Inventories	6 Months Ended
Jul. 03, 2021
Inventory Disclosure [Abstract]
Inventories	2. Inventories Inventories consisted of approximately 48% raw materials and supplies and 52% finished and semi-finished products at July 3, 2021 (42% and 58%, respectively, at December 31, 2020). Nucor’s manufacturing process consists of a continuous, vertically integrated process from which products are sold to customers at various stages throughout the process. Since most steel products can be classified as either finished or semi-finished products, these two categories of inventory are combined.

The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 330
-URI http://asc.fasb.org/topic&trid=2126998

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