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%