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DEBT (Tables) | 12 Months Ended
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Dec. 31, 2022
Long-Term Debt, Unclassified [Abstract] |
Debt | The following table sets forth our consolidated debt for as of the dates indicated:
|  | December 31, 2022 |  | December 31, 2021
|  | (Thousands of dollars)
Commercial paper outstanding (a) |  | $ | — |  |  | $ | — |
Senior unsecured obligations: |  |  |  |
$900,000 at 3.375% due October 2022 |  | — |  |  | 895,814 |
$425,000 at 5.0% due September 2023 |  | 425,000 |  |  | 425,000 |
$500,000 at 7.5% due September 2023 |  | 500,000 |  |  | 500,000 |
$500,000 at 2.75% due September 2024 |  | 500,000 |  |  | 500,000 |
$500,000 at 4.9% due March 2025 |  | 500,000 |  |  | 500,000 |
$400,000 at 2.2% due September 2025 |  | 387,000 |  |  | 387,000 |
$600,000 at 5.85% due January 2026 |  | 600,000 |  |  | 600,000 |
$500,000 at 4.0% due July 2027 |  | 500,000 |  |  | 500,000 |
$800,000 at 4.55% due July 2028 |  | 800,000 |  |  | 800,000 |
$100,000 at 6.875% due September 2028 |  | 100,000 |  |  | 100,000 |
$700,000 at 4.35% due March 2029 |  | 700,000 |  |  | 700,000 |
$750,000 at 3.4% due September 2029 |  | 714,251 |  |  | 714,251 |
$850,000 at 3.1% due March 2030 |  | 780,093 |  |  | 780,093 |
$600,000 at 6.35% due January 2031 |  | 600,000 |  |  | 600,000 |
$750,000 at 6.1% due November 2032 |  | 750,000 |  |  | — |
$400,000 at 6.0% due June 2035 |  | 400,000 |  |  | 400,000 |
$600,000 at 6.65% due October 2036 |  | 600,000 |  |  | 600,000 |
$600,000 at 6.85% due October 2037 |  | 600,000 |  |  | 600,000 |
$650,000 at 6.125% due February 2041 |  | 650,000 |  |  | 650,000 |
$400,000 at 6.2% due September 2043 |  | 400,000 |  |  | 400,000 |
$700,000 at 4.95% due July 2047 |  | 689,006 |  |  | 689,006 |
$1,000,000 at 5.2% due July 2048 |  | 1,000,000 |  |  | 1,000,000 |
$750,000 at 4.45% due September 2049 |  | 672,530 |  |  | 672,530 |
$500,000 at 4.5% due March 2050 |  | 443,015 |  |  | 443,015 |
$300,000 at 7.15% due January 2051 |  | 300,000 |  |  | 300,000 |
Guardian |  |  |  |
$120,000 term loan, rate of 4.06% as of December 31, 2022, due June 2025 |  | 120,000 |  |  | — |
Total debt |  | 13,730,895 |  |  | 13,756,709 |
Unamortized portion of terminated swaps |  | 9,878 |  |  | 11,596 |
Unamortized debt issuance costs and discounts |  | (119,939) |  |  | (124,855) |
Current maturities of long-term debt |  | (925,000) |  |  | (895,814) |
Long-term debt |  | $ | 12,695,834 |  |  | $ | 12,747,636 |
(a) - Individual issuances of commercial paper under our commercial paper program generally mature in 90 days or less.
Aggregate maturities of long-term debt outstanding | The aggregate maturities of long-term debt outstanding and interest payments on debt as of December 31, 2022, for the years 2023 through 2027 are shown below:
|  | Senior Unsecured Obligations |  |  |  |  |  | Guardian |  | Interest Obligations on Debt |  | Total
|  | (Millions of dollars)
2023 |  | $ | 925.0 |  |  |  |  |  |  | $ | — |  |  | $ | 675.1 |  |  | $ | 1,600.1 |
2024 |  | $ | 500.0 |  |  |  |  |  |  | $ | — |  |  | $ | 630.4 |  |  | $ | 1,130.4 |
2025 |  | $ | 887.0 |  |  |  |  |  |  | $ | 120.0 |  |  | $ | 599.3 |  |  | $ | 1,606.3 |
2026 |  | $ | 600.0 |  |  |  |  |  |  | $ | — |  |  | $ | 554.5 |  |  | $ | 1,154.5 |
2027 |  | $ | 500.0 |  |  |  |  |  |  | $ | — |  |  | $ | 544.7 |  |  | $ | 1,044.7 |

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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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- Definition Tabular disclosure of maturity and sinking fund requirement for long-term debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=123465755&loc=d3e1835-112601 + Details
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