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Accumulated Other Comprehensive Income (Loss) - Additional Information (Detail) $ in Millions | 3 Months Ended
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Dec. 31, 2020 USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items] |
Cumulative foreign currency translation losses reclassified into earnings | $ 158.6
Duferdofin Nucor S.r.l. [Member] |
Accumulated Other Comprehensive Income (Loss) [Line Items] |
Equity method investment, ownership percentage | 50.00%

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- Definition The amount of net gains or losses on foreign currency cash flow hedges reclassified during the period to earnings from accumulated other comprehensive income upon the hedged transaction affecting earnings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 + Details
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