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Stock-Based Compensation (Tables) | 6 Months Ended
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Jul. 04, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Summary of Stock Option Plans Activity | A summary of activity under Nucor’s stock option plans for the first six months of 2015 is as follows (in thousands, except year and per share amounts):
|  | Shares |  |  | Weighted - Average Exercise Price |  |  | Weighted - Average Remaining Contractual Life |  |  | Aggregate Intrinsic Value |
Number of shares under option: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding at beginning of year |  |  | 2,422 |  |  | $ | 42.39 |  |  |  |  |  |  |  |  |
Granted |  |  | 700 |  |  | $ | 47.59 |  |  |  |  |  |  |  |  |
Exercised |  |  | (10 | ) |  | $ | 42.34 |  |  |  |  |  |  | $ | 66 |
Canceled |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Outstanding at July 4, 2015 |  |  | 3,112 |  |  | $ | 43.56 |  |  |  | 7.7 years |  |  | $ | 7,526 |
Options exercisable at July 4, 2015 |  |  | 1,551 |  |  | $ | 39.49 |  |  |  | 6.2 years |  |  | $ | 7,526 |
Schedule of Grant Date Fair Value Black-Scholes Option-Pricing Model Assumptions | For the 2015 stock option grant, the grant date fair value of $11.71 per share was calculated using the Black-Scholes option-pricing model with the following assumptions:
Exercise price |  | $ | 47.59 |
Expected dividend yield |  |  | 3.13 | %
Expected stock price volatility |  |  | 33.32 | %
Risk-free interest rate |  |  | 1.86 | %
Expected life (years) |  |  | 6.5 |
Summary of Nucor's Restricted Stock Unit Activity | A summary of Nucor’s RSU activity for the first six months of 2015 is as follows (shares in thousands):
|  | Shares |  |  | Grant Date Fair Value |
Restricted stock units: |  |  |  |  |  |  |  |
Unvested at beginning of year |  |  | 1,012 |  |  | $ | 45.98 |
Granted |  |  | 790 |  |  | $ | 47.59 |
Vested |  |  | (731 | ) |  | $ | 44.92 |
Canceled |  |  | (9 | ) |  | $ | 46.01 |
Unvested at July 4, 2015 |  |  | 1,062 |  |  | $ | 47.91 |
Shares reserved for future grants (stock options and RSUs) |  |  | 10,343 |  |  |  |  |
Summary of Nucor's Restricted Stock Activity under AIP and LTIP | A summary of Nucor’s restricted stock activity under the AIP and the LTIP for the first six months of 2015 is as follows (shares in thousands):
|  | Shares |  |  | Grant Date Fair Value |
Restricted stock awards and units: |  |  |  |  |  |  |  |
Unvested at beginning of year |  |  | 65 |  |  | $ | 48.20 |
Granted |  |  | 136 |  |  | $ | 47.07 |
Vested |  |  | (134 | ) |  | $ | 47.11 |
Canceled |  |  | — |  |  |  | — |
Unvested at July 4, 2015 |  |  | 67 |  |  | $ | 48.08 |
Shares reserved for future grants |  |  | 975 |  |  |  |  |

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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