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

No definition available.

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- Definition

Total amount outstanding under equity method investments applicable credit facilities.

+ References

No definition available.

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- Definition

The equity method investments available credit facilities subject to guarantee.

+ References

No definition available.

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- Definition

Guarantor obligation percentage of exposure in case of default.

+ References

No definition available.

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- Definition

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

+ References

No definition available.

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- Definition

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

+ References

No definition available.

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- Definition

Period used for lag basis

+ References

No definition available.

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- Definition

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

+ References

No definition available.

+ Details

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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)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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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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-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(k)(1))

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (d)

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph k

-Subparagraph 1

-Article 4

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 11

-Article 5

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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)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

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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

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

+ Details

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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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Balance Type:	credit
Period Type:	instant

- 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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35755396&loc=d3e33749-111570

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.12)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

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

+ References

+ Details

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Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- 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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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration

- 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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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- 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.

+ Details

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Equity Investments - Additional Information (Detail) $ in Thousands, € in Millions		3 Months Ended		6 Months Ended
	Jul. 04, 2015 USD ($)	Jul. 04, 2015 USD ($)	Jul. 05, 2014 USD ($)	Jul. 04, 2015 USD ($) Sheet	Jul. 05, 2014 USD ($)	Jul. 04, 2015 EUR (€)	Dec. 31, 2014 USD ($)	Dec. 31, 2014 EUR (€)
Schedule of Equity Method Investments [Line Items]
Equity method investment	$ 849,000	$ 849,000		$ 849,000			$ 872,500
Amortization expense due to fair value step-up				36,895	$ 36,265
Hunter Ridge Energy Services LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment	$ 136,900	$ 136,900		$ 136,900			138,600
Period used for lag basis, in months	1 month
Equity method investment, ownership percentage	50.00%	50.00%		50.00%		50.00%
Duferdofin Nucor S.r.l. [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment	$ 371,400	$ 371,400		$ 371,400			412,900
Period used for lag basis, in months				1 month
Equity method investment, ownership percentage	50.00%	50.00%		50.00%		50.00%
Equity method investments, share of net assets	$ 49,600	$ 49,600		$ 49,600
Basis difference due to the step-up to fair value of certain assets and liabilities	321,800	321,800		321,800
Step-up to fair value of equity method investment, portion related to identification of goodwill				268,000
Amortization expense due to fair value step-up		2,200	$ 2,700	4,400	$ 5,400
Due from related parties, noncurrent	38,800	38,800		$ 38,800		€ 35.0	42,500	€ 35.0
Notes receivable, related parties, interest rate				1.34%
Interest rate per year in excess of Euribor as of date of the notes				1.00%
Equity method investments note payable with parent company, maturity date				Jan. 31, 2019
Line of credit facility, maturity period				Apr. 26, 2016
Duferdofin Nucor S.r.l. [Member] \| Standby Medium Long Term Credit Facility [Member]
Schedule of Equity Method Investments [Line Items]
Total amount outstanding under equity method investments credit facilities	$ 66,600	$ 66,600		$ 66,600		€ 60.0	72,800	60.0
Line of credit facility, maturity period				Apr. 22, 2016
Guarantor obligation percentage of exposure in case of default	50.00%	50.00%		50.00%		50.00%
Duferdofin Nucor S.r.l. [Member] \| Facility A [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investments credit facilities, amount	$ 135,900	$ 135,900		$ 135,900		€ 122.5
Total amount outstanding under equity method investments credit facilities	$ 133,100	$ 133,100		$ 133,100		€ 120.0	129,900	€ 107.0
Guarantor obligation percentage of exposure in case of default	50.00%	50.00%		50.00%		50.00%
NuMit LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment	$ 302,300	$ 302,300		$ 302,300			$ 301,500
Period used for lag basis, in months				1 month
Equity method investment, ownership percentage	50.00%	50.00%		50.00%		50.00%
Steel Technologies LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	100.00%	100.00%		100.00%		100.00%
Number of sheet processing facilities operated by Steel Technologies \| Sheet				25