Basis of Interim Presentation - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Amount of increase in consolidated net sales if previous accounting guidance had continued to be used	$ 22.7	$ 32.9
Amount of increase in revenue had previous accounting method been used as a percentage of sales	0.40%	0.30%
Amount of increase in consolidated cost of products sold if previous accounting guidance had continued to be used	$ 22.7	$ 32.9

The amount of increase in cost of products sold had the previous guidance in effect before the adoption of the new revenue accounting guidance been used.

No definition available.

Name:	nue_IncreaseInCostOfProductsSoldHadPreviousAccountingMethodContinuedUsed
Namespace Prefix:	nue_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration