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Fair Value Measurements (Tables) | 9 Months Ended
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Sep. 30, 2017
Fair Value Disclosures [Abstract] |
Schedule of Financial Assets and Liabilities Measured at Fair Value | The following table summarizes information regarding Nucor’s financial assets and financial liabilities that are measured at fair value as of September 30, 2017 and December 31, 2016 (in thousands). 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 September 30, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents |  | $ | 1,143,259 |  |  | $ | 1,143,259 |  |  | $ | — |  |  | $ | — |
Short-term investments |  |  | 50,000 |  |  |  | 50,000 |  |  |  | — |  |  |  | — |
Commodity contracts |  |  | 400 |  |  |  | — |  |  |  | 400 |  |  |  | — |
Total assets |  | $ | 1,193,659 |  |  | $ | 1,193,259 |  |  | $ | 400 |  |  | $ | — |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commodity and foreign exchange contracts |  | $ | (2,318 | ) |  | $ | — |  |  | $ | (2,318 | ) |  | $ | — |
As of December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents |  | $ | 1,609,523 |  |  | $ | 1,609,523 |  |  | $ | — |  |  | $ | — |
Short-term investments |  |  | 150,000 |  |  |  | 150,000 |  |  |  | — |  |  |  | — |
Commodity and foreign exchange contracts |  |  | 2,029 |  |  |  | — |  |  |  | 2,029 |  |  |  | — |
Total assets |  | $ | 1,761,552 |  |  | $ | 1,759,523 |  |  | $ | 2,029 |  |  | $ | — |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commodity contracts |  | $ | (605 | ) |  | $ | — |  |  | $ | (605 | ) |  | $ | — |

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258 + Details
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