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

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- Definition

Total amount outstanding under equity method investments applicable credit facilities.

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No definition available.

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- Definition

The equity method investments available credit facilities subject to guarantee.

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No definition available.

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- Definition

Guarantor obligation percentage of exposure in case of default.

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No definition available.

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- Definition

Interest rate per year in excess of Euribor as of date of the note.

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No definition available.

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- Definition

The number of sheet processing facilities operated by equity method investment.

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No definition available.

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- Definition

Period used for lag basis.

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No definition available.

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- Definition

Step-up to fair value of equity method investment, portion related to identification of goodwill.

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No definition available.

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- Definition

The aggregate amount of recurring noncash expense charged against earnings in the period to allocate the cost of assets over their estimated remaining economic lives.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
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-Paragraph 2
-Subparagraph (a)(2)
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- Definition

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).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.11)
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- Definition

Difference between amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and amount of underlying equity in net assets the reporting Entity has in the investee.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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- Definition

This item represents the entity's ownership percentage in the investee multiplied by the investee's total equity.

+ References

+ Details

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- Definition

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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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
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- Definition

Date of maturity or expiration of arrangements with a related party (for example, but not limited to, leasing and debt arrangements between related parties), in CCYY-MM-DD format.

+ References

No definition available.

+ Details

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Balance Type:	na
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- Definition

Identify the stated interest rate per the agreement, for example, leasing and debt arrangements between related parties.

+ References

No definition available.

+ Details

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- Definition

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.

+ References

No definition available.

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Equity Investments - Additional Information (Detail) $ in Thousands, € in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($)	Oct. 01, 2016 USD ($)	Sep. 30, 2017 USD ($) Sheet	Oct. 01, 2016 USD ($)	Sep. 30, 2017 EUR (€)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 EUR (€)
Schedule of Equity Method Investments [Line Items]
Equity method investment	$ 695,200		$ 695,200			$ 663,400
Distributions from affiliates			48,037	$ 38,474
Amortization expense due to fair value step-up			68,394	54,066
NuMit LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment	$ 311,900		$ 311,900			325,100
Equity method investment, ownership percentage	50.00%		50.00%		50.00%
Period used for lag basis, in months			1 month
Distributions from affiliates	$ 100	$ 500	$ 47,000	37,500
Steel Technologies LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	100.00%		100.00%		100.00%
Number of sheet processing facilities operated by Steel Technologies \| Sheet			25
Duferdofin Nucor S.r.l. [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment	$ 280,800		$ 280,800			256,600
Equity method investment, ownership percentage	50.00%		50.00%		50.00%
Period used for lag basis, in months			1 month
Equity method investments, share of net assets	$ 112,600		$ 112,600
Basis difference due to the step-up to fair value of certain assets and liabilities	168,200		168,200
Step-up to fair value of equity method investment, portion related to identification of goodwill	91,000
Amortization expense due to fair value step-up	2,300	$ 2,200	6,600	$ 6,600
Due from related parties, noncurrent	41,300		$ 41,300		€ 35.0	36,900	€ 35.0
Notes receivable, related parties, interest rate			0.83%
Interest rate per year in excess of Euribor as of date of the notes			1.00%
Equity method investments notes payable with parent company, maturity date			Jan. 31, 2019
Facility A [Member] \| Duferdofin Nucor S.r.l. [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investments credit facilities, amount	144,600		$ 144,600		122.5
Total amount outstanding under equity method investments credit facilities	$ 144,600		$ 144,600		€ 122.5	$ 112,700	€ 107.0
Guarantor obligation percentage of exposure in case of default	50.00%		50.00%		50.00%
Line of credit facility, maturity period			Oct. 12, 2018