10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2022

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                      to                     

Commission file number 001-35054

Marathon Petroleum Corporation

(Exact name of registrant as specified in its charter)

    

Delaware	27-1284632
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

539 South Main Street, Findlay, Ohio 45840-3229

(Address of principal executive offices) (Zip code)

(419) 422-2121

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act
Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, par value $.01	MPC	New York Stock Exchange

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes  ☑    No  ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files.) Yes  ☑    No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large Accelerated Filer  ☑    Accelerated Filer ☐    Non-accelerated Filer ☐     Smaller reporting company ☐

Emerging growth company    ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act  ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act) Yes  ☐   No  ☑

There were 468,660,833 shares of Marathon Petroleum Corporation common stock outstanding as of October 28, 2022.

Table of Contents

		Page
PART I - FINANCIAL INFORMATION
Item 1.	Financial Statements:
	Consolidated Statements of Income (Unaudited)	3
	Consolidated Statements of Comprehensive Income (Unaudited)	4
	Consolidated Balance Sheets (Unaudited)	5
	Consolidated Statements of Cash Flows (Unaudited)	6
	Consolidated Statements of Equity and Redeemable Noncontrolling Interest (Unaudited)	8
	Notes to the Consolidated Financial Statements (Unaudited)	10
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	28
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	49
Item 4.	Controls and Procedures	51
PART II - OTHER INFORMATION
Item 1.	Legal Proceedings	52
Item 1A.	Risk Factors	52
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	53
Item 6.	Exhibits	54
	Signatures	56

Unless otherwise stated or the context otherwise indicates, all references in this Form 10-Q to “MPC,” “us,” “our,” “we” or “the Company” mean Marathon Petroleum Corporation and its consolidated subsidiaries.

1

Glossary of Terms

Throughout this report, the following company or industry specific terms and abbreviations are used:

ANS	Alaska North Slope crude oil, an oil index benchmark price
ASC	Accounting Standards Codification
ASU	Accounting Standards Update
barrel	One stock tank barrel, or 42 U.S. gallons liquid volume, used in reference to crude oil or other liquid hydrocarbons
CARB	California Air Resources Board
CARBOB	California Reformulated Gasoline Blendstock for Oxygenate Blending
CBOB	Conventional Blending for Oxygenate Blending
EBITDA	Earnings Before Interest, Tax, Depreciation and Amortization (a non-GAAP financial measure)
EPA	U.S. Environmental Protection Agency
FASB	Financial Accounting Standards Board
GAAP	Accounting principles generally accepted in the United States
LCM	Lower of cost or market
LIFO	Last in, first out, an inventory costing method
mbpd	Thousand barrels per day
MEH	Magellan East Houston crude oil, an oil index benchmark price
MMBtu	One million British thermal units, an energy measurement
NGL	Natural gas liquids, such as ethane, propane, butanes and natural gasoline
NYMEX	New York Mercantile Exchange
PP&E	Property, plant and equipment
RFS2	Revised Renewable Fuel Standard program, as required by the Energy Independence and Security Act of 2007
RIN	Renewable Identification Number
SEC	U.S. Securities and Exchange Commission
SOFR	Secured overnight financing rate
ULSD	Ultra-low sulfur diesel
USGC	U.S. Gulf Coast
VIE	Variable interest entity
WTI	West Texas Intermediate crude oil, an oil index benchmark price

2

PART I – FINANCIAL INFORMATION

Item 1. Financial Statements

Marathon Petroleum Corporation

Consolidated Statements of Income (Unaudited)

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(In millions, except per share data)	2022		2021		2022		2021
Revenues and other income:
Sales and other operating revenues	$	45,787	$	32,321	$	137,640	$	84,647
Income from equity method investments	180		122		469		306
Net gain on disposal of assets	1,051		—		1,072		3
Other income	219		170		678		366
Total revenues and other income	47,237		32,613		139,859		85,322
Costs and expenses:
Cost of revenues (excludes items below)	38,821		29,563		118,096		77,824
Depreciation and amortization	794		836		2,418		2,551
Selling, general and administrative expenses	712		681		2,009		1,881
Other taxes	224		193		606		544
Total costs and expenses	40,551		31,273		123,129		82,800
Income from continuing operations	6,686		1,340		16,730		2,522
Net interest and other financial costs	240		328		814		1,053
Income from continuing operations before income taxes	6,446		1,012		15,916		1,469
Provision (benefit) for income taxes on continuing operations	1,426		(18)		3,507		21
Income from continuing operations, net of tax	5,020		1,030		12,409		1,448
Income from discontinued operations, net of tax	—		—		—		8,448
Net income	5,020		1,030		12,409		9,896
Less net income attributable to:
Redeemable noncontrolling interest	23		38		65		79
Noncontrolling interests	520		298		1,149		853
Net income attributable to MPC	$	4,477	$	694	$	11,195	$	8,964
Per share data (See Note 8)
Basic:
Continuing operations	$	9.12	$	1.10	$	21.18	$	0.80
Discontinued operations	—		—		—		13.10
Net income per share	$	9.12	$	1.10	$	21.18	$	13.90
Weighted average shares outstanding	491		633		528		645
Diluted:
Continuing operations	$	9.06	$	1.09	$	21.04	$	0.79
Discontinued operations	—		—		—		13.02
Net income per share	$	9.06	$	1.09	$	21.04	$	13.81
Weighted average shares outstanding	494		637		532		649

The accompanying notes are an integral part of these consolidated financial statements.

3

Marathon Petroleum Corporation

Consolidated Statements of Comprehensive Income (Unaudited)

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(Millions of dollars)	2022		2021		2022		2021
Net income	$	5,020	$	1,030	$	12,409	$	9,896
Defined benefit plans:
Actuarial changes, net of tax of $(34), $1, $(23) and $65, respectively	(104)		4		(71)		196
Prior service, net of tax of $(5), $(3), $(13) and $(8), respectively	(13)		(8)		(38)		(24)
Other, net of tax of $1, $—, $(1) and $(2), respectively	3		—		(3)		(4)
Other comprehensive income (loss)	(114)		(4)		(112)		168
Comprehensive income	4,906		1,026		12,297		10,064
Less comprehensive income attributable to:
Redeemable noncontrolling interest	23		38		65		79
Noncontrolling interests	520		298		1,149		853
Comprehensive income attributable to MPC	$	4,363	$	690	$	11,083	$	9,132

The accompanying notes are an integral part of these consolidated financial statements.

4

Marathon Petroleum Corporation

Consolidated Balance Sheets (Unaudited)

(Millions of dollars, except share data)	September 30, 2022		December 31, 2021
Assets
Cash and cash equivalents	$	7,376	$	5,291
Short-term investments	3,759		5,548
Receivables, less allowance for doubtful accounts of $39 and $40, respectively	13,458		11,034
Inventories	9,834		8,055
Other current assets	858		568
Total current assets	35,285		30,496
Equity method investments	6,493		5,409
Property, plant and equipment, net	35,384		37,440
Goodwill	8,244		8,256
Right of use assets	1,200		1,372
Other noncurrent assets	3,088		2,400
Total assets	$	89,694	$	85,373
Liabilities
Accounts payable	$	16,682	$	13,700
Payroll and benefits payable	773		911
Accrued taxes	1,042		1,231
Debt due within one year	1,064		571
Operating lease liabilities	355		438
Other current liabilities	1,398		1,047
Total current liabilities	21,314		17,898
Long-term debt	25,638		24,968
Deferred income taxes	5,610		5,638
Defined benefit postretirement plan obligations	1,305		1,015
Long-term operating lease liabilities	839		927
Deferred credits and other liabilities	1,213		1,346
Total liabilities	55,919		51,792
Commitments and contingencies (see Note 24)
Redeemable noncontrolling interest	967		965
Equity
Preferred stock, no shares issued and outstanding (par value $0.01 per share, 30 million shares authorized)	—		—
Common stock:
Issued – 989 million and 984 million shares (par value $0.01 per share, 2 billion shares authorized)	10		10
Held in treasury, at cost – 520 million and 405 million shares	(30,065)		(19,904)
Additional paid-in capital	33,363		33,262
Retained earnings	23,175		12,905
Accumulated other comprehensive loss	(179)		(67)
Total MPC stockholders’ equity	26,304		26,206
Noncontrolling interests	6,504		6,410
Total equity	32,808		32,616
Total liabilities, redeemable noncontrolling interest and equity	$	89,694	$	85,373

The accompanying notes are an integral part of these consolidated financial statements.

5

Marathon Petroleum Corporation

Consolidated Statements of Cash Flows (Unaudited)

	Nine Months Ended  September 30,
(Millions of dollars)	2022		2021
Operating activities:
Net income	$	12,409	$	9,896
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of deferred financing costs and debt discount	45		59
Depreciation and amortization	2,418		2,551
Pension and other postretirement benefits, net	135		(535)
Deferred income taxes	38		(175)
Net gain on disposal of assets	(1,072)		(3)
Income from equity method investments	(469)		(306)
Distributions from equity method investments	544		466
Income from discontinued operations	—		(8,448)
Changes in income tax receivable	(142)		535
Changes in the fair value of derivative instruments	(148)		(11)
Changes in:
Current receivables	(2,371)		(3,765)
Inventories	(1,795)		(1,206)
Current accounts payable and accrued liabilities	3,045		4,670
Right of use assets and operating lease liabilities, net	1		5
All other, net	(615)		(187)
Cash provided by operating activities - continuing operations	12,023		3,546
Cash used in operating activities - discontinued operations	(44)		(2,860)
Net cash provided by operating activities	11,979		686
Investing activities:
Additions to property, plant and equipment	(1,694)		(983)
Acquisitions, net of cash acquired	(74)		—
Disposal of assets	79		98
Investments – acquisitions and contributions	(215)		(150)
– redemptions, repayments and return of capital	511		39
Purchases of short-term investments	(3,735)		(9,457)
Sales of short-term investments	1,140		455
Maturities of short-term investments	4,396		1,652
All other, net	713		381
Cash provided by (used in) investing activities - continuing operations	1,121		(7,965)
Cash provided by investing activities - discontinued operations	—		21,314
Net cash provided by investing activities	1,121		13,349
Financing activities:
Commercial paper – issued	—		7,414
– repayments	—		(8,437)
Long-term debt – borrowings	3,379		10,975
– repayments	(2,258)		(14,274)
Debt issuance costs	(39)		—
Issuance of common stock	184		71
Common stock repurchased	(10,085)		(1,912)

6

	Nine Months Ended  September 30,
(Millions of dollars)	2022		2021
Dividends paid	(928)		(1,130)
Distributions to noncontrolling interests	(908)		(923)
Repurchases of noncontrolling interests	(315)		(465)
All other, net	(41)		(35)
Net cash used in financing activities	(11,011)		(8,716)
Net change in cash, cash equivalents and restricted cash	$	2,089	$	5,319
Cash, cash equivalents and restricted cash balances:(a)
Continuing operations - beginning of period	$	5,294	$	416
Discontinued operations - beginning of period	—		140
Less: Discontinued operations - end of period	—		—
Continuing operations - end of period	$	7,383	$	5,875

(a)Restricted cash is included in other current assets on our consolidated balance sheets.

The accompanying notes are an integral part of these consolidated financial statements.

7

Marathon Petroleum Corporation

Consolidated Statements of Equity and Redeemable Noncontrolling Interest (Unaudited)

	MPC Stockholders’ Equity
	Common Stock			Treasury Stock			Additional Paid-in Capital		Retained Earnings		Accumulated Other Comprehensive Income (Loss)		Non-controlling Interests		Total Equity		Redeemable Non-controlling Interest
(Shares in millions; amounts in millions of dollars)	Shares	Amount		Shares	Amount
Balance as of December 31, 2021	984	$	10	(405)	$	(19,904)	$	33,262	$	12,905	$	(67)	$	6,410	$	32,616	$	965
Net income	—	—		—	—		—		845		—		306		1,151		21
Dividends declared on common stock ($0.58 per share)	—	—		—	—		—		(330)		—		—		(330)		—
Distributions to noncontrolling interests	—	—		—	—		—		—		—		(290)		(290)		(21)
Other comprehensive loss	—	—		—	—		—		—		(7)		—		(7)		—
Shares repurchased	—	—		(37)	(2,807)		—		—		—		—		(2,807)		—
Stock-based compensation	3	—		—	—		90		—		—		(1)		89		—
Equity transactions of MPLX	—	—		—	—		(25)		—		—		(63)		(88)		—
Balance as of March 31, 2022	987	$	10	(442)	$	(22,711)	$	33,327	$	13,420	$	(74)	$	6,362	$	30,334	$	965
Net income	—	—		—	—		—		5,873		—		323		6,196		21
Dividends declared on common stock ($0.58 per share)	—	—		—	—		—		(310)		—		—		(310)		—
Distributions to noncontrolling interests	—	—		—	—		—		—		—		(267)		(267)		(21)
Other comprehensive income	—	—		—	—		—		—		9		—		9		—
Shares repurchased	—	—		(34)	(3,285)		—		—		—		—		(3,285)		—
Stock-based compensation	2	—		—	(4)		71		—		—		2		69		—
Equity transactions of MPLX	—	—		—	—		(20)		—		—		(22)		(42)		—
Balance as of June 30, 2022	989	$	10	(476)	$	(26,000)	$	33,378	$	18,983	$	(65)	$	6,398	$	32,704	$	965
Net income	—	—		—	—		—		4,477		—		520		4,997		23
Dividends declared on common stock ($0.58 per share)	—	—		—	—		—		(285)		—		—		(285)		—
Distributions to noncontrolling interests	—	—		—	—		—		—		—		(288)		(288)		(21)
Other comprehensive loss	—	—		—	—		—		—		(114)		—		(114)		—
Shares repurchased	—	—		(44)	(4,065)		—		—		—		—		(4,065)		—
Stock-based compensation	—	—		—	—		29		—		—		3		32		—
Equity transactions of MPLX	—	—		—	—		(44)		—		—		(129)		(173)		—
Balance as of September 30, 2022	989	$	10	(520)	$	(30,065)	$	33,363	$	23,175	$	(179)	$	6,504	$	32,808	$	967

8

Marathon Petroleum Corporation

Consolidated Statements of Equity and Redeemable Noncontrolling Interest (Unaudited)

	MPC Stockholders’ Equity
	Common Stock			Treasury Stock			Additional Paid-in Capital		Retained Earnings		Accumulated Other Comprehensive Income (Loss)		Non-controlling Interests		Total Equity		Redeemable Non-controlling Interest
(Shares in millions; amounts in millions of dollars)	Shares	Amount		Shares	Amount
Balance as of December 31, 2020	980	$	10	(329)	$	(15,157)	$	33,208	$	4,650	$	(512)	$	7,053	$	29,252	$	968
Net income (loss)	—	—		—	—		—		(242)		—		286		44		20
Dividends declared on common stock ($0.58 per share)	—	—		—	—		—		(379)		—		—		(379)		—
Distributions to noncontrolling interests	—	—		—	—		—		—		—		(300)		(300)		(20)
Other comprehensive income	—	—		—	—		—		—		1		—		1		—
Stock-based compensation	1	—		—	(1)		18		—		—		—		17		—
Equity transactions of MPLX	—	—		—	—		(4)		—		—		(120)		(124)		—
Balance as of March 31, 2021	981	$	10	(329)	$	(15,158)	$	33,222	$	4,029	$	(511)	$	6,919	$	28,511	$	968
Net income	—	—		—	—		—		8,512		—		269		8,781		21
Dividends declared on common stock ($0.58 per share)	—	—		—	—		—		(381)		—		—		(381)		—
Distributions to noncontrolling interests	—	—		—	—		—		—		—		(272)		(272)		(21)
Other comprehensive income	—	—		—	—		—		—		171		—		171		—
Shares repurchased	—	—		(16)	(984)		—		—		—		—		(984)		—
Stock-based compensation	2	—		—	(5)		50		—		—		2		47		—
Equity transactions of MPLX	—	—		—	—		(34)		—		—		(114)		(148)		—
Balance as of June 30, 2021	983	$	10	(345)	$	(16,147)	$	33,238	$	12,160	$	(340)	$	6,804	$	35,725	$	968
Net income	—	—		—	—		$	—	694		—		298		992		38
Dividends declared on common stock ($0.58 per share)	—	—		—	—		—		(370)		—		—		(370)		—
Distributions to noncontrolling interests	—	—		—	—		—		—		—		(290)		(290)		(20)
Other comprehensive loss	—	—		—	—		—		—		(4)		—		(4)		—
Shares repurchased	—	—		(16)	(978)		—		—		—		—		(978)		—
Stock-based compensation	—	—		—	(1)		32		—		—		2		33		—
Equity transactions of MPLX	—	—		—	—		(14)		—		—		(116)		(130)		—
Balance as of September 30, 2021	983	$	10	(361)	$	(17,126)	$	33,256	$	12,484	$	(344)	$	6,698	$	34,978	$	986

The accompanying notes are an integral part of these consolidated financial statements.

9

Notes to Consolidated Financial Statements (Unaudited)

1. Description of the Business and Basis of Presentation

Description of the Business

We are a leading, integrated, downstream energy company headquartered in Findlay, Ohio. We operate the nation's largest refining system. We sell refined products to wholesale marketing customers domestically and internationally, to buyers on the spot market and to independent entrepreneurs who operate branded outlets. We also sell transportation fuel to consumers through direct dealer locations under long-term supply contracts. MPC’s midstream operations are primarily conducted through MPLX LP (“MPLX”), which owns and operates crude oil and light product transportation and logistics infrastructure as well as gathering, processing and fractionation assets. We own the general partner and a majority limited partner interest in MPLX. See Note 5.

Basis of Presentation

All significant intercompany transactions and accounts have been eliminated.

These interim consolidated financial statements are unaudited; however, in the opinion of our management, these statements reflect all adjustments necessary for a fair statement of the results for the periods reported. All such adjustments are of a normal, recurring nature unless otherwise disclosed. These interim consolidated financial statements, including the notes, have been prepared in accordance with the rules of the SEC applicable to interim period financial statements and do not include all of the information and disclosures required by GAAP for complete financial statements. Certain information and disclosures derived from our audited annual financial statements, prepared in accordance with GAAP, have been condensed or omitted from these interim financial statements.

These interim consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2021. The results of operations for the three and nine months ended September 30, 2022 are not necessarily indicative of the results to be expected for the full year.

2. Accounting Standards

Recently Adopted

ASU 2021-10, Government Assistance (Topic 832): Disclosures by Business Entities about Government Assistance

In November 2021, the FASB issued guidance requiring disclosures for certain types of government assistance that have been accounted for by analogy to grant or contribution models. Disclosures will include information about the type of transactions, accounting and the impact on financial statements. We prospectively adopted this standard in the first quarter of 2022. The adoption of this standard did not have a material impact on our financial statements or disclosures.

3. Short-Term Investments

Investments Components

The components of investments were as follows:

	September 30, 2022
(Millions of dollars)	Fair Value Level	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value		Cash and Cash Equivalents		Short-term Investments
Available-for-sale debt securities
Commercial paper	Level 2	$	2,860	$	—	$	(3)	$	2,857	$	604	$	2,253
Certificates of deposit and time deposits	Level 2	3,542		—		(2)		3,540		2,200		1,340
U.S. government securities	Level 1	566		—		—		566		416		150
Corporate notes and bonds	Level 2	16		—		—		16		—		16
Total available-for-sale debt securities		$	6,984	$	—	$	(5)	$	6,979	$	3,220	$	3,759
Cash								4,156		4,156		—
Total								$	11,135	$	7,376	$	3,759

10

	December 31, 2021
(Millions of dollars)	Fair Value Level	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value		Cash and Cash Equivalents		Short-term Investments
Available-for-sale debt securities
Commercial paper	Level 2	$	4,905	$	—	$	(1)	$	4,904	$	868	$	4,036
Certificates of deposit and time deposits	Level 2	2,024		—		—		2,024		750		1,274
U.S. government securities	Level 1	28		—		—		28		—		28
Corporate notes and bonds	Level 2	271		—		—		271		61		210
Total available-for-sale debt securities		$	7,228	$	—	$	(1)	$	7,227	$	1,679	$	5,548
Cash								3,612		3,612		—
Total								$	10,839	$	5,291	$	5,548

Our investment policy includes concentration limits and credit rating requirements which limits our investments to high quality, short term and highly liquid securities.

Unrealized losses on debt investments held from May 14, 2021, which coincides with the sale of Speedway, to September 30, 2022 were not material. Realized gains/losses were not material. All of our available-for-sale debt securities held as of September 30, 2022 mature within one year or less or are readily available for use.

4. Discontinued Operations

On May 14, 2021, we completed the sale of Speedway, our company-owned and operated retail transportation fuel and convenience store business, to 7-Eleven for cash proceeds of approximately $21.38 billion. After-tax proceeds were approximately $17.22 billion. This transaction resulted in a pretax gain of $11.68 billion ($8.02 billion after income taxes) after deducting the book value of the net assets and certain other adjustments.

The proceeds and related Speedway sale gain may be adjusted in future periods based on provisions of the purchase and sale agreement that allow for adjustments of working capital amounts and other miscellaneous items subsequent to the transaction closing date of May 14, 2021.

Results of operations for Speedway are reflected through the close of the sale. The following table presents Speedway results and the gain on sale as reported in income from discontinued operations, net of tax, within our consolidated statements of income.

	Three Months Ended		Nine Months Ended
(Millions of dollars)	September 30, 2021
Revenues, other income and net gain on disposal of assets:
Revenues and other income	$	—	$	8,420
Net gain on disposal of assets	—		11,682
Total revenues, other income and net gain on disposal of assets	—		20,102
Costs and expenses:
Cost of revenues (excludes items below)	—		7,654
Depreciation and amortization	—		3
Selling, general and administrative expenses	—		121
Other taxes	—		75
Total costs and expenses	—		7,853
Income from operations	—		12,249
Net interest and other financial costs	—		6
Income before income taxes	—		12,243
Provision for income taxes	—		3,795
Income from discontinued operations, net of tax	$	—	$	8,448

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Fuel Supply Agreements

During the second quarter of 2021, we entered into various 15-year fuel supply agreements through which we continue to supply fuel to Speedway.

5. Master Limited Partnership

We own the general partner and a majority limited partner interest in MPLX, which owns and operates crude oil and light product transportation and logistics infrastructure as well as gathering, processing and fractionation assets. We control MPLX through our ownership of the general partner interest. As of September 30, 2022, we owned approximately 64 percent of the outstanding MPLX common units.

Unit Repurchase Program

On November 2, 2020, MPLX announced the board authorization of a unit repurchase program for the repurchase of up to $1.0 billion of MPLX’s outstanding common units held by the public. On August 2, 2022, MPLX announced its board of directors approved an incremental $1.0 billion unit repurchase authorization. The unit repurchase authorizations have no expiration date. MPLX may utilize various methods to effect the repurchases, which could include open market repurchases, negotiated block transactions, accelerated unit repurchases, tender offers or open market solicitations for units, some of which may be effected through Rule 10b5-1 plans. The timing of repurchases will depend upon several factors, including market and business conditions, and repurchases may be discontinued at any time.

Total unit repurchases were as follows for the respective periods:

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(In millions, except per share data)	2022		2021		2022		2021
Number of common units repurchased	6		6		10		18
Cash paid for common units repurchased	$	180	$	155	$	315	$	465
Average cost per unit	$	31.65	$	28.41	$	31.98	$	26.79

As of September 30, 2022, MPLX had approximately $1.0 billion remaining under its unit repurchase authorizations, which reflects the repurchase of 532,326 common units for $16 million that were transacted in the third quarter of 2022 and settled in the fourth quarter of 2022.

Agreements

We have various long-term, fee-based commercial agreements with MPLX. Under these agreements, MPLX provides transportation, storage, distribution and marketing services to us. With certain exceptions, these agreements generally contain minimum volume commitments. These transactions are eliminated in consolidation but are reflected as intersegment transactions between our Refining & Marketing and Midstream segments. We also have agreements with MPLX that 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 but are reflected as intersegment transactions between our Corporate and Midstream segments.

Noncontrolling Interest

As a result of equity transactions of MPLX, we are required to adjust non-controlling interest and additional paid-in capital. Changes in MPC’s additional paid-in capital resulting from changes in its ownership interests in MPLX were as follows:

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(Millions of dollars)	2022		2021		2022		2021
Decrease due to change in ownership	$	(67)	$	(44)	$	(117)	$	(120)
Tax impact	23		30		28		68
Decrease in MPC's additional paid-in capital, net of tax	$	(44)	$	(14)	$	(89)	$	(52)

6. Variable Interest Entities

Consolidated VIE

We control MPLX through our ownership of its general partner. MPLX is a VIE because the limited partners do not have substantive kick-out or 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 ability, through our ownership of the general partner, to control the

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decisions that most significantly impact MPLX. We therefore consolidate MPLX and record a noncontrolling interest for the interest owned by the public. We also record a redeemable noncontrolling interest related to MPLX’s Series A preferred units.

The creditors of MPLX do not have recourse to MPC’s general credit through guarantees or other financial arrangements, except as noted. MPC has effectively guaranteed certain indebtedness of LOOP LLC (“LOOP”) and LOCAP LLC (“LOCAP”), in which MPLX holds an interest. See Note 24 for more information. The assets of MPLX can only be used to settle its own obligations and its creditors have no recourse to our assets, except as noted earlier.

The following table presents balance sheet information for the assets and liabilities of MPLX, which are included in our balance sheets.

(Millions of dollars)	September 30, 2022		December 31, 2021
Assets
Cash and cash equivalents	$	121	$	13
Receivables, less allowance for doubtful accounts	950		660
Inventories	151		142
Other current assets	43		55
Equity method investments	4,108		3,981
Property, plant and equipment, net	18,910		20,042
Goodwill	7,645		7,657
Right of use assets	288		268
Other noncurrent assets	1,689		891
Liabilities
Accounts payable	$	744	$	671
Payroll and benefits payable	4		6
Accrued taxes	102		75
Debt due within one year	982		499
Operating lease liabilities	44		59
Other current liabilities	308		304
Long-term debt	18,797		18,072
Deferred income taxes	14		10
Long-term operating lease liabilities	241		205
Deferred credits and other liabilities	306		559

7. Related Party Transactions

Transactions with related parties were as follows:

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(Millions of dollars)	2022		2021		2022		2021
Sales to related parties	$	16	$	13	$	56	$	67
Purchases from related parties	315		251		894		673

Sales to related parties, which are included in sales and other operating revenues, consist primarily of refined product sales to certain of our equity affiliates.

Purchases from related parties are included in cost of revenues. We obtain utilities, transportation services and purchase ethanol from certain of our equity affiliates.

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8. Earnings Per Share

We compute basic earnings per share by dividing net income attributable to MPC less income allocated to participating securities by the weighted average number of shares of common stock outstanding. Since MPC grants certain incentive compensation awards to employees and non-employee directors that are considered to be participating securities, we have calculated our earnings per share using the two-class method. Diluted income per share assumes exercise of certain stock-based compensation awards, provided the effect is not anti-dilutive.

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(In millions, except per share data)	2022		2021		2022		2021
Income from continuing operations, net of tax	$	5,020	$	1,030	$	12,409	$	1,448
Less: Net income attributable to noncontrolling interest	543		336		1,214		932
Net income allocated to participating securities	2		—		6		1
Income from continuing operations available to common stockholders	4,475		694		11,189		515
Income from discontinued operations, net of tax	—		—		—		8,448
Income available to common stockholders	$	4,475	$	694	$	11,189	$	8,963
Weighted average common shares outstanding:
Basic	491		633		528		645
Effect of dilutive securities	3		4		4		4
Diluted	494		637		532		649
Income available to common stockholders per share:
Basic:
Continuing operations	$	9.12	$	1.10	$	21.18	$	0.80
Discontinued operations	—		—		—		13.10
Net income per share	$	9.12	$	1.10	$	21.18	$	13.90
Diluted:
Continuing operations	$	9.06	$	1.09	$	21.04	$	0.79
Discontinued operations	—		—		—		13.02
Net income per share	$	9.06	$	1.09	$	21.04	$	13.81

The following table summarizes the shares that were anti-dilutive and, therefore, were excluded from the diluted share calculation.

	Three Months Ended  September 30,		Nine Months Ended  September 30,
(In millions)	2022	2021	2022	2021
Shares issuable under stock-based compensation plans	—	3	—	3

9. Equity

On August 2, 2022, we announced our board of directors approved an incremental $5.0 billion share repurchase authorization bringing total share repurchase authorizations announced in 2022 to $10.0 billion. The authorizations have no expiration date.

We may utilize various methods to effect the repurchases, which could include open market repurchases, negotiated block transactions, tender offers, accelerated share repurchases or open market solicitations for shares, some of which may be effected 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 suspended or discontinued at any time.

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Total share repurchases were as follows for the respective periods:

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(In millions, except per share data)	2022		2021		2022		2021
Number of shares repurchased	44		16		115		32
Cash paid for shares repurchased	$	3,908	$	928	$	10,085	$	1,912
Average cost per share	$	92.54	$	58.78	$	88.07	$	60.91

As of September 30, 2022, MPC had $5.11 billion remaining under its share repurchase authorizations, which reflects the repurchase of 1,577,829 common shares for $157 million that were transacted in the third quarter of 2022 and settled in the fourth quarter of 2022.

10. Segment Information

We have two reportable segments: Refining & Marketing and Midstream. Each of these segments is organized and managed based upon the nature of the products and services it offers.

•Refining & Marketing – refines crude oil and other feedstocks, including renewable feedstocks, at our refineries in the Gulf Coast, Mid-Continent and West Coast regions of the United States, purchases refined products and ethanol for resale and distributes refined products, including renewable diesel, through transportation, storage, distribution and marketing services provided largely by our Midstream segment. We sell refined products to wholesale marketing customers domestically and internationally, to buyers on the spot market, to independent entrepreneurs who operate primarily Marathon® branded outlets and through long-term fuel supply contracts with direct dealers who operate locations mainly under the ARCO® brand.

•Midstream – transports, stores, distributes and markets crude oil and refined products principally for the Refining & Marketing segment via refining logistics assets, pipelines, terminals, towboats and barges; gathers, processes and transports natural gas; and gathers, transports, fractionates, stores and markets NGLs. The Midstream segment primarily reflects the results of MPLX.

During the first quarter of 2022, our chief operating decision maker (“CODM”) began to evaluate the performance of our segments using segment adjusted EBITDA. We have modified our presentation of segment performance to be consistent with this change, including prior periods presented for consistent and comparable presentation. Amounts included in income from continuing operations before income taxes and excluded from segment adjusted EBITDA include: (i) depreciation and amortization; (ii) net interest and other financial costs; (iii) turnaround expenses and (iv) other adjustments as deemed necessary. These items are either: (i) believed to be non-recurring in nature; (ii) not believed to be allocable or controlled by the segment; or (iii) are not tied to the operational performance of the segment. Assets by segment are not a measure used to assess the performance of the company by the CODM and thus are not reported in our disclosures.

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	Three Months Ended  September 30,				Nine Months Ended  September 30,
(Millions of dollars)	2022		2021		2022		2021
Segment adjusted EBITDA for reportable segments
Refining & Marketing	$	5,496	$	1,195	$	14,630	$	1,969
Midstream	1,498		1,375		4,357		4,005
Total reportable segments	$	6,994	$	2,570	$	18,987	$	5,974
Reconciliation of segment adjusted EBITDA for reportable segments to income from continuing operations before income taxes
Total reportable segments	$	6,994	$	2,570	$	18,987	$	5,974
Corporate	(160)		(154)		(454)		(428)
Refining planned turnaround costs	(384)		(205)		(680)		(378)
Storm impacts	—		(23)		—		(70)
LIFO inventory charge	(28)		—		(28)		—
Gain on sale of assets(a)	1,058		—		1,058		—
Renewable volume obligation requirements	—		—		238		—
Litigation	—		—		27		—
Impairments(b)	—		—		—		(13)
Idling expenses	—		(12)		—		(12)
Depreciation and amortization(c)	(794)		(836)		(2,418)		(2,551)
Net interest and other financial costs	(240)		(328)		(814)		(1,053)
Income from continuing operations before income taxes	$	6,446	$	1,012	$	15,916	$	1,469

(a)    Includes the non-cash gain related to the contribution of assets by MPC on the formation of the Martinez Renewable joint venture and the non-cash gain on lease reclassification. See Note 14 and 23 for additional information.

(b)    Impairment of equity method investments.

(c)    The three and nine months ended September 30, 2021 includes $13 million and $56 million, respectively, of impairments of long lived assets.

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(Millions of dollars)	2022		2021		2022		2021
Sales and other operating revenues
Refining & Marketing
Revenues from external customers(a)	$	44,355	$	31,109	$	133,447	$	81,324
Intersegment revenues	13		37		96		95
Refining & Marketing segment revenues	44,368		31,146		133,543		81,419
Midstream
Revenues from external customers(a)	1,432		1,212		4,193		3,323
Intersegment revenues	1,326		1,242		3,881		3,689
Midstream segment revenues	2,758		2,454		8,074		7,012
Total segment revenues	47,126		33,600		141,617		88,431
Less: intersegment revenues	1,339		1,279		3,977		3,784
Consolidated sales and other operating revenues(a)	$	45,787	$	32,321	$	137,640	$	84,647

(a)Includes related party sales. See Note 7 for additional information.

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	Three Months Ended  September 30,				Nine Months Ended  September 30,
(Millions of dollars)	2022		2021		2022		2021
Income (loss) from equity method investments
Refining & Marketing	$	21	$	8	$	39	$	27
Midstream	159		114		430		292
Corporate(a)	—		—		—		(13)
Consolidated income from equity method investments	$	180	$	122	$	469	$	306
Depreciation and amortization
Refining & Marketing	$	459	$	462	$	1,395	$	1,406
Midstream	322		329		983		994
Corporate	13		45		40		151
Consolidated depreciation and amortization	$	794	$	836	$	2,418	$	2,551
Capital expenditures
Refining & Marketing	$	445	$	228	$	1,004	$	538
Midstream	267		190		772		506
Segment capital expenditures and investments	712		418		1,776		1,044
Less investments in equity method investees	55		37		215		150
Plus:
Corporate	49		28		87		72
Capitalized interest	28		18		76		48
Consolidated capital expenditures(b)	$	734	$	427	$	1,724	$	1,014

(a)Impairment of equity method investment.

(b)Includes changes in capital expenditure accruals. See Note 20 for a reconciliation of total capital expenditures to additions to property, plant and equipment for the nine months ended September 30, 2022 and 2021 as reported in the consolidated statements of cash flows.

11. Net Interest and Other Financial Costs

Net interest and other financial costs were as follows:

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(Millions of dollars)	2022		2021		2022		2021
Interest income	$	(59)	$	(5)	$	(82)	$	(8)
Interest expense	332		331		966		1,019
Interest capitalized	(29)		(18)		(77)		(54)
Pension and other postretirement non-service costs(a)	(7)		10		4		66
Other financial costs	3		10		3		30
Net interest and other financial costs	$	240	$	328	$	814	$	1,053

(a)See Note 22.

12. Income Taxes

We recorded a combined federal, state and foreign income tax provision of $1.426 billion and $3.507 billion for the three and nine months ended September 30, 2022, respectively, which was higher than the tax computed at the U.S. statutory rate primarily due to state taxes offset by permanent tax benefits related to net income attributable to noncontrolling interests.

We recorded a combined federal, state and foreign income tax (benefit) provision of $(18) million and $21 million for the three and nine months ended September 30, 2021, respectively, which was lower than the tax computed at the U.S. statutory rate primarily due to certain permanent tax benefits related to net income attributable to noncontrolling interests.

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13. Inventories

(Millions of dollars)	September 30, 2022		December 31, 2021
Crude oil	$	3,565	$	2,639
Refined products	5,188		4,460
Materials and supplies	1,081		956
Total	$	9,834	$	8,055

Inventories are carried at the lower of cost or market value. Costs of crude oil and refined products are aggregated on a consolidated basis for purposes of assessing whether the LIFO cost basis of these inventories may have to be written down to market values.

The cost of inventories of crude oil and refined products is determined primarily under the LIFO method. During the three and nine month periods ended September 30, 2022, we recorded a $28 million charge to reflect a LIFO increment of our crude oil and refined products inventories. The cost of inventory in these LIFO layers was valued based on the purchase price determined in the first quarter of 2022, which is lower than current crude cost, resulting in the charge to cost of revenues.

14. Equity Method Investments

Martinez Renewables LLC

On September 21, 2022, MPC closed on the formation of the Martinez Renewable joint venture. MPC contributed property, plant and equipment, inventory, and working capital with an estimated fair value of $1.471 billion and Neste contributed $728 million in cash. MPC recorded a gain of $549 million resulting from the difference between the carrying value and fair value of the contributed property, plant and equipment and inventory. Subsequent to the closing, the joint venture paid a special distribution to MPC of $500 million, which is reflected as a return of capital in MPC’s consolidated statements of cash flows. After the special distribution, MPC’s investment value in the entity is approximately $971 million.

MPC determined that, as of the closing date, Martinez Renewables LLC is a VIE because the entity does not have sufficient equity to complete the modification of the plant to produce renewable fuels without additional financial support from its owners. We are not the primary beneficiary of this VIE because we do not have the ability to control the activities that significantly influence the economic outcomes of the entity and, therefore, apply the equity method of accounting with the respect to our investment in the entity.

Watson Cogeneration Company

On June 1, 2022, MPC purchased the remaining 49 percent interest in Watson Cogeneration Company from NRG Energy, Inc. for approximately $59 million. This entity is now consolidated and included in our consolidated results. It was previously accounted for as an equity method investment.

The excess of the $62 million fair value over the $25 million book value of our 51 percent ownership interest in Watson Cogeneration Company resulted in a $37 million non-cash gain, which is included in the net gain on disposal of assets line of the accompanying consolidated statements of income.

15. Property, Plant and Equipment

	September 30, 2022						December 31, 2021
(Millions of dollars)	Gross PP&E		Accumulated Depreciation		Net PP&E		Gross PP&E		Accumulated Depreciation		Net PP&E
Refining & Marketing	$	31,571	$	16,345	$	15,226	$	31,089	$	14,876	$	16,213
Midstream	27,464		7,868		19,596		28,098		7,384		20,714
Corporate	1,539		977		562		1,446		933		513
Total	$	60,574	$	25,190	$	35,384	$	60,633	$	23,193	$	37,440

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16. Fair Value Measurements

Fair Values—Recurring

The following tables present assets and liabilities accounted for at fair value on a recurring basis as of September 30, 2022 and December 31, 2021 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.

	September 30, 2022
	Fair Value Hierarchy
(Millions of dollars)	Level 1		Level 2		Level 3		Netting and Collateral(a)		Net Carrying Value on Balance Sheet(b)		Collateral Pledged Not Offset
Assets:
Commodity contracts	$	1,044	$	—	$	—	$	(931)	$	113	$	41
Liabilities:
Commodity contracts	$	931	$	—	$	—	$	(931)	$	—	$	—
Embedded derivatives in commodity contracts	—		—		46		—		46		—

	December 31, 2021
	Fair Value Hierarchy
(Millions of dollars)	Level 1		Level 2		Level 3		Netting and Collateral(a)		Net Carrying Value on Balance Sheet(b)		Collateral Pledged Not Offset
Assets:
Commodity contracts	$	270	$	1	$	—	$	(235)	$	36	$	34
Liabilities:
Commodity contracts	$	248	$	1	$	—	$	(249)	$	—	$	—
Embedded derivatives in commodity contracts	—		—		108		—		108		—

(a)Represents the impact of netting assets, liabilities and cash collateral when a legal right of offset exists. As of September 30, 2022, no cash collateral was netted with mark-to-market derivative liabilities. As of December 31, 2021, cash collateral of $14 million was netted with mark-to-market derivative liabilities.

(b)We have no derivative contracts that are covered by master netting arrangements reflected gross on the balance sheet.

Level 3 instruments relate to an embedded derivative liability for a natural gas purchase commitment embedded in a keep‑whole processing agreement. The fair value calculation for these Level 3 instruments at September 30, 2022 used significant unobservable inputs including: (1) NGL prices interpolated and extrapolated due to inactive markets ranging from $0.51 to $1.56 per gallon with a weighted average of $0.75 per gallon and (2) the probability of renewal of 100 percent for the five-year term of the natural gas purchase commitment and related keep-whole processing agreement. Increases or decreases in the fractionation spread result in an increase or decrease in the fair value of the embedded derivative liability.

The following is a reconciliation of the beginning and ending balances recorded for net liabilities classified as Level 3 in the fair value hierarchy.

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(Millions of dollars)	2022		2021		2022		2021
Beginning balance	$	92	$	102	$	108	$	63
Unrealized and realized (gain)/loss included in net income	(44)		7		(52)		52
Settlements of derivative instruments	(2)		(5)		(10)		(11)
Ending balance	$	46	$	104	$	46	$	104
The amount of total (gain)/loss for the period included in earnings attributable to the change in unrealized losses relating to liabilities still held at the end of period:	$	(42)	$	6	$	(50)	$	44

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Fair Values – Non-recurring

Non-recurring fair value measurements and disclosures relate primarily to sales-type leases discussed in Note 23 and the Martinez Renewables LLC equity method investment discussed in Note 14. The net investment in sales-type leases was recorded at the estimated fair value of the underlying leased assets at contract modification date. The leased assets were valued using a cost method valuation approach which utilizes Level 3 inputs. The fair value of the Martinez Renewables LLC equity method investment was primarily based on the cash consideration received from Neste for their 50 percent ownership.

Fair Values – Reported

We believe the carrying value of our other financial instruments, including cash and cash equivalents, receivables, accounts payable and certain accrued liabilities, approximate fair value. Our fair value assessment incorporates a variety of considerations, including the short-term duration of the instruments and the expected insignificance of bad debt expense, which includes an evaluation of counterparty credit risk. The borrowings under our revolving credit facilities, which include variable interest rates, approximate fair value. The fair value of our long-term debt is based on prices from recent trade activity and is categorized in level 3 of the fair value hierarchy. The carrying and fair values of our debt were approximately $26.3 billion and $23.3 billion at September 30, 2022, respectively, and approximately $25.1 billion and $28.1 billion at December 31, 2021, respectively. These carrying and fair values of our debt exclude the unamortized issuance costs which are netted against our total debt.

17. Derivatives

For further information regarding the fair value measurement of derivative instruments, including any effect of master netting agreements or collateral, see Note 16. We do not designate any of our commodity derivative instruments as hedges for accounting purposes.

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 soybean oil.

The following table presents the fair value of derivative instruments as of September 30, 2022 and December 31, 2021 and the line items in the balance sheets in which the fair values are reflected. The fair value amounts below are presented on a gross basis and do not reflect the netting of asset and liability positions permitted under the terms of our master netting arrangements including cash collateral on deposit with, or received from, brokers. We offset the recognized fair value amounts for multiple derivative instruments executed with the same counterparty in our financial statements when a legal right of offset exists. As a result, the asset and liability amounts below will not agree with the amounts presented in our consolidated balance sheets.

(Millions of dollars)	September 30, 2022				December 31, 2021
Balance Sheet Location	Asset		Liability		Asset		Liability
Commodity derivatives
Other current assets	$	1,044	$	931	$	271	$	249
Other current liabilities(a)	—		7		—		15
Deferred credits and other liabilities(a)	—		39		—		93

(a)     Includes embedded derivatives.

The table below summarizes open commodity derivative contracts for crude oil, refined products, blending products and soybean oil as of September 30, 2022.

	Percentage of contracts that expire next quarter	Position
(Units in thousands of barrels)		Long	Short
Exchange-traded(a)
Crude oil	77.6%	121,558	124,469
Refined products	87.0%	13,316	14,280
Blending products	80.9%	3,694	8,883
Soybean oil	92.8%	2,957	3,479

(a)    Included in exchange-traded are spread contracts in thousands of barrels: Crude oil - 35,170 long and 31,175 short; Refined products - 778 long and 836 short. There are no spread contracts for blending products or soybean oil.

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The following table summarizes the effect of all commodity derivative instruments in our consolidated statements of income: 

	Gain (Loss)
(Millions of dollars)	Three Months Ended  September 30,				Nine Months Ended  September 30,
Income Statement Location	2022		2021		2022		2021
Sales and other operating revenues	$	—	$	(19)	$	—	$	(34)
Cost of revenues	260		(121)		(65)		(354)
Other income	—		—		1		—
Total	$	260	$	(140)	$	(64)	$	(388)

18. Debt

Our outstanding borrowings at September 30, 2022 and December 31, 2021 consisted of the following:

(Millions of dollars)	September 30, 2022		December 31, 2021
Marathon Petroleum Corporation:
Senior notes	$	6,449	$	6,449
Notes payable	1		1
Finance lease obligations	543		589
Total	$	6,993	$	7,039
MPLX LP:
Bank revolving credit facility	—		300
Senior notes	20,100		18,600
Finance lease obligations	8		9
Total	$	20,108	$	18,909
Total debt	$	27,101	$	25,948
Unamortized debt issuance costs	(145)		(129)
Unamortized (discount) premium, net	(254)		(280)
Amounts due within one year	(1,064)		(571)
Total long-term debt due after one year	$	25,638	$	24,968

MPLX Senior Notes

On March 14, 2022, MPLX issued $1.5 billion aggregate principal amount of 4.950% senior notes due March 2052 in an underwritten public offering. The net proceeds were used to repay amounts outstanding under the MPC intercompany loan agreement and under the previous MPLX credit agreement.

On August 11, 2022, MPLX issued $1.0 billion aggregate principal amount of 4.950% senior notes due September 2032 in an underwritten public offering. The net proceeds were used to redeem all of the $500 million aggregate principal amount of 3.500% senior notes due December 2022, $14 million of which was issued by Andeavor Logistics LP, and to redeem all of the $500 million aggregate principal amount of 3.375% senior notes due March 2023.

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Available Capacity under our Credit Facilities as of September 30, 2022

(Millions of dollars)	Total Capacity		Outstanding Borrowings		Outstanding Letters of Credit		Available Capacity		Weighted Average Interest Rate		Expiration
MPC, excluding MPLX
MPC bank revolving credit facility	$	5,000	$	—	$	1	$	4,999	—	%	July 2027
MPC trade receivables securitization facility(a)	100		—		100		—		—		September 2023
MPLX
MPLX bank revolving credit facility	2,000		—		—		2,000		—	%	July 2027

(a)    The committed borrowing and letter of credit issuance capacity of the trade receivables securitization facility is $100 million. In addition, the facility allows for the issuance of letters of credit in excess of the committed capacity at the discretion of the issuing banks. As of September 30, 2022, letters of credit in the total amount of $1.153 billion were issued and outstanding under the facility to secure contracts awarded by the Department of Energy to purchase crude oil from the Strategic Petroleum Reserve. In July 2022, the trade receivables securitization facility was amended to, among other things, extend its term until September 29, 2023.

MPC Bank Revolving Credit Facility

On July 7, 2022, MPC entered into a new five-year revolving credit agreement (the “MPC Credit Agreement”) to replace its previous $5.0 billion credit facility that was scheduled to expire in October 2023. The new MPC Credit Agreement, among other things, provides for a $5.0 billion unsecured revolving credit facility that matures in July 2027 and letter of credit issuing capacity under the facility of up to $2.2 billion. Letters of credit issuing capacity is included in, not in addition to, the $5.0 billion borrowing capacity. The financial covenants of the MPC Credit Agreement are substantially the same as those contained in the previous credit agreement. Borrowings under the new MPC Credit Agreement bear interest, at MPC’s election, at either the Adjusted Term SOFR or the Alternate Base Rate, both as defined in the MPC Credit Agreement, plus an applicable margin.

MPLX Bank Revolving Credit Facility

On July 7, 2022, MPLX entered into a new five-year revolving credit agreement (the “MPLX Credit Agreement”) to replace its previous $3.5 billion credit facility that was scheduled to expire in July 2024. The new MPLX Credit Agreement, among other things, provides for a $2.0 billion unsecured revolving credit facility that matures in July 2027 and letter of credit issuing capacity under the facility of up to $150 million. Letters of credit issuing capacity is included in, not in addition to, the $2.0 billion borrowing capacity. The financial covenants of the MPLX Credit Agreement are substantially the same as those contained in the previous credit agreement. Borrowings under the new MPLX Credit Agreement bear interest, at MPLX’s election, at either the Adjusted Term SOFR or the Alternate Base Rate, both as defined in the MPLX Credit Agreement, plus an applicable margin.

19. Revenue

The following table presents our revenues from external customers disaggregated by segment and product line.

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(Millions of dollars)	2022		2021		2022		2021
Refining & Marketing:
Refined products	$	42,090	$	29,257	$	124,547	$	75,594
Crude oil	1,783		1,687		7,648		4,999
Services and other	482		165		1,252		731
Total revenues from external customers	44,355		31,109		133,447		81,324
Midstream:
Refined products	617		441		1,812		1,027
Services and other	815		771		2,381		2,296
Total revenues from external customers	1,432		1,212		4,193		3,323
Sales and other operating revenues	$	45,787	$	32,321	$	137,640	$	84,647

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We do not disclose information on the future performance obligations for any contract with expected duration of one year or less at inception. As of September 30, 2022, we do not have future performance obligations that are material to future periods.

Receivables

On the accompanying consolidated balance sheets, receivables, less allowance for doubtful accounts primarily consists of customer receivables. Significant, non-customer balances included in our receivables at September 30, 2022 include matching buy/sell receivables of $5.92 billion.

20. Supplemental Cash Flow Information

	Nine Months Ended  September 30,
(Millions of dollars)	2022		2021
Net cash provided by operating activities included:
Interest paid (net of amounts capitalized)	$	837	$	935
Net income taxes paid to (received from) taxing authorities	3,741		2,896
Non-cash investing and financing activities:
Contribution of assets(a)	818		—
Book value of equity method investment(b)	25		—

(a)    Represents the book value of property, plant and equipment, inventory and working capital contributed by MPC to Martinez Renewables LLC. See Note 14 for additional information.

(b)    Represents the book value of MPC’s equity method investment in Watson Cogeneration Company at June 1, 2022 prior to MPC buying out the remaining interest in Watson Cogeneration Company. See Note 14 for additional 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:

	Nine Months Ended  September 30,
(Millions of dollars)	2022		2021
Additions to property, plant and equipment per the consolidated statements of cash flows	$	1,694	$	983
Increase in capital accruals	30		31
Total capital expenditures	$	1,724	$	1,014

21. Accumulated Other Comprehensive Loss

The following table shows the changes in accumulated other comprehensive loss by component. Amounts in parentheses indicate debits.

(Millions of dollars)	Pension Benefits		Other Benefits		Other		Total
Balance as of December 31, 2020	$	(338)	$	(181)	$	7	$	(512)
Other comprehensive gain (loss) before reclassifications, net of tax of $38	115		1		(4)		112
Amounts reclassified from accumulated other comprehensive loss:
Amortization of prior service cost (credit)(a)	(34)		2		—		(32)
Amortization of actuarial loss(a)	35		7		—		42
Settlement loss(a)	64		—		—		64
Other	—		—		(1)		(1)
Tax effect	(15)		(2)		—		(17)
Other comprehensive income (loss)	165		8		(5)		168
Balance as of September 30, 2021	$	(173)	$	(173)	$	2	$	(344)

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(Millions of dollars)	Pension Benefits		Other Benefits		Other		Total
Balance as of December 31, 2021	$	(117)	$	49	$	1	$	(67)
Other comprehensive gain (loss) before reclassifications, net of tax of $(44)	(131)		2		(3)		(132)
Amounts reclassified from accumulated other comprehensive loss:
Amortization of prior service credit(a)	(34)		(16)		—		(50)
Amortization of actuarial loss(a)	4		4		—		8
Settlement loss(a)	69		—		—		69
Tax effect	(10)		3		—		(7)
Other comprehensive loss	(102)		(7)		(3)		(112)
Balance as of September 30, 2022	$	(219)	$	42	$	(2)	$	(179)

(a)These accumulated other comprehensive loss components are included in the computation of net periodic benefit cost. See Note 22.

22. Pension and Other Postretirement Benefits

The following summarizes the components of net periodic benefit costs:

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(Millions of dollars)	2022		2021		2022		2021
Pension Benefits
Service cost	$	48	$	73	$	181	$	221
Interest cost	25		23		72		69
Expected return on plan assets	(33)		(37)		(111)		(99)
Amortization of prior service credit	(11)		(11)		(34)		(34)
Amortization of actuarial (gain) loss	(3)		10		4		35
Settlement loss	13		15		69		64
Net periodic pension benefit cost	$	39	$	73	$	181	$	256
Other Benefits
Service cost	$	6	$	9	$	19	$	26
Interest cost	6		7		16		22
Amortization of prior service cost (credit)	(5)		1		(16)		2
Amortization of actuarial loss	1		2		4		7
Net periodic other benefit cost	$	8	$	19	$	23	$	57

The components of net periodic benefit cost other than the service cost component are included in net interest and other financial costs on the consolidated statements of income.

During the nine months ended September 30, 2022, we made contributions of $15 million to our funded pension plans. Benefit payments related to unfunded pension and other postretirement benefit plans were $12 million and $42 million, respectively, during the nine months ended September 30, 2022.

23. Leases

Lease revenues included in the consolidated statements of income were as follows:

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(In millions)	2022		2021		2022		2021
Operating leases:
Rental income	$	75	$	88	$	268	$	286

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	Three Months Ended  September 30,				Nine Months Ended  September 30,
(In millions)	2022		2021		2022		2021
Sales-type leases:
Interest income (Sales-type rental revenue-fixed minimum)	19		—		19		—
Interest income (Revenue from variable lease payments)	9		—		9		—
Sales-type lease revenue	$	28	$	—	$	28	$	—

During the third quarter of 2022, the approved expansion of a gathering and compression system triggered the first assessment of a third party agreement under ASC 842. As a result of the assessment during the period, the lease was reclassified from an operating lease to a sales-type lease. Accordingly, the underlying property, plant and equipment of $745 million and associated deferred revenue of $277 million were derecognized. The present value of the future lease payments of $914 million and the unguaranteed residual value of $63 million were recorded as the net investment in the lease within receivables and other noncurrent assets. This resulted in a gain of approximately $509 million, which was recorded as a net gain on disposal of assets in the consolidated statements of income. These transactions were non-cash transactions.

Annual minimum undiscounted lease payment receipts under our sales-type leases were as follows as of September 30, 2022:

(In millions)
2022	$	53
2023	166
2024	156
2025	146
2026	136
2027 and thereafter	1,096
Total minimum future rentals	1,753
Less: present value discount	809
Lease receivables(a)	$	944
Current lease receivables(b)	$	106
Long-term lease receivables(c)	838
Unguaranteed residual asset	63
Total sales-type lease assets	$	1,007

(a)    This amount does not include the unguaranteed residual assets.

(b)    Presented in receivables, net on the consolidated balance sheets.

(c)    Presented in other noncurrent assets on the consolidated balance sheets.

Capital expenditures related to assets subject to sales-type lease arrangements were $3 million for the nine months ended September 30, 2022. These amounts are reflected as additions to property, plant and equipment in the consolidated statements of cash flows.

24. 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 a liability, we are unable to estimate a range of possible loss because the issues involved have not been fully developed through pleadings, discovery or court proceedings. 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.

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At September 30, 2022 and December 31, 2021, accrued liabilities for remediation totaled $383 million and $401 million, respectively. 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 $6 million at both September 30, 2022 and December 31, 2021.

Governmental and other entities in various states have filed climate-related lawsuits against numerous energy companies, including MPC. The lawsuits allege damages as a result of climate change and the plaintiffs are seeking unspecified damages and abatement under various tort theories. We are currently subject to such proceedings in federal or state courts in California, Delaware, Maryland, Hawaii, Rhode Island and South Carolina. Similar lawsuits may be filed in other jurisdictions. At this early stage, the ultimate outcome of these matters remains uncertain, and neither the likelihood of an unfavorable outcome nor the ultimate liability, if any, can be determined.

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.

Other Legal Proceedings

In July 2020, Tesoro High Plains Pipeline Company, LLC (“THPP”), a subsidiary of MPLX, received a Notification of Trespass Determination from the Bureau of Indian Affairs (“BIA”) relating to a portion of the Tesoro High Plains Pipeline that crosses the Fort Berthold Reservation in North Dakota. The notification demanded the immediate cessation of pipeline operations and assessed trespass damages of approximately $187 million. On appeal, the Assistant Secretary - Indian Affairs vacated the BIA’s trespass order and remanded to the Regional Director for the BIA Great Plains Region to issue a new decision based on specified criteria. On December 15, 2020, the Regional Director of the BIA issued a new trespass notice to THPP, finding that THPP was in trespass and assessing trespass damages of approximately $4 million (including interest), which has been paid. The order also required that THPP immediately cease and desist use of the portion of the pipeline that crosses the property at issue. THPP has complied with the Regional Director’s December 15, 2020 notice. In March 2021, THPP received a copy of an order purporting to vacate all orders related to THPP’s alleged trespass issued by the BIA between July 2, 2020 and January 14, 2021. The order directs the Regional Director of the BIA to reconsider the issue of THPP’s alleged trespass and issue a new order, if necessary, after all interested parties have had an opportunity to be heard. On April 23, 2021, THPP filed a lawsuit in the District of North Dakota against the United States of America, the U.S. Department of the Interior and the BIA (together, the “U.S. Government Parties”) challenging the March order purporting to vacate all previous orders related to THPP’s alleged trespass. On February 8, 2022, the U.S. Government Parties filed their answer to THPP’s suit, asserting counterclaims for trespass and ejectment. The U.S. Government parties claim THPP is in continued trespass with respect to the pipeline and seek disgorgement of pipeline profits from June 1, 2013 to present, removal of the pipeline and remediation. We intend to vigorously defend ourselves against these counterclaims. Negotiations with the holders of the property rights at issue to settle this matter have been unsuccessful.

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, individually or collectively, 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

LOOP and LOCAP

MPC and MPLX hold interests in an offshore oil port, LOOP, and MPLX holds an interest in a crude oil pipeline system, LOCAP. Both LOOP and LOCAP have secured various project financings with throughput and deficiency agreements. Under the agreements, MPC, as a shipper, is 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 varies but tends 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 $171 million as of September 30, 2022.

Dakota Access Pipeline

MPLX holds a 9.19 percent indirect interest in a joint venture (“Dakota Access”) that owns and operates the Dakota Access Pipeline and Energy Transfer Crude Oil Pipeline projects, collectively referred to as the Bakken Pipeline system or DAPL. In 2020, the U.S. District Court for the District of Columbia (the “D.D.C.”) ordered the U.S. Army Corps of Engineers (“Army Corps”),

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which granted permits and an easement for the Bakken Pipeline system, to prepare an environmental impact statement (“EIS”) relating to an easement under Lake Oahe in North Dakota. The D.D.C. later vacated the easement. The EIS has been delayed and the Army Corps currently expects to release a draft EIS in the first half of 2023.

In May 2021, the D.D.C. denied a renewed request for an injunction to shut down the pipeline while the EIS is being prepared. In June 2021, the D.D.C. issued an order dismissing without prejudice the tribes’ claims against the Dakota Access Pipeline. The litigation could be reopened or new litigation challenging the EIS, once completed, could be filed. The pipeline remains operational.

MPLX has entered into a Contingent Equity Contribution Agreement whereby it, along with the other joint venture owners in the Bakken Pipeline system, has agreed to make equity contributions to the joint venture upon certain events occurring to allow the entities that own and operate the Bakken Pipeline system to satisfy their senior note payment obligations. The senior notes were issued to repay amounts owed by the pipeline companies to fund the cost of construction of the Bakken Pipeline system. If the pipeline were temporarily shut down, MPLX would have to contribute its 9.19 percent pro rata share of funds required to pay interest accruing on the notes and any portion of the principal that matures while the pipeline is shutdown. MPLX also expects to contribute its 9.19 percent pro rata share of any costs to remediate any deficiencies to reinstate the permit and/or return the pipeline into operation. If the vacatur of the easement permit results in a permanent shutdown of the pipeline, MPLX would have to contribute its 9.19 percent pro rata share of the cost to redeem the bonds (including the 1% redemption premium required pursuant to the indenture governing the notes) and any accrued and unpaid interest. As of September 30, 2022, our maximum potential undiscounted payments under the Contingent Equity Contribution Agreement were approximately $170 million.

Crowley Ocean Partners LLC and Crowley Blue Water Partners LLC

In connection with our 50 percent indirect interest in Crowley Ocean Partners LLC, we have agreed to conditionally guarantee our portion of the obligations of the joint venture and its subsidiaries under a senior secured term loan used 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. During the first quarter of 2022, the guarantee for the debt associated with one of the four vessels became effective upon the expiration of the charter for the relevant vessel. As of September 30, 2022, our maximum potential undiscounted payments under this agreement for debt principal totaled $98 million.

In connection with our 50 percent indirect interest in Crowley Blue Water Partners LLC, 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. As of September 30, 2022, our maximum potential undiscounted payments under this arrangement was $101 million.

Other guarantees

We have entered into other guarantees with maximum potential undiscounted payments totaling $97 million as of September 30, 2022, which primarily consist of a commitment to contribute cash to an equity method investee for certain catastrophic events, in lieu of procuring insurance coverage, a commitment to fund a share of the bonds issued by a government entity for construction of public utilities in the event that other industrial users of the facility default on their utility payments and leases of assets containing general lease indemnities and guaranteed residual values.

Contractual Commitments and Contingencies

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 with us if there are significant delays that are not due to force majeure.

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

This section should also be read in conjunction with the unaudited consolidated financial statements and accompanying footnotes included under Item 1. Financial Statements and in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2021.

DISCLOSURES REGARDING FORWARD-LOOKING STATEMENTS

This Quarterly Report on Form 10-Q, particularly Management’s Discussion and Analysis of Financial Condition and Results of Operations and Quantitative and Qualitative Disclosures about Market Risk, includes forward-looking statements that are subject to risks, contingencies or uncertainties. You can identify forward-looking statements by words such as “anticipate,” “believe,” “commitment,” “could,” “design,” “estimate,” “expect,” “forecast,” “goal,” “guidance,” “intend,” “may,” “objective,” “opportunity,” “outlook,” “plan,” “policy,” “position,” “potential,” “predict,” “priority,” “project,” “prospective,” “pursue,” “seek,” “should,” “strategy,” “target,” “will,” “would” or other similar expressions that convey the uncertainty of future events or outcomes.

Forward-looking statements include, among other things, statements regarding:

•future financial and operating results;

•environmental, social and governance (“ESG”) plans and goals, including those related to greenhouse gas emissions, diversity and inclusion and ESG reporting;

•future levels of capital, environmental or maintenance expenditures, general and administrative and other expenses;

•the success or timing of completion of ongoing or anticipated capital or maintenance projects;

•business strategies, growth opportunities and expected investments;

•consumer demand for refined products, natural gas and NGLs;

•the timing, amount and form of any future capital return transactions at MPC or MPLX; and

•the anticipated effects of actions of third parties such as competitors, activist investors, federal, foreign, state or local regulatory authorities, or plaintiffs in litigation.

Our forward-looking statements are not guarantees of future performance, and you should not rely unduly on them, as they involve risks, uncertainties and assumptions. Forward-looking and other statements regarding our ESG plans and goals are not an indication that these statements are material to investors or required to be disclosed in our filings with the SEC. In addition, historical, current, and forward-looking ESG-related statements may be based on standards for measuring progress that are still developing, internal controls and processes that continue to evolve, and assumptions that are subject to change in the future. Material differences between actual results and any future performance suggested in our forward-looking statements could result from a variety of factors, including the following:

•the continuance or escalation of the military conflict between Russia and Ukraine, and related sanctions and market disruptions;

•general economic, political or regulatory developments, including inflation, interest rates, changes in governmental policies relating to refined petroleum products, crude oil, natural gas or NGLs, or taxation;

•the magnitude, duration and extent of future resurgences of the COVID-19 pandemic and its effects, including travel restrictions, business and school closures, increased remote work, stay-at-home orders and other actions taken by individuals, governments and the private sector to stem the spread of the virus;

•changes in estimates or projections used to assess fair value of intangible assets, goodwill and property and equipment and/or strategic decisions or other developments with respect to our asset portfolio that cause impairment charges;

•the regional, national and worldwide availability and pricing of refined products, crude oil, natural gas, NGLs and other feedstocks;

•disruptions in credit markets or changes to credit ratings;

•the adequacy of capital resources and liquidity, including availability, timing and amounts of free cash flow necessary to execute business plans and to effect any share repurchases or to maintain or increase the dividend;

•the potential effects of judicial or other proceedings on the business, financial condition, results of operations and cash flows;

•continued or further volatility in and degradation of general economic, market, industry or business conditions as a result of the COVID-19 pandemic, other infectious disease outbreaks, natural hazards, extreme weather events, the military conflict between Russia and Ukraine, other conflicts, inflation, rising interest rates or otherwise;

•compliance with federal and state environmental, economic, health and safety, energy and other policies and regulations and enforcement actions initiated thereunder;

•adverse market conditions or other risks affecting MPLX;

•refining industry overcapacity or under capacity;

•changes in producer customers’ drilling plans or in volumes of throughput of crude oil, natural gas, NGLs, refined products or other hydrocarbon-based products;

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•non-payment or non-performance by our customers;

•changes in the cost or availability of third-party vessels, pipelines, railcars and other means of transportation for crude oil, natural gas, NGLs, feedstocks and refined products;

•the price, availability and acceptance of alternative fuels and alternative-fuel vehicles and laws mandating such fuels or vehicles;

•political and economic conditions in nations that consume refined products, natural gas and NGLs, including the United States and Mexico, and in crude oil producing regions, including the Middle East, Russia, Africa, Canada and South America;

•actions taken by our competitors, including pricing adjustments, the expansion and retirement of refining capacity and the expansion and retirement of pipeline capacity, processing, fractionation and treating facilities in response to market conditions;

•completion of pipeline projects within the United States;

•changes in fuel and utility costs for our facilities;

•accidents or other unscheduled shutdowns affecting our refineries, machinery, pipelines, processing, fractionation and treating facilities or equipment, means of transportation, or those of our suppliers or customers;

•acts of war, terrorism or civil unrest that could impair our ability to produce refined products, receive feedstocks or to gather, process, fractionate or transport crude oil, natural gas, NGLs or refined products;

•political pressure and influence of environmental groups and other stakeholders upon policies and decisions related to the production, gathering, refining, processing, fractionation, transportation and marketing of crude oil or other feedstocks, refined products, natural gas, NGLs or other hydrocarbon-based products;

•labor and material shortages;

•the costs, disruption and diversion of management’s attention associated with campaigns commenced by activist investors; and

•personnel changes.

For additional risk factors affecting our business, see the risk factors described in our Annual Report on Form 10-K for the year ended December 31, 2021. We undertake no obligation to update any forward-looking statements except to the extent required by applicable law.

EXECUTIVE SUMMARY

Business Update

Through the first nine months of 2022, our results were favorably impacted by the continuing recovery in the environment in which our business operates. The increase in global demand for refined products and global commodity supply constraints have contributed to increases in the market prices of petroleum-based transportation fuels and in Refining & Marketing margins and Midstream throughputs. Supply has remained constrained for a variety of reasons, including, but not limited to, effects from refinery closures and disruptions in the crude oil and petroleum-based products markets resulting from the Russia-Ukraine conflict. We are unable to predict the potential effects that resurgences of COVID-19 or the continuance or escalation of the military conflict between Russia and Ukraine, and related sanctions or market disruptions, may have on our financial position and results. It remains uncertain how long these conditions may last or how severe they may become.

In 2022, data indicates a sharp rise in inflation in the U.S. and globally. Current and future inflationary effects may be driven by, among other things, supply chain disruptions, governmental stimulus or fiscal policies and increasing demand for certain goods and services as recovery from the COVID-19 pandemic continues. We have observed higher costs for feedstocks, labor and materials used in our business. We cannot predict the effect of rising interest rates, the concerns of a recession and higher inflation and fuel prices on demand for our products and services.

In response to this business environment, we continue to focus on the following priorities for our businesses:

Strengthen Competitive Position of Assets

We are committed to positioning our assets so that we are a leader in operational, financial, and sustainability performance and are evaluating the strength and fit of assets in our portfolio. Our goal is that each individual asset generates free-cash-flow back to the business and contributes to shareholder returns. With our investments we are focused on high returning projects that we believe will enhance the competitiveness of our portfolio, including our investments in sustainable fuels and technologies that lower our carbon intensity as the global energy mix evolves.

Improve Commercial Performance

We are focused on leveraging advantaged raw material selection, new approaches in the commercial space to be more dynamic amidst changing market conditions, and achieving technology improvements to advance our commercial performance. A near-term focus has been securing advantaged renewable feedstocks as we continue to advance our renewable fuels production capabilities. This includes exploring joint venture opportunities and strategic alliances within the renewable fuels value chain.

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Continued Capital Discipline and Focus on Low-Cost Culture

We are committed to achieving operational excellence by reducing costs, improving efficiency, driving operational improvements and being disciplined in capital allocation. This means lowering our costs in all aspects of our business and challenging ourselves to be disciplined in every dollar we spend across our organization. We look to optimize our portfolio of investment opportunities to ensure efficient deployment of capital focusing on projects with the highest returns.

Commitment to Sustainability

Our approach to sustainability spans the environmental, social and governance dimensions of our business. That means strengthening resiliency by lowering the carbon intensity and conserving natural resources; innovating for the future by investing in renewables and emerging technologies; and embedding sustainability in decision-making and in how we engage our people and many stakeholders. Specifically, we established a 2030 target to reduce our absolute Scope 3 - Category 11 GHG emissions by 15% below 2019 levels. Additionally, MPLX established a new 2030 target to reduce methane emissions intensity by 75% below 2016 levels. The reduction target applies to MPLX’s natural gas gathering and processing operations and represents an expansion of the existing 2025 target, established in 2020, to reduce methane emissions intensity by 50% below 2016 levels.

Strategic Updates

Martinez Renewable Fuels Project Joint Venture

On September 21, 2022, MPC closed on the formation of the Martinez Renewable joint venture. The partnership is structured as a 50/50 joint venture with Neste expected to contribute a total of $1 billion. These contributions will continue into 2023. At the closing date, MPC contributed property, plant and equipment, inventory, and working capital valued at $1.471 billion and Neste contributed $728 million in cash. MPC recorded a gain of $549 million resulting from the difference between the carrying value and fair value of the contributed property, plant and equipment and inventory. Subsequent to the closing, the joint venture paid a special distribution to MPC of $500 million, which is reflected as a return of capital in MPC’s consolidated statements of cash flows. After the special distribution, MPC’s investment value in the entity is approximately $971 million.

MPC will continue to manage project execution and operate the facility once construction is complete. The annual feedstock supply requirements are split between the joint venture partners, which include specific commitments to supply advantaged feedstocks. The annual production output will be shared evenly between the joint venture partners, and each partner will have the ability to market its share of the products. The joint venture, being optimally located to strengthen both partners' footprint in renewable fuels, will utilize existing processing infrastructure and diverse inbound and outbound logistics.

This strategic partnership is expected to advance the current project objectives of delivering low carbon intensity fuels to support California's climate goals. MPC and Neste will leverage their complementary core competencies in the joint venture. MPC brings experience in renewable diesel facility conversion, large capital project execution, and operating expertise in the California market. Neste brings knowledge in sustainable feedstock sourcing and in renewable liquid fuels production. The joint venture reflects both partners' commitment to obtain low carbon intensity feedstocks to achieve the project objectives of providing fuels that meet the demand driven by the Low Carbon Fuel Standard.

The first phase of the Martinez renewables project facility is expected to be mechanically complete by year-end 2022. Initial production capacity is expected to be 260 million gallons per day of renewable fuels. Pretreatment capabilities are expected to come online in the second half of 2023 and the facility is expected to be capable of producing 730 million gallons per year by the end of 2023.

Share Repurchase Authorization

On August 2, 2022, we announced our board of directors approved an incremental $5.0 billion share repurchase authorization. The pace of future repurchases under this incremental authorization will depend on the macro environment, cash available after opportunities for capital investment and growth of the business, and market conditions. This authorization is in addition to the incremental $5.0 billion share repurchase authorization announced on February 2, 2022. The authorizations have no expiration date. As of September 30, 2022, MPC had $5.11 billion remaining under its share repurchase authorizations.

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Results

During the first quarter of 2022, our CODM began to evaluate the performance of our segments using segment adjusted EBITDA. We have modified our presentation of segment performance to be consistent with this change, including prior periods presented for consistent and comparable presentation. Amounts included in net income and excluded from segment adjusted EBITDA include: (i) depreciation and amortization; (ii) provision for income taxes; (iii) net interest and other financial costs; (iv) noncontrolling interests; (v) turnaround expenses and (vi) other adjustments as deemed necessary. These items are either: (i) believed to be non-recurring in nature; (ii) not believed to be allocable or controlled by the segment; or (iii) are not tied to the operational performance of the segment.

Select results for continuing operations are reflected in the following table.

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(Millions of dollars)	2022		2021		2022		2021
Segment adjusted EBITDA for reportable segments
Refining & Marketing	$	5,496	$	1,195	$	14,630	$	1,969
Midstream	1,498		1,375		4,357		4,005
Total reportable segments	$	6,994	$	2,570	$	18,987	$	5,974
Reconciliation of segment adjusted EBITDA for reportable segments to income from continuing operations before income taxes
Total reportable segments	$	6,994	$	2,570	$	18,987	$	5,974
Corporate	(160)		(154)		(454)		(428)
Refining planned turnaround costs	(384)		(205)		(680)		(378)
Storm impacts	—		(23)		—		(70)
LIFO inventory charge	(28)		—		(28)		—
Gain on sale of assets(a)	1,058		—		1,058		—
Renewable volume obligation requirements	—		—		238		—
Litigation	—		—		27		—
Impairments(b)	—		—		—		(13)
Idling expenses	—		(12)		—		(12)
Depreciation and amortization(c)	(794)		(836)		(2,418)		(2,551)
Net interest and other financial costs	(240)		(328)		(814)		(1,053)
Income from continuing operations before income taxes	$	6,446	$	1,012	$	15,916	$	1,469

(a)    Includes the non-cash gain related to the contribution of assets by MPC on the formation of the Martinez Renewable joint venture and the non-cash gain on lease reclassification. See Note 14 and 23 to the unaudited consolidated financial statements for additional information.

(b)    Impairment of equity method investments.

(c)    The three and nine months ended September 30, 2021 includes $13 million and $56 million, respectively, of impairments of long lived assets.

The following table includes net income per diluted share data.

	Three Months Ended  September 30,				Nine Months Ended  September 30,
	2022		2021		2022		2021
Net income per diluted share
Continuing operations	$	9.06	$	1.09	$	21.04	$	0.79
Discontinued operations	—		—		—		13.02
Net income attributable to MPC	$	9.06	$	1.09	$	21.04	$	13.81

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Net income attributable to MPC was $4.48 billion, or $9.06 per diluted share, in the third quarter of 2022 compared to $694 million, or $1.09 per diluted share, for the third quarter of 2021 and $11.20 billion, or $21.04 per diluted share, in the first nine months of 2022 compared to $8.96 billion, or $13.81 per diluted share, in the first nine months of 2021.

For the third quarter of 2022 and first nine months of 2022, the increases in net income attributable to MPC were largely due increased average refined product sales prices and volumes and non-cash net gains on disposal of assets, partially offset by increased operating costs. The increase in the first nine months of 2022 was also offset by income from discontinued operations in 2021, due to the sale of the Speedway business on May 14, 2021.

See Note 4 to the unaudited consolidated financial statements for additional information on discontinued operations.

Refer to the Results of Operations section for a discussion of consolidated financial results and segment results for the third quarter of 2022 as compared to the third quarter of 2021 and the first nine months of 2022 compared to the first nine months of 2021.

MPLX

We owned approximately 647 million MPLX common units as of September 30, 2022, with a market value of $19.43 billion based on the September 30, 2022 closing price of $30.01 per common unit. On November 1, 2022, MPLX declared a quarterly cash distribution of $0.7750 per common unit payable on November 22, 2022 to unitholders of record on November 15, 2022. As a result, MPC’s portion of this distribution is approximately $502 million.

We received limited partner distributions of $1.37 billion from MPLX in the nine months ended September 30, 2022 and $1.34 billion in the nine months ended September 30, 2021.

During the nine months ended September 30, 2022, MPLX repurchased approximately 10 million MPLX common units at an average cost per unit of $31.98 and paid $315 million of cash. As of September 30, 2022, approximately $1.0 billion remained available under the authorization for future unit repurchases, which reflects the repurchase of 532,326 common units for $16 million that were transacted in the third quarter of 2022 and settled in the fourth quarter of 2022.

See Note 5 to the unaudited consolidated financial statements for additional information on MPLX.

OVERVIEW OF SEGMENTS

Refining & Marketing

Refining & Marketing segment adjusted EBITDA depends largely on our refinery throughputs, Refining & Marketing margin, refining operating costs and distribution costs.

Refining & Marketing margin is the difference between the prices of refined products sold and the costs of crude oil and other charge and blendstocks refined, including the costs to transport these inputs to our refineries and the costs of products purchased for resale. The crack spread is a measure of the difference between market prices for refined products and crude oil, commonly used by the industry as a proxy for the refining margin. Crack spreads can fluctuate significantly, particularly when prices of refined products do not move in the same direction as the cost of crude oil. As a performance benchmark and a comparison with other industry participants, we calculate Gulf Coast, Mid-Continent and West Coast crack spreads that we believe most closely track our operations and slate of products. The following are used for these crack spread calculations:

•The Gulf Coast crack spread uses three barrels of MEH crude producing two barrels of USGC CBOB gasoline and one barrel of USGC ULSD;

•The Mid-Continent crack spread uses three barrels of WTI crude producing two barrels of Chicago CBOB gasoline and one barrel of Chicago ULSD; and

•The West Coast crack spread uses three barrels of ANS crude producing two barrels of LA CARBOB and one barrel of LA CARB Diesel.

Our refineries can process significant amounts of sweet and sour crude oil, which typically can be purchased at a discount to crude oil referenced in our Gulf Coast, Mid-Continent and West Coast crack spreads. The amount of these discounts, which we refer to as the sweet differential and sour differential, can vary significantly, causing our Refining & Marketing margin to differ from blended crack spreads. In general, larger sweet and sour differentials will enhance our Refining & Marketing margin.

Future crude oil differentials will be dependent on a variety of market and economic factors, as well as U.S. energy policy.

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The following table provides sensitivities showing an estimated change in annual net income due to potential changes in market conditions. 

(Millions of dollars, after-tax)
Blended crack spread sensitivity(a) (per $1.00/barrel change)	$	800
Sour differential sensitivity(b) (per $1.00/barrel change)	375
Sweet differential sensitivity(c) (per $1.00/barrel change)	375
Natural gas price sensitivity(d) (per $1.00/MMBtu)	250

(a)Crack spread based on 40 percent MEH, 40 percent WTI and 20 percent ANS with Gulf Coast, Mid-Continent and West Coast product pricing, respectively, and assumes all other differentials and pricing relationships remain unchanged.

(b)Sour crude oil basket consists of the following crudes: ANS, Argus Sour Crude Index, Maya and Western Canadian Select. We assume approximately 50 percent of the crude processed at our refineries in 2022 will be sour crude.

(c)Sweet crude oil basket consists of the following crudes: Bakken, Brent, MEH, WTI-Cushing and WTI-Midland. We assume approximately 50 percent of the crude processed at our refineries in 2022 will be sweet crude.

(d)This is consumption-based exposure for our Refining & Marketing segment and does not include the sales exposure for our Midstream segment.

In addition to the market changes indicated by the crack spreads, the sour differential and the sweet differential, our Refining & Marketing margin is impacted by factors such as:

•the selling prices realized for refined products;

•the types of crude oil and other charge and blendstocks processed;

•our refinery yields;

•the cost of products purchased for resale;

•the impact of commodity derivative instruments used to hedge price risk;

•the potential impact of LCM adjustments to inventories in periods of declining prices;

•the potential impact of LIFO charges due to changes in historic inventory levels; and

•the cost of purchasing RINs in the open market to comply with RFS2 requirements.

Refining & Marketing segment adjusted EBITDA is also affected by changes in refinery operating costs in addition to committed distribution costs. Changes in operating costs are primarily driven by the cost of energy used by our refineries, including purchased natural gas, and the level of maintenance costs. Distribution costs primarily include long-term agreements with MPLX, which as discussed below include minimum commitments to MPLX, and will negatively impact income from operations in periods when throughput or sales are lower or refineries are idled.

We have various long-term, fee-based commercial agreements with MPLX. Under these agreements, MPLX, which is reported in our Midstream segment, provides transportation, storage, distribution and marketing services to our Refining & Marketing segment. Certain of these agreements include commitments for minimum quarterly throughput and distribution volumes of crude oil and refined products and minimum storage volumes of crude oil, refined products and other products. Certain other agreements include commitments to pay for 100 percent of available capacity for certain marine transportation and refining logistics assets.

Midstream

Our Midstream segment transports, stores, distributes and markets crude oil and refined products, principally for our Refining & Marketing segment. The profitability of our pipeline transportation operations primarily depends on tariff rates and the volumes shipped through the pipelines. The profitability of our marine operations primarily depends on the quantity and availability of our vessels and barges. The profitability of our light product terminal operations primarily depends on the throughput volumes at these terminals. The profitability of our fuels distribution services primarily depends on the sales volumes of certain refined products. The profitability of our refining logistics operations depends on the quantity and availability of our refining logistics assets. A majority of the crude oil and refined product shipments on our pipelines and marine vessels and the refined product throughput at our terminals serve our Refining & Marketing segment and our refining logistics assets and fuels distribution services are used solely by our Refining & Marketing segment. As discussed above in the Refining & Marketing section, MPLX, which is reported in our Midstream segment, has various long-term, fee-based commercial agreements related to services provided to our Refining & Marketing segment. Under these agreements, MPLX has received various commitments of minimum throughput, storage and distribution volumes as well as commitments to pay for all available capacity of certain assets. The volume of crude oil that we transport is directly affected by the supply of, and refiner demand for, crude oil in the markets served directly by our crude oil pipelines, terminals and marine operations. Key factors in this supply and demand balance are the production levels of crude oil by producers in various regions or fields, the availability and cost of alternative modes of transportation, the volumes of crude oil processed at refineries and refinery and transportation system maintenance levels. The volume of refined products that we transport, store, distribute and market is directly affected by the production levels of, and user demand for, refined products in the markets served by our refined product pipelines and marine operations. In most of our markets, demand for gasoline and distillate peaks during the summer driving season, which extends from May through

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September of each year, and declines during the fall and winter months. As with crude oil, other transportation alternatives and system maintenance levels influence refined product movements.

Our Midstream segment also gathers and processes natural gas and NGLs. NGL and natural gas prices are volatile and are impacted by changes in fundamental supply and demand, as well as market uncertainty, availability of NGL transportation and fractionation capacity and a variety of additional factors that are beyond our control. Our Midstream segment profitability is affected by prevailing commodity prices primarily as a result of processing or conditioning at our own or third‑party processing plants, purchasing and selling or gathering and transporting volumes of natural gas at index‑related prices and the cost of third‑party transportation and fractionation services. To the extent that commodity prices influence the level of natural gas drilling by our producer customers, such prices also affect profitability.

RESULTS OF OPERATIONS

The following discussion includes comments and analysis relating to our results of operations. This discussion should be read in conjunction with Item 1. Financial Statements and is intended to provide investors with a reasonable basis for assessing our historical operations, but should not serve as the only criteria for predicting our future performance.

Consolidated Results of Operations

	Three Months Ended  September 30,						Nine Months Ended  September 30,
(Millions of dollars)	2022		2021		Variance		2022		2021		Variance
Revenues and other income:
Sales and other operating revenues(a)	$	45,787	$	32,321	$	13,466	$	137,640	$	84,647	$	52,993
Income from equity method investments	180		122		58		469		306		163
Net gain on disposal of assets	1,051		—		1,051		1,072		3		1,069
Other income	219		170		49		678		366		312
Total revenues and other income	47,237		32,613		14,624		139,859		85,322		54,537
Costs and expenses:
Cost of revenues (excludes items below)	38,821		29,563		9,258		118,096		77,824		40,272
Depreciation and amortization	794		836		(42)		2,418		2,551		(133)
Selling, general and administrative expenses	712		681		31		2,009		1,881		128
Other taxes	224		193		31		606		544		62
Total costs and expenses	40,551		31,273		9,278		123,129		82,800		40,329
Income from continuing operations	6,686		1,340		5,346		16,730		2,522		14,208
Net interest and other financial costs	240		328		(88)		814		1,053		(239)
Income from continuing operations before income taxes	6,446		1,012		5,434		15,916		1,469		14,447
Provision (benefit) for income taxes on continuing operations	1,426		(18)		1,444		3,507		21		3,486
Income from continuing operations, net of tax	5,020		1,030		3,990		12,409		1,448		10,961
Income from discontinued operations, net of tax	—		—		—		—		8,448		(8,448)
Net income	5,020		1,030		3,990		12,409		9,896		2,513
Less net income attributable to:
Redeemable noncontrolling interest	23		38		(15)		65		79		(14)
Noncontrolling interests	520		298		222		1,149		853		296
Net income attributable to MPC	$	4,477	$	694	$	3,783	$	11,195	$	8,964	$	2,231

(a)In accordance with discontinued operations accounting, Speedway sales to retail customers and net results are reflected in Income from discontinued operations, net of tax and Refining & Marketing intercompany sales to Speedway are presented as third-party sales through the close of the sale on May 14, 2021.

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Third Quarter 2022 Compared to Third Quarter 2021

Net income attributable to MPC increased $3.78 billion in the third quarter of 2022 compared to the third quarter of 2021 primarily due to increases in refined product sales prices and volumes, partially offset by increased operating costs in the third quarter of 2022.

Revenues and other income increased $14.62 billion primarily due to:

•increased sales and other operating revenues of $13.47 billion primarily due to increased Refining & Marketing segment average refined product sales prices of $0.90 per gallon and increased refined product sales volumes of 48 mbpd;

•increased income from equity method investments of $58 million mainly due to increased income from midstream equity affiliates;

•increased net gain on disposal of assets of $1.05 billion which includes the non-cash gain of $549 million on the formation of the Martinez Renewables joint venture and the non-cash gain of $509 million on a lease reclassification; and

•increased other income of $49 million primarily due to higher income on RIN sales.

Costs and expenses increased $9.28 billion primarily due to increased cost of revenues of $9.26 billion mainly due to higher crude oil costs and finished product purchases.

Net interest and other financial costs decreased $88 million largely due to increased interest income, decreased pension and other postretirement non-service costs and decreased interest expense due to lower MPC borrowings, partially offset by increased interest expense due to higher MPLX borrowings.

We recorded a combined federal, state and foreign income tax provision of $1.43 billion for the three months ended September 30, 2022, which was higher than the tax computed at the U.S. statutory rate primarily due to state taxes offset by permanent tax benefits related to net income attributable to noncontrolling interests. We recorded a combined federal, state and foreign income tax benefit of $18 million for the three months ended September 30, 2021, which was lower than the tax computed at the U.S. statutory rate primarily due to certain permanent tax benefits related to net income attributable to noncontrolling interests, state taxes, and an increase in benefit related to NOL carryback provided under the CARES Act.

Net income attributable to noncontrolling interests increased $222 million primarily due to an increase in MPLX’s net income in the third quarter of 2022.

Nine Months Ended September 30, 2022 Compared to Nine Months Ended September 30, 2021

Net income attributable to MPC increased $2.23 billion in the first nine months of 2022 compared to the first nine months of 2021 primarily due to increases in average refined product sales prices and volumes in the first nine months of 2022, partially offset by a decrease in income from discontinued operations due to the sale of the Speedway business on May 14, 2021, and increased operating costs.

Revenues and other income increased $54.54 billion primarily due to:

•increased sales and other operating revenues of $52.99 billion primarily due to increased average refined product sales prices of $1.15 per gallon and increased refined product sales volumes of 134 mbpd;

•increased income from equity method investments of $163 million mainly due to increased income from midstream equity affiliates;

•increased net gain on disposal of assets of $1.07 billion which includes the non-cash gain of $549 million on the formation of the Martinez Renewables joint venture and the non-cash gain of $509 million on a lease reclassification; and

•increased other income of $312 million primarily due to higher income on RIN sales.

Costs and expenses increased $40.33 billion primarily due to:

•increased cost of revenues of $40.27 billion primarily due to higher crude oil costs and finished product purchases;

•decreased depreciation and amortization of $133 million mainly due to asset impairments and assets that completed their depreciation life cycle in 2021; and

•increased selling, general and administrative expenses of $128 million primarily due to increased expenses for credit card processing fees, salaries and employee related expenses, contract services and insurance, partially offset by a decrease in employee benefit costs in the first nine months of 2022.

Net interest and other financial costs decreased $239 million largely due to increased interest income and decreased interest expense, due to lower MPC borrowings, and decreased pension and other postretirement non-service costs, partially offset by increased interest expense due to higher MPLX borrowings.

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We recorded a combined federal, state and foreign income tax expense of $3.51 billion for the nine months ended September 30, 2022, which was higher than the tax computed at the U.S. statutory rate primarily due to state taxes offset by permanent tax benefits related to net income attributable to noncontrolling interests. We recorded a combined federal, state and foreign income tax expense of $21 million for the nine months ended September 30, 2021, which was lower than the tax computed at the U.S. statutory rate primarily due to certain permanent tax benefits related to net income attributable to noncontrolling interests and a change in benefit related to the NOL carryback provided under the CARES Act offset by state taxes.

Net income attributable to noncontrolling interests increased $296 million primarily due to an increase in MPLX’s net income in the first nine months of 2022.

Segment Results

We classify our business in the following reportable segments: Refining & Marketing and Midstream. Segment adjusted EBITDA represents adjusted EBITDA attributable to the reportable segments. Amounts included in net income and excluded from segment adjusted EBITDA include: (i) depreciation and amortization; (ii) provision for income taxes; (iii) net interest and other financial costs; (iv) noncontrolling interests; (v) turnaround expenses and (vi) other adjustments as deemed necessary. These items are either: (i) believed to be non-recurring in nature; (ii) not believed to be allocable or controlled by the segment; or (iii) are not tied to the operational performance of the segment.

Our segment adjusted EBITDA for reportable segments was approximately $18.99 billion and $5.97 billion for the nine months ended September 30, 2022 and 2021, respectively. The following shows the percentage of segment adjusted EBITDA by segment for these periods.

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Refining & Marketing

The following includes key financial and operating data for the third quarter of 2022 compared to the third quarter of 2021 and the nine months ended September 30, 2022 compared to the nine months ended September 30, 2021.

(a)Includes intersegment sales to Midstream and sales destined for export.

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	Three Months Ended  September 30,				Nine Months Ended  September 30,
	2022		2021		2022		2021
Refining & Marketing Operating Statistics
Net refinery throughput (mbpd)	3,007		2,836		2,970		2,753
Refining & Marketing margin per barrel, excluding LIFO inventory charge(a)(b)	$	30.31	$	14.51	$	28.08	$	12.46
LIFO inventory charge	(0.10)		—		(0.03)		—
Refining & Marketing margin per barrel(a)(b)	$	30.21	14.51		28.05		12.46
Less:
Refining operating costs per barrel, excluding storm impacts(c)	5.63		4.97		5.35		4.89
Distribution costs per barrel	4.90		5.02		4.82		5.08
LIFO inventory charge	(0.10)		—		(0.03)		—
Other income per barrel(d)	(0.09)		(0.05)		(0.13)		(0.13)
Refining & Marketing adjusted EBITDA per barrel	$	19.87	$	4.57	$	18.04	$	2.62
Less:
Storm impacts on refining operating cost per barrel(e)	—		0.07		—		0.07
Refining planned turnaround costs per barrel	1.39		0.78		0.84		0.50
LIFO inventory charge	0.10		—		0.03		—
Depreciation and amortization per barrel	1.66		1.77		1.72		1.87
Refining & Marketing segment income per barrel	$	16.72	$	1.95	$	15.45	$	0.18
Fees paid to MPLX per barrel included in distribution costs above	$	3.34	$	3.23	$	3.36	$	3.40

(a)Sales revenue less cost of refinery inputs and purchased products, divided by net refinery throughput.

(b)See “Non-GAAP Measures” section for reconciliation and further information regarding this non-GAAP measure.

(c)Includes refining operating costs and major maintenance costs. Excludes planned turnaround and depreciation and amortization expense.

(d)Includes income (loss) from equity method investments, net gain (loss) on disposal of assets and other income.

(e)Storms in the first and third quarters of 2021 resulted in higher costs, including maintenance and repairs.

The following information presents certain benchmark prices in our marketing areas and market indicators that we believe are helpful in understanding the results of our Refining & Marketing segment. The benchmark crack spreads below do not reflect the market cost of RINs necessary to meet EPA renewable volume obligations for attributable products under the Renewable Fuel Standard.

	Three Months Ended  September 30,				Nine Months Ended  September 30,
	2022		2021		2022		2021
Benchmark Spot Prices (dollars per gallon)
Chicago CBOB unleaded regular gasoline	$	2.89	$	2.19	$	3.01	$	1.97
Chicago ULSD	3.53		2.14		3.45		1.98
USGC CBOB unleaded regular gasoline	2.65		2.15		2.92		1.94
USGC ULSD	3.49		2.08		3.49		1.91
LA CARBOB	3.46		2.29		3.47		2.12
LA CARB diesel	3.56		2.17		3.56		1.98

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	Three Months Ended  September 30,				Nine Months Ended  September 30,
	2022		2021		2022		2021
Market Indicators (dollars per barrel)
WTI	$	91.43	$	70.52	$	98.25	$	65.04
MEH	93.77		71.17		100.10		65.95
ANS	99.13		72.69		102.62		67.52
Crack Spreads:
Mid-Continent WTI 3-2-1	$	31.01	$	13.53	$	27.74	11.27
USGC MEH 3-2-1	21.07		10.70		23.21		8.47
West Coast ANS 3-2-1	39.22		14.60		37.35		12.92
Blended 3-2-1(a)	28.68		12.61		27.85		10.48
Crude Oil Differentials:
Sweet	$	(0.13)	$	(0.49)	$	0.11	$	(0.59)
Sour	(8.47)		(4.62)		(6.15)		(3.62)

(a)    Blended 3-2-1 Mid-Continent/USGC/West Coast crack spread is 40/40/20 percent in 2022 and 2021.

Third Quarter 2022 Compared to Third Quarter 2021

Refining & Marketing segment revenues increased $13.22 billion primarily due to increased average refined product sales prices of $0.90 per gallon and increased refined product sales volumes of 48 mbpd.

Net refinery throughputs increased 171 mbpd during the third quarter of 2022, primarily due to continuing recovery in demand for our products across all our regions.

Refining & Marketing segment adjusted EBITDA increased $4.30 billion primarily due to higher per barrel margins and higher throughput, partially offset by increased refining operating costs and distribution costs, both excluding depreciation and amortization.

Refining & Marketing margin, excluding LIFO inventory charge, was $30.31 per barrel for the third quarter of 2022 compared to $14.51 per barrel for the third quarter of 2021. Refining & Marketing margin is affected by our performance against the market indicators shown earlier, which use spot market values and an estimated mix of crude purchases and product sales. Based on the market indicators and our crude oil throughput, we estimate a net positive impact of approximately $5 billion on Refining & Marketing margin for the third quarter of 2022 compared to the third quarter of 2021, primarily due to wider crack spreads. Our reported Refining & Marketing margin differs from market indicators due to the mix of crudes purchased and their costs, the effect of market structure on our crude oil acquisition prices, the effect of RIN prices on the crack spread, and other items like refinery yields, other feedstock variances, fuel margin from sales to direct dealers, and for the third quarter of 2022, a LIFO inventory charge of $28 million. These factors had an estimated net negative effect of approximately $300 million on Refining & Marketing segment income in the third quarter of 2022 compared to the third quarter of 2021.

For the three months ended September 30, 2022, refining operating costs, excluding depreciation and amortization and storm impacts, increased $262 million, or $0.66 per barrel, compared to the three months ended September 30, 2021, primarily due to an increase in energy costs largely as a result of higher natural gas prices.

Distribution costs, excluding depreciation and amortization, increased $48 million and include fees paid to MPLX of $923 million and $844 million for the third quarter of 2022 and 2021, respectively. On a per barrel basis, distribution costs, excluding depreciation and amortization, decreased $0.12 per barrel due to higher throughput.

Refining planned turnaround costs increased $179 million, or $0.61 per barrel, due to the scope and timing of turnaround activity.

Depreciation and amortization decreased $0.11 per barrel primarily due to higher throughput.

Nine Months Ended September 30, 2022 Compared to Nine Months Ended September 30, 2021

Refining & Marketing segment revenues increased $52.12 billion primarily due to increased average refined product sales prices of $1.15 per gallon and higher refined product sales volumes, which increased 134 mbpd.

Net refinery throughputs increased 217 mbpd in the first nine months of 2022, primarily due to continuing recovery in demand for our products across all our regions.

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Refining & Marketing segment adjusted EBITDA increased $12.66 billion primarily driven by higher per barrel margins and higher throughput, partially offset by increased refining operating costs and distribution costs, both excluding depreciation and amortization.

Refining & Marketing margin, excluding LIFO inventory charge, was $28.08 per barrel for the first nine months of 2022 compared to $12.46 per barrel for the first nine months of 2021. Refining & Marketing margin is affected by the market indicators shown earlier, which use spot market values and an estimated mix of crude purchases and product sales. Based on the market indicators and our crude oil throughput, we estimate a net positive impact of approximately $15 billion on Refining & Marketing margin for the first nine months of 2022 compared to the first nine months of 2021, primarily due to wider crack spreads. Our reported Refining & Marketing margin differs from market indicators due to the mix of crudes purchased and their costs, market structure on our crude oil acquisition prices, RIN prices on the crack spread, and other items like refinery yields, other feedstock variances, fuel margin from sales to direct dealers, and for the first nine months of 2022, a LIFO inventory charge of $28 million. These factors had an estimated net negative effect of approximately $1 billion on Refining & Marketing segment income in the first nine months of 2022 compared to the first nine months of 2021.

For the nine months ended September 30, 2022, refining operating costs, excluding depreciation and amortization and storm impacts, increased $659 million, or $0.46 per barrel, compared to the nine months ended September 30, 2021, primarily due to an increase in energy costs largely as a result of higher natural gas and electricity prices.

Distribution costs, excluding depreciation and amortization, increased $91 million for the first nine months of 2022 and include fees paid to MPLX of $2.73 billion and $2.56 billion for the first nine months of 2022 and 2021, respectively. On a per barrel basis, distribution costs, excluding depreciation and amortization, decreased $0.26 per barrel due to higher throughput.

Refining planned turnaround costs increased $302 million, or $0.34 per barrel, due to the scope and timing of turnaround activity.

Depreciation and amortization decreased $0.15 per barrel primarily due to higher throughput.

We purchase RINs to satisfy a portion of our RFS2 compliance. Our expenses associated with purchased RINs were $1.83 billion and $1.12 billion, net of benefits related to retroactive changes in renewable volume obligation requirements, in the first nine months of 2022 and 2021, respectively. The RINs expense is included in Refining & Marketing margin. The increase in the first nine months of 2022, was primarily due to higher weighted average RIN costs and an increase in RIN obligations.

Supplemental Refining & Marketing Statistics

	Three Months Ended  September 30,		Nine Months Ended  September 30,
	2022	2021	2022	2021
Refining & Marketing Operating Statistics
Crude oil capacity utilization percent(a)	98	93	96	90
Refinery throughputs (mbpd):
Crude oil refined	2,823	2,684	2,781	2,594
Other charge and blendstocks	184	152	189	159
Net refinery throughput	3,007	2,836	2,970	2,753
Sour crude oil throughput percent	48	45	48	47
Sweet crude oil throughput percent	52	55	52	53
Refined product yields (mbpd):
Gasoline	1,501	1,451	1,507	1,404
Distillates	1,134	968	1,079	944
Propane	73	53	72	51
NGLs and petrochemicals	199	272	194	265
Heavy fuel oil	43	32	61	32
Asphalt	91	93	90	94
Total	3,041	2,869	3,003	2,790
Refined product export sales volumes (mbpd)(b)	335	294	310	256

(a)Based on calendar-day capacity, which is an annual average that includes down time for planned maintenance and other normal operating activities.

(b)Represents fully loaded export cargoes for each time period. These sales volumes are included in the total sales volume amounts.

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Midstream

The following includes key financial and operating data for the third quarter of 2022 compared to the third quarter of 2021 and the nine months ended September 30, 2022 compared to the nine months ended September 30, 2021.

(a)On owned common-carrier pipelines, excluding equity method investments.

(b)Includes amounts related to MPLX operated unconsolidated equity method investments on a 100 percent basis.

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	Three Months Ended  September 30,				Nine Months Ended  September 30,
Benchmark Prices	2022		2021		2022		2021
Natural Gas NYMEX HH ($ per MMBtu)	$	7.91	$	4.31	$	6.67	$	3.34
C2 + NGL Pricing ($ per gallon)(a)	$	1.01	$	0.96	$	1.11	$	0.81

(a)C2 + NGL pricing based on Mont Belvieu prices assuming an NGL barrel of approximately 35 percent ethane, 35 percent propane, 6 percent iso-butane, 12 percent normal butane and 12 percent natural gasoline.

Third Quarter 2022 Compared to Third Quarter 2021

Midstream segment revenue and segment adjusted EBITDA increased $304 million and $123 million, respectively. Results for the quarter benefited from higher revenue, primarily due to higher volumes, terminal activity and increased income from equity method investments, partially offset by higher operating costs.

Nine Months Ended September 30, 2022 Compared to Nine Months Ended September 30, 2021

Midstream segment revenue and segment adjusted EBITDA increased $1.06 billion and $352 million, respectively. Results benefited from higher revenue primarily due to higher natural gas liquids prices and volumes, increased pipeline throughputs, terminal activity and increased income from equity affiliates, partially offset by higher operating expenses in the first nine months of 2022.

Corporate

Key Financial Information (millions of dollars)	Three Months Ended  September 30,				Nine Months Ended  September 30,
	2022		2021		2022	2021
Corporate(a)	$	(173)	$	(186)	(494)	(523)

(a)Corporate costs consist primarily of MPC’s corporate administrative expenses and costs related to certain non-operating assets, except for corporate overhead expenses attributable to MPLX, which are included in the Midstream segment. Corporate costs include depreciation and amortization of $13 million and $45 million for the third quarter of 2022 and 2021, respectively, and $40 million and $151 million for the nine months ended September 30, 2022 and 2021, respectively.

Items not Allocated to Segments

Key Financial Information (millions of dollars)	Three Months Ended  September 30,				Nine Months Ended  September 30,
	2022		2021		2022		2021
Items not allocated to segments:
Gain on sale of assets	$	1,058	$	—	$	1,058	$	—
Renewable volume obligation requirements	—		—		238		—
Litigation	—		—		27		—
Impairments	—		—		—		(13)
Idling expenses	—		(12)		—		(12)
Total items not allocated to segments:	$	1,058	$	(12)	$	1,323	$	(25)

Third Quarter 2022 Compared to Third Quarter 2021

In the third quarter of 2022, total items not allocated to segments includes the non-cash gain of $549 million on the formation of the Martinez Renewables joint venture and the non-cash gain of $509 million on a lease reclassification.

Nine Months Ended September 30, 2022 Compared to Nine Months Ended September 30, 2021

In the first nine months of 2022, total items not allocated to segments primarily includes the non-cash gain of $549 million on the formation of the Martinez Renewables joint venture, the non-cash gain of $509 million on a lease reclassification and a $238 million benefit related to retroactive changes in renewable volume obligation requirements published by the EPA for 2020 and 2021.

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Non-GAAP Financial Measure

Management uses a financial measure to evaluate our operating performance that is calculated and presented on the basis of a methodology other than in accordance with GAAP. We believe this non-GAAP financial measure is useful to investors and analysts to assess our ongoing financial performance because, when reconciled to its most comparable GAAP financial measure, it provides improved comparability between periods through the exclusion of certain items that we believe are not indicative of our core operating performance and that may obscure our underlying business results and trends. This measure should not be considered a substitute for, or superior to, measures of financial performance prepared in accordance with GAAP, and our calculation thereof may not be comparable to similarly titled measures reported by other companies. The non-GAAP financial measure we use is as follows:

Refining & Marketing Margin

Refining & Marketing margin is defined as sales revenue less the cost of refinery inputs and purchased products and excludes other items as reflected in the table below.

Reconciliation of Refining & Marketing income from operations to Refining & Marketing gross margin and Refining & Marketing margin

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(Millions of dollars)	2022		2021		2022		2021
Refining & Marketing income from operations	$	4,625	$	509	$	12,527	$	135
Plus (Less):
Selling, general and administrative expenses	614		540		1,696		1,495
Income from equity method investments	(21)		(8)		(39)		(27)
Net gain on disposal of assets	—		(3)		(37)		(6)
Other income	(191)		(146)		(606)		(289)
Refining & Marketing gross margin	5,027		892		13,541		1,308
Plus (Less):
Operating expenses (excluding depreciation and amortization)	2,861		2,527		7,804		7,107
Depreciation and amortization	459		462		1,395		1,406
Gross margin excluded from and other income included in Refining & Marketing margin(a)	51		(58)		136		(353)
Other taxes included in Refining & Marketing margin	(40)		(38)		(132)		(104)
Refining & Marketing margin	8,358		3,785		22,744		9,364
LIFO inventory charge	28		—		28		—
Refining & Marketing margin, excluding LIFO inventory charge	$	8,386	$	3,785	$	22,772	$	9,364

(a)Reflects the gross margin, excluding depreciation and amortization, of other related operations included in the Refining & Marketing segment and processing of credit card transactions on behalf of certain of our marketing customers, net of other income.

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LIQUIDITY AND CAPITAL RESOURCES

Cash Flows

Our consolidated cash and cash equivalents balance for continuing operations was approximately $7.38 billion at September 30, 2022 compared to $5.29 billion at December 31, 2021. Net cash provided by (used in) operating activities, investing activities and financing activities are presented in the following table.

	Nine Months Ended  September 30,
(Millions of dollars)	2022		2021
Net cash provided by (used in):
Operating activities - continuing operations	$	12,023	$	3,546
Operating activities - discontinued operations	(44)		(2,860)
Total operating activities	11,979		686
Investing activities - continuing operations	1,121		(7,965)
Investing activities - discontinued operations	—		21,314
Total investing activities	1,121		13,349
Financing activities	(11,011)		(8,716)
Total increase (decrease) in cash	$	2,089	$	5,319

Operating Activities

Continuing Operations

Net cash provided by continuing operations increased $8.48 billion in the first nine months of 2022 compared to the first nine months of 2021. The change in net cash provided by continuing operations is primarily due to an increase in operating results and an unfavorable change in working capital of $961 million when comparing the change in working capital in both periods.

For the first nine months of 2022, changes in working capital, excluding changes in short-term debt, were a net $1.27 billion use of cash primarily due to the effects of increasing energy commodity prices at the end of the period on working capital. Accounts payable increased primarily due to an increase in crude prices, partially offset by a decrease in crude volumes. Current receivables increased primarily due to increases in refined product prices and volumes and crude prices, partially offset by a decrease in crude volumes. Inventories increased primarily due to increases in crude and refined product inventories.

For the first nine months of 2021, changes in working capital, excluding changes in short-term debt, were a net $307 million use of cash primarily due to the effects of increasing energy commodity prices and volumes at the end of the period on working capital. Accounts payable increased primarily due to increases in crude prices and volumes. Current receivables increased primarily due to higher crude and refined product prices and volumes. Inventories increased due to increases in refined product and crude inventories.

Discontinued Operations

Net cash used in discontinued operations reflects the results of the Speedway business. The change from 2021 is due to the sale of Speedway on May 14, 2021. The $44 million use of cash in the first nine months of 2022 represents payment of state income tax liabilities.

Investing Activities

Continuing Operations

Net cash provided by continuing operations was $1.12 billion in the first nine months of 2022 compared to net cash used by continuing operations of $7.97 billion in the first nine months of 2021.

•The change in net cash provided by continuing operations is primarily due to maturities and sales of short-term investments of $4.40 billion and $1.14 billion, respectively, partially offset by purchases of short-term investments of $3.74 billion in the first nine months of 2022. The cash provided by maturities and sales of short-term investments was primarily used to fund our return of capital initiatives announced as part of the Speedway sale.

•In the first nine months of 2021 net cash used by continuing operations primarily included purchases of short-term investments of $9.46 billion, partially offset by maturities and sales of short-term investments of $1.65 billion and $455 million, respectively.

•Additions to property, plant and equipment increased $711 million primarily due to increased capital expenditures in our Refining & Marketing and Midstream segments. See the “Capital Requirements” section for additional information on our capital investment plan.

•Cash used for acquisitions of $74 million includes acquisitions in our Refining & Marketing and Midstream segments.

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•Cash provided by net investments was $296 million for the first nine months of 2022 compared to a net use of cash of $111 million for the first nine months of 2021 mainly due to a $500 million cash distribution received from the Martinez Renewables joint venture at its formation, partially offset by increased MPLX contributions to equity method investments, which included the $60 million contribution to its Bakken Pipeline joint venture to fund its share of a debt repayment by the joint venture.

The consolidated statements of cash flows exclude changes to the consolidated balance sheets that did not affect cash. A reconciliation of additions to property, plant and equipment per the consolidated statements of cash flows to reported total capital expenditures and investments follows.

	Nine Months Ended  September 30,
(Millions of dollars)	2022		2021
Additions to property, plant and equipment per the consolidated statements of cash flows	$	1,694	$	983
Increase in capital accruals	30		31
Total capital expenditures	1,724		1,014
Investments in equity method investees (excludes acquisitions)	215		150
Total capital expenditures and investments	$	1,939	$	1,164

Discontinued Operations

The change in net cash used in discontinued operations is primarily due to the sale of Speedway on May 14, 2021.

Financing Activities

Financing activities were a net $11.01 billion use of cash in the first nine months of 2022 compared to a net $8.72 billion use of cash in the first nine months of 2021.

•MPC had net borrowings of $1.02 billion under its commercial paper program in the first nine months of 2021.

•Long-term debt borrowings and repayments were a net $1.08 billion source of cash in the first nine months of 2022 compared to a net $3.30 billion use of cash in the first nine months of 2021. During the first nine months of 2022, MPLX issued $2.5 billion of senior notes, redeemed $1.0 billion of senior notes and had net payments of $300 million under its revolving credit facility.

During the first nine months of 2021, MPC repaid $1.3 billion of senior notes, borrowed and repaid $3.65 billion under its revolving credit facility and borrowed and repaid $4.65 billion under its trade receivables facility. MPLX redeemed $1.75 billion of senior notes and had net payments of $175 million under its revolving credit facility.

•Cash used in common stock repurchases, including fees and expenses, totaled $10.09 billion in the first nine months of 2022 compared to $1.91 billion in the first nine months of 2021. See the “Capital Requirements” section for further discussion of our stock repurchases.

•Cash used in dividend payments decreased $202 million primarily due to a reduction of shares resulting from share repurchases in 2022 and 2021.

•Cash used in repurchases of noncontrolling interests was $315 million in the first nine months of 2022 compared to $465 million in the first nine months of 2021 related to the repurchase of MPLX common units. See Note 5 to the unaudited consolidated financial statements for further discussion of MPLX.

Derivative Instruments

See Item 3. Quantitative and Qualitative Disclosures about Market Risk for a discussion of derivative instruments and associated market risk.

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Capital Resources

MPC, Excluding MPLX

We control MPLX through our ownership of the general partner; however, the creditors of MPLX do not have recourse to MPC’s general credit through guarantees or other financial arrangements, except as noted. MPC has effectively guaranteed certain indebtedness of LOOP and LOCAP, in which MPLX holds an interest. Therefore, in the following table, we present the liquidity of MPC, excluding MPLX. MPLX liquidity is discussed in the following section.

Our liquidity, excluding MPLX, totaled $16.01 billion at September 30, 2022 consisting of:

	September 30, 2022
(Millions of dollars)	Total Capacity		Outstanding Borrowings		Outstanding Letters of Credit		Available Capacity
Bank revolving credit facility	$	5,000	$	—	$	1	$	4,999
Trade receivables facility(a)	100		—		100		—
Total	$	5,100	$	—	$	101	$	4,999
Cash and cash equivalents and short-term investments(b)							11,014
Total liquidity							$	16,013

(a)The committed borrowing and letter of credit issuance capacity of the trade receivables securitization facility is $100 million. In addition, the facility allows for the issuance of letters of credit in excess of the committed capacity at the discretion of the issuing banks. As of September 30, 2022, letters of credit in the total amount of $1.15 billion were issued and outstanding under the facility to secure contracts awarded by the Department of Energy to purchase crude oil from the Strategic Petroleum Reserve. In July 2022, the trade receivables securitization facility was amended to, among other things, extend its term until September 29, 2023.

(b)Excludes cash and cash equivalents of MPLX of $121 million.

Because of the alternatives available to us, including internally generated cash flow and access to capital markets and a commercial paper program, we believe that our short-term and long-term liquidity is adequate to fund not only our current operations, but also our near-term and long-term funding requirements, including capital spending programs, the repurchase of shares of our common stock, dividend payments, defined benefit plan contributions, repayment of debt maturities and other amounts that may ultimately be paid in connection with contingencies.

We have a commercial paper program that allows us to have a maximum of $2.0 billion in commercial paper outstanding. We do not intend to have outstanding commercial paper borrowings in excess of available capacity under our bank revolving credit facility. At September 30, 2022, we had no borrowings outstanding under the commercial paper program.

On July 7, 2022, MPC entered into a new five-year revolving credit agreement (the “New MPC Credit Agreement”) to replace its previous $5.0 billion credit facility that was scheduled to expire in October 2023. The New MPC Credit Agreement, among other things, provides for a $5.0 billion unsecured revolving credit facility that matures in July 2027 and letter of credit issuing capacity under the facility of up to $2.2 billion. Letters of credit issuing capacity is included in, not in addition to, the $5.0 billion borrowing capacity. The financial covenants of the New MPC Credit Agreement are substantially the same as those contained in the previous credit agreement.

The New MPC Credit Agreement and trade receivables facility contain representations and warranties, affirmative and negative covenants and events of default that we consider usual and customary for agreements of these types. The financial covenant included in the New MPC Credit 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 New MPC Credit Agreement) of no greater than 0.65 to 1.00.

As of September 30, 2022, we were in compliance with the covenants required by the agreements governing MPC’s previous revolving credit facility and MPC’s trade receivables facility, including the financial covenant with a ratio of Consolidated Net Debt to Total Capitalization of approximately 0.00 to 1.00.

Our intention is to maintain an investment-grade credit profile. As of September 30, 2022, the credit ratings on our senior unsecured debt are as follows.

 

Company	Rating Agency	Rating
MPC	Moody’s	Baa2 (stable outlook)
	Standard & Poor’s	BBB (stable outlook)
	Fitch	BBB (stable outlook)

The ratings reflect the respective views of the rating agencies. Although it is our intention to maintain a credit profile that supports an investment grade rating, there is no assurance that these ratings will continue for any given period of time. The ratings may be revised or withdrawn entirely by the rating agencies if, in their respective judgments, circumstances so warrant.

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The New MPC Credit Agreement does not contain credit rating triggers that would result in the acceleration of interest, principal or other payments in the event that our credit ratings are downgraded. However, any downgrades of our senior unsecured debt could increase the applicable interest rates, yields and other fees payable thereunder and may limit our flexibility to obtain financing in the future, including to refinance existing indebtedness. In addition, a downgrade of our senior unsecured debt rating to below investment-grade levels could, under certain circumstances, impact our ability to purchase crude oil on an unsecured basis and could result in us having to post letters of credit under existing transportation services or other agreements.

See Note 18 to the unaudited consolidated financial statements for further discussion of our debt.

MPLX

MPLX’s liquidity totaled $3.62 billion at September 30, 2022 consisting of:

	September 30, 2022
(Millions of dollars)	Total Capacity		Outstanding Borrowings		Outstanding Letters of Credit		Available Capacity
MPLX LP - bank revolving credit facility	$	2,000	$	—	$	—	$	2,000
MPC intercompany loan agreement	1,500		—		—		1,500
Total	$	3,500	$	—	$	—	$	3,500
Cash and cash equivalents							121
Total liquidity							$	3,621

On March 14, 2022, MPLX issued $1.5 billion aggregate principal amount of 4.950% senior notes due March 2052 in an underwritten public offering. The net proceeds were used to repay amounts outstanding under the MPC intercompany loan agreement and the MPLX credit agreement.

On July 7, 2022, MPLX entered into a new five-year revolving credit agreement (the “New MPLX Credit Agreement”) to replace its previous $3.5 billion credit facility that was scheduled to expire in July 2024. The New MPLX Credit Agreement, among other things, provides for a $2.0 billion unsecured revolving credit facility that matures in July 2027 and letter of credit issuing capacity under the facility of up to $150 million. Letters of credit issuing capacity is included in, not in addition to, the $2.0 billion borrowing capacity. The financial covenants of the New MPLX Credit Agreement are substantially the same as those contained in the previous credit agreement.

On August 11, 2022, MPLX issued $1.0 billion aggregate principal amount of 4.950% senior notes due September 2032 in an underwritten public offering. The net proceeds were used to redeem all of the $500 million aggregate principal amount of 3.500% senior notes due December 2022, $14 million of which was issued by Andeavor Logistics LP, and to redeem all of the $500 million aggregate principal amount of 3.375% senior notes due March 2023.

The New MPLX Credit Agreement contains 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. The financial covenant 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 during the six-month period following certain acquisitions). Consolidated EBITDA is subject to adjustments for certain acquisitions completed and capital projects undertaken during the relevant period. Other covenants restrict MPLX and/or certain of its subsidiaries from incurring debt, creating liens on assets and entering into transactions with affiliates.

As of September 30, 2022, MPLX was in compliance with the covenants required by the agreement governing MPLX’s previous revolving credit facility, including the financial covenant with a ratio of Consolidated Total Debt to Consolidated EBITDA of 3.50 to 1.0.

Our intention is to maintain an investment-grade credit profile for MPLX. As of September 30, 2022, the credit ratings on MPLX’s senior unsecured debt are as follows.

 

Company	Rating Agency	Rating
MPLX	Moody’s	Baa2 (stable outlook)
	Standard & Poor’s	BBB (stable outlook)
	Fitch	BBB (stable outlook)

The ratings reflect the respective views of the rating agencies. Although it is our intention to maintain a credit profile that supports an investment grade rating for MPLX, there is no assurance that these ratings will continue for any given period of time. The ratings may be revised or withdrawn entirely by the rating agencies if, in their respective judgments, circumstances so warrant.

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The agreements governing MPLX’s debt obligations do not contain credit rating triggers that would result in the acceleration of interest, principal or other payments in the event that MPLX credit ratings are downgraded. However, any downgrades of MPLX senior unsecured debt to below investment grade ratings could increase the applicable interest rates, yields and other fees payable under such agreements. In addition, a downgrade of MPLX senior unsecured debt ratings to below investment-grade levels may limit MPLX’s ability to obtain future financing, including to refinance existing indebtedness.

See Note 18 to the unaudited consolidated financial statements for further discussion of MPLX’s debt.

Capital Requirements

Capital Investment Plan

MPC's capital investment plan for 2022 totals approximately $1.7 billion for capital projects and investments, excluding capitalized interest, potential acquisitions and MPLX’s capital investment plan. MPC’s capital investment plan includes all of the planned capital spending for Refining & Marketing and Corporate, as well as a portion of the planned capital investments for Midstream. The remainder of the planned capital spending for Midstream reflects the capital investment plan for MPLX, which totals $900 million. We continuously evaluate our capital investment plan and make changes as conditions warrant.

Capital expenditures and investments for MPC and MPLX are summarized below.

	Nine Months Ended  September 30,
(Millions of dollars)	2022		2021
Capital expenditures and investments:(a)
MPC continuing operations, excluding MPLX
Refining & Marketing	$	1,004	$	538
Midstream - Other	7		42
Corporate and Other(b)	87		72
Total MPC continuing operations, excluding MPLX	$	1,098	$	652
MPC discontinued operations - Speedway	$	—	$	177
Midstream - MPLX	$	765	$	464

(a)    Capital expenditures include changes in capital accruals.

(b)    Excludes capitalized interest of $76 million and $48 million for the nine months ended September 30, 2022 and 2021, respectively.

Capital expenditures and investments in affiliates during the nine months ended September 30, 2022, were primarily for Refining & Marketing and Midstream projects. Major Refining & Marketing projects include renewables projects, primarily the Martinez facility conversion, the South Texas Asset Repositioning project and projects that we expect will help us reduce future operating costs.

Major Midstream projects were primarily for MPLX gas gathering, processing and de-ethanization projects in the Bakken, Marcellus, and Southwest regions and the expansion of MPLX crude gathering systems in the Permian and Bakken regions. Spending also included the $60 million contribution to MPLX’s Bakken Pipeline joint venture to fund MPLX’s share of a debt repayment by the joint venture.

Share Repurchases

On August 2, 2022, we announced our board of directors approved an incremental $5.0 billion share repurchase authorization bringing total share repurchase authorizations for 2022 to $10.0 billion. The authorization has no expiration date.

During the nine months ended September 30, 2022, MPC repurchased approximately 115 million shares of its common stock at an average cost per share of $88.07 and paid $10.09 billion of cash.

From January 1, 2012 through September 30, 2022, our board of directors has approved $35.05 billion in total share repurchase authorizations and we have repurchased a total of $29.94 billion of our common stock. As of September 30, 2022, MPC has $5.11 billion remaining under its share repurchase authorizations, which reflects the repurchase of 1,577,829 common shares for $157 million that were transacted in the third quarter of 2022 and settled in the fourth quarter of 2022.

We may utilize various methods to effect the repurchases, which could include open market repurchases, negotiated block transactions, tender offers, accelerated share repurchases or open market solicitations for shares, some of which may be effected 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.

48

MPLX Unit Repurchases

On August 2, 2022, MPLX announced its board of directors approved an incremental $1.0 billion unit repurchase authorization. This unit repurchase authorization has no expiration date.

During the nine months ended September 30, 2022, MPLX repurchased approximately 10 million MPLX common units at an average cost per unit of $31.98 and paid $315 million of cash. As of September 30, 2022, approximately $1.0 billion remained available under the authorization for future unit repurchases, which reflects the repurchase of 532,326 common units for $16 million that were transacted in the third quarter of 2022 and settled in the fourth quarter of 2022.

MPLX may utilize various methods to effect the repurchases, which could include open market repurchases, negotiated block transactions, tender offers, accelerated share repurchases or open market solicitations for units, some of which may be effected 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.

Cash Commitments

Contractual Obligations

As of September 30, 2022, our purchase commitments primarily consist of obligations to purchase and transport crude oil used in our refining operations. During the first nine months of 2022, there were no material changes to our contractual obligations outside the ordinary course of business since December 31, 2021.

Our other contractual obligations primarily consist of long-term debt and pension and post-retirement obligations, for which additional information is included in Notes 18 and 22, respectively, to the unaudited consolidated financial statements, and financing and operating leases.

Other Cash Commitments

On November 1, 2022, our board of directors approved a dividend of $0.75 per share on common stock. The dividend is payable December 12, 2022, to shareholders of record as of the close of business on November 16, 2022.

We may, from time to time, repurchase our senior notes in the open market, in tender offers, in privately-negotiated transactions or otherwise in such volumes, at such prices and upon such other terms as we deem appropriate.

ENVIRONMENTAL MATTERS AND COMPLIANCE COSTS

We have incurred and may continue to incur substantial capital, operating and maintenance, and remediation expenditures as a result of environmental laws and regulations. If these expenditures, as with all costs, are not ultimately reflected in the prices of our products and services, our operating results will be adversely affected. We believe that substantially all of our competitors must comply with similar environmental laws and regulations. However, the specific impact on each competitor may vary depending on a number of factors, including the age and location of its operating facilities, marketing areas, production processes and whether it is also engaged in the petrochemical business or the marine transportation of crude oil and refined products.

As previously disclosed in our Annual Report on Form 10-K for the year ended December 31, 2021, actual expenditures may vary as the number and scope of environmental projects are revised as a result of improved technology or changes in regulatory requirements. During the first quarter the Company identified an additional project to be included in 2022 environmental capital expenditures, bringing the total expenditures anticipated for 2022 to $85 million. This amount is reflected in the Company’s 2022 capital plan.

There have been no additional significant changes to our environmental matters and compliance costs during the nine months ended September 30, 2022.

CRITICAL ACCOUNTING ESTIMATES

As of September 30, 2022, there have been no significant changes to our critical accounting estimates since our Annual Report on Form 10-K for the year ended December 31, 2021.

ACCOUNTING STANDARDS NOT YET ADOPTED

We have not identified any recent accounting pronouncements that are expected to have a material impact on our financial condition, results of operations or cash flows upon adoption.

Item 3. Quantitative and Qualitative Disclosures about Market Risk

For a detailed discussion of our risk management strategies and our derivative instruments, see Item 7A. Quantitative and Qualitative Disclosures about Market Risk in our Annual Report on Form 10-K for the year ended December 31, 2021.

49

See Notes 16 and 17 to the unaudited consolidated financial statements for more information about the fair value measurement of our derivatives, as well as the amounts recorded in our consolidated balance sheets and statements of income. We do not designate any of our commodity derivative instruments as hedges for accounting purposes.

The following table includes the composition of net losses on our commodity derivative positions as of September 30, 2022 and 2021, respectively.

	Nine Months Ended  September 30,
(Millions of dollars)	2022		2021
Realized loss on settled derivative positions	$	(217)	$	(270)
Unrealized gain (loss) on open net derivative positions	153		(118)
Net loss	$	(64)	$	(388)

See Note 17 to the unaudited consolidated financial statements for additional information on our open derivative positions at September 30, 2022.

Sensitivity analysis of the effects on income from operations (“IFO”) of hypothetical 10 percent and 25 percent increases and decreases in commodity prices for open commodity derivative instruments as of September 30, 2022 is provided in the following table.

	Change in IFO from a Hypothetical Price Increase of				Change in IFO from a Hypothetical Price Decrease of
(Millions of dollars)	10%		25%		10%		25%
As of September 30, 2022
Crude	$	(61)	$	(152)	$	61	$	152
Refined products	(5)		(11)		5		11
Blending products	(25)		(62)		25		62
Soybean oil	(10)		(26)		10		26

We remain at risk for possible changes in the market value of commodity derivative instruments; however, such risk should be mitigated by price changes in the underlying physical commodity. Effects of these offsets are not reflected in the above sensitivity analysis.

We evaluate our portfolio of commodity derivative instruments on an ongoing basis and add or revise strategies in anticipation of changes in market conditions and in risk profiles. Changes to the portfolio after September 30, 2022 would cause future IFO effects to differ from those presented above.

Sensitivity analysis of the effect of a hypothetical 100-basis-point change in interest rates on long-term debt, including the portion classified as current and excluding finance leases, as of September 30, 2022 is provided in the following table. The fair value of cash and cash equivalents, receivables, accounts payable and accrued interest approximate carrying value and, in addition to short-term investments which are recorded at fair value, are relatively insensitive to changes in interest rates due to the short-term maturity of the instruments. Accordingly, these instruments are excluded from the table.

(Millions of dollars)	Fair Value as of September 30, 2022(a)		Change in Fair Value(b)		Change in Net Income for the Nine Months Ended September 30, 2022(c)
Long-term debt
Fixed-rate	$	23,519	$	1,828	n/a
Variable-rate	—		—		$	—

(a)Fair value was based on market prices, where available, or current borrowing rates for financings with similar terms and maturities.

(b)Assumes a 100-basis-point decrease in the weighted average yield-to-maturity at September 30, 2022.

(c)Assumes a 100-basis-point change in interest rates. The change to net income was based on the weighted average balance of debt outstanding for the nine months ended September 30, 2022.

At September 30, 2022, our long-term debt was composed of fixed-rate instruments. The fair value of our fixed-rate debt is relatively sensitive to interest rate fluctuations. Our sensitivity to interest rate declines and corresponding increases in the fair value of our debt unfavorably affects our results of operations and cash flows only when we elect to repurchase or otherwise retire fixed-rate debt at prices above carrying value. Interest rate fluctuations generally do not impact the fair value of our variable-rate debt, but may affect our results of operations and cash flows.

50

See Note 16 to the unaudited consolidated financial statements for additional information on the fair value of our debt.

Item 4. Controls and Procedures

Disclosure Controls and Procedures

An evaluation of the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934, as amended) was carried out under the supervision and with the participation of our management, including our chief executive officer and chief financial officer. Based upon that evaluation, the chief executive officer and chief financial officer concluded that the design and operation of these disclosure controls and procedures were effective as of September 30, 2022, the end of the period covered by this report.

Changes in Internal Control over Financial Reporting

During the quarter ended September 30, 2022, there were no changes in our internal control over financial reporting that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

51

PART II – OTHER INFORMATION

Item 1. Legal Proceedings

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. While it is possible that an adverse result in one or more of the lawsuits or proceedings in which we are a defendant could be material to us, based upon current information and our experience as a defendant in other matters, we believe that these lawsuits and proceedings, individually or in the aggregate, will not have a material adverse effect on our consolidated results of operations, financial position or cash flows.

Item 103 of Regulation S-K promulgated by the SEC requires disclosure of certain environmental matters when a governmental authority is a party to the proceedings and such proceedings involve potential monetary sanctions, unless we reasonably believe that the matter will result in no monetary sanctions, or in monetary sanctions, exclusive of interest and costs, of less than $300,000.

Except as described below, there have been no material changes to the legal matters previously disclosed in our Annual Report on Form 10-K for the year ended December 31, 2021, or in our Quarterly Reports on Form 10-Q for the quarter ended March 31, 2022 or for the quarter ended June 30, 2022.

Dakota Access Pipeline

As previously disclosed in our Annual Report on Form 10-K for the year ended December 31, 2021, MPLX holds a 9.19 percent indirect interest in a joint venture (“Dakota Access”) that owns and operates the Dakota Access Pipeline and Energy Transfer Crude Oil Pipeline projects, collectively referred to as the Bakken Pipeline system or DAPL. In 2020, the U.S. District Court for the District of Columbia (the “D.D.C.”) ordered the U.S. Army Corps of Engineers (“Army Corps”), which granted permits and an easement for the Bakken Pipeline system, to prepare an environmental impact statement (“EIS”) relating to an easement under Lake Oahe in North Dakota. The D.D.C. later ordered vacatur of the easement during the pendency of the EIS. The EIS has been delayed and the Army Corps currently expects to release a draft EIS in the first half of 2023.

Tesoro High Plains Pipeline

As previously disclosed in our Annual Report on Form 10-K for the year ended December 31, 2021, in July 2020, Tesoro High Plains Pipeline Company, LLC (“THPP”), a subsidiary of MPLX, received a Notification of Trespass Determination from the Bureau of Indian Affairs (“BIA”) relating to a portion of the Tesoro High Plains Pipeline that crosses the Fort Berthold Reservation in North Dakota. The notification demanded the immediate cessation of pipeline operations and assessed trespass damages of approximately $187 million. On appeal, the Assistant Secretary - Indian Affairs vacated the BIA’s trespass order and remanded to the Regional Director for the BIA Great Plains Region to issue a new decision based on specified criteria. On December 15, 2020, the Regional Director of the BIA issued a new trespass notice to THPP, finding that THPP was in trespass and assessing trespass damages of approximately $4 million (including interest), which has been paid. The order also required that THPP immediately cease and desist use of the portion of the pipeline that crosses the property at issue. THPP has complied with the Regional Director’s December 15, 2020 notice. In March 2021, THPP received a copy of an order purporting to vacate all orders related to THPP’s alleged trespass issued by the BIA between July 2, 2020 and January 14, 2021. The order directs the Regional Director of the BIA to reconsider the issue of THPP’s alleged trespass and issue a new order, if necessary, after all interested parties have had an opportunity to be heard. On April 23, 2021, THPP filed a lawsuit in the District of North Dakota against the United States of America, the U.S. Department of the Interior and the BIA (together, the “U.S. Government Parties”) challenging the March order purporting to vacate all previous orders related to THPP’s alleged trespass. On February 8, 2022, the U.S. Government Parties filed their answer to THPP’s suit, asserting counterclaims for trespass and ejectment. The U.S. Government Parties claim THPP is in continued trespass with respect to the pipeline and seek disgorgement of pipeline profits from June 1, 2013 to present, removal of the pipeline and remediation. We intend to vigorously defend ourselves against these counterclaims. Negotiations with the holders of the property rights at issue to settle this matter have been unsuccessful.

Item 1A. Risk Factors

There have been no material changes from the risk factors previously disclosed in our Annual Report on Form 10-K for the year ended December 31, 2021.

52

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

The following table sets forth a summary of our purchases during the quarter ended September 30, 2022, of equity securities that are registered by MPC pursuant to Section 12 of the Securities Exchange Act of 1934, as amended.

					Millions of Dollars
Period	Total Number of Shares Purchased(a)	Average Price Paid per Share(b)		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Maximum Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs(c)(d)
07/01/2022-07/31/2022	14,944,509	$	84.11	14,944,395	$	2,917
08/01/2022-08/31/2022	13,565,867	97.47		13,565,867	6,594
09/01/2022-09/30/2022	15,422,410	96.38		15,422,410	5,108
Total	43,932,786	92.54		43,932,672

(a)The amounts in this column include 114, 0 and 0 shares of our common stock delivered by employees to MPC, upon vesting of restricted stock, to satisfy tax withholding requirements in July, August and September, respectively.

(b)Amounts in this column reflect the weighted average price paid for shares repurchased under our share repurchase authorizations and for shares tendered to us in satisfaction of employee tax withholding obligations upon the vesting of restricted stock granted under our stock plans. The weighted average price includes commissions paid to brokers during the quarter.

(c)On April 30, 2018, we announced that our board of directors had approved a $5.0 billion share repurchase authorization in addition to the remaining authorization pursuant to the May 31, 2017 announcement. On May 14, 2021, we announced that our board of directors had approved an additional $7.1 billion share repurchase authorization. On February 2, 2022, we announced that our board of directors had approved an additional $5.0 billion share repurchase authorization. On August 2, 2022, we announced that our board of directors had approved an additional $5.0 billion share repurchase authorization. These share repurchase authorizations have no expiration date.

(d)Reflects the payment of any commissions paid to brokers during the quarter.

53

Item 6. Exhibits

			Incorporated by Reference			Filed Herewith	Furnished Herewith
Exhibit Number	Exhibit Description	Form	Exhibit	Filing Date	SEC File No.
2.1†	Purchase and Sale Agreement, dated as of August 2, 2020, by and between MPC, the MPC subsidiaries party thereto and 7-Eleven, Inc.	8-K	2.1	8/3/2020	001-35054
2.2	Amendment to Purchase and Sale Agreement, dated as of October 16, 2020, by and among MPC, the MPC subsidiaries party thereto and 7-Eleven, Inc.	10-K	2.7	2/26/2021	001-35054
2.3†	Amendment No. 2 to Purchase and Sale Agreement, dated as of May 14, 2021, by and among the Company, Sellers and Purchaser	8-K	2.3	5/14/2021	001-35054
3.1	Restated Certificate of Incorporation of Marathon Petroleum Corporation, dated April 29, 2022	8-K	3.2	5/2/2022	001-35054
3.2	Amended and Restated Bylaws of Marathon Petroleum Corporation, dated October 27, 2021	10-Q	3.2	11/2/2021	001-35054
10.1	Revolving Credit Agreement, dated as of July 7, 2022, by and among Marathon Petroleum Corporation, as borrower, JPMorgan Chase Bank, N.A., as administrative agent, each of JPMorgan Chase Bank, N.A., Wells Fargo Securities, LLC, Barclays Bank PLC, BofA Securities, Inc., Citibank, N.A., Mizuho Bank, Ltd., MUFG Bank, Ltd., RBC Capital Markets, and TD Securities (USA) LLC, as joint lead arrangers and joint bookrunners, Wells Fargo Bank, National Association, as syndication agent, each of Bank of America, N.A., Barclays Bank PLC, Citibank, N.A., Mizuho Bank, Ltd., MUFG Bank, Ltd., Royal Bank of Canada and The Toronto-Dominion Bank, New York Branch, as documentation agents, and the other lenders and issuing banks that are parties thereto	8-K	10.1	7/12/2022	001-35054
10.2	Revolving Credit Agreement, dated as of July 7, 2022, by and among MPLX LP, as borrower, Wells Fargo Bank, National Association, as administrative agent, each of Wells Fargo Securities, LLC, JPMorgan Chase Bank, N.A., Barclays Bank PLC, BofA Securities, Inc., Citibank, N.A., Mizuho Bank, Ltd., MUFG Bank, Ltd., RBC Capital Markets and TD Securities (USA) LLC, as joint lead arrangers and joint bookrunners, JPMorgan Chase Bank, N.A., as syndication agent, each of Bank of America, N.A., Barclays Bank PLC, Citibank, N.A., Mizuho Bank, Ltd., MUFG Bank, Ltd., Royal Bank of Canada and The Toronto-Dominion Bank, New York Branch, as documentation agents,	8-K	10.1	7/12/2022	001-35714
31.1	Certification of Chief Executive Officer pursuant to Rule 13a-14 and 15d-14 under the Securities Exchange Act of 1934					X
31.2	Certification of Chief Financial Officer pursuant to Rule 13a-14 and 15d-14 under the Securities Exchange Act of 1934					X
32.1	Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350						X
32.2	Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350						X
101.INS	Inline XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded with the Inline XBRL document.
101.SCH	Inline XBRL Taxonomy Extension Schema Document.					X
101.PRE	Inline XBRL Taxonomy Extension Presentation Linkbase Document.					X
101.CAL	Inline XBRL Taxonomy Extension Calculation Linkbase Document.					X
101.DEF	Inline XBRL Taxonomy Extension Definition Linkbase Document.					X
101.LAB	Inline XBRL Taxonomy Extension Label Linkbase Document.					X
104	Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101).

54

†    The exhibits and schedules have been omitted pursuant to Item 601(b)(2) of Regulation S-K and will be provided to the Securities and Exchange Commission upon request.

55

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

November 1, 2022	MARATHON PETROLEUM CORPORATION
	By:	/s/ C. Kristopher Hagedorn
		C. Kristopher Hagedorn Senior Vice President and Controller

56

EX-31.1

Exhibit 31.1

MARATHON PETROLEUM CORPORATION

CERTIFICATION PURSUANT TO SECTION 302 OF

THE SARBANES-OXLEY ACT OF 2002

I, Michael J. Hennigan, certify that:

1.I have reviewed this report on Form 10-Q of Marathon Petroleum Corporation;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	November 1, 2022	/s/ Michael J. Hennigan
		Michael J. Hennigan
		President and Chief Executive Officer

EX-31.2

Exhibit 31.2

MARATHON PETROLEUM CORPORATION

CERTIFICATION PURSUANT TO SECTION 302 OF

THE SARBANES-OXLEY ACT OF 2002

I, Maryann T. Mannen, certify that:

1.I have reviewed this report on Form 10-Q of Marathon Petroleum Corporation;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	November 1, 2022	/s/ Maryann T. Mannen
		Maryann T. Mannen
		Executive Vice President and Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Marathon Petroleum Corporation (the “Company”) on Form 10-Q for the period ended September 30, 2022 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Michael J. Hennigan, President and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

(1)The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

November 1, 2022

/s/ Michael J. Hennigan

Michael J. Hennigan

President and Chief Executive Officer

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Marathon Petroleum Corporation (the “Company”) on Form 10-Q for the period ended September 30, 2022 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Maryann T. Mannen, Executive Vice President and Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

(1)The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

November 1, 2022

/s/ Maryann T. Mannen

Maryann T. Mannen

Executive Vice President and Chief Financial Officer

XML

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2022	Oct. 28, 2022
Cover [Abstract]
Entity Central Index Key	0001510295
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus (Q1,Q2,Q3,FY)	Q3
Amendment Flag	false
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2022
Document Transition Report	false
Entity File Number	001-35054
Entity Registrant Name	Marathon Petroleum Corporation
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	27-1284632
Entity Address, Address Line One	539 South Main Street
Entity Address, City or Town	Findlay
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	45840-3229
City Area Code	419
Local Phone Number	422-2121
Title of 12(b) Security	Common Stock, par value $.01
Trading Symbol	MPC
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		468,660,833

XML

Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021		Sep. 30, 2022		Sep. 30, 2021
Revenues and other income:
Sales and other operating revenues	$ 45,787	$ 32,321		$ 137,640	[1]	$ 84,647	[1]
Income from equity method investments	180	122		469		306
Net gain on disposal of assets	1,051	0		1,072		3
Other income	219	170		678		366
Total revenues and other income	47,237	32,613		139,859		85,322
Costs and expenses:
Cost of revenues (excludes items below)	38,821	29,563		118,096		77,824
Depreciation and amortization	794	836	[2]	2,418		2,551	[2]
Selling, general and administrative expenses	712	681		2,009		1,881
Other taxes	224	193		606		544
Total costs and expenses	40,551	31,273		123,129		82,800
Income from continuing operations	6,686	1,340		16,730		2,522
Net interest and other financial costs	240	328		814		1,053
Income from continuing operations before income taxes	6,446	1,012		15,916		1,469
Provision (benefit) for income taxes on continuing operations	1,426	(18)		3,507		21
Income from continuing operations, net of tax	5,020	1,030		12,409		1,448
Income from discontinued operations, net of tax	0	0		0		8,448
Net income	5,020	1,030		12,409		9,896
Less net income attributable to:
Redeemable noncontrolling interest	23	38		65		79
Noncontrolling interests	520	298		1,149		853
Net income attributable to MPC	$ 4,477	$ 694		$ 11,195		$ 8,964
Basic:
Continuing operations	$ 9.12	$ 1.10		$ 21.18		$ 0.80
Discontinued operations	0	0		0		13.10
Net income per share	$ 9.12	$ 1.10		$ 21.18		$ 13.90
Weighted average shares outstanding	491	633		528		645
Diluted:
Continuing operations	$ 9.06	$ 1.09		$ 21.04		$ 0.79
Discontinued operations	0	0		0		13.02
Net income per share	$ 9.06	$ 1.09		$ 21.04		$ 13.81
Weighted average shares outstanding	494	637		532		649

[1] Includes related party sales. See Note 7 for additional information

[2] The three and nine months ended September 30, 2021 includes $13 million and $56 million, respectively, of impairments of long lived assets.

XML

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Net income	$ 5,020	$ 1,030	$ 12,409	$ 9,896
Other comprehensive income	(114)	(4)	(112)	168
Comprehensive income	4,906	1,026	12,297	10,064
Less comprehensive income attributable to:
Redeemable noncontrolling interest	23	38	65	79
Noncontrolling interests	520	298	1,149	853
Comprehensive income attributable to MPC	4,363	690	11,083	9,132
Actuarial changes
Other comprehensive income	(104)	4	(71)	196
Prior service
Other comprehensive income	(13)	(8)	(38)	(24)
Other
Other comprehensive income	$ 3	$ 0	$ (3)	$ (4)

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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Actuarial changes
OCI, tax expense (benefit)	$ (34)	$ 1	$ (23)	$ 65
Prior service
OCI, tax expense (benefit)	(5)	(3)	(13)	(8)
Other
OCI, tax expense (benefit)	$ 1	$ 0	$ (1)	$ (2)

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Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Assets
Cash and cash equivalents	$ 7,376	$ 5,291
Short-term investments	3,759	5,548
Receivables, less allowance for doubtful accounts of $39 and $40, respectively	13,458	11,034
Inventories	9,834	8,055
Other current assets	858	568
Total current assets	35,285	30,496
Equity method investments	6,493	5,409
Property, plant and equipment, net	35,384	37,440
Goodwill	8,244	8,256
Right of use assets	1,200	1,372
Other noncurrent assets	3,088	2,400
Total assets	89,694	85,373
Liabilities
Accounts payable	16,682	13,700
Payroll and benefits payable	773	911
Accrued taxes	1,042	1,231
Debt due within one year	1,064	571
Operating lease liabilities	355	438
Other current liabilities	1,398	1,047
Total current liabilities	21,314	17,898
Long-term debt	25,638	24,968
Deferred income taxes	5,610	5,638
Defined benefit postretirement plan obligations	1,305	1,015
Long-term operating lease liabilities	839	927
Deferred credits and other liabilities	1,213	1,346
Total liabilities	55,919	51,792
Commitments and contingencies (see Note 24)
Redeemable noncontrolling interest	967	965
Equity
Preferred stock, no shares issued and outstanding (par value $0.01 per share, 30 million shares authorized)	0	0
Common stock:
Issued – 989 million and 984 million shares (par value $0.01 per share, 2 billion shares authorized)	10	10
Held in treasury, at cost – 520 million and 405 million shares	(30,065)	(19,904)
Additional paid-in capital	33,363	33,262
Retained earnings	23,175	12,905
Accumulated other comprehensive loss	(179)	(67)
Total MPC stockholders’ equity	26,304	26,206
Noncontrolling interests	6,504	6,410
Total equity	32,808	32,616
Total liabilities, redeemable noncontrolling interest and equity	$ 89,694	$ 85,373

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Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Millions, $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Accounts Receivable, Allowance for Credit Loss, Current	$ 39	$ 40
Preferred stock:
Preferred Stock, Shares Issued	0
Preferred Stock, Shares Outstanding	0
Preferred Stock, Par or Stated Value Per Share	$ 0.01
Preferred Stock, Shares Authorized	30
Common stock:
Common Stock, Shares, Issued	989	984
Common Stock, Par or Stated Value Per Share	$ 0.01
Common Stock, Shares Authorized	2,000
Treasury Stock, Shares	(520)	(405)

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Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022		Sep. 30, 2021
Operating activities:
Net income	$ 12,409		$ 9,896
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of deferred financing costs and debt discount	45		59
Depreciation and amortization	2,418		2,551	[1]
Pension and other postretirement benefits, net	135		(535)
Deferred income taxes	38		(175)
Net gain on disposal of assets	(1,072)		(3)
Income from equity method investments	(469)		(306)
Distributions from equity method investments	544		466
Income from discontinued operations	0		(8,448)
Changes in income tax receivable	(142)		535
Changes in the fair value of derivative instruments	(148)		(11)
Changes in:
Current receivables	(2,371)		(3,765)
Inventories	(1,795)		(1,206)
Current accounts payable and accrued liabilities	3,045		4,670
Right of use assets and operating lease liabilities, net	1		5
All other, net	(615)		(187)
Cash provided by operating activities - continuing operations	12,023		3,546
Cash used in operating activities - discontinued operations	(44)		(2,860)
Net cash provided by operating activities	11,979		686
Investing activities:
Additions to property, plant and equipment	(1,694)		(983)
Acquisitions, net of cash acquired	(74)		0
Disposal of assets	79		98
Investments – acquisitions and contributions	(215)		(150)
Investments - redemptions, repayments and return of capital	511		39
Purchases of short-term investments	(3,735)		(9,457)
Sales of short-term investments	1,140		455
Maturities of short-term investments	4,396		1,652
All other, net	713		381
Cash provided by (used in) investing activities - continuing operations	1,121		(7,965)
Cash provided by investing activities - discontinued operations	0		21,314
Net cash provided by investing activities	1,121		13,349
Financing activities:
Commercial paper – issued	0		7,414
Commercial paper - repayments	0		(8,437)
Long-term debt – borrowings	3,379		10,975
Long-term debt – repayments	(2,258)		(14,274)
Debt issuance costs	(39)		0
Issuance of common stock	184		71
Common stock repurchased	(10,085)		(1,912)
Dividends paid	(928)		(1,130)
Distributions to noncontrolling interests	(908)		(923)
Repurchases of noncontrolling interests	(315)		(465)
All other, net	(41)		(35)
Net cash used in financing activities	(11,011)		(8,716)
Net change in cash, cash equivalents and restricted cash	2,089		5,319
Cash, cash equivalents, restricted cash and restricted cash equivalents, beginning balance	5,294	[2]	416
Cash, cash equivalents, restricted cash, and restricted cash equivalents, discontinued operations, beginning balance	0		140
Cash, cash equivalents, restricted cash, and restricted cash equivalents, discontinued operations, ending balance	0		0
Cash, cash equivalents, restricted cash and restricted cash equivalents, ending balance	$ 7,383	[2]	$ 5,875

[1] The three and nine months ended September 30, 2021 includes $13 million and $56 million, respectively, of impairments of long lived assets.

[2] Restricted cash is included in other current assets on our consolidated balance sheets.

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Consolidated Statements of Equity and Redeemable Noncontrolling Interest (Consolidated Statements of Equity) - USD ($) $ in Millions	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Non-controlling Interests
Beginning balance at Dec. 31, 2020	$ 29,252	$ 10	$ (15,157)	$ 33,208	$ 4,650	$ (512)	$ 7,053
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	44				(242)		286
Dividends declared on common stock	(379)				(379)
Distributions to noncontrolling interests	(300)						(300)
Other comprehensive income (loss)	1					1
Shares returned - stock based compensation			(1)
Shares issued - stock based compensation				18
Net shares issued - stock based compensation	17						0
Equity transactions of MPLX	(124)			(4)			(120)
Ending balance at Mar. 31, 2021	28,511	10	(15,158)	33,222	4,029	(511)	6,919
Beginning balance at Dec. 31, 2020	29,252	10	(15,157)	33,208	4,650	(512)	7,053
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)	168
Equity transactions of MPLX				(52)
Ending balance at Sep. 30, 2021	34,978	10	(17,126)	33,256	12,484	(344)	6,698
Beginning balance at Mar. 31, 2021	28,511	10	(15,158)	33,222	4,029	(511)	6,919
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	8,781				8,512		269
Dividends declared on common stock	(381)				(381)
Distributions to noncontrolling interests	(272)						(272)
Other comprehensive income (loss)	171					171
Shares repurchased	(984)		(984)
Shares returned - stock based compensation			(5)
Shares issued - stock based compensation				50
Net shares issued - stock based compensation	47						2
Equity transactions of MPLX	(148)			(34)			(114)
Ending balance at Jun. 30, 2021	35,725	10	(16,147)	33,238	12,160	(340)	6,804
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	992				694		298
Dividends declared on common stock	(370)				(370)
Distributions to noncontrolling interests	(290)						(290)
Other comprehensive income (loss)	(4)					(4)
Shares repurchased	(978)		(978)
Shares returned - stock based compensation			(1)
Shares issued - stock based compensation				32
Net shares issued - stock based compensation	33						2
Equity transactions of MPLX	(130)			(14)			(116)
Ending balance at Sep. 30, 2021	34,978	10	(17,126)	33,256	12,484	(344)	6,698
Beginning balance at Dec. 31, 2021	32,616	10	(19,904)	33,262	12,905	(67)	6,410
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,151				845		306
Dividends declared on common stock	(330)				(330)
Distributions to noncontrolling interests	(290)						(290)
Other comprehensive income (loss)	(7)					(7)
Shares repurchased	(2,807)		(2,807)
Shares returned - stock based compensation			0
Shares issued - stock based compensation				90
Net shares issued - stock based compensation	89						(1)
Equity transactions of MPLX	(88)			(25)			(63)
Ending balance at Mar. 31, 2022	30,334	10	(22,711)	33,327	13,420	(74)	6,362
Beginning balance at Dec. 31, 2021	32,616	10	(19,904)	33,262	12,905	(67)	6,410
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)	(112)
Equity transactions of MPLX				(89)
Ending balance at Sep. 30, 2022	32,808	10	(30,065)	33,363	23,175	(179)	6,504
Beginning balance at Mar. 31, 2022	30,334	10	(22,711)	33,327	13,420	(74)	6,362
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	6,196				5,873		323
Dividends declared on common stock	(310)				(310)
Distributions to noncontrolling interests	(267)						(267)
Other comprehensive income (loss)	9					9
Shares repurchased	(3,285)		(3,285)
Shares returned - stock based compensation			(4)
Shares issued - stock based compensation				71
Net shares issued - stock based compensation	69						2
Equity transactions of MPLX	(42)			(20)			(22)
Ending balance at Jun. 30, 2022	32,704	10	(26,000)	33,378	18,983	(65)	6,398
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	4,997				4,477		520
Dividends declared on common stock	(285)				(285)
Distributions to noncontrolling interests	(288)						(288)
Other comprehensive income (loss)	(114)					(114)
Shares repurchased	(4,065)		(4,065)
Shares returned - stock based compensation			0
Shares issued - stock based compensation				29
Net shares issued - stock based compensation	32						3
Equity transactions of MPLX	(173)			(44)			(129)
Ending balance at Sep. 30, 2022	$ 32,808	$ 10	$ (30,065)	$ 33,363	$ 23,175	$ (179)	$ 6,504

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Consolidated Statements of Equity and Redeemable Noncontrolling Interest (Shares of Common Stock) - shares shares in Millions	Total	Common Stock
Beginning balance at Dec. 31, 2020		980
Number of common shares issued - stock compensation		1
Ending balance at Mar. 31, 2021		981
Number of common shares issued - stock compensation		2
Ending balance at Jun. 30, 2021		983
Number of common shares issued - stock compensation		0
Ending balance at Sep. 30, 2021		983
Beginning balance at Dec. 31, 2021	984	984
Number of common shares issued - stock compensation		3
Ending balance at Mar. 31, 2022		987
Number of common shares issued - stock compensation		2
Ending balance at Jun. 30, 2022		989
Number of common shares issued - stock compensation		0
Ending balance at Sep. 30, 2022	989	989

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Consolidated Statements of Equity and Redeemable Noncontrolling Interest (Shares of Treasury Stock) - shares shares in Millions	Total	Treasury Stock
Beginning balance at Dec. 31, 2020		(329)
Number of shares returned - stock compensation		0
Ending balance at Mar. 31, 2021		(329)
Beginning balance at Dec. 31, 2020		(329)
Number of shares repurchased	(32)
Ending balance at Sep. 30, 2021		(361)
Beginning balance at Mar. 31, 2021		(329)
Number of shares repurchased		(16)
Number of shares returned - stock compensation		0
Ending balance at Jun. 30, 2021		(345)
Number of shares repurchased	(16)	(16)
Number of shares returned - stock compensation		0
Ending balance at Sep. 30, 2021		(361)
Beginning balance at Dec. 31, 2021	(405)	(405)
Number of shares repurchased		(37)
Number of shares returned - stock compensation		0
Ending balance at Mar. 31, 2022		(442)
Beginning balance at Dec. 31, 2021	(405)	(405)
Number of shares repurchased	(115)
Ending balance at Sep. 30, 2022	(520)	(520)
Beginning balance at Mar. 31, 2022		(442)
Number of shares repurchased		(34)
Number of shares returned - stock compensation		0
Ending balance at Jun. 30, 2022		(476)
Number of shares repurchased	(44)	(44)
Number of shares returned - stock compensation		0
Ending balance at Sep. 30, 2022	(520)	(520)

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Consolidated Statements of Equity and Redeemable Noncontrolling Interest (Redeemable Noncontrolling Interest) - USD ($) $ in Millions	Total	Redeemable Non-controlling Interest
Beginning balance at Dec. 31, 2020		$ 968
Net income attributable to redeemable noncontrolling interest		20
Distributions to noncontrolling interests		(20)
Ending balance at Mar. 31, 2021		968
Beginning balance at Dec. 31, 2020		968
Net income attributable to redeemable noncontrolling interest	$ 79
Ending balance at Sep. 30, 2021		986
Beginning balance at Mar. 31, 2021		968
Net income attributable to redeemable noncontrolling interest		21
Distributions to noncontrolling interests		(21)
Ending balance at Jun. 30, 2021		968
Net income attributable to redeemable noncontrolling interest	38	38
Distributions to noncontrolling interests		(20)
Ending balance at Sep. 30, 2021		986
Beginning balance at Dec. 31, 2021	965	965
Net income attributable to redeemable noncontrolling interest		21
Distributions to noncontrolling interests		(21)
Ending balance at Mar. 31, 2022		965
Beginning balance at Dec. 31, 2021	965	965
Net income attributable to redeemable noncontrolling interest	65
Ending balance at Sep. 30, 2022	967	967
Beginning balance at Mar. 31, 2022		965
Net income attributable to redeemable noncontrolling interest		21
Distributions to noncontrolling interests		(21)
Ending balance at Jun. 30, 2022		965
Net income attributable to redeemable noncontrolling interest	23	23
Distributions to noncontrolling interests		(21)
Ending balance at Sep. 30, 2022	$ 967	$ 967

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Consolidated Statements of Equity and Redeemable Noncontrolling Interest (Parenthetical) - $ / shares	3 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021
Statement of Stockholders' Equity [Abstract]
Dividends declared per share of common stock (in dollars per share)	$ 0.58	$ 0.58	$ 0.58	$ 0.58	$ 0.58	$ 0.58

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Description of the Business and Basis of Presentation

9 Months Ended

Sep. 30, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Description of the Business and Basis of Presentation

Description of the Business and Basis of Presentation

Description of the Business

We are a leading, integrated, downstream energy company headquartered in Findlay, Ohio. We operate the nation's largest refining system. We sell refined products to wholesale marketing customers domestically and internationally, to buyers on the spot market and to independent entrepreneurs who operate branded outlets. We also sell transportation fuel to consumers through direct dealer locations under long-term supply contracts. MPC’s midstream operations are primarily conducted through MPLX LP (“MPLX”), which owns and operates crude oil and light product transportation and logistics infrastructure as well as gathering, processing and fractionation assets. We own the general partner and a majority limited partner interest in MPLX. See Note 5.

Basis of Presentation

All significant intercompany transactions and accounts have been eliminated.

These interim consolidated financial statements are unaudited; however, in the opinion of our management, these statements reflect all adjustments necessary for a fair statement of the results for the periods reported. All such adjustments are of a normal, recurring nature unless otherwise disclosed. These interim consolidated financial statements, including the notes, have been prepared in accordance with the rules of the SEC applicable to interim period financial statements and do not include all of the information and disclosures required by GAAP for complete financial statements. Certain information and disclosures derived from our audited annual financial statements, prepared in accordance with GAAP, have been condensed or omitted from these interim financial statements.

These interim consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2021. The results of operations for the three and nine months ended September 30, 2022 are not necessarily indicative of the results to be expected for the full year.

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Accounting Standards

9 Months Ended

Sep. 30, 2022

Accounting Standards Update and Change in Accounting Principle [Abstract]

Accounting Standards

Accounting Standards

Recently Adopted

ASU 2021-10, Government Assistance (Topic 832): Disclosures by Business Entities about Government Assistance

In November 2021, the FASB issued guidance requiring disclosures for certain types of government assistance that have been accounted for by analogy to grant or contribution models. Disclosures will include information about the type of transactions, accounting and the impact on financial statements. We prospectively adopted this standard in the first quarter of 2022. The adoption of this standard did not have a material impact on our financial statements or disclosures.

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Short-term Investments

9 Months Ended

Sep. 30, 2022

Investments, Debt and Equity Securities [Abstract]

Short-term Investments

Short-Term Investments

Investments Components

The components of investments were as follows:

	September 30, 2022
(Millions of dollars)	Fair Value Level	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value		Cash and Cash Equivalents		Short-term Investments
Available-for-sale debt securities
Commercial paper	Level 2	$	2,860	$	—	$	(3)	$	2,857	$	604	$	2,253
Certificates of deposit and time deposits	Level 2	3,542		—		(2)		3,540		2,200		1,340
U.S. government securities	Level 1	566		—		—		566		416		150
Corporate notes and bonds	Level 2	16		—		—		16		—		16
Total available-for-sale debt securities		$	6,984	$	—	$	(5)	$	6,979	$	3,220	$	3,759
Cash								4,156		4,156		—
Total								$	11,135	$	7,376	$	3,759

	December 31, 2021
(Millions of dollars)	Fair Value Level	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value		Cash and Cash Equivalents		Short-term Investments
Available-for-sale debt securities
Commercial paper	Level 2	$	4,905	$	—	$	(1)	$	4,904	$	868	$	4,036
Certificates of deposit and time deposits	Level 2	2,024		—		—		2,024		750		1,274
U.S. government securities	Level 1	28		—		—		28		—		28
Corporate notes and bonds	Level 2	271		—		—		271		61		210
Total available-for-sale debt securities		$	7,228	$	—	$	(1)	$	7,227	$	1,679	$	5,548
Cash								3,612		3,612		—
Total								$	10,839	$	5,291	$	5,548

Our investment policy includes concentration limits and credit rating requirements which limits our investments to high quality, short term and highly liquid securities.

Unrealized losses on debt investments held from May 14, 2021, which coincides with the sale of Speedway, to September 30, 2022 were not material. Realized gains/losses were not material. All of our available-for-sale debt securities held as of September 30, 2022 mature within one year or less or are readily available for use.

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Discontinued Operations

9 Months Ended

Sep. 30, 2022

Discontinued Operations and Disposal Groups [Abstract]

Discontinued Operations

Discontinued Operations

On May 14, 2021, we completed the sale of Speedway, our company-owned and operated retail transportation fuel and convenience store business, to 7-Eleven for cash proceeds of approximately $21.38 billion. After-tax proceeds were approximately $17.22 billion. This transaction resulted in a pretax gain of $11.68 billion ($8.02 billion after income taxes) after deducting the book value of the net assets and certain other adjustments.

The proceeds and related Speedway sale gain may be adjusted in future periods based on provisions of the purchase and sale agreement that allow for adjustments of working capital amounts and other miscellaneous items subsequent to the transaction closing date of May 14, 2021.

Results of operations for Speedway are reflected through the close of the sale. The following table presents Speedway results and the gain on sale as reported in income from discontinued operations, net of tax, within our consolidated statements of income.

	Three Months Ended		Nine Months Ended
(Millions of dollars)	September 30, 2021
Revenues, other income and net gain on disposal of assets:
Revenues and other income	$	—	$	8,420
Net gain on disposal of assets	—		11,682
Total revenues, other income and net gain on disposal of assets	—		20,102
Costs and expenses:
Cost of revenues (excludes items below)	—		7,654
Depreciation and amortization	—		3
Selling, general and administrative expenses	—		121
Other taxes	—		75
Total costs and expenses	—		7,853
Income from operations	—		12,249
Net interest and other financial costs	—		6
Income before income taxes	—		12,243
Provision for income taxes	—		3,795
Income from discontinued operations, net of tax	$	—	$	8,448

Fuel Supply AgreementsDuring the second quarter of 2021, we entered into various 15-year fuel supply agreements through which we continue to supply fuel to Speedway.

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Master Limited Partnership

9 Months Ended

Sep. 30, 2022

Noncontrolling Interest [Abstract]

Master Limited Partnership

Master Limited Partnership

We own the general partner and a majority limited partner interest in MPLX, which owns and operates crude oil and light product transportation and logistics infrastructure as well as gathering, processing and fractionation assets. We control MPLX through our ownership of the general partner interest. As of September 30, 2022, we owned approximately 64 percent of the outstanding MPLX common units.

Unit Repurchase Program

On November 2, 2020, MPLX announced the board authorization of a unit repurchase program for the repurchase of up to $1.0 billion of MPLX’s outstanding common units held by the public. On August 2, 2022, MPLX announced its board of directors approved an incremental $1.0 billion unit repurchase authorization. The unit repurchase authorizations have no expiration date. MPLX may utilize various methods to effect the repurchases, which could include open market repurchases, negotiated block transactions, accelerated unit repurchases, tender offers or open market solicitations for units, some of which may be effected through Rule 10b5-1 plans. The timing of repurchases will depend upon several factors, including market and business conditions, and repurchases may be discontinued at any time.

Total unit repurchases were as follows for the respective periods:

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(In millions, except per share data)	2022		2021		2022		2021
Number of common units repurchased	6		6		10		18
Cash paid for common units repurchased	$	180	$	155	$	315	$	465
Average cost per unit	$	31.65	$	28.41	$	31.98	$	26.79

As of September 30, 2022, MPLX had approximately $1.0 billion remaining under its unit repurchase authorizations, which reflects the repurchase of 532,326 common units for $16 million that were transacted in the third quarter of 2022 and settled in the fourth quarter of 2022.

Agreements

We have various long-term, fee-based commercial agreements with MPLX. Under these agreements, MPLX provides transportation, storage, distribution and marketing services to us. With certain exceptions, these agreements generally contain minimum volume commitments. These transactions are eliminated in consolidation but are reflected as intersegment transactions between our Refining & Marketing and Midstream segments. We also have agreements with MPLX that 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 but are reflected as intersegment transactions between our Corporate and Midstream segments.

Noncontrolling Interest

As a result of equity transactions of MPLX, we are required to adjust non-controlling interest and additional paid-in capital. Changes in MPC’s additional paid-in capital resulting from changes in its ownership interests in MPLX were as follows:

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(Millions of dollars)	2022		2021		2022		2021
Decrease due to change in ownership	$	(67)	$	(44)	$	(117)	$	(120)
Tax impact	23		30		28		68
Decrease in MPC's additional paid-in capital, net of tax	$	(44)	$	(14)	$	(89)	$	(52)

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Variable Interest Entities

9 Months Ended

Sep. 30, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Variable Interest Entities

Variable Interest Entities

Consolidated VIE

We control MPLX through our ownership of its general partner. MPLX is a VIE because the limited partners do not have substantive kick-out or 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 ability, through our 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 interest owned by the public. We also record a redeemable noncontrolling interest related to MPLX’s Series A preferred units.

The creditors of MPLX do not have recourse to MPC’s general credit through guarantees or other financial arrangements, except as noted. MPC has effectively guaranteed certain indebtedness of LOOP LLC (“LOOP”) and LOCAP LLC (“LOCAP”), in which MPLX holds an interest. See Note 24 for more information. The assets of MPLX can only be used to settle its own obligations and its creditors have no recourse to our assets, except as noted earlier.

The following table presents balance sheet information for the assets and liabilities of MPLX, which are included in our balance sheets.

(Millions of dollars)	September 30, 2022		December 31, 2021
Assets
Cash and cash equivalents	$	121	$	13
Receivables, less allowance for doubtful accounts	950		660
Inventories	151		142
Other current assets	43		55
Equity method investments	4,108		3,981
Property, plant and equipment, net	18,910		20,042
Goodwill	7,645		7,657
Right of use assets	288		268
Other noncurrent assets	1,689		891
Liabilities
Accounts payable	$	744	$	671
Payroll and benefits payable	4		6
Accrued taxes	102		75
Debt due within one year	982		499
Operating lease liabilities	44		59
Other current liabilities	308		304
Long-term debt	18,797		18,072
Deferred income taxes	14		10
Long-term operating lease liabilities	241		205
Deferred credits and other liabilities	306		559

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Related Party Transactions

9 Months Ended

Sep. 30, 2022

Related Party Transactions [Abstract]

Related Party Transactions

Related Party Transactions

Transactions with related parties were as follows:

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(Millions of dollars)	2022		2021		2022		2021
Sales to related parties	$	16	$	13	$	56	$	67
Purchases from related parties	315		251		894		673

Sales to related parties, which are included in sales and other operating revenues, consist primarily of refined product sales to certain of our equity affiliates.

Purchases from related parties are included in cost of revenues. We obtain utilities, transportation services and purchase ethanol from certain of our equity affiliates.

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Earnings Per Share

9 Months Ended

Sep. 30, 2022

Earnings Per Share [Abstract]

Earnings (Loss) per Share

Earnings Per Share

We compute basic earnings per share by dividing net income attributable to MPC less income allocated to participating securities by the weighted average number of shares of common stock outstanding. Since MPC grants certain incentive compensation awards to employees and non-employee directors that are considered to be participating securities, we have calculated our earnings per share using the two-class method. Diluted income per share assumes exercise of certain stock-based compensation awards, provided the effect is not anti-dilutive.

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(In millions, except per share data)	2022		2021		2022		2021
Income from continuing operations, net of tax	$	5,020	$	1,030	$	12,409	$	1,448
Less: Net income attributable to noncontrolling interest	543		336		1,214		932
Net income allocated to participating securities	2		—		6		1
Income from continuing operations available to common stockholders	4,475		694		11,189		515
Income from discontinued operations, net of tax	—		—		—		8,448
Income available to common stockholders	$	4,475	$	694	$	11,189	$	8,963
Weighted average common shares outstanding:
Basic	491		633		528		645
Effect of dilutive securities	3		4		4		4
Diluted	494		637		532		649
Income available to common stockholders per share:
Basic:
Continuing operations	$	9.12	$	1.10	$	21.18	$	0.80
Discontinued operations	—		—		—		13.10
Net income per share	$	9.12	$	1.10	$	21.18	$	13.90
Diluted:
Continuing operations	$	9.06	$	1.09	$	21.04	$	0.79
Discontinued operations	—		—		—		13.02
Net income per share	$	9.06	$	1.09	$	21.04	$	13.81

The following table summarizes the shares that were anti-dilutive and, therefore, were excluded from the diluted share calculation.

	Three Months Ended  September 30,		Nine Months Ended  September 30,
(In millions)	2022	2021	2022	2021
Shares issuable under stock-based compensation plans	—	3	—	3

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Equity

9 Months Ended

Sep. 30, 2022

Equity [Abstract]

Equity

Equity

On August 2, 2022, we announced our board of directors approved an incremental $5.0 billion share repurchase authorization bringing total share repurchase authorizations announced in 2022 to $10.0 billion. The authorizations have no expiration date.

We may utilize various methods to effect the repurchases, which could include open market repurchases, negotiated block transactions, tender offers, accelerated share repurchases or open market solicitations for shares, some of which may be effected 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 suspended or discontinued at any time.

Total share repurchases were as follows for the respective periods:

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(In millions, except per share data)	2022		2021		2022		2021
Number of shares repurchased	44		16		115		32
Cash paid for shares repurchased	$	3,908	$	928	$	10,085	$	1,912
Average cost per share	$	92.54	$	58.78	$	88.07	$	60.91

As of September 30, 2022, MPC had $5.11 billion remaining under its share repurchase authorizations, which reflects the repurchase of 1,577,829 common shares for $157 million that were transacted in the third quarter of 2022 and settled in the fourth quarter of 2022.

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Segment Information

9 Months Ended

Sep. 30, 2022

Segment Reporting [Abstract]

Segment Information

Segment Information

We have two reportable segments: Refining & Marketing and Midstream. Each of these segments is organized and managed based upon the nature of the products and services it offers.

•Refining & Marketing – refines crude oil and other feedstocks, including renewable feedstocks, at our refineries in the Gulf Coast, Mid-Continent and West Coast regions of the United States, purchases refined products and ethanol for resale and distributes refined products, including renewable diesel, through transportation, storage, distribution and marketing services provided largely by our Midstream segment. We sell refined products to wholesale marketing customers domestically and internationally, to buyers on the spot market, to independent entrepreneurs who operate primarily Marathon® branded outlets and through long-term fuel supply contracts with direct dealers who operate locations mainly under the ARCO® brand.

•Midstream – transports, stores, distributes and markets crude oil and refined products principally for the Refining & Marketing segment via refining logistics assets, pipelines, terminals, towboats and barges; gathers, processes and transports natural gas; and gathers, transports, fractionates, stores and markets NGLs. The Midstream segment primarily reflects the results of MPLX.

During the first quarter of 2022, our chief operating decision maker (“CODM”) began to evaluate the performance of our segments using segment adjusted EBITDA. We have modified our presentation of segment performance to be consistent with this change, including prior periods presented for consistent and comparable presentation. Amounts included in income from continuing operations before income taxes and excluded from segment adjusted EBITDA include: (i) depreciation and amortization; (ii) net interest and other financial costs; (iii) turnaround expenses and (iv) other adjustments as deemed necessary. These items are either: (i) believed to be non-recurring in nature; (ii) not believed to be allocable or controlled by the segment; or (iii) are not tied to the operational performance of the segment. Assets by segment are not a measure used to assess the performance of the company by the CODM and thus are not reported in our disclosures.

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(Millions of dollars)	2022		2021		2022		2021
Segment adjusted EBITDA for reportable segments
Refining & Marketing	$	5,496	$	1,195	$	14,630	$	1,969
Midstream	1,498		1,375		4,357		4,005
Total reportable segments	$	6,994	$	2,570	$	18,987	$	5,974
Reconciliation of segment adjusted EBITDA for reportable segments to income from continuing operations before income taxes
Total reportable segments	$	6,994	$	2,570	$	18,987	$	5,974
Corporate	(160)		(154)		(454)		(428)
Refining planned turnaround costs	(384)		(205)		(680)		(378)
Storm impacts	—		(23)		—		(70)
LIFO inventory charge	(28)		—		(28)		—
Gain on sale of assets(a)	1,058		—		1,058		—
Renewable volume obligation requirements	—		—		238		—
Litigation	—		—		27		—
Impairments(b)	—		—		—		(13)
Idling expenses	—		(12)		—		(12)
Depreciation and amortization(c)	(794)		(836)		(2,418)		(2,551)
Net interest and other financial costs	(240)		(328)		(814)		(1,053)
Income from continuing operations before income taxes	$	6,446	$	1,012	$	15,916	$	1,469

(a)    Includes the non-cash gain related to the contribution of assets by MPC on the formation of the Martinez Renewable joint venture and the non-cash gain on lease reclassification. See Note 14 and 23 for additional information.

(b)    Impairment of equity method investments.

(c)    The three and nine months ended September 30, 2021 includes $13 million and $56 million, respectively, of impairments of long lived assets.

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(Millions of dollars)	2022		2021		2022		2021
Sales and other operating revenues
Refining & Marketing
Revenues from external customers(a)	$	44,355	$	31,109	$	133,447	$	81,324
Intersegment revenues	13		37		96		95
Refining & Marketing segment revenues	44,368		31,146		133,543		81,419
Midstream
Revenues from external customers(a)	1,432		1,212		4,193		3,323
Intersegment revenues	1,326		1,242		3,881		3,689
Midstream segment revenues	2,758		2,454		8,074		7,012
Total segment revenues	47,126		33,600		141,617		88,431
Less: intersegment revenues	1,339		1,279		3,977		3,784
Consolidated sales and other operating revenues(a)	$	45,787	$	32,321	$	137,640	$	84,647

(a)Includes related party sales. See Note 7 for additional information.

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(Millions of dollars)	2022		2021		2022		2021
Income (loss) from equity method investments
Refining & Marketing	$	21	$	8	$	39	$	27
Midstream	159		114		430		292
Corporate(a)	—		—		—		(13)
Consolidated income from equity method investments	$	180	$	122	$	469	$	306
Depreciation and amortization
Refining & Marketing	$	459	$	462	$	1,395	$	1,406
Midstream	322		329		983		994
Corporate	13		45		40		151
Consolidated depreciation and amortization	$	794	$	836	$	2,418	$	2,551
Capital expenditures
Refining & Marketing	$	445	$	228	$	1,004	$	538
Midstream	267		190		772		506
Segment capital expenditures and investments	712		418		1,776		1,044
Less investments in equity method investees	55		37		215		150
Plus:
Corporate	49		28		87		72
Capitalized interest	28		18		76		48
Consolidated capital expenditures(b)	$	734	$	427	$	1,724	$	1,014

(a)Impairment of equity method investment.

(b)Includes changes in capital expenditure accruals. See Note 20 for a reconciliation of total capital expenditures to additions to property, plant and equipment for the nine months ended September 30, 2022 and 2021 as reported in the consolidated statements of cash flows.

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Net Interest and Other Financial Costs

9 Months Ended

Sep. 30, 2022

Other Income and Expenses [Abstract]

Net Interest and Other Financial Costs

Net Interest and Other Financial Costs

Net interest and other financial costs were as follows:

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(Millions of dollars)	2022		2021		2022		2021
Interest income	$	(59)	$	(5)	$	(82)	$	(8)
Interest expense	332		331		966		1,019
Interest capitalized	(29)		(18)		(77)		(54)
Pension and other postretirement non-service costs(a)	(7)		10		4		66
Other financial costs	3		10		3		30
Net interest and other financial costs	$	240	$	328	$	814	$	1,053

(a)See Note 22.

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Income Taxes

9 Months Ended

Sep. 30, 2022

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

We recorded a combined federal, state and foreign income tax provision of $1.426 billion and $3.507 billion for the three and nine months ended September 30, 2022, respectively, which was higher than the tax computed at the U.S. statutory rate primarily due to state taxes offset by permanent tax benefits related to net income attributable to noncontrolling interests.

We recorded a combined federal, state and foreign income tax (benefit) provision of $(18) million and $21 million for the three and nine months ended September 30, 2021, respectively, which was lower than the tax computed at the U.S. statutory rate primarily due to certain permanent tax benefits related to net income attributable to noncontrolling interests.

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Inventories

9 Months Ended

Sep. 30, 2022

Inventory Disclosure [Abstract]

Inventories

Inventories

(Millions of dollars)	September 30, 2022		December 31, 2021
Crude oil	$	3,565	$	2,639
Refined products	5,188		4,460
Materials and supplies	1,081		956
Total	$	9,834	$	8,055

Inventories are carried at the lower of cost or market value. Costs of crude oil and refined products are aggregated on a consolidated basis for purposes of assessing whether the LIFO cost basis of these inventories may have to be written down to market values.

The cost of inventories of crude oil and refined products is determined primarily under the LIFO method. During the three and nine month periods ended September 30, 2022, we recorded a $28 million charge to reflect a LIFO increment of our crude oil and refined products inventories. The cost of inventory in these LIFO layers was valued based on the purchase price determined in the first quarter of 2022, which is lower than current crude cost, resulting in the charge to cost of revenues.

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Equity Method Investments

9 Months Ended

Sep. 30, 2022

Equity Method Investments and Joint Ventures [Abstract]

Equity Method Investments

Equity Method Investments

Martinez Renewables LLC

On September 21, 2022, MPC closed on the formation of the Martinez Renewable joint venture. MPC contributed property, plant and equipment, inventory, and working capital with an estimated fair value of $1.471 billion and Neste contributed $728 million in cash. MPC recorded a gain of $549 million resulting from the difference between the carrying value and fair value of the contributed property, plant and equipment and inventory. Subsequent to the closing, the joint venture paid a special distribution to MPC of $500 million, which is reflected as a return of capital in MPC’s consolidated statements of cash flows. After the special distribution, MPC’s investment value in the entity is approximately $971 million.

MPC determined that, as of the closing date, Martinez Renewables LLC is a VIE because the entity does not have sufficient equity to complete the modification of the plant to produce renewable fuels without additional financial support from its owners. We are not the primary beneficiary of this VIE because we do not have the ability to control the activities that significantly influence the economic outcomes of the entity and, therefore, apply the equity method of accounting with the respect to our investment in the entity.

Watson Cogeneration Company

On June 1, 2022, MPC purchased the remaining 49 percent interest in Watson Cogeneration Company from NRG Energy, Inc. for approximately $59 million. This entity is now consolidated and included in our consolidated results. It was previously accounted for as an equity method investment.

The excess of the $62 million fair value over the $25 million book value of our 51 percent ownership interest in Watson Cogeneration Company resulted in a $37 million non-cash gain, which is included in the net gain on disposal of assets line of the accompanying consolidated statements of income.

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Property, Plant and Equipment

9 Months Ended

Sep. 30, 2022

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, Plant and Equipment

	September 30, 2022						December 31, 2021
(Millions of dollars)	Gross PP&E		Accumulated Depreciation		Net PP&E		Gross PP&E		Accumulated Depreciation		Net PP&E
Refining & Marketing	$	31,571	$	16,345	$	15,226	$	31,089	$	14,876	$	16,213
Midstream	27,464		7,868		19,596		28,098		7,384		20,714
Corporate	1,539		977		562		1,446		933		513
Total	$	60,574	$	25,190	$	35,384	$	60,633	$	23,193	$	37,440

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Fair Value Measurements

9 Months Ended

Sep. 30, 2022

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 September 30, 2022 and December 31, 2021 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.

	September 30, 2022
	Fair Value Hierarchy
(Millions of dollars)	Level 1		Level 2		Level 3		Netting and Collateral(a)		Net Carrying Value on Balance Sheet(b)		Collateral Pledged Not Offset
Assets:
Commodity contracts	$	1,044	$	—	$	—	$	(931)	$	113	$	41
Liabilities:
Commodity contracts	$	931	$	—	$	—	$	(931)	$	—	$	—
Embedded derivatives in commodity contracts	—		—		46		—		46		—

	December 31, 2021
	Fair Value Hierarchy
(Millions of dollars)	Level 1		Level 2		Level 3		Netting and Collateral(a)		Net Carrying Value on Balance Sheet(b)		Collateral Pledged Not Offset
Assets:
Commodity contracts	$	270	$	1	$	—	$	(235)	$	36	$	34
Liabilities:
Commodity contracts	$	248	$	1	$	—	$	(249)	$	—	$	—
Embedded derivatives in commodity contracts	—		—		108		—		108		—

(a)Represents the impact of netting assets, liabilities and cash collateral when a legal right of offset exists. As of September 30, 2022, no cash collateral was netted with mark-to-market derivative liabilities. As of December 31, 2021, cash collateral of $14 million was netted with mark-to-market derivative liabilities.

(b)We have no derivative contracts that are covered by master netting arrangements reflected gross on the balance sheet.

Level 3 instruments relate to an embedded derivative liability for a natural gas purchase commitment embedded in a keep‑whole processing agreement. The fair value calculation for these Level 3 instruments at September 30, 2022 used significant unobservable inputs including: (1) NGL prices interpolated and extrapolated due to inactive markets ranging from $0.51 to $1.56 per gallon with a weighted average of $0.75 per gallon and (2) the probability of renewal of 100 percent for the five-year term of the natural gas purchase commitment and related keep-whole processing agreement. Increases or decreases in the fractionation spread result in an increase or decrease in the fair value of the embedded derivative liability.

The following is a reconciliation of the beginning and ending balances recorded for net liabilities classified as Level 3 in the fair value hierarchy.

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(Millions of dollars)	2022		2021		2022		2021
Beginning balance	$	92	$	102	$	108	$	63
Unrealized and realized (gain)/loss included in net income	(44)		7		(52)		52
Settlements of derivative instruments	(2)		(5)		(10)		(11)
Ending balance	$	46	$	104	$	46	$	104
The amount of total (gain)/loss for the period included in earnings attributable to the change in unrealized losses relating to liabilities still held at the end of period:	$	(42)	$	6	$	(50)	$	44

Fair Values – Non-recurring

Non-recurring fair value measurements and disclosures relate primarily to sales-type leases discussed in Note 23 and the Martinez Renewables LLC equity method investment discussed in Note 14. The net investment in sales-type leases was recorded at the estimated fair value of the underlying leased assets at contract modification date. The leased assets were valued using a cost method valuation approach which utilizes Level 3 inputs. The fair value of the Martinez Renewables LLC equity method investment was primarily based on the cash consideration received from Neste for their 50 percent ownership.

Fair Values – Reported

We believe the carrying value of our other financial instruments, including cash and cash equivalents, receivables, accounts payable and certain accrued liabilities, approximate fair value. Our fair value assessment incorporates a variety of considerations, including the short-term duration of the instruments and the expected insignificance of bad debt expense, which includes an evaluation of counterparty credit risk. The borrowings under our revolving credit facilities, which include variable interest rates, approximate fair value. The fair value of our long-term debt is based on prices from recent trade activity and is categorized in level 3 of the fair value hierarchy. The carrying and fair values of our debt were approximately $26.3 billion and $23.3 billion at September 30, 2022, respectively, and approximately $25.1 billion and $28.1 billion at December 31, 2021, respectively. These carrying and fair values of our debt exclude the unamortized issuance costs which are netted against our total debt.

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Derivatives

9 Months Ended

Sep. 30, 2022

Derivative Instruments and Hedging Activities Disclosure [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 16. We do not designate any of our commodity derivative instruments as hedges for accounting purposes.

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 soybean oil.

The following table presents the fair value of derivative instruments as of September 30, 2022 and December 31, 2021 and the line items in the balance sheets in which the fair values are reflected. The fair value amounts below are presented on a gross basis and do not reflect the netting of asset and liability positions permitted under the terms of our master netting arrangements including cash collateral on deposit with, or received from, brokers. We offset the recognized fair value amounts for multiple derivative instruments executed with the same counterparty in our financial statements when a legal right of offset exists. As a result, the asset and liability amounts below will not agree with the amounts presented in our consolidated balance sheets.

(Millions of dollars)	September 30, 2022				December 31, 2021
Balance Sheet Location	Asset		Liability		Asset		Liability
Commodity derivatives
Other current assets	$	1,044	$	931	$	271	$	249
Other current liabilities(a)	—		7		—		15
Deferred credits and other liabilities(a)	—		39		—		93

(a)     Includes embedded derivatives.

The table below summarizes open commodity derivative contracts for crude oil, refined products, blending products and soybean oil as of September 30, 2022.

	Percentage of contracts that expire next quarter	Position
(Units in thousands of barrels)		Long	Short
Exchange-traded(a)
Crude oil	77.6%	121,558	124,469
Refined products	87.0%	13,316	14,280
Blending products	80.9%	3,694	8,883
Soybean oil	92.8%	2,957	3,479

(a)    Included in exchange-traded are spread contracts in thousands of barrels: Crude oil - 35,170 long and 31,175 short; Refined products - 778 long and 836 short. There are no spread contracts for blending products or soybean oil.

The following table summarizes the effect of all commodity derivative instruments in our consolidated statements of income: 

	Gain (Loss)
(Millions of dollars)	Three Months Ended  September 30,				Nine Months Ended  September 30,
Income Statement Location	2022		2021		2022		2021
Sales and other operating revenues	$	—	$	(19)	$	—	$	(34)
Cost of revenues	260		(121)		(65)		(354)
Other income	—		—		1		—
Total	$	260	$	(140)	$	(64)	$	(388)

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Debt

9 Months Ended

Sep. 30, 2022

Debt Disclosure [Abstract]

Debt

Debt

Our outstanding borrowings at September 30, 2022 and December 31, 2021 consisted of the following:

(Millions of dollars)	September 30, 2022		December 31, 2021
Marathon Petroleum Corporation:
Senior notes	$	6,449	$	6,449
Notes payable	1		1
Finance lease obligations	543		589
Total	$	6,993	$	7,039
MPLX LP:
Bank revolving credit facility	—		300
Senior notes	20,100		18,600
Finance lease obligations	8		9
Total	$	20,108	$	18,909
Total debt	$	27,101	$	25,948
Unamortized debt issuance costs	(145)		(129)
Unamortized (discount) premium, net	(254)		(280)
Amounts due within one year	(1,064)		(571)
Total long-term debt due after one year	$	25,638	$	24,968

MPLX Senior Notes

On March 14, 2022, MPLX issued $1.5 billion aggregate principal amount of 4.950% senior notes due March 2052 in an underwritten public offering. The net proceeds were used to repay amounts outstanding under the MPC intercompany loan agreement and under the previous MPLX credit agreement.

On August 11, 2022, MPLX issued $1.0 billion aggregate principal amount of 4.950% senior notes due September 2032 in an underwritten public offering. The net proceeds were used to redeem all of the $500 million aggregate principal amount of 3.500% senior notes due December 2022, $14 million of which was issued by Andeavor Logistics LP, and to redeem all of the $500 million aggregate principal amount of 3.375% senior notes due March 2023.

Available Capacity under our Credit Facilities as of September 30, 2022

(Millions of dollars)	Total Capacity		Outstanding Borrowings		Outstanding Letters of Credit		Available Capacity		Weighted Average Interest Rate		Expiration
MPC, excluding MPLX
MPC bank revolving credit facility	$	5,000	$	—	$	1	$	4,999	—	%	July 2027
MPC trade receivables securitization facility(a)	100		—		100		—		—		September 2023
MPLX
MPLX bank revolving credit facility	2,000		—		—		2,000		—	%	July 2027

(a)    The committed borrowing and letter of credit issuance capacity of the trade receivables securitization facility is $100 million. In addition, the facility allows for the issuance of letters of credit in excess of the committed capacity at the discretion of the issuing banks. As of September 30, 2022, letters of credit in the total amount of $1.153 billion were issued and outstanding under the facility to secure contracts awarded by the Department of Energy to purchase crude oil from the Strategic Petroleum Reserve. In July 2022, the trade receivables securitization facility was amended to, among other things, extend its term until September 29, 2023.

MPC Bank Revolving Credit Facility

On July 7, 2022, MPC entered into a new five-year revolving credit agreement (the “MPC Credit Agreement”) to replace its previous $5.0 billion credit facility that was scheduled to expire in October 2023. The new MPC Credit Agreement, among other things, provides for a $5.0 billion unsecured revolving credit facility that matures in July 2027 and letter of credit issuing capacity under the facility of up to $2.2 billion. Letters of credit issuing capacity is included in, not in addition to, the $5.0 billion borrowing capacity. The financial covenants of the MPC Credit Agreement are substantially the same as those contained in the previous credit agreement. Borrowings under the new MPC Credit Agreement bear interest, at MPC’s election, at either the Adjusted Term SOFR or the Alternate Base Rate, both as defined in the MPC Credit Agreement, plus an applicable margin.

MPLX Bank Revolving Credit Facility

On July 7, 2022, MPLX entered into a new five-year revolving credit agreement (the “MPLX Credit Agreement”) to replace its previous $3.5 billion credit facility that was scheduled to expire in July 2024. The new MPLX Credit Agreement, among other things, provides for a $2.0 billion unsecured revolving credit facility that matures in July 2027 and letter of credit issuing capacity under the facility of up to $150 million. Letters of credit issuing capacity is included in, not in addition to, the $2.0 billion borrowing capacity. The financial covenants of the MPLX Credit Agreement are substantially the same as those contained in the previous credit agreement. Borrowings under the new MPLX Credit Agreement bear interest, at MPLX’s election, at either the Adjusted Term SOFR or the Alternate Base Rate, both as defined in the MPLX Credit Agreement, plus an applicable margin.

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Revenue

9 Months Ended

Sep. 30, 2022

Revenue from Contract with Customer [Abstract]

Revenue

Revenue

The following table presents our revenues from external customers disaggregated by segment and product line.

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(Millions of dollars)	2022		2021		2022		2021
Refining & Marketing:
Refined products	$	42,090	$	29,257	$	124,547	$	75,594
Crude oil	1,783		1,687		7,648		4,999
Services and other	482		165		1,252		731
Total revenues from external customers	44,355		31,109		133,447		81,324
Midstream:
Refined products	617		441		1,812		1,027
Services and other	815		771		2,381		2,296
Total revenues from external customers	1,432		1,212		4,193		3,323
Sales and other operating revenues	$	45,787	$	32,321	$	137,640	$	84,647

We do not disclose information on the future performance obligations for any contract with expected duration of one year or less at inception. As of September 30, 2022, we do not have future performance obligations that are material to future periods.

Receivables

On the accompanying consolidated balance sheets, receivables, less allowance for doubtful accounts primarily consists of customer receivables. Significant, non-customer balances included in our receivables at September 30, 2022 include matching buy/sell receivables of $5.92 billion.

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Supplemental Cash Flow Information

9 Months Ended

Sep. 30, 2022

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flow Information

Supplemental Cash Flow Information

	Nine Months Ended  September 30,
(Millions of dollars)	2022		2021
Net cash provided by operating activities included:
Interest paid (net of amounts capitalized)	$	837	$	935
Net income taxes paid to (received from) taxing authorities	3,741		2,896
Non-cash investing and financing activities:
Contribution of assets(a)	818		—
Book value of equity method investment(b)	25		—

(a)    Represents the book value of property, plant and equipment, inventory and working capital contributed by MPC to Martinez Renewables LLC. See Note 14 for additional information.

(b)    Represents the book value of MPC’s equity method investment in Watson Cogeneration Company at June 1, 2022 prior to MPC buying out the remaining interest in Watson Cogeneration Company. See Note 14 for additional 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:

	Nine Months Ended  September 30,
(Millions of dollars)	2022		2021
Additions to property, plant and equipment per the consolidated statements of cash flows	$	1,694	$	983
Increase in capital accruals	30		31
Total capital expenditures	$	1,724	$	1,014

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Accumulated Other Comprehensive Loss

9 Months Ended

Sep. 30, 2022

Equity [Abstract]

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.

(Millions of dollars)	Pension Benefits		Other Benefits		Other		Total
Balance as of December 31, 2020	$	(338)	$	(181)	$	7	$	(512)
Other comprehensive gain (loss) before reclassifications, net of tax of $38	115		1		(4)		112
Amounts reclassified from accumulated other comprehensive loss:
Amortization of prior service cost (credit)(a)	(34)		2		—		(32)
Amortization of actuarial loss(a)	35		7		—		42
Settlement loss(a)	64		—		—		64
Other	—		—		(1)		(1)
Tax effect	(15)		(2)		—		(17)
Other comprehensive income (loss)	165		8		(5)		168
Balance as of September 30, 2021	$	(173)	$	(173)	$	2	$	(344)

(Millions of dollars)	Pension Benefits		Other Benefits		Other		Total
Balance as of December 31, 2021	$	(117)	$	49	$	1	$	(67)
Other comprehensive gain (loss) before reclassifications, net of tax of $(44)	(131)		2		(3)		(132)
Amounts reclassified from accumulated other comprehensive loss:
Amortization of prior service credit(a)	(34)		(16)		—		(50)
Amortization of actuarial loss(a)	4		4		—		8
Settlement loss(a)	69		—		—		69
Tax effect	(10)		3		—		(7)
Other comprehensive loss	(102)		(7)		(3)		(112)
Balance as of September 30, 2022	$	(219)	$	42	$	(2)	$	(179)

(a)These accumulated other comprehensive loss components are included in the computation of net periodic benefit cost. See Note 22.

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Pension and Other Postretirement Benefits

9 Months Ended

Sep. 30, 2022

Retirement Benefits [Abstract]

Pension and Other Postretirement Plans

Pension and Other Postretirement Benefits

The following summarizes the components of net periodic benefit costs:

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(Millions of dollars)	2022		2021		2022		2021
Pension Benefits
Service cost	$	48	$	73	$	181	$	221
Interest cost	25		23		72		69
Expected return on plan assets	(33)		(37)		(111)		(99)
Amortization of prior service credit	(11)		(11)		(34)		(34)
Amortization of actuarial (gain) loss	(3)		10		4		35
Settlement loss	13		15		69		64
Net periodic pension benefit cost	$	39	$	73	$	181	$	256
Other Benefits
Service cost	$	6	$	9	$	19	$	26
Interest cost	6		7		16		22
Amortization of prior service cost (credit)	(5)		1		(16)		2
Amortization of actuarial loss	1		2		4		7
Net periodic other benefit cost	$	8	$	19	$	23	$	57

The components of net periodic benefit cost other than the service cost component are included in net interest and other financial costs on the consolidated statements of income.

During the nine months ended September 30, 2022, we made contributions of $15 million to our funded pension plans. Benefit payments related to unfunded pension and other postretirement benefit plans were $12 million and $42 million, respectively, during the nine months ended September 30, 2022.

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Leases

9 Months Ended

Sep. 30, 2022

Leases [Abstract]

Lessor, Sales-type Leases

Leases

Lease revenues included in the consolidated statements of income were as follows:

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(In millions)	2022		2021		2022		2021
Operating leases:
Rental income	$	75	$	88	$	268	$	286

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(In millions)	2022		2021		2022		2021
Sales-type leases:
Interest income (Sales-type rental revenue-fixed minimum)	19		—		19		—
Interest income (Revenue from variable lease payments)	9		—		9		—
Sales-type lease revenue	$	28	$	—	$	28	$	—

During the third quarter of 2022, the approved expansion of a gathering and compression system triggered the first assessment of a third party agreement under ASC 842. As a result of the assessment during the period, the lease was reclassified from an operating lease to a sales-type lease. Accordingly, the underlying property, plant and equipment of $745 million and associated deferred revenue of $277 million were derecognized. The present value of the future lease payments of $914 million and the unguaranteed residual value of $63 million were recorded as the net investment in the lease within receivables and other noncurrent assets. This resulted in a gain of approximately $509 million, which was recorded as a net gain on disposal of assets in the consolidated statements of income. These transactions were non-cash transactions.

Annual minimum undiscounted lease payment receipts under our sales-type leases were as follows as of September 30, 2022:

(In millions)
2022	$	53
2023	166
2024	156
2025	146
2026	136
2027 and thereafter	1,096
Total minimum future rentals	1,753
Less: present value discount	809
Lease receivables(a)	$	944
Current lease receivables(b)	$	106
Long-term lease receivables(c)	838
Unguaranteed residual asset	63
Total sales-type lease assets	$	1,007

(a)    This amount does not include the unguaranteed residual assets.

(b)    Presented in receivables, net on the consolidated balance sheets.

(c)    Presented in other noncurrent assets on the consolidated balance sheets.

Capital expenditures related to assets subject to sales-type lease arrangements were $3 million for the nine months ended September 30, 2022. These amounts are reflected as additions to property, plant and equipment in the consolidated statements of cash flows.

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2022

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 a liability, we are unable to estimate a range of possible loss because the issues involved have not been fully developed through pleadings, discovery or court proceedings. 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 September 30, 2022 and December 31, 2021, accrued liabilities for remediation totaled $383 million and $401 million, respectively. 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 $6 million at both September 30, 2022 and December 31, 2021.

Governmental and other entities in various states have filed climate-related lawsuits against numerous energy companies, including MPC. The lawsuits allege damages as a result of climate change and the plaintiffs are seeking unspecified damages and abatement under various tort theories. We are currently subject to such proceedings in federal or state courts in California, Delaware, Maryland, Hawaii, Rhode Island and South Carolina. Similar lawsuits may be filed in other jurisdictions. At this early stage, the ultimate outcome of these matters remains uncertain, and neither the likelihood of an unfavorable outcome nor the ultimate liability, if any, can be determined.

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.

Other Legal Proceedings

In July 2020, Tesoro High Plains Pipeline Company, LLC (“THPP”), a subsidiary of MPLX, received a Notification of Trespass Determination from the Bureau of Indian Affairs (“BIA”) relating to a portion of the Tesoro High Plains Pipeline that crosses the Fort Berthold Reservation in North Dakota. The notification demanded the immediate cessation of pipeline operations and assessed trespass damages of approximately $187 million. On appeal, the Assistant Secretary - Indian Affairs vacated the BIA’s trespass order and remanded to the Regional Director for the BIA Great Plains Region to issue a new decision based on specified criteria. On December 15, 2020, the Regional Director of the BIA issued a new trespass notice to THPP, finding that THPP was in trespass and assessing trespass damages of approximately $4 million (including interest), which has been paid. The order also required that THPP immediately cease and desist use of the portion of the pipeline that crosses the property at issue. THPP has complied with the Regional Director’s December 15, 2020 notice. In March 2021, THPP received a copy of an order purporting to vacate all orders related to THPP’s alleged trespass issued by the BIA between July 2, 2020 and January 14, 2021. The order directs the Regional Director of the BIA to reconsider the issue of THPP’s alleged trespass and issue a new order, if necessary, after all interested parties have had an opportunity to be heard. On April 23, 2021, THPP filed a lawsuit in the District of North Dakota against the United States of America, the U.S. Department of the Interior and the BIA (together, the “U.S. Government Parties”) challenging the March order purporting to vacate all previous orders related to THPP’s alleged trespass. On February 8, 2022, the U.S. Government Parties filed their answer to THPP’s suit, asserting counterclaims for trespass and ejectment. The U.S. Government parties claim THPP is in continued trespass with respect to the pipeline and seek disgorgement of pipeline profits from June 1, 2013 to present, removal of the pipeline and remediation. We intend to vigorously defend ourselves against these counterclaims. Negotiations with the holders of the property rights at issue to settle this matter have been unsuccessful.

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, individually or collectively, 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

LOOP and LOCAP

MPC and MPLX hold interests in an offshore oil port, LOOP, and MPLX holds an interest in a crude oil pipeline system, LOCAP. Both LOOP and LOCAP have secured various project financings with throughput and deficiency agreements. Under the agreements, MPC, as a shipper, is 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 varies but tends 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 $171 million as of September 30, 2022.

Dakota Access Pipeline

MPLX holds a 9.19 percent indirect interest in a joint venture (“Dakota Access”) that owns and operates the Dakota Access Pipeline and Energy Transfer Crude Oil Pipeline projects, collectively referred to as the Bakken Pipeline system or DAPL. In 2020, the U.S. District Court for the District of Columbia (the “D.D.C.”) ordered the U.S. Army Corps of Engineers (“Army Corps”),

which granted permits and an easement for the Bakken Pipeline system, to prepare an environmental impact statement (“EIS”) relating to an easement under Lake Oahe in North Dakota. The D.D.C. later vacated the easement. The EIS has been delayed and the Army Corps currently expects to release a draft EIS in the first half of 2023.

In May 2021, the D.D.C. denied a renewed request for an injunction to shut down the pipeline while the EIS is being prepared. In June 2021, the D.D.C. issued an order dismissing without prejudice the tribes’ claims against the Dakota Access Pipeline. The litigation could be reopened or new litigation challenging the EIS, once completed, could be filed. The pipeline remains operational.

MPLX has entered into a Contingent Equity Contribution Agreement whereby it, along with the other joint venture owners in the Bakken Pipeline system, has agreed to make equity contributions to the joint venture upon certain events occurring to allow the entities that own and operate the Bakken Pipeline system to satisfy their senior note payment obligations. The senior notes were issued to repay amounts owed by the pipeline companies to fund the cost of construction of the Bakken Pipeline system. If the pipeline were temporarily shut down, MPLX would have to contribute its 9.19 percent pro rata share of funds required to pay interest accruing on the notes and any portion of the principal that matures while the pipeline is shutdown. MPLX also expects to contribute its 9.19 percent pro rata share of any costs to remediate any deficiencies to reinstate the permit and/or return the pipeline into operation. If the vacatur of the easement permit results in a permanent shutdown of the pipeline, MPLX would have to contribute its 9.19 percent pro rata share of the cost to redeem the bonds (including the 1% redemption premium required pursuant to the indenture governing the notes) and any accrued and unpaid interest. As of September 30, 2022, our maximum potential undiscounted payments under the Contingent Equity Contribution Agreement were approximately $170 million.

Crowley Ocean Partners LLC and Crowley Blue Water Partners LLC

In connection with our 50 percent indirect interest in Crowley Ocean Partners LLC, we have agreed to conditionally guarantee our portion of the obligations of the joint venture and its subsidiaries under a senior secured term loan used 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. During the first quarter of 2022, the guarantee for the debt associated with one of the four vessels became effective upon the expiration of the charter for the relevant vessel. As of September 30, 2022, our maximum potential undiscounted payments under this agreement for debt principal totaled $98 million.

In connection with our 50 percent indirect interest in Crowley Blue Water Partners LLC, 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. As of September 30, 2022, our maximum potential undiscounted payments under this arrangement was $101 million.

Other guarantees

We have entered into other guarantees with maximum potential undiscounted payments totaling $97 million as of September 30, 2022, which primarily consist of a commitment to contribute cash to an equity method investee for certain catastrophic events, in lieu of procuring insurance coverage, a commitment to fund a share of the bonds issued by a government entity for construction of public utilities in the event that other industrial users of the facility default on their utility payments and leases of assets containing general lease indemnities and guaranteed residual values.

Contractual Commitments and Contingencies

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 with us if there are significant delays that are not due to force majeure.

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Description of the Business and Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Use of estimates	These interim consolidated financial statements are unaudited; however, in the opinion of our management, these statements reflect all adjustments necessary for a fair statement of the results for the periods reported. All such adjustments are of a normal, recurring nature unless otherwise disclosed. These interim consolidated financial statements, including the notes, have been prepared in accordance with the rules of the SEC applicable to interim period financial statements and do not include all of the information and disclosures required by GAAP for complete financial statements. Certain information and disclosures derived from our audited annual financial statements, prepared in accordance with GAAP, have been condensed or omitted from these interim financial statements.
Inventories	Inventories are carried at the lower of cost or market value. Costs of crude oil and refined products are aggregated on a consolidated basis for purposes of assessing whether the LIFO cost basis of these inventories may have to be written down to market values.
Derivative instruments	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 soybean oil.

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Short-term Investments (Tables)

9 Months Ended

Sep. 30, 2022

Investments, Debt and Equity Securities [Abstract]

Schedule of Available-for-sale Securities Reconciliation

The components of investments were as follows:

	September 30, 2022
(Millions of dollars)	Fair Value Level	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value		Cash and Cash Equivalents		Short-term Investments
Available-for-sale debt securities
Commercial paper	Level 2	$	2,860	$	—	$	(3)	$	2,857	$	604	$	2,253
Certificates of deposit and time deposits	Level 2	3,542		—		(2)		3,540		2,200		1,340
U.S. government securities	Level 1	566		—		—		566		416		150
Corporate notes and bonds	Level 2	16		—		—		16		—		16
Total available-for-sale debt securities		$	6,984	$	—	$	(5)	$	6,979	$	3,220	$	3,759
Cash								4,156		4,156		—
Total								$	11,135	$	7,376	$	3,759

	December 31, 2021
(Millions of dollars)	Fair Value Level	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value		Cash and Cash Equivalents		Short-term Investments
Available-for-sale debt securities
Commercial paper	Level 2	$	4,905	$	—	$	(1)	$	4,904	$	868	$	4,036
Certificates of deposit and time deposits	Level 2	2,024		—		—		2,024		750		1,274
U.S. government securities	Level 1	28		—		—		28		—		28
Corporate notes and bonds	Level 2	271		—		—		271		61		210
Total available-for-sale debt securities		$	7,228	$	—	$	(1)	$	7,227	$	1,679	$	5,548
Cash								3,612		3,612		—
Total								$	10,839	$	5,291	$	5,548

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Discontinued Operations (Tables)

9 Months Ended

Sep. 30, 2022

Discontinued Operations and Disposal Groups [Abstract]

Condensed Income Statement

Results of operations for Speedway are reflected through the close of the sale. The following table presents Speedway results and the gain on sale as reported in income from discontinued operations, net of tax, within our consolidated statements of income.

	Three Months Ended		Nine Months Ended
(Millions of dollars)	September 30, 2021
Revenues, other income and net gain on disposal of assets:
Revenues and other income	$	—	$	8,420
Net gain on disposal of assets	—		11,682
Total revenues, other income and net gain on disposal of assets	—		20,102
Costs and expenses:
Cost of revenues (excludes items below)	—		7,654
Depreciation and amortization	—		3
Selling, general and administrative expenses	—		121
Other taxes	—		75
Total costs and expenses	—		7,853
Income from operations	—		12,249
Net interest and other financial costs	—		6
Income before income taxes	—		12,243
Provision for income taxes	—		3,795
Income from discontinued operations, net of tax	$	—	$	8,448

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Master Limited Partnership (Tables)

9 Months Ended

Sep. 30, 2022

Noncontrolling Interest [Line Items]

Unit Repurchases

Total share repurchases were as follows for the respective periods:

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(In millions, except per share data)	2022		2021		2022		2021
Number of shares repurchased	44		16		115		32
Cash paid for shares repurchased	$	3,908	$	928	$	10,085	$	1,912
Average cost per share	$	92.54	$	58.78	$	88.07	$	60.91

Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net

As a result of equity transactions of MPLX, we are required to adjust non-controlling interest and additional paid-in capital. Changes in MPC’s additional paid-in capital resulting from changes in its ownership interests in MPLX were as follows:

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(Millions of dollars)	2022		2021		2022		2021
Decrease due to change in ownership	$	(67)	$	(44)	$	(117)	$	(120)
Tax impact	23		30		28		68
Decrease in MPC's additional paid-in capital, net of tax	$	(44)	$	(14)	$	(89)	$	(52)

MPLX LP

Noncontrolling Interest [Line Items]

Unit Repurchases

Total unit repurchases were as follows for the respective periods:

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(In millions, except per share data)	2022		2021		2022		2021
Number of common units repurchased	6		6		10		18
Cash paid for common units repurchased	$	180	$	155	$	315	$	465
Average cost per unit	$	31.65	$	28.41	$	31.98	$	26.79

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Variable Interest Entities (Tables)

9 Months Ended

Sep. 30, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Variable Interest Entities

The following table presents balance sheet information for the assets and liabilities of MPLX, which are included in our balance sheets.

(Millions of dollars)	September 30, 2022		December 31, 2021
Assets
Cash and cash equivalents	$	121	$	13
Receivables, less allowance for doubtful accounts	950		660
Inventories	151		142
Other current assets	43		55
Equity method investments	4,108		3,981
Property, plant and equipment, net	18,910		20,042
Goodwill	7,645		7,657
Right of use assets	288		268
Other noncurrent assets	1,689		891
Liabilities
Accounts payable	$	744	$	671
Payroll and benefits payable	4		6
Accrued taxes	102		75
Debt due within one year	982		499
Operating lease liabilities	44		59
Other current liabilities	308		304
Long-term debt	18,797		18,072
Deferred income taxes	14		10
Long-term operating lease liabilities	241		205
Deferred credits and other liabilities	306		559

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Related Party Transactions (Tables)

9 Months Ended

Sep. 30, 2022

Related Party Transactions [Abstract]

Related Party Transactions

Transactions with related parties were as follows:

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(Millions of dollars)	2022		2021		2022		2021
Sales to related parties	$	16	$	13	$	56	$	67
Purchases from related parties	315		251		894		673

Sales to related parties, which are included in sales and other operating revenues, consist primarily of refined product sales to certain of our equity affiliates.

Purchases from related parties are included in cost of revenues. We obtain utilities, transportation services and purchase ethanol from certain of our equity affiliates.

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Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2022

Earnings Per Share [Abstract]

Summary of Earnings Per Common Share

We compute basic earnings per share by dividing net income attributable to MPC less income allocated to participating securities by the weighted average number of shares of common stock outstanding. Since MPC grants certain incentive compensation awards to employees and non-employee directors that are considered to be participating securities, we have calculated our earnings per share using the two-class method. Diluted income per share assumes exercise of certain stock-based compensation awards, provided the effect is not anti-dilutive.

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(In millions, except per share data)	2022		2021		2022		2021
Income from continuing operations, net of tax	$	5,020	$	1,030	$	12,409	$	1,448
Less: Net income attributable to noncontrolling interest	543		336		1,214		932
Net income allocated to participating securities	2		—		6		1
Income from continuing operations available to common stockholders	4,475		694		11,189		515
Income from discontinued operations, net of tax	—		—		—		8,448
Income available to common stockholders	$	4,475	$	694	$	11,189	$	8,963
Weighted average common shares outstanding:
Basic	491		633		528		645
Effect of dilutive securities	3		4		4		4
Diluted	494		637		532		649
Income available to common stockholders per share:
Basic:
Continuing operations	$	9.12	$	1.10	$	21.18	$	0.80
Discontinued operations	—		—		—		13.10
Net income per share	$	9.12	$	1.10	$	21.18	$	13.90
Diluted:
Continuing operations	$	9.06	$	1.09	$	21.04	$	0.79
Discontinued operations	—		—		—		13.02
Net income per share	$	9.06	$	1.09	$	21.04	$	13.81

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.

	Three Months Ended  September 30,		Nine Months Ended  September 30,
(In millions)	2022	2021	2022	2021
Shares issuable under stock-based compensation plans	—	3	—	3

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Equity (Tables)

9 Months Ended

Sep. 30, 2022

Equity [Abstract]

Share Repurchases

Total share repurchases were as follows for the respective periods:

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(In millions, except per share data)	2022		2021		2022		2021
Number of shares repurchased	44		16		115		32
Cash paid for shares repurchased	$	3,908	$	928	$	10,085	$	1,912
Average cost per share	$	92.54	$	58.78	$	88.07	$	60.91

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Segment Information (Tables)

9 Months Ended

Sep. 30, 2022

Segment Reporting [Abstract]

Adjusted EBITDA

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(Millions of dollars)	2022		2021		2022		2021
Segment adjusted EBITDA for reportable segments
Refining & Marketing	$	5,496	$	1,195	$	14,630	$	1,969
Midstream	1,498		1,375		4,357		4,005
Total reportable segments	$	6,994	$	2,570	$	18,987	$	5,974
Reconciliation of segment adjusted EBITDA for reportable segments to income from continuing operations before income taxes
Total reportable segments	$	6,994	$	2,570	$	18,987	$	5,974
Corporate	(160)		(154)		(454)		(428)
Refining planned turnaround costs	(384)		(205)		(680)		(378)
Storm impacts	—		(23)		—		(70)
LIFO inventory charge	(28)		—		(28)		—
Gain on sale of assets(a)	1,058		—		1,058		—
Renewable volume obligation requirements	—		—		238		—
Litigation	—		—		27		—
Impairments(b)	—		—		—		(13)
Idling expenses	—		(12)		—		(12)
Depreciation and amortization(c)	(794)		(836)		(2,418)		(2,551)
Net interest and other financial costs	(240)		(328)		(814)		(1,053)
Income from continuing operations before income taxes	$	6,446	$	1,012	$	15,916	$	1,469

(a)    Includes the non-cash gain related to the contribution of assets by MPC on the formation of the Martinez Renewable joint venture and the non-cash gain on lease reclassification. See Note 14 and 23 for additional information.

(b)    Impairment of equity method investments.

(c)    The three and nine months ended September 30, 2021 includes $13 million and $56 million, respectively, of impairments of long lived assets.

Reconciliation of Revenue from Segments to Consolidated

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(Millions of dollars)	2022		2021		2022		2021
Sales and other operating revenues
Refining & Marketing
Revenues from external customers(a)	$	44,355	$	31,109	$	133,447	$	81,324
Intersegment revenues	13		37		96		95
Refining & Marketing segment revenues	44,368		31,146		133,543		81,419
Midstream
Revenues from external customers(a)	1,432		1,212		4,193		3,323
Intersegment revenues	1,326		1,242		3,881		3,689
Midstream segment revenues	2,758		2,454		8,074		7,012
Total segment revenues	47,126		33,600		141,617		88,431
Less: intersegment revenues	1,339		1,279		3,977		3,784
Consolidated sales and other operating revenues(a)	$	45,787	$	32,321	$	137,640	$	84,647

(a)Includes related party sales. See Note 7 for additional information.

Other Significant Reconciling Items from Segments to Consolidated

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(Millions of dollars)	2022		2021		2022		2021
Income (loss) from equity method investments
Refining & Marketing	$	21	$	8	$	39	$	27
Midstream	159		114		430		292
Corporate(a)	—		—		—		(13)
Consolidated income from equity method investments	$	180	$	122	$	469	$	306
Depreciation and amortization
Refining & Marketing	$	459	$	462	$	1,395	$	1,406
Midstream	322		329		983		994
Corporate	13		45		40		151
Consolidated depreciation and amortization	$	794	$	836	$	2,418	$	2,551
Capital expenditures
Refining & Marketing	$	445	$	228	$	1,004	$	538
Midstream	267		190		772		506
Segment capital expenditures and investments	712		418		1,776		1,044
Less investments in equity method investees	55		37		215		150
Plus:
Corporate	49		28		87		72
Capitalized interest	28		18		76		48
Consolidated capital expenditures(b)	$	734	$	427	$	1,724	$	1,014

(a)Impairment of equity method investment.

(b)Includes changes in capital expenditure accruals. See Note 20 for a reconciliation of total capital expenditures to additions to property, plant and equipment for the nine months ended September 30, 2022 and 2021 as reported in the consolidated statements of cash flows.

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Net Interest and Other Financial Costs (Tables)

9 Months Ended

Sep. 30, 2022

Other Income and Expenses [Abstract]

Net Interest And Other Financial Income (Costs)

Net interest and other financial costs were as follows:

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(Millions of dollars)	2022		2021		2022		2021
Interest income	$	(59)	$	(5)	$	(82)	$	(8)
Interest expense	332		331		966		1,019
Interest capitalized	(29)		(18)		(77)		(54)
Pension and other postretirement non-service costs(a)	(7)		10		4		66
Other financial costs	3		10		3		30
Net interest and other financial costs	$	240	$	328	$	814	$	1,053

(a)See Note 22.

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Inventories (Tables)

9 Months Ended

Sep. 30, 2022

Inventory Disclosure [Abstract]

Summary Of Inventories

(Millions of dollars)	September 30, 2022		December 31, 2021
Crude oil	$	3,565	$	2,639
Refined products	5,188		4,460
Materials and supplies	1,081		956
Total	$	9,834	$	8,055

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Property, Plant and Equipment (Tables)

9 Months Ended

Sep. 30, 2022

Property, Plant and Equipment [Abstract]

Summary Of Property, Plant And Equipment

	September 30, 2022						December 31, 2021
(Millions of dollars)	Gross PP&E		Accumulated Depreciation		Net PP&E		Gross PP&E		Accumulated Depreciation		Net PP&E
Refining & Marketing	$	31,571	$	16,345	$	15,226	$	31,089	$	14,876	$	16,213
Midstream	27,464		7,868		19,596		28,098		7,384		20,714
Corporate	1,539		977		562		1,446		933		513
Total	$	60,574	$	25,190	$	35,384	$	60,633	$	23,193	$	37,440

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2022

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 September 30, 2022 and December 31, 2021 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.

	September 30, 2022
	Fair Value Hierarchy
(Millions of dollars)	Level 1		Level 2		Level 3		Netting and Collateral(a)		Net Carrying Value on Balance Sheet(b)		Collateral Pledged Not Offset
Assets:
Commodity contracts	$	1,044	$	—	$	—	$	(931)	$	113	$	41
Liabilities:
Commodity contracts	$	931	$	—	$	—	$	(931)	$	—	$	—
Embedded derivatives in commodity contracts	—		—		46		—		46		—

	December 31, 2021
	Fair Value Hierarchy
(Millions of dollars)	Level 1		Level 2		Level 3		Netting and Collateral(a)		Net Carrying Value on Balance Sheet(b)		Collateral Pledged Not Offset
Assets:
Commodity contracts	$	270	$	1	$	—	$	(235)	$	36	$	34
Liabilities:
Commodity contracts	$	248	$	1	$	—	$	(249)	$	—	$	—
Embedded derivatives in commodity contracts	—		—		108		—		108		—

(a)Represents the impact of netting assets, liabilities and cash collateral when a legal right of offset exists. As of September 30, 2022, no cash collateral was netted with mark-to-market derivative liabilities. As of December 31, 2021, cash collateral of $14 million was netted with mark-to-market derivative liabilities.

(b)We have no derivative contracts that are covered by master netting arrangements reflected gross on the balance sheet.

Reconciliation of Net Beginning and Ending Balances Recorded for Net Assets and Liabilities Classified as Level 3

The following is a reconciliation of the beginning and ending balances recorded for net liabilities classified as Level 3 in the fair value hierarchy.

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(Millions of dollars)	2022		2021		2022		2021
Beginning balance	$	92	$	102	$	108	$	63
Unrealized and realized (gain)/loss included in net income	(44)		7		(52)		52
Settlements of derivative instruments	(2)		(5)		(10)		(11)
Ending balance	$	46	$	104	$	46	$	104
The amount of total (gain)/loss for the period included in earnings attributable to the change in unrealized losses relating to liabilities still held at the end of period:	$	(42)	$	6	$	(50)	$	44

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Derivatives (Tables)

9 Months Ended

Sep. 30, 2022

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Classification of Fair Values of Derivative Instruments, Excluding Cash Collateral

The following table presents the fair value of derivative instruments as of September 30, 2022 and December 31, 2021 and the line items in the balance sheets in which the fair values are reflected. The fair value amounts below are presented on a gross basis and do not reflect the netting of asset and liability positions permitted under the terms of our master netting arrangements including cash collateral on deposit with, or received from, brokers. We offset the recognized fair value amounts for multiple derivative instruments executed with the same counterparty in our financial statements when a legal right of offset exists. As a result, the asset and liability amounts below will not agree with the amounts presented in our consolidated balance sheets.

(Millions of dollars)	September 30, 2022				December 31, 2021
Balance Sheet Location	Asset		Liability		Asset		Liability
Commodity derivatives
Other current assets	$	1,044	$	931	$	271	$	249
Other current liabilities(a)	—		7		—		15
Deferred credits and other liabilities(a)	—		39		—		93

(a)     Includes embedded derivatives.

Open Commodity Derivative Contracts

The table below summarizes open commodity derivative contracts for crude oil, refined products, blending products and soybean oil as of September 30, 2022.

	Percentage of contracts that expire next quarter	Position
(Units in thousands of barrels)		Long	Short
Exchange-traded(a)
Crude oil	77.6%	121,558	124,469
Refined products	87.0%	13,316	14,280
Blending products	80.9%	3,694	8,883
Soybean oil	92.8%	2,957	3,479

(a)    Included in exchange-traded are spread contracts in thousands of barrels: Crude oil - 35,170 long and 31,175 short; Refined products - 778 long and 836 short. There are no spread contracts for blending products or soybean oil.

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: 

	Gain (Loss)
(Millions of dollars)	Three Months Ended  September 30,				Nine Months Ended  September 30,
Income Statement Location	2022		2021		2022		2021
Sales and other operating revenues	$	—	$	(19)	$	—	$	(34)
Cost of revenues	260		(121)		(65)		(354)
Other income	—		—		1		—
Total	$	260	$	(140)	$	(64)	$	(388)

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Debt (Tables)

9 Months Ended

Sep. 30, 2022

Debt Disclosure [Abstract]

Outstanding Borrowings

Our outstanding borrowings at September 30, 2022 and December 31, 2021 consisted of the following:

(Millions of dollars)	September 30, 2022		December 31, 2021
Marathon Petroleum Corporation:
Senior notes	$	6,449	$	6,449
Notes payable	1		1
Finance lease obligations	543		589
Total	$	6,993	$	7,039
MPLX LP:
Bank revolving credit facility	—		300
Senior notes	20,100		18,600
Finance lease obligations	8		9
Total	$	20,108	$	18,909
Total debt	$	27,101	$	25,948
Unamortized debt issuance costs	(145)		(129)
Unamortized (discount) premium, net	(254)		(280)
Amounts due within one year	(1,064)		(571)
Total long-term debt due after one year	$	25,638	$	24,968

Schedule of Line of Credit Facilities

Available Capacity under our Credit Facilities as of September 30, 2022

(Millions of dollars)	Total Capacity		Outstanding Borrowings		Outstanding Letters of Credit		Available Capacity		Weighted Average Interest Rate		Expiration
MPC, excluding MPLX
MPC bank revolving credit facility	$	5,000	$	—	$	1	$	4,999	—	%	July 2027
MPC trade receivables securitization facility(a)	100		—		100		—		—		September 2023
MPLX
MPLX bank revolving credit facility	2,000		—		—		2,000		—	%	July 2027

(a)    The committed borrowing and letter of credit issuance capacity of the trade receivables securitization facility is $100 million. In addition, the facility allows for the issuance of letters of credit in excess of the committed capacity at the discretion of the issuing banks. As of September 30, 2022, letters of credit in the total amount of $1.153 billion were issued and outstanding under the facility to secure contracts awarded by the Department of Energy to purchase crude oil from the Strategic Petroleum Reserve. In July 2022, the trade receivables securitization facility was amended to, among other things, extend its term until September 29, 2023.

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Revenue (Tables)

9 Months Ended

Sep. 30, 2022

Revenue from Contract with Customer [Abstract]

Revenue from External Customers by Products and Services

The following table presents our revenues from external customers disaggregated by segment and product line.

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(Millions of dollars)	2022		2021		2022		2021
Refining & Marketing:
Refined products	$	42,090	$	29,257	$	124,547	$	75,594
Crude oil	1,783		1,687		7,648		4,999
Services and other	482		165		1,252		731
Total revenues from external customers	44,355		31,109		133,447		81,324
Midstream:
Refined products	617		441		1,812		1,027
Services and other	815		771		2,381		2,296
Total revenues from external customers	1,432		1,212		4,193		3,323
Sales and other operating revenues	$	45,787	$	32,321	$	137,640	$	84,647

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Supplemental Cash Flow Information (Tables)

9 Months Ended

Sep. 30, 2022

Supplemental Cash Flow Elements [Abstract]

Summary of Supplemental Cash Flow Information

	Nine Months Ended  September 30,
(Millions of dollars)	2022		2021
Net cash provided by operating activities included:
Interest paid (net of amounts capitalized)	$	837	$	935
Net income taxes paid to (received from) taxing authorities	3,741		2,896
Non-cash investing and financing activities:
Contribution of assets(a)	818		—
Book value of equity method investment(b)	25		—

(a)    Represents the book value of property, plant and equipment, inventory and working capital contributed by MPC to Martinez Renewables LLC. See Note 14 for additional information.

(b)    Represents the book value of MPC’s equity method investment in Watson Cogeneration Company at June 1, 2022 prior to MPC buying out the remaining interest in Watson Cogeneration Company. See Note 14 for additional information.

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:

	Nine Months Ended  September 30,
(Millions of dollars)	2022		2021
Additions to property, plant and equipment per the consolidated statements of cash flows	$	1,694	$	983
Increase in capital accruals	30		31
Total capital expenditures	$	1,724	$	1,014

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Accumulated Other Comprehensive Loss (Tables)

9 Months Ended

Sep. 30, 2022

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.

(Millions of dollars)	Pension Benefits		Other Benefits		Other		Total
Balance as of December 31, 2020	$	(338)	$	(181)	$	7	$	(512)
Other comprehensive gain (loss) before reclassifications, net of tax of $38	115		1		(4)		112
Amounts reclassified from accumulated other comprehensive loss:
Amortization of prior service cost (credit)(a)	(34)		2		—		(32)
Amortization of actuarial loss(a)	35		7		—		42
Settlement loss(a)	64		—		—		64
Other	—		—		(1)		(1)
Tax effect	(15)		(2)		—		(17)
Other comprehensive income (loss)	165		8		(5)		168
Balance as of September 30, 2021	$	(173)	$	(173)	$	2	$	(344)

(Millions of dollars)	Pension Benefits		Other Benefits		Other		Total
Balance as of December 31, 2021	$	(117)	$	49	$	1	$	(67)
Other comprehensive gain (loss) before reclassifications, net of tax of $(44)	(131)		2		(3)		(132)
Amounts reclassified from accumulated other comprehensive loss:
Amortization of prior service credit(a)	(34)		(16)		—		(50)
Amortization of actuarial loss(a)	4		4		—		8
Settlement loss(a)	69		—		—		69
Tax effect	(10)		3		—		(7)
Other comprehensive loss	(102)		(7)		(3)		(112)
Balance as of September 30, 2022	$	(219)	$	42	$	(2)	$	(179)

(a)These accumulated other comprehensive loss components are included in the computation of net periodic benefit cost. See Note 22.

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Pension and Other Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2022

Retirement Benefits [Abstract]

Components of Net Periodic Benefit Costs

The following summarizes the components of net periodic benefit costs:

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(Millions of dollars)	2022		2021		2022		2021
Pension Benefits
Service cost	$	48	$	73	$	181	$	221
Interest cost	25		23		72		69
Expected return on plan assets	(33)		(37)		(111)		(99)
Amortization of prior service credit	(11)		(11)		(34)		(34)
Amortization of actuarial (gain) loss	(3)		10		4		35
Settlement loss	13		15		69		64
Net periodic pension benefit cost	$	39	$	73	$	181	$	256
Other Benefits
Service cost	$	6	$	9	$	19	$	26
Interest cost	6		7		16		22
Amortization of prior service cost (credit)	(5)		1		(16)		2
Amortization of actuarial loss	1		2		4		7
Net periodic other benefit cost	$	8	$	19	$	23	$	57

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Leases (Tables)

9 Months Ended

Sep. 30, 2022

Leases [Abstract]

Operating Lease, Lease Income

Lease revenues included in the consolidated statements of income were as follows:

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(In millions)	2022		2021		2022		2021
Operating leases:
Rental income	$	75	$	88	$	268	$	286

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(In millions)	2022		2021		2022		2021
Sales-type leases:
Interest income (Sales-type rental revenue-fixed minimum)	19		—		19		—
Interest income (Revenue from variable lease payments)	9		—		9		—
Sales-type lease revenue	$	28	$	—	$	28	$	—

Sales-type Lease, Lease Income

Lease revenues included in the consolidated statements of income were as follows:

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(In millions)	2022		2021		2022		2021
Operating leases:
Rental income	$	75	$	88	$	268	$	286

	Three Months Ended  September 30,				Nine Months Ended  September 30,
(In millions)	2022		2021		2022		2021
Sales-type leases:
Interest income (Sales-type rental revenue-fixed minimum)	19		—		19		—
Interest income (Revenue from variable lease payments)	9		—		9		—
Sales-type lease revenue	$	28	$	—	$	28	$	—

Sales-type and Direct Financing Leases, Lease Receivable, Maturity

Annual minimum undiscounted lease payment receipts under our sales-type leases were as follows as of September 30, 2022:

(In millions)
2022	$	53
2023	166
2024	156
2025	146
2026	136
2027 and thereafter	1,096
Total minimum future rentals	1,753
Less: present value discount	809
Lease receivables(a)	$	944
Current lease receivables(b)	$	106
Long-term lease receivables(c)	838
Unguaranteed residual asset	63
Total sales-type lease assets	$	1,007

(a)    This amount does not include the unguaranteed residual assets.

(b)    Presented in receivables, net on the consolidated balance sheets.

(c)    Presented in other noncurrent assets on the consolidated balance sheets.

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Short-term Investments (Components of Investments) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 6,984	$ 7,228
Unrealized Gains	0	0
Unrealized Losses	(5)	(1)
Fair Value	6,979	7,227
Cash	4,156	3,612
Short-term investments and cash	11,135	10,839
Commercial Paper [Member] | Level 2
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,860	4,905
Unrealized Gains	0	0
Unrealized Losses	(3)	(1)
Fair Value	2,857	4,904
Certificates of deposit and time deposits | Level 2
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	3,542	2,024
Unrealized Gains	0	0
Unrealized Losses	(2)	0
Fair Value	3,540	2,024
U.S. government securities | Level 1
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	566	28
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	566	28
Corporate notes and bonds | Level 2
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	16	271
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	16	271
Cash and Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Fair Value	3,220	1,679
Cash	4,156	3,612
Short-term investments and cash	7,376	5,291
Cash and Cash Equivalents | Commercial Paper [Member] | Level 2
Debt Securities, Available-for-sale [Line Items]
Fair Value	604	868
Cash and Cash Equivalents | Certificates of deposit and time deposits | Level 2
Debt Securities, Available-for-sale [Line Items]
Fair Value	2,200	750
Cash and Cash Equivalents | U.S. government securities | Level 1
Debt Securities, Available-for-sale [Line Items]
Fair Value	416	0
Cash and Cash Equivalents | Corporate notes and bonds | Level 2
Debt Securities, Available-for-sale [Line Items]
Fair Value	0	61
Short-term Investments
Debt Securities, Available-for-sale [Line Items]
Fair Value	3,759	5,548
Cash	0	0
Short-term investments and cash	3,759	5,548
Short-term Investments | Commercial Paper [Member] | Level 2
Debt Securities, Available-for-sale [Line Items]
Fair Value	2,253	4,036
Short-term Investments | Certificates of deposit and time deposits | Level 2
Debt Securities, Available-for-sale [Line Items]
Fair Value	1,340	1,274
Short-term Investments | U.S. government securities | Level 1
Debt Securities, Available-for-sale [Line Items]
Fair Value	150	28
Short-term Investments | Corporate notes and bonds | Level 2
Debt Securities, Available-for-sale [Line Items]
Fair Value	$ 16	$ 210

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Discontinued Operations (Details) - Speedway - Discontinued Operations, Disposed of by Sale $ in Millions	May 14, 2021 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash proceeds from sale of Speedway	$ 21,380
Proceeds from the sale of Speedway, net of tax	17,220
Gain from disposal of discontinued operation, before income tax	11,680
Gain on disposal of discontinued operation, net of tax	$ 8,020

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Discontinued Operations (Results of Operations associated with Discontinued Operations) (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021		Sep. 30, 2022	Sep. 30, 2021
Revenues, other income and net gain on disposal of assets:
Total revenues, other income and net gain on disposal of assets	$ 47,237	$ 32,613		$ 139,859	$ 85,322
Costs and expenses:
Cost of revenues (excludes items below)	38,821	29,563		118,096	77,824
Depreciation and amortization	794	836	[1]	2,418	2,551	[1]
Selling, general and administrative expenses	712	681		2,009	1,881
Other taxes	224	193		606	544
Total costs and expenses	40,551	31,273		123,129	82,800
Income from operations	6,686	1,340		16,730	2,522
Net interest and other financial costs	240	328		814	1,053
Income from discontinued operations, net of tax	$ 0	0		$ 0	8,448
Discontinued Operations, Disposed of by Sale
Revenues, other income and net gain on disposal of assets:
Revenues and other income		0			8,420
Net gain on disposal of assets		0			11,682
Total revenues, other income and net gain on disposal of assets		0			20,102
Costs and expenses:
Cost of revenues (excludes items below)		0			7,654
Depreciation and amortization		0			3
Selling, general and administrative expenses		0			121
Other taxes		0			75
Total costs and expenses		0			7,853
Income from operations		0			12,249
Net interest and other financial costs		0			6
Income before income taxes		0			12,243
Provision for income taxes		0			3,795
Income from discontinued operations, net of tax		$ 0			$ 8,448

[1] The three and nine months ended September 30, 2021 includes $13 million and $56 million, respectively, of impairments of long lived assets.

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Master Limited Partnership (Details)	Sep. 30, 2022
MPLX | Marathon Petroleum Corporation
MPC's partnership interest in MLP (in percentage)	64.00%

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Master Limited Partnership (Unit Repurchase Program) (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Oct. 31, 2022	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Aug. 02, 2022	Nov. 02, 2020
Stock repurchase program, authorized amount		$ 10,000		$ 10,000
Units acquired, average cost per unit		$ 92.54	$ 58.78	$ 88.07	$ 60.91
Stock repurchase program, remaining authorized repurchase amount		$ 5,110		$ 5,110
Share Repurchase Authorization August 2022
Stock repurchase program, authorized amount						$ 5,000
MPLX LP
Stock repurchase program, authorized amount							$ 1,000
Units repurchased, units		6,000,000	6,000,000	10,000,000	18,000,000
Units repurchased, value		$ 180	$ 155	$ 315	$ 465
Units acquired, average cost per unit		$ 31.65	$ 28.41	$ 31.98	$ 26.79
Stock repurchase program, remaining authorized repurchase amount		$ 1,000		$ 1,000
MPLX LP | Subsequent Event
Units repurchased, units	532,326
Units repurchased, value	$ 16
MPLX LP | Share Repurchase Authorization August 2022
Stock repurchase program, authorized amount						$ 1,000

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Master Limited Partnership (Noncontrolling Interest) (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Equity transactions of MPLX	$ (173)	$ (42)	$ (88)	$ (130)	$ (148)	$ (124)
Additional Paid-in Capital
Decrease due to change in ownership	(67)			(44)			$ (117)	$ (120)
Tax impact	23			30			28	68
Equity transactions of MPLX	$ (44)	$ (20)	$ (25)	$ (14)	$ (34)	$ (4)	$ (89)	$ (52)

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Variable Interest Entities (Consolidated VIEs) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Assets
Cash and cash equivalents	$ 7,376	$ 5,291
Receivables, less allowance for doubtful accounts	13,458	11,034
Inventories	9,834	8,055
Other current assets	858	568
Equity method investments	6,493	5,409
Property, plant and equipment, net	35,384	37,440
Goodwill	8,244	8,256
Right of use assets	1,200	1,372
Other noncurrent assets	3,088	2,400
Liabilities
Accounts payable	16,682	13,700
Payroll and benefits payable	773	911
Accrued taxes	1,042	1,231
Debt due within one year	1,064	571
Operating lease liabilities	355	438
Other current liabilities	1,398	1,047
Long-term debt	25,638	24,968
Deferred income taxes	5,610	5,638
Long-term operating lease liabilities	839	927
Deferred credits and other liabilities	1,213	1,346
Variable Interest Entity, Primary Beneficiary | MPLX
Assets
Cash and cash equivalents	121	13
Receivables, less allowance for doubtful accounts	950	660
Inventories	151	142
Other current assets	43	55
Equity method investments	4,108	3,981
Property, plant and equipment, net	18,910	20,042
Goodwill	7,645	7,657
Right of use assets	288	268
Other noncurrent assets	1,689	891
Liabilities
Accounts payable	744	671
Payroll and benefits payable	4	6
Accrued taxes	102	75
Debt due within one year	982	499
Operating lease liabilities	44	59
Other current liabilities	308	304
Long-term debt	18,797	18,072
Deferred income taxes	14	10
Long-term operating lease liabilities	241	205
Deferred credits and other liabilities	$ 306	$ 559

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Related Party Transactions (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Related Party Transactions [Abstract]
Sales to related parties	$ 16	$ 13	$ 56	$ 67
Purchases from related parties	$ 315	$ 251	$ 894	$ 673

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Earnings Per Share (Summary of Earnings Per Share) (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Earnings Per Share [Abstract]
Income from continuing operations, net of tax	$ 5,020	$ 1,030	$ 12,409	$ 1,448
Less: Net income attributable to noncontrolling interest	543	336	1,214	932
Net income allocated to participating securities	2	0	6	1
Income from continuing operations available to common stockholders	4,475	694	11,189	515
Income from discontinued operations, net of tax	0	0	0	8,448
Income available to common stockholders	$ 4,475	$ 694	$ 11,189	$ 8,963
Weighted average common shares outstanding:
Basic (in shares)	491	633	528	645
Effect of dilutive securities (in shares)	3	4	4	4
Diluted (in shares)	494	637	532	649
Basic:
Continuing operations	$ 9.12	$ 1.10	$ 21.18	$ 0.80
Discontinued operations	0	0	0	13.10
Net income per share	9.12	1.10	21.18	13.90
Diluted:
Continuing operations	9.06	1.09	21.04	0.79
Discontinued operations	0	0	0	13.02
Net income per share	$ 9.06	$ 1.09	$ 21.04	$ 13.81

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Earnings Per Share (Anti-dilutive Shares) (Details) - shares shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Stock Based Compensation Expense
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares issuable under stock-based compensation plans	0	3	0	3

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Equity (Details) - USD ($) $ in Millions	Sep. 30, 2022	Aug. 02, 2022
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount	$ 10,000
Stock repurchase program, remaining authorized repurchase amount	$ 5,110
Share Repurchase Authorization August 2022
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount		$ 5,000

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Equity (Share Repurchases) (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Oct. 31, 2022	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Equity, Class of Treasury Stock [Line Items]
Number of shares repurchased		44,000,000	16,000,000	115,000,000	32,000,000
Cash paid for shares repurchased		$ 3,908	$ 928	$ 10,085	$ 1,912
Average cost per share		$ 92.54	$ 58.78	$ 88.07	$ 60.91
Subsequent Event
Equity, Class of Treasury Stock [Line Items]
Number of shares repurchased	1,577,829
Cash paid for shares repurchased	$ 157

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Segment Information (Additional Information) (Detail)	9 Months Ended
	Sep. 30, 2022 Segment
Segment Reporting [Abstract]
Number of reportable segments	2

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Segment Information (Segment Adjusted EBITDA to Income (Loss) from Continuing Operations before Income Taxes) (Detail) - USD ($) $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2022		Sep. 30, 2021		Sep. 30, 2022		Sep. 30, 2021
Segment Reporting Information [Line Items]
Refining planned turnaround costs	$ (384)		$ (205)		$ (680)		$ (378)
Storm impacts	0		(23)		0		(70)
LIFO inventory charge	(28)		0		(28)		0
Gain on sale of assets	1,058	[1]	0		1,058	[1]	0
Renewable volume obligation requirements	0		0		238		0
Litigation	0		0		27		0
Impairments	0		0	[2]	0		(13)	[2]
Idling expenses	0		(12)		0		(12)
Depreciation and amortization	(794)		(836)	[3]	(2,418)		(2,551)	[3]
Net interest and other financial costs	(240)		(328)		(814)		(1,053)
Income from continuing operations before income taxes	6,446		1,012		15,916		1,469
Depreciation and Amortization
Segment Reporting Information [Line Items]
Impairments			(13)				(56)
Operating Segments
Segment Reporting Information [Line Items]
Adjusted EBITDA	6,994		2,570		18,987		5,974
Corporate
Segment Reporting Information [Line Items]
Costs and expenses, excluding depreciation	(160)		(154)		(454)		(428)
Depreciation and amortization	(13)		(45)		(40)		(151)
Refining & Marketing | Operating Segments
Segment Reporting Information [Line Items]
Adjusted EBITDA	5,496		1,195		14,630		1,969
Depreciation and amortization	(459)		(462)		(1,395)		(1,406)
Midstream | Operating Segments
Segment Reporting Information [Line Items]
Adjusted EBITDA	1,498		1,375		4,357		4,005
Depreciation and amortization	$ (322)		$ (329)		$ (983)		$ (994)

[1] Includes the non-cash gain related to the contribution of assets by MPC on the formation of the Martinez Renewable joint venture and the non-cash gain on lease reclassification. See Note 14 and 23 for additional information.

[2] Impairment of equity method investments.

[3] The three and nine months ended September 30, 2021 includes $13 million and $56 million, respectively, of impairments of long lived assets.

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Segment Information (Reconciliation of Segment Revenues To Sales and Other Operating Revenues) (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022		Sep. 30, 2021
Segment Reporting Information [Line Items]
Sales and other operating revenues		$ 45,787	$ 32,321	$ 137,640	[1]	$ 84,647	[1]
Refining & Marketing
Segment Reporting Information [Line Items]
Sales and other operating revenues	[1]	44,355	31,109	133,447		81,324
Midstream
Segment Reporting Information [Line Items]
Sales and other operating revenues	[1]	1,432	1,212	4,193		3,323
Intersegment Eliminations
Segment Reporting Information [Line Items]
Sales and other operating revenues		1,339	1,279	3,977		3,784
Intersegment Eliminations | Refining & Marketing
Segment Reporting Information [Line Items]
Sales and other operating revenues		13	37	96		95
Intersegment Eliminations | Midstream
Segment Reporting Information [Line Items]
Sales and other operating revenues		1,326	1,242	3,881		3,689
Operating Segments
Segment Reporting Information [Line Items]
Sales and other operating revenues		47,126	33,600	141,617		88,431
Operating Segments | Refining & Marketing
Segment Reporting Information [Line Items]
Sales and other operating revenues		44,368	31,146	133,543		81,419
Operating Segments | Midstream
Segment Reporting Information [Line Items]
Sales and other operating revenues		$ 2,758	$ 2,454	$ 8,074		$ 7,012

[1] Includes related party sales. See Note 7 for additional information

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Segment Information (Income from Equity Method Investments) (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021		Sep. 30, 2022	Sep. 30, 2021
Reconciliation Of Segment Capital Expenditures And Investments To Total Capital Expenditures [Line Items]
Income from equity method investments	$ 180	$ 122		$ 469	$ 306
Operating Segments | Refining & Marketing
Reconciliation Of Segment Capital Expenditures And Investments To Total Capital Expenditures [Line Items]
Income from equity method investments	21	8		39	27
Operating Segments | Midstream
Reconciliation Of Segment Capital Expenditures And Investments To Total Capital Expenditures [Line Items]
Income from equity method investments	159	114		430	292
Corporate
Reconciliation Of Segment Capital Expenditures And Investments To Total Capital Expenditures [Line Items]
Income from equity method investments	$ 0	$ 0	[1]	$ 0	$ (13)	[1]

[1] Impairment of equity method investment.

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Segment Information (Depreciation and Amortization) (Detail) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021		Sep. 30, 2022	Sep. 30, 2021
Reconciliation Of Segment Capital Expenditures And Investments To Total Capital Expenditures [Line Items]
Depreciation and amortization	$ 794	$ 836	[1]	$ 2,418	$ 2,551	[1]
Operating Segments | Refining & Marketing
Reconciliation Of Segment Capital Expenditures And Investments To Total Capital Expenditures [Line Items]
Depreciation and amortization	459	462		1,395	1,406
Operating Segments | Midstream
Reconciliation Of Segment Capital Expenditures And Investments To Total Capital Expenditures [Line Items]
Depreciation and amortization	322	329		983	994
Corporate
Reconciliation Of Segment Capital Expenditures And Investments To Total Capital Expenditures [Line Items]
Depreciation and amortization	$ 13	$ 45		$ 40	$ 151

[1] The three and nine months ended September 30, 2021 includes $13 million and $56 million, respectively, of impairments of long lived assets.

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Segment Information (Capital Expenditures (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Plus:
Capital expenditures	[1]	$ 734	$ 427	$ 1,724	$ 1,014
Operating Segments
Reconciliation Of Segment Capital Expenditures And Investments To Total Capital Expenditures [Line Items]
Capital expenditures and investments		712	418	1,776	1,044
Less investments in equity method investees		55	37	215	150
Operating Segments | Refining & Marketing
Reconciliation Of Segment Capital Expenditures And Investments To Total Capital Expenditures [Line Items]
Capital expenditures and investments		445	228	1,004	538
Operating Segments | Midstream
Reconciliation Of Segment Capital Expenditures And Investments To Total Capital Expenditures [Line Items]
Capital expenditures and investments		267	190	772	506
Corporate
Plus:
Corporate		49	28	87	72
Capitalized interest		$ 28	$ 18	$ 76	$ 48

[1] Includes changes in capital expenditure accruals. See Note 20 for a reconciliation of total capital expenditures to additions to property, plant and equipment for the nine months ended September 30, 2022 and 2021 as reported in the consolidated statements of cash flows.

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Net Interest and Other Financial Costs (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Other Income and Expenses [Abstract]
Interest income		$ (59)	$ (5)	$ (82)	$ (8)
Interest expense		332	331	966	1,019
Interest capitalized		(29)	(18)	(77)	(54)
Pension and other postretirement non-service costs	[1]	(7)	10	4	66
Other financial costs		3	10	3	30
Net interest and other financial costs		$ 240	$ 328	$ 814	$ 1,053

[1] See Note 22.

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Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Provision (benefit) for income taxes on continuing operations	$ 1,426	$ (18)	$ 3,507	$ 21

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Inventories (Summary of Inventories) (Detail) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Inventory Disclosure [Abstract]
Crude oil	$ 3,565	$ 2,639
Refined products	5,188	4,460
Materials and supplies	1,081	956
Total	$ 9,834	$ 8,055

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Inventories (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Inventory Disclosure [Abstract]
LIFO inventory charge	$ 28	$ 0	$ 28	$ 0

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Equity Method Investments (Martinez Renewables LLC) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Sep. 21, 2022	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Schedule of Equity Method Investments [Line Items]
Payments to acquire interest in joint venture				$ 215	$ 150
Net gain on disposal of assets		$ 1,051	$ 0	1,072	3
Proceeds from equity method investment, return of capital				511	$ 39
Equity method investments		6,493		6,493		$ 5,409
Martinez Renewables LLC
Schedule of Equity Method Investments [Line Items]
Fair value of assets contributed	$ 1,471
Net gain on disposal of assets	549
Proceeds from equity method investment, return of capital	500
Equity method investments		$ 971		$ 971
Martinez Renewables LLC | Neste
Schedule of Equity Method Investments [Line Items]
Payments to acquire interest in joint venture	$ 728

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Equity Method Investments (Watson Cogeneration Company) (Details) $ in Millions		3 Months Ended		9 Months Ended
	Jun. 01, 2022 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)		Sep. 30, 2021 USD ($)
Schedule of Equity Method Investments [Line Items]
Payments to acquire business				$ 74		$ 0
Book value of equity method investment				25	[1]	0
Net gain on disposal of assets		$ 1,051	$ 0	$ 1,072		$ 3
Watson Cogeneration Company
Schedule of Equity Method Investments [Line Items]
Remaining ownership interest purchased	0.49
Payments to acquire business	$ 59
Fair value of assets contributed	62
Book value of equity method investment	$ 25
Ownership percentage	51.00%
Net gain on disposal of assets	$ 37

[1] Represents the book value of MPC’s equity method investment in Watson Cogeneration Company at June 1, 2022 prior to MPC buying out the remaining interest in Watson Cogeneration Company. See Note 14 for additional information.

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Property, Plant and Equipment (Summary of Property, Plant And Equipment) (Detail) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Gross PP&E	$ 60,574	$ 60,633
Accumulated Depreciation	25,190	23,193
Net PP&E	35,384	37,440
Operating Segments | Refining & Marketing
Property, Plant and Equipment [Line Items]
Gross PP&E	31,571	31,089
Accumulated Depreciation	16,345	14,876
Net PP&E	15,226	16,213
Operating Segments | Midstream
Property, Plant and Equipment [Line Items]
Gross PP&E	27,464	28,098
Accumulated Depreciation	7,868	7,384
Net PP&E	19,596	20,714
Corporate
Property, Plant and Equipment [Line Items]
Gross PP&E	1,539	1,446
Accumulated Depreciation	977	933
Net PP&E	$ 562	$ 513

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Fair Value Measurements (Assets and Liabilities Accounted for at Fair Value on Recurring Basis) (Detail) - USD ($) $ in Millions		Sep. 30, 2022	Dec. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash collateral netted with derivative liabilities		$ 0	$ 14
Fair Value, Measurements, Recurring | Commodity derivatives
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commodity derivative instruments, assets - netting and collateral	[1]	(931)	(235)
Derivative asset, net carrying value on balance sheet	[2]	113	36
Commodity derivative instruments, assets - collateral pledged not offset		41	34
Commodity derivative instruments, liabilities - netting and collateral	[1]	(931)	(249)
Derivative liability, net carrying value on balance sheet	[2]	0	0
Commodity derivative instruments, liabilities - collateral pledged not offset		0	0
Fair Value, Measurements, Recurring | Embedded derivatives in commodity contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commodity derivative instruments, liabilities - netting and collateral		0	0
Derivative liability, net carrying value on balance sheet	[2]	46	108
Commodity derivative instruments, liabilities - collateral pledged not offset		0	0
Fair Value, Measurements, Recurring | Level 1 | Commodity derivatives
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commodity derivative instruments, assets - gross		1,044	270
Commodity derivative instruments, liabilities - gross		931	248
Fair Value, Measurements, Recurring | Level 1 | Embedded derivatives in commodity contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commodity derivative instruments, liabilities - gross		0	0
Fair Value, Measurements, Recurring | Level 2 | Commodity derivatives
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commodity derivative instruments, assets - gross		0	1
Commodity derivative instruments, liabilities - gross		0	1
Fair Value, Measurements, Recurring | Level 2 | Embedded derivatives in commodity contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commodity derivative instruments, liabilities - gross		0	0
Fair Value, Measurements, Recurring | Level 3 | Commodity derivatives
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commodity derivative instruments, assets - gross		0	0
Commodity derivative instruments, liabilities - gross		0	0
Fair Value, Measurements, Recurring | Level 3 | Embedded derivatives in commodity contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commodity derivative instruments, liabilities - gross		$ 46	$ 108

[1] Represents the impact of netting assets, liabilities and cash collateral when a legal right of offset exists. As of September 30, 2022, no cash collateral was netted with mark-to-market derivative liabilities. As of December 31, 2021, cash collateral of $14 million was netted with mark-to-market derivative liabilities.

[2] We have no derivative contracts that are covered by master netting arrangements reflected gross on the balance sheet.

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Fair Value Measurements (Level 3) (Details)	9 Months Ended
	Sep. 30, 2022 $ / gal USD ($)
Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Average forward price | $ / gal	0.75
Embedded derivatives in commodity contracts
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Term of contract	5 years
Embedded derivatives in commodity contracts | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Probability of renewal second term	100.00%
Minimum | Embedded derivatives in commodity contracts | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Forward commodity price	0.51
Maximum | Embedded derivatives in commodity contracts | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Forward commodity price	1.56

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Fair Value Measurements (Reconciliation of Net Beginning and Ending Balances Recorded for Net Assets and Liabilities Classified as Level 3) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 92	$ 102	$ 108	$ 63
Unrealized and realized (gain)/loss included in net income	(44)	7	(52)	52
Settlements of derivative instruments	(2)	(5)	(10)	(11)
Ending balance	$ 46	$ 104	$ 46	$ 104

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Fair Value Measurements (Gain/Loss Included in Earnings Relating to Assets Still Held at End of Period) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Fair Value Disclosures [Abstract]
The amount of total (gain)/loss for the period included in earnings attributable to the change in unrealized losses relating to liabilities still held at the end of period:	$ (42)	$ 6	$ (50)	$ 44

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Fair Value Measurements (Fair Values - Reported) (Detail) - USD ($) $ in Billions	Sep. 30, 2022	Dec. 31, 2021
Reported Value Measurement
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 26.3	$ 25.1
Estimate of Fair Value Measurement
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 23.3	$ 28.1

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Derivatives (Classification of Gross Fair Values of Derivative Instruments, Excluding Cash Collateral) (Detail) - Commodity derivatives - USD ($) $ in Millions		Sep. 30, 2022	Dec. 31, 2021
Other current assets
Derivative [Line Items]
Asset		$ 1,044	$ 271
Liability		931	249
Other current liabilities
Derivative [Line Items]
Asset		0	0
Liability	[1]	7	15
Deferred credits and other liabilities
Derivative [Line Items]
Asset		0	0
Liability	[1]	$ 39	$ 93

[1] Includes embedded derivatives.

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Derivatives (Open Commodity Derivative Contracts) (Details) - Exchange Traded bbl in Thousands	9 Months Ended
	Sep. 30, 2022 bbl
Crude oil
Derivative [Line Items]
Percentage of derivative contracts expiring in the period	77.60%
Crude oil | Long
Derivative [Line Items]
Notional contracts (in thousands of total barrels)	121,558
Crude oil | Long | Spread Contracts
Derivative [Line Items]
Notional contracts (in thousands of total barrels)	35,170
Crude oil | Short
Derivative [Line Items]
Notional contracts (in thousands of total barrels)	124,469
Crude oil | Short | Spread Contracts
Derivative [Line Items]
Notional contracts (in thousands of total barrels)	31,175
Refined products
Derivative [Line Items]
Percentage of derivative contracts expiring in the period	87.00%
Refined products | Long
Derivative [Line Items]
Notional contracts (in thousands of total barrels)	13,316
Refined products | Long | Spread Contracts
Derivative [Line Items]
Notional contracts (in thousands of total barrels)	778
Refined products | Short
Derivative [Line Items]
Notional contracts (in thousands of total barrels)	14,280
Refined products | Short | Spread Contracts
Derivative [Line Items]
Notional contracts (in thousands of total barrels)	836
Blending products
Derivative [Line Items]
Percentage of derivative contracts expiring in the period	80.90%
Blending products | Long
Derivative [Line Items]
Notional contracts (in thousands of total barrels)	3,694
Blending products | Short
Derivative [Line Items]
Notional contracts (in thousands of total barrels)	8,883
Soybean oil
Derivative [Line Items]
Percentage of derivative contracts expiring in the period	92.80%
Soybean oil | Long
Derivative [Line Items]
Notional contracts (in thousands of total barrels)	2,957
Soybean oil | Short
Derivative [Line Items]
Notional contracts (in thousands of total barrels)	3,479

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Derivatives (Effect of Commodity Derivative Instruments in Statements of Income) (Detail) - Commodity derivatives - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss)	$ 260	$ (140)	$ (64)	$ (388)
Sales and other operating revenues
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss)	0	(19)	0	(34)
Cost of revenues
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss)	260	(121)	(65)	(354)
Other income
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss)	$ 0	$ 0	$ 1	$ 0

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Debt (Outstanding Borrowings) (Detail) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Total debt	$ 27,101	$ 25,948
Unamortized debt issuance costs	(145)	(129)
Unamortized (discount) premium, net	(254)	(280)
Amounts due within one year	(1,064)	(571)
Total long-term debt due after one year	25,638	24,968
Marathon Petroleum Corporation:
Finance lease obligations	543	589
Total debt	6,993	7,039
Marathon Petroleum Corporation: | Senior notes
Long-term debt, gross	6,449	6,449
Marathon Petroleum Corporation: | Notes payable
Long-term debt, gross	1	1
MPLX LP:
Finance lease obligations	8	9
Total debt	20,108	18,909
MPLX LP: | Bank revolving credit facility
Long-term debt, gross	0	300
MPLX LP: | Senior notes
Long-term debt, gross	$ 20,100	$ 18,600

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Debt (MPLX Senior Notes) (Details) - Senior notes - MPLX LP: - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2022	Aug. 11, 2022	Mar. 14, 2022
4.950% senior notes due March 2052
Debt Instrument [Line Items]
Debt instrument, face amount			$ 1,500
4.950% senior notes due September 2032
Debt Instrument [Line Items]
Debt instrument, face amount		$ 1,000
3.500% senior notes due December 2022
Debt Instrument [Line Items]
Repayments of Long-Term Debt	$ 500
3.500% senior notes due December 2022 | ANDX
Debt Instrument [Line Items]
Repayments of Long-Term Debt	14
3.375% senior notes due March 2023
Debt Instrument [Line Items]
Repayments of Long-Term Debt	$ 500

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Debt (Available Capacity under our Facilities) (Details) - USD ($) $ in Millions		Sep. 30, 2022	Jul. 07, 2022
MPC bank revolving credit facility due July 2027
Debt Instrument [Line Items]
Total Capacity		$ 5,000
Outstanding Borrowings		0
Outstanding Letters of Credit		1
Available Capacity		$ 4,999
Weighted Average Interest Rate		0.00%
Maximum borrowing capacity			$ 5,000
MPC trade receivables securitization facility
Debt Instrument [Line Items]
Total Capacity	[1]	$ 100
Outstanding Borrowings		0
Outstanding Letters of Credit		100
Available Capacity		$ 0
Weighted Average Interest Rate		0.00%
Maximum borrowing capacity		$ 100
MPC trade receivables securitization facility | Purchase crude oil from Strategic Petroleum Reserve
Debt Instrument [Line Items]
Outstanding Letters of Credit		1,153
MPLX LP | MPLX bank revolving credit facility due July 2027
Debt Instrument [Line Items]
Total Capacity		2,000
Outstanding Borrowings		0
Outstanding Letters of Credit		0
Available Capacity		$ 2,000
Weighted Average Interest Rate		0.00%
Maximum borrowing capacity			$ 2,000

[1] The committed borrowing and letter of credit issuance capacity of the trade receivables securitization facility is $100 million. In addition, the facility allows for the issuance of letters of credit in excess of the committed capacity at the discretion of the issuing banks. As of September 30, 2022, letters of credit in the total amount of $1.153 billion were issued and outstanding under the facility to secure contracts awarded by the Department of Energy to purchase crude oil from the Strategic Petroleum Reserve. In July 2022, the trade receivables securitization facility was amended to, among other things, extend its term until September 29, 2023.

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Debt (MPC Bank Revolving Credit Facility) (Details) - USD ($) $ in Millions	Jul. 07, 2022	Sep. 30, 2022
MPC bank revolving credit facility due October 2023
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 5,000
MPC bank revolving credit facility due July 2027
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 5,000
Description of variable rate basis	at either the Adjusted Term SOFR or the Alternate Base Rate, both as defined in the MPC Credit Agreement, plus an applicable margin
MPC bank revolving credit facility due July 2027 | Letter of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 2,200

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Debt (MPLX Bank Revolving Credit Facility) (Details) - MPLX LP: - USD ($) $ in Millions	Jul. 07, 2022	Sep. 30, 2022
MPLX bank revolving credit facility due July 2024
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 3,500
MPLX bank revolving credit facility due July 2027
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 2,000
Description of variable rate basis	at either the Adjusted Term SOFR or the Alternate Base Rate, both as defined in the MPLX Credit Agreement, plus an applicable margin
MPLX bank revolving credit facility due July 2027 | Letter of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 150

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Revenue (Disaggregated by Product Line) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022		Sep. 30, 2021
Sales and other operating revenues		$ 45,787	$ 32,321	$ 137,640	[1]	$ 84,647	[1]
Refining & Marketing
Sales and other operating revenues	[1]	44,355	31,109	133,447		81,324
Refining & Marketing | Refined products
Sales and other operating revenues		42,090	29,257	124,547		75,594
Refining & Marketing | Crude oil
Sales and other operating revenues		1,783	1,687	7,648		4,999
Refining & Marketing | Services and other
Sales and other operating revenues		482	165	1,252		731
Midstream
Sales and other operating revenues	[1]	1,432	1,212	4,193		3,323
Midstream | Refined products
Sales and other operating revenues		617	441	1,812		1,027
Midstream | Services and other
Sales and other operating revenues		$ 815	$ 771	$ 2,381		$ 2,296

[1] Includes related party sales. See Note 7 for additional information

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Revenue (Details) $ in Millions	Sep. 30, 2022 USD ($)
Revenue from Contract with Customer [Abstract]
Matching buy/sell receivables	$ 5,920

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Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022		Sep. 30, 2021
Net cash provided by operating activities included:
Interest paid (net of amounts capitalized)	$ 837		$ 935
Net income taxes paid to (received from) taxing authorities	3,741		2,896
Non-cash investing and financing activities:
Contribution of net assets	818	[1]	0
Book value of equity method investment	$ 25	[2]	$ 0

[1] Represents the book value of property, plant and equipment, inventory and working capital contributed by MPC to Martinez Renewables LLC. See Note 14 for additional information.

[2] Represents the book value of MPC’s equity method investment in Watson Cogeneration Company at June 1, 2022 prior to MPC buying out the remaining interest in Watson Cogeneration Company. See Note 14 for additional information.

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Supplemental Cash Flow Information (Reconciliation of Additions to Property, Plant and Equipment to Total Capital Expenditures) (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Supplemental Cash Flow Elements [Abstract]
Additions to property, plant and equipment per the consolidated statements of cash flows				$ 1,694	$ 983
Increase in capital accruals				30	31
Capital expenditures	[1]	$ 734	$ 427	$ 1,724	$ 1,014

[1] Includes changes in capital expenditure accruals. See Note 20 for a reconciliation of total capital expenditures to additions to property, plant and equipment for the nine months ended September 30, 2022 and 2021 as reported in the consolidated statements of cash flows.

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Accumulated Other Comprehensive Loss (Changes in Accumulated Other Comprehensive Loss by Component) (Detail) - USD ($) $ in Millions		3 Months Ended						9 Months Ended
		Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance				$ (67)			$ (512)	$ (67)	$ (512)
Other comprehensive income (loss), before reclassifications, net of tax								(132)	112
Amounts reclassified from accumulated other comprehensive loss:
Amortization of prior service credit								(50)	(32)
Amortization of actuarial loss								8	42
Settlement loss								69	64
Other									(1)
Tax effect								(7)	(17)
Other comprehensive income (loss)		$ (114)	$ 9	(7)	$ (4)	$ 171	1	(112)	168
Ending balance		(179)			(344)			(179)	(344)
Other comprehensive income (loss) before reclassifications, tax								(44)	38
Accumulated Defined Benefit Plans Adjustment | Pension Benefits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance				(117)			(338)	(117)	(338)
Other comprehensive income (loss), before reclassifications, net of tax								(131)	115
Amounts reclassified from accumulated other comprehensive loss:
Amortization of prior service credit	[1]							(34)	(34)
Amortization of actuarial loss	[1]							4	35
Settlement loss	[1]							69	64
Tax effect								(10)	(15)
Other comprehensive income (loss)								(102)	165
Ending balance		(219)			(173)			(219)	(173)
Accumulated Defined Benefit Plans Adjustment | Other Benefits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance				49			(181)	49	(181)
Other comprehensive income (loss), before reclassifications, net of tax								2	1
Amounts reclassified from accumulated other comprehensive loss:
Amortization of prior service credit	[1]							(16)	2
Amortization of actuarial loss	[1]							4	7
Settlement loss								0	0
Tax effect								3	(2)
Other comprehensive income (loss)								(7)	8
Ending balance		42			(173)			42	(173)
Other
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance				$ 1			$ 7	1	7
Other comprehensive income (loss), before reclassifications, net of tax								(3)	(4)
Amounts reclassified from accumulated other comprehensive loss:
Other									(1)
Tax effect								0	0
Other comprehensive income (loss)								(3)	(5)
Ending balance		$ (2)			$ 2			$ (2)	$ 2

[1] These accumulated other comprehensive loss components are included in the computation of net periodic benefit cost. See Note 22.

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Pension and Other Postretirement Benefits (Components of Net Periodic Benefit Costs) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Pension Benefits
Components of net periodic benefit cost:
Service cost	$ 48	$ 73	$ 181	$ 221
Interest cost	25	23	72	69
Expected return on plan assets	(33)	(37)	(111)	(99)
Amortization of prior service cost (credit)	(11)	(11)	(34)	(34)
Amortization of actuarial (gain) loss	(3)	10	4	35
Settlement loss	13	15	69	64
Net periodic benefit cost	39	73	181	256
Other Benefits
Components of net periodic benefit cost:
Service cost	6	9	19	26
Interest cost	6	7	16	22
Amortization of prior service cost (credit)	(5)	1	(16)	2
Amortization of actuarial (gain) loss	1	2	4	7
Net periodic benefit cost	$ 8	$ 19	$ 23	$ 57

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Pension and Other Postretirement Benefits (Additional Information) (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2022 USD ($)
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 15
Other Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Benefits paid	12
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Benefits paid	$ 42

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Leases (Lease Revenues) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Operating leases:
Rental income	$ 75	$ 88	$ 268	$ 286
Sales-type leases:
Interest income (Sales-type rental revenue-fixed minimum)	19	0	19	0
Interest income (Revenue from variable lease payments)	9	0	9	0
Sales-type lease revenue	$ 28	$ 0	$ 28	$ 0

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Leases (Amount recognized on commencement date) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022		Jul. 31, 2022
Leases [Abstract]
Property, plant, and equipment, lessor asset under operating lease, after accumulated depreciation			$ 745
Deferred revenue			277
Lease receivable	$ 944	[1]	914
Unguaranteed residual asset	63		$ 63
Sales-type lease, selling profit (loss)	$ 509

[1] This amount does not include the unguaranteed residual assets.

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Leases (Sales-type Lease Receivable, Maturity) (Details) - USD ($) $ in Millions		Sep. 30, 2022		Jul. 31, 2022
Lessor, Lease, Description [Line Items]
2022		$ 53
2023		166
2024		156
2025		146
2026		136
2027 and thereafter		1,096
Total minimum future rentals		1,753
Less: present value discount		809
Lease receivable		944	[1]	$ 914
Unguaranteed residual asset		63		$ 63
Total sales-type lease assets		1,007
Accounts Receivable
Lessor, Lease, Description [Line Items]
Lease receivable	[2]	106
Other Noncurrent Assets
Lessor, Lease, Description [Line Items]
Lease receivable	[3]	$ 838

[1] This amount does not include the unguaranteed residual assets.

[2] Presented in receivables, net on the consolidated balance sheets.

[3] Presented in other noncurrent assets on the consolidated balance sheets.

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Leases (Details) $ in Millions	9 Months Ended
	Sep. 30, 2022 USD ($)
Reclassification, Other
Lessor, Lease, Description [Line Items]
Property, plant and equipment, transfers and changes	$ 3

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Commitments and Contingencies (Detail)	9 Months Ended
	Sep. 30, 2022
Pending Litigation
Loss Contingencies [Line Items]
Loss contingency, inestimable loss	For matters for which we have not recorded a liability, we are unable to estimate a range of possible loss because the issues involved have not been fully developed through pleadings, discovery or court proceedings.

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Commitments and Contingencies (Environmental Matters) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Accrued liabilities for remediation	$ 383	$ 401
Receivables for recoverable costs	$ 6	$ 6

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Commitments and Contingencies (Other Legal Proceedings) (Details) - USD ($) $ in Millions		1 Months Ended
	Dec. 15, 2020	Jul. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Loss contingency, damages sought, value		$ 187
Loss contingency, damages paid, value	$ 4

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Commitments and Contingencies (Guarantees) (Details) $ in Millions	Sep. 30, 2022 USD ($)
Other Guarantees
Loss Contingencies [Line Items]
Maximum potential undiscounted payments	$ 97
LOOP and LOCAP LLC | Guarantee of Indebtedness of Others | Financial Guarantee
Loss Contingencies [Line Items]
Maximum potential undiscounted payments	$ 171
Bakken Pipeline System
Loss Contingencies [Line Items]
Ownership percentage	9.19%
Bakken Pipeline System | Guarantee of Indebtedness of Others | Financial Guarantee
Loss Contingencies [Line Items]
Maximum potential undiscounted payments	$ 170
Crowley Ocean Partners
Loss Contingencies [Line Items]
Ownership percentage	50.00%
Crowley Ocean Partners | Guarantee of Indebtedness of Others | Financial Guarantee
Loss Contingencies [Line Items]
Maximum potential undiscounted payments	$ 98
Crowley Blue Water Partners
Loss Contingencies [Line Items]
Ownership percentage	50.00%
Crowley Blue Water Partners | Guarantee of Indebtedness of Others | Financial Guarantee
Loss Contingencies [Line Items]
Maximum potential undiscounted payments	$ 101