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Fair Value Measurements | 9 Months Ended
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Oct. 04, 2025
Fair Value Disclosures [Abstract] |
Fair Value Measurements | 6. Fair Value Measurements The following table summarizes information regarding Nucor’s financial assets and financial liabilities that were measured at fair value as of October 4, 2025 and December 31, 2024 (in millions). Nucor does not have any non-financial assets or non-financial liabilities that are measured at fair value on a recurring basis.
|  |  |  |  | Fair Value Measurements at Reporting Date Using |
Description |  | Carrying Amount in Condensed Consolidated Balance Sheets |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
As of October 4, 2025 |  |  |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents |  | $ | 1,560 |  |  | $ | 1,560 |  |  | $ | - |  |  | $ | - |
Short-term investments |  |  | 524 |  |  |  | 524 |  |  |  | - |  |  |  | - |
Derivative contracts |  |  | 2 |  |  |  | - |  |  |  | 2 |  |  |  | - |
Other assets |  |  | 134 |  |  |  | 60 |  |  |  | - |  |  |  | 74 |
Total assets |  | $ | 2,220 |  |  | $ | 2,144 |  |  | $ | 2 |  |  | $ | 74 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |
Derivative contracts |  | $ | (5 | ) |  | $ | - |  |  | $ | (5 | ) |  | $ | - |
As of December 31, 2024 |  |  |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents |  | $ | 2,821 |  |  | $ | 2,821 |  |  | $ | - |  |  | $ | - |
Short-term investments |  |  | 581 |  |  |  | 581 |  |  |  | - |  |  |  | - |
Derivative contracts |  |  | 7 |  |  |  | - |  |  |  | 7 |  |  |  | - |
Other assets |  |  | 96 |  |  |  | 27 |  |  |  | - |  |  |  | 69 |
Total assets |  | $ | 3,505 |  |  | $ | 3,429 |  |  | $ | 7 |  |  | $ | 69 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |
Derivative contracts |  | $ | (4 | ) |  | $ | - |  |  | $ | (4 | ) |  | $ | - |
Fair value measurements for Nucor’s cash equivalents, short-term investments and an investment in a publicly traded nuclear power equipment manufacturer are classified under Level 1 because such measurements are based on quoted market prices in active markets for identical assets. Fair value measurements for Nucor’s derivatives, which are typically commodity or foreign exchange contracts, are classified under Level 2 because such measurements are based on published market prices for similar assets or are estimated based on observable inputs such as interest rates, yield curves, credit risks, spot and future commodity prices, and spot and future exchange rates. Fair value measurements for Nucor's investments in privately held companies, most of which are in a nuclear fusion technology company, are classified under Level 3 because such measurements are estimated based on unobservable inputs that indicate a change in fair value, including the transaction price in the event of a change in ownership of the investee (e.g., the sale of other investors' interests in the company) or the transaction price in the event of additional equity issuances of the investee. There were no transfers between levels in the fair value hierarchy for the periods presented. The fair value of short-term and long-term debt, including current maturities, was approximately $6.34 billion at October 4, 2025 (approximately $6.19 billion at December 31, 2024). The debt fair value estimates are classified under Level 2 because such estimates are based on readily available market prices of our debt at October 4, 2025 and December 31, 2024, or similar debt with the same maturities, ratings and interest rates.

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- Definition The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 107 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-107 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2E -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 940 -SubTopic 820 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478119/940-820-50-1 + Details
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