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Inventories
3 Months Ended
Apr. 02, 2016
Inventory Disclosure [Abstract]  
Inventories
3. INVENTORIES: Inventories consisted of approximately 35% raw materials and supplies and 65% finished and semi-finished products at April 2, 2016 (38% and 62%, respectively, at December 31, 2015). 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.

Inventories valued using the last-in, first-out (LIFO) method of accounting represented approximately 43% of total inventories as of April 2, 2016 (48% as of December 31, 2015). If the first-in, first-out (FIFO) method of accounting had been used, inventories would have been $128.1 million higher at April 2, 2016 ($100.6 million higher at December 31, 2015). Use of the lower of cost or market methodology reduced inventories by $3.1 million at April 2, 2016 ($5.1 million at December 31, 2015).