XML 81 R61.htm IDEA: XBRL DOCUMENT
v3.20.4

Equity Investments - Additional Information (Detail) € 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, 2020 USD ($) Sheet | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2020 EUR (€) | Dec. 15, 2020 USD ($) | Dec. 31, 2019 EUR (€) | Jan. 16, 2019
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Equity method investments | $ 520,000,000.0 |  |  |  | $ 520,000,000.0 | $ 793,200,000 |  |  |  |  |
Equity method investments impairment charges |  |  |  |  | 613,640,000 | 66,916,000 | $ 110,000,000 |  |  |  |
NuMit LLC [Member] |  |  |  |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Equity method investments | $ 323,600,000 |  |  |  | $ 323,600,000 | 319,800,000 |  |  |  |  |
Equity method investment, ownership percentage | 50.00% |  |  |  | 50.00% |  |  | 50.00% |  |  |
Period used for lag basis, in months |  |  |  |  | 1 month |  |  |  |  |  |
Distributions from affiliates |  |  |  |  | $ 9,500,000 | 36,500,000 | $ 29,200,000 |  |  |  |
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 |  |  |  |  | 26 |  |  |  |  |  |
Duferdofin Nucor S.r.l. [Member] |  |  |  |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Equity method investments | $ 0 |  |  |  | $ 0 | 263,000,000.0 |  |  |  |  |
Equity method investment, ownership percentage | 50.00% |  |  |  | 50.00% |  |  | 50.00% |  |  |
Period used for lag basis, in months |  |  |  |  | 1 month |  |  |  |  |  |
Percentage of interest held by other party in other entity | 100.00% |  |  |  | 100.00% |  |  | 100.00% |  |  |
Due from related parties, noncurrent | $ 37,800,000 |  |  |  | $ 37,800,000 | 39,300,000 |  | € 35.0 |  | € 35.0 |
Equity method investments impairment charges | 25,400,000 | $ 6,600,000 | $ 5,000,000.0 | $ 250,000,000.0 |  |  |  |  |  |  |
Cumulative foreign currency translation losses reclassified into earnings | 158,600,000 |  |  |  |  |  |  |  |  |  |
Equity method investments impairment charges | 184,000,000.0 |  |  | $ 287,800,000 | 483,500,000 |  |  |  |  |  |
Nucor-JFE [Member] |  |  |  |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Equity method investments | $ 147,100,000 |  |  |  | $ 147,100,000 | 163,200,000 |  |  |  |  |
Equity method investment, ownership percentage | 50.00% |  |  |  | 50.00% |  |  | 50.00% |  |  | 50.00%
Principal amount subject to guarantee for other credit facilities | $ 25,000,000.0 |  |  |  | $ 25,000,000.0 | 25,000,000.0 |  |  |  |  |
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 |  |  |  |  |  |  |  |  | $ 90,000,000.0 |  |
Total amount outstanding under equity method investments credit facilities | $ 50,000,000.0 |  |  |  | $ 50,000,000.0 | $ 0 |  |  |  |  |
Guarantor obligation percentage of exposure in case of default | 50.00% |  |  |  | 50.00% |  |  | 50.00% |  |  |

X
- Definition The subsidiary's percentage of ownership of common stock or equity participation in a company. + References No definition available. + Details
Name: | nue_EquityMethodInvestmentSubsidiaryOwnershipPercentage
Namespace Prefix: | nue_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total amount outstanding under equity method investments applicable credit facilities. + References No definition available. + Details
Name: | nue_EquityMethodInvestmentsApplicableCreditFacilitiesAmountOutstanding
Namespace Prefix: | nue_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The equity method investments available credit facilities subject to guarantee. + References No definition available. + Details
Name: | nue_EquityMethodInvestmentsCreditFacilitiesSubjectToGuarantee
Namespace Prefix: | nue_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Equity method investments principal amount subject to guarantee for other credit facilities. + References No definition available. + Details
Name: | nue_EquityMethodInvestmentsPrincipalAmountSubjectToGuaranteeForOtherCreditFacilities
Namespace Prefix: | nue_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Guarantor obligation percentage of exposure in case of default. + References No definition available. + Details
Name: | nue_GuarantorObligationPercentageOfExposureInCaseOfDefault
Namespace Prefix: | nue_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Charges related to impairments, losses or cumulative foreign currency translation losses reclassified into earnings related to certain assets. + References No definition available. + Details
Name: | nue_LossesAndImpairmentsOfAssets
Namespace Prefix: | nue_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of sheet processing facilities operated by equity investment. + References No definition available. + Details
Name: | nue_NumberOfSheetProcessingFacilitiesOperatedByEquityInvestment
Namespace Prefix: | nue_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of interest held by other party in other entity. + References No definition available. + Details
Name: | nue_PercentageOfInterestHeldByOtherPartyInOtherEntity
Namespace Prefix: | nue_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Period used for lag basis. + References No definition available. + Details
Name: | nue_PeriodUsedForLagBasis
Namespace Prefix: | nue_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.11) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(k)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 + Details
Name: | us-gaap_DueFromRelatedPartiesNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 35 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=118954474&loc=d3e32787-111569 + Details
Name: | us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
Name: | us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109237563&loc=d3e33749-111570 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8813-108599 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -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
Name: | us-gaap_EquityMethodInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e640-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580 + Details
Name: | us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash inflow from an entity that is affiliated with the entity by means of direct or indirect ownership. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromContributionsFromAffiliates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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
Name: | us-gaap_ScheduleOfEquityMethodInvestmentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=nue_NumitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=nue_SteelTechnologiesLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=nue_DuferdofinMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=nue_NucorJFEMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=nue_GeneralFinancingAgreementAndPromissoryNoteMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |