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UNCONSOLIDATED AFFILIATES (Tables) | 12 Months Ended
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Dec. 31, 2023
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 |  | December 31, 2023 |  | December 31, 2022 |  |
|  |  |  | (Millions of dollars)
Overland Pass |  | 50% |  | $ | 402 |  |  | $ | 401 |  |  |
Northern Border |  | 50% |  | 338 |  |  | 265 |  |  |
Saddlehorn |  | 30% |  | 288 |  |  | — |  |  |
MVP |  | 25% |  | 241 |  |  | — |  |  |
Roadrunner |  | 50% |  | 188 |  |  | 94 |  |  |
BridgeTex |  | 30% |  | 193 |  |  | — |  |  |
Other |  | Various |  | 224 |  |  | 42 |  |  |
Investments in unconsolidated affiliates (a) |  | $ | 1,874 |  |  | $ | 802 |  |  |
(a) - Includes basis differences of $148 million and $17 million at December 31, 2023 and 2022, respectively, related primarily to equity-method goodwill (Note A). The following table sets forth our equity in net earnings from investments for the periods indicated:
|  | Years Ended December 31,
|  | 2023 |  | 2022 |  | 2021 |  |
|  | (Millions of dollars)
Northern Border |  | $ | 75 |  |  | $ | 71 |  |  | $ | 64 |  |  |
Overland Pass |  | 56 |  |  | 33 |  |  | 19 |  |  |
Roadrunner |  | 43 |  |  | 37 |  |  | 33 |  |  |
Saddlehorn (a) |  | 10 |  |  | — |  |  | — |  |  |
MVP (a) |  | 4 |  |  | — |  |  | — |  |  |
BridgeTex (a) |  | (1) |  |  | — |  |  | — |  |  |
Other (a) |  | 15 |  |  | 7 |  |  | 6 |  |  |
Equity in net earnings from investments |  | $ | 202 |  |  | $ | 148 |  |  | $ | 122 |  |  |
(a) - Includes equity in net earnings from the period September 25, 2023 through December 31, 2023.

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- Definition Tabular disclosure of equity method investments including, but not limited to, name of each investee or group of investments, percentage ownership, difference between recorded amount of an investment and the value of the underlying equity in the net assets, and summarized financial information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481687/323-10-50-3 + Details
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