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UNCONSOLIDATED AFFILIATES (Tables)
 12 Months Ended
Dec. 31, 2024
Equity Method Investments and Joint Ventures [Abstract]  
Schedule of Equity Method Investments The following table sets forth our investments in unconsolidated affiliates as of the dates indicated:
Net
Ownership
Interest		Dec. 31,
2024		Dec. 31,
2023
  
(Millions of dollars)
Overland Pass50%$400 $402 
Saddlehorn (a)40%373 288 
Northern Border50%333 338 
BridgeTex30%250 193 
Matterhorn (b)15%248 — 
MVP 25%235 241 
Roadrunner50%183 188 
OtherVarious294 224 
Investments in unconsolidated affiliates (c)$2,316 $1,874 
(a) - In March 2024, we purchased an additional 10% interest in Saddlehorn, resulting in a 40% ownership interest.
(b) - As of Dec. 31, 2024, the 15% interest represents EnLink’s ownership interest in Matterhorn.
(c) - Includes basis differences of $368 million and $148 million at Dec. 31, 2024 and 2023, respectively, related to property, plant and equipment and equity-method goodwill (Note A).
The following table sets forth our equity in net earnings from investments for the periods indicated:
 Years Ended Dec. 31,
 202420232022
 
(Millions of dollars)
BridgeTex (a)$127 $(1)$— 
Northern Border95 75 71 
Overland Pass86 56 33 
Saddlehorn (a)50 10 — 
Roadrunner40 43 37 
MVP (a)14 4 — 
Matterhorn (b)8 — — 
Other
19 15 7 
Equity in net earnings from investments$439 $202 $148 
(a) - For the year ended Dec. 31, 2023, includes equity in net earnings from the period Sept. 25, 2023 through Dec. 31, 2023.
(b) - For the year ended Dec. 31, 2024, includes equity in net earnings from the period Oct. 15, 2024 through Dec. 31, 2024.