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Fair value by balance sheet grouping table (Tables) | 6 Months Ended
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Jun. 30, 2025
Fair Value Disclosures [Abstract] |
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments | The carrying amount and fair value of our total debt is as follows:
| June 30, 2025 |  | December 31, 2024
Millions of dollars | Level 1 | Level 2 | Total fair value | Carrying value |  | Level 1 | Level 2 | Total fair value | Carrying value
Total debt | $7,044 | $357 | $7,401 | $7,544 |  | $4,503 | $2,825 | $7,328 | $7,541

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- Definition Tabular disclosure of information pertaining to carrying amount and estimated fair value of short-term and long-term debt instruments or arrangements, including but not limited to, identification of terms, features, and collateral requirements. + References No definition available. + Details
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