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Debt (Tables) | 12 Months Ended
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Dec. 31, 2021
Debt Disclosure [Abstract] |
Schedule of debt | Our total debt, including short-term borrowings and current maturities of long-term debt, consisted of the following:
| December 31
Millions of dollars | 2021 | 2020
5.0% senior notes due November 2045 | $ | 2,000 |  | $ | 2,000 |
3.8% senior notes due November 2025 | 1,000 |  | 1,000 |
4.85% senior notes due November 2035 | 1,000 |  | 1,000 |
7.45% senior notes due September 2039 | 1,000 |  | 1,000 |
2.92% senior notes due March 2030 | 1,000 |  | 1,000 |
4.75% senior notes due August 2043 | 900 |  | 900 |
6.7% senior notes due September 2038 | 800 |  | 800 |
3.5% senior notes due August 2023 | 600 |  | 600 |
4.5% senior notes due November 2041 | 500 |  | 500 |
3.25% senior notes due November 2021 | — |  | 500 |
7.6% senior debentures due August 2096 | 300 |  | 300 |
8.75% senior debentures due February 2021 | — |  | 185 |
6.75% notes due February 2027 | 104 |  | 104 |
Other | 11 |  | 20 |
Unamortized debt issuance costs and discounts | (77) |  | (82) |
Total | 9,138 |  | 9,827 |
Short-term borrowings and current maturities of long-term debt | (11) |  | (695) |
Total long-term debt | $ | 9,127 |  | $ | 9,132 |

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