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DEBT
 9 Months Ended
Sep. 30, 2025
Debt Disclosure [Abstract]  
DEBT DEBT
Current Maturities - At September 30, 2025, our current maturities of long-term debt consist of the following:
(Millions of dollars)
$600 at 5.85% due January 2026
$600 
$650 at 5.0% due March 2026
650 
$500 at 4.85% due July 2026
491 
Current maturities of long-term debt $1,741 

Commercial Paper Program - At September 30, 2025, and December 31, 2024, we had no commercial paper outstanding.

In September 2025, we increased the size of our commercial paper program to $3.5 billion from $2.5 billion.

$3.5 Billion Credit Agreement - In February 2025, we amended and restated our $2.5 Billion Credit Agreement to increase the size to $3.5 billion, extend the term to February 2030 and make other nonmaterial modifications. Our $3.5 Billion Credit Agreement 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 $3.5 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 $3.5 Billion Credit Agreement allows inclusion of the trailing 12 months of consolidated adjusted EBITDA of an acquired business. In July 2025, we completed the BridgeTex Additional Interest Acquisition, which allowed us to effectively extend the acquisition adjustment period under our $3.5 Billion Credit Agreement and, as a result, our leverage ratio covenant of 5.5 to 1 was extended through the quarter ending March 31, 2026, after which it will decrease to 5.0 to 1. As of September 30, 2025, we had no outstanding borrowings, our ratio of consolidated indebtedness to adjusted EBITDA was 4.2 to 1, and we were in compliance with all covenants under our $3.5 Billion Credit Agreement.
Debt Issuances - In August 2025, we completed an underwritten public offering of $3.0 billion senior unsecured notes consisting of $750 million, 4.95% senior notes due 2032; $1.0 billion, 5.4% senior notes due 2035; and $1.25 billion, 6.25% senior notes due 2055. The net proceeds, after deducting underwriting discounts, commissions and offering expenses, were $2.96 billion. The net proceeds from this offering were partially used to repay our commercial paper outstanding and repay in full at maturity our senior notes due September 2025. We expect to use the remaining net proceeds from the offering for general corporate purposes, including the repurchase or redemption of existing notes.

Debt Repayments - In the third quarter of 2025, we repurchased in the open market certain of our senior notes in the principal amount of $119 million for an aggregate repurchase price of $96 million, including accrued and unpaid interest, with cash on hand.

In September 2025, we repaid the remaining $387 million of our $400 million, 2.2% senior notes at maturity with cash on hand from our August 2025 public offering.

In June 2025, we repaid the remaining $422 million of our $750 million, 4.15% senior notes at maturity with short-term borrowings.

In the second quarter of 2025, we repurchased in the open market certain of our senior notes in the principal amount of $169 million for an aggregate repurchase price of $133 million, including accrued and unpaid interest, with short-term borrowings.

In March 2025, we repaid our $250 million, 3.2% senior notes at maturity with cash on hand.

EnLink Acquisition - Upon the closing of the EnLink Acquisition on January 31, 2025, we terminated the EnLink Revolving Credit Facility. We also terminated the agreement to provide revolving unsecured loans to EnLink through a promissory note. For further details on the EnLink Revolving Credit Facility and the promissory note, see Note H of the Notes to Consolidated Financial Statements in our Annual Report.

Debt Guarantees - At the completion of the EnLink Acquisition on January 31, 2025, ONEOK assumed the outstanding debt of EnLink and EnLink Partners (the “Assumed Debt”). EnLink and EnLink Partners were released from all debt obligations, and each entity provided a guarantee for our and ONEOK Partners’ indebtedness to the holders of each series of outstanding securities, including for the Assumed Debt.

ONEOK, ONEOK Partners, the Intermediate Partnership, Magellan, EnLink and EnLink Partners have cross guarantees in place for ONEOK’s and ONEOK Partners’ indebtedness. For further details on our indebtedness, see Note H of the Notes to Consolidated Financial Statements in our Annual Report.