The subsidiary's percentage of ownership of common stock or equity participation in a company.

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Total amount outstanding under equity method investments applicable credit facilities.

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The equity method investments available credit facilities subject to guarantee.

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Equity method investments principal amount subject to guarantee for other credit facilities.

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Guarantor obligation percentage of exposure in case of default.

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Charges related to impairments, losses or cumulative foreign currency translation losses reclassified into earnings related to certain assets.

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Number of sheet processing facilities operated by equity investment.

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Percentage of interest held by other party in other entity.

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Period used for lag basis.

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Aggregate amount of receivables to be collected from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth, at the financial statement date. which are usually due after one year (or one business cycle).

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This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Amount of tax expense (benefit), after reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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The cash inflow from an entity that is affiliated with the entity by means of direct or indirect ownership.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Equity Investments - Additional Information (Detail) $ in Thousands, € in Millions	3 Months Ended				12 Months Ended
	Dec. 31, 2020 USD ($)	Oct. 03, 2020 USD ($)	Jul. 04, 2020 USD ($)	Apr. 04, 2020 USD ($)	Dec. 31, 2021 USD ($) Sheet	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Nov. 30, 2021 USD ($)	Dec. 31, 2020 EUR (€)	Jan. 16, 2019
Schedule Of Equity Method Investments [Line Items]
Equity method investments	$ 520,000				$ 624,600	$ 520,000
Equity method investments impairment charges					$ 62,161	613,640	$ 66,916
Nucor-JFE [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method investment, ownership percentage					50.00%					50.00%
Equity method investments	147,100				$ 147,000	147,100
Period used for lag basis, in months					1 month
Principal amount subject to guarantee for other credit facilities	25,000				$ 50,000	25,000
Nucor-JFE [Member] \| General Financing Agreement and Promissory Note [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method investments credit facilities subject to guarantee, amount								$ 100,000
Total amount outstanding under equity method investments credit facilities	50,000				$ 90,000	50,000
Guarantor obligation percentage of exposure in case of default					50.00%
NuMit LLC [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method investment, ownership percentage					50.00%
Equity method investments	$ 323,600				$ 418,700	323,600
Period used for lag basis, in months					1 month
Distributions from affiliates					$ 200	$ 9,500	$ 36,500
Steel Technologies LLC [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method investment, ownership percentage					100.00%
Number of sheet processing facilities operated by Steel Technologies \| Sheet					30
Duferdofin Nucor S.r.l. [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	50.00%				50.00%	50.00%			50.00%
Equity method investments	$ 0					$ 0
Period used for lag basis, in months					1 month
Percentage of interest held by other party in other entity					50.00%
Due from related parties, noncurrent	37,800					37,800			€ 35.0
Equity method investments impairment charges	25,400	$ 6,600	$ 5,000	$ 250,000
Cumulative foreign currency translation losses reclassified into earnings	158,600
Equity method investments impairment charges	$ 184,000			$ 287,800		$ 483,500