruments | Level 2 | |||||||||||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||||||||||
| Commodity derivative instruments, assets - gross | 0 | 2 | |||||||||
| Commodity derivative instruments, liabilities - gross | 0 | 0 | |||||||||
| Fair Value, Measurements, Recurring | Commodity derivative instruments | Level 3 | |||||||||||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||||||||||
| Commodity derivative instruments, assets - gross | 0 | 7 | |||||||||
| Commodity derivative instruments, liabilities - gross | 6 | 0 | |||||||||
| Fair Value, Measurements, Recurring | Embedded derivative in commodity contracts | |||||||||||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||||||||||
| Commodity derivative instruments, liabilities - netting and collateral | [2] | 0 | 0 | ||||||||
| Commodity derivative instruments, liabilities, net | [3],[4] | 54 | 32 | ||||||||
| Commodity derivative instruments, liabilities - collateral pledged not offset | 0 | 0 | |||||||||
| Fair Value, Measurements, Recurring | Embedded derivative in commodity contracts | Level 1 | |||||||||||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||||||||||
| Commodity derivative instruments, liabilities - gross | 0 | 0 | |||||||||
| Fair Value, Measurements, Recurring | Embedded derivative in commodity contracts | Level 2 | |||||||||||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||||||||||
| Commodity derivative instruments, liabilities - gross | 0 | 0 | |||||||||
| Fair Value, Measurements, Recurring | Embedded derivative in commodity contracts | Level 3 | |||||||||||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||||||||||
| Commodity derivative instruments, liabilities - gross | $ 54 | $ 32 | |||||||||
| |||||||||||
Fair Value Measurements (Recurring Narrative) (Detail) |
12 Months Ended | 30 Months Ended | ||
|---|---|---|---|---|
|
Dec. 31, 2016
USD ($)
$ / bbl
|
Dec. 31, 2015
USD ($)
|
Dec. 31, 2016
USD ($)
|
Feb. 01, 2013
USD ($)
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||
| Contractual commitments to acquire property, plant and equipment and advance funds to equity method investees | $ 899,000,000 | $ 1,600,000,000 | ||
| Galveston Bay Refinery and Related Assets | ||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||
| Maximum earnout payment, year four | $ 250,000,000 | |||
| Maximum earnout payment, year five | 250,000,000 | |||
| Maximum earnout payment, year six | 250,000,000 | |||
| Maximum earnout provision payable to the company | $ 700,000,000 | |||
| Cash payment for acquisition | $ 569,000,000 | |||
| Contractual commitments to acquire property, plant and equipment and advance funds to equity method investees | $ 131,000,000 | $ 331,000,000 | 131,000,000 | |
| Fair Value, Measurements, Recurring | Galveston Bay Refinery and Related Assets | ||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||
| Range of internal and external crack spread forecast per barrel | $ / bbl | 13 | |||
| Fair Value, Measurements, Recurring | Minimum | Galveston Bay Refinery and Related Assets | ||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||
| Discount rate | 5.00% | |||
| Fair Value, Measurements, Recurring | Maximum | Galveston Bay Refinery and Related Assets | ||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||
| Discount rate | 10.00% | |||
| Embedded derivative in commodity contracts | ||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||
| Embedded derivative renewal term | 5 years | |||
| Level 3 | Commodity derivative instruments | Ethanol prices | Minimum | ||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||
| Forward commodity price | $ 0.28 | 0.28 | ||
| Level 3 | Commodity derivative instruments | Ethanol prices | Maximum | ||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||
| Forward commodity price | $ 1.27 | $ 1.27 | ||
| Level 3 | Embedded derivative in commodity contracts | ||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||
| Probability of renewal | 50.00% | |||
| Probability of renewal second term | 75.00% | |||
Fair Value Measurements (Reconciliation Of Net Beginning And Ending Balances Recorded For Net Assets And Liabilities Classified As Level 3) (Detail) - USD ($) $ in Millions |
12 Months Ended | ||||
|---|---|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|||
| Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | |||||
| Beginning balance | $ 342 | $ 478 | $ 625 | ||
| Contingent consideration payment | [1] | (200) | (189) | (180) | |
| Net derivative positions assumed - MarkWest Merger | 0 | 31 | 0 | ||
| Unrealized and realized losses included in net income | 55 | 20 | 33 | ||
| Settlements of derivative instruments | (7) | 2 | 0 | ||
| Ending balance | 190 | 342 | 478 | ||
| Contingent consideration payment | $ 164 | $ 175 | $ 172 | ||
| |||||
Fair Value Measurements (Gains/Losses Included In Earnings Relating to Assets Still Held at the End of Period) (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |||
| Change in unrealized gain (loss) | $ 45 | $ 21 | $ 33 |
| Derivative | |||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |||
| Change in unrealized gain (loss) | 32 | (7) | 0 |
| Contingent Consideration | |||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |||
| Change in unrealized gain (loss) | $ 13 | $ 28 | $ 33 |
Fair Value Measurements (Assets Measured At Fair Value On Nonrecurring Basis) (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |||
| Goodwill, impairment | $ 130 | $ 0 | |
| Fair Value, Measurements, Nonrecurring | |||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |||
| Equity method investments, fair value | 42 | 0 | $ 0 |
| Equity method investment, impairment | 356 | 0 | 0 |
| Goodwill, fair value | 0 | 0 | 0 |
| Goodwill, impairment | 130 | 0 | 0 |
| Property, plant and equipment, net, fair value | 0 | 0 | 0 |
| Property, plant and equipment, net, impairment | 0 | 144 | 0 |
| Other noncurrent assets, fair value | 0 | 0 | 0 |
| Other noncurrent assets, impairment | $ 0 | $ 0 | $ 11 |
Fair Value Measurements (Nonrecurring Narrative) (Details) - USD ($) $ in Millions |
12 Months Ended | 38 Months Ended | ||
|---|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2016 |
|
| North Dakota Pipeline | ||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||
| Equity method investments, ownership percentage | 37.50% | 37.50% | ||
| Income (loss) from equity method investments | $ (267) | |||
| Cash paid to acquire equity method investments | $ 14 | $ 301 | ||
| Ohio Condensate | ||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||
| Equity method investments, ownership percentage | 60.00% | 60.00% | ||
| Income (loss) from equity method investments | $ (89) | |||
| Ohio Condensate | Equity Method Investments | ||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||
| Discount rate | 11.20% | |||
| Fair Value, Measurements, Nonrecurring | ||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||
| Equity method investment, impairment | $ 356 | $ 0 | $ 0 | |
| Impairment charge | 0 | 144 | 0 | |
| Other noncurrent assets, impairment | 0 | $ 0 | $ 11 | |
| Fair Value, Measurements, Nonrecurring | North Dakota Pipeline | ||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||
| Income (loss) from equity method investments | (267) | |||
| Fair Value, Measurements, Nonrecurring | Ohio Condensate | ||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||
| Income (loss) from equity method investments | (58) | |||
| Equity method investment, impairment | 96 | |||
| Income (loss) from equity method investments from elimination of basis differential | $ (31) | |||
Fair Value Measurements (Financial Instruments At Fair Value, Excluding Derivative Financial Instruments) (Detail) - USD ($) $ in Millions |
Dec. 31, 2016 |
Dec. 31, 2015 |
|||
|---|---|---|---|---|---|
| Fair Value | |||||
| Financial assets: | |||||
| Investments | $ 25 | $ 33 | |||
| Other | 21 | 35 | |||
| Total financial assets | 46 | 68 | |||
| Financial liabilities: | |||||
| Long-term debt | [1] | 10,892 | 11,366 | ||
| Deferred credits and other liabilities | 121 | 136 | |||
| Total financial liabilities | 11,013 | 11,502 | |||
| Carrying Value | |||||
| Financial assets: | |||||
| Investments | 2 | 2 | |||
| Other | 21 | 33 | |||
| Total financial assets | 23 | 35 | |||
| Financial liabilities: | |||||
| Long-term debt | [1] | 10,297 | 11,628 | ||
| Deferred credits and other liabilities | 109 | 135 | |||
| Total financial liabilities | $ 10,406 | $ 11,763 | |||
| |||||
Derivatives (Classification Of Gross Fair Values Of Derivative Instruments, Excluding Cash Collateral) (Detail) - Commodity derivative instruments - USD ($) $ in Millions |
Dec. 31, 2016 |
Dec. 31, 2015 |
|||
|---|---|---|---|---|---|
| Other current assets | |||||
| Derivatives, Fair Value [Line Items] | |||||
| Asset | $ 688 | $ 113 | |||
| Liability | 712 | 39 | |||
| Other current liabilities(a) | |||||
| Derivatives, Fair Value [Line Items] | |||||
| Asset | 0 | 0 | |||
| Liability | [1] | 13 | 5 | ||
| Deferred credits and other liabilities | |||||
| Derivatives, Fair Value [Line Items] | |||||
| Asset | 0 | 0 | |||
| Liability | [1] | $ 47 | $ 27 | ||
| |||||
Derivatives (Open Commodity Derivative Contracts - Crude Oil) (Detail) - Crude Oil bbl in Thousands |
12 Months Ended | |||
|---|---|---|---|---|
|
Dec. 31, 2016
bbl
| ||||
| Exchange Traded | ||||
| Derivative [Line Items] | ||||
| Percentage of derivative contracts expiring in the period | 98.70% | |||
| Derivative contract expiration date | Mar. 31, 2017 | |||
| Exchange Traded | Long | ||||
| Derivative [Line Items] | ||||
| Notional contracts (in thousands of total barrels) | 53,028 | [1] | ||
| Exchange Traded | Short | ||||
| Derivative [Line Items] | ||||
| Notional contracts (in thousands of total barrels) | 52,373 | [1] | ||
| Over the Counter | Short | ||||
| Derivative [Line Items] | ||||
| Notional contracts (in thousands of total barrels) | 37 | |||
| ||||
Derivatives (Open Commodity Derivative Contracts - Natural Gas) (Details) |
Dec. 31, 2016
MMBTU
|
|---|---|
| Over the Counter | Long | |
| Derivative [Line Items] | |
| Notional contracts (in MMbtu) | 297,017 |
Derivatives (Open Commodity Derivative Contracts - Refined Product) (Details) - Refined products gal in Thousands |
12 Months Ended | |||
|---|---|---|---|---|
|
Dec. 31, 2016
gal
| ||||
| Exchange Traded | ||||
| Derivative [Line Items] | ||||
| Percentage of derivative contracts expiring in the period | 100.00% | |||
| Derivative contract expiration date | Mar. 31, 2017 | |||
| Exchange Traded | Long | ||||
| Derivative [Line Items] | ||||
| Notional contracts (in thousands of total gallons) | 196,434 | [1] | ||
| Exchange Traded | Short | ||||
| Derivative [Line Items] | ||||
| Notional contracts (in thousands of total gallons) | 221,970 | [1] | ||
| Over the Counter | Short | ||||
| Derivative [Line Items] | ||||
| Notional contracts (in thousands of total gallons) | 64,212 | |||
| ||||
Derivatives (Effect Of Commodity Derivative Instruments In Statements Of Income) (Detail) - Commodity derivative instruments - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Derivative Instruments, Gain (Loss) [Line Items] | |||
| Gain (Loss) | $ (180) | $ 313 | $ 493 |
| Sales and other operating revenues | |||
| Derivative Instruments, Gain (Loss) [Line Items] | |||
| Gain (Loss) | (13) | 19 | 37 |
| Cost of revenues | |||
| Derivative Instruments, Gain (Loss) [Line Items] | |||
| Gain (Loss) | $ (167) | $ 294 | $ 456 |
Debt (Outstanding Borrowings) (Detail) - USD ($) $ in Millions |
12 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|
Jul. 20, 2016 |
Oct. 27, 2015 |
Feb. 12, 2015 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 22, 2015 |
|||
| Debt Instrument [Line Items] | ||||||||
| Commercial paper | $ 0 | $ 0 | ||||||
| Total | 11,069 | 12,475 | ||||||
| Unamortized debt issuance costs | (44) | (51) | ||||||
| Unamortized discount | [1] | (453) | (499) | |||||
| Amounts due within one year | (28) | (29) | ||||||
| Total long-term debt due after one year | 10,544 | 11,896 | ||||||
| MPLX LP | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Amounts due within one year | (1) | (1) | ||||||
| Total long-term debt due after one year | 4,422 | 5,255 | ||||||
| Senior Notes | MPLX LP | MarkWest | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Long-term debt, gross | 63 | 63 | ||||||
| Unamortized discount | (420) | (464) | ||||||
| Capital Lease Obligations [Member] | Consolidated subsidiaries: | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Capital lease obligations | $ 319 | 348 | ||||||
| Debt instrument maturity year, start | Jan. 01, 2016 | |||||||
| Debt instrument maturity year, end | Dec. 31, 2028 | |||||||
| 364-day bank revolving credit facility due July 2017 | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Line of credit facility, expiration date | Jul. 19, 2017 | |||||||
| 364-day bank revolving credit facility due July 2017 | Line of Credit | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Long-term debt, gross | $ 0 | 0 | ||||||
| Line of credit facility, expiration date | Jul. 19, 2017 | |||||||
| Trade receivables securitization facility due July 2019 | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Line of credit facility, expiration date | Jul. 19, 2019 | |||||||
| Trade receivables securitization facility due July 2019 | Secured Debt | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Long-term debt, gross | $ 0 | 0 | ||||||
| Line of credit facility, expiration date | Jul. 19, 2019 | |||||||
| Bank revolving credit facility due 2020 | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Line of credit facility, expiration date | Jul. 20, 2020 | |||||||
| Bank revolving credit facility due 2020 | Line of Credit | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Long-term debt, gross | $ 0 | 0 | ||||||
| Line of credit facility, expiration date | Jul. 20, 2020 | |||||||
| Term loan agreement due 2019 | Unsecured Debt | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Long-term debt, gross | $ 200 | 700 | ||||||
| Line of credit facility, expiration date | Sep. 30, 2019 | |||||||
| Senior notes, 2.700% due December 2018 | Senior Notes | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Long-term debt, gross | $ 600 | 600 | ||||||
| Debt instrument, maturity date | Dec. 14, 2018 | |||||||
| Debt instrument, interest rate | 2.70% | |||||||
| Senior notes, 3.400% due December 2020 | Senior Notes | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Long-term debt, gross | $ 650 | 650 | ||||||
| Debt instrument, maturity date | Dec. 15, 2020 | |||||||
| Debt instrument, interest rate | 3.40% | |||||||
| Senior notes, 5.125% due March 2021 | Senior Notes | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Long-term debt, gross | $ 1,000 | 1,000 | ||||||
| Debt instrument, maturity date | Mar. 01, 2021 | |||||||
| Debt instrument, interest rate | 5.125% | |||||||
| Senior notes, 3.625%, due September 2024 | Senior Notes | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Long-term debt, gross | $ 750 | 750 | ||||||
| Debt instrument, maturity date | Sep. 15, 2024 | |||||||
| Debt instrument, interest rate | 3.625% | |||||||
| Senior notes, 6.500%, due March 2041 | Senior Notes | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Long-term debt, gross | $ 1,250 | 1,250 | ||||||
| Debt instrument, maturity date | Mar. 01, 2041 | |||||||
| Debt instrument, interest rate | 6.50% | |||||||
| Senior notes, 4.750%, due September 2044 | Senior Notes | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Long-term debt, gross | $ 800 | 800 | ||||||
| Debt instrument, maturity date | Sep. 15, 2044 | |||||||
| Debt instrument, interest rate | 4.75% | |||||||
| Senior notes, 5.850% due December 2045 | Senior Notes | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Long-term debt, gross | $ 250 | 250 | ||||||
| Debt instrument, maturity date | Dec. 15, 2045 | |||||||
| Debt instrument, interest rate | 5.85% | |||||||
| Senior notes, 5.000%, due September 2054 | Senior Notes | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Long-term debt, gross | $ 400 | 400 | ||||||
| Debt instrument, maturity date | Sep. 15, 2054 | |||||||
| Debt instrument, interest rate | 5.00% | |||||||
| MPLX term loan facility due 2019 | Unsecured Debt | MPLX LP | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Long-term debt, gross | $ 250 | 250 | ||||||
| Line of credit facility, expiration date | Nov. 20, 2019 | Nov. 20, 2019 | ||||||
| MPLX bank revolving credit facility due 2020 | Line of Credit | MPLX LP | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Long-term debt, gross | $ 0 | 877 | ||||||
| Line of credit facility, expiration date | Dec. 04, 2020 | Dec. 04, 2020 | ||||||
| MPLX senior notes, 5.500%, due February 2023 | Senior Notes | MPLX LP | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Long-term debt, gross | $ 710 | 710 | $ 710 | |||||
| Debt instrument, maturity date | Feb. 15, 2023 | |||||||
| Debt instrument, interest rate | 5.50% | 5.50% | ||||||
| MPLX senior notes, 5.500%, due February 2023 | Senior Notes | MPLX LP | MarkWest | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Long-term debt, gross | $ 40 | |||||||
| Debt instrument, maturity date | Feb. 15, 2023 | |||||||
| Debt instrument, interest rate | 5.50% | 5.50% | ||||||
| MPLX senior notes, 4.500%, due July 2023 | Senior Notes | MPLX LP | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Long-term debt, gross | $ 989 | 989 | $ 989 | |||||
| Debt instrument, maturity date | Jul. 15, 2023 | |||||||
| Debt instrument, interest rate | 4.50% | 4.50% | ||||||
| MPLX senior notes, 4.500%, due July 2023 | Senior Notes | MPLX LP | MarkWest | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Long-term debt, gross | $ 11 | |||||||
| Debt instrument, maturity date | Jul. 15, 2023 | |||||||
| Debt instrument, interest rate | 4.50% | 4.50% | ||||||
| MPLX senior notes, 4.875%, due December 2024 | Senior Notes | MPLX LP | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Long-term debt, gross | $ 1,149 | 1,149 | $ 1,150 | |||||
| Debt instrument, maturity date | Dec. 01, 2024 | |||||||
| Debt instrument, interest rate | 4.875% | 4.875% | ||||||
| MPLX senior notes, 4.875%, due December 2024 | Senior Notes | MPLX LP | MarkWest | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Long-term debt, gross | $ 1 | |||||||
| Debt instrument, maturity date | Dec. 01, 2024 | |||||||
| Debt instrument, interest rate | 4.875% | 4.875% | ||||||
| MPLX senior notes, 4.000%, due February 2025 | Senior Notes | MPLX LP | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Long-term debt, gross | $ 500 | 500 | ||||||
| Debt instrument, maturity date | Feb. 15, 2025 | Feb. 15, 2025 | ||||||
| Debt instrument, interest rate | 4.00% | 4.00% | ||||||
| MPLX senior notes, 4.875%, due June 2025 | Senior Notes | MPLX LP | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Long-term debt, gross | $ 1,189 | $ 1,189 | $ 1,190 | |||||
| Debt instrument, maturity date | Jun. 01, 2025 | |||||||
| Debt instrument, interest rate | 4.875% | 4.875% | ||||||
| MPLX senior notes, 4.875%, due June 2025 | Senior Notes | MPLX LP | MarkWest | ||||||||
| Debt Instrument [Line Items] | ||||||||
| Long-term debt, gross | $ 11 | |||||||
| Debt instrument, maturity date | Jun. 01, 2025 | |||||||
| Debt instrument, interest rate | 4.875% | 4.875% | ||||||
| ||||||||
Debt (Schedule Of Debt Payments) (Detail) $ in Millions |
Dec. 31, 2016
USD ($)
|
|---|---|
| Debt Disclosure [Abstract] | |
| 2017 | $ 28 |
| 2018 | 630 |
| 2019 | 477 |
| 2019 | 683 |
| 2020 | $ 1,031 |
Debt (Commercial Paper) (Details) - USD ($) $ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
Feb. 26, 2016 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Debt Instrument [Line Items] | ||||
| Commercial paper – issued | $ 1,263 | $ 0 | $ 0 | |
| Commercial paper - repayments | 1,263 | 0 | $ 0 | |
| Commercial paper outstanding | $ 0 | $ 0 | ||
| Commercial Paper | ||||
| Debt Instrument [Line Items] | ||||
| Line of credit facility, maximum borrowing capacity | $ 2,000 | |||
| Debt instrument, term | 397 days | |||
Debt (MPC Revolving Credit Agreement) (Detail) $ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
|
Jul. 20, 2016
USD ($)
Period
|
Dec. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
Dec. 31, 2014
USD ($)
|
|
| Line of Credit Facility [Line Items] | ||||
| Commercial paper – issued | $ 1,263 | $ 0 | $ 0 | |
| Commercial paper - repayments | $ 1,263 | 0 | $ 0 | |
| Bank revolving credit facility due 2020 | ||||
| Line of Credit Facility [Line Items] | ||||
| Debt instrument, term | 4 years | |||
| Line of credit facility, maximum borrowing capacity | $ 2,500 | |||
| Line of credit facility, expiration date | Jul. 20, 2020 | |||
| Number of renewal periods | Period | 2 | |||
| Line of credit facility duration of renewal period | 1 year | |||
| Bank revolving credit facility due 2020 | Line of Credit | ||||
| Line of Credit Facility [Line Items] | ||||
| Line of credit facility, expiration date | Jul. 20, 2020 | |||
| Long-term debt outstanding | $ 0 | 0 | ||
| Bank revolving credit facility due 2020 | Maximum | ||||
| Line of Credit Facility [Line Items] | ||||
| Line of credit facility additional borrowing capacity | $ 500 | |||
| Bank revolving credit facility due 2020 | Letter of Credit | ||||
| Line of Credit Facility [Line Items] | ||||
| Letters of credit outstanding | $ 0 | |||
| Bank revolving credit facility due 2020 | Letter of Credit | Maximum | ||||
| Line of Credit Facility [Line Items] | ||||
| Line of credit facility, current borrowing capacity | 2,000 | |||
| Bank revolving credit facility due 2020 | Bridge Loan | Maximum | ||||
| Line of Credit Facility [Line Items] | ||||
| Line of credit facility, current borrowing capacity | $ 100 | |||
| 364-day bank revolving credit facility due July 2017 | ||||
| Line of Credit Facility [Line Items] | ||||
| Debt instrument, term | 364 days | |||
| Line of credit facility, maximum borrowing capacity | $ 1,000 | |||
| Line of credit facility, expiration date | Jul. 19, 2017 | |||
| 364-day bank revolving credit facility due July 2017 | Line of Credit | ||||
| Line of Credit Facility [Line Items] | ||||
| Line of credit facility, expiration date | Jul. 19, 2017 | |||
| Long-term debt outstanding | $ 0 | $ 0 | ||
| 364-day bank revolving credit facility due July 2017 | Letter of Credit | ||||
| Line of Credit Facility [Line Items] | ||||
| Letters of credit outstanding | $ 0 | |||
| MPC bank revolving credit facilities | ||||
| Line of Credit Facility [Line Items] | ||||
| Debt instrument, description of variable rate basis | at either the Adjusted LIBO Rate (as defined in our revolving credit facilities) plus a margin or the Alternate Base Rate (as defined in our revolving credit facilities), plus a margin | |||
| MPC bank revolving credit facilities | Maximum | ||||
| Line of Credit Facility [Line Items] | ||||
| Ratio of indebtedness to net capital | 0.65 | |||
Debt (Trade Receivables Securitization Facility) (Details) - Trade receivables securitization facility due July 2019 - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Jul. 20, 2016 |
Dec. 31, 2016 |
Jun. 30, 2016 |
|
| Debt Instrument [Line Items] | |||
| Line of credit facility, current borrowing capacity | $ 750 | $ 684 | $ 1,000 |
| Line of credit facility, expiration date | Jul. 19, 2019 | ||
| Line of credit facility, maximum borrowing capacity | $ 750 | ||
| Line of credit facility, borrowings during period | $ 430 | ||
| Line of credit facility, interest rate during period | 1.40% | ||
| Line of credit facility, repayments during period | $ 430 |
Debt (MPC Term Loan) (Details) - MPC Term Loan $ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
|
Sep. 30, 2016
USD ($)
|
Aug. 26, 2014
USD ($)
|
Dec. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
|
| Debt Instrument [Line Items] | ||||
| Line of credit facility, maximum borrowing capacity | $ 700 | |||
| Debt instrument, term | 5 years | |||
| Repayments of long-term debt | $ 500 | |||
| Debt instrument, description of variable rate basis | Adjusted LIBO Rate (as defined in the term loan agreement) plus a margin or the Alternate Base Rate (as defined in the term loan agreement) plus a margin | |||
| Line of credit facility, interest rate during period | 1.60% | |||
| Ratio of indebtedness to net capital | 0.65 | |||
| Unsecured Debt | ||||
| Debt Instrument [Line Items] | ||||
| Long-term debt outstanding | $ 200 | $ 700 |
Debt (MPC Senior Notes) (Details) - USD ($) $ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 14, 2015 |
|
| Debt Instrument [Line Items] | ||||
| Loss on extinguishment of debt | $ 0 | $ 5 | $ 0 | |
| Senior Notes | ||||
| Debt Instrument [Line Items] | ||||
| Debt instrument, face amount | $ 1,500 | |||
| Proceeds from debt | 1,490 | |||
| Senior Notes | Senior notes, 2.700% due December 2018 | ||||
| Debt Instrument [Line Items] | ||||
| Debt instrument, face amount | 600 | |||
| Senior Notes | Senior notes, 3.400% due December 2020 | ||||
| Debt Instrument [Line Items] | ||||
| Debt instrument, face amount | 650 | |||
| Senior Notes | Senior notes, 5.850% due December 2045 | ||||
| Debt Instrument [Line Items] | ||||
| Debt instrument, face amount | $ 250 | |||
| Senior Notes | Senior notes, 3.500%, due March 2016 | ||||
| Debt Instrument [Line Items] | ||||
| Repayments of debt | 750 | |||
| Early repayment of senior debt | $ 763 | |||
Debt (MPLX Credit Agreement) (Details) $ in Millions |
12 Months Ended | ||||||
|---|---|---|---|---|---|---|---|
|
Jul. 20, 2016
USD ($)
|
Dec. 04, 2015
USD ($)
|
Oct. 27, 2015
USD ($)
Period
|
Nov. 21, 2014 |
Dec. 31, 2016
USD ($)
|
Jun. 30, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
|
| MarkWest | |||||||
| Debt Instrument [Line Items] | |||||||
| Line of credit facility, repayments during period | $ 93 | ||||||
| Trade receivables securitization facility due July 2019 | |||||||
| Debt Instrument [Line Items] | |||||||
| Line of credit facility, current borrowing capacity | $ 750 | $ 684 | $ 1,000 | ||||
| Line of credit facility, expiration date | Jul. 19, 2019 | ||||||
| Line of credit facility, maximum borrowing capacity | $ 750 | ||||||
| Line of credit facility, repayments during period | 430 | ||||||
| Line of credit facility, borrowings during period | $ 430 | ||||||
| Line of credit facility, interest rate during period | 1.40% | ||||||
| Trade receivables securitization facility due July 2019 | Letter of Credit | |||||||
| Debt Instrument [Line Items] | |||||||
| Line of credit facility, maximum borrowing capacity | $ 750 | ||||||
| MPLX bank revolving credit facility due 2020 | MarkWest | |||||||
| Debt Instrument [Line Items] | |||||||
| Line of credit facility, repayments during period | 850 | ||||||
| MPLX LP | Line of Credit | MarkWest | |||||||
| Debt Instrument [Line Items] | |||||||
| Line of credit facility, repayments during period | $ 943 | ||||||
| MPLX LP | MPLX bank revolving credit facility due 2020 | |||||||
| Debt Instrument [Line Items] | |||||||
| Line of credit facility, current borrowing capacity | $ 2,000 | ||||||
| Debt instrument, description of variable rate basis | Adjusted LIBO Rate or the Alternate Base Rate (as defined in the MPLX credit agreement) | ||||||
| Line of credit facility, repayments during period | $ 1,310 | ||||||
| Line of credit facility, borrowings during period | $ 434 | ||||||
| Line of credit facility, interest rate during period | 1.90% | ||||||
| Remaining borrowing capacity | $ 2,000 | ||||||
| MPLX LP | MPLX bank revolving credit facility due 2020 | Maximum | |||||||
| Debt Instrument [Line Items] | |||||||
| Line of credit facility additional borrowing capacity | $ 500 | ||||||
| Number of prior quarterly reporting periods covenant | 4 | ||||||
| Covenant ratio debt to EBITDA | 5.0 | ||||||
| Covenant ratio debt to EBITDA post acquisition | 5.5 | ||||||
| MPLX LP | MPLX bank revolving credit facility due 2020 | Letter of Credit | |||||||
| Debt Instrument [Line Items] | |||||||
| Letters of credit outstanding | $ 3 | ||||||
| MPLX LP | MPLX bank revolving credit facility due 2020 | Letter of Credit | Maximum | |||||||
| Debt Instrument [Line Items] | |||||||
| Line of credit facility, current borrowing capacity | $ 250 | ||||||
| MPLX LP | MPLX bank revolving credit facility due 2020 | Bridge Loan | Maximum | |||||||
| Debt Instrument [Line Items] | |||||||
| Line of credit facility, current borrowing capacity | $ 100 | ||||||
| MPLX LP | MPLX bank revolving credit facility due 2020 | Line of Credit | |||||||
| Debt Instrument [Line Items] | |||||||
| Line of credit facility, expiration date | Dec. 04, 2020 | Dec. 04, 2020 | |||||
| Long-term debt outstanding | $ 0 | $ 877 | |||||
| MPLX LP | MPLX term loan facility due 2019 | |||||||
| Debt Instrument [Line Items] | |||||||
| Debt instrument, term | 5 years | ||||||
| Line of credit facility, maximum borrowing capacity | $ 250 | ||||||
| Number of renewal periods | Period | 2 | ||||||
| Line of credit facility duration of renewal period | 1 year | ||||||
| Debt instrument, description of variable rate basis | Adjusted LIBO Rate or the Alternate Base Rate (as defined in the MPLX Credit Agreement) | ||||||
| Line of credit facility, interest rate during period | 2.00% | ||||||
| MPLX LP | MPLX term loan facility due 2019 | Maximum | |||||||
| Debt Instrument [Line Items] | |||||||
| Number of prior quarterly reporting periods covenant | 4 | ||||||
| Covenant ratio debt to EBITDA | 5.0 | ||||||
| Covenant ratio debt to EBITDA post acquisition | 5.5 | ||||||
| MPLX LP | MPLX term loan facility due 2019 | Unsecured Debt | |||||||
| Debt Instrument [Line Items] | |||||||
| Line of credit facility, expiration date | Nov. 20, 2019 | Nov. 20, 2019 | |||||
| Long-term debt outstanding | $ 250 | $ 250 |
Debt (MPLX and MarkWest Senior Notes) (Details) - USD ($) $ in Millions |
12 Months Ended | |||||
|---|---|---|---|---|---|---|
Feb. 12, 2015 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 22, 2015 |
Dec. 14, 2015 |
Dec. 04, 2015 |
|
| MarkWest | ||||||
| Debt Instrument [Line Items] | ||||||
| Long-term debt assumed | $ 4,567 | |||||
| Senior Notes | ||||||
| Debt Instrument [Line Items] | ||||||
| Debt instrument, face amount | $ 1,500 | |||||
| Proceeds from debt | $ 1,490 | |||||
| Senior Notes | MarkWest | ||||||
| Debt Instrument [Line Items] | ||||||
| Long-term debt assumed | $ 4,100 | |||||
| Debt instrument, face amount | $ 4,040 | |||||
| Senior Notes | MPLX LP | ||||||
| Debt Instrument [Line Items] | ||||||
| Debt instrument, face amount | 4,040 | |||||
| Proceeds from debt | 495 | |||||
| Senior Notes | MPLX LP | MarkWest | ||||||
| Debt Instrument [Line Items] | ||||||
| Long-term debt outstanding | $ 63 | 63 | ||||
| Senior Notes | MPLX LP | MPLX senior notes, 5.500%, due February 2023 | ||||||
| Debt Instrument [Line Items] | ||||||
| Long-term debt outstanding | $ 710 | 710 | $ 710 | |||
| Debt instrument, interest rate | 5.50% | 5.50% | ||||
| Debt instrument, maturity date | Feb. 15, 2023 | |||||
| Senior Notes | MPLX LP | MPLX senior notes, 5.500%, due February 2023 | MarkWest | ||||||
| Debt Instrument [Line Items] | ||||||
| Long-term debt outstanding | $ 40 | |||||
| Debt instrument, interest rate | 5.50% | 5.50% | ||||
| Debt instrument, maturity date | Feb. 15, 2023 | |||||
| Senior Notes | MPLX LP | MPLX senior notes, 4.500%, due July 2023 | ||||||
| Debt Instrument [Line Items] | ||||||
| Long-term debt outstanding | $ 989 | 989 | $ 989 | |||
| Debt instrument, interest rate | 4.50% | 4.50% | ||||
| Debt instrument, maturity date | Jul. 15, 2023 | |||||
| Senior Notes | MPLX LP | MPLX senior notes, 4.500%, due July 2023 | MarkWest | ||||||
| Debt Instrument [Line Items] | ||||||
| Long-term debt outstanding | $ 11 | |||||
| Debt instrument, interest rate | 4.50% | 4.50% | ||||
| Debt instrument, maturity date | Jul. 15, 2023 | |||||
| Senior Notes | MPLX LP | MPLX senior notes, 4.875%, due December 2024 | ||||||
| Debt Instrument [Line Items] | ||||||
| Long-term debt outstanding | $ 1,149 | 1,149 | $ 1,150 | |||
| Debt instrument, interest rate | 4.875% | 4.875% | ||||
| Debt instrument, maturity date | Dec. 01, 2024 | |||||
| Senior Notes | MPLX LP | MPLX senior notes, 4.875%, due December 2024 | MarkWest | ||||||
| Debt Instrument [Line Items] | ||||||
| Long-term debt outstanding | $ 1 | |||||
| Debt instrument, interest rate | 4.875% | 4.875% | ||||
| Debt instrument, maturity date | Dec. 01, 2024 | |||||
| Senior Notes | MPLX LP | MPLX senior notes, 4.875%, due June 2025 | ||||||
| Debt Instrument [Line Items] | ||||||
| Long-term debt outstanding | $ 1,189 | 1,189 | $ 1,190 | |||
| Debt instrument, interest rate | 4.875% | 4.875% | ||||
| Debt instrument, maturity date | Jun. 01, 2025 | |||||
| Senior Notes | MPLX LP | MPLX senior notes, 4.875%, due June 2025 | MarkWest | ||||||
| Debt Instrument [Line Items] | ||||||
| Long-term debt outstanding | $ 11 | |||||
| Debt instrument, interest rate | 4.875% | 4.875% | ||||
| Debt instrument, maturity date | Jun. 01, 2025 | |||||
| Senior Notes | MPLX LP | MPLX senior notes, 4.000%, due February 2025 | ||||||
| Debt Instrument [Line Items] | ||||||
| Debt instrument, face amount | $ 500 | |||||
| Long-term debt outstanding | $ 500 | $ 500 | ||||
| Debt instrument, interest rate | 4.00% | 4.00% | ||||
| Debt instrument, maturity date | Feb. 15, 2025 | Feb. 15, 2025 | ||||
Supplemental Cash Flow Information (Summary Of Supplemental Cash Flow Information) (Detail) - USD ($) $ in Millions |
12 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|||||||
| Net cash provided by operating activities included: | |||||||||
| Interest paid (net of amounts capitalized) | $ 478 | $ 272 | $ 166 | ||||||
| Net income taxes paid to taxing authorities | 140 | 1,605 | 1,362 | ||||||
| Non-cash investing and financing activities: | |||||||||
| Capital lease obligations increase | 0 | 1 | 0 | ||||||
| Contribution of fixed assets to joint venture | 272 | [1] | 0 | 0 | |||||
| Property, plant and equipment sold | 0 | 5 | 4 | ||||||
| Property, plant and equipment acquired | 0 | 5 | 4 | ||||||
| Acquisition: | |||||||||
| Fair value of MPLX units issued | $ 0 | 7,326 | [2] | $ 0 | |||||
| Payable to seller | $ 50 | ||||||||
| |||||||||
Supplemental Cash Flow Information (Reconciliation Of Additions To Property, Plant And Equipment To Total Capital Expenditures) (Detail) - USD ($) $ in Millions |
12 Months Ended | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
||||||||||
| Supplemental Cash Flow Information [Abstract] | ||||||||||||
| Additions to property, plant and equipment per consolidated statements of cash flows | $ 2,892 | $ 1,998 | $ 1,480 | |||||||||
| Non-cash additions to property, plant and equipment | 0 | 5 | 4 | |||||||||
| Asset retirement expenditures | 6 | [1] | 1 | [1] | 2 | |||||||
| Increase (decrease) in capital accruals | (127) | 94 | 95 | |||||||||
| Total capital expenditures before acquisitions | 2,771 | 2,098 | 1,581 | |||||||||
| Acquisitions | [2] | (133) | 11,397 | 2,744 | ||||||||
| Total capital expenditures | [3] | $ 2,638 | $ 13,495 | $ 4,325 | ||||||||
| ||||||||||||
Accumulated Other Comprehensive Loss (Changes in Accumulated Other Comprehensive Loss by Component) (Details) - USD ($) $ in Millions |
12 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
||||||
| Accumulated Other Comprehensive Income (Loss) [Roll Forward] | ||||||||
| Beginning balance | $ (318) | $ (313) | ||||||
| Other comprehensive income before reclassifications | 86 | (14) | ||||||
| Amounts reclassified from accumulated other comprehensive loss: | ||||||||
| Amortization - prior service credit | (49) | (50) | ||||||
| Amortization– actuarial loss | 40 | 59 | ||||||
| Amortization– settlement loss | 7 | 4 | ||||||
| Other | (1) | |||||||
| Tax effect | 1 | (4) | ||||||
| Other comprehensive income (loss) | 84 | (5) | $ (109) | |||||
| Ending balance | (234) | (318) | (313) | |||||
| Pension Benefits | ||||||||
| Amounts reclassified from accumulated other comprehensive loss: | ||||||||
| Amortization - prior service credit | (46) | (46) | (46) | |||||
| Other Benefits | ||||||||
| Amounts reclassified from accumulated other comprehensive loss: | ||||||||
| Amortization - prior service credit | (3) | (4) | (4) | |||||
| Accumulated Defined Benefit Plans Adjustment | Pension Benefits | ||||||||
| Accumulated Other Comprehensive Income (Loss) [Roll Forward] | ||||||||
| Beginning balance | (255) | (217) | ||||||
| Other comprehensive income before reclassifications | 22 | (44) | ||||||
| Amounts reclassified from accumulated other comprehensive loss: | ||||||||
| Amortization - prior service credit | [1] | (46) | (46) | |||||
| Amortization– actuarial loss | [1] | 38 | 51 | |||||
| Amortization– settlement loss | [1] | 7 | 4 | |||||
| Tax effect | 1 | (3) | ||||||
| Other comprehensive income (loss) | 22 | (38) | ||||||
| Ending balance | (233) | (255) | (217) | |||||
| Accumulated Defined Benefit Plans Adjustment | Other Benefits | ||||||||
| Accumulated Other Comprehensive Income (Loss) [Roll Forward] | ||||||||
| Beginning balance | (70) | (104) | ||||||
| Other comprehensive income before reclassifications | 64 | 31 | ||||||
| Amounts reclassified from accumulated other comprehensive loss: | ||||||||
| Amortization - prior service credit | [1] | (3) | (4) | |||||
| Amortization– actuarial loss | [1] | 2 | 8 | |||||
| Amortization– settlement loss | [1] | 0 | 0 | |||||
| Tax effect | 0 | (1) | ||||||
| Other comprehensive income (loss) | 63 | 34 | ||||||
| Ending balance | (7) | (70) | (104) | |||||
| Gain on Cash Flow Hedge | ||||||||
| Accumulated Other Comprehensive Income (Loss) [Roll Forward] | ||||||||
| Beginning balance | 4 | 4 | ||||||
| Other comprehensive income before reclassifications | 0 | 0 | ||||||
| Amounts reclassified from accumulated other comprehensive loss: | ||||||||
| Tax effect | 0 | 0 | ||||||
| Other comprehensive income (loss) | 0 | 0 | ||||||
| Ending balance | 4 | 4 | 4 | |||||
| Workers Compensation | ||||||||
| Accumulated Other Comprehensive Income (Loss) [Roll Forward] | ||||||||
| Beginning balance | 3 | 4 | ||||||
| Other comprehensive income before reclassifications | 0 | (1) | ||||||
| Amounts reclassified from accumulated other comprehensive loss: | ||||||||
| Other | [2] | (1) | ||||||
| Tax effect | 0 | 0 | ||||||
| Other comprehensive income (loss) | (1) | (1) | ||||||
| Ending balance | $ 2 | $ 3 | $ 4 | |||||
| ||||||||
Defined Benefit Pension And Other Postretirement Plans (Summary Of Defined Benefit Plans With Accumulated Benefit Obligations In Excess Of Plan Assets) (Detail) - USD ($) $ in Millions |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract] | ||
| Projected benefit obligations | $ 2,024 | $ 1,997 |
| Accumulated benefit obligations | 1,914 | 1,918 |
| Fair value of plan assets | $ 1,659 | $ 1,570 |
Defined Benefit Pension And Other Postretirement Plans (Summary Of Projected Benefit Obligations And Funded Status For Defined Benefit Pension And Other Postretirement Plans) (Detail) - USD ($) $ in Millions |
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
||||||||
| Change in plan assets: | ||||||||||
| Fair value of plan assets at January 1 | $ 1,570 | |||||||||
| Fair value of plan assets at December 31 | 1,659 | $ 1,570 | ||||||||
| Amounts recognized in the consolidated balance sheets: | ||||||||||
| Noncurrent liabilities | (1,055) | (1,179) | ||||||||
| Pension Benefits | ||||||||||
| Change in benefit obligations: | ||||||||||
| Benefit obligations at January 1 | 1,997 | 2,075 | ||||||||
| Service cost | 114 | 101 | $ 88 | |||||||
| Interest cost | 73 | 71 | 74 | |||||||
| Actuarial (gain) loss | 15 | (63) | ||||||||
| Benefits paid | (175) | (187) | ||||||||
| Other | 0 | 0 | ||||||||
| Benefit obligations at December 31 | 2,024 | 1,997 | 2,075 | |||||||
| Change in plan assets: | ||||||||||
| Fair value of plan assets at January 1 | 1,570 | 1,744 | ||||||||
| Actual return on plan assets | 145 | (33) | ||||||||
| Employer contributions | 119 | 46 | ||||||||
| Benefits paid | (175) | (187) | ||||||||
| Fair value of plan assets at December 31 | 1,659 | 1,570 | 1,744 | |||||||
| Funded status of plans at December 31 | (365) | (427) | ||||||||
| Amounts recognized in the consolidated balance sheets: | ||||||||||
| Current liabilities | (18) | (19) | ||||||||
| Noncurrent liabilities | (347) | (408) | ||||||||
| Accrued benefit cost | (365) | (427) | ||||||||
| Pretax amounts recognized in accumulated other comprehensive loss: | ||||||||||
| Net actuarial loss | 645 | [1] | 723 | |||||||
| Prior service credit | (276) | [1] | (323) | |||||||
| Pension Benefits | LOOP LLC and Explorer Pipeline [Member] | ||||||||||
| Pretax amounts recognized in accumulated other comprehensive loss: | ||||||||||
| Net actuarial loss | [1] | 16 | ||||||||
| Other Benefits | ||||||||||
| Change in benefit obligations: | ||||||||||
| Benefit obligations at January 1 | 800 | 812 | ||||||||
| Service cost | 32 | 31 | 27 | |||||||
| Interest cost | 35 | 32 | 33 | |||||||
| Actuarial (gain) loss | (101) | (63) | ||||||||
| Benefits paid | (26) | (24) | ||||||||
| Other | 0 | 12 | [2] | |||||||
| Benefit obligations at December 31 | 740 | 800 | 812 | |||||||
| Change in plan assets: | ||||||||||
| Fair value of plan assets at January 1 | 0 | 0 | ||||||||
| Actual return on plan assets | 0 | 0 | ||||||||
| Employer contributions | 26 | 24 | ||||||||
| Benefits paid | (26) | (24) | ||||||||
| Fair value of plan assets at December 31 | 0 | 0 | $ 0 | |||||||
| Funded status of plans at December 31 | (740) | (800) | ||||||||
| Amounts recognized in the consolidated balance sheets: | ||||||||||
| Current liabilities | (32) | (29) | ||||||||
| Noncurrent liabilities | (708) | (771) | ||||||||
| Accrued benefit cost | (740) | (800) | ||||||||
| Pretax amounts recognized in accumulated other comprehensive loss: | ||||||||||
| Net actuarial loss | 17 | [1] | 120 | |||||||
| Prior service credit | (6) | [1] | $ (9) | |||||||
| Other Benefits | LOOP LLC and Explorer Pipeline [Member] | ||||||||||
| Pretax amounts recognized in accumulated other comprehensive loss: | ||||||||||
| Net actuarial loss | [1] | $ 1 | ||||||||
| ||||||||||
Defined Benefit Pension And Other Postretirement Plans (Components Of Net Periodic Benefit Cost And Other Comprehensive Loss) (Detail) - USD ($) $ in Millions |
12 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|||||||
| Other changes in plan assets and benefit obligations recognized in other comprehensive loss (pretax): | |||||||||
| Amortization of prior service cost | $ 49 | $ 50 | |||||||
| Pension Benefits | |||||||||
| Components of net periodic benefit cost: | |||||||||
| Service cost | 114 | 101 | $ 88 | ||||||
| Interest cost | 73 | 71 | 74 | ||||||
| Expected return on plan assets | (98) | (98) | (107) | ||||||
| Amortization – prior service credit | (46) | (46) | (46) | ||||||
| Amortization – actuarial loss | 38 | 51 | 51 | ||||||
| Amortization – settlement loss | 7 | 4 | 96 | ||||||
| Net periodic benefit cost | [1] | 88 | 83 | 156 | |||||
| Other changes in plan assets and benefit obligations recognized in other comprehensive loss (pretax): | |||||||||
| Actuarial (gain) loss | (33) | 69 | 188 | ||||||
| Prior service cost (credit) | 0 | 0 | 0 | ||||||
| Amortization of actuarial loss | (45) | (55) | (147) | ||||||
| Amortization of prior service cost | 46 | 46 | 46 | ||||||
| Other | 0 | 0 | 0 | ||||||
| Total recognized in other comprehensive loss | (32) | 60 | 87 | ||||||
| Total recognized in net periodic benefit cost and other comprehensive loss | 56 | 143 | 243 | ||||||
| Estimated net gain (loss) that will be amortized from accumulated other comprehensive loss in 2017 | 35 | ||||||||
| Estimated prior service cost that will be amortized from accumulated other comprehensive loss in 2017 | 39 | ||||||||
| Other Benefits | |||||||||
| Components of net periodic benefit cost: | |||||||||
| Service cost | 32 | 31 | 27 | ||||||
| Interest cost | 35 | 32 | 33 | ||||||
| Expected return on plan assets | 0 | 0 | 0 | ||||||
| Amortization – prior service credit | (3) | (4) | (4) | ||||||
| Amortization – actuarial loss | 2 | 8 | 2 | ||||||
| Amortization – settlement loss | 0 | 0 | 0 | ||||||
| Net periodic benefit cost | [1] | 66 | 67 | 58 | |||||
| Other changes in plan assets and benefit obligations recognized in other comprehensive loss (pretax): | |||||||||
| Actuarial (gain) loss | (101) | (63) | 86 | ||||||
| Prior service cost (credit) | 0 | 13 | [2] | 0 | |||||
| Amortization of actuarial loss | (2) | (8) | (2) | ||||||
| Amortization of prior service cost | 3 | 4 | 4 | ||||||
| Other | 0 | 0 | 0 | ||||||
| Total recognized in other comprehensive loss | (100) | (54) | 88 | ||||||
| Total recognized in net periodic benefit cost and other comprehensive loss | (34) | $ 13 | $ 146 | ||||||
| Estimated net gain (loss) that will be amortized from accumulated other comprehensive loss in 2017 | 2 | ||||||||
| Estimated prior service cost that will be amortized from accumulated other comprehensive loss in 2017 | $ 3 | ||||||||
| |||||||||
Defined Benefit Pension And Other Postretirement Plans (Summary Of Assumptions Used To Determine Benefit Obligations And Net Periodic Benefit Cost) (Detail) |
1 Months Ended | 12 Months Ended | |||||
|---|---|---|---|---|---|---|---|
Jan. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
||||
| Pension Benefits | |||||||
| Weighted-average assumptions used to determine benefit obligation: | |||||||
| Discount rate | 3.90% | 4.00% | 3.65% | ||||
| Rate of compensation increase | 5.00% | 3.70% | 3.70% | ||||
| Weighted-average assumptions used to determine net periodic benefit cost: | |||||||
| Discount rate | 3.80% | 3.70% | 4.05% | ||||
| Expected long-term return on plan assets | [1] | 6.50% | 6.75% | 7.00% | |||
| Rate of compensation increase | 5.00% | 3.70% | 3.70% | ||||
| Pension Benefits | Scenario, Forecast | |||||||
| Weighted-average assumptions used to determine net periodic benefit cost: | |||||||
| Expected long-term return on plan assets | [1] | 6.50% | |||||
| Other Benefits | |||||||
| Weighted-average assumptions used to determine benefit obligation: | |||||||
| Discount rate | 4.25% | 4.50% | 4.15% | ||||
| Rate of compensation increase | 5.00% | 3.70% | 3.70% | ||||
| Weighted-average assumptions used to determine net periodic benefit cost: | |||||||
| Discount rate | 4.50% | 4.30% | 4.95% | ||||
| Expected long-term return on plan assets | [1] | 0.00% | 0.00% | 0.00% | |||
| Rate of compensation increase | 5.00% | 3.70% | 3.70% | ||||
| |||||||
Defined Benefit Pension and Other Postretirement Plans (Expected Long-Term Return on Plan Assets) (Details) |
12 Months Ended |
|---|---|
Dec. 31, 2016 | |
| Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract] | |
| Defined benefit plan, investment goals | The overall expected long-term return on plan assets assumption is determined based on an asset rate-of-return modeling tool developed by a third-party investment group. The tool utilizes underlying assumptions based on actual returns by asset category and inflation and takes into account our asset allocation to derive an expected long-term rate of return on those assets. Capital market assumptions reflect the long-term capital market outlook. The assumptions for equity and fixed income investments are developed using a building-block approach, reflecting observable inflation information and interest rate information available in the fixed income markets. Long-term assumptions for other asset categories are based on historical results, current market characteristics and the professional judgment of our internal and external investment teams. |
Defined Benefit Pension And Other Postretirement Plans (Summarizes Assumed Health Care Cost Trend Rates) (Detail) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Medical Pre-65 | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Health care cost trend rate assumed for the following year: | 7.00% | 7.50% | 8.00% |
| Rate to which the cost trend rate is assumed to decline (the ultimate trend rate): | 4.50% | 5.00% | 5.00% |
| Year that the rate reaches the ultimate trend rate: | 2026 | 2021 | 2021 |
| Prescription drugs | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Health care cost trend rate assumed for the following year: | 9.00% | 7.00% | 7.00% |
| Rate to which the cost trend rate is assumed to decline (the ultimate trend rate): | 4.50% | 5.00% | 5.00% |
| Year that the rate reaches the ultimate trend rate: | 2026 | 2021 | 2021 |
| Medical Post-65 | Maximum | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Health care cost trend rate assumed for the following year: | 4.00% | ||
Defined Benefit Pension And Other Postretirement Plans (Effects Of One Percentage Point Change In Assumed Health Care Cost Trend Rates) (Detail) $ in Millions |
12 Months Ended |
|---|---|
|
Dec. 31, 2016
USD ($)
| |
| Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract] | |
| Effect on total of service and interest cost components, 1-Percentage-Point-Increase | $ 6 |
| Effect on other postretirement benefit obligations, 1-Percentage-Point-Increase | 33 |
| Effect on total of service and interest cost components, 1-Percentage-Point Decrease | (5) |
| Effect on other postretirement benefit obligations, 1-Percentage-Point-Decrease | $ (29) |
Defined Benefit Pension and Other Postretirement Plans (Plan Investment Policies And Strategies) (Details) |
12 Months Ended |
|---|---|
Dec. 31, 2016 | |
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |
| Defined benefit plan, diversification | The asset allocation strategy will change over time in response to changes primarily in funded status, which is dictated by current and anticipated market conditions, the independent actions of our investment committee, required cash flows to and from the plans and other factors deemed appropriate. Such changes in asset allocation are intended to allocate additional assets to the fixed income asset class should the funded status improve. The fixed income asset class shall be invested in such a manner that its interest rate sensitivity correlates highly with that of the plans’ liabilities. Other asset classes are intended to provide additional return with associated higher levels of risk. |
| Plan investment policies and strategies | Investment performance and risk is measured and monitored on an ongoing basis through quarterly investment meetings and periodic asset and liability studies. |
| Equity Securities | |
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |
| Targeted asset allocation | 51.00% |
| Fixed Income Securities | |
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |
| Targeted asset allocation | 49.00% |
Defined Benefit Pension And Other Postretirement Plans (Fair Values Of Defined Benefit Pension Plan Assets) (Detail) - USD ($) $ in Millions |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|---|---|---|---|
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | $ 1,659 | $ 1,570 | |
| Cash and cash equivalents | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 24 | 27 | |
| Equity investments, common stocks | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 71 | 57 | |
| Equity funds, mutual funds | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 160 | 142 | |
| Equity funds, pooled funds | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 451 | 399 | |
| Fixed income, corporate | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 570 | 516 | |
| Fixed income, government | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 90 | 103 | |
| Fixed income, pooled funds | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 173 | 193 | |
| Private equity | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 60 | 62 | |
| Real estate | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 39 | 50 | |
| Other | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 21 | 21 | |
| Level 1 | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 233 | 201 | |
| Level 1 | Cash and cash equivalents | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 0 | 0 | |
| Level 1 | Equity investments, common stocks | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 71 | 57 | |
| Level 1 | Equity funds, mutual funds | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 160 | 142 | |
| Level 1 | Equity funds, pooled funds | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 0 | 0 | |
| Level 1 | Fixed income, corporate | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 0 | 0 | |
| Level 1 | Fixed income, government | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 0 | 0 | |
| Level 1 | Fixed income, pooled funds | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 0 | 0 | |
| Level 1 | Private equity | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 0 | 0 | |
| Level 1 | Real estate | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 0 | 0 | |
| Level 1 | Other | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 2 | 2 | |
| Level 2 | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 1,308 | 1,238 | |
| Level 2 | Cash and cash equivalents | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 24 | 27 | |
| Level 2 | Equity investments, common stocks | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 0 | 0 | |
| Level 2 | Equity funds, mutual funds | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 0 | 0 | |
| Level 2 | Equity funds, pooled funds | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 451 | 399 | |
| Level 2 | Fixed income, corporate | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 570 | 516 | |
| Level 2 | Fixed income, government | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 90 | 103 | |
| Level 2 | Fixed income, pooled funds | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 173 | 193 | |
| Level 2 | Private equity | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 0 | 0 | |
| Level 2 | Real estate | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 0 | 0 | |
| Level 2 | Other | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 0 | 0 | |
| Level 3 | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 118 | 131 | $ 144 |
| Level 3 | Cash and cash equivalents | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 0 | 0 | |
| Level 3 | Equity investments, common stocks | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 0 | 0 | |
| Level 3 | Equity funds, mutual funds | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 0 | 0 | |
| Level 3 | Equity funds, pooled funds | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 0 | 0 | |
| Level 3 | Fixed income, corporate | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 0 | 0 | |
| Level 3 | Fixed income, government | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 0 | 0 | |
| Level 3 | Fixed income, pooled funds | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 0 | 0 | |
| Level 3 | Private equity | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 60 | 62 | 66 |
| Level 3 | Real estate | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | 39 | 50 | 57 |
| Level 3 | Other | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Plan asset investments, at fair value | $ 19 | $ 19 | $ 21 |
Defined Benefit Pension And Other Postretirement Plans (Reconciliation Of Beginning And Ending Balances Of Plan Assets Classified As Level 3) (Detail) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value of plan assets at January 1 | $ 1,570 | |
| Actual return on plan assets: | ||
| Fair value of plan assets at December 31 | 1,659 | $ 1,570 |
| Private equity | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value of plan assets at January 1 | 62 | |
| Actual return on plan assets: | ||
| Fair value of plan assets at December 31 | 60 | 62 |
| Real estate | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value of plan assets at January 1 | 50 | |
| Actual return on plan assets: | ||
| Fair value of plan assets at December 31 | 39 | 50 |
| Other | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value of plan assets at January 1 | 21 | |
| Actual return on plan assets: | ||
| Fair value of plan assets at December 31 | 21 | 21 |
| Level 3 | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value of plan assets at January 1 | 131 | 144 |
| Actual return on plan assets: | ||
| Realized | 13 | 18 |
| Unrealized | (1) | (6) |
| Purchases | 3 | 10 |
| Sales | (28) | (35) |
| Fair value of plan assets at December 31 | 118 | 131 |
| Level 3 | Private equity | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value of plan assets at January 1 | 62 | 66 |
| Actual return on plan assets: | ||
| Realized | 8 | 12 |
| Unrealized | 2 | (1) |
| Purchases | 2 | 5 |
| Sales | (14) | (20) |
| Fair value of plan assets at December 31 | 60 | 62 |
| Level 3 | Real estate | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value of plan assets at January 1 | 50 | 57 |
| Actual return on plan assets: | ||
| Realized | 5 | 6 |
| Unrealized | (3) | (3) |
| Purchases | 1 | 5 |
| Sales | (14) | (15) |
| Fair value of plan assets at December 31 | 39 | 50 |
| Level 3 | Other | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value of plan assets at January 1 | 19 | 21 |
| Actual return on plan assets: | ||
| Realized | 0 | 0 |
| Unrealized | 0 | (2) |
| Purchases | 0 | 0 |
| Sales | 0 | 0 |
| Fair value of plan assets at December 31 | $ 19 | $ 19 |
Defined Benefit Pension and Other Postretirement Plans (Contributions To Defined Plans) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||
| Contributions to defined contribution plans | $ 113 | $ 94 | $ 86 |
| Pension Benefits | |||
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||
| Pension contributions | 119 | ||
| Unfunded Pension Plan | |||
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||
| Defined benefit plans, estimated future employer contributions in next fiscal year | 14 | ||
| Other Benefits | |||
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||
| Defined benefit plans, estimated future employer contributions in next fiscal year | $ 32 | ||
Defined Benefit Pension And Other Postretirement Plans (Estimated Future Benefit Payments) (Detail) $ in Millions |
Dec. 31, 2016
USD ($)
|
|---|---|
| Pension Benefits | |
| Defined Benefit Plan Disclosure [Line Items] | |
| 2017 | $ 174 |
| 2018 | 177 |
| 2019 | 182 |
| 2020 | 165 |
| 2021 | 165 |
| 2022 through 2026 | 801 |
| Other Benefits | |
| Defined Benefit Plan Disclosure [Line Items] | |
| 2017 | 32 |
| 2018 | 35 |
| 2019 | 37 |
| 2020 | 39 |
| 2021 | 41 |
| 2022 through 2026 | $ 222 |
Defined Benefit Pension And Other Postretirement Plans (Multiemployee Plans) (Detail) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2016
USD ($)
Plan
|
Dec. 31, 2015
USD ($)
|
Dec. 31, 2014
USD ($)
|
|
| Defined Benefit Plan Disclosure [Line Items] | |||
| Multiemployer pension plans percentage funded | 65.00% | ||
| Marathon Petroleum's contributions as a percentage of total contributions to the multi-employer pension plan, maximum | 5.00% | ||
| Multiemployer Plans, Pension | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Number of multiemployer defined benefit pension or health and welfare plan | 1 | ||
| Multi employer pension plans | There have been no significant changes that affect the comparability of 2016, 2015 and 2014 contributions. |
||
| Multiemployer Plans, Postretirement Benefit | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Number of multiemployer defined benefit pension or health and welfare plan | 1 | ||
| MPC contributions | $ | $ 6 | $ 7 | $ 6 |
Defined Benefit Pension And Other Postretirement Plans (Multi Employer Pension Plan) (Detail) - Multiemployer Plans, Pension |
12 Months Ended | |||||
|---|---|---|---|---|---|---|
|
Dec. 31, 2016
USD ($)
Employee
|
Dec. 31, 2015
USD ($)
|
Dec. 31, 2014
USD ($)
|
||||
| Multiemployer Plans [Line Items] | ||||||
| Multiemployer pension plan, minimum contribution requirement per week per employee | $ 303 | |||||
| Number of employees participated in the plan | Employee | 280 | |||||
| Central States, Southeast and Southwest Pension Plan [Member] | ||||||
| Multiemployer Plans [Line Items] | ||||||
| MPC contributions | $ 4,000,000 | [1] | $ 4,000,000 | $ 4,000,000 | ||
| ||||||
Stock-Based Compensation Plans (Narrative) (Detail) shares in Millions |
12 Months Ended |
|---|---|
|
Dec. 31, 2016
$ / shares
shares
| |
| Stock Options | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Share-based compensation arrangement by share-based payment award, expiration period | 10 years |
| Vesting period of awards | 3 years |
| Restricted Stock Awards and Restricted Stock Units | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Vesting period of awards | 3 years |
| Restricted stock and restricted stock unit awards granted in 2012, additional holding period | 1 year |
| Performance Shares | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Target payout | $ / shares | $ 1.00 |
| Maximum | Performance Shares | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Actual payout | $ / shares | $ 2.00 |
| Target payout percentage | 200.00% |
| MPC 2012 Plan | Maximum | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Number of shares of common stock authorized to be delivered under the compensation plan | 50 |
| MPC 2012 Plan | Maximum | Awards Other Than Stock Options Or Stock Appreciation Rights | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Number of shares of common stock authorized to be delivered under the compensation plan | 20 |
| MPC 2012 Plan | Maximum | Stock Options | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Number of shares of common stock authorized to be delivered under the compensation plan | 20 |
| MPC 2012 and 2011 Plans | Performance Shares | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Vesting period of awards | 36 months |
| Pay-out percentage in MPC common stock (in percentage) | 25.00% |
| Pay-out percentage in cash (in percentage) | 75.00% |
Stock-Based Compensation Plans (Stock-Based Compensation Expense) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | |||
| Stock-based compensation expense | $ 45 | $ 42 | $ 40 |
| Tax benefit recognized on stock-based compensation expense | 17 | 16 | 15 |
| Cash received by MPC upon exercise of stock option awards | 10 | 33 | 26 |
| Tax benefit received for tax deductions for stock awards exercised | $ 4 | $ 26 | $ 19 |
Stock-Based Compensation Plans (Weighted Average Assumptions Used To Value Stock Options Awards) (Detail) - Stock Options - $ / shares |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Weighted average exercise price per share | $ 35.27 | $ 50.85 | $ 42.51 |
| Expected life in years | 6 years 2 months 14 days | 6 years | 5 years 9 months 19 days |
| Expected volatility | 38.00% | 33.00% | 36.00% |
| Expected dividend yield | 3.00% | 2.00% | 1.90% |
| Risk-free interest rate | 1.40% | 1.70% | 1.80% |
| Weighted average grant date fair value of stock option awards granted | $ 9.84 | $ 13.44 | $ 12.69 |
| Implied volatility rate weighting (in percentage) | 50.00% | ||
| Historical volatility rate weighting (in percentage) | 50.00% | ||
Stock-Based Compensation Plans (Summary Of Stock Option Award Activity) (Detail) - Stock Options - USD ($) $ / shares in Units, $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Intrinsic value of options exercised | $ 14 | $ 60 | $ 48 |
| Unrecognized compensation cost | $ 8 | ||
| Weighted average recognition period, in years | 1 year 6 months 3 days | ||
| Number of Shares | |||
| Outstanding, beginning balance | 8,724,631 | ||
| Granted | 1,474,177 | ||
| Exercised | (637,761) | ||
| Forfeited, canceled or expired | (29,607) | ||
| Outstanding, ending balance | 9,531,440 | 8,724,631 | |
| Vested and expected to vest at December 31, 2016 (in shares) | 9,518,269 | ||
| Exercisable at December 31, 2016 (in shares) | 7,094,204 | ||
| Weighted Average Exercise Price | |||
| Outstanding, beginning balance (in USD per share) | $ 27.16 | ||
| Granted (in USD per share) | 35.27 | $ 50.85 | $ 42.51 |
| Exercised (in USD per share) | 18.78 | ||
| Forfeited, canceled or expired (in USD per share) | 42.91 | ||
| Outstanding, ending balance (in USD per share) | 28.93 | $ 27.16 | |
| Vested and expected to vest at December 31, 2016 (in USD per share) | 28.90 | ||
| Exercisable at December 31, 2016 (in USD per share) | $ 24.90 | ||
| Weighted Average Remaining Contractual Terms (in years) | |||
| Vested and expected to vest at December 31, 2016 (in years) | 5 years 4 months 8 days | ||
| Exercisable at December 31, 2016 (in years) | 4 years 3 months 1 day | ||
| Aggregate Intrinsic Value (in millions) | |||
| Vested and expected to vest at December 31, 2016 (in USD) | $ 205 | ||
| Exercisable at December 31, 2016 (in USD) | $ 181 | ||
Stock-Based Compensation Plans (Summary Of Restricted Stock Award Activity) (Detail) - $ / shares |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Restricted units outstanding | 361,117 | ||
| Restricted Stock | |||
| Number of Shares | |||
| Outstanding, beginning balance | 1,074,543 | ||
| Granted | 732,074 | ||
| RS’s Vested/RSU’s Issued | (477,339) | ||
| Forfeited | (78,935) | ||
| Outstanding, ending balance | 1,250,343 | 1,074,543 | |
| Weighted Average Grant Date Fair Value | |||
| Outstanding, beginning balance (in USD per share) | $ 47.70 | ||
| Granted (in USD per share) | 36.17 | $ 50.64 | $ 43.82 |
| RS's Vested/RSU's Issued (in USD per share) | 46.26 | ||
| Forfeited (in USD per share) | 47.53 | ||
| Outstanding, ending balance (in USD per share) | $ 41.51 | $ 47.70 | |
| Restricted Stock Units | |||
| Number of Shares | |||
| Outstanding, beginning balance | 513,220 | ||
| Granted | 45,495 | ||
| RS’s Vested/RSU’s Issued | (197,598) | ||
| Forfeited | 0 | ||
| Outstanding, ending balance | 361,117 | 513,220 | |
| Weighted Average Grant Date Fair Value | |||
| Outstanding, beginning balance (in USD per share) | $ 24.59 | ||
| Granted (in USD per share) | 40.85 | $ 49.87 | $ 42.95 |
| RS's Vested/RSU's Issued (in USD per share) | 21.62 | ||
| Forfeited (in USD per share) | 0.00 | ||
| Outstanding, ending balance (in USD per share) | $ 28.26 | $ 24.59 | |
| Non-Employee Directors | |||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Restricted units vested | 343,327 | ||
| Weighted average fair value, vested | $ 27.25 | ||
Stock-Based Compensation Plans (Summary Of Values Related To Vested And Unvested Restricted Stock Awards) (Detail) - USD ($) $ / shares in Units, $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Restricted Stock | |||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Intrinsic Value of Awards Vested During the Period (in millions) | $ 17 | $ 27 | $ 28 |
| Weighted Average Grant Date Fair Value of Awards Granted During the Period | $ 36.17 | $ 50.64 | $ 43.82 |
| Unrecognized compensation cost | $ 34 | ||
| Weighted average recognition period, in years | 1 year 6 months 3 days | ||
| Restricted Stock Units | |||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Intrinsic Value of Awards Vested During the Period (in millions) | $ 8 | $ 21 | $ 0 |
| Weighted Average Grant Date Fair Value of Awards Granted During the Period | $ 40.85 | $ 49.87 | $ 42.95 |
| Unrecognized compensation cost | $ 0 | ||
Stock-Based Compensation Plans (Summary Of Performance Unit Awards) (Detail) - Performance Shares - USD ($) $ / shares in Units, $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Shares issued in period | 124,234 | ||
| Unrecognized compensation cost | $ 2 | ||
| Weighted average recognition period, in years | 1 year 6 months 12 days | ||
| Number of Shares | |||
| Outstanding, beginning balance | 6,145,442 | ||
| Granted | 2,329,500 | ||
| Exercised | (1,904,792) | ||
| Canceled | (314,972) | ||
| Outstanding, ending balance | 6,255,178 | 6,145,442 | |
| Weighted Average Grant Date Fair Value | |||
| Outstanding, beginning balance (in USD per share) | $ 0.92 | ||
| Granted (in USD per share) | 0.57 | $ 0.95 | $ 0.85 |
| Exercised (in USD per share) | 0.95 | ||
| Canceled (in USD per share) | 0.93 | ||
| Outstanding, ending balance (in USD per share) | $ 0.78 | $ 0.92 | |
Stock-Based Compensation Plans (Weighted Average Assumptions Used to Value Performance Unit Awards) (Details) - Performance Shares - $ / shares |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Risk-free interest rate | 0.96% | 0.95% | 0.63% |
| Look-back period | 2 years 9 months 30 days | 2 years 10 months 3 days | 2 years 10 months 3 days |
| Expected volatility | 34.15% | 30.38% | 38.51% |
| Grant date fair value of performance units granted | $ 0.57 | $ 0.95 | $ 0.85 |
Leases (Schedule Of Future Minimum Commitments) (Detail) $ in Millions |
Dec. 31, 2016
USD ($)
|
|---|---|
| Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] | |
| 2017 | $ 50 |
| 2018 | 50 |
| 2019 | 45 |
| 2020 | 49 |
| 2021 | 45 |
| Later years | 206 |
| Total minimum lease payments | 445 |
| Less imputed interest costs | (126) |
| Present value of net minimum lease payments | 319 |
| Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] | |
| 2017 | 254 |
| 2018 | 211 |
| 2019 | 198 |
| 2020 | 188 |
| 2021 | 170 |
| Later years | 569 |
| Total minimum lease payments | $ 1,590 |
Leases (Schedule Of Operating Lease Rental Expense) (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Leases [Abstract] | |||
| Rental expense | $ 327 | $ 331 | $ 256 |
Leases (Narrative) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Leases [Abstract] | |||
| Operating lease revenue | $ 246 | $ 16 | $ 0 |
| Contingent lease payments received | $ 7 | $ 1 | |
Leases (Minimum Future Rentals On The Non-Cancellable Operating Leases) (Details) $ in Millions |
Dec. 31, 2016
USD ($)
|
|---|---|
| Leases [Abstract] | |
| 2017 | $ 197 |
| 2018 | 200 |
| 2019 | 202 |
| 2020 | 201 |
| 2021 | 185 |
| Later years | 460 |
| Total minimum lease payments | $ 1,445 |
Leases (Investments In Assets Held For Operating Lease By Major Classes) (Details) $ in Millions |
Dec. 31, 2016
USD ($)
|
|---|---|
| Operating Leased Assets [Line Items] | |
| Property, plant and equipment, gross | $ 1,713 |
| Less accumulated depreciation | 84 |
| Property, plant and equipment, net | 1,629 |
| Natural gas gathering and NGL transportation pipelines and facilities | |
| Operating Leased Assets [Line Items] | |
| Property, plant and equipment, gross | 650 |
| Natural gas processing facilities | |
| Operating Leased Assets [Line Items] | |
| Property, plant and equipment, gross | 844 |
| Construction in progress | |
| Operating Leased Assets [Line Items] | |
| Property, plant and equipment, gross | $ 219 |
Commitments and Contingencies (Detail) |
12 Months Ended |
|---|---|
Dec. 31, 2016 | |
| Pending Litigation | |
| Loss Contingencies [Line Items] | |
| Loss contingency, inestimable loss | For matters for which we have not recorded an accrued liability, we are unable to estimate a range of possible loss because the issues involved have not been fully developed through pleadings and discovery. |
Commitments and Contingencies (Environmental Matters) (Details) - USD ($) $ in Millions |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Commitments and Contingencies Disclosure [Abstract] | ||
| Accrued liabilities for remediation | $ 132 | $ 163 |
| Receivables for recoverable costs | $ 58 | $ 70 |
Commitments and Contingencies (MarkWest Environmental Proceedings) (Details) - MarkWest Liberty Midstream Pipeline Launcher/Receiver Site [Member] - Pending Litigation $ in Millions |
12 Months Ended |
|---|---|
|
Dec. 31, 2016
USD ($)
| |
| Cash | |
| Loss Contingencies [Line Items] | |
| Proposed settlement | $ 2.4 |
| Other Liabilities | |
| Loss Contingencies [Line Items] | |
| Proposed settlement | $ 3.6 |
Commitments and Contingencies (Lawsuits) (Details) - Emergency Pricing And Consumer Protection Laws - Pending Litigation $ in Millions |
12 Months Ended |
|---|---|
|
Dec. 31, 2016
USD ($)
| |
| Loss Contingencies [Line Items] | |
| Plaintiff | Commonwealth of Kentucky |
| Alleged amount overcharged from customers | $ 89 |
| Loss contingency, period of occurrence | during September and October 2005 |
Commitments and Contingencies (Guarantees) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
May 31, 2016 |
Sep. 30, 2015 |
|
| Centennial | |||
| Loss Contingencies [Line Items] | |||
| Equity method investments, ownership percentage | 50.00% | ||
| Crowley Ocean Partners | |||
| Loss Contingencies [Line Items] | |||
| Equity method investments, ownership percentage | 50.00% | 50.00% | 50.00% |
| Crowley Blue Water Partners | |||
| Loss Contingencies [Line Items] | |||
| Equity method investments, ownership percentage | 50.00% | ||
| Financial Guarantee | Centennial | |||
| Loss Contingencies [Line Items] | |||
| Maximum potential undiscounted payments | $ 29 | ||
| Financial Guarantee | Master Shelf Agreement | Centennial | |||
| Loss Contingencies [Line Items] | |||
| Line of credit facility, expiration date | Dec. 31, 2024 | ||
| Financial Guarantee | Guarantee of Indebtedness of Others | LOOP and LOCAP LLC | |||
| Loss Contingencies [Line Items] | |||
| Line of credit facility, expiration date | Dec. 31, 2037 | ||
| Financial Guarantee | Guarantee of Indebtedness of Others | Crowley Ocean Partners | Crowley Term Loan [Member] | |||
| Loss Contingencies [Line Items] | |||
| Line of credit facility, maximum borrowing capacity | $ 325 | ||
| Indemnification Agreement | Marathon Oil Companies | |||
| Loss Contingencies [Line Items] | |||
| Guarantee obligation current carrying value | 2 | ||
| Other Guarantees | |||
| Loss Contingencies [Line Items] | |||
| Maximum potential undiscounted payments | 82 | ||
| Guarantee obligations maximum exposure per event | 50 | ||
| Guarantee of Indebtedness of Others | Financial Guarantee | LOOP and LOCAP LLC | |||
| Loss Contingencies [Line Items] | |||
| Maximum potential undiscounted payments | 172 | ||
| Guarantee of Indebtedness of Others | Financial Guarantee | Crowley Ocean Partners | |||
| Loss Contingencies [Line Items] | |||
| Maximum potential undiscounted payments | 163 | ||
| Guarantee of Indebtedness of Others | Financial Guarantee | Crowley Blue Water Partners | |||
| Loss Contingencies [Line Items] | |||
| Maximum potential undiscounted payments | $ 142 |
Commitments and Contingences (Contractual Commitments and Contingencies) (Details) - USD ($) $ in Millions |
12 Months Ended | 30 Months Ended | |
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2016 |
|
| Loss Contingencies [Line Items] | |||
| Contractual commitments to acquire property, plant and equipment and advance funds to equity method investees | $ 899 | $ 1,600 | |
| North Dakota Pipeline | |||
| Loss Contingencies [Line Items] | |||
| Contractual commitments to acquire property, plant and equipment and advance funds to equity method investees | 630 | ||
| Crowley Ocean Partners | |||
| Loss Contingencies [Line Items] | |||
| Contractual commitments to acquire property, plant and equipment and advance funds to equity method investees | 69 | ||
| Galveston Bay Refinery and Related Assets | |||
| Loss Contingencies [Line Items] | |||
| Contractual commitments to acquire property, plant and equipment and advance funds to equity method investees | $ 131 | $ 331 | $ 131 |
Subsequent Events (Details) bbl / d in Thousands, $ in Millions |
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
Feb. 13, 2017
USD ($)
bbl / d
mi
in
|
Feb. 10, 2017
USD ($)
|
Feb. 06, 2017
USD ($)
|
Dec. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
Dec. 31, 2014
USD ($)
|
|||||
| Subsequent Event [Line Items] | ||||||||||
| Contribution of fixed assets to joint venture | $ 272 | [1] | $ 0 | $ 0 | ||||||
| Additions to property, plant and equipment | $ (2,892) | $ (1,998) | $ (1,480) | |||||||
| Subsequent Event | MPLX LP | Senior Notes | Senior Notes Due March 2027 | ||||||||||
| Subsequent Event [Line Items] | ||||||||||
| Long-term debt, gross | $ 1,250 | |||||||||
| Debt instrument, interest rate | 4.125% | |||||||||
| Debt instrument, maturity date | Mar. 01, 2027 | |||||||||
| Subsequent Event | MPLX LP | Senior Notes | Senior Notes Due March 2047 | ||||||||||
| Subsequent Event [Line Items] | ||||||||||
| Long-term debt, gross | $ 1,000 | |||||||||
| Debt instrument, interest rate | 5.20% | |||||||||
| Debt instrument, maturity date | Mar. 01, 2047 | |||||||||
| Sherwood Midstream | Subsequent Event | MPLX LP | ||||||||||
| Subsequent Event [Line Items] | ||||||||||
| Contribution of fixed assets to joint venture | [1] | $ 134 | ||||||||
| Sherwood Midstream | Subsequent Event | Antero Midstream Partners L.P. | ||||||||||
| Subsequent Event [Line Items] | ||||||||||
| Payments to acquire interest in joint venture | [1] | $ 154 | ||||||||
| Ozark Pipeline | Subsequent Event | ||||||||||
| Subsequent Event [Line Items] | ||||||||||
| Pipeline length | mi | 433 | |||||||||
| Pipeline diameter | in | 22 | |||||||||
| Crude oil throughput | bbl / d | 230 | |||||||||
| Ozark Pipeline | Subsequent Event | MPLX LP | ||||||||||
| Subsequent Event [Line Items] | ||||||||||
| Additions to property, plant and equipment | $ (220) | |||||||||
| ||||||||||
Selected Quarterly Financial Data (Schedule Of Quarterly Financial Information) (Detail) - USD ($) $ / shares in Units, $ in Millions |
3 Months Ended | 12 Months Ended | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2016 |
Sep. 30, 2016 |
Jun. 30, 2016 |
Mar. 31, 2016 |
Dec. 31, 2015 |
Sep. 30, 2015 |
Jun. 30, 2015 |
Mar. 31, 2015 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
||||
| Quarterly Financial Data [Abstract] | ||||||||||||||
| Revenues | $ 17,155 | $ 16,618 | $ 16,811 | $ 12,755 | $ 15,607 | $ 18,716 | $ 20,537 | $ 17,191 | ||||||
| Income from operations | 553 | 435 | 1,315 | 75 | 338 | 1,549 | 1,335 | 1,470 | $ 2,378 | $ 4,692 | $ 4,051 | |||
| Net income | 289 | 219 | 783 | (78) | 168 | 958 | 839 | 903 | 1,213 | 2,868 | 2,555 | |||
| Net income attributable to MPC | $ 227 | $ 145 | $ 801 | $ 1 | $ 187 | $ 948 | $ 826 | $ 891 | $ 1,174 | $ 2,852 | $ 2,524 | |||
| Net income attributable to MPC per share: | ||||||||||||||
| Basic (in USD per share) | $ 0.43 | $ 0.28 | $ 1.51 | $ 0.003 | $ 0.35 | $ 1.77 | $ 1.52 | $ 1.63 | [1] | $ 2.22 | $ 5.29 | $ 4.42 | ||
| Diluted (in USD per share) | 0.43 | 0.27 | 1.51 | 0.003 | 0.35 | 1.76 | 1.51 | 1.62 | [1] | 2.21 | 5.26 | 4.39 | ||
| Dividends paid per share (in USD per share) | $ 0.36 | $ 0.36 | $ 0.32 | $ 0.32 | $ 0.32 | $ 0.32 | $ 0.25 | $ 0.25 | [1] | $ 1.36 | $ 1.14 | $ 0.92 | ||
| ||||||||||||||
Supplementary Statistics (Supplementary Statistics) (Detail) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 04, 2015 |
Sep. 30, 2014 |
Dec. 31, 2016 |
Sep. 30, 2016 |
Jun. 30, 2016 |
Mar. 31, 2016 |
Dec. 31, 2015 |
Sep. 30, 2015 |
Jun. 30, 2015 |
Mar. 31, 2015 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|||||||||||||||||||||||
| Supplementary Statistics [Line Items] | |||||||||||||||||||||||||||||||||||
| Income from operations | $ 553 | $ 435 | $ 1,315 | $ 75 | $ 338 | $ 1,549 | $ 1,335 | $ 1,470 | $ 2,378 | $ 4,692 | $ 4,051 | ||||||||||||||||||||||||
| Segment capital expenditures and investments | 3,069 | 16,283 | 4,738 | ||||||||||||||||||||||||||||||||
| Inventory market valuation adjustment | (370) | 370 | 0 | ||||||||||||||||||||||||||||||||
| Hess Retail Operations and Related Assets | |||||||||||||||||||||||||||||||||||
| Supplementary Statistics [Line Items] | |||||||||||||||||||||||||||||||||||
| Segment capital expenditures and investments | 2,710 | ||||||||||||||||||||||||||||||||||
| Refining & Marketing | |||||||||||||||||||||||||||||||||||
| Supplementary Statistics [Line Items] | |||||||||||||||||||||||||||||||||||
| Inventory market valuation adjustment | [1] | (345) | 345 | ||||||||||||||||||||||||||||||||
| Speedway | |||||||||||||||||||||||||||||||||||
| Supplementary Statistics [Line Items] | |||||||||||||||||||||||||||||||||||
| Inventory market valuation adjustment | [1] | (25) | 25 | ||||||||||||||||||||||||||||||||
| Operating Segments | |||||||||||||||||||||||||||||||||||
| Supplementary Statistics [Line Items] | |||||||||||||||||||||||||||||||||||
| Income from operations | 3,148 | 5,139 | 4,424 | ||||||||||||||||||||||||||||||||
| Segment capital expenditures and investments | 2,925 | 16,091 | 4,628 | ||||||||||||||||||||||||||||||||
| Operating Segments | Refining & Marketing | |||||||||||||||||||||||||||||||||||
| Supplementary Statistics [Line Items] | |||||||||||||||||||||||||||||||||||
| Income from operations | 1,543 | [2] | 4,086 | [2] | 3,538 | ||||||||||||||||||||||||||||||
| Segment capital expenditures and investments | [3] | 1,101 | 1,045 | 1,043 | [4] | ||||||||||||||||||||||||||||||
| Operating Segments | Refining & Marketing | Hess Retail Operations and Related Assets | |||||||||||||||||||||||||||||||||||
| Supplementary Statistics [Line Items] | |||||||||||||||||||||||||||||||||||
| Segment capital expenditures and investments | $ 52 | ||||||||||||||||||||||||||||||||||
| Operating Segments | Speedway | |||||||||||||||||||||||||||||||||||
| Supplementary Statistics [Line Items] | |||||||||||||||||||||||||||||||||||
| Income from operations | 734 | [2] | 673 | [2] | 544 | ||||||||||||||||||||||||||||||
| Segment capital expenditures and investments | [3] | 303 | 501 | 2,981 | [4] | ||||||||||||||||||||||||||||||
| Operating Segments | Speedway | Hess Retail Operations and Related Assets | |||||||||||||||||||||||||||||||||||
| Supplementary Statistics [Line Items] | |||||||||||||||||||||||||||||||||||
| Segment capital expenditures and investments | $ 2,660 | ||||||||||||||||||||||||||||||||||
| Operating Segments | Midstream | |||||||||||||||||||||||||||||||||||
| Supplementary Statistics [Line Items] | |||||||||||||||||||||||||||||||||||
| Income from operations | [5] | 871 | 380 | 342 | |||||||||||||||||||||||||||||||
| Segment capital expenditures and investments | [3] | 1,521 | 14,545 | [6] | 604 | ||||||||||||||||||||||||||||||
| Operating Segments | Midstream | MarkWest | |||||||||||||||||||||||||||||||||||
| Supplementary Statistics [Line Items] | |||||||||||||||||||||||||||||||||||
| Segment capital expenditures and investments | $ 13,850 | ||||||||||||||||||||||||||||||||||
| Operating Segments | Midstream | MPLX LP | |||||||||||||||||||||||||||||||||||
| Supplementary Statistics [Line Items] | |||||||||||||||||||||||||||||||||||
| Cost of services, overhead | 11 | 20 | 19 | ||||||||||||||||||||||||||||||||
| Corporate and Other | |||||||||||||||||||||||||||||||||||
| Supplementary Statistics [Line Items] | |||||||||||||||||||||||||||||||||||
| Income from operations | [7] | (277) | (299) | (277) | |||||||||||||||||||||||||||||||
| Segment capital expenditures and investments | [3],[8] | 144 | 192 | 110 | |||||||||||||||||||||||||||||||
| Capitalized interest | 63 | 37 | 27 | ||||||||||||||||||||||||||||||||
| Segment Reconciling Items | |||||||||||||||||||||||||||||||||||
| Supplementary Statistics [Line Items] | |||||||||||||||||||||||||||||||||||
| Pension settlement expenses | [9] | (7) | (4) | (96) | |||||||||||||||||||||||||||||||
| Impairment | $ (486) | [1] | $ (144) | [1] | $ 0 | ||||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||||||||
Supplementary Statistics (Operating Statistics) (Detail) bbl / d in Thousands, gal in Millions, CFPD in Millions, $ in Millions |
12 Months Ended | |||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2016
USD ($)
Store
bbl / d
CFPD
$ / bbl
$ / gal
gal
|
Dec. 31, 2015
USD ($)
Store
bbl / d
CFPD
$ / bbl
$ / gal
gal
|
Dec. 31, 2014
USD ($)
Store
bbl / d
$ / bbl
$ / gal
gal
|
||||||||||||||||||||||||||||||||
| Operating Statistics [Line Items ] | ||||||||||||||||||||||||||||||||||
| MPC Consolidated Refined Product Sales Volumes (thousands of barrels per day) | [1] | 2,269 | 2,301 | 2,138 | ||||||||||||||||||||||||||||||
| Refining & Marketing | ||||||||||||||||||||||||||||||||||
| Refining & Marketing Operating Statistics | ||||||||||||||||||||||||||||||||||
| Refining & Marketing refined product sales volume (thousands of barrels per day) | [2] | 2,259 | 2,289 | 2,125 | ||||||||||||||||||||||||||||||
| Refining & Marketing gross margin (dollars per barrel) | $ / bbl | [4] | 11.26 | [3] | 15.25 | [3] | 15.05 | ||||||||||||||||||||||||||||
| Crude oil capacity utilization percent | [5] | 95.00% | 99.00% | 95.00% | ||||||||||||||||||||||||||||||
| Refinery throughputs (thousands of barrels per day) | [6] | 1,850 | 1,888 | 1,806 | ||||||||||||||||||||||||||||||
| Inter-refinery transfers | 83 | 46 | 43 | |||||||||||||||||||||||||||||||
| Sour crude oil throughput percent | 60.00% | 55.00% | 52.00% | |||||||||||||||||||||||||||||||
| WTI-priced crude oil throughput percent | 19.00% | 20.00% | 19.00% | |||||||||||||||||||||||||||||||
| Refined product yields (thousands of barrels per day) | [6] | 1,883 | 1,919 | 1,839 | ||||||||||||||||||||||||||||||
| Refinery direct operating costs (dollars per barrel): | ||||||||||||||||||||||||||||||||||
| Planned turnaround and major maintenance | $ / bbl | [7] | 1.83 | 1.13 | 1.80 | ||||||||||||||||||||||||||||||
| Depreciation and amortization | $ / bbl | [7] | 1.47 | 1.39 | 1.41 | ||||||||||||||||||||||||||||||
| Other manufacturing | $ / bbl | [7],[8] | 4.09 | 4.15 | 4.86 | ||||||||||||||||||||||||||||||
| Total | $ / bbl | [7] | 7.39 | 6.67 | 8.07 | ||||||||||||||||||||||||||||||
| Refining & Marketing | Crude oil refined | ||||||||||||||||||||||||||||||||||
| Refining & Marketing Operating Statistics | ||||||||||||||||||||||||||||||||||
| Refinery throughputs (thousands of barrels per day) | [6] | 1,699 | 1,711 | 1,622 | ||||||||||||||||||||||||||||||
| Refining & Marketing | Other charge and blendstocks | ||||||||||||||||||||||||||||||||||
| Refining & Marketing Operating Statistics | ||||||||||||||||||||||||||||||||||
| Refinery throughputs (thousands of barrels per day) | [6] | 151 | 177 | 184 | ||||||||||||||||||||||||||||||
| Refining & Marketing | Gasoline | ||||||||||||||||||||||||||||||||||
| Refining & Marketing Operating Statistics | ||||||||||||||||||||||||||||||||||
| Refined product yields (thousands of barrels per day) | [6] | 900 | 913 | 869 | ||||||||||||||||||||||||||||||
| Refining & Marketing | Distillates | ||||||||||||||||||||||||||||||||||
| Refining & Marketing Operating Statistics | ||||||||||||||||||||||||||||||||||
| Refined product yields (thousands of barrels per day) | [6] | 617 | 603 | 580 | ||||||||||||||||||||||||||||||
| Refining & Marketing | Propane | ||||||||||||||||||||||||||||||||||
| Refining & Marketing Operating Statistics | ||||||||||||||||||||||||||||||||||
| Refined product yields (thousands of barrels per day) | [6] | 35 | 36 | 35 | ||||||||||||||||||||||||||||||
| Refining & Marketing | Feedstocks and special products | ||||||||||||||||||||||||||||||||||
| Refining & Marketing Operating Statistics | ||||||||||||||||||||||||||||||||||
| Refined product yields (thousands of barrels per day) | [6] | 241 | 281 | 276 | ||||||||||||||||||||||||||||||
| Refining & Marketing | Heavy fuel oil | ||||||||||||||||||||||||||||||||||
| Refining & Marketing Operating Statistics | ||||||||||||||||||||||||||||||||||
| Refined product yields (thousands of barrels per day) | [6] | 32 | 31 | 25 | ||||||||||||||||||||||||||||||
| Refining & Marketing | Asphalt | ||||||||||||||||||||||||||||||||||
| Refining & Marketing Operating Statistics | ||||||||||||||||||||||||||||||||||
| Refined product yields (thousands of barrels per day) | [6] | 58 | 55 | 54 | ||||||||||||||||||||||||||||||
| Refining & Marketing | Gulf Coast: | ||||||||||||||||||||||||||||||||||
| Refining & Marketing Operating Statistics | ||||||||||||||||||||||||||||||||||
| Refinery throughputs (thousands of barrels per day) | [9] | 1,234 | 1,244 | 1,173 | ||||||||||||||||||||||||||||||
| Sour crude oil throughput percent | 73.00% | 68.00% | 64.00% | |||||||||||||||||||||||||||||||
| WTI-priced crude oil throughput percent | 8.00% | 6.00% | 3.00% | |||||||||||||||||||||||||||||||
| Refined product yields (thousands of barrels per day) | [9] | 1,261 | 1,269 | 1,199 | ||||||||||||||||||||||||||||||
| Refinery direct operating costs (dollars per barrel): | ||||||||||||||||||||||||||||||||||
| Planned turnaround and major maintenance | $ / bbl | [7] | 2.09 | 0.81 | 1.82 | ||||||||||||||||||||||||||||||
| Depreciation and amortization | $ / bbl | [7] | 1.14 | 1.09 | 1.15 | ||||||||||||||||||||||||||||||
| Other manufacturing | $ / bbl | [7],[8] | 3.70 | 3.88 | 4.73 | ||||||||||||||||||||||||||||||
| Total | $ / bbl | [7] | 6.93 | 5.78 | 7.70 | ||||||||||||||||||||||||||||||
| Refining & Marketing | Gulf Coast: | Crude oil refined | ||||||||||||||||||||||||||||||||||
| Refining & Marketing Operating Statistics | ||||||||||||||||||||||||||||||||||
| Refinery throughputs (thousands of barrels per day) | [9] | 1,039 | 1,060 | 991 | ||||||||||||||||||||||||||||||
| Refining & Marketing | Gulf Coast: | Other charge and blendstocks | ||||||||||||||||||||||||||||||||||
| Refining & Marketing Operating Statistics | ||||||||||||||||||||||||||||||||||
| Refinery throughputs (thousands of barrels per day) | [9] | 195 | 184 | 182 | ||||||||||||||||||||||||||||||
| Refining & Marketing | Gulf Coast: | Gasoline | ||||||||||||||||||||||||||||||||||
| Refining & Marketing Operating Statistics | ||||||||||||||||||||||||||||||||||
| Refined product yields (thousands of barrels per day) | [9] | 514 | 534 | 508 | ||||||||||||||||||||||||||||||
| Refining & Marketing | Gulf Coast: | Distillates | ||||||||||||||||||||||||||||||||||
| Refining & Marketing Operating Statistics | ||||||||||||||||||||||||||||||||||
| Refined product yields (thousands of barrels per day) | [9] | 399 | 392 | 368 | ||||||||||||||||||||||||||||||
| Refining & Marketing | Gulf Coast: | Propane | ||||||||||||||||||||||||||||||||||
| Refining & Marketing Operating Statistics | ||||||||||||||||||||||||||||||||||
| Refined product yields (thousands of barrels per day) | [9] | 26 | 26 | 23 | ||||||||||||||||||||||||||||||
| Refining & Marketing | Gulf Coast: | Feedstocks and special products | ||||||||||||||||||||||||||||||||||
| Refining & Marketing Operating Statistics | ||||||||||||||||||||||||||||||||||
| Refined product yields (thousands of barrels per day) | [9] | 286 | 286 | 274 | ||||||||||||||||||||||||||||||
| Refining & Marketing | Gulf Coast: | Heavy fuel oil | ||||||||||||||||||||||||||||||||||
| Refining & Marketing Operating Statistics | ||||||||||||||||||||||||||||||||||
| Refined product yields (thousands of barrels per day) | [9] | 21 | 15 | 13 | ||||||||||||||||||||||||||||||
| Refining & Marketing | Gulf Coast: | Asphalt | ||||||||||||||||||||||||||||||||||
| Refining & Marketing Operating Statistics | ||||||||||||||||||||||||||||||||||
| Refined product yields (thousands of barrels per day) | [9] | 15 | 16 | 13 | ||||||||||||||||||||||||||||||
| Refining & Marketing | Midwest: | ||||||||||||||||||||||||||||||||||
| Refining & Marketing Operating Statistics | ||||||||||||||||||||||||||||||||||
| Refinery throughputs (thousands of barrels per day) | [9] | 699 | 690 | 676 | ||||||||||||||||||||||||||||||
| Sour crude oil throughput percent | 40.00% | 34.00% | 33.00% | |||||||||||||||||||||||||||||||
| WTI-priced crude oil throughput percent | 38.00% | 43.00% | 44.00% | |||||||||||||||||||||||||||||||
| Refined product yields (thousands of barrels per day) | [9] | 705 | 696 | 683 | ||||||||||||||||||||||||||||||
| Refinery direct operating costs (dollars per barrel): | ||||||||||||||||||||||||||||||||||
| Planned turnaround and major maintenance | $ / bbl | [7] | 1.15 | 1.64 | 1.66 | ||||||||||||||||||||||||||||||
| Depreciation and amortization | $ / bbl | [7] | 1.88 | 1.83 | 1.78 | ||||||||||||||||||||||||||||||
| Other manufacturing | $ / bbl | [7],[8] | 4.29 | 4.36 | 4.76 | ||||||||||||||||||||||||||||||
| Total | $ / bbl | [7] | 7.32 | 7.83 | 8.20 | ||||||||||||||||||||||||||||||
| Refining & Marketing | Midwest: | Crude oil refined | ||||||||||||||||||||||||||||||||||
| Refining & Marketing Operating Statistics | ||||||||||||||||||||||||||||||||||
| Refinery throughputs (thousands of barrels per day) | [9] | 660 | 651 | 631 | ||||||||||||||||||||||||||||||
| Refining & Marketing | Midwest: | Other charge and blendstocks | ||||||||||||||||||||||||||||||||||
| Refining & Marketing Operating Statistics | ||||||||||||||||||||||||||||||||||
| Refinery throughputs (thousands of barrels per day) | [9] | 39 | 39 | 45 | ||||||||||||||||||||||||||||||
| Refining & Marketing | Midwest: | Gasoline | ||||||||||||||||||||||||||||||||||
| Refining & Marketing Operating Statistics | ||||||||||||||||||||||||||||||||||
| Refined product yields (thousands of barrels per day) | [9] | 386 | 379 | 361 | ||||||||||||||||||||||||||||||
| Refining & Marketing | Midwest: | Distillates | ||||||||||||||||||||||||||||||||||
| Refining & Marketing Operating Statistics | ||||||||||||||||||||||||||||||||||
| Refined product yields (thousands of barrels per day) | [9] | 218 | 211 | 212 | ||||||||||||||||||||||||||||||
| Refining & Marketing | Midwest: | Propane | ||||||||||||||||||||||||||||||||||
| Refining & Marketing Operating Statistics | ||||||||||||||||||||||||||||||||||
| Refined product yields (thousands of barrels per day) | [9] | 11 | 12 | 13 | ||||||||||||||||||||||||||||||
| Refining & Marketing | Midwest: | Feedstocks and special products | ||||||||||||||||||||||||||||||||||
| Refining & Marketing Operating Statistics | ||||||||||||||||||||||||||||||||||
| Refined product yields (thousands of barrels per day) | [9] | 35 | 38 | 43 | ||||||||||||||||||||||||||||||
| Refining & Marketing | Midwest: | Heavy fuel oil | ||||||||||||||||||||||||||||||||||
| Refining & Marketing Operating Statistics | ||||||||||||||||||||||||||||||||||
| Refined product yields (thousands of barrels per day) | [9] | 12 | 17 | 13 | ||||||||||||||||||||||||||||||
| Refining & Marketing | Midwest: | Asphalt | ||||||||||||||||||||||||||||||||||
| Refining & Marketing Operating Statistics | ||||||||||||||||||||||||||||||||||
| Refined product yields (thousands of barrels per day) | [9] | 43 | 39 | 41 | ||||||||||||||||||||||||||||||
| Speedway | ||||||||||||||||||||||||||||||||||
| Speedway Operating Statistics(j) | ||||||||||||||||||||||||||||||||||
| Convenience stores at period-end | Store | [10] | 2,733 | 2,766 | 2,746 | ||||||||||||||||||||||||||||||
| Gasoline and distillate sales (millions of gallons) | gal | [10] | 6,094 | 6,038 | 3,942 | ||||||||||||||||||||||||||||||
| Gasoline and distillate gross margin (dollars per gallon) | $ / gal | [10],[11] | 0.1656 | [3] | 0.1823 | [3] | 0.1775 | ||||||||||||||||||||||||||||
| Merchandise sales (in millions) | $ | [10] | $ 5,007 | $ 4,879 | $ 3,611 | ||||||||||||||||||||||||||||||
| Merchandise gross margin (in millions) | $ | [10] | $ 1,435 | $ 1,368 | $ 975 | ||||||||||||||||||||||||||||||
| Merchandise margin percent | [10] | 28.70% | 28.00% | 27.00% | ||||||||||||||||||||||||||||||
| Same store gasoline sales volume (period over period) percentage | [10] | (0.40%) | (0.30%) | (0.70%) | ||||||||||||||||||||||||||||||
| Merchandise sales excluding cigarettes (period over period) percentage | [10],[12] | 3.20% | 4.10% | 5.00% | ||||||||||||||||||||||||||||||
| Midstream | ||||||||||||||||||||||||||||||||||
| Midstream Operating Statistics | ||||||||||||||||||||||||||||||||||
| Crude oil and refined product pipeline throughputs (thousands of barrels per day) | [13] | 2,311 | 2,191 | 2,119 | ||||||||||||||||||||||||||||||
| Gathering system throughput (million cubic feet per day) | CFPD | [14] | 3,275 | 3,075 | |||||||||||||||||||||||||||||||
| Natural gas processed (million cubic feet per day) | CFPD | [14] | 5,761 | 5,468 | |||||||||||||||||||||||||||||||
| C2 (ethane) and NGLs (natural gas liquids) fractionated (mbpd) | [14] | 335 | 307 | |||||||||||||||||||||||||||||||
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