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Stockholders' Equity - Additional Information (Detail) - USD ($) | Sep. 30, 2017 | Oct. 01, 2016 | Sep. 02, 2015
--- | --- | --- | ---
Common Stock [Member] |  |  |
Stockholders' Equity [Line Items] |  |  |
Stock repurchase program remaining amount | $ 738,000,000 |  |
Common Stock [Member] | Maximum [Member] |  |  |
Stockholders' Equity [Line Items] |  |  |
Stock repurchase program authorized amount |  |  | $ 900,000,000
Nucor-Yamato Steel Company [Member] |  |  |
Stockholders' Equity [Line Items] |  |  |
Noncontrolling interest, ownership percentage by parent | 51.00% | 51.00% |

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- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
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- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
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- Details
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