10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the quarterly period ended March 31, 2024.

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   001-13643

ONEOK, Inc.

(Exact name of registrant as specified in its charter)

Oklahoma	73-1520922
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

100 West Fifth Street,	Tulsa,	OK	74103
(Address of principal executive offices)			(Zip Code)

Registrant’s telephone number, including area code  (918) 588-7000

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 of $0.01	OKE	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, 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 ☒

On April 22, 2024, the Company had 583,646,909 shares of common stock outstanding.

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ONEOK, Inc.

TABLE OF CONTENTS

Part I.	Financial Information	Page No.
Item 1.	Financial Statements (Unaudited)	6
	Consolidated Statements of Income - Three Months Ended March 31, 2024 and 2023	6
	Consolidated Statements of Comprehensive Income - Three Months Ended March 31, 2024 and 2023	6
	Consolidated Balance Sheets - March 31, 2024, and December 31, 2023	7
	Consolidated Statements of Cash Flows - Three Months Ended March 31, 2024 and 2023	9
	Consolidated Statements of Changes in Equity - Three Months Ended March 31, 2024 and 2023	10
	Notes to Consolidated Financial Statements	12
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	20
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	33
Item 4.	Controls and Procedures	33
Part II.	Other Information	33
Item 1.	Legal Proceedings	33
Item 1A.	Risk Factors	33
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	34
Item 3.	Defaults Upon Senior Securities	34
Item 4.	Mine Safety Disclosures	34
Item 5.	Other Information	34
Item 6.	Exhibits	34
Signature		36

As used in this Quarterly Report, references to “we,” “our” or “us” refer to ONEOK, Inc., an Oklahoma corporation, and its predecessors and subsidiaries, unless the context indicates otherwise.

The statements in this Quarterly Report that are not historical information, including statements concerning plans and objectives of management for future operations, economic performance or related assumptions, are forward-looking statements. Forward-looking statements may include words such as “anticipates,” “believes,” “continues,” “could,” “estimates,” “expect,” “forecasts,” “goal,” “guidance,” “intends,” “may,” “might,” “outlook,” “plans,” “potential,” “projects,” “scheduled,” “should,” “target,” “will,” “would” and other words and terms of similar meaning. Although we believe that our expectations regarding future events are based on reasonable assumptions, we can give no assurance that such expectations or assumptions will be achieved. Important factors that could cause actual results to differ materially from those in the forward-looking statements are described under Part I, Item 2, Management’s Discussion and Analysis of Financial Condition and Results of Operations “Forward-Looking Statements,” and Part II, Item 1A, “Risk Factors,” in this Quarterly Report and under Part I, Item 1A, “Risk Factors,” in our Annual Report.

INFORMATION AVAILABLE ON OUR WEBSITE

We make available, free of charge, on our website (www.oneok.com) copies of our Annual Reports, Quarterly Reports, Current Reports on Form 8-K, amendments to those reports filed or furnished to the SEC pursuant to Section 13(a) or 15(d) of the Exchange Act and reports of holdings of our securities filed by our officers and directors under Section 16 of the Exchange Act as soon as reasonably practicable after filing such material electronically or otherwise furnishing it to the SEC. Copies of our Code of Business Conduct and Ethics, Corporate Governance Guidelines, Director Independence Guidelines, Corporate Sustainability Report and the written charters of our Board Committees also are available on our website, and we will provide copies of these documents upon request.

In addition to our filings with the SEC and materials posted on our website, we also use social media platforms as additional channels of distribution to reach public investors. Information contained on our website, posted on our social media accounts, and any corresponding applications, are not incorporated by reference into this report.

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GLOSSARY

The abbreviations, acronyms and industry terminology used in this Quarterly Report are defined as follows:

$2.5 Billion Credit Agreement	ONEOK’s $2.5 billion amended and restated revolving credit agreement, as amended
AFUDC	Allowance for funds used during construction
Annual Report	Annual Report on Form 10-K for the year ended December 31, 2023
ASU	Accounting Standards Update
Bbl	Barrels, 1 barrel is equivalent to 42 United States gallons
BBtu/d	Billion British thermal units per day
Bcf	Billion cubic feet
BridgeTex	BridgeTex Pipeline Company, LLC, a 30% owned joint venture
EBITDA	Earnings before interest expense, income taxes, depreciation and amortization
EPS	Earnings per share of common stock
ESG	Environmental, social and governance
Exchange Act	Securities Exchange Act of 1934, as amended
FASB	Financial Accounting Standards Board
FERC	Federal Energy Regulatory Commission
Fitch	Fitch Ratings, Inc.
GAAP	Accounting principles generally accepted in the United States of America
GHG	Greenhouse gas
GWh	Gigawatt hour
Guardian	Guardian Pipeline, L.L.C., a wholly owned subsidiary of ONEOK, Inc.
Guardian Term Loan Agreement	Guardian’s senior unsecured three-year $120 million term loan agreement dated June 2022
Intermediate Partnership	ONEOK Partners Intermediate Limited Partnership, a wholly owned subsidiary of ONEOK Partners, L.P.
Magellan	Magellan Midstream Partners, L.P., a wholly owned subsidiary of ONEOK, Inc.
Magellan Acquisition	The transaction completed on September 25, 2023, pursuant to which ONEOK acquired all of Magellan’s outstanding common units in a cash-and-stock transaction, pursuant to the Agreement and Plan of Merger of ONEOK, Otter Merger Sub, LLC and Magellan, dated May 14, 2023
MBbl/d	Thousand barrels per day
MDth/d	Thousand dekatherms per day
MMBbl	Million barrels
MMBtu	Million British thermal units
Moody’s	Moody’s Investors Service, Inc.
MVP	MVP Terminalling, LLC, a 25% owned joint venture
Natural Gas Act	Natural Gas Act of 1938, as amended
NGL(s)	Natural gas liquid(s)
Northern Border	Northern Border Pipeline Company, a 50% owned joint venture
ONEOK	ONEOK, Inc.
ONEOK Partners	ONEOK Partners, L.P., a wholly owned subsidiary of ONEOK, Inc.
OPIS	Oil Price Information Service
Overland Pass	Overland Pass Pipeline Company, LLC, a 50% owned joint venture
POP	Percent of Proceeds
Purity NGLs	Marketable natural gas liquid purity products, such as ethane, ethane/propane mix, propane, iso-butane, normal butane and natural gasoline
Quarterly Report(s)	Quarterly Report(s) on Form 10-Q

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Refined Products	The output from crude oil refineries, including products such as gasoline, diesel fuel, aviation fuel, kerosene and heating oil
Roadrunner	Roadrunner Gas Transmission, LLC, a 50% owned joint venture
S&P	S&P Global Ratings
Saddlehorn	Saddlehorn Pipeline Company, LLC, a 40% owned joint venture
SEC	Securities and Exchange Commission
Series E Preferred Stock	Series E Non-Voting, Perpetual Preferred Stock, par value $0.01 per share
Viking	Viking Gas Transmission Company, a wholly owned subsidiary of ONEOK, Inc.
Viking Term Loan Agreement	Viking’s senior unsecured three-year $60 million term loan agreement dated March 2023
XBRL	eXtensible Business Reporting Language

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PART I - FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

ONEOK, Inc. and Subsidiaries
CONSOLIDATED STATEMENTS OF INCOME
	Three Months Ended
	March 31,
(Unaudited)	2024		2023
	(Millions of dollars, except per share amounts)
Revenues
Commodity sales	$	3,928	$	4,156
Services	853		365
Total revenues (Note K)	4,781		4,521
Cost of sales and fuel (exclusive of items shown separately below)	2,897		3,347
Operations and maintenance	486		239
Depreciation and amortization	254		162
General taxes	86		57
Other operating income, net (Note C)	(6)		(781)
Operating income	1,064		1,497
Equity in net earnings from investments (Note I)	76		40
Other income, net	7		8
Interest expense (net of capitalized interest of $12 and $18, respectively)	(300)		(166)
Income before income taxes	847		1,379
Income taxes	(208)		(330)
Net income	639		1,049
Less: Preferred stock dividends	—		—
Net income available to common shareholders	$	639	$	1,049
Basic EPS (Note H)	$	1.09	$	2.34
Diluted EPS (Note H)	$	1.09	$	2.34
Average shares (millions)
Basic	584.2		448.1
Diluted	585.7		449.0

See accompanying Notes to Consolidated Financial Statements.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
	Three Months Ended
	March 31,
(Unaudited)	2024		2023
Net income	$	639	$	1,049
Other comprehensive income (loss), net of tax
Change in fair value of derivatives, net of tax of $22 and $(7), respectively	(75)		23
Derivative amounts reclassified to net income, net of tax of $6 and $3, respectively	(21)		(12)
Changes in benefit plan obligations and other, net of tax of $— and $1, respectively	1		(2)
Total other comprehensive income (loss), net of tax	(95)		9
Comprehensive income	$	544	$	1,058

See accompanying Notes to Consolidated Financial Statements.

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ONEOK, Inc. and Subsidiaries
CONSOLIDATED BALANCE SHEETS
		March 31,		December 31,
(Unaudited)		2024		2023
Assets	(Millions of dollars)
Current assets
Cash and cash equivalents		$	65	$	338
Accounts receivable, net		1,699		1,705
Materials and supplies		153		148
Inventories		798		639
Commodity imbalances		23		26
Other current assets		212		252
Total current assets		2,950		3,108
Property, plant and equipment
Property, plant and equipment		38,796		38,454
Accumulated depreciation and amortization		5,989		5,757
Net property, plant and equipment		32,807		32,697
Other assets
Investments in unconsolidated affiliates		1,939		1,874
Goodwill		5,056		4,952
Intangible assets, net		1,311		1,316
Other assets		327		319
Total other assets		8,633		8,461
Total assets		$	44,390	$	44,266
Liabilities and equity
Current liabilities
Current maturities of long-term debt (Note F)		$	1,234	$	484
Short-term borrowings (Note F)		320		—
Accounts payable		1,480		1,564
Commodity imbalances		221		244
Accrued taxes		169		215
Accrued interest		268		381
Other current liabilities		502		564
Total current liabilities		4,194		3,452
Long-term debt, excluding current maturities		20,447		21,183
Deferred credits and other liabilities
Deferred income taxes		2,745		2,594
Other deferred credits		559		553
Total deferred credits and other liabilities		3,304		3,147
Commitments and contingencies (Note J)
Equity (Note G)
Preferred stock, $0.01 par value: authorized and issued 20,000 shares at March 31, 2024, and December 31, 2023		—		—
Common stock, $0.01 par value:  authorized 1,200,000,000 shares; issued 609,713,834 shares and outstanding 583,644,277 shares at  March 31, 2024; issued 609,713,834 shares and outstanding 583,093,100 shares at December 31,  2023		6		6
Paid-in capital		16,303		16,320
Accumulated other comprehensive loss		(128)		(33)
Retained earnings		927		868
Treasury stock, at cost: 26,069,557 shares at March 31, 2024, and 26,620,734 shares at  December 31, 2023		(663)		(677)
Total equity		16,445		16,484
Total liabilities and equity		$	44,390	$	44,266

See accompanying Notes to Consolidated Financial Statements.

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ONEOK, Inc. and Subsidiaries
CONSOLIDATED STATEMENTS OF CASH FLOWS
	Three Months Ended
	March 31,
(Unaudited)	2024		2023
	(Millions of dollars)
Operating activities
Net income	$	639	$	1,049
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	254		162
Equity in net earnings from investments	(76)		(40)
Distributions received from unconsolidated affiliates	78		43
Deferred income taxes	180		285
Medford settlement gain	—		(779)
Medford settlement proceeds	—		502
Other, net	23		18
Changes in assets and liabilities:
Accounts receivable	6		329
Inventories, net of commodity imbalances	(179)		20
Accounts payable	(29)		(237)
Risk-management assets and liabilities	(144)		26
Other assets and liabilities, net	(156)		(157)
Cash provided by operating activities	596		1,221
Investing activities
Capital expenditures (less allowance for equity funds used during construction)	(512)		(289)
Purchases of and contributions to unconsolidated affiliates	(92)		(2)
Distributions received from unconsolidated affiliates in excess of cumulative earnings	25		8
Medford settlement proceeds	—		328
Other, net	1		2
Cash provided by (used in) investing activities	(578)		47
Financing activities
Dividends paid	(578)		(427)
Short-term borrowings, net	320		—
Issuance of long-term debt, net of discounts	—		50
Repayment of long-term debt	—		(425)
Other, net	(33)		(6)
Cash used in financing activities	(291)		(808)
Change in cash and cash equivalents	(273)		460
Cash and cash equivalents at beginning of period	338		220
Cash and cash equivalents at end of period	$	65	$	680

See accompanying Notes to Consolidated Financial Statements.

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ONEOK, Inc. and Subsidiaries
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
(Unaudited)	Preferred Stock Issued	Common Stock Issued	Preferred Stock		Common Stock		Paid-in Capital
	(Shares)		(Millions of dollars)
January 1, 2024	20,000	609,713,834	$	—	$	6	$	16,320
Net income	—	—	—		—		—
Other comprehensive loss	—	—	—		—		—
Preferred stock dividends - $13.75 per share (Note G)	—	—	—		—		—
Common stock issued	—	—	—		—		(8)
Common stock dividends - $0.99 per share (Note G)	—	—	—		—		—
Other, net	—	—	—		—		(9)
March 31, 2024	20,000	609,713,834	$	—	$	6	$	16,303

(Unaudited)	Preferred Stock Issued	Common Stock Issued	Preferred Stock		Common Stock		Paid-in Capital
	(Shares)		(Millions of dollars)
January 1, 2023	20,000	474,916,234	$	—	$	5	$	7,253
Net income	—	—	—		—		—
Other comprehensive income	—	—	—		—		—
Preferred stock dividends - $13.75 per share	—	—	—		—		—
Common stock issued	—	—	—		—		(3)
Common stock dividends - $0.955 per share	—	—	—		—		—
Other, net	—	—	—		—		3
March 31, 2023	20,000	474,916,234	$	—	$	5	$	7,253

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ONEOK, Inc. and Subsidiaries
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
(Continued)
(Unaudited)	Accumulated Other Comprehensive Loss		Retained Earnings		Treasury Stock		Total Equity
	(Millions of dollars)
January 1, 2024	$	(33)	$	868	$	(677)	$	16,484
Net income	—		639		—		639
Other comprehensive loss	(95)		—		—		(95)
Preferred stock dividends - $13.75 per share (Note G)	—		—		—		—
Common stock issued	—		—		14		6
Common stock dividends - $0.99 per share (Note G)	—		(579)		—		(579)
Other, net	—		(1)		—		(10)
March 31, 2024	$	(128)	$	927	$	(663)	$	16,445

(Unaudited)	Accumulated Other Comprehensive Loss		Retained Earnings		Treasury Stock		Total Equity
	(Millions of dollars)
January 1, 2023	$	(108)	$	50	$	(706)	$	6,494
Net income	—		1,049		—		1,049
Other comprehensive income	9		—		—		9
Preferred stock dividends - $13.75 per share	—		—		—		—
Common stock issued	—		—		7		4
Common stock dividends - $0.955 per share	—		(427)		—		(427)
Other, net	—		—		—		3
March 31, 2023	$	(99)	$	672	$	(699)	$	7,132

See accompanying Notes to Consolidated Financial Statements.

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ONEOK, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

A.    SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Our accompanying unaudited Consolidated Financial Statements have been prepared pursuant to the rules and regulations of the SEC. These statements have been prepared in accordance with GAAP and reflect all adjustments that, in our opinion, are necessary for a fair statement of the results for the interim periods presented. All such adjustments are of a normal recurring nature. The 2023 year-end Consolidated Balance Sheet data was derived from our audited Consolidated Financial Statements but does not include all disclosures required by GAAP. These unaudited Consolidated Financial Statements should be read in conjunction with our audited Consolidated Financial Statements in our Annual Report.

Recently Issued Accounting Standards Update - Changes to GAAP are established by the FASB in the form of ASUs to the FASB Accounting Standards Codification. We consider the applicability and impact of all ASUs. There have been no new accounting pronouncements that have become effective or have been issued that are of significance or potential significance to us during the quarter, and no material updates to recently issued standards disclosed in our Annual Report.

B.    MAGELLAN ACQUISITION

On September 25, 2023, we completed the Magellan Acquisition. The acquisition strategically diversifies our complementary asset base and allows for significant expected synergies as a combined entity. Each common unit of Magellan was exchanged for a fixed ratio of 0.667 shares of ONEOK common stock and $25.00 of cash, for a total consideration of $14.1 billion. A total of approximately 135 million shares of common stock were issued, with a fair value of approximately $9.0 billion as of the closing date of the Magellan Acquisition. We funded the cash portion of the acquisition with an underwritten public offering of $5.25 billion senior unsecured notes. For additional information on our long-term debt, please see Note H in our Annual Report.

The Magellan Acquisition was accounted for using the acquisition method of accounting for business combinations pursuant to Accounting Standards Codification 805, “Business Combinations,” which requires, among other things, assets acquired and liabilities assumed to be recorded at their fair values on the acquisition date. Determining the fair value of acquired assets and liabilities assumed requires management’s judgment and the use of independent valuation specialists. During the three months ended March 31, 2024, there have been no material changes to the preliminary purchase price allocation disclosed in our Annual Report.

C.    MEDFORD INCIDENT

In 2022, a fire occurred at our 210 MBbl/d Medford, Oklahoma, natural gas liquids fractionation facility. In the first quarter of 2023, we reached an agreement with our insurers to settle all claims for physical damage and business interruption related to the Medford incident. Under the terms of the settlement agreement, we agreed to resolve the claims for total insurance payments of $930 million, $100 million of which was received in 2022. The remaining $830 million was received in the first quarter of 2023. The proceeds serve as settlement for property damage, business interruption claims to the date of the settlement and as payment in lieu of future business interruption insurance claims. We applied the $830 million received to our outstanding insurance receivable at December 31, 2022, of $51 million, and recorded an operational gain for the remaining $779 million in other operating income, net, within the Consolidated Statement of Income. We classified proceeds received within the Consolidated Statement of Cash Flows based on our assessment of the nature of the loss (property and business interruption) included in the settlement.

D.    FAIR VALUE MEASUREMENTS

Determining Fair Value - For our fair value measurements, we utilize market prices, third-party pricing services, present value methods and standard option valuation models to determine the price we would receive from the sale of an asset or the transfer of a liability in an orderly transaction at the measurement date. We measure the fair value of a group of financial assets and liabilities consistent with how a market participant would price the net risk exposure at the measurement date. Determining the appropriate classification of our fair value measurements within the fair value hierarchy requires management’s judgment regarding the degree to which market data is observable or corroborated by observable market data. We categorize derivatives based on the lowest level input that is significant to the fair value measurement in its entirety. Our valuation techniques and inputs are consistent with those discussed in Note A of the Notes to Consolidated Financial Statements in our Annual Report.

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Recurring Fair Value Measurements - The following tables set forth our recurring fair value measurements as of the dates indicated:

	March 31, 2024
	Level 1		Level 2		Level 3		Total - Gross		Netting (a)		Total - Net
	(Millions of dollars)
Derivative assets
Commodity contracts	$	58	$	57	$	—	$	115	$	(114)	$	1
Total derivative assets	$	58	$	57	$	—	$	115	$	(114)	$	1
Derivative liabilities
Commodity contracts	$	(94)	$	(83)	$	—	$	(177)	$	177	$	—
Total derivative liabilities	$	(94)	$	(83)	$	—	$	(177)	$	177	$	—

(a) - Derivative assets and liabilities are presented in our Consolidated Balance Sheet on a net basis. We net derivative assets and liabilities when a legally enforceable master-netting arrangement exists between the counterparty to a derivative contract and us. At March 31, 2024, we held no cash and posted cash of $129 million with various counterparties, including $63 million of cash collateral that is offsetting derivative net liability positions under master-netting arrangements in the table above. The remaining $66 million of cash collateral in excess of derivative net liability positions is included in other current assets in our Consolidated Balance Sheet.

	December 31, 2023
	Level 1		Level 2		Level 3		Total - Gross		Netting (a)		Total - Net
	(Millions of dollars)
Derivative assets
Commodity contracts	$	109	$	68	$	—	$	177	$	(125)	$	52
Total derivative assets	$	109	$	68	$	—	$	177	$	(125)	$	52
Derivative liabilities
Commodity contracts	$	(40)	$	(44)	$	—	$	(84)	$	84	$	—
Total derivative liabilities	$	(40)	$	(44)	$	—	$	(84)	$	84	$	—

(a) - Derivative assets and liabilities are presented in our Consolidated Balance Sheet on a net basis. We net derivative assets and liabilities when a legally enforceable master-netting arrangement exists between the counterparty to a derivative contract and us. At December 31, 2023, we posted no cash and held cash of $41 million with various counterparties, which offsets our derivative net asset position under master netting arrangements as shown in the table above.

Other Financial Instruments - The approximate fair value of cash and cash equivalents, accounts receivable, accounts payable and short-term borrowings is equal to book value due to the short-term nature of these items. Our cash and cash equivalents are composed of bank and money market accounts and are classified as Level 1. Our short-term borrowings are classified as Level 2 since the estimated fair value of the short-term borrowings can be determined using information available in the commercial paper market. We have investments associated with our supplemental executive retirement plan and nonqualified deferred compensation plan that are carried at fair value and primarily are composed of mutual funds, municipal bonds and other fixed income securities classified as Level 1 and Level 2.

The estimated fair value of our consolidated long-term debt, including current maturities, was $21.0 billion and $21.4 billion at March 31, 2024, and December 31, 2023, respectively. The book value of our consolidated long-term debt, including current maturities, was $21.7 billion at March 31, 2024, and December 31, 2023. The estimated fair value of the aggregate senior notes outstanding was determined using quoted market prices for similar issues with similar terms and maturities. The estimated fair value of our consolidated long-term debt is classified as Level 2.

E.    RISK-MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES

Risk-management Activities - We are sensitive to changes in natural gas, NGLs, Refined Products and crude oil prices, principally as a result of contractual terms under which these commodities are processed, purchased and sold. We are also subject to the risk of interest-rate fluctuation in the normal course of business. We use physical-forward purchases and sales and financial derivatives to secure a certain price for a portion of our natural gas, NGLs, Refined Products, condensate and crude oil purchases and sales; to reduce our exposure to commodity price and interest-rate fluctuations; and to achieve more predictable cash flows. Additionally, we may use physical-forward purchases and financial derivatives to reduce commodity price risk associated with power and natural gas used to operate our facilities. We follow established policies and procedures to assess risk and approve, monitor and report our risk-management activities. We have not used these instruments for trading purposes.

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Commodity price risk - Commodity price risk refers to the risk of loss in cash flows and future earnings arising from adverse changes in the price of natural gas, NGLs, Refined Products and crude oil. We may use commodity derivative instruments to reduce the near-term commodity price risk associated with a portion of our forecasted purchases and sales of commodities. Our exposure to commodity price risk is consistent with that discussed in our Annual Report.

Interest-rate risk - We may manage interest-rate risk through the use of fixed-rate debt, floating-rate debt, Treasury locks and interest-rate swaps. At both March 31, 2024, and December 31, 2023, we had no outstanding Treasury lock agreements or interest rate swaps.

Fair Values of Derivative Instruments - The following table sets forth the fair values of our derivative instruments presented on a gross basis as of the dates indicated:

		March 31, 2024				December 31, 2023
	Location in our Consolidated Balance Sheets	Assets		(Liabilities)		Assets		(Liabilities)
Derivatives designated as hedging instruments		(Millions of dollars)
Commodity contracts (a)(b)	Other current assets	$	103	$	(164)	$	163	$	(78)
Total derivatives designated as hedging instruments		103		(164)		163		(78)
Derivatives not designated as hedging instruments
Commodity contracts (a)(b)	Other current assets	12		(13)		14		(6)
Total derivatives not designated as hedging instruments		12		(13)		14		(6)
Total derivatives		$	115	$	(177)	$	177	$	(84)

(a) - Derivative assets and liabilities are presented in our Consolidated Balance Sheets on a net basis when a legally enforceable master-netting arrangement exists between the counterparty to a derivative contract and us.

(b) - At March 31, 2024, our derivative net liability positions under master-netting arrangements for financial commodity contracts were offset by cash collateral of $63 million.

Notional Quantities for Derivative Instruments - The following table sets forth the notional quantities for derivative instruments held as of the dates indicated:

		March 31, 2024	December 31, 2023
	Contract Type	Net Purchased/Payor (Sold/Receiver)
Derivatives designated as hedging instruments:
Cash flow hedges
Fixed price
- Natural gas (Bcf)	Futures and swaps	(17.4)	(16.0)
- NGLs, Refined Products and crude oil (MMBbl)	Futures and swaps	(16.0)	(14.5)
- Power (GWh)	Futures and swaps	22.1	22.1
Basis
- Natural gas (Bcf)	Futures and swaps	(17.2)	(16.0)
Derivatives not designated as hedging instruments:
Fixed price
- Natural gas (Bcf)	Futures and swaps	—	(0.7)
- NGLs, Refined Products and crude oil (MMBbl)	Futures and swaps	(0.6)	0.1
Basis
- Natural gas (Bcf)	Futures and swaps	—	(0.7)
- NGLs, Refined Products, and crude oil (MMBbl)	Futures and swaps	(1.4)	(0.1)

Cash Flow Hedges - During the three months ended March 31, 2024, we have not had material cash flow hedge activity on our commodity derivative instruments.

Credit Risk - We monitor the creditworthiness of our counterparties and compliance with policies and limits established by our Risk Oversight and Strategy Committee. We maintain credit policies with regard to our counterparties that we believe minimize credit risk. Our policies and related credit risk are consistent with those discussed in our Annual Report.

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F.    DEBT

Current Maturities - At March 31, 2024, our current maturities of long-term debt of $1.2 billion consist of $484 million, 2.75% senior notes due September 2024; $250 million, 3.2% senior notes due March 2025; and $500 million, 4.9% senior notes due March 2025.

Commercial Paper Program - At March 31, 2024, we had $320 million of commercial paper outstanding, bearing a weighted-average interest rate of 5.50%. At December 31, 2023, we had no commercial paper outstanding.

$2.5 Billion Credit Agreement - Our $2.5 Billion Credit Agreement, which expires in 2027, is a revolving credit facility and contains certain customary conditions for borrowing, as well as customary financial, affirmative and negative covenants. Among other things, these covenants include maintaining a ratio of consolidated net indebtedness to adjusted EBITDA (EBITDA, as defined in our $2.5 Billion Credit Agreement, adjusted for all noncash charges and increased for projected EBITDA from certain lender-approved capital expansion projects). In addition, adjusted EBITDA as defined in our $2.5 Billion Credit Agreement allows inclusion of the trailing 12 months of consolidated adjusted EBITDA of the acquired business. In March 2024, we acquired additional ownership interest in one of our unconsolidated affiliates, which allowed us to elect an acquisition adjustment period under our $2.5 Billion Credit Agreement and, as a result, increased our leverage ratio covenant to 5.5 to 1 until the quarter ended December 31, 2024, when it will decrease to 5.0 to 1. As of March 31, 2024, we had no outstanding borrowings, our ratio of consolidated indebtedness to adjusted EBITDA was 4.1 to 1, and we were in compliance with all covenants under our $2.5 Billion Credit Agreement.

Debt Guarantees - ONEOK, ONEOK Partners, the Intermediate Partnership and Magellan have cross guarantees in place for ONEOK’s and ONEOK Partners’ indebtedness. The Guardian Term Loan Agreement and Viking Term Loan Agreement are not guaranteed by ONEOK, ONEOK Partners, the Intermediate Partnership or Magellan. For further details on our indebtedness, see Note H of the Notes to Consolidated Financial Statements in our Annual Report.

G.    EQUITY

Dividends - Holders of our common stock share equally in any dividend declared by our Board of Directors, subject to the rights of the holders of outstanding Series E Preferred Stock. Dividends paid on our common stock in February 2024 were 99 cents per share. A common stock dividend of 99 cents per share was declared for shareholders of record at the close of business on May 1, 2024, payable May 15, 2024.

Our Series E Preferred Stock pays quarterly dividends on each share of Series E Preferred Stock when, and if, declared by our Board of Directors, at a rate of 5.5% per year. We paid dividends for the Series E Preferred Stock of $0.3 million in February 2024. Dividends totaling $0.3 million were declared for the Series E Preferred Stock and are payable May 15, 2024.

H.    EARNINGS PER SHARE

The following tables set forth the computation of basic and diluted EPS for the periods indicated:

	Three Months Ended March 31, 2024
	Income		Shares	Per Share Amount
	(Millions, except per share amounts)
Basic EPS
Net income available for common stock	$	639	584.2	$	1.09
Diluted EPS
Effect of dilutive securities	—		1.5
Net income available for common stock and common stock equivalents	$	639	585.7	$	1.09

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	Three Months Ended March 31, 2023
	Income		Shares	Per Share Amount
	(Millions, except per share amounts)
Basic EPS
Net income available for common stock	$	1,049	448.1	$	2.34
Diluted EPS
Effect of dilutive securities	—		0.9
Net income available for common stock and common stock equivalents	$	1,049	449.0	$	2.34

I.    UNCONSOLIDATED AFFILIATES

Equity in Net Earnings from Investments - The following table sets forth our equity in net earnings from investments for the periods indicated:

	Three Months Ended
	March 31,
	2024		2023
	(Millions of dollars)
Northern Border	$	25	$	24
Overland Pass	15		9
Roadrunner	11		7
Saddlehorn	10		—
BridgeTex	7		—
MVP	4		—
Other	4		—
Equity in net earnings from investments	$	76	$	40

In March 2024, we purchased an additional 10% interest in Saddlehorn, resulting in a 40% ownership interest at March 31, 2024.

We incurred expenses in transactions with unconsolidated affiliates of $39 million and $28 million for the three months ended March 31, 2024 and 2023, respectively, related primarily to Overland Pass and Northern Border. Revenue earned and accounts receivable from, and accounts payable to, our unconsolidated affiliates were not material.

We are the operator of Roadrunner, BridgeTex, MVP and Saddlehorn. In each case, we have operating agreements that provide for reimbursement or payment to us for management services and certain operating costs. Reimbursements and payments included in operating income in our Consolidated Statements of Income for all periods presented were not material.

J.    COMMITMENTS AND CONTINGENCIES

Regulatory, Environmental and Safety Matters - The operation of pipelines, terminals, plants and other facilities for the gathering, processing, fractionation, transportation and storage of products is subject to numerous and complex laws and regulations pertaining to health, safety and the environment. As an owner and/or operator of these facilities, we must comply with laws and regulations that relate to air and water quality, hazardous and solid waste management and disposal, cultural resource protection and other environmental and safety matters. The cost of planning, designing, constructing and operating pipelines, terminals, plants and other facilities must incorporate compliance with these laws, regulations and safety standards. Failure to comply with these laws and regulations may trigger a variety of administrative, civil and potentially criminal enforcement measures, including citizen suits, which can include the assessment of monetary penalties, the imposition of remedial requirements and the issuance of injunctions or restrictions on operation or construction. Management does not believe that, based on currently known information, a material risk of noncompliance with these laws and regulations exists that will affect adversely our consolidated results of operations, financial condition or cash flows.

Legal Proceedings - Corpus Christi Terminal Personal Injury Proceeding - Ismael Garcia, Andrew Ramirez and Jesus Juarez Quintero, et al. brought personal injury cases against Magellan and co-defendants Triton Industrial Services, LLC, Tidal Tank, Inc. and Cleveland Integrity Services, Inc. in Nueces County Court in Texas. The claims were originally brought in three different actions but were consolidated into a single case on March 2, 2021. Claims were asserted by or on behalf of seven

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individuals, and certain beneficiaries, who were employed by a contractor and working at a Magellan facility. These individuals were injured, one fatally, as a result of a fire that occurred on December 5, 2020, while they were cleaning a tank at our Corpus Christi terminal. During the first quarter of 2024, we reached settlement with all remaining claimants. We recorded accruals that represent the settlement, as well as offsetting insurance receivables for the amounts accrued.

We are a party to various other legal proceedings that have arisen in the normal course of our operations. While the results of these proceedings cannot be predicted with certainty, we believe the reasonably possible losses from such proceedings, individually and in the aggregate, are not material. Additionally, we believe the probable final outcome of such proceedings will not have a material adverse effect on our consolidated results of operations, financial position or cash flows.

K.    REVENUES

Contract Assets and Contract Liabilities - Our contract asset balances at the beginning and the end of the period primarily relate to our firm service transportation contracts with tiered rates, which are not material. The following table sets forth the balances in contract liabilities for the periods indicated:

Contract Liabilities	(Millions of dollars)
Balance at December 31, 2023 (a)	$	150
Revenue recognized included in beginning balance	(109)
Net additions	98
Balance at March 31, 2024 (b)	$	139

(a) - Contract liabilities of $104 million and $46 million are included in other current liabilities and other deferred credits, respectively, in our Consolidated Balance Sheet.

(b) - Contract liabilities of $99 million and $40 million are included in the other current liabilities and other deferred credits, respectively in our Consolidated Balance Sheet.

Receivables from Customers and Revenue Disaggregation - Excluding the insurance receivable related to the legal proceeding described in Note J, substantially all of the balances in accounts receivable on our Consolidated Balance Sheets at March 31, 2024, and December 31, 2023, relate to customer receivables. Revenue sources are disaggregated in Note L.

Unsatisfied Performance Obligations - We do not disclose the value of unsatisfied performance obligations for (i) contracts with an original expected length of one year or less and (ii) variable consideration on contracts for which we recognize revenue at the amount to which we have the right to invoice for services performed.

The following table presents aggregate value allocated to unsatisfied performance obligations as of March 31, 2024, and the amounts we expect to recognize in revenue in future periods, related primarily to firm transportation and storage contracts with remaining contract terms ranging from one month to 20 years:

Expected Period of Recognition in Revenue	(Millions of dollars)
Remainder of 2024	$	924
2025	986
2026	832
2027	735
2028 and beyond	2,192
Total	$	5,669

The table above excludes variable consideration allocated entirely to wholly unsatisfied performance obligations, wholly unsatisfied promises to transfer distinct goods or services that are part of a single performance obligation and consideration we determine to be fully constrained. The amounts we determined to be fully constrained relate to future sales obligations under long-term sales contracts where the value is not known and minimum volume agreements, which we consider to be fully constrained until invoiced.

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L.    SEGMENTS

Segment Descriptions - Our operations are divided into four reportable business segments as follows:

•    our Natural Gas Gathering and Processing segment gathers, treats, processes and markets natural gas;

•    our Natural Gas Liquids segment gathers, treats, fractionates and transports NGLs and stores, markets and distributes Purity NGLs;

•    our Natural Gas Pipelines segment transports and stores natural gas; and

•    our Refined Products and Crude segment transports, stores, distributes, blends and markets Refined Products and crude oil.

Other and eliminations consist of corporate costs, the operating and leasing activities of our headquarters building and related parking facility, the activity of our wholly owned captive insurance company and eliminations necessary to reconcile our reportable segments to our Consolidated Financial Statements.

Operating Segment Information - The following tables set forth certain selected financial information for our operating segments for the periods indicated:

Three Months Ended March 31, 2024	Natural Gas Gathering and Processing		Natural Gas Liquids		Natural Gas Pipelines		Refined Products and Crude		Total Segments
	(Millions of dollars)
Liquids commodity sales	$	623	$	3,264	$	—	$	351	$	4,238
Residue natural gas sales	344		—		28		—		372
Gathering, processing and exchange services revenue	35		122		—		—		157
Transportation and storage revenue	—		48		157		466		671
Other	8		2		—		27		37
Total revenues (a)	1,010		3,436		185		844		5,475
Cost of sales and fuel (exclusive of depreciation and operating costs)	(594)		(2,698)		(15)		(285)		(3,592)
Operating costs	(117)		(181)		(53)		(217)		(568)
Adjusted EBITDA from unconsolidated affiliates	2		17		47		35		101
Noncash compensation expense and other	5		14		1		4		24
Segment adjusted EBITDA	$	306	$	588	$	165	$	381	$	1,440
Depreciation and amortization	$	(70)	$	(85)	$	(18)	$	(80)	$	(253)
Equity in net earnings from investments	$	2	$	15	$	36	$	23	$	76
Investments in unconsolidated affiliates	$	25	$	414	$	522	$	976	$	1,937
Total assets	$	7,021	$	15,279	$	2,635	$	19,401	$	44,336
Capital expenditures	$	116	$	253	$	79	$	42	$	490

(a) - Intersegment revenues are primarily from commodity sales, which are based on the contracted selling price that is generally index-based and settled monthly. Intersegment revenues for the Natural Gas Gathering and Processing segment totaled $620 million and were not material for the Natural Gas Liquids, Refined Products and Crude and Natural Gas Pipelines segments.

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Three Months Ended March 31, 2024	Total Segments		Other and Eliminations		Total
	(Millions of dollars)
Reconciliations of total segments to consolidated
Liquids commodity sales	$	4,238	$	(682)	$	3,556
Residue natural gas sales	372		—		372
Gathering, processing and exchange services revenue	157		—		157
Transportation and storage revenue	671		(7)		664
Other	37		(5)		32
Total revenues (a)	$	5,475	$	(694)	$	4,781
Cost of sales and fuel (exclusive of depreciation and operating costs)	$	(3,592)	$	695	$	(2,897)
Operating costs	$	(568)	$	(4)	$	(572)
Depreciation and amortization	$	(253)	$	(1)	$	(254)
Equity in net earnings from investments	$	76	$	—	$	76
Investments in unconsolidated affiliates	$	1,937	$	2	$	1,939
Total assets	$	44,336	$	54	$	44,390
Capital expenditures	$	490	$	22	$	512

(a) - Substantially all of our revenues relate to contracts with customers.

Three Months Ended March 31, 2023	Natural Gas Gathering and Processing		Natural Gas Liquids		Natural Gas Pipelines		Total Segments
	(Millions of dollars)
NGL and condensate sales	$	644	$	3,551	$	—	$	4,195
Residue natural gas sales	568		—		25		593
Gathering, processing and exchange services revenue	38		131		—		169
Transportation and storage revenue	—		50		145		195
Other	8		3		1		12
Total revenues (a)	1,258		3,735		171		5,164
Cost of sales and fuel (exclusive of depreciation and operating costs)	(875)		(3,095)		(14)		(3,984)
Operating costs	(105)		(152)		(45)		(302)
Adjusted EBITDA from unconsolidated affiliates (b)	1		11		44		56
Noncash compensation expense	4		6		2		12
Other	2		778		—		780
Segment adjusted EBITDA (b)	$	285	$	1,283	$	158	$	1,726
Depreciation and amortization	$	(67)	$	(78)	$	(17)	$	(162)
Equity in net earnings from investments	$	—	$	9	$	31	$	40
Investments in unconsolidated affiliates	$	26	$	413	$	349	$	788
Total assets	$	6,899	$	14,437	$	2,239	$	23,575
Capital expenditures	$	98	$	137	$	46	$	281

(a) - Intersegment revenues are primarily from commodity sales, which are based on the contracted selling price that is generally index-based and settled monthly. Intersegment revenues for the Natural Gas Gathering and Processing segment totaled $631 million and were not material for the Natural Gas Liquids and Natural Gas Pipelines segments.

(b) - Beginning in 2023, we updated our calculation methodology of adjusted EBITDA to include adjusted EBITDA from our unconsolidated affiliates using the same recognition and measurement methods used to record equity in net earnings from investments. This change resulted in an additional $16 million of adjusted EBITDA in the first quarter of 2023.

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Three Months Ended March 31, 2023	Total Segments		Other and Eliminations		Total
	(Millions of dollars)
Reconciliations of total segments to consolidated
NGL and condensate sales	$	4,195	$	(634)	$	3,561
Residue natural gas sales	593		—		593
Gathering, processing and exchange services revenue	169		—		169
Transportation and storage revenue	195		(2)		193
Other	12		(7)		5
Total revenues (a)	$	5,164	$	(643)	$	4,521
Cost of sales and fuel (exclusive of depreciation and operating costs)	$	(3,984)	$	637	$	(3,347)
Operating costs	$	(302)	$	6	$	(296)
Depreciation and amortization	$	(162)	$	—	$	(162)
Equity in net earnings from investments	$	40	$	—	$	40
Investments in unconsolidated affiliates	$	788	$	1	$	789
Total assets	$	23,575	$	889	$	24,464
Capital expenditures	$	281	$	8	$	289

(a) - Substantially all of our revenues relate to contracts with customers.

	Three Months Ended March 31,
	2024		2023
Reconciliation of net income to total segment adjusted EBITDA	(Millions of dollars)
Net income	$	639	$	1,049
Interest expense, net of capitalized interest	300		166
Depreciation and amortization	254		162
Income taxes	208		330
Adjusted EBITDA from unconsolidated affiliates (b)	101		56
Equity in net earnings from investments (b)	(76)		(40)
Noncash compensation expense and other	15		10
Other corporate costs	(1)		(7)
Total segment adjusted EBITDA (a)(b)	$	1,440	$	1,726

(a) - The three months ended March 31, 2023, includes $733 million related to the Medford incident, including a settlement gain of $779 million, offset partially by $46 million of third-party fractionation costs.

(b) - Beginning in 2023, we updated our calculation methodology of adjusted EBITDA to include adjusted EBITDA from our unconsolidated affiliates using the same recognition and measurement methods used to record equity in net earnings from investments. This change resulted in an additional $16 million of adjusted EBITDA in the first quarter of 2023.

ITEM 2.MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion and analysis should be read in conjunction with our unaudited Consolidated Financial Statements and the Notes to Consolidated Financial Statements in this Quarterly Report, as well as our Annual Report.

RECENT DEVELOPMENTS

Please refer to the “Financial Results and Operating Information” and “Liquidity and Capital Resources” sections of Management’s Discussion and Analysis of Financial Condition and Results of Operations in this Quarterly Report for additional information.

Market Conditions and Business Update - We experienced stable volumes across our system in the first quarter of 2024, compared with the first quarter of 2023, despite the impact of winter weather in the first quarter of 2024. With the addition of our Refined Products and Crude segment due to the Magellan Acquisition, our extensive and integrated assets are located in, and connected with, some of the most productive shale basins, as well as refineries and demand centers, in the United States. Although the energy industry has experienced many commodity cycles, we have positioned ourselves to reduce exposure to direct commodity price volatility. Each of our four reportable segments are primarily fee-based, and we expect our consolidated earnings to be more than 85% fee-based in 2024.

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Natural Gas - In our Natural Gas Gathering and Processing segment, processed volumes increased in the first quarter of 2024, compared with the first quarter of 2023, due primarily to increased production in the Rocky Mountain region.

In our Natural Gas Pipelines segment, transportation services increased in the first quarter of 2024, compared with the first quarter of 2023, due primarily to higher firm and interruptible rates.

NGLs - In our Natural Gas Liquids segment, volumes decreased in the first quarter of 2024, compared with the first quarter of 2023, due primarily to lower ethane recovery and the impact of winter weather in the first quarter of 2024, offset partially by increased production in the Rocky Mountain region.

In addition to construction of our MB-6 fractionator, activities are underway to complete the looping of the West Texas NGL pipeline, which will more than double our NGL capacity out of the Permian Basin. This project is driven by our contracting success in the Permian Basin, and the full loop is expected to be in service in the first quarter of 2025. We are also expanding the capacity of the Elk Creek pipeline to 435 MBbl/d to provide for growing volumes in the Rocky Mountain region, which will bring our total pipeline capacity out of the Rocky Mountain region to 575 MBbl/d. The Elk Creek pipeline expansion is expected to be in service in the first quarter of 2025.

Refined Products and Crude - Our first quarter 2024 results benefited from continued demand for transportation and storage services on our Refined Products and crude oil systems. Liquids blending has remained strong due to favorable commodity market conditions.

At the end of the first quarter of 2024, we completed the expansion of our Refined Products pipeline to El Paso, Texas. This expansion connects more supply to growing markets in Texas, New Mexico, Arizona and Mexico, and the majority of the capital associated with this expansion is supported by volume commitments.

Ethane Economics - Price differentials between ethane and natural gas can cause natural gas processors to recover ethane or leave it in the natural gas stream, known as ethane rejection. As a result of these ethane economics, ethane volumes on our system can fluctuate. Ethane volumes under long-term contracts delivered to our NGL system decreased 15 MBbl/d to an average of 415 MBbl/d during the first quarter of 2024, compared with an average of 430 MBbl/d in the first quarter of 2023, due to changes in ethane extraction economics and the impact of weather. We estimate that there are approximately 250 MBbl/d of discretionary ethane, consisting of approximately 150 MBbl/d in the Rocky Mountain region and approximately 100 MBbl/d in the Mid-Continent region, that could be recovered and transported on our system.

Capital Projects - Our primary capital projects are outlined in the table below:

Project	Scope	Approximate Cost (a)	Completion
Natural Gas Liquids		(In millions)
MB-6 fractionator	125 MBbl/d NGL fractionator in Mont Belvieu, Texas	$550	First Quarter 2025
West Texas NGL pipeline expansion	Increase capacity to 740 MBbl/d in the Permian Basin	$520	First Quarter 2025
Elk Creek pipeline expansion	Increase capacity to 435 MBbl/d out of the Rocky Mountain region	$355	First Quarter 2025

(a) - Excludes capitalized interest/AFUDC.

For a discussion of our capital expenditure financing, see “Capital Expenditures” in the “Liquidity and Capital Resources” section.

Share Repurchase Program - In January 2024, our Board of Directors authorized a share repurchase program to buy up to $2.0 billion of our outstanding common stock and targets the program to be largely utilized over the next four years. We expect shares to be acquired from time to time in open-market transactions or through privately negotiated transactions at our discretion, subject to market conditions and other factors. We expect any purchases to be funded by cash on hand, cash flow from operations and short-term borrowings. The program will terminate upon completion of the repurchase of $2.0 billion of common stock or on January 1, 2029, whichever occurs first. As of April 22, 2024, no shares have been repurchased under the program.

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Dividends - In February 2024, we paid a quarterly common stock dividend of 99 cents per share ($3.96 per share on an annualized basis), an increase of 3.7% compared with the same quarter in the prior year. Our dividend growth is due primarily to the increase in cash flows resulting from the growth of our operations. We declared a quarterly common stock dividend of 99 cents per share ($3.96 per share on an annualized basis) in April 2024. The quarterly common stock dividend will be paid May 15, 2024, to shareholders of record at the close of business on May 1, 2024.

FINANCIAL RESULTS AND OPERATING INFORMATION

How We Evaluate Our Operations

Management uses a variety of financial and operating metrics to analyze our performance. Our consolidated financial metrics include: (1) operating income; (2) net income; (3) diluted EPS; and (4) adjusted EBITDA. We evaluate segment operating results using adjusted EBITDA and our operating metrics, which include various volume and rate statistics that are relevant for the respective segment. These operating metrics allow investors to analyze the various components of segment financial results in terms of volumes and rate/price. Management uses these metrics to analyze historical segment financial results and as the key inputs for forecasting and budgeting segment financial results. See reconciliation of net income to adjusted EBITDA in the “Non-GAAP Financial Measures” subsection. For additional information on our operating metrics, see the respective segment subsections of this “Financial Results and Operating Information” section.

Non-GAAP Financial Measures - Adjusted EBITDA is a non-GAAP measure of our financial performance. Adjusted EBITDA is defined as net income adjusted for interest expense, depreciation and amortization, noncash impairment charges, income taxes, noncash compensation expense and certain other noncash items. Following the Magellan Acquisition, we performed a review of our calculation methodology of adjusted EBITDA, and beginning in 2023, we updated our calculation to include the adjusted EBITDA related to our unconsolidated affiliates using the same recognition and measurement methods used to record equity in net earnings from investments. Adjusted EBITDA from our unconsolidated affiliates is calculated consistently with the definition above and excludes items such as interest, depreciation, income taxes and other noncash items. Although the amounts related to our unconsolidated affiliates are included in the calculation of adjusted EBITDA, such inclusion should not be understood to imply that we have control over the operations and resulting revenues, expenses or cash flows of such unconsolidated affiliates.

We believe this non-GAAP financial measure is useful to investors because it and similar measures are used by many companies in our industry as a measurement of financial performance and is commonly employed by financial analysts and others to evaluate our financial performance and to compare financial performance among companies in our industry. Adjusted EBITDA should not be considered an alternative to net income, EPS or any other measure of financial performance presented in accordance with GAAP. Additionally, this calculation may not be comparable with similarly titled measures of other companies.

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Consolidated Operations

Selected Financial Results - The following table sets forth certain selected financial results for the periods indicated:

	Three Months Ended				Three Months
	March 31,				2024 vs. 2023
Financial Results	2024		2023		$ Increase (Decrease)
	(Millions of dollars, except per share amounts)
Revenues
Commodity sales	$	3,928	$	4,156	(228)
Services	853		365		488
Total revenues	4,781		4,521		260
Cost of sales and fuel (exclusive of items shown separately below)	2,897		3,347		(450)
Operating costs	572		296		276
Depreciation and amortization	254		162		92
Other operating income, net	(6)		(781)		(775)
Operating income	$	1,064	$	1,497	(433)
Equity in net earnings from investments	$	76	$	40	36
Interest expense, net of capitalized interest	$	(300)	$	(166)	134
Net income	$	639	$	1,049	(410)
Diluted EPS	$	1.09	$	2.34	(1.25)
Adjusted EBITDA (a)	$	1,441	$	1,733	(292)
Capital expenditures	$	512	$	289	223

(a) - Beginning in 2023, we updated our calculation methodology of adjusted EBITDA to include adjusted EBITDA from our unconsolidated affiliates using the same recognition and measurement methods used to record equity in net earnings from investments. This change resulted in an additional $16 million of adjusted EBITDA in the first quarter of 2023.

Changes in commodity prices and sales volumes affect both revenues and cost of sales and fuel in our Consolidated Statements of Income and, therefore, the impact is largely offset between these line items.

Operating income decreased $433 million for the three months ended March 31, 2024, compared with the same period in 2023, primarily as a result of the following:

•Natural Gas Gathering and Processing - an increase of $15 million due primarily to higher volumes in the Rocky Mountain region, offset partially by higher operating costs; offset by

•Natural Gas Liquids - a decrease of $710 million due primarily to an insurance settlement gain in 2023 related to the Medford incident and higher operating costs, offset partially by an increase in exchange services due primarily to higher volumes in the Rocky Mountain region; offset by

•Natural Gas Pipelines - an increase of $3 million due primarily to higher transportation services, offset partially by higher operating costs; and

•Refined Products and Crude - contributed $262 million to operating income for the three months ended March 31, 2024, due to the impact of the Magellan Acquisition. We began allocating corporate costs to this segment in the first quarter of 2024, which reduced allocations to the other segments.

Net income and diluted EPS decreased for the three months ended March 31, 2024, compared with the same period in 2023, due primarily to the items discussed above and higher interest expense from higher debt balances resulting from the Magellan Acquisition, offset partially by lower income taxes and higher equity in net earnings from investments.

Capital expenditures increased for the three months ended March 31, 2024, compared with the same period in 2023, due primarily to our capital projects, including our MB-6 fractionator and NGL pipeline expansion projects.

Additional information regarding our financial results and operating information is provided in the following discussion for each of our segments.

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Natural Gas Gathering and Processing

Selected Financial Results and Operating Information - The following tables set forth certain selected financial results and operating information for our Natural Gas Gathering and Processing segment for the periods indicated:

	Three Months Ended				Three Months
	March 31,				2024 vs. 2023
Financial Results	2024		2023		$ Increase (Decrease)
	(Millions of dollars)
NGL and condensate sales	$	623	$	644	(21)
Residue natural gas sales	344		568		(224)
Gathering, compression, dehydration and processing fees and other revenue	43		46		(3)
Cost of sales and fuel (exclusive of depreciation and operating costs)	(594)		(875)		(281)
Operating costs, excluding noncash compensation adjustments	(113)		(101)		12
Adjusted EBITDA from unconsolidated affiliates (a)	2		1		1
Other	1		2		(1)
Adjusted EBITDA (a)	$	306	$	285	21
Capital expenditures	$	116	$	98	18

(a) - Beginning in 2023, we updated our calculation methodology of adjusted EBITDA to include adjusted EBITDA from our unconsolidated affiliates using the same recognition and measurement methods used to record equity in net earnings from investments. This change resulted in an additional $2 million of adjusted EBITDA in the first quarter of 2023.

Changes in commodity prices and sales volumes affect both revenues and cost of sales and fuel and, therefore, the impact is largely offset between these line items.

Adjusted EBITDA increased $21 million for the three months ended March 31, 2024, compared with the same period in 2023, primarily as a result of the following:

•an increase of $26 million from higher volumes due primarily to increased production in the Rocky Mountain region; and

•an increase of $7 million due primarily to higher average fee rates and higher realized natural gas and condensate prices, net of hedging, offset partially by lower realized NGL prices, net of hedging; offset by

•an increase of $12 million in operating costs due primarily to higher property insurance premiums, and higher employee-related costs, outside services and materials and supplies expense due primarily to the growth of our operations.

Capital expenditures increased for the three months ended March 31, 2024, compared with the same period in 2023, due primarily to our routine capital projects.

	Three Months Ended
	March 31,
Operating Information (a)	2024		2023
Natural gas processed (BBtu/d) (b)	2,894		2,794
Average fee rate ($/MMBtu)	$	1.21	$	1.13

(a) - Includes volumes for consolidated entities only.

(b) - Includes volumes we processed at company-owned and third-party facilities.

Our natural gas processed volumes increased for the three months ended March 31, 2024, compared with the same period in 2023, due primarily to increased production in the Rocky Mountain region, offset partially by the impact of winter weather in the Rocky Mountain and Mid-Continent regions in the first quarter of 2024.

Our average fee rate increased for the three months ended March 31, 2024, compared with the same period in 2023, due primarily to inflation-based escalators in our contracts.

Commodity Price Risk - Our Natural Gas Gathering and Processing segment is exposed to commodity price risk as a result of retaining a portion of the commodity sales proceeds associated with our fee with POP contracts. We have hedged approximately 65% of our forecasted equity volumes for our Natural Gas Gathering and Processing segment in 2024.

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Natural Gas Liquids

Selected Financial Results and Operating Information - The following tables set forth certain selected financial results and operating information for our Natural Gas Liquids segment for the periods indicated:

		Three Months Ended				Three Months
		March 31,				2024 vs. 2023
Financial Results		2024		2023		$ Increase (Decrease)
	(Millions of dollars)
NGL and condensate sales		$	3,264	$	3,551	(287)
Exchange service and other revenues		124		134		(10)
Transportation and storage revenues		48		50		(2)
Cost of sales and fuel (exclusive of depreciation and operating costs)		(2,698)		(3,095)		(397)
Operating costs, excluding noncash compensation adjustments		(173)		(146)		27
Adjusted EBITDA from unconsolidated affiliates (a)		17		11		6
Other		6		778		(772)
Adjusted EBITDA (a)		$	588	$	1,283	(695)
Capital expenditures		$	253	$	137	116

(a) - Beginning in 2023, we updated our calculation methodology of adjusted EBITDA to include adjusted EBITDA from our unconsolidated affiliates using the same recognition and measurement methods used to record equity in net earnings from investments. This change resulted in an additional $2 million of adjusted EBITDA in the first quarter of 2023.

Changes in commodity prices and sales volumes affect both revenues and cost of sales and fuel and, therefore, the impact is largely offset between these line items.

Adjusted EBITDA decreased $695 million for the three months ended March 31, 2024, compared with the same period in 2023, primarily as a result of the following:

•a decrease of $748 million related to the Medford incident, due primarily to an insurance settlement gain in 2023 of $779 million, offset partially by $31 million of lower third-party fractionation costs in the current year; and

•an increase of $27 million in operating costs due primarily to planned asset maintenance and higher property insurance premiums; offset by

•an increase of $75 million in exchange services due primarily to higher volumes in the Rocky Mountain region.

Capital expenditures increased for the three months ended March 31, 2024, compared with the same period in 2023, due primarily to capital projects, which includes our MB-6 fractionator and pipeline expansion projects.

	Three Months Ended
	March 31,
Operating Information	2024		2023
Raw feed throughput (MBbl/d) (a)	1,241		1,256
Average Conway-to-Mont Belvieu OPIS price differential - ethane in ethane/propane mix ($/gallon)	$	0.00	$	0.03

(a) - Represents physical raw feed volumes for which we provide transportation and/or fractionation services.

We generally expect ethane volumes to increase or decrease with corresponding increases or decreases in overall NGL production. However, ethane volumes may experience growth or decline greater than corresponding growth or decline in overall NGL production due to ethane economics causing producers to recover or reject ethane.

Volumes decreased for the three months ended March 31, 2024, compared with the same period in 2023, due primarily to lower ethane recovery and the impact of winter weather in the first quarter of 2024, offset partially by increased production in the Rocky Mountain region.

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Natural Gas Pipelines

Selected Financial Results and Operating Information - The following tables set forth certain selected financial results and operating information for our Natural Gas Pipelines segment for the periods indicated:

	Three Months Ended				Three Months
	March 31,				2024 vs. 2023
Financial Results	2024		2023		$ Increase (Decrease)
	(Millions of dollars)
Transportation revenues	$	119	$	107	12
Storage revenues	38		38		—
Residue natural gas sales and other revenues	28		26		2
Cost of sales and fuel (exclusive of depreciation and operating costs)	(15)		(14)		1
Operating costs, excluding noncash compensation adjustments	(51)		(43)		8
Adjusted EBITDA from unconsolidated affiliates (a)	47		44		3
Other	(1)		—		(1)
Adjusted EBITDA (a)	$	165	$	158	7
Capital expenditures	$	79	$	46	33

(a) - Beginning in 2023, we updated our calculation methodology of adjusted EBITDA to include adjusted EBITDA from our unconsolidated affiliates using the same recognition and measurement methods used to record equity in net earnings from investments. This change resulted in an additional $13 million of adjusted EBITDA in the first quarter of 2023.

Adjusted EBITDA increased $7 million for the three months ended March 31, 2024, compared with the same period in 2023, primarily as a result of the following:

•an increase of $12 million in transportation services due primarily to higher firm and interruptible rates; offset by

•an increase of $8 million in operating costs due primarily to planned asset maintenance, higher property insurance premiums and employee-related costs.

Capital expenditures increased for the three months ended March 31, 2024, compared with the same period in 2023, due primarily to our project to reactivate previously idled storage in Texas.

	Three Months Ended
	March 31,
Operating Information (a)	2024		2023
Natural gas transportation capacity contracted (MDth/d)	8,086		7,693
Transportation capacity contracted	97	%	96	%

(a) - Includes volumes for consolidated entities only.

In July 2023, Viking filed a proposed increase in rates pursuant to Section 4 of the Natural Gas Act with the FERC. In February 2024, Viking reached a settlement in principle with the participants in the Section 4 rate case, which, if approved by the FERC, will result in an increase in rates for Viking. We do not expect the increase in rates to impact materially our results of operations.

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Refined Products and Crude

Selected Financial Results and Operating Information - The following tables set forth certain selected financial results and operating information for our Refined Products and Crude segment for the period indicated:

	Three Months Ended
	March 31,
Financial Results	2024
	(Millions of dollars)
Product sales	$	351
Transportation revenues	340
Storage, terminals and other revenues	153
Cost of sales and fuel (exclusive of depreciation and operating costs)	(285)
Operating costs, excluding noncash compensation adjustments	(210)
Adjusted EBITDA from unconsolidated affiliates	35
Other	(3)
Adjusted EBITDA	$	381
Capital expenditures	$	42

Changes in commodity prices and sales volumes affect both revenues and cost of sales and fuel in our Consolidated Statements of Income and, therefore, the impact is largely offset between these line items.

	Three Months Ended
	March 31,
Operating Information (a)	2024
Refined Products volume shipped (MBbl/d)	1,411
Crude oil volume shipped (MBbl/d)	747

(a) - Includes volumes for consolidated entities only.

Non-GAAP Financial Measures

The following table sets forth a reconciliation of net income, the nearest comparable GAAP financial performance measure, to adjusted EBITDA for the periods indicated:

	Three Months Ended
	March 31,
(Unaudited)	2024		2023
Reconciliation of net income to adjusted EBITDA	(Millions of dollars)
Net income	$	639	$	1,049
Interest expense, net of capitalized interest	300		166
Depreciation and amortization	254		162
Income taxes	208		330
Adjusted EBITDA from unconsolidated affiliates (b)	101		56
Equity in net earnings from investments (b)	(76)		(40)
Noncash compensation expense and other	15		10
Adjusted EBITDA (a)(b)	$	1,441	$	1,733
Reconciliation of segment adjusted EBITDA to adjusted EBITDA
Segment adjusted EBITDA:
Natural Gas Gathering and Processing	$	306	$	285
Natural Gas Liquids (a)	588		1,283
Natural Gas Pipelines	165		158
Refined Products and Crude	381		—
Other	1		7
Adjusted EBITDA (a)(b)	$	1,441	$	1,733

(a) - The three months ended March 31, 2023, includes $733 million related to the Medford incident, including a settlement gain of $779 million, offset partially by $46 million of third-party fractionation costs.

(b) - Beginning in 2023, we updated our calculation methodology of adjusted EBITDA to include adjusted EBITDA from our unconsolidated affiliates using the same recognition and measurement methods used to record equity in net earnings from investments. This change resulted in an additional $16 million of adjusted EBITDA in the first quarter of 2023.

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CONTINGENCIES

See Note J of the Notes to Consolidated Financial Statements in this Quarterly Report for discussion of regulatory and legal matters.

LIQUIDITY AND CAPITAL RESOURCES

General - Our primary sources of cash inflows are operating cash flows, proceeds from our commercial paper program and our $2.5 Billion Credit Agreement, debt issuances and the issuance of common stock for our liquidity and capital resources requirements.

We expect our sources of cash inflows to provide sufficient resources to finance our operations, capital expenditures, quarterly cash dividends, maturities of long-term debt, share repurchases and contributions to unconsolidated affiliates. We believe we have sufficient liquidity due to our $2.5 Billion Credit Agreement, which expires in June 2027, and access to $1.0 billion available through our “at-the-market” equity program. As of the date of this report, no shares have been sold through our “at-the-market” equity program.

Cash Management - At March 31, 2024, we had $65 million of cash and cash equivalents. We use a centralized cash management program that concentrates the cash assets of our nonguarantor operating subsidiaries in joint accounts for the purposes of providing financial flexibility and lowering the cost of borrowing, transaction costs and bank fees. Our centralized cash management program provides that funds in excess of the daily needs of our operating subsidiaries are concentrated, consolidated or otherwise made available for use by other entities within our consolidated group. Our operating subsidiaries participate in this program to the extent they are permitted pursuant to FERC regulations or their operating agreements. Under the cash management program, depending on whether a participating subsidiary has short-term cash surpluses or cash requirements, we provide cash to the subsidiary or the subsidiary provides cash to us.

Guarantees - ONEOK, ONEOK Partners, the Intermediate Partnership and Magellan have cross guarantees in place for ONEOK’s and ONEOK Partners’ indebtedness. The guarantees in place for our and ONEOK Partners’ indebtedness are full, irrevocable, unconditional and absolute joint and several guarantees to the holders of each series of outstanding securities. Liabilities under the guarantees rank equally in right of payment with all existing and future senior unsecured indebtedness. The Intermediate Partnership holds all of ONEOK Partners’ interests and equity in its subsidiaries, which are nonguarantors, and substantially all the assets and operations reside with nonguarantor operating subsidiaries. Magellan holds interests in its subsidiaries, which are nonguarantors, and substantially all the assets and operations reside with nonguarantor operating subsidiaries. Therefore, as allowed under Rule 13-01, we have excluded the summarized financial information for each issuer and guarantor as the combined financial information of the subsidiary issuers and parent guarantor, excluding our ownership of all the interests in ONEOK Partners and Magellan, reflect no material assets, liabilities or results of operations, apart from the guaranteed indebtedness. For additional information on our and ONEOK Partners’ indebtedness, please see Note H of the Notes to Consolidated Financial Statements in our Annual Report.

Short-term Liquidity - Our principal sources of short-term liquidity consist of cash generated from operating activities, distributions received from our unconsolidated affiliates, proceeds from our commercial paper program and our $2.5 Billion Credit Agreement. As of March 31, 2024, we had no borrowings under our $2.5 Billion Credit Agreement, and we are in compliance with all covenants.

As of March 31, 2024, we had a working capital (defined as current assets less current liabilities) deficit of $1.2 billion, due primarily to current maturities of long-term debt and short-term borrowings. Generally, our working capital is influenced by several factors, including, among other things: (i) the timing of (a) debt and equity issuances, (b) the funding of capital expenditures, (c) scheduled debt payments, and (d) accounts receivable and payable; and (ii) the volume and cost of inventory and commodity imbalances. We may have working capital deficits in future periods as our long-term debt becomes current. We do not expect a working capital deficit of this nature to have a material adverse impact to our cash flows or operations.

For additional information on our $2.5 Billion Credit Agreement, see Note F of the Notes to Consolidated Financial Statements in this Quarterly Report.

Long-term Financing - In addition to our principal sources of short-term liquidity discussed above, we expect to fund our longer-term financing requirements by issuing long-term notes, as needed. Other options to obtain financing include, but are not limited to, issuing common stock, loans from financial institutions, issuance of convertible debt securities or preferred equity securities, asset securitization and the sale and lease-back of facilities.

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We may, at any time, seek to retire or purchase our or ONEOK Partners’ outstanding debt through cash purchases and/or exchanges for equity or debt, in open-market repurchases, privately negotiated transactions or otherwise. Such repurchases and exchanges, if any, will be on such terms and prices as we may determine, and will depend on prevailing market conditions, or liquidity requirements, contractual restrictions and other factors. The amounts involved may be material.

Share Repurchase Program - In January 2024, our Board of Directors authorized a share repurchase program to buy up to $2.0 billion of our outstanding common stock and targets the program to be largely utilized over the next four years. We expect shares to be acquired from time to time in open-market transactions or through privately negotiated transactions at our discretion, subject to market conditions and other factors. We expect any purchases to be funded by cash on hand, operating cash flows and short-term borrowings. The program will terminate upon completion of the repurchase of $2.0 billion of common stock or on January 1, 2029, whichever occurs first. As of April 22, 2024, no shares have been repurchased under the program.

Capital Expenditures - We proactively monitor lead times on materials and equipment used in constructing capital projects, and we enter into procurement agreements for long-lead items for potential projects to plan for future growth. Our capital expenditures are financed typically through operating cash flows and short- and long-term debt.

Capital expenditures, excluding AFUDC, were $512 million and $289 million for the three months ended March 31, 2024 and 2023, respectively.

We expect total capital expenditures, excluding AFUDC and capitalized interest, of $1.75-$1.95 billion in 2024.

Credit Ratings - Our long-term debt credit ratings as of April 22, 2024, are shown in the table below:

Rating Agency	Long-Term Rating	Short-Term Rating	Outlook
Moody’s	Baa2	Prime-2	Stable
S&P	BBB	A-2	Stable
Fitch	BBB	F2	Stable

Our credit ratings, which are investment grade, may be affected by our leverage, liquidity, credit profile or potential transactions. The most common criteria for assessment of our credit ratings are the debt-to-EBITDA ratio, interest coverage, business risk profile and liquidity. If our credit ratings were downgraded, our cost to borrow funds under our $2.5 Billion Credit Agreement could increase and a potential loss of access to the commercial paper market could occur. In the event that we are unable to borrow funds under our commercial paper program and there has not been a material adverse change in our business, we would continue to have access to our $2.5 Billion Credit Agreement, which expires in 2027. An adverse credit rating change alone is not a default under our $2.5 Billion Credit Agreement.

In the normal course of business, our counterparties provide us with secured and unsecured credit. In the event of a downgrade in our credit ratings or a significant change in our counterparties’ evaluation of our creditworthiness, we could be required to provide additional collateral in the form of cash, letters of credit or other negotiable instruments as a condition of continuing to conduct business with such counterparties. We may be required to fund margin requirements with our counterparties with cash, letters of credit or other negotiable instruments.

Dividends - Holders of our common stock share equally in any common stock dividends declared by our Board of Directors, subject to the rights of the holders of outstanding preferred stock. In February 2024, we paid a common stock dividend of 99 cents per share ($3.96 per share on an annualized basis), an increase of 3.7% compared with the same quarter in the prior year. A common stock dividend of 99 cents per share was declared in April 2024, for the shareholders of record at the close of business on May 1, 2024, payable May 15, 2024.

Our Series E Preferred Stock pays quarterly dividends on each share of Series E Preferred Stock, when, as and if declared by our Board of Directors, at a rate of 5.5% per year. We paid dividends for the Series E Preferred Stock of $0.3 million in February 2024. Dividends totaling $0.3 million were declared in April 2024, for the Series E Preferred Stock and are payable May 15, 2024.

For the three months ended March 31, 2024, our cash flows from operations exceeded dividends paid by $18 million. We expect our cash flows from operations to continue to sufficiently fund our cash dividends. To the extent operating cash flows are not sufficient to fund our dividends, we may utilize cash on hand from other sources of short- and long-term liquidity to fund a portion of our dividends.

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CASH FLOW ANALYSIS

We use the indirect method to prepare our Consolidated Statements of Cash Flows. Under this method, we reconcile net income to cash flows provided by operating activities by adjusting net income for those items that affect net income but do not result in actual cash receipts or payments during the period and for operating cash items that do not impact net income. These reconciling items can include depreciation and amortization, deferred income taxes, impairment charges, allowance for equity funds used during construction, gain or loss on sale of assets, net undistributed earnings from unconsolidated affiliates, share-based compensation expense, other amounts and changes in our assets and liabilities not classified as investing or financing activities.

The following table sets forth the changes in cash flows by operating, investing and financing activities for the periods indicated:

					Variances
	Three Months Ended				2024 vs. 2023
	March 31,				$ Increase (Decrease) in Cash
	2024		2023
	(Millions of dollars)
Total cash provided by (used in):
Operating activities	$	596	$	1,221	$	(625)
Investing activities	(578)		47		(625)
Financing activities	(291)		(808)		517
Change in cash and cash equivalents	(273)		460		(733)
Cash and cash equivalents at beginning of period	338		220		118
Cash and cash equivalents at end of period	$	65	$	680	$	(615)

Operating Cash Flows - Operating cash flows are affected by earnings from our business activities and changes in our operating assets and liabilities. Changes in commodity prices and demand for our services or products, whether because of general economic conditions, changes in supply, changes in demand for the end products that are made with our products or increased competition from other service providers, could affect our earnings and operating cash flows. Our operating cash flows can also be impacted by changes in our inventory balances, which are driven primarily by commodity prices, supply, demand and the operation of our assets.

Cash flows from operating activities, before changes in operating assets and liabilities for the three months ended March 31, 2024, decreased $142 million compared with the same period in 2023, due primarily to insurance proceeds received from the Medford settlement in 2023, offset partially by the impact of the Magellan Acquisition in our Refined Products and Crude segment, as discussed in “Financial Results and Operating Information.”

The changes in operating assets and liabilities decreased operating cash flows $502 million for the three months ended March 31, 2024, compared with a decrease of $19 million for the same period in 2023. This change is due primarily to changes in accounts receivable resulting from the timing of receipt of cash from counterparties and from inventory, both of which vary from period to period, and with changes in commodity prices, and from changes in risk management assets and liabilities; offset partially by changes in accounts payable, which also vary from period to period with changes in commodity prices, and from the timing of payments to vendors, suppliers and other third parties.

Investing Cash Flows - Cash from investing activities for the three months ended March 31, 2024, decreased $625 million, compared with the same period in 2023, due primarily to insurance proceeds received from the Medford settlement in 2023, and an increase in capital expenditures in 2024 related to our capital projects.

Financing Cash Flows - Cash used in financing activities for the three months ended March 31, 2024, decreased $517 million, compared with the same period in 2023, due primarily to the repayment of long-term debt in 2023 and short-term borrowings in 2024, offset partially by increased dividends paid in 2024.

REGULATORY, ENVIRONMENTAL AND SAFETY MATTERS

Information about our regulatory, environmental and safety matters can be found in “Regulatory, Environmental and Safety Matters” under Part I, Item 1, Business, in our Annual Report.

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IMPACT OF NEW ACCOUNTING STANDARDS

See Note A of the Notes to Consolidated Financial Statements in this Quarterly Report for discussion of new accounting standards.

CRITICAL ACCOUNTING ESTIMATES

The preparation of our Consolidated Financial Statements and related disclosures in accordance with GAAP requires us to make estimates and assumptions with respect to values or conditions that cannot be known with certainty that affect the reported amounts of assets and liabilities, and the disclosure of contingent assets and liabilities at the date of the Consolidated Financial Statements. These estimates and assumptions also affect the reported amounts of revenue and expenses during the reporting period. Although we believe these estimates and assumptions are reasonable, actual results could differ from our estimates.

Information about our critical accounting estimates is included under Item 7, Management’s Discussion and Analysis of Financial Condition and Results of Operations, “Critical Accounting Estimates,” in our Annual Report.

FORWARD-LOOKING STATEMENTS

This Quarterly Report contains forward-looking statements in reliance on the safe harbor protections of the Securities Act of 1933, as amended, and the Exchange Act, which involve substantial risk and uncertainties. The forward-looking statements relate to our anticipated financial performance, liquidity, management’s plans and objectives for our future capital projects and other future operations, our business prospects, the outcome of regulatory and legal proceedings, market conditions and other matters. The following discussion is intended to identify important factors that could cause future outcomes to differ materially from those set forth in the forward-looking statements.

Forward-looking statements and other statements in this Quarterly Report regarding our environmental, social and other sustainability targets, plans and goals are not an indication that these statements are required to be disclosed in our filings with the SEC, or that we will continue to make similar statements in the same extent or manner in future filings. In addition, historical, current and forward-looking environmental, social and sustainability-related statements may be based on standards and processes for measuring progress that are still developing and that continue to evolve, and assumptions that are subject to change in the future.

Forward-looking statements include the items identified in the preceding paragraphs, the information concerning possible or assumed future results of our operations and other statements contained in this Quarterly Report identified by words such as “anticipates,” “believes,” “continues,” “could,” “estimates,” “expect,” “forecasts,” “goal,” “guidance,” “intends,” “may,” “might,” “outlook,” “plans,” “potential,” “projects,” “scheduled,” “should,” “target,” “will,” “would,” and other words and terms of similar meaning.

One should not place undue reliance on forward-looking statements. Known and unknown risks, uncertainties and other factors may cause our actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by forward-looking statements. Those factors may affect our operations, markets, products, services and prices. In addition to any assumptions and other factors referred to specifically in connection with the forward-looking statements, factors that could cause our actual results to differ materially from those contemplated in any forward-looking statement include, among others, the following:

•the impact on drilling and production by factors beyond our control, including the demand for natural gas, NGLs, Refined Products and crude oil; producers’ desire and ability to drill and obtain necessary permits; regulatory compliance; reserve performance; and capacity constraints and/or shut downs on the pipelines that transport crude oil, natural gas, NGLs, and Refined Products from producing areas and our facilities;

•the impact of unfavorable economic and market conditions, inflationary pressures, including increased interest rates, which may increase our capital expenditures and operating costs, raise the cost of capital or depress economic growth;

•the impact of the volatility of natural gas, NGL, Refined Products and crude oil prices on our earnings and cash flows, which is impacted by a variety of factors beyond our control, including international terrorism and conflicts and the geopolitical instability;

•the impact of reduced volatility in energy prices or new government regulations on our business;

•our dependence on producers, gathering systems, refineries and pipelines owned and operated by others and the impact of any closures, interruptions or reduced activity levels at these facilities;

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•the impact of increased attention to ESG issues, including climate change, and risks associated with the physical impacts of climate change;

•risks associated with operational hazards and unforeseen interruptions at our operations;

•the inability of insurance proceeds to cover all liabilities or incurred costs and losses, or lost earnings, resulting from a loss;

•the risk of increased costs for insurance premiums or less favorable coverage;

•demand for our services and products in the proximity of our facilities;

•risks associated with our ability to hedge against commodity price risks or interest rate risks;

•a breach of information security, including a cybersecurity attack, or failure of one or more key information technology or operational systems;

•exposure to construction risk and supply risks if adequate natural gas, NGL, Refined Products and crude oil supply is unavailable upon completion of facilities;

•the accuracy of estimates of hydrocarbon reserves, which could result in lower than anticipated volumes;

•our lack of ownership over all of the land on which our property is located and certain of our facilities and equipment;

•the impact of changes in estimation, type of commodity and other factors on our measurement adjustments;

•excess capacity on our pipelines, processing, fractionation, terminal and storage assets;

•risks associated with the period of time our assets have been in service;

•our partial reliance on cash distributions from our unconsolidated affiliates on our operating cash flows;

•our ability to cause our joint ventures to take or not take certain actions unless some or all of our joint-venture participants agree;

•our reliance on others to operate certain joint-venture assets and to provide other services;

•increased regulation of exploration and production activities, including hydraulic fracturing, well setbacks and disposal of wastewater;

•impacts of regulatory oversight and potential penalties on our business;

•risks associated with the rate regulation, challenges or changes, which may reduce the amount of cash we generate;

•the impact of our gas liquids blending activities, which subject us to federal regulations that govern renewable fuel requirements in the U.S.;

•incurrence of significant costs to comply with the regulation of GHG emissions;

•the impact of federal and state laws and regulations relating to the protection of the environment, public health and safety on our operations, as well as increased litigation and activism challenging oil and gas development as well as changes to and/or increased penalties from the enforcement of laws, regulations and policies;

•the impact of unforeseen changes in interest rates, debt and equity markets and other external factors over which we have no control;

•actions by rating agencies concerning our credit;

•our indebtedness and guarantee obligations could cause adverse consequences, including making us vulnerable to general adverse economic and industry conditions, limiting our ability to borrow additional funds and placing us at competitive disadvantages compared with our competitors that have less debt;

•an event of default may require us to offer to repurchase certain of our or ONEOK Partners’ senior notes or may impair our ability to access capital;

•the right to receive payments on our outstanding debt securities and subsidiary guarantees is unsecured and effectively subordinated to any future secured indebtedness and any existing and future indebtedness of our subsidiaries that do not guarantee the senior notes;

•use by a court of fraudulent conveyance to avoid or subordinate the cross guarantees of our or ONEOK Partners’ indebtedness;

•the risks associated with pending or possible acquisitions and dispositions, including our ability to finance or integrate any such acquisitions and any regulatory delay or conditions imposed by regulatory bodies in connection with any such acquisitions and dispositions;

•risks related to the Magellan Acquisition, including the risk that we may not realize the anticipated benefits of the Magellan Acquisition or successfully integrate the two companies;

•our ability to pay dividends;

•our exposure to the credit risk of our customers or counterparties;

•a shortage of skilled labor;

•misconduct or other improper activities engaged in by our employees;

•the impact of potential impairment charges;

•the impact of the changing cost of providing pension and postretirement health care benefits to eligible employees and qualified retirees;

•our ability to maintain an effective system of internal controls; and

•the risk factors listed in the reports we have filed and may file with the SEC.

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These factors are not necessarily all of the important factors that could cause actual results to differ materially from those expressed in any of our forward-looking statements. Other factors could also affect adversely our future results. These and other risks are described in greater detail in Part I, Item 1A, Risk Factors, in our Annual Report and in our other filings that we make with the SEC, which are available via the SEC’s website at www.sec.gov and our website at www.oneok.com. All forward-looking statements attributable to us or persons acting on our behalf are expressly qualified in their entirety by these factors. Any such forward-looking statement speaks only as of the date on which such statement is made, and other than as required under securities laws, we undertake no obligation to update publicly any forward-looking statement whether as a result of new information, subsequent events or change in circumstances, expectations or otherwise.

ITEM 3.QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

There have been no material changes in market risk exposures that would affect the quantitative and qualitative disclosures presented as of December 31, 2023, in Part II, Item 7A in our Annual Report.

See Note E of the Notes to Consolidated Financial Statements in this Quarterly Report for more information on our hedging activities.

ITEM 4.CONTROLS AND PROCEDURES

Quarterly Evaluation of Disclosure Controls and Procedures - Our Chief Executive Officer (Principal Executive Officer) and Chief Financial Officer (Principal Financial Officer) have concluded that our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) of the Exchange Act) were effective as of the end of the period covered by this report.

Changes in Internal Control Over Financial Reporting - There have been no changes in our internal control over financial reporting during the quarter ended March 31, 2024, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

PART II - OTHER INFORMATION

ITEM 1.LEGAL PROCEEDINGS

We have elected to use a $1 million threshold for disclosing environmental proceedings.

Information about our legal proceedings is included in Note J of the Notes to Consolidated Financial Statements in this Quarterly Report and under Note O of the Notes to Consolidated Financial Statements in our Annual Report.

ITEM 1A.RISK FACTORS

Our investors should consider the risks set forth in Part I, Item 1A, Risk Factors, of our Annual Report that could affect us and our business. Although we have tried to discuss key factors, our investors need to be aware that other risks may prove to be important in the future. New risks may emerge at any time, and we cannot predict such risks or estimate the extent to which they may affect our financial performance. Investors should consider carefully the discussion of risks and the other information included or incorporated by reference in this Quarterly Report, including “Forward-Looking Statements,” which are included in Part I, Item 2, Management’s Discussion and Analysis of Financial Condition and Results of Operations.

33

ITEM 2.UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

ISSUER PURCHASES OF EQUITY SECURITIES

Period	Total Number of Shares Purchased	Average Price Paid Per Share		Total Number of Shares Purchased as Part of the Publicly Announced Program (a)	Maximum Approximate Dollar Value of Shares That May Yet Be Purchased Under the Program  (Millions of dollars)
January 1 - January 31, 2024	—	$	—	—	$	2,000
February 1 - February 29, 2024	—	$	—	—	$	2,000
March 1 - March 31, 2024	—	$	—	—	$	2,000
Total	—			—

(a) - In January 2024, our Board of Directors authorized a share repurchase program to buy up to $2.0 billion of our outstanding common stock. The program will terminate upon completion of the repurchases, or on January 1, 2029, whichever occurs first.

ITEM 3.DEFAULTS UPON SENIOR SECURITIES

Not applicable.

ITEM 4.MINE SAFETY DISCLOSURES

Not applicable.

ITEM 5.OTHER INFORMATION

Not applicable.

ITEM 6.EXHIBITS

Readers of this report should not rely on or assume the accuracy of any representation or warranty or the validity of any opinion contained in any agreement filed as an exhibit to this Quarterly Report, because such representation, warranty or opinion may be subject to exceptions and qualifications contained in separate disclosure schedules, may represent an allocation of risk between parties in the particular transaction, may be qualified by materiality standards that differ from what may be viewed as material for securities law purposes, or may no longer continue to be true as of any given date. All exhibits attached to this Quarterly Report are included for the purpose of complying with requirements of the SEC. Other than the certifications made by our officers pursuant to the Sarbanes-Oxley Act of 2002 included as exhibits to this Quarterly Report, all exhibits are included only to provide information to investors regarding their respective terms and should not be relied upon as constituting or providing any factual disclosures about us, any other persons, any state of affairs or other matters.

The following exhibits are filed as part of this Quarterly Report:

Exhibit No.	Exhibit Description
3.1	Amended and Restated Certificate of Incorporation of ONEOK, Inc., dated July 3, 2017, as amended (incorporated by reference from Exhibit 3.2 to ONEOK, Inc.’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2017, filed November 1, 2017 (File No. 1-13643)).
3.2	Amended and Restated By-laws of ONEOK, Inc. (incorporated by reference from Exhibit 3.1 to ONEOK Inc.’s Current Report on Form 8-K filed, February 24, 2023 (File No. 1-13643)).
10.1	Form of 2024 Restricted Unit Award Agreement (incorporated by reference from Exhibit 10.24 to ONEOK, Inc’s Annual Report on Form 10-K, filed February 27, 2024 (File No. 1-13643)).
10.2	Form of 2024 Performance Unit Award Agreement (incorporated by reference from Exhibit 10.25 to ONEOK, Inc.’s Annual Report on Form 10-K, filed February 27, 2024 (File No. 1-13643)).
22.1	List of subsidiary guarantors and issuers of guaranteed securities.

34

31.1	Certification of Pierce H. Norton II pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification of Walter S. Hulse III pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1	Certification of Pierce H. Norton II pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished only pursuant to Rule 13a-14(b)).
32.2	Certification of Walter S. Hulse III pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished only pursuant to Rule 13a-14(b)).
101.INS	Inline XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
101.SCH	Inline XBRL Taxonomy Extension Schema Document.
101.CAL	Inline XBRL Taxonomy Calculation Linkbase Document.
101.DEF	Inline XBRL Taxonomy Extension Definitions Document.
101.LAB	Inline XBRL Taxonomy Label Linkbase Document.
101.PRE	Inline XBRL Taxonomy Presentation Linkbase Document.
104	Cover Page Interactive Data File (embedded within the Inline XBRL document and contained in Exhibit 101).

Attached as Exhibit 101 to this Quarterly Report are the following Inline XBRL-related documents: (i) Document and Entity Information; (ii) Consolidated Statements of Income for the three months ended March 31, 2024 and 2023; (iii) Consolidated Statements of Comprehensive Income for the three months ended March 31, 2024 and 2023; (iv) Consolidated Balance Sheets at March 31, 2024, and December 31, 2023; (v) Consolidated Statements of Cash Flows for the three months ended March 31, 2024 and 2023; (vi) Consolidated Statements of Changes in Equity for the three months ended March 31, 2024 and 2023; and (vii) Notes to Consolidated Financial Statements.

35

SIGNATURE

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

	ONEOK, Inc.
	Registrant
Date: May 1, 2024	By:	/s/ Walter S. Hulse III
		Walter S. Hulse III
		Chief Financial Officer, Treasurer and
		Executive Vice President, Investor Relations
		and Corporate Development
		(Principal Financial Officer)

36

EX-22.1

Exhibit 22.1

List of Subsidiary Guarantors and Issuers

of Guaranteed Securities

As of March 31, 2024, the following entities guarantee the notes issued by ONEOK, Inc. (the "ONEOK Notes") and ONEOK Partners, L.P. (the "ONEOK Partners Notes").

Entity	Jurisdiction of Incorporation or Organization	ONEOK Notes	ONEOK Partners Notes
ONEOK, Inc.	Oklahoma	Issuer	Guarantor
ONEOK Partners, L.P.	Delaware	Guarantor	Issuer
ONEOK Partners Intermediate Limited Partnership	Delaware	Guarantor	Guarantor
Magellan Midstream Partners, L.P.	Delaware	Guarantor	Guarantor

As of March 31, 2024, the ONEOK Notes consisted of the following securities:

Issued under the Indenture dated as of September 24, 1998

6-7/8% Debentures due 2028

Issued under the Indenture dated as of December 28, 2001

6.00% Notes due 2035

Issued under the Indenture dated as of April 19, 2007

6.40% Senior Notes due 2037

Issued under the Indenture dated as of August 11, 2010

3.20% Senior Notes due 2025

5.00% Senior Notes due 2026

3.25% Senior Notes due 2030

4.20% Senior Notes due 2042

5.15% Senior Notes due 2043

4.20% Senior Notes due 2045

4.25% Senior Notes due 2046

4.20% Senior Notes due 2047

4.85% Senior Notes due 2049

3.95% Senior Notes due 2050

Issued under the Indenture dated as of January 26, 2012

2.75% Notes due 2024

2.200% Notes due 2025

5.550% Notes due 2026

5.850% Notes due 2026

4.000% Notes due 2027

4.55% Notes due 2028

5.650% Notes due 2028

4.35% Notes due 2029

3.40% Notes due 2029

3.100% Notes due 2030

5.800% Notes due 2030

6.350% Notes due 2031

6.10% Notes due 2032

6.050% Notes due 2033

4.950% Notes due 2047

5.20% Notes due 2048

4.45% Notes due 2049

4.500% Notes due 2050

7.150% Notes due 2051

6.625% Notes due 2053

1

Exhibit 22.1

As of March 31, 2024, the ONEOK Partners Notes consisted of the following securities:

Issued under the Indenture dated as of September 25, 2006

4.90% Senior Notes due 2025

6.65% Senior Notes due 2036

6.85% Senior Notes due 2037

6.125% Senior Notes due 2041

6.200% Senior Notes due 2043

2

EX-31.1

Exhibit 31.1

Certification

I, Pierce H. Norton II, certify that:

I have reviewed this Quarterly Report on Form 10-Q of ONEOK, Inc.;

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;

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;

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

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: May 1, 2024

/s/ Pierce H. Norton II

Pierce H. Norton II

Chief Executive Officer

EX-31.2

Exhibit 31.2

Certification

I, Walter S. Hulse III, certify that:

I have reviewed this Quarterly Report on Form 10-Q of ONEOK, Inc.;

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;

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;

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

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: May 1, 2024

/s/ Walter S. Hulse III

Walter S. Hulse III

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 on Form 10-Q of ONEOK, Inc. (the “Registrant”) for the period ending March 31, 2024, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Pierce H. Norton II, Chief Executive Officer of the Registrant, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(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 Registrant.

/s/ Pierce H. Norton II

Pierce H. Norton II

Chief Executive Officer

May 1, 2024

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to ONEOK, Inc. and will be retained by ONEOK, Inc. and furnished to the Securities and Exchange Commission or its staff upon request.

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 on Form 10-Q of ONEOK, Inc. (the “Registrant”) for the period ending March 31, 2024, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Walter S. Hulse III, Chief Financial Officer of the Registrant, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(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 Registrant.

/s/ Walter S. Hulse III

Walter S. Hulse III

Chief Financial Officer

May 1, 2024

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to ONEOK, Inc. and will be retained by ONEOK, Inc. and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2024	Apr. 22, 2024
Document and Entity Information [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2024
Document Transition Report	false
Entity File Number	001-13643
Entity Registrant Name	ONEOK, Inc.
Entity Incorporation, State or Country Code	OK
Entity Tax Identification Number	73-1520922
Entity Address, Address Line One	100 West Fifth Street,
Entity Address, City or Town	Tulsa,
Entity Address, State or Province	OK
Entity Address, Postal Zip Code	74103
City Area Code	918
Local Phone Number	588-7000
Title of 12(b) Security	Common stock, par value of $0.01
Trading Symbol	OKE
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		583,646,909
Entity Central Index Key	0001039684
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Amendment Flag	false

XML

CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenues
Total revenues (Note K)	$ 4,781	$ 4,521
Cost of sales and fuel (exclusive of items shown separately below)	2,897	3,347
Operations and maintenance	486	239
Depreciation and amortization	254	162
General taxes	86	57
Other operating income, net (Note C)	(6)	(781)
Operating income	1,064	1,497
Equity in net earnings from investments (Note I)	76	40
Other income, net	7	8
Interest expense (net of capitalized interest of $12 and $18, respectively)	(300)	(166)
Income before income taxes	847	1,379
Income taxes	(208)	(330)
Net income	639	1,049
Less: Preferred stock dividends	0	0
Net income available to common shareholders	$ 639	$ 1,049
Basic EPS (Note H) (in dollars per share)	$ 1.09	$ 2.34
Diluted EPS (Note H) (in dollars per share)	$ 1.09	$ 2.34
Average shares (millions)
Basic (in shares)	584.2	448.1
Diluted (in shares)	585.7	449.0
Commodity sales
Revenues
Total revenues (Note K)	$ 3,928	$ 4,156
Services
Revenues
Total revenues (Note K)	$ 853	$ 365

XML

CONSOLIDATED STATEMENTS OF INCOME (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Income Statement [Abstract]
Capitalized interest	$ 12	$ 18

XML

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 639	$ 1,049
Other comprehensive income (loss), net of tax
Change in fair value of derivatives, net of tax of $22 and $(7), respectively	(75)	23
Derivative amounts reclassified to net income, net of tax of $6 and $3, respectively	(21)	(12)
Changes in benefit plan obligations and other, net of tax of $$— and $$1, respectively	1	(2)
Total other comprehensive income (loss), net of tax	(95)	9
Comprehensive income	$ 544	$ 1,058

XML

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Change in fair value of derivatives, tax	$ 22	$ (7)
Derivative amounts reclassified to net income, tax	6	3
Change in retirement and other postretirement benefit plan obligations, tax	$ 0	$ 1

XML

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Current assets
Cash and cash equivalents	$ 65	$ 338
Accounts receivable, net	1,699	1,705
Materials and supplies	153	148
Inventories	798	639
Commodity imbalances	23	26
Other current assets	212	252
Total current assets	2,950	3,108
Property, plant and equipment
Property, plant and equipment	38,796	38,454
Accumulated depreciation and amortization	5,989	5,757
Net property, plant and equipment	32,807	32,697
Other assets
Investments in unconsolidated affiliates	1,939	1,874
Goodwill	5,056	4,952
Intangible assets, net	1,311	1,316
Other assets	327	319
Total other assets	8,633	8,461
Total assets	44,390	44,266
Current liabilities
Current maturities of long-term debt (Note F)	1,234	484
Short-term borrowings (Note F)	320	0
Accounts payable	1,480	1,564
Commodity imbalances	221	244
Accrued taxes	169	215
Accrued interest	268	381
Other current liabilities	502	564
Total current liabilities	4,194	3,452
Long-term debt, excluding current maturities	20,447	21,183
Deferred credits and other liabilities
Deferred income taxes	2,745	2,594
Other deferred credits	559	553
Total deferred credits and other liabilities	3,304	3,147
Commitments and contingencies (Note J)
Equity (Note G)
Preferred stock, $0.01 par value: authorized and issued $20,000 shares at March 31, 2024, and December 31, 2023	0	0
Common stock, $0.01 par value: authorized $1,200,000,000 shares; issued $609,713,834 shares and outstanding $583,644,277 shares at March 31, 2024; issued $609,713,834 shares and outstanding $583,093,100 shares at December 31, 2023	6	6
Paid-in capital	16,303	16,320
Accumulated other comprehensive loss	(128)	(33)
Retained earnings	927	868
Treasury stock, at cost: $26,069,557 shares at March 31, 2024, and $26,620,734 shares at December 31, 2023	(663)	(677)
Total equity	16,445	16,484
Total liabilities and equity	$ 44,390	$ 44,266

XML

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Mar. 31, 2024	Dec. 31, 2023
Equity (Note G)
Preferred stock, shares, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares, authorized (in shares)	20,000	20,000
Preferred stock, shares, issued (in shares)	20,000	20,000
Common stock, shares, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares, authorized (in shares)	1,200,000,000	1,200,000,000
Common stock, shares, issued (in shares)	609,713,834	609,713,834
Common stock, shares, outstanding (in shares)	583,644,277	583,093,100
Treasury stock, shares (in shares)	26,069,557	26,620,734

XML

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating activities
Net income	$ 639	$ 1,049
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	254	162
Equity in net earnings from investments	(76)	(40)
Distributions received from unconsolidated affiliates	78	43
Deferred income taxes	180	285
Medford settlement gain	0	(779)
Medford settlement proceeds	0	502
Other, net	23	18
Changes in assets and liabilities:
Accounts receivable	6	329
Inventories, net of commodity imbalances	(179)	20
Accounts payable	(29)	(237)
Risk-management assets and liabilities	(144)	26
Other assets and liabilities, net	(156)	(157)
Cash provided by operating activities	596	1,221
Investing activities
Capital expenditures (less allowance for equity funds used during construction)	(512)	(289)
Purchases of and contributions to unconsolidated affiliates	(92)	(2)
Distributions received from unconsolidated affiliates in excess of cumulative earnings	25	8
Medford settlement proceeds	0	328
Other, net	1	2
Cash provided by (used in) investing activities	(578)	47
Financing activities
Dividends paid	(578)	(427)
Short-term borrowings, net	320	0
Issuance of long-term debt, net of discounts	0	50
Repayment of long-term debt	0	(425)
Other, net	(33)	(6)
Cash used in financing activities	(291)	(808)
Change in cash and cash equivalents	(273)	460
Cash and cash equivalents at beginning of period	338	220
Cash and cash equivalents at end of period	$ 65	$ 680

XML

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Millions	Total	Preferred Stock Issued	Common Stock Issued	Paid-in Capital	Accumulated Other Comprehensive Loss	Retained Earnings	Treasury Stock
Shares, issued, beginning balance (in shares) at Dec. 31, 2022		20,000	474,916,234
Total equity, beginning balance at Dec. 31, 2022	$ 6,494	$ 0	$ 5	$ 7,253	$ (108)	$ 50	$ (706)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,049					1,049
Other comprehensive income (loss)	9				9
Preferred stock dividends	0
Common stock issued	4			(3)			7
Common stock dividends	(427)					(427)
Other, net	3			3
Shares, issued, ending balance (in shares) at Mar. 31, 2023		20,000	474,916,234
Total equity, ending balance at Mar. 31, 2023	7,132	$ 0	$ 5	7,253	(99)	672	(699)
Shares, issued, beginning balance (in shares) at Dec. 31, 2023		20,000	609,713,834
Total equity, beginning balance at Dec. 31, 2023	16,484	$ 0	$ 6	16,320	(33)	868	(677)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	639					639
Other comprehensive income (loss)	(95)				(95)
Preferred stock dividends	0
Common stock issued (in shares)			0
Common stock issued	6		$ 0	(8)			14
Common stock dividends	(579)			0		(579)
Other, net	(10)			(9)		(1)
Shares, issued, ending balance (in shares) at Mar. 31, 2024		20,000	609,713,834
Total equity, ending balance at Mar. 31, 2024	$ 16,445	$ 0	$ 6	$ 16,303	$ (128)	$ 927	$ (663)

XML

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Stockholders' Equity [Abstract]
Preferred stock, dividends paid (in dollars per share)	$ 13.75	$ 13.75
Common stock dividends paid (in dollars per share)	$ 0.99	$ 0.955

XML

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

3 Months Ended

Mar. 31, 2024

Accounting Policies [Abstract]

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Our accompanying unaudited Consolidated Financial Statements have been prepared pursuant to the rules and regulations of the SEC. These statements have been prepared in accordance with GAAP and reflect all adjustments that, in our opinion, are necessary for a fair statement of the results for the interim periods presented. All such adjustments are of a normal recurring nature. The 2023 year-end Consolidated Balance Sheet data was derived from our audited Consolidated Financial Statements but does not include all disclosures required by GAAP. These unaudited Consolidated Financial Statements should be read in conjunction with our audited Consolidated Financial Statements in our Annual Report.

Recently Issued Accounting Standards Update - Changes to GAAP are established by the FASB in the form of ASUs to the FASB Accounting Standards Codification. We consider the applicability and impact of all ASUs. There have been no new accounting pronouncements that have become effective or have been issued that are of significance or potential significance to us during the quarter, and no material updates to recently issued standards disclosed in our Annual Report.

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MAGELLAN ACQUISITION

3 Months Ended

Mar. 31, 2024

Business Combination and Asset Acquisition [Abstract]

MAGELLAN ACQUISITION

MAGELLAN ACQUISITION

On September 25, 2023, we completed the Magellan Acquisition. The acquisition strategically diversifies our complementary asset base and allows for significant expected synergies as a combined entity. Each common unit of Magellan was exchanged for a fixed ratio of 0.667 shares of ONEOK common stock and $25.00 of cash, for a total consideration of $14.1 billion. A total of approximately 135 million shares of common stock were issued, with a fair value of approximately $9.0 billion as of the closing date of the Magellan Acquisition. We funded the cash portion of the acquisition with an underwritten public offering of $5.25 billion senior unsecured notes. For additional information on our long-term debt, please see Note H in our Annual Report.

The Magellan Acquisition was accounted for using the acquisition method of accounting for business combinations pursuant to Accounting Standards Codification 805, “Business Combinations,” which requires, among other things, assets acquired and liabilities assumed to be recorded at their fair values on the acquisition date. Determining the fair value of acquired assets and liabilities assumed requires management’s judgment and the use of independent valuation specialists. During the three months ended March 31, 2024, there have been no material changes to the preliminary purchase price allocation disclosed in our Annual Report.

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MEDFORD INCIDENT	3 Months Ended
	Mar. 31, 2024
Unusual or Infrequent Items, or Both [Abstract]
MEDFORD INCIDENT	MEDFORD INCIDENTIn 2022, a fire occurred at our 210 MBbl/d Medford, Oklahoma, natural gas liquids fractionation facility. In the first quarter of 2023, we reached an agreement with our insurers to settle all claims for physical damage and business interruption related to the Medford incident. Under the terms of the settlement agreement, we agreed to resolve the claims for total insurance payments of $930 million, $100 million of which was received in 2022. The remaining $830 million was received in the first quarter of 2023. The proceeds serve as settlement for property damage, business interruption claims to the date of the settlement and as payment in lieu of future business interruption insurance claims. We applied the $830 million received to our outstanding insurance receivable at December 31, 2022, of $51 million, and recorded an operational gain for the remaining $779 million in other operating income, net, within the Consolidated Statement of Income. We classified proceeds received within the Consolidated Statement of Cash Flows based on our assessment of the nature of the loss (property and business interruption) included in the settlement.

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FAIR VALUE MEASUREMENTS

3 Months Ended

Mar. 31, 2024

Fair Value Disclosures [Abstract]

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS

Determining Fair Value - For our fair value measurements, we utilize market prices, third-party pricing services, present value methods and standard option valuation models to determine the price we would receive from the sale of an asset or the transfer of a liability in an orderly transaction at the measurement date. We measure the fair value of a group of financial assets and liabilities consistent with how a market participant would price the net risk exposure at the measurement date. Determining the appropriate classification of our fair value measurements within the fair value hierarchy requires management’s judgment regarding the degree to which market data is observable or corroborated by observable market data. We categorize derivatives based on the lowest level input that is significant to the fair value measurement in its entirety. Our valuation techniques and inputs are consistent with those discussed in Note A of the Notes to Consolidated Financial Statements in our Annual Report.

Recurring Fair Value Measurements - The following tables set forth our recurring fair value measurements as of the dates indicated:

	March 31, 2024
	Level 1		Level 2		Level 3		Total - Gross		Netting (a)		Total - Net
	(Millions of dollars)
Derivative assets
Commodity contracts	$	58	$	57	$	—	$	115	$	(114)	$	1
Total derivative assets	$	58	$	57	$	—	$	115	$	(114)	$	1
Derivative liabilities
Commodity contracts	$	(94)	$	(83)	$	—	$	(177)	$	177	$	—
Total derivative liabilities	$	(94)	$	(83)	$	—	$	(177)	$	177	$	—

(a) - Derivative assets and liabilities are presented in our Consolidated Balance Sheet on a net basis. We net derivative assets and liabilities when a legally enforceable master-netting arrangement exists between the counterparty to a derivative contract and us. At March 31, 2024, we held no cash and posted cash of $129 million with various counterparties, including $63 million of cash collateral that is offsetting derivative net liability positions under master-netting arrangements in the table above. The remaining $66 million of cash collateral in excess of derivative net liability positions is included in other current assets in our Consolidated Balance Sheet.

	December 31, 2023
	Level 1		Level 2		Level 3		Total - Gross		Netting (a)		Total - Net
	(Millions of dollars)
Derivative assets
Commodity contracts	$	109	$	68	$	—	$	177	$	(125)	$	52
Total derivative assets	$	109	$	68	$	—	$	177	$	(125)	$	52
Derivative liabilities
Commodity contracts	$	(40)	$	(44)	$	—	$	(84)	$	84	$	—
Total derivative liabilities	$	(40)	$	(44)	$	—	$	(84)	$	84	$	—

(a) - Derivative assets and liabilities are presented in our Consolidated Balance Sheet on a net basis. We net derivative assets and liabilities when a legally enforceable master-netting arrangement exists between the counterparty to a derivative contract and us. At December 31, 2023, we posted no cash and held cash of $41 million with various counterparties, which offsets our derivative net asset position under master netting arrangements as shown in the table above.

Other Financial Instruments - The approximate fair value of cash and cash equivalents, accounts receivable, accounts payable and short-term borrowings is equal to book value due to the short-term nature of these items. Our cash and cash equivalents are composed of bank and money market accounts and are classified as Level 1. Our short-term borrowings are classified as Level 2 since the estimated fair value of the short-term borrowings can be determined using information available in the commercial paper market. We have investments associated with our supplemental executive retirement plan and nonqualified deferred compensation plan that are carried at fair value and primarily are composed of mutual funds, municipal bonds and other fixed income securities classified as Level 1 and Level 2.

The estimated fair value of our consolidated long-term debt, including current maturities, was $21.0 billion and $21.4 billion at March 31, 2024, and December 31, 2023, respectively. The book value of our consolidated long-term debt, including current maturities, was $21.7 billion at March 31, 2024, and December 31, 2023. The estimated fair value of the aggregate senior notes outstanding was determined using quoted market prices for similar issues with similar terms and maturities. The estimated fair value of our consolidated long-term debt is classified as Level 2.

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RISK-MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES

3 Months Ended

Mar. 31, 2024

Derivative Instruments and Hedging Activities Disclosure [Abstract]

RISK-MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES

RISK-MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES

Risk-management Activities - We are sensitive to changes in natural gas, NGLs, Refined Products and crude oil prices, principally as a result of contractual terms under which these commodities are processed, purchased and sold. We are also subject to the risk of interest-rate fluctuation in the normal course of business. We use physical-forward purchases and sales and financial derivatives to secure a certain price for a portion of our natural gas, NGLs, Refined Products, condensate and crude oil purchases and sales; to reduce our exposure to commodity price and interest-rate fluctuations; and to achieve more predictable cash flows. Additionally, we may use physical-forward purchases and financial derivatives to reduce commodity price risk associated with power and natural gas used to operate our facilities. We follow established policies and procedures to assess risk and approve, monitor and report our risk-management activities. We have not used these instruments for trading purposes.

Commodity price risk - Commodity price risk refers to the risk of loss in cash flows and future earnings arising from adverse changes in the price of natural gas, NGLs, Refined Products and crude oil. We may use commodity derivative instruments to reduce the near-term commodity price risk associated with a portion of our forecasted purchases and sales of commodities. Our exposure to commodity price risk is consistent with that discussed in our Annual Report.

Interest-rate risk - We may manage interest-rate risk through the use of fixed-rate debt, floating-rate debt, Treasury locks and interest-rate swaps. At both March 31, 2024, and December 31, 2023, we had no outstanding Treasury lock agreements or interest rate swaps.

Fair Values of Derivative Instruments - The following table sets forth the fair values of our derivative instruments presented on a gross basis as of the dates indicated:

		March 31, 2024				December 31, 2023
	Location in our Consolidated Balance Sheets	Assets		(Liabilities)		Assets		(Liabilities)
Derivatives designated as hedging instruments		(Millions of dollars)
Commodity contracts (a)(b)	Other current assets	$	103	$	(164)	$	163	$	(78)
Total derivatives designated as hedging instruments		103		(164)		163		(78)
Derivatives not designated as hedging instruments
Commodity contracts (a)(b)	Other current assets	12		(13)		14		(6)
Total derivatives not designated as hedging instruments		12		(13)		14		(6)
Total derivatives		$	115	$	(177)	$	177	$	(84)

(a) - Derivative assets and liabilities are presented in our Consolidated Balance Sheets on a net basis when a legally enforceable master-netting arrangement exists between the counterparty to a derivative contract and us.

(b) - At March 31, 2024, our derivative net liability positions under master-netting arrangements for financial commodity contracts were offset by cash collateral of $63 million.

Notional Quantities for Derivative Instruments - The following table sets forth the notional quantities for derivative instruments held as of the dates indicated:

		March 31, 2024	December 31, 2023
	Contract Type	Net Purchased/Payor (Sold/Receiver)
Derivatives designated as hedging instruments:
Cash flow hedges
Fixed price
- Natural gas (Bcf)	Futures and swaps	(17.4)	(16.0)
- NGLs, Refined Products and crude oil (MMBbl)	Futures and swaps	(16.0)	(14.5)
- Power (GWh)	Futures and swaps	22.1	22.1
Basis
- Natural gas (Bcf)	Futures and swaps	(17.2)	(16.0)
Derivatives not designated as hedging instruments:
Fixed price
- Natural gas (Bcf)	Futures and swaps	—	(0.7)
- NGLs, Refined Products and crude oil (MMBbl)	Futures and swaps	(0.6)	0.1
Basis
- Natural gas (Bcf)	Futures and swaps	—	(0.7)
- NGLs, Refined Products, and crude oil (MMBbl)	Futures and swaps	(1.4)	(0.1)

Cash Flow Hedges - During the three months ended March 31, 2024, we have not had material cash flow hedge activity on our commodity derivative instruments.

Credit Risk - We monitor the creditworthiness of our counterparties and compliance with policies and limits established by our Risk Oversight and Strategy Committee. We maintain credit policies with regard to our counterparties that we believe minimize credit risk. Our policies and related credit risk are consistent with those discussed in our Annual Report.

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DEBT

3 Months Ended

Mar. 31, 2024

Debt Disclosure [Abstract]

DEBT

DEBT

Current Maturities - At March 31, 2024, our current maturities of long-term debt of $1.2 billion consist of $484 million, 2.75% senior notes due September 2024; $250 million, 3.2% senior notes due March 2025; and $500 million, 4.9% senior notes due March 2025.

Commercial Paper Program - At March 31, 2024, we had $320 million of commercial paper outstanding, bearing a weighted-average interest rate of 5.50%. At December 31, 2023, we had no commercial paper outstanding.

$2.5 Billion Credit Agreement - Our $2.5 Billion Credit Agreement, which expires in 2027, is a revolving credit facility and contains certain customary conditions for borrowing, as well as customary financial, affirmative and negative covenants. Among other things, these covenants include maintaining a ratio of consolidated net indebtedness to adjusted EBITDA (EBITDA, as defined in our $2.5 Billion Credit Agreement, adjusted for all noncash charges and increased for projected EBITDA from certain lender-approved capital expansion projects). In addition, adjusted EBITDA as defined in our $2.5 Billion Credit Agreement allows inclusion of the trailing 12 months of consolidated adjusted EBITDA of the acquired business. In March 2024, we acquired additional ownership interest in one of our unconsolidated affiliates, which allowed us to elect an acquisition adjustment period under our $2.5 Billion Credit Agreement and, as a result, increased our leverage ratio covenant to 5.5 to 1 until the quarter ended December 31, 2024, when it will decrease to 5.0 to 1. As of March 31, 2024, we had no outstanding borrowings, our ratio of consolidated indebtedness to adjusted EBITDA was 4.1 to 1, and we were in compliance with all covenants under our $2.5 Billion Credit Agreement.

Debt Guarantees - ONEOK, ONEOK Partners, the Intermediate Partnership and Magellan have cross guarantees in place for ONEOK’s and ONEOK Partners’ indebtedness. The Guardian Term Loan Agreement and Viking Term Loan Agreement are not guaranteed by ONEOK, ONEOK Partners, the Intermediate Partnership or Magellan. For further details on our indebtedness, see Note H of the Notes to Consolidated Financial Statements in our Annual Report.

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EQUITY

3 Months Ended

Mar. 31, 2024

Equity [Abstract]

EQUITY

EQUITY

Dividends - Holders of our common stock share equally in any dividend declared by our Board of Directors, subject to the rights of the holders of outstanding Series E Preferred Stock. Dividends paid on our common stock in February 2024 were 99 cents per share. A common stock dividend of 99 cents per share was declared for shareholders of record at the close of business on May 1, 2024, payable May 15, 2024.

Our Series E Preferred Stock pays quarterly dividends on each share of Series E Preferred Stock when, and if, declared by our Board of Directors, at a rate of 5.5% per year. We paid dividends for the Series E Preferred Stock of $0.3 million in February 2024. Dividends totaling $0.3 million were declared for the Series E Preferred Stock and are payable May 15, 2024.

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EARNINGS PER SHARE

3 Months Ended

Mar. 31, 2024

Earnings Per Share [Abstract]

EARNINGS PER SHARE

EARNINGS PER SHARE

The following tables set forth the computation of basic and diluted EPS for the periods indicated:

	Three Months Ended March 31, 2024
	Income		Shares	Per Share Amount
	(Millions, except per share amounts)
Basic EPS
Net income available for common stock	$	639	584.2	$	1.09
Diluted EPS
Effect of dilutive securities	—		1.5
Net income available for common stock and common stock equivalents	$	639	585.7	$	1.09

	Three Months Ended March 31, 2023
	Income		Shares	Per Share Amount
	(Millions, except per share amounts)
Basic EPS
Net income available for common stock	$	1,049	448.1	$	2.34
Diluted EPS
Effect of dilutive securities	—		0.9
Net income available for common stock and common stock equivalents	$	1,049	449.0	$	2.34

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UNCONSOLIDATED AFFILIATES

3 Months Ended

Mar. 31, 2024

Equity Method Investments and Joint Ventures [Abstract]

UNCONSOLIDATED AFFILIATES

UNCONSOLIDATED AFFILIATES

Equity in Net Earnings from Investments - The following table sets forth our equity in net earnings from investments for the periods indicated:

	Three Months Ended
	March 31,
	2024		2023
	(Millions of dollars)
Northern Border	$	25	$	24
Overland Pass	15		9
Roadrunner	11		7
Saddlehorn	10		—
BridgeTex	7		—
MVP	4		—
Other	4		—
Equity in net earnings from investments	$	76	$	40

In March 2024, we purchased an additional 10% interest in Saddlehorn, resulting in a 40% ownership interest at March 31, 2024.

We incurred expenses in transactions with unconsolidated affiliates of $39 million and $28 million for the three months ended March 31, 2024 and 2023, respectively, related primarily to Overland Pass and Northern Border. Revenue earned and accounts receivable from, and accounts payable to, our unconsolidated affiliates were not material.

We are the operator of Roadrunner, BridgeTex, MVP and Saddlehorn. In each case, we have operating agreements that provide for reimbursement or payment to us for management services and certain operating costs. Reimbursements and payments included in operating income in our Consolidated Statements of Income for all periods presented were not material.

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COMMITMENTS AND CONTINGENCIES

3 Months Ended

Mar. 31, 2024

Commitments and Contingencies Disclosure [Abstract]

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES

Regulatory, Environmental and Safety Matters - The operation of pipelines, terminals, plants and other facilities for the gathering, processing, fractionation, transportation and storage of products is subject to numerous and complex laws and regulations pertaining to health, safety and the environment. As an owner and/or operator of these facilities, we must comply with laws and regulations that relate to air and water quality, hazardous and solid waste management and disposal, cultural resource protection and other environmental and safety matters. The cost of planning, designing, constructing and operating pipelines, terminals, plants and other facilities must incorporate compliance with these laws, regulations and safety standards. Failure to comply with these laws and regulations may trigger a variety of administrative, civil and potentially criminal enforcement measures, including citizen suits, which can include the assessment of monetary penalties, the imposition of remedial requirements and the issuance of injunctions or restrictions on operation or construction. Management does not believe that, based on currently known information, a material risk of noncompliance with these laws and regulations exists that will affect adversely our consolidated results of operations, financial condition or cash flows.

Legal Proceedings - Corpus Christi Terminal Personal Injury Proceeding - Ismael Garcia, Andrew Ramirez and Jesus Juarez Quintero, et al. brought personal injury cases against Magellan and co-defendants Triton Industrial Services, LLC, Tidal Tank, Inc. and Cleveland Integrity Services, Inc. in Nueces County Court in Texas. The claims were originally brought in three different actions but were consolidated into a single case on March 2, 2021. Claims were asserted by or on behalf of seven

individuals, and certain beneficiaries, who were employed by a contractor and working at a Magellan facility. These individuals were injured, one fatally, as a result of a fire that occurred on December 5, 2020, while they were cleaning a tank at our Corpus Christi terminal. During the first quarter of 2024, we reached settlement with all remaining claimants. We recorded accruals that represent the settlement, as well as offsetting insurance receivables for the amounts accrued.

We are a party to various other legal proceedings that have arisen in the normal course of our operations. While the results of these proceedings cannot be predicted with certainty, we believe the reasonably possible losses from such proceedings, individually and in the aggregate, are not material. Additionally, we believe the probable final outcome of such proceedings will not have a material adverse effect on our consolidated results of operations, financial position or cash flows.

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REVENUES

3 Months Ended

Mar. 31, 2024

Revenue from Contract with Customer [Abstract]

REVENUES

REVENUES

Contract Assets and Contract Liabilities - Our contract asset balances at the beginning and the end of the period primarily relate to our firm service transportation contracts with tiered rates, which are not material. The following table sets forth the balances in contract liabilities for the periods indicated:

Contract Liabilities	(Millions of dollars)
Balance at December 31, 2023 (a)	$	150
Revenue recognized included in beginning balance	(109)
Net additions	98
Balance at March 31, 2024 (b)	$	139

(a) - Contract liabilities of $104 million and $46 million are included in other current liabilities and other deferred credits, respectively, in our Consolidated Balance Sheet.

(b) - Contract liabilities of $99 million and $40 million are included in the other current liabilities and other deferred credits, respectively in our Consolidated Balance Sheet.

Receivables from Customers and Revenue Disaggregation - Excluding the insurance receivable related to the legal proceeding described in Note J, substantially all of the balances in accounts receivable on our Consolidated Balance Sheets at March 31, 2024, and December 31, 2023, relate to customer receivables. Revenue sources are disaggregated in Note L.

Unsatisfied Performance Obligations - We do not disclose the value of unsatisfied performance obligations for (i) contracts with an original expected length of one year or less and (ii) variable consideration on contracts for which we recognize revenue at the amount to which we have the right to invoice for services performed.

The following table presents aggregate value allocated to unsatisfied performance obligations as of March 31, 2024, and the amounts we expect to recognize in revenue in future periods, related primarily to firm transportation and storage contracts with remaining contract terms ranging from one month to 20 years:

Expected Period of Recognition in Revenue	(Millions of dollars)
Remainder of 2024	$	924
2025	986
2026	832
2027	735
2028 and beyond	2,192
Total	$	5,669

The table above excludes variable consideration allocated entirely to wholly unsatisfied performance obligations, wholly unsatisfied promises to transfer distinct goods or services that are part of a single performance obligation and consideration we determine to be fully constrained. The amounts we determined to be fully constrained relate to future sales obligations under long-term sales contracts where the value is not known and minimum volume agreements, which we consider to be fully constrained until invoiced.

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SEGMENTS

3 Months Ended

Mar. 31, 2024

Segment Reporting [Abstract]

SEGMENTS

SEGMENTS

Segment Descriptions - Our operations are divided into four reportable business segments as follows:

•    our Natural Gas Gathering and Processing segment gathers, treats, processes and markets natural gas;

•    our Natural Gas Liquids segment gathers, treats, fractionates and transports NGLs and stores, markets and distributes Purity NGLs;

•    our Natural Gas Pipelines segment transports and stores natural gas; and

•    our Refined Products and Crude segment transports, stores, distributes, blends and markets Refined Products and crude oil.

Other and eliminations consist of corporate costs, the operating and leasing activities of our headquarters building and related parking facility, the activity of our wholly owned captive insurance company and eliminations necessary to reconcile our reportable segments to our Consolidated Financial Statements.

Operating Segment Information - The following tables set forth certain selected financial information for our operating segments for the periods indicated:

Three Months Ended March 31, 2024	Natural Gas Gathering and Processing		Natural Gas Liquids		Natural Gas Pipelines		Refined Products and Crude		Total Segments
	(Millions of dollars)
Liquids commodity sales	$	623	$	3,264	$	—	$	351	$	4,238
Residue natural gas sales	344		—		28		—		372
Gathering, processing and exchange services revenue	35		122		—		—		157
Transportation and storage revenue	—		48		157		466		671
Other	8		2		—		27		37
Total revenues (a)	1,010		3,436		185		844		5,475
Cost of sales and fuel (exclusive of depreciation and operating costs)	(594)		(2,698)		(15)		(285)		(3,592)
Operating costs	(117)		(181)		(53)		(217)		(568)
Adjusted EBITDA from unconsolidated affiliates	2		17		47		35		101
Noncash compensation expense and other	5		14		1		4		24
Segment adjusted EBITDA	$	306	$	588	$	165	$	381	$	1,440
Depreciation and amortization	$	(70)	$	(85)	$	(18)	$	(80)	$	(253)
Equity in net earnings from investments	$	2	$	15	$	36	$	23	$	76
Investments in unconsolidated affiliates	$	25	$	414	$	522	$	976	$	1,937
Total assets	$	7,021	$	15,279	$	2,635	$	19,401	$	44,336
Capital expenditures	$	116	$	253	$	79	$	42	$	490

(a) - Intersegment revenues are primarily from commodity sales, which are based on the contracted selling price that is generally index-based and settled monthly. Intersegment revenues for the Natural Gas Gathering and Processing segment totaled $620 million and were not material for the Natural Gas Liquids, Refined Products and Crude and Natural Gas Pipelines segments.

Three Months Ended March 31, 2024	Total Segments		Other and Eliminations		Total
	(Millions of dollars)
Reconciliations of total segments to consolidated
Liquids commodity sales	$	4,238	$	(682)	$	3,556
Residue natural gas sales	372		—		372
Gathering, processing and exchange services revenue	157		—		157
Transportation and storage revenue	671		(7)		664
Other	37		(5)		32
Total revenues (a)	$	5,475	$	(694)	$	4,781
Cost of sales and fuel (exclusive of depreciation and operating costs)	$	(3,592)	$	695	$	(2,897)
Operating costs	$	(568)	$	(4)	$	(572)
Depreciation and amortization	$	(253)	$	(1)	$	(254)
Equity in net earnings from investments	$	76	$	—	$	76
Investments in unconsolidated affiliates	$	1,937	$	2	$	1,939
Total assets	$	44,336	$	54	$	44,390
Capital expenditures	$	490	$	22	$	512

(a) - Substantially all of our revenues relate to contracts with customers.

Three Months Ended March 31, 2023	Natural Gas Gathering and Processing		Natural Gas Liquids		Natural Gas Pipelines		Total Segments
	(Millions of dollars)
NGL and condensate sales	$	644	$	3,551	$	—	$	4,195
Residue natural gas sales	568		—		25		593
Gathering, processing and exchange services revenue	38		131		—		169
Transportation and storage revenue	—		50		145		195
Other	8		3		1		12
Total revenues (a)	1,258		3,735		171		5,164
Cost of sales and fuel (exclusive of depreciation and operating costs)	(875)		(3,095)		(14)		(3,984)
Operating costs	(105)		(152)		(45)		(302)
Adjusted EBITDA from unconsolidated affiliates (b)	1		11		44		56
Noncash compensation expense	4		6		2		12
Other	2		778		—		780
Segment adjusted EBITDA (b)	$	285	$	1,283	$	158	$	1,726
Depreciation and amortization	$	(67)	$	(78)	$	(17)	$	(162)
Equity in net earnings from investments	$	—	$	9	$	31	$	40
Investments in unconsolidated affiliates	$	26	$	413	$	349	$	788
Total assets	$	6,899	$	14,437	$	2,239	$	23,575
Capital expenditures	$	98	$	137	$	46	$	281

(a) - Intersegment revenues are primarily from commodity sales, which are based on the contracted selling price that is generally index-based and settled monthly. Intersegment revenues for the Natural Gas Gathering and Processing segment totaled $631 million and were not material for the Natural Gas Liquids and Natural Gas Pipelines segments.

(b) - Beginning in 2023, we updated our calculation methodology of adjusted EBITDA to include adjusted EBITDA from our unconsolidated affiliates using the same recognition and measurement methods used to record equity in net earnings from investments. This change resulted in an additional $16 million of adjusted EBITDA in the first quarter of 2023.

Three Months Ended March 31, 2023	Total Segments		Other and Eliminations		Total
	(Millions of dollars)
Reconciliations of total segments to consolidated
NGL and condensate sales	$	4,195	$	(634)	$	3,561
Residue natural gas sales	593		—		593
Gathering, processing and exchange services revenue	169		—		169
Transportation and storage revenue	195		(2)		193
Other	12		(7)		5
Total revenues (a)	$	5,164	$	(643)	$	4,521
Cost of sales and fuel (exclusive of depreciation and operating costs)	$	(3,984)	$	637	$	(3,347)
Operating costs	$	(302)	$	6	$	(296)
Depreciation and amortization	$	(162)	$	—	$	(162)
Equity in net earnings from investments	$	40	$	—	$	40
Investments in unconsolidated affiliates	$	788	$	1	$	789
Total assets	$	23,575	$	889	$	24,464
Capital expenditures	$	281	$	8	$	289

(a) - Substantially all of our revenues relate to contracts with customers.

	Three Months Ended March 31,
	2024		2023
Reconciliation of net income to total segment adjusted EBITDA	(Millions of dollars)
Net income	$	639	$	1,049
Interest expense, net of capitalized interest	300		166
Depreciation and amortization	254		162
Income taxes	208		330
Adjusted EBITDA from unconsolidated affiliates (b)	101		56
Equity in net earnings from investments (b)	(76)		(40)
Noncash compensation expense and other	15		10
Other corporate costs	(1)		(7)
Total segment adjusted EBITDA (a)(b)	$	1,440	$	1,726

(a) - The three months ended March 31, 2023, includes $733 million related to the Medford incident, including a settlement gain of $779 million, offset partially by $46 million of third-party fractionation costs.

(b) - Beginning in 2023, we updated our calculation methodology of adjusted EBITDA to include adjusted EBITDA from our unconsolidated affiliates using the same recognition and measurement methods used to record equity in net earnings from investments. This change resulted in an additional $16 million of adjusted EBITDA in the first quarter of 2023.

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	3 Months Ended
	Mar. 31, 2024
Accounting Policies [Abstract]
Basis of Accounting	Our accompanying unaudited Consolidated Financial Statements have been prepared pursuant to the rules and regulations of the SEC. These statements have been prepared in accordance with GAAP and reflect all adjustments that, in our opinion, are necessary for a fair statement of the results for the interim periods presented. All such adjustments are of a normal recurring nature. The 2023 year-end Consolidated Balance Sheet data was derived from our audited Consolidated Financial Statements but does not include all disclosures required by GAAP. These unaudited Consolidated Financial Statements should be read in conjunction with our audited Consolidated Financial Statements in our Annual Report.
Recently Issued Accounting Standards Update	Recently Issued Accounting Standards Update - Changes to GAAP are established by the FASB in the form of ASUs to the FASB Accounting Standards Codification. We consider the applicability and impact of all ASUs. There have been no new accounting pronouncements that have become effective or have been issued that are of significance or potential significance to us during the quarter, and no material updates to recently issued standards disclosed in our Annual Report.
Determining Fair Value	Determining Fair Value - For our fair value measurements, we utilize market prices, third-party pricing services, present value methods and standard option valuation models to determine the price we would receive from the sale of an asset or the transfer of a liability in an orderly transaction at the measurement date. We measure the fair value of a group of financial assets and liabilities consistent with how a market participant would price the net risk exposure at the measurement date. Determining the appropriate classification of our fair value measurements within the fair value hierarchy requires management’s judgment regarding the degree to which market data is observable or corroborated by observable market data. We categorize derivatives based on the lowest level input that is significant to the fair value measurement in its entirety. Our valuation techniques and inputs are consistent with those discussed in Note A of the Notes to Consolidated Financial Statements in our Annual Report.

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FAIR VALUE MEASUREMENTS (Tables)

3 Months Ended

Mar. 31, 2024

Fair Value Disclosures [Abstract]

Recurring Fair Value Measurements

The following tables set forth our recurring fair value measurements as of the dates indicated:

	March 31, 2024
	Level 1		Level 2		Level 3		Total - Gross		Netting (a)		Total - Net
	(Millions of dollars)
Derivative assets
Commodity contracts	$	58	$	57	$	—	$	115	$	(114)	$	1
Total derivative assets	$	58	$	57	$	—	$	115	$	(114)	$	1
Derivative liabilities
Commodity contracts	$	(94)	$	(83)	$	—	$	(177)	$	177	$	—
Total derivative liabilities	$	(94)	$	(83)	$	—	$	(177)	$	177	$	—

(a) - Derivative assets and liabilities are presented in our Consolidated Balance Sheet on a net basis. We net derivative assets and liabilities when a legally enforceable master-netting arrangement exists between the counterparty to a derivative contract and us. At March 31, 2024, we held no cash and posted cash of $129 million with various counterparties, including $63 million of cash collateral that is offsetting derivative net liability positions under master-netting arrangements in the table above. The remaining $66 million of cash collateral in excess of derivative net liability positions is included in other current assets in our Consolidated Balance Sheet.

	December 31, 2023
	Level 1		Level 2		Level 3		Total - Gross		Netting (a)		Total - Net
	(Millions of dollars)
Derivative assets
Commodity contracts	$	109	$	68	$	—	$	177	$	(125)	$	52
Total derivative assets	$	109	$	68	$	—	$	177	$	(125)	$	52
Derivative liabilities
Commodity contracts	$	(40)	$	(44)	$	—	$	(84)	$	84	$	—
Total derivative liabilities	$	(40)	$	(44)	$	—	$	(84)	$	84	$	—

(a) - Derivative assets and liabilities are presented in our Consolidated Balance Sheet on a net basis. We net derivative assets and liabilities when a legally enforceable master-netting arrangement exists between the counterparty to a derivative contract and us. At December 31, 2023, we posted no cash and held cash of $41 million with various counterparties, which offsets our derivative net asset position under master netting arrangements as shown in the table above.

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RISK-MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES (Tables)

3 Months Ended

Mar. 31, 2024

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Fair Value of Derivatives

The following table sets forth the fair values of our derivative instruments presented on a gross basis as of the dates indicated:

		March 31, 2024				December 31, 2023
	Location in our Consolidated Balance Sheets	Assets		(Liabilities)		Assets		(Liabilities)
Derivatives designated as hedging instruments		(Millions of dollars)
Commodity contracts (a)(b)	Other current assets	$	103	$	(164)	$	163	$	(78)
Total derivatives designated as hedging instruments		103		(164)		163		(78)
Derivatives not designated as hedging instruments
Commodity contracts (a)(b)	Other current assets	12		(13)		14		(6)
Total derivatives not designated as hedging instruments		12		(13)		14		(6)
Total derivatives		$	115	$	(177)	$	177	$	(84)

(a) - Derivative assets and liabilities are presented in our Consolidated Balance Sheets on a net basis when a legally enforceable master-netting arrangement exists between the counterparty to a derivative contract and us.

(b) - At March 31, 2024, our derivative net liability positions under master-netting arrangements for financial commodity contracts were offset by cash collateral of $63 million.

Notional Amounts of Derivative Instruments

The following table sets forth the notional quantities for derivative instruments held as of the dates indicated:

		March 31, 2024	December 31, 2023
	Contract Type	Net Purchased/Payor (Sold/Receiver)
Derivatives designated as hedging instruments:
Cash flow hedges
Fixed price
- Natural gas (Bcf)	Futures and swaps	(17.4)	(16.0)
- NGLs, Refined Products and crude oil (MMBbl)	Futures and swaps	(16.0)	(14.5)
- Power (GWh)	Futures and swaps	22.1	22.1
Basis
- Natural gas (Bcf)	Futures and swaps	(17.2)	(16.0)
Derivatives not designated as hedging instruments:
Fixed price
- Natural gas (Bcf)	Futures and swaps	—	(0.7)
- NGLs, Refined Products and crude oil (MMBbl)	Futures and swaps	(0.6)	0.1
Basis
- Natural gas (Bcf)	Futures and swaps	—	(0.7)
- NGLs, Refined Products, and crude oil (MMBbl)	Futures and swaps	(1.4)	(0.1)

Schedule of Cash Flow Hedging Instruments Effect on Comprehensive Income (Loss)

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EARNINGS PER SHARE (Tables)

3 Months Ended

Mar. 31, 2024

Earnings Per Share [Abstract]

Earnings Per Share

The following tables set forth the computation of basic and diluted EPS for the periods indicated:

	Three Months Ended March 31, 2024
	Income		Shares	Per Share Amount
	(Millions, except per share amounts)
Basic EPS
Net income available for common stock	$	639	584.2	$	1.09
Diluted EPS
Effect of dilutive securities	—		1.5
Net income available for common stock and common stock equivalents	$	639	585.7	$	1.09

	Three Months Ended March 31, 2023
	Income		Shares	Per Share Amount
	(Millions, except per share amounts)
Basic EPS
Net income available for common stock	$	1,049	448.1	$	2.34
Diluted EPS
Effect of dilutive securities	—		0.9
Net income available for common stock and common stock equivalents	$	1,049	449.0	$	2.34

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UNCONSOLIDATED AFFILIATES (Tables)

3 Months Ended

Mar. 31, 2024

Equity Method Investments and Joint Ventures [Abstract]

Schedule of Equity Method Investments

The following table sets forth our equity in net earnings from investments for the periods indicated:

	Three Months Ended
	March 31,
	2024		2023
	(Millions of dollars)
Northern Border	$	25	$	24
Overland Pass	15		9
Roadrunner	11		7
Saddlehorn	10		—
BridgeTex	7		—
MVP	4		—
Other	4		—
Equity in net earnings from investments	$	76	$	40

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REVENUES (Tables)

3 Months Ended

Mar. 31, 2024

Revenue from Contract with Customer [Abstract]

Contract with Customer, Asset and Liability

The following table sets forth the balances in contract liabilities for the periods indicated:

Contract Liabilities	(Millions of dollars)
Balance at December 31, 2023 (a)	$	150
Revenue recognized included in beginning balance	(109)
Net additions	98
Balance at March 31, 2024 (b)	$	139

(a) - Contract liabilities of $104 million and $46 million are included in other current liabilities and other deferred credits, respectively, in our Consolidated Balance Sheet.

(b) - Contract liabilities of $99 million and $40 million are included in the other current liabilities and other deferred credits, respectively in our Consolidated Balance Sheet.

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction

The following table presents aggregate value allocated to unsatisfied performance obligations as of March 31, 2024, and the amounts we expect to recognize in revenue in future periods, related primarily to firm transportation and storage contracts with remaining contract terms ranging from one month to 20 years:

Expected Period of Recognition in Revenue	(Millions of dollars)
Remainder of 2024	$	924
2025	986
2026	832
2027	735
2028 and beyond	2,192
Total	$	5,669

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SEGMENTS (Tables)

3 Months Ended

Mar. 31, 2024

Segment Reporting [Abstract]

Segments

The following tables set forth certain selected financial information for our operating segments for the periods indicated:

Three Months Ended March 31, 2024	Natural Gas Gathering and Processing		Natural Gas Liquids		Natural Gas Pipelines		Refined Products and Crude		Total Segments
	(Millions of dollars)
Liquids commodity sales	$	623	$	3,264	$	—	$	351	$	4,238
Residue natural gas sales	344		—		28		—		372
Gathering, processing and exchange services revenue	35		122		—		—		157
Transportation and storage revenue	—		48		157		466		671
Other	8		2		—		27		37
Total revenues (a)	1,010		3,436		185		844		5,475
Cost of sales and fuel (exclusive of depreciation and operating costs)	(594)		(2,698)		(15)		(285)		(3,592)
Operating costs	(117)		(181)		(53)		(217)		(568)
Adjusted EBITDA from unconsolidated affiliates	2		17		47		35		101
Noncash compensation expense and other	5		14		1		4		24
Segment adjusted EBITDA	$	306	$	588	$	165	$	381	$	1,440
Depreciation and amortization	$	(70)	$	(85)	$	(18)	$	(80)	$	(253)
Equity in net earnings from investments	$	2	$	15	$	36	$	23	$	76
Investments in unconsolidated affiliates	$	25	$	414	$	522	$	976	$	1,937
Total assets	$	7,021	$	15,279	$	2,635	$	19,401	$	44,336
Capital expenditures	$	116	$	253	$	79	$	42	$	490

(a) - Intersegment revenues are primarily from commodity sales, which are based on the contracted selling price that is generally index-based and settled monthly. Intersegment revenues for the Natural Gas Gathering and Processing segment totaled $620 million and were not material for the Natural Gas Liquids, Refined Products and Crude and Natural Gas Pipelines segments.

Three Months Ended March 31, 2024	Total Segments		Other and Eliminations		Total
	(Millions of dollars)
Reconciliations of total segments to consolidated
Liquids commodity sales	$	4,238	$	(682)	$	3,556
Residue natural gas sales	372		—		372
Gathering, processing and exchange services revenue	157		—		157
Transportation and storage revenue	671		(7)		664
Other	37		(5)		32
Total revenues (a)	$	5,475	$	(694)	$	4,781
Cost of sales and fuel (exclusive of depreciation and operating costs)	$	(3,592)	$	695	$	(2,897)
Operating costs	$	(568)	$	(4)	$	(572)
Depreciation and amortization	$	(253)	$	(1)	$	(254)
Equity in net earnings from investments	$	76	$	—	$	76
Investments in unconsolidated affiliates	$	1,937	$	2	$	1,939
Total assets	$	44,336	$	54	$	44,390
Capital expenditures	$	490	$	22	$	512

(a) - Substantially all of our revenues relate to contracts with customers.

Three Months Ended March 31, 2023	Natural Gas Gathering and Processing		Natural Gas Liquids		Natural Gas Pipelines		Total Segments
	(Millions of dollars)
NGL and condensate sales	$	644	$	3,551	$	—	$	4,195
Residue natural gas sales	568		—		25		593
Gathering, processing and exchange services revenue	38		131		—		169
Transportation and storage revenue	—		50		145		195
Other	8		3		1		12
Total revenues (a)	1,258		3,735		171		5,164
Cost of sales and fuel (exclusive of depreciation and operating costs)	(875)		(3,095)		(14)		(3,984)
Operating costs	(105)		(152)		(45)		(302)
Adjusted EBITDA from unconsolidated affiliates (b)	1		11		44		56
Noncash compensation expense	4		6		2		12
Other	2		778		—		780
Segment adjusted EBITDA (b)	$	285	$	1,283	$	158	$	1,726
Depreciation and amortization	$	(67)	$	(78)	$	(17)	$	(162)
Equity in net earnings from investments	$	—	$	9	$	31	$	40
Investments in unconsolidated affiliates	$	26	$	413	$	349	$	788
Total assets	$	6,899	$	14,437	$	2,239	$	23,575
Capital expenditures	$	98	$	137	$	46	$	281

(a) - Intersegment revenues are primarily from commodity sales, which are based on the contracted selling price that is generally index-based and settled monthly. Intersegment revenues for the Natural Gas Gathering and Processing segment totaled $631 million and were not material for the Natural Gas Liquids and Natural Gas Pipelines segments.

(b) - Beginning in 2023, we updated our calculation methodology of adjusted EBITDA to include adjusted EBITDA from our unconsolidated affiliates using the same recognition and measurement methods used to record equity in net earnings from investments. This change resulted in an additional $16 million of adjusted EBITDA in the first quarter of 2023.

Three Months Ended March 31, 2023	Total Segments		Other and Eliminations		Total
	(Millions of dollars)
Reconciliations of total segments to consolidated
NGL and condensate sales	$	4,195	$	(634)	$	3,561
Residue natural gas sales	593		—		593
Gathering, processing and exchange services revenue	169		—		169
Transportation and storage revenue	195		(2)		193
Other	12		(7)		5
Total revenues (a)	$	5,164	$	(643)	$	4,521
Cost of sales and fuel (exclusive of depreciation and operating costs)	$	(3,984)	$	637	$	(3,347)
Operating costs	$	(302)	$	6	$	(296)
Depreciation and amortization	$	(162)	$	—	$	(162)
Equity in net earnings from investments	$	40	$	—	$	40
Investments in unconsolidated affiliates	$	788	$	1	$	789
Total assets	$	23,575	$	889	$	24,464
Capital expenditures	$	281	$	8	$	289

(a) - Substantially all of our revenues relate to contracts with customers.

	Three Months Ended March 31,
	2024		2023
Reconciliation of net income to total segment adjusted EBITDA	(Millions of dollars)
Net income	$	639	$	1,049
Interest expense, net of capitalized interest	300		166
Depreciation and amortization	254		162
Income taxes	208		330
Adjusted EBITDA from unconsolidated affiliates (b)	101		56
Equity in net earnings from investments (b)	(76)		(40)
Noncash compensation expense and other	15		10
Other corporate costs	(1)		(7)
Total segment adjusted EBITDA (a)(b)	$	1,440	$	1,726

(a) - The three months ended March 31, 2023, includes $733 million related to the Medford incident, including a settlement gain of $779 million, offset partially by $46 million of third-party fractionation costs.

(b) - Beginning in 2023, we updated our calculation methodology of adjusted EBITDA to include adjusted EBITDA from our unconsolidated affiliates using the same recognition and measurement methods used to record equity in net earnings from investments. This change resulted in an additional $16 million of adjusted EBITDA in the first quarter of 2023.

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MAGELLAN ACQUISITION - Narrative (Details) - Magellan Acquisition $ / shares in Units, $ in Millions	Sep. 25, 2023 USD ($) $ / shares shares
Business Acquisition [Line Items]
ONEOK exchange ratio per Magellan unit (in shares) | shares	0.667
Cash consideration per Magellan unit (in dollars per share) | $ / shares	$ 25.00
Business combination, consideration transferred	$ 14,100
Shares of ONEOK common stock issued (in shares) | shares	135,000,000
Proceeds from issuance of senior debt	$ 5,250
Common Stock Issued
Business Acquisition [Line Items]
Equity consideration	$ 9,000

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MEDFORD INCIDENT (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended	15 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2023
Business Interruption Loss [Line Items]
Gain on business interruption insurance recovery	$ 0	$ 779
Medford Incident | Insurance Recoveries
Business Interruption Loss [Line Items]
Unusual item, insurance proceeds				$ 930
Medford Incident | Insurance Recoveries in 2022
Business Interruption Loss [Line Items]
Unusual item, insurance proceeds			$ 100
Medford Incident | Business Interruption - Settlement Proceeds Received in 2023
Business Interruption Loss [Line Items]
Unusual item, insurance proceeds		830	830
Medford Incident | Business Interruption - Settlement Proceeds
Business Interruption Loss [Line Items]
Outstanding insurance receivable			51
Gain on business interruption insurance recovery		$ 779	$ 779

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FAIR VALUE MEASUREMENTS - Recurring Fair Value Measurements (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Derivative liabilities
Cash held - offsetting derivative net asset positions under master- netting arrangements	$ 0	$ 0
Cash posted - total	129	41
Cash posted - offsetting derivative net liability positions under master-netting arrangements	63
Long-term debt	21,700	21,700
Current Assets
Derivative liabilities
Cash posted - offsetting derivative net liability positions under master-netting arrangements	66
Fair Value, Recurring
Derivative assets
Derivative assets netting	(114)	(125)
Derivative assets	1	52
Derivative liabilities
Derivative liabilities netting	177	84
Derivative liabilities	0	0
Fair Value, Recurring | Commodity contracts
Derivative assets
Derivative assets netting	(114)	(125)
Derivative assets	1	52
Derivative liabilities
Derivative liabilities netting	177	84
Derivative liabilities	0	0
Fair Value, Recurring | Gross Fair Value Measurement
Derivative assets
Derivative asset, fair value, gross	115	177
Derivative liabilities
Derivative liability, fair value, gross	(177)	(84)
Fair Value, Recurring | Gross Fair Value Measurement | Commodity contracts
Derivative assets
Derivative asset, fair value, gross	115	177
Derivative liabilities
Derivative liability, fair value, gross	(177)	(84)
Fair Value, Recurring | Level 1
Derivative assets
Derivative asset, fair value, gross	58	109
Derivative liabilities
Derivative liability, fair value, gross	(94)	(40)
Fair Value, Recurring | Level 1 | Commodity contracts
Derivative assets
Derivative asset, fair value, gross	58	109
Derivative liabilities
Derivative liability, fair value, gross	(94)	(40)
Fair Value, Recurring | Level 2
Derivative assets
Derivative asset, fair value, gross	57	68
Derivative liabilities
Derivative liability, fair value, gross	(83)	(44)
Fair Value, Recurring | Level 2 | Commodity contracts
Derivative assets
Derivative asset, fair value, gross	57	68
Derivative liabilities
Derivative liability, fair value, gross	(83)	(44)
Fair Value, Recurring | Level 3
Derivative assets
Derivative asset, fair value, gross	0	0
Derivative liabilities
Derivative liability, fair value, gross	0	0
Fair Value, Recurring | Level 3 | Commodity contracts
Derivative assets
Derivative asset, fair value, gross	0	0
Derivative liabilities
Derivative liability, fair value, gross	$ 0	$ 0

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FAIR VALUE MEASUREMENTS - Narrative (Details) - USD ($) $ in Billions	Mar. 31, 2024	Dec. 31, 2023
Fair Value Disclosures [Abstract]
Long-term debt, fair value	$ 21.0	$ 21.4
Long-term debt	$ 21.7	$ 21.7

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RISK-MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES - Fair Value of Derivative Instruments (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Assets	$ 115	$ 177
(Liabilities)	(177)	(84)
Cash posted - offsetting derivative net liability positions under master-netting arrangements	63
Derivatives designated as hedging instruments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Assets	103	163
(Liabilities)	(164)	(78)
Derivatives not designated as hedging instruments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Assets	12	14
(Liabilities)	(13)	(6)
Financial contracts | Other current assets | Commodity Contract | Derivatives designated as hedging instruments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Assets	103	163
(Liabilities)	(164)	(78)
Financial contracts | Other current assets | Commodity Contract | Derivatives not designated as hedging instruments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Assets	12	14
(Liabilities)	$ (13)	$ (6)

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RISK-MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES - Notional Quantities for Derivative Instruments (Details) - Futures and swaps	3 Months Ended	12 Months Ended
	Mar. 31, 2024 GWh Bcf MMBbls	Dec. 31, 2022 GWh Bcf MMBbls
Derivatives designated as hedging instruments | - Natural gas (Bcf) | Fixed price | Sold / Receiver
Derivative [Line Items]
Derivative, nonmonetary notional amount, volume | Bcf	17.4	16.0
Derivatives designated as hedging instruments | - Natural gas (Bcf) | Basis | Sold / Receiver
Derivative [Line Items]
Derivative, nonmonetary notional amount, volume | Bcf	17.2	16.0
Derivatives designated as hedging instruments | - NGLs, Refined Products and crude oil (MMBbl) | Fixed price | Sold / Receiver
Derivative [Line Items]
Derivative, nonmonetary notional amount, volume | MMBbls	16.0	14.5
Derivatives designated as hedging instruments | - Power (GWh) | Fixed price | Net Purchased / Payor
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | GWh	22,100	22,100,000
Derivatives not designated as hedging instruments | - Natural gas (Bcf) | Fixed price | Sold / Receiver
Derivative [Line Items]
Derivative, nonmonetary notional amount, volume | Bcf	0	0.7
Derivatives not designated as hedging instruments | - Natural gas (Bcf) | Basis | Sold / Receiver
Derivative [Line Items]
Derivative, nonmonetary notional amount, volume | Bcf	0	0.7
Derivatives not designated as hedging instruments | - NGLs, Refined Products and crude oil (MMBbl) | Fixed price | Sold / Receiver
Derivative [Line Items]
Derivative, nonmonetary notional amount, volume | MMBbls	0.6
Derivatives not designated as hedging instruments | - NGLs, Refined Products and crude oil (MMBbl) | Fixed price | Net Purchased / Payor
Derivative [Line Items]
Derivative, nonmonetary notional amount, volume | MMBbls		0.1
Derivatives not designated as hedging instruments | - NGLs, Refined Products, and crude oil (MMBbl) | Basis | Sold / Receiver
Derivative [Line Items]
Derivative, nonmonetary notional amount, volume | MMBbls	1.4	0.1

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DEBT (Details) - USD ($)	Mar. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Current maturities of long-term debt (Note F)	$ 1,234,000,000	$ 484,000,000
Short-term borrowings (Note F)	320,000,000	0
Commercial Paper
Debt Instrument [Line Items]
Short-term borrowings (Note F)	$ 320,000,000	$ 0
Debt, weighted average interest rate	5.50%
Senior Notes Due September 2024
Debt Instrument [Line Items]
Current maturities of long-term debt (Note F)	$ 484,000,000
Interest rate (as a percent)	2.75%
Senior Notes Due March 2025 One
Debt Instrument [Line Items]
Current maturities of long-term debt (Note F)	$ 250,000,000
Interest rate (as a percent)	3.20%
Senior Notes Due March 2025 Two
Debt Instrument [Line Items]
Current maturities of long-term debt (Note F)	$ 500,000,000
Interest rate (as a percent)	4.90%
$2.5 Billion Credit Agreement
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 2,500,000,000
Indebtedness to adjusted EBITDA, maximum from acquisitions	5.5
Indebtedness to adjusted EBITDA maximum	5
Line of credit facility, amount outstanding	$ 0
Indebtedness to adjusted EBITDA, current	4.1

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EQUITY (Details) - USD ($) $ / shares in Units, $ in Millions				1 Months Ended				3 Months Ended
	May 01, 2024	Nov. 14, 2023	Sep. 25, 2023	Feb. 29, 2024	Aug. 31, 2023	May 31, 2023	Feb. 28, 2023	Mar. 31, 2024	Mar. 31, 2023
Option Indexed to Issuer's Equity [Line Items]
Common stock dividends paid (in dollars per share)				$ 0.99				$ 0.99	$ 0.955
Preferred stock dividends								$ 0.0	$ 0.0
Forecast
Option Indexed to Issuer's Equity [Line Items]
Common stock, dividends, declared (in dollars per share)	$ 99
Series E Preferred Stock
Option Indexed to Issuer's Equity [Line Items]
Preferred stock, dividend rate, percentage (as a percent)								5.50%
Dividends, preferred stock, cash paid					$ 0.3	$ 0.3	$ 0.3
Preferred stock dividends		$ 0.3
Magellan Acquisition
Option Indexed to Issuer's Equity [Line Items]
ONEOK exchange ratio per Magellan unit (in shares)			0.667
Cash consideration per Magellan unit (in dollars per share)			$ 25.00
Shares of ONEOK common stock issued (in shares)			135,000,000
Magellan Acquisition | Common Stock Issued
Option Indexed to Issuer's Equity [Line Items]
Equity consideration			$ 9,000.0

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EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Basic EPS
Net income available for common stock	$ 639	$ 1,049
Basic average shares (in shares)	584.2	448.1
Earnings per share, basic (in dollars per share)	$ 1.09	$ 2.34
Diluted EPS
Effect of dilutive securities	$ 0	$ 0
Effect of dilutive securities, shares (in shares)	1.5	0.9
Net income available to common stock holders, diluted	$ 639	$ 1,049
Diluted average shares (in shares)	585.7	449.0
Earnings per share, diluted (in dollars per share)	$ 1.09	$ 2.34

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UNCONSOLIDATED AFFILIATES - Equity in Net Earnings from Investments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Schedule of Equity Method Investments [Line Items]
Equity in net earnings from investments	$ 76	$ 40
Northern Border
Schedule of Equity Method Investments [Line Items]
Equity in net earnings from investments	25	24
Overland Pass
Schedule of Equity Method Investments [Line Items]
Equity in net earnings from investments	15	9
Roadrunner
Schedule of Equity Method Investments [Line Items]
Equity in net earnings from investments	11	7
Saddlehorn
Schedule of Equity Method Investments [Line Items]
Equity in net earnings from investments	10	0
BridgeTex
Schedule of Equity Method Investments [Line Items]
Equity in net earnings from investments	7	0
MVP
Schedule of Equity Method Investments [Line Items]
Equity in net earnings from investments	4	0
Other
Schedule of Equity Method Investments [Line Items]
Equity in net earnings from investments	$ 4	$ 0

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UNCONSOLIDATED AFFILIATES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Saddlehorn
Investments in and Advances to Affiliates [Line Items]
Additional ownership percentage acquired	10.00%
Ownership percentage, equity method investment	40.00%
Unconsolidated Affiliates
Investments in and Advances to Affiliates [Line Items]
Unconsolidated entities expenses in transactions	$ 39	$ 28

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REVENUES - Contract Assets and Contract Liabilities (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Contract with Customer Liability [Roll Forward]
Contract with customer, liability, beginning balance	$ 139	$ 150
Revenue recognized included in beginning balance	(109)
Net additions	98
Contract with customer, liability, ending balance	139
Contract with customer, liability, current	99	104
Contract with customer, liability, noncurrent	$ 40	$ 46

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REVENUES - Performance Obligations (Details) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 5,669
Minimum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 month
Maximum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	20 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 924
Revenue, remaining performance obligation, expected timing of satisfaction, period	9 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 986
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 832
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 735
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 2,192
Revenue, remaining performance obligation, expected timing of satisfaction, period

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SEGMENTS - Operating Segments Financial Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($) segment	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment	4
Total revenues (Note K)	$ 4,781	$ 4,521
Cost of sales and fuel (exclusive of depreciation and operating costs)	(2,897)	(3,347)
Operating costs	(572)	(296)
Adjusted EBITDA from unconsolidated affiliates	101	56
Noncash compensation expense and other	15	10
Segment adjusted EBITDA	1,440	1,726
Equity in net earnings from investments	(254)	(162)
Depreciation and amortization	76	40
Investments in unconsolidated affiliates	1,939	789	$ 1,874
Total assets	44,390	24,464	$ 44,266
Capital expenditures	512	289
Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	5,475	5,164
Cost of sales and fuel (exclusive of depreciation and operating costs)	(3,592)	(3,984)
Operating costs	(568)	(302)
Adjusted EBITDA from unconsolidated affiliates	101
Noncash compensation expense and other	24	12
Segment adjusted EBITDA	1,440	1,726
Equity in net earnings from investments	(253)	(162)
Depreciation and amortization	76	40
Investments in unconsolidated affiliates	1,937	788
Total assets	44,336	23,575
Capital expenditures	490	281
Natural Gas Gathering and Processing | Natural Gas Gathering and Processing Intersegment
Segment Reporting Information [Line Items]
Total revenues (Note K)	620	631
Natural Gas Gathering and Processing | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	1,010	1,258
Cost of sales and fuel (exclusive of depreciation and operating costs)	(594)	(875)
Operating costs	(117)	(105)
Adjusted EBITDA from unconsolidated affiliates	2	1
Noncash compensation expense and other	5	4
Segment adjusted EBITDA	306	285
Equity in net earnings from investments	(70)	(67)
Depreciation and amortization	2	0
Investments in unconsolidated affiliates	25	26
Total assets	7,021	6,899
Capital expenditures	116	98
Natural Gas Liquids | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	3,436	3,735
Cost of sales and fuel (exclusive of depreciation and operating costs)	(2,698)	(3,095)
Operating costs	(181)	(152)
Adjusted EBITDA from unconsolidated affiliates	17	11
Noncash compensation expense and other	14	6
Segment adjusted EBITDA	588	1,283
Equity in net earnings from investments	(85)	(78)
Depreciation and amortization	15	9
Investments in unconsolidated affiliates	414	413
Total assets	15,279	14,437
Capital expenditures	253	137
Natural Gas Pipelines | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	185	171
Cost of sales and fuel (exclusive of depreciation and operating costs)	(15)	(14)
Operating costs	(53)	(45)
Adjusted EBITDA from unconsolidated affiliates	47	44
Noncash compensation expense and other	1	2
Segment adjusted EBITDA	165	158
Equity in net earnings from investments	(18)	(17)
Depreciation and amortization	36	31
Investments in unconsolidated affiliates	522	349
Total assets	2,635	2,239
Capital expenditures	79	46
Refined Products and Crude | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	844
Cost of sales and fuel (exclusive of depreciation and operating costs)	(285)
Operating costs	(217)
Adjusted EBITDA from unconsolidated affiliates	35	56
Noncash compensation expense and other	4
Segment adjusted EBITDA	381
Equity in net earnings from investments	(80)	(162)
Depreciation and amortization	23	40
Investments in unconsolidated affiliates	976	788
Total assets	19,401	23,575
Capital expenditures	42	281
Liquids commodity sales
Segment Reporting Information [Line Items]
Total revenues (Note K)	3,556
Liquids commodity sales | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	4,238
Liquids commodity sales | Natural Gas Gathering and Processing | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	623
Liquids commodity sales | Natural Gas Liquids | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	3,264
Liquids commodity sales | Natural Gas Pipelines | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	0
Liquids commodity sales | Refined Products and Crude | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	351
Residue natural gas sales
Segment Reporting Information [Line Items]
Total revenues (Note K)	372	593
Residue natural gas sales | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	372	593
Residue natural gas sales | Natural Gas Gathering and Processing | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	344	568
Residue natural gas sales | Natural Gas Liquids | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	0	0
Residue natural gas sales | Natural Gas Pipelines | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	28	25
Residue natural gas sales | Refined Products and Crude | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	0
Gathering, processing and exchange services revenue
Segment Reporting Information [Line Items]
Total revenues (Note K)	157	169
Gathering, processing and exchange services revenue | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	157	169
Gathering, processing and exchange services revenue | Natural Gas Gathering and Processing | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	35	38
Gathering, processing and exchange services revenue | Natural Gas Liquids | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	122	131
Gathering, processing and exchange services revenue | Natural Gas Pipelines | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	0	0
Gathering, processing and exchange services revenue | Refined Products and Crude | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	0
Transportation and storage revenue
Segment Reporting Information [Line Items]
Total revenues (Note K)	664	193
Transportation and storage revenue | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	671	195
Transportation and storage revenue | Natural Gas Gathering and Processing | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	0	0
Transportation and storage revenue | Natural Gas Liquids | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	48	50
Transportation and storage revenue | Natural Gas Pipelines | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	157	145
Transportation and storage revenue | Refined Products and Crude | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	466
Other
Segment Reporting Information [Line Items]
Total revenues (Note K)	32	5
Other | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	37	12
Other | Natural Gas Gathering and Processing | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	8	8
Other | Natural Gas Liquids | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	2	3
Other | Natural Gas Pipelines | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	0	$ 1
Other | Refined Products and Crude | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	$ 27

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SEGMENTS - Reconciliations for Segments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Segment Reporting Information [Line Items]
Total revenues (Note K)	$ 4,781	$ 4,521
Cost of sales and fuel (exclusive of depreciation and operating costs)	(2,897)	(3,347)
Operating costs	(572)	(296)
Adjusted EBITDA from unconsolidated affiliates	101	56
Noncash compensation expense and other	15	10
Other	6	781
Segment adjusted EBITDA	1,440	1,726
Equity in net earnings from investments	(254)	(162)
Depreciation and amortization	76	40
Investments in unconsolidated affiliates	1,939	789	$ 1,874
Total assets	44,390	24,464	$ 44,266
Capital expenditures	512	289
Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	5,475	5,164
Cost of sales and fuel (exclusive of depreciation and operating costs)	(3,592)	(3,984)
Operating costs	(568)	(302)
Adjusted EBITDA from unconsolidated affiliates	101
Noncash compensation expense and other	24	12
Other		780
Segment adjusted EBITDA	1,440	1,726
Equity in net earnings from investments	(253)	(162)
Depreciation and amortization	76	40
Investments in unconsolidated affiliates	1,937	788
Total assets	44,336	23,575
Capital expenditures	490	281
Operating segments | Natural Gas Gathering and Processing
Segment Reporting Information [Line Items]
Total revenues (Note K)	1,010	1,258
Cost of sales and fuel (exclusive of depreciation and operating costs)	(594)	(875)
Operating costs	(117)	(105)
Adjusted EBITDA from unconsolidated affiliates	2	1
Noncash compensation expense and other	5	4
Other		2
Segment adjusted EBITDA	306	285
Equity in net earnings from investments	(70)	(67)
Depreciation and amortization	2	0
Investments in unconsolidated affiliates	25	26
Total assets	7,021	6,899
Capital expenditures	116	98
Operating segments | Natural Gas Liquids
Segment Reporting Information [Line Items]
Total revenues (Note K)	3,436	3,735
Cost of sales and fuel (exclusive of depreciation and operating costs)	(2,698)	(3,095)
Operating costs	(181)	(152)
Adjusted EBITDA from unconsolidated affiliates	17	11
Noncash compensation expense and other	14	6
Other		778
Segment adjusted EBITDA	588	1,283
Equity in net earnings from investments	(85)	(78)
Depreciation and amortization	15	9
Investments in unconsolidated affiliates	414	413
Total assets	15,279	14,437
Capital expenditures	253	137
Operating segments | Natural Gas Pipelines
Segment Reporting Information [Line Items]
Total revenues (Note K)	185	171
Cost of sales and fuel (exclusive of depreciation and operating costs)	(15)	(14)
Operating costs	(53)	(45)
Adjusted EBITDA from unconsolidated affiliates	47	44
Noncash compensation expense and other	1	2
Other		0
Segment adjusted EBITDA	165	158
Equity in net earnings from investments	(18)	(17)
Depreciation and amortization	36	31
Investments in unconsolidated affiliates	522	349
Total assets	2,635	2,239
Capital expenditures	79	46
Operating segments | - NGLs, Refined Products, and crude oil (MMBbl)
Segment Reporting Information [Line Items]
Total revenues (Note K)	844
Cost of sales and fuel (exclusive of depreciation and operating costs)	(285)
Operating costs	(217)
Adjusted EBITDA from unconsolidated affiliates	35	56
Noncash compensation expense and other	4
Segment adjusted EBITDA	381
Equity in net earnings from investments	(80)	(162)
Depreciation and amortization	23	40
Investments in unconsolidated affiliates	976	788
Total assets	19,401	23,575
Capital expenditures	42	281
Other and eliminations
Segment Reporting Information [Line Items]
Total revenues (Note K)	(694)	(643)
Cost of sales and fuel (exclusive of depreciation and operating costs)	695	637
Operating costs	(4)	6
Equity in net earnings from investments	(1)	0
Depreciation and amortization	0	0
Investments in unconsolidated affiliates	2	1
Total assets	54	889
Capital expenditures	22	8
Liquids commodity sales
Segment Reporting Information [Line Items]
Total revenues (Note K)		3,561
Liquids commodity sales | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)		4,195
Liquids commodity sales | Operating segments | Natural Gas Gathering and Processing
Segment Reporting Information [Line Items]
Total revenues (Note K)		644
Liquids commodity sales | Operating segments | Natural Gas Liquids
Segment Reporting Information [Line Items]
Total revenues (Note K)		3,551
Liquids commodity sales | Operating segments | Natural Gas Pipelines
Segment Reporting Information [Line Items]
Total revenues (Note K)		0
Liquids commodity sales | Other and eliminations
Segment Reporting Information [Line Items]
Total revenues (Note K)		(634)
Residue natural gas sales
Segment Reporting Information [Line Items]
Total revenues (Note K)	372	593
Residue natural gas sales | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	372	593
Residue natural gas sales | Operating segments | Natural Gas Gathering and Processing
Segment Reporting Information [Line Items]
Total revenues (Note K)	344	568
Residue natural gas sales | Operating segments | Natural Gas Liquids
Segment Reporting Information [Line Items]
Total revenues (Note K)	0	0
Residue natural gas sales | Operating segments | Natural Gas Pipelines
Segment Reporting Information [Line Items]
Total revenues (Note K)	28	25
Residue natural gas sales | Operating segments | - NGLs, Refined Products, and crude oil (MMBbl)
Segment Reporting Information [Line Items]
Total revenues (Note K)	0
Residue natural gas sales | Other and eliminations
Segment Reporting Information [Line Items]
Total revenues (Note K)	0	0
Gathering, processing and exchange services revenue
Segment Reporting Information [Line Items]
Total revenues (Note K)	157	169
Gathering, processing and exchange services revenue | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	157	169
Gathering, processing and exchange services revenue | Operating segments | Natural Gas Gathering and Processing
Segment Reporting Information [Line Items]
Total revenues (Note K)	35	38
Gathering, processing and exchange services revenue | Operating segments | Natural Gas Liquids
Segment Reporting Information [Line Items]
Total revenues (Note K)	122	131
Gathering, processing and exchange services revenue | Operating segments | Natural Gas Pipelines
Segment Reporting Information [Line Items]
Total revenues (Note K)	0	0
Gathering, processing and exchange services revenue | Operating segments | - NGLs, Refined Products, and crude oil (MMBbl)
Segment Reporting Information [Line Items]
Total revenues (Note K)	0
Gathering, processing and exchange services revenue | Other and eliminations
Segment Reporting Information [Line Items]
Total revenues (Note K)	0	0
Transportation and storage revenue
Segment Reporting Information [Line Items]
Total revenues (Note K)	664	193
Transportation and storage revenue | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	671	195
Transportation and storage revenue | Operating segments | Natural Gas Gathering and Processing
Segment Reporting Information [Line Items]
Total revenues (Note K)	0	0
Transportation and storage revenue | Operating segments | Natural Gas Liquids
Segment Reporting Information [Line Items]
Total revenues (Note K)	48	50
Transportation and storage revenue | Operating segments | Natural Gas Pipelines
Segment Reporting Information [Line Items]
Total revenues (Note K)	157	145
Transportation and storage revenue | Operating segments | - NGLs, Refined Products, and crude oil (MMBbl)
Segment Reporting Information [Line Items]
Total revenues (Note K)	466
Transportation and storage revenue | Other and eliminations
Segment Reporting Information [Line Items]
Total revenues (Note K)	(7)	(2)
Other
Segment Reporting Information [Line Items]
Total revenues (Note K)	32	5
Other | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	37	12
Other | Operating segments | Natural Gas Gathering and Processing
Segment Reporting Information [Line Items]
Total revenues (Note K)	8	8
Other | Operating segments | Natural Gas Liquids
Segment Reporting Information [Line Items]
Total revenues (Note K)	2	3
Other | Operating segments | Natural Gas Pipelines
Segment Reporting Information [Line Items]
Total revenues (Note K)	0	1
Other | Operating segments | - NGLs, Refined Products, and crude oil (MMBbl)
Segment Reporting Information [Line Items]
Total revenues (Note K)	27
Other | Other and eliminations
Segment Reporting Information [Line Items]
Total revenues (Note K)	(5)	$ (7)
Liquids commodity sales
Segment Reporting Information [Line Items]
Total revenues (Note K)	3,556
Liquids commodity sales | Operating segments
Segment Reporting Information [Line Items]
Total revenues (Note K)	4,238
Liquids commodity sales | Operating segments | Natural Gas Gathering and Processing
Segment Reporting Information [Line Items]
Total revenues (Note K)	623
Liquids commodity sales | Operating segments | Natural Gas Liquids
Segment Reporting Information [Line Items]
Total revenues (Note K)	3,264
Liquids commodity sales | Operating segments | Natural Gas Pipelines
Segment Reporting Information [Line Items]
Total revenues (Note K)	0
Liquids commodity sales | Operating segments | - NGLs, Refined Products, and crude oil (MMBbl)
Segment Reporting Information [Line Items]
Total revenues (Note K)	351
Liquids commodity sales | Other and eliminations
Segment Reporting Information [Line Items]
Total revenues (Note K)	$ (682)

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SEGMENTS - Reconciliation of Net Income to Total Segment Adjusted EBITDA (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Net income	$ 639	$ 1,049
Interest expense, net of capitalized interest	300	166
Depreciation and amortization	254	162
Income taxes	208	330
Adjusted EBITDA from unconsolidated affiliates	101	56
Income (Loss) from Equity Method Investments	(76)	(40)
Noncash compensation expense and other	15	10
Other Corporate Costs and Noncash Items	(1)	(7)
Segment adjusted EBITDA	1,440	1,726
Medford settlement gain	$ 0	779
Additional Adjusted EBITDA		16
Medford Incident
Segment Reporting Information [Line Items]
Segment adjusted EBITDA		733
Business Interruption - Settlement Proceeds Less Third Party Frac Costs | Medford Incident
Segment Reporting Information [Line Items]
Third party fractionation costs		46
Business Interruption - Settlement Proceeds | Medford Incident
Segment Reporting Information [Line Items]
Medford settlement gain		$ 779	$ 779