Entity Central Index Key
Document and Entity Information [Abstract]
Document And Entity Information [Abstract]
Document Type
Document Type
Amendment Flag
Amendment Flag
Document Period End Date
Document Period End Date
Document Fiscal Year Focus
Document Fiscal Year Focus
Document Fiscal Period Focus
Document Fiscal Period Focus
Trading Symbol
Trading Symbol
Entity Registrant Name
Entity Registrant Name
Entity Central Index Key
Current Fiscal Year End Date
Current Fiscal Year End Date
Entity Filer Category
Entity Filer Category
Entity Emerging Growth Company
Entity Emerging Growth Company
Entity Small Business
Entity Small Business
Entity Current Reporting Status
Entity Current Reporting Status
Entity Shell Company
Entity Shell Company
Entity File Number
Entity File Number
Entity Tax Identification Number
Entity Tax Identification Number
Entity Address, Address Line One
Entity Address Address Line1
Entity Address, City or Town
Entity Address City Or Town
Entity Address, State or Province
Entity Address State Or Province
Entity Address, Postal Zip Code
Entity Address Postal Zip Code
City Area Code
City Area Code
Local Phone Number
Local Phone Number
Entity Common Stock, Shares Outstanding
Entity Common Stock Shares Outstanding
The sum of operating and non-operating costs and expenses.
Income Statement [Abstract]
Net sales
Revenue From Contract With Customer Excluding Assessed Tax
Costs, expenses and other:
Costs And Expenses [Abstract]
Cost of products sold
Cost Of Goods And Services Sold
Marketing, administrative and other expenses
Selling General And Administrative Expense
Equity in earnings of unconsolidated affiliates
Income Loss From Equity Method Investments
Interest expense, net
Interest Revenue Expense Net
Costs, expenses and other, total
Costs And Expenses Operating And Nonoperating
Earnings before income taxes and noncontrolling interests
Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest
Provision for income taxes
Income Tax Expense Benefit
Net earnings
Profit Loss
Earnings attributable to noncontrolling interests
Net Income Loss Attributable To Noncontrolling Interest
Net earnings attributable to Nucor stockholders
Net Income Loss
Net earnings per share:
Earnings Per Share [Abstract]
Basic
Earnings Per Share Basic
Diluted
Earnings Per Share Diluted
Average shares outstanding:
Weighted Average Number Of Shares Outstanding Basic [Abstract]
Basic
Weighted Average Number Of Shares Outstanding Basic
Diluted
Weighted Average Number Of Diluted Shares Outstanding
Statement Of Comprehensive Income [Abstract]
Statement Of Comprehensive Income [Abstract]
Net earnings
Other comprehensive income:
Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract]
Net unrealized loss on hedging derivatives, net of income taxes of $(1,700) and $(1,100) for the second quarter of 2019 and 2018, respectively, and $(1,500) and $(600) for the first six months of 2019 and 2018, respectively
Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax
Reclassification adjustment for settlement of hedging derivatives included in net income, net of income taxes of $200 and $100 for the second quarter of 2019 and 2018, respectively, and $0 and $100 for the first six months of 2019 and 2018, respectively
Other Comprehensive Income Loss Reclassification Adjustment From A O C I On Derivatives Net Of Tax
Foreign currency translation gain (loss), net of income taxes of $0 for the second quarter and first six months of 2019 and 2018
Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax
Net current-period other comprehensive income (loss)
Other Comprehensive Income Loss Net Of Tax
Comprehensive income
Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest
Comprehensive income attributable to noncontrolling interests
Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest
Comprehensive income attributable to Nucor stockholders
Comprehensive Income Net Of Tax
Net unrealized loss on hedging derivatives, tax
Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax
Reclassification adjustment for (gain) loss on settlement of hedging derivatives included in net earnings, tax effect
Other Comprehensive Income Loss Reclassification Adjustment From A O C I On Derivatives Tax
Foreign currency translation (loss) gain tax
Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax
Statement Of Financial Position [Abstract]
ASSETS
Assets [Abstract]
Current assets:
Assets Current [Abstract]
Cash and cash equivalents
Cash And Cash Equivalents At Carrying Value
Short-term investments
Short Term Investments
Accounts receivable, net
Accounts Receivable Net Current
Inventories, net
Inventory Net
Other current assets
Other Assets Current
Total current assets
Assets Current
Property, plant and equipment, net
Property Plant And Equipment Net
Goodwill
Goodwill
Other intangible assets, net
Finite Lived Intangible Assets Net
Other assets
Other Assets Noncurrent
Total assets
Assets
LIABILITIES
Liabilities And Stockholders Equity [Abstract]
Current liabilities:
Liabilities Current [Abstract]
Short-term debt
Short Term Borrowings
Accounts payable
Accounts Payable Current
Salaries, wages and related accruals
Employee Related Liabilities Current
Accrued expenses and other current liabilities
Accrued Liabilities Current
Total current liabilities
Liabilities Current
Long-term debt due after one year
Long Term Debt Noncurrent
Deferred credits and other liabilities
Deferred Tax And Other Liabilities Noncurrent
Total liabilities
Liabilities
EQUITY
Stockholders Equity Including Portion Attributable To Noncontrolling Interest [Abstract]
Nucor stockholders' equity:
Stockholders Equity [Abstract]
Common stock
Common Stock Value
Additional paid-in capital
Additional Paid In Capital Common Stock
Retained earnings
Retained Earnings Accumulated Deficit
Accumulated other comprehensive loss, net of income taxes
Accumulated Other Comprehensive Income Loss Net Of Tax
Treasury stock
Treasury Stock Common Value
Total Nucor stockholders' equity
Stockholders Equity
Noncontrolling interests
Minority Interest
Total equity
Stockholders Equity Including Portion Attributable To Noncontrolling Interest
Total liabilities and equity
Liabilities And Stockholders Equity
Change in accrued plant and equipment purchases.
Statement Of Cash Flows [Abstract]
Operating activities:
Net Cash Provided By Used In Operating Activities [Abstract]
Adjustments:
Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract]
Depreciation
Depreciation
Amortization
Adjustment For Amortization
Stock-based compensation
Share Based Compensation
Deferred income taxes
Deferred Income Tax Expense Benefit
Distributions from affiliates
Proceeds From Contributions From Affiliates
Changes in assets and liabilities (exclusive of acquisitions and dispositions):
Increase Decrease In Operating Capital [Abstract]
Accounts receivable
Increase Decrease In Accounts Receivable
Inventories
Increase Decrease In Inventories
Accounts payable
Increase Decrease In Accounts Payable
Federal income taxes
Increase Decrease In Accrued Income Taxes Payable
Salaries, wages and related accruals
Increase Decrease In Employee Related Liabilities
Other operating activities
Increase Decrease In Other Operating Capital Net
Cash provided by operating activities
Net Cash Provided By Used In Operating Activities
Investing activities:
Net Cash Provided By Used In Investing Activities [Abstract]
Capital expenditures
Payments To Acquire Property Plant And Equipment
Investment in and advances to affiliates
Payments To Acquire Interest In Subsidiaries And Affiliates
Divestiture of affiliates
Proceeds From Sale Of Equity Method Investments
Disposition of plant and equipment
Proceeds From Sale Of Property Plant And Equipment
Acquisitions (net of cash acquired)
Payments To Acquire Businesses Net Of Cash Acquired
Purchase of investments
Payments To Acquire Investments
Proceeds from the sale of investments
Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities
Other investing activities
Payments For Proceeds From Other Investing Activities
Cash used in investing activities
Net Cash Provided By Used In Investing Activities
Financing activities:
Net Cash Provided By Used In Financing Activities [Abstract]
Net change in short-term debt
Proceeds From Repayments Of Short Term Debt
Proceeds from long-term debt, net of discount
Proceeds From Issuance Of Long Term Debt
Repayment of long-term debt
Repayments Of Long Term Debt
Bond issuance related costs
Payment Of Financing And Stock Issuance Costs
Issuance of common stock
Proceeds From Issuance Of Common Stock
Payment of tax withholdings on certain stock-based compensation
Payments Related To Tax Withholding For Share Based Compensation
Distributions to noncontrolling interests
Payments Of Dividends Minority Interest
Cash dividends
Payments Of Dividends Common Stock
Acquisition of treasury stock
Payments For Repurchase Of Common Stock
Other financing activities
Proceeds From Payments For Other Financing Activities
Cash (used in) provided by financing activities
Net Cash Provided By Used In Financing Activities
Effect of exchange rate changes on cash
Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations
Increase in cash and cash equivalents
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect
Cash and cash equivalents - beginning of year
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations
Cash and cash equivalents - end of six months
Non-cash investing activity:
Cash Flow Noncash Investing And Financing Activities Disclosure [Abstract]
Change in accrued plant and equipment purchases
Change In Accrued Plant And Equipment Purchases
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Interim Presentation
Organization Consolidation And Presentation Of Financial Statements Disclosure [Text Block]
Inventory Disclosure [Abstract]
Inventories
Inventory Disclosure [Text Block]
Property Plant And Equipment [Abstract]
Property, Plant and Equipment
Property Plant And Equipment Disclosure [Text Block]
The entire disclosure for finance leases and operating leases of lessee. Includes, but is not limited to, description of lessee's finance lease and maturity analysis of finance lease liability.
Disclosure of Leases
Disclosure Of Leases [Abstract]
Leases
Lessee Finance Operating Leases [Text Block]
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets
Goodwill And Intangible Assets Disclosure [Text Block]
Equity Method Investments And Joint Ventures [Abstract]
Equity Investments
Equity Method Investments Disclosure [Text Block]
Payables And Accruals [Abstract]
Current Liabilities
Accounts Payable Accrued Liabilities And Other Liabilities Disclosure Current [Text Block]
Fair Value Disclosures [Abstract]
Fair Value Measurements
Fair Value Disclosures [Text Block]
Commitments And Contingencies Disclosure [Abstract]
Contingencies
Commitments And Contingencies Disclosure [Text Block]
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-Based Compensation
Disclosure Of Compensation Related Costs Share Based Payments [Text Block]
Compensation And Retirement Disclosure [Abstract]
Employee Benefit Plans
Pension And Other Postretirement Benefits Disclosure [Text Block]
Banking And Thrift Interest [Abstract]
Interest Expense (Income)
Interest Income And Interest Expense Disclosure [Text Block]
Income Tax Disclosure [Abstract]
Income Taxes
Income Tax Disclosure [Text Block]
Federal Home Loan Banks [Abstract]
Stockholders' Equity
Stockholders Equity Note Disclosure [Text Block]
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)
Comprehensive Income Note [Text Block]
Segment Reporting [Abstract]
Segments
Segment Reporting Disclosure [Text Block]
Revenue From Contract With Customer [Abstract]
Revenue
Revenue From Contract With Customer [Text Block]
Earnings Per Share
Earnings Per Share [Text Block]
Recently Adopted Accounting Pronouncements
New Accounting Pronouncements Policy Policy [Text Block]
Combined tabular disclosure of supplemental cash flow Information for both operating and finance leases.
Supplemental cash flow information leases operating finance
Supplemental Cash Flow Information Leases Operating Finance Table [Text Block]
Combined tabular disclosure of lessee balance sheet information for both operating and finance leases.
Lessee balance sheet information
Lessee Balance Sheet Information Table [Text Block]
Combined tabular disclosure of weighted average lease term and weighted average discount rate of operating and finance leases.
Weighted average lease term discount rate finance operating
Weighted Average Lease Term Discount Rate Finance Operating Table [Text Block]
Tabular disclosure of undiscounted cash flows of lessee's operating lease and finance lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease and finance lease liability recognized in statement of financial position.
Lessee operating finance lease liability maturity
Lessee Operating Finance Lease Liability Maturity Table [Text Block]
Schedule of Change in Net Carrying Amount of Goodwill by Segment
Schedule Of Goodwill [Text Block]
Schedule of Intangible Assets
Schedule Of Finite Lived Intangible Assets Table [Text Block]
Schedule of Financial Assets and Liabilities Measured at Fair Value
Schedule Of Fair Value Assets And Liabilities Measured On Recurring Basis Table [Text Block]
Summary of Stock Option Plans Activity
Schedule Of Share Based Compensation Stock Options Activity Table [Text Block]
Schedule of Grant Date Fair Value Black-Scholes Option-Pricing Model Assumptions
Schedule Of Share Based Payment Award Stock Options Valuation Assumptions Table [Text Block]
Summary of Nucor's RSU Activity
Schedule Of Share Based Compensation Restricted Stock Units Award Activity Table [Text Block]
Summary of Nucor's Restricted Stock Activity under AIP and LTIP
Schedule Of Sharebased Compensation Restricted Stock And Restricted Stock Units Activity Table [Text Block]
Schedule of Components of Net Interest Expense
Interest Income And Interest Expense Disclosure Table [Text Block]
Tabular disclosure of changes in the separate accounts comprising stockholders' equity (in addition to retained earnings) during at least the most recent annual fiscal period and any subsequent interim period presented is required to make the financial statements sufficiently informative if both financial position and results of operations are presented.
Schedule Of Changes In Stock Holders Equity
Schedule Of Changes In Stock Holders Equity Table [Text Block]
Components of Accumulated Other Comprehensive Income (Loss)
Schedule Of Accumulated Other Comprehensive Income Loss Table [Text Block]
Segments
Schedule Of Segment Reporting Information By Segment [Text Block]
Schedule of Net Sales Disaggregates by Major Source
Disaggregation Of Revenue Table [Text Block]
Computations of Basic and Diluted Net Earnings Per Share
Schedule Of Earnings Per Share Basic And Diluted Table [Text Block]
Anti-dilutive Stock Options
Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Text Block]
Increase in total assets due to adoption of new accounting standard.
Increase in total liabilities due to adoption of new accounting standard.
Adoption Of New Accounting Standard Increase Decrease In Total Assets
Adoption Of New Accounting Standard Increase Decrease In Total Assets
Adoption Of New Accounting Standard Increase Decrease In Total Liabilities
Adoption Of New Accounting Standard Increase Decrease In Total Liabilities
Raw material and supplies in inventory, percentage.
Finished and semi-finished products in inventory, percentage.
Raw materials and supplies in inventory, percentage
Raw Material And Supplies In Inventory Percentage
Finished and semi-finished products in inventory, percentage
Finished And Semi Finished Products In Inventory Percentage
Schedule Of Property Plant And Equipment [Table]
Schedule Of Property Plant And Equipment [Table]
Property, Plant and Equipment, Type
Property Plant And Equipment By Type [Axis]
Property, Plant and Equipment, Type
Property Plant And Equipment Type [Domain]
Carrying value of the two field of wells.
Carrying Value of Two Field of Wells [Member]
Carrying Value Of The Two Field Of Wells [Member]
Carrying value of the third field of wells.
Carrying Value of Third Field of Wells [Member]
Carrying Value Of The Third Field Of Wells [Member]
Property, Plant and Equipment [Line Items]
Property Plant And Equipment [Line Items]
Accumulated depreciation
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
Impairment of assets
Asset Impairment Charges
Disclosure of Leases
Disclosure of Leases
Disclosure Of Leases [Table]
Disclosure Of Leases [Table]
Range
Range [Axis]
Range
Range [Member]
Minimum [Member]
Minimum [Member]
Maximum [Member]
Maximum [Member]
Income Statement Location
Income Statement Location [Axis]
Income Statement Location
Income Statement Location [Domain]
Cost of Sales [Member]
Cost Of Sales [Member]
Interest Expense [Member]
Interest Expense [Member]
Marketing, Administrative and Other Expenses [Member]
Selling General And Administrative Expenses [Member]
Disclosure of Leases [Line Items]
Disclosure Of Leases [Line Items]
Operating lease, renewal term
Lessee Operating Lease Option To Extend
Operating lease, renewal period
Lessee Operating Lease Renewal Term
The total costs related to finance leases.
Lease, cost
Lease Cost
Total finance lease cost
Finance Lease Cost
Finance lease, right-of-use asset, amortization
Finance Lease Right Of Use Asset Amortization
Finance lease, interest expense
Finance Lease Interest Expense
Operating lease, cost
Operating Lease Cost
Cash Paid for Amounts Measurement of Lease Liabilities
Asset Class
Fair Value By Asset Class [Axis]
Asset Class
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation By Asset Class [Domain]
Property, plant and equipment, net
Property Plant And Equipment [Member]
Balance Sheet Location
Balance Sheet Location [Axis]
Balance Sheet Location
Balance Sheet Location [Domain]
Accrued expenses and other current liabilities.
Accrued expenses and other current liabilities
Accrued Expenses And Other Current Liabilities [Member]
Deferred credits and other liabilities.
Deferred credits and other liabilities
Deferred Credits And Other Liabilities [Member]
Cash paid for amounts included in measurement of lease liabilities:
Cash Paid For Amounts Measurement Of Lease Liabilities [Abstract]
Operating cash flows from operating leases
Operating Lease Payments Use
Operating cash flows from finance leases
Finance Lease Interest Payment On Liability
Financing cash flows from finance leases
Finance Lease Principal Payments
Operating and finance lease assets.
Operating and finance lease liabilities.
Assets
Operating lease assets
Operating Lease Right Of Use Asset
Finance lease assets
Finance Lease Right Of Use Asset
Total leased assets
Operating And Finance Lease Assets
Liabilities
Liabilities [Abstract]
Current operating
Operating Lease Liability Current
Current finance
Finance Lease Liability Current
Non-current operating
Operating Lease Liability Noncurrent
Non-current finance
Finance Lease Liability Noncurrent
Total leased liabilities
Operating And Finance Lease Liabilities
Weighted-average remaining lease term - operating leases
Operating Lease Weighted Average Remaining Lease Term1
Weighted-average remaining lease term - finance leases
Finance Lease Weighted Average Remaining Lease Term1
Weighted-average discount rate - operating leases
Operating Lease Weighted Average Discount Rate Percent
Weighted-average discount rate - finance leases
Finance Lease Weighted Average Discount Rate Percent
Maturity Of Lease Liabilities
Maturity Of Lease Liabilities [Abstract]
Maturity Of Lease Liabilities [Abstract]
2019
Lessee Operating Lease Liability Payments Remainder Of Fiscal Year
2020
Lessee Operating Lease Liability Payments Due Year Two
2021
Lessee Operating Lease Liability Payments Due Year Three
2022
Lessee Operating Lease Liability Payments Due Year Four
2023
Lessee Operating Lease Liability Payments Due Year Five
Thereafter
Lessee Operating Lease Liability Payments Due After Year Five
Total lease payments
Lessee Operating Lease Liability Payments Due
Less imputed interest
Lessee Operating Lease Liability Undiscounted Excess Amount
Present value of lease liabilities
Operating Lease Liability
2019
Finance Lease Liability Payments Remainder Of Fiscal Year
2020
Finance Lease Liability Payments Due Year Two
2021
Finance Lease Liability Payments Due Year Three
2022
Finance Lease Liability Payments Due Year Four
2023
Finance Lease Liability Payments Due Year Five
Thereafter
Finance Lease Liability Payments Due After Year Five
Total lease payments
Finance Lease Liability Payments Due
Less imputed interest
Finance Lease Liability Undiscounted Excess Amount
Present value of lease liabilities
Finance Lease Liability
Amount of combined minimum lease payments for capital leases due in the second and third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.
Amount of combined minimum lease payments for capital leases due in the fourth and fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.
Capital leases, future minimum payments due
Capital Leases Future Minimum Payments Due
Capital leases, future minimum payments due, next twelve months
Capital Leases Future Minimum Payments Due Current
Capital leases future minimum payments due in second third years
Capital Leases Future Minimum Payments Due In Second Third Years
Capital leases future minimum payments due in fourth fifth years
Capital Leases Future Minimum Payments Due In Fourth Fifth Years
Capital leases, future minimum payments due thereafter
Capital Leases Future Minimum Payments Due Thereafter
Amount of combined minimum lease payments for operating leases due in the second and third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.
Amount of combined minimum lease payments for operating leases due in the fourth and fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.
Operating leases, future minimum payments due
Operating Leases Future Minimum Payments Due
Operating leases, future minimum payments due, next twelve months
Operating Leases Future Minimum Payments Due Current
Operating leases future minimum payments due in second third years
Operating Leases Future Minimum Payments Due In Second Third Years
Operating leases future minimum payments due in fourth fifth years
Operating Leases Future Minimum Payments Due In Fourth Fifth Years
Operating leases, future minimum payments, due thereafter
Operating Leases Future Minimum Payments Due Thereafter
Capital leased assets, gross
Capital Leased Assets Gross
Intangible Liability Disclosure [Abstract]
Intangible Liability Disclosure [Abstract]
Schedule Of Goodwill [Table]
Schedule Of Goodwill [Table]
Segments
Statement Business Segments [Axis]
Segments
Segment [Domain]
Steel mills.
Steel Mills [Member]
Steel Mills [Member]
Steel products.
Steel Products [Member]
Steel Products [Member]
Raw materials.
Raw Materials [Member]
Raw Materials [Member]
Goodwill [Line Items]
Goodwill [Line Items]
Balance, beginning of period
Translation
Goodwill Foreign Currency Translation Gain Loss
Reclassifications
Goodwill Transfers
Balance, end of period
Percentage by which fair value exceeded carrying value in the most recent assessment that was performed.
Finite And Indefinite Lived Intangible Assets [Line Items]
Finite And Indefinite Lived Intangible Assets [Table]
Finite And Indefinite Lived Intangible Assets [Table]
Finite And Indefinite Lived Intangible Assets [Table]
Product and Service
Product Or Service [Axis]
Product and Service
Products And Services [Domain]
Rebar Fabrication [Member]
Rebar Fabrication [Member]
Rebar Fabrication [Member]
Grating unit [Member]
Grating unit [Member]
Grating Unit [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Finite And Indefinite Lived Intangible Assets [Line Items]
Percentage of fair value exceeded carrying value
Percentage By Which Fair Value Exceeded Carrying Value
Finite-lived intangible assets
Intangible assets, useful life
Finite Lived Intangible Asset Useful Life
Schedule Of Finite Lived Intangible Assets [Table]
Schedule Of Finite Lived Intangible Assets [Table]
Finite-Lived Intangible Assets by Major Class
Finite Lived Intangible Assets By Major Class [Axis]
Finite-Lived Intangible Assets, Major Class Name
Finite Lived Intangible Assets Major Class Name [Domain]
Customer Relationships [Member]
Customer Relationships [Member]
Trademarks and Trade Names [Member]
Trademarks And Trade Names [Member]
Other [Member]
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets [Line Items]
Intangible assets, Gross Amount
Finite Lived Intangible Assets Gross
Intangible assets, Accumulated Amortization
Finite Lived Intangible Assets Accumulated Amortization
Intangible asset amortization expense
Amortization Of Intangible Assets
Future amortization expense, in 2019
Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year
Future amortization expense, in 2020
Finite Lived Intangible Assets Amortization Expense Year Two
Future amortization expense, in 2021
Finite Lived Intangible Assets Amortization Expense Year Three
Future amortization expense, in 2022
Finite Lived Intangible Assets Amortization Expense Year Four
Future amortization expense, in 2023
Finite Lived Intangible Assets Amortization Expense Year Five
Schedule Of Equity Method Investments [Table]
Schedule Of Equity Method Investments [Table]
Investment, Name
Schedule Of Equity Method Investment Equity Method Investee Name [Axis]
Investment, Name
Equity Method Investee Name [Domain]
NuMit [Member]
NuMit LLC [Member]
Numit [Member]
Steel Technologies LLC [Member]
Steel Technologies LLC [Member]
Steel Technologies L L C [Member]
Duferdofin Nucor S.r.l
Duferdofin Nucor S.r.l. [Member]
Duferdofin [Member]
Investment
Investment [Axis]
Investment
Investment [Domain]
Facility [Member]
Facility A [Member]
Facility [Member]
Nucor JFE [Member]
Nucor-JFE [Member]
Nucor J F E [Member]
Schedule Of Equity Method Investments [Line Items]
Schedule Of Equity Method Investments [Line Items]
Equity method investments
Equity Method Investments
The subsidiary's percentage of ownership of common stock or equity participation in a company.
Period used for lag basis.
Number of sheet processing facilities operated by equity investment.
Equity method investment, ownership percentage
Equity Method Investment Ownership Percentage
Equity method investment, ownership percentage
Equity Method Investment Subsidiary Ownership Percentage
Number of sheet processing facilities operated by Steel Technologies
Number Of Sheet Processing Facilities Operated By Equity Investment
Period used for lag basis, in months
Period Used For Lag Basis
Step-up to fair value of equity method investment, portion related to identification of goodwill.
Equity method investments, share of net assets
Equity Method Investment Underlying Equity In Net Assets
Basis difference due to the step-up to fair value of certain assets and liabilities
Equity Method Investment Difference Between Carrying Amount And Underlying Equity
Step-up to fair value of equity method investment, portion related to identification of goodwill
Step Up To Fair Value Of Equity Method Investment Portion Related To Identification Of Goodwill
Interest rate per year in excess of Euribor as of date of the note.
Due from related parties, noncurrent
Due From Related Parties Noncurrent
Notes receivable, related parties, interest rate
Related Party Transaction Rate
Interest rate per year in excess of Euribor as of date of the notes
Interest Rate Per Year In Excess Of Euribor As Of Date Of Note
Equity method investments notes payable with parent company, maturity date
Related Party Transaction Date
The equity method investments available credit facilities subject to guarantee.
Total amount outstanding under equity method investments applicable credit facilities.
Guarantor obligation percentage of exposure in case of default.
Equity method investments credit facilities, amount
Equity Method Investments Credit Facilities
Total amount outstanding under equity method investments credit facilities
Equity Method Investments Applicable Credit Facilities Amount Outstanding
Guarantor obligation percentage of exposure in case of default
Guarantor Obligation Percentage Of Exposure In Case Of Default
Line of credit facility, maturity period
Line Of Credit Facility Expiration Date1
The carrying value of outstanding disbursements (checks) written and issued by the entity but have not been presented to the financial institution.
Book overdrafts
Book Overdrafts
Dividends payable, current
Dividends Payable Current
Debt Instrument Fair Value Carrying Value [Abstract]
Debt Instrument Fair Value Carrying Value [Abstract]
Fair Value By Balance Sheet Grouping [Table]
Fair Value By Balance Sheet Grouping [Table]
Fair Value Hierarchy and NAV
Fair Value By Fair Value Hierarchy Level [Axis]
Fair Value Hierarchy and NAV
Fair Value Measurements Fair Value Hierarchy [Domain]
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Inputs Level1 [Member]
Significant Other Observable Inputs (Level 2) [Member]
Fair Value Inputs Level2 [Member]
Significant Unobservable Inputs (Level 3) [Member]
Fair Value Inputs Level3 [Member]
Measurement Frequency
Fair Value By Measurement Frequency [Axis]
Fair Value, Measurement Frequency
Fair Value Measurement Frequency [Domain]
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Recurring [Member]
Measurement Basis
Fair Value By Measurement Basis [Axis]
Fair Value Disclosure Item Amounts [Default]
Portion At Fair Value Fair Value Disclosure [Member]
Fair Value Measurement
Fair Value Disclosure Item Amounts [Domain]
Reported Value Measurement [Member]
Carrying Reported Amount Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Cash equivalents
Cash Equivalents At Carrying Value
Derivative contracts
Derivative Assets
Total assets
Total assets
Assets Fair Value Disclosure
Derivative contracts
Derivative Liabilities
The fair value amount of short-term and long-term debt, including current maturities, whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.
Fair value of short-term and long-term debt, including current maturities
Short And Long Term Debt Fair Value
Accrual for environmental loss contingencies, gross
Accrual For Environmental Loss Contingencies Gross
Accrued environmental loss contingencies, current
Accrued Environmental Loss Contingencies Current
Accrued environmental loss contingencies, noncurrent
Accrued Environmental Loss Contingencies Noncurrent
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]
Award Type
Award Type [Axis]
Equity Award
Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain]
Stock Options [Member]
Employee Stock Option [Member]
Restricted Stock Units [Member]
Restricted Stock Units R S U [Member]
Plan Name
Plan Name [Axis]
Plan Name
Plan Name [Domain]
Omnibus Plan [Member]
Omnibus Plan [Member]
Omnibus Plan [Member]
Ltip
LTIP [Member]
Ltip [Member]
AIP.
AIP [Member]
Aip [Member]
Restricted Stock And Restricted Stock Units [Member]
Restricted Stock Awards and Units [Member]
Restricted Stock And Restricted Stock Units [Member]
AIP and LTIP.
AIP and LTIP [Member]
Aip And Ltip [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock based compensation, common stock available for grant
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized
Stock based compensation, common stock available for grant
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant
Shares reserved for future issuance
Common Stock Capital Shares Reserved For Future Issuance
Stock option exercise price as percentage of market value.
The period in which a stock option can be exercised.
Stock options exercise prices as percentage of the market value on the date of the grant
Stock Option Exercise Price As Percentage Of Market Value
Stock options vesting period
Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1
Stock options term, years
Stock Option Term
Outstanding at beginning of year, Shares
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number
Granted, Shares
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period
Exercised, Shares
Stock Issued During Period Shares Stock Options Exercised
Canceled, Shares
Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period
Outstanding at end of year, Shares
Options exercisable at end of year, Shares
Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number
Outstanding at beginning of year, Weighted - Average Exercise Price
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price
Granted, Weighted - Average Exercise Price
Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price
Exercised, Weighted - Average Exercise Price
Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price
Canceled, Weighted - Average Exercise Price
Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price
Outstanding at end of period, Weighted - Average Exercise Price
Options exercisable at end of year, Weighted - Average Exercise Price
Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price
Outstanding, Weighted - Average Remaining Contractual Life
Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2
Stock options exercisable, Weighted - Average Remaining Contractual Life
Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1
Exercised, Aggregate Intrinsic Value
Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value
Outstanding at end of year, Aggregate Intrinsic Value
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value
Stock options exercisable, Aggregate Intrinsic Value
Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1
Grant date fair value of stock options granted
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value
Exercise price
Expected dividend yield
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate
Expected stock price volatility
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate
Risk-free interest rate
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate
Expected life (years)
Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1
Compensation expenses for stock options
Stock Option Plan Expense
Unrecognized compensation expense related to stock
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized
Weighted-average recognition period for unrecognized compensation expense related to stock (years)
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1
Number of anniversaries of grant date upon which restricted stock units vest.
Istallments in which restricted stock units vest and are converted to common stock.
Number Of Anniversaries Of Grant Date Upon Which Restricted Stock Units Vest
Number Of Anniversaries Of Grant Date Upon Which Restricted Stock Units Vest
Installments in Which Restricted Stock Units Vest and are Converted to Common Stock
Installments In Which Restricted Stock Units Vest And Are Converted To Common Stock
Unvested at beginning of year, Shares
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number
Granted, Shares
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period
Vested, Shares
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period
Canceled, Shares
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period
Unvested at end of year, Shares
Unvested at beginning of year, Grant Date Fair Value
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value
Granted, Grant Date Fair Value
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value
Vested, Grant Date Fair Value
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value
Canceled, Grant Date Fair Value
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value
Unvested at end of year, Grant Date Fair Value
Compensation expense
Allocated Share Based Compensation Expense
Age for eligible employee.
Eligible age of officer for restricted stock award
Age For Eligible Employee
Additional common stock units for election of deferred annual incentive award, percentage.
Additional common stock units for election of deferred annual incentive award, percentage
Additional Common Stock Units For Election Of Deferred Annual Incentive Award Percentage
Restricted Stock Units and Restricted Stock Awards [Member]
Granted, Shares
Canceled, Shares
Granted, Grant Date Fair Value
Vested, Grant Date Fair Value
Costs and payments related to employee profit sharing and retirement savings plans.
Employee Benefit Plan [Abstract]
Employee Benefit Plan [Abstract]
Profit Sharing and Retirement Savings Plan, plan expense
Profit Sharing And Retirement Savings Plan Expense
Interest Revenue Or Expense Net [Abstract]
Interest expense
Interest Expense
Interest income
Investment Income Interest
Interest expense, net
Benefit related to state tax credits and tax return true-ups.
Effective income tax rate
Effective Income Tax Rate Continuing Operations
Benefit related to state tax credits and tax return true-ups
Benefit Related To State Tax Credits And Tax Return True Ups
Non-current deferred tax liabilities included in deferred credits and other liabilities
Deferred Tax Liabilities Noncurrent
Non-current deferred tax assets included in other assets
Deferred Tax Assets Net Noncurrent
Statement [Table]
Statement [Table]
Ownership
Ownership [Axis]
Ownership
Ownership [Domain]
Nucor-Yamato Steel Company.
Nucor Yamato Steel Company [Member]
Nucor Yamato Steel Company [Member]
Equity Components
Statement Equity Components [Axis]
Equity Component
Equity Component [Domain]
Common Stock [Member]
Common Stock [Member]
Statement [Line Items]
Statement [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent
Minority Interest Ownership Percentage By Parent
Amortization of unearned compensation related to incentive compensation plans.
Additional Paid-in Capital [Member]
Additional Paid In Capital [Member]
Retained Earnings [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income [Member]
Treasury Stock [Member]
Treasury Stock [Member]
Total Nucor Stockholders' Equity [Member]
Parent [Member]
Noncontrolling Interest [Member]
Noncontrolling Interest [Member]
BALANCES, beginning of period
BALANCES, shares at beginning of period
Shares Issued
Other comprehensive income (loss)
Stock options exercised
Stock Issued During Period Value Stock Options Exercised
Stock options exercised (in shares)
Stock option expense
Adjustments To Additional Paid In Capital Share Based Compensation Stock Options Requisite Service Period Recognition
Issuance of stock under award plans, net of forfeitures
Stock Issued During Period Value Share Based Compensation
Issuance of stock under award plans, net of forfeitures, shares
Stock Issued During Period Shares Share Based Compensation
Amortization of unearned compensation
Amortization Unearned Compensation
Treasury stock value acquired
Treasury Stock Value Acquired Cost Method
Treasury stock acquired (in shares)
Treasury Stock Shares Acquired
Cash dividends declared
Dividends Cash
Distributions to noncontrolling interests
Minority Interest Decrease From Distributions To Noncontrolling Interest Holders
Other
Stockholders Equity Other
BALANCES, end of period
BALANCES, shares at end of period
Common Stock, Dividends, Per Share, Declared
Common Stock Dividends Per Share Declared
Stock Repurchase Program, Authorized Amount
Stock Repurchase Program Authorized Amount1
Share repurchase program, available repurchase amount
Stock Repurchase Program Remaining Authorized Repurchase Amount1
Accumulated other comprehensive income loss gains losses on hedging derivatives other.
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Beginning Balance, Gains and Losses on Hedging Derivatives
Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax
Other comprehensive income (loss) before reclassifications, Gains and Losses on Hedging Derivatives
Amounts reclassified from accumulated other comprehensive (loss) income into earnings, Gains and Losses on Hedging Derivatives
Net current-period other comprehensive income (loss), Gains and Losses on Hedging Derivatives
Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax
Accumulated other comprehensive income loss, Gains and Losses on Hedging Derivatives Other
Accumulated Other Comprehensive Income Loss Gains Losses On Hedging Derivatives Other
Ending Balance, Gains and Losses on Hedging Derivatives
Accumulated other comprehensive income loss foreign currency gain loss other.
Beginning Balance, Foreign Currency Gains (Losses)
Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax
Other comprehensive income (loss) before reclassifications, Foreign Currency Gains (Losses)
Amounts reclassified from accumulated other comprehensive income (loss) into earnings, Foreign Currency Gains (Losses)
Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From A O C I Realized Upon Sale Or Liquidation Net Of Tax
Net current-period other comprehensive income (loss), Foreign Currency Gains (Losses)
Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax
Accumulated other comprehensive income loss, Foreign Currency Gains Losses Other
Accumulated Other Comprehensive Income Loss Foreign Currency Gain Loss Other
Ending Balance, Foreign Currency Gains (Losses)
Accumulated other comprehensive income loss defined benefit pension and other postretirement plans other net of tax.
Beginning Balance, Adjustment to Early Retiree Medical Plan
Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax
Other comprehensive income (loss) before reclassifications, Adjustment to Early Retiree Medical Plan
Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax
Amounts reclassified from accumulated other comprehensive (loss) income into earnings, Adjustment to Early Retiree Medical Plan
Other Comprehensive Income Loss Reclassification Adjustment From A O C I Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax
Net current-period other comprehensive income (loss), Adjustment to Early Retiree Medical Plan
Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax
Accumulated other comprehensive income loss defined benefit pension and other postretirement plans other net of tax
Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Post Retirement Plans Other Net Of Tax
Ending Balance, Adjustment to Early Retiree Medical Plan
Accumulated other comprehensive income loss other net of tax.
Beginning Balance
Other comprehensive income (loss) before reclassifications
Other Comprehensive Income Loss Before Reclassifications Net Of Tax
Amounts reclassified from accumulated other comprehensive income (loss) into earnings
Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax
Accumulated other comprehensive income loss other net of tax
Accumulated Other Comprehensive Income Loss Other Net Of Tax
Ending Balance
Accumulated Other Comprehensive Income Loss [Table]
Accumulated Other Comprehensive Income Loss [Table]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income Loss [Line Items]
AOCI reclassification impact on tax
Schedule Of Segment Reporting Information By Segment [Table]
Schedule Of Segment Reporting Information By Segment [Table]
Consolidation Items
Consolidation Items [Axis]
Consolidation Items
Consolidation Items [Domain]
Operating Segments [Member]
Operating Segments [Member]
Intercompany Eliminations [Member]
Intersegment Elimination [Member]
Corporate and Eliminations Items [Member]
Consolidation Eliminations [Member]
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Earnings (loss) before income taxes and noncontrolling interests
Revenue from contract with customers line items.
Revenue from contract with customers.
Revenue From Contract With Customers [Table]
Revenue From Contract With Customers [Table]
Sheet.
Sheet [Member]
Sheet [Member]
Bar.
Bar [Member]
Bar [Member]
Structural.
Structural [Member]
Structural [Member]
Plate.
Plate [Member]
Plate [Member]
Tubular products.
Tubular Products [Member]
Tubular Products [Member]
Other steel products.
Other Steel Products [Member]
Other Steel Products [Member]
Revenue from Contract with Customers [Line Items]
Revenue From Contract With Customers [Line Items]
Revenues
Revenues
Basic net earnings
Earnings allocated to participating securities, Basic
Participating Securities Distributed And Undistributed Earnings Loss Basic
Net earnings available to common stockholders, Basic
Net Income Loss Available To Common Stockholders Basic
Average shares outstanding
Basic net earnings per share
Diluted net earnings
Earnings allocated to participating securities, Diluted
Participating Securities Distributed And Undistributed Earnings Loss Diluted
Net earnings available to common stockholders, Diluted
Net Income Loss Available To Common Stockholders Diluted
Dilutive effect of stock options and other
Weighted Average Number Diluted Shares Outstanding Adjustment
Diluted average shares outstanding
Diluted net earnings per share
Antidilutive Securities Excluded From Computation Of Earnings Per Share Weighted Average Exercise Price
Weighted-average shares
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount
Weighted-average exercise price
Antidilutive Securities Excluded From Computation Of Earnings Per Share Weighted Average Exercise Price