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Subsequent Events - Additional Information (Detail) | 9 Months Ended
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Sep. 30, 2017 $ / shares
Subsequent Events [Abstract] |
Diluted share expense related to subsequent event | $ 0.05

X
- Definition The amount of expense per diluted share recognized in the period because of a subsequent event arising after the balance sheet date but before the financial statements were issued related to matters that existed as of the balance sheet date. + References No definition available. + Details
Name: | nue_DilutedShareExpenseRelatedToSubsequentEvent
Namespace Prefix: | nue_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_SubsequentEventsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration