Nucor (NUE) 10-Q 6 Nov 24 2024 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information	9 Months Ended
	Sep. 28, 2024 shares
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 28, 2024
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q3
Trading Symbol	NUE
Entity Registrant Name	NUCOR CORPORATION
Entity Central Index Key	0000073309
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity Interactive Data Current	Yes
Title of 12(b) Security	Common Stock, par value $0.40 per share
Security Exchange Name	NYSE
Entity Incorporation, State or Country Code	DE
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	1-4119
Entity Tax Identification Number	13-1860817
Entity Address, Address Line One	1915 Rexford Road
Entity Address, City or Town	Charlotte
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	28211
City Area Code	704
Local Phone Number	366-7000
Entity Common Stock, Shares Outstanding	234,812,916

Condensed Consolidated Statemen

Condensed Consolidated Statements of Earnings - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Income Statement [Abstract]
Net sales	$ 7,444,160	$ 8,775,734	$ 23,658,415	$ 27,008,970
Costs, expenses and other:
Cost of products sold	6,686,226	6,854,934	20,183,246	20,588,294
Marketing, administrative and other expenses	244,657	385,768	883,132	1,229,051
Equity in (earnings) losses of unconsolidated affiliates	(5,278)	1,083	(24,079)	(3,671)
Losses and impairments of assets	123,000		137,150
Interest expense (income), net	7,282	(14,133)	(32,811)	648
Costs, expenses and other, total	7,055,887	7,227,652	21,146,638	21,814,322
Earnings before income taxes and noncontrolling interests	388,273	1,548,082	2,511,777	5,194,648
Provision for income taxes	85,448	326,827	537,847	1,154,689
Net earnings before noncontrolling interests	302,825	1,221,255	1,973,930	4,039,959
Earnings attributable to noncontrolling interests	52,915	79,749	233,962	300,557
Net earnings attributable to Nucor stockholders	$ 249,910	$ 1,141,506	$ 1,739,968	$ 3,739,402
Net earnings per share:
Basic	$ 1.05	$ 4.58	$ 7.23	$ 14.86
Diluted	$ 1.05	$ 4.57	$ 7.22	$ 14.83
Average shares outstanding:
Basic	236,462	248,504	239,701	250,752
Diluted	236,768	248,916	239,800	251,179

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 28, 2024		Sep. 30, 2023		Sep. 28, 2024		Sep. 30, 2023
Statement Of Comprehensive Income [Abstract]
Net earnings before noncontrolling interests	$ 302,825		$ 1,221,255		$ 1,973,930		$ 4,039,959
Other comprehensive income (loss):
Net unrealized (loss) income on hedging derivatives, net of income taxes of $(1,900) and $(1,500) for the third quarter of 2024 and 2023, respectively, and $(3,600) and $(10,700) for the first nine months of 2024 and 2023, respectively	(6,055)		(4,779)		(11,171)		(33,782)
Reclassification adjustment for settlement of hedging derivatives included in net earnings, net of income taxes of $1,800 and $1,100 for the third quarter of 2024 and 2023, respectively, and $6,000 and $3,100 for the first nine months of 2024 and 2023, respectively	5,955	[1]	3,579	[2]	18,771	[1]	9,982	[2]
Foreign currency translation gain (loss), net of income taxes of $0 for the third quarter and first nine months of 2024 and 2023	9,505		(18,655)		(13,761)		12,490
Net current-period other comprehensive income (loss)	9,405		(19,855)		(6,161)		(11,310)
Comprehensive income	312,230		1,201,400		1,967,769		4,028,649
Comprehensive income attributable to noncontrolling interests	52,915		79,749		233,962		300,557
Comprehensive income attributable to Nucor stockholders	$ 259,315		$ 1,121,651		$ 1,733,807		$ 3,728,092
[1] Includes $ 5,955 and $ 18,771 net-of-tax impact of accumulated other comprehensive income (loss) reclassifications into cost of products sold for net losses on commodity contracts in the third quarter and first nine months of 2024 , respectively. The tax impact of those reclassifications was $ 1,800 and $ 6,000 in the third quarter and first nine months of 2024 , respectively. Includes $ 3,579 and $ 9,982 net-of-tax impact of accumulated other comprehensive income (loss) reclassifications into cost of products sold for net losses on commodity contracts in the third quarter and first nine months of 2023 , respectively. The tax impact of those reclassifications was $ 1,100 and $ 3,100 in the third quarter and first nine months of 2023 , respectively.

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Statement Of Comprehensive Income [Abstract]
Net unrealized (loss) income on hedging derivatives, tax	$ (1,900)	$ (1,500)	$ (3,600)	$ (10,700)
Reclassification adjustment for settlement of hedging derivatives included in net income, tax effect	1,800	1,100	6,000	3,100
Foreign currency translation gain (loss), tax	$ 0	$ 0	$ 0	$ 0

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 28, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 4,262,799	$ 6,383,298
Short-term investments	595,650	747,479
Accounts receivable, net	2,949,190	2,953,311
Inventories, net	5,126,493	5,577,758
Other current assets	587,085	724,012
Total current assets	13,521,217	16,385,858
Property, plant and equipment, net	12,580,243	11,049,767
Restricted cash and cash equivalents		3,494
Goodwill	4,273,610	3,968,847
Other intangible assets, net	3,194,261	3,108,015
Other assets	776,860	824,518
Total assets	34,346,191	35,340,499
Current liabilities:
Short-term debt	213,751	119,211
Current portion of long-term debt and finance lease obligations	1,040,380	74,102
Accounts payable	1,902,927	2,020,289
Salaries, wages and related accruals	974,568	1,326,390
Accrued expenses and other current liabilities	1,085,160	1,054,517
Total current liabilities	5,216,786	4,594,509
Long-term debt and finance lease obligations due after one year	5,684,936	6,648,873
Deferred credits and other liabilities	1,887,928	1,973,363
Total liabilities	12,789,650	13,216,745
Commitments and contingencies
Nucor stockholders' equity:
Common stock	152,061	152,061
Additional paid-in capital	2,207,928	2,176,243
Retained earnings	30,113,666	28,762,045
Accumulated other comprehensive loss, net of income taxes	(168,233)	(162,072)
Treasury stock	(11,832,564)	(9,987,643)
Total Nucor stockholders' equity	20,472,858	20,940,634
Noncontrolling interests	1,083,683	1,183,120
Total equity	21,556,541	22,123,754
Total liabilities and equity	$ 34,346,191	$ 35,340,499

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023
Operating activities:
Net earnings before noncontrolling interests	$ 1,973,930	$ 4,039,959
Adjustments:
Depreciation	808,791	681,153
Amortization	189,146	175,701
Loss on assets	137,150
Stock-based compensation	114,280	101,107
Deferred income taxes	(92,468)	(25,750)
Distributions from affiliates	7,997	18,621
Equity in earnings of unconsolidated affiliates	(24,079)	(3,671)
Changes in assets and liabilities (exclusive of acquisitions and dispositions):
Accounts receivable	46,823	171,621
Inventories	496,048	209,056
Accounts payable	(206,730)	164,479
Federal income taxes	16,535	240,667
Salaries, wages and related accruals	(313,770)	(347,026)
Other operating activities	91,979	165,692
Cash provided by operating activities	3,245,632	5,591,609
Investing activities:
Capital expenditures	(2,293,859)	(1,496,248)
Investment in and advances to affiliates	(79)	(35,106)
Sale of business	1,438
Disposition of plant and equipment	11,834	8,617
Acquisitions (net of cash acquired)	(672,193)
Purchases of investments	(1,036,908)	(1,200,136)
Proceeds from the sale of investments	1,209,944	917,332
Other investing activities	9,607	(35,001)
Cash used in investing activities	(2,770,216)	(1,840,542)
Financing activities:
Net change in short-term debt	94,540	(13,142)
Repayment of long-term debt	(5,000)	(7,500)
Proceeds from exercise of stock options	3,357	10,350
Payment of tax withholdings on certain stock-based compensation	(50,213)	(44,456)
Distributions to noncontrolling interests	(333,399)	(412,404)
Cash dividends	(393,837)	(387,996)
Acquisition of treasury stock	(1,901,574)	(1,376,757)
Other financing activities	(10,724)	(12,437)
Cash used in financing activities	(2,596,850)	(2,244,342)
Effect of exchange rate changes on cash	(2,559)	837
(Decrease) Increase in cash and cash equivalents and restricted cash and cash equivalents	(2,123,993)	1,507,562
Cash and cash equivalents and restricted cash and cash equivalents - beginning of year	6,386,792	4,361,220
Cash and cash equivalents and restricted cash and cash equivalents - end of nine months	4,262,799	5,868,782
Non-cash investing activity:
Change in accrued plant and equipment purchases	$ 70,077	$ 40,126

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Pay vs Performance Disclosure
Net Income (Loss)	$ 249,910	$ 1,141,506	$ 1,739,968	$ 3,739,402

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Sep. 28, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false
Rule 10b5-1 Arrangement Modified	false
Non-Rule 10b5-1 Arrangement Modified	false

Basis of Interim Presentation

Basis of Interim Presentation	9 Months Ended
	Sep. 28, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Interim Presentation	1. Basis of Interim Presentation The information furnished in this Item 1 reflects all adjustments which are, in the opinion of management, necessary to make a fair statement of the results for the interim periods presented and are of a normal and recurring nature unless otherwise noted. The information furnished has not been audited; however, the December 31, 2023 condensed consolidated balance sheet data was derived from audited financial statements but does not include all disclosures required by accounting principles generally accepted in the United States of America. The unaudited condensed consolidated financial statements included in this Item 1 should be read in conjunction with the audited consolidated financial statements and the notes thereto included in Nucor’s Annual Report on Form 10-K for the year ended December 31, 2023. Recent Accounting Pronouncements In November 2023, new accounting guidance was issued that updates reportable segment disclosure requirements by requiring disclosures of significant reportable segment expenses that are regularly provided to the Chief Operating Decision Maker (the “CODM”) and included within each reported measure of a segment's profit or loss. This new guidance also requires disclosure of the title and position of the individual identified as the CODM and an explanation of how the CODM uses the reported measures of a segment’s profit or loss in assessing segment performance and deciding how to allocate resources. The new guidance is effective for annual periods beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. The new guidance is required to be applied retrospectively to all prior periods presented in the financial statements. Early adoption is also permitted. This new guidance will likely result in additional required disclosures when adopted. The Company is evaluating the impact that the adoption of this new guidance will have on its consolidated financial statements. In December 2023, new accounting guidance was issued related to income tax disclosures. The new guidance requires disaggregated information about a reporting entity’s effective tax rate reconciliation as well as additional information on income taxes paid. The new guidance is effective on a prospective basis for annual periods beginning after December 15, 2024. Early adoption is also permitted for annual financial statements that have not yet been issued or made available for issuance. This new guidance will likely result in additional required disclosures when adopted. The Company is evaluating the impact that the adoption of this new guidance will have on its consolidated financial statements.

Inventories

Inventories	9 Months Ended
	Sep. 28, 2024
Inventory Disclosure [Abstract]
Inventories	2. Inventories Inventories consisted of approximately 34 % raw materials and supplies and 66 % finished and semi-finished products at September 28, 2024 (approximately 37 % and 63 %, respectively, at December 31, 2023 ). Nucor’s manufacturing process consists of a continuous, vertically integrated process from which products are sold to customers at various stages throughout the process. Since most steel products can be classified as either finished or semi-finished products, these two categories of inventory are combined.

Property, Plant and Equipment

Property, Plant and Equipment	9 Months Ended
	Sep. 28, 2024
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	3. Property, Plant and Equipment Property, plant and equipment is recorded net of accumulated depreciation of $ 12.50 billion at September 28, 2024 ($ 11.79 billion at December 31, 2023). Included within property, plant and equipment, net, of the steel mills segment at September 28, 2024 is $ 241.6 million of assets, net of accumulated depreciation, related to our joint venture Nucor-JFE Steel Mexico, S. de R.L. de C.V. (“NJSM”). If NJSM’s financial performance continues to underperform its forecasts, management may determine that a triggering event has occurred and will perform an impairment assessment to determine if the carrying amount of NJSM’s property, plant and equipment, net, exceeds its projected undiscounted cash flows. A future assessment may result in the impairment of part or all of the carrying value of NJSM’s property, plant and equipment, net.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	9 Months Ended
	Sep. 28, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	4. Goodwill and Other Intangible Assets The change in the net carrying amount of goodwill for the nine months ended September 28, 2024 by segment was as follows (in thousands): Steel Mills Steel Products Raw Materials Total Balance at December 31, 2023 $ 675,186 $ 2,514,172 $ 779,489 $ 3,968,847 Acquisitions - 316,790 ( 8,166 ) 308,624 Translation/Other - ( 3,861 ) - ( 3,861 ) Balance at September 28, 2024 $ 675,186 $ 2,827,101 $ 771,323 $ 4,273,610 Nucor completed its most recent annual goodwill impairment testing as of the first day of the fourth quarter of 2023 and concluded that as of such date there was no impairment of goodwill for any of its reporting units. Intangible assets with estimated useful lives of five to 25 years are amortized on a straight-line or accelerated basis and consisted of the following as of September 28, 2024 and December 31, 2023 (in thousands): September 28, 2024 December 31, 2023 Gross Amount Accumulated Gross Amount Accumulated Customer relationships $ 4,431,078 $ 1,455,570 $ 4,190,156 $ 1,295,778 Trademarks and trade names 387,219 186,217 372,153 168,363 Other 129,151 111,400 109,747 99,900 $ 4,947,448 $ 1,753,187 $ 4,672,056 $ 1,564,041 Intangible asset amortization expense in the third quarter of 2024 and 2023 was $ 69.3 million and $ 58.5 million, respectively, and $ 189.1 million and $ 175.7 million in the first nine months of 2024 and 2023, respectively. Annual amortization expense is estimated to be $ 264.1 million in 2024 ; $ 252.8 million in 2025; $ 248.2 million in 2026; $ 244.8 million in 2027; and $ 238.4 million in 2028.

Current Liabilities

Current Liabilities	9 Months Ended
	Sep. 28, 2024
Payables and Accruals [Abstract]
Current Liabilities	5. Current Liabilities Book overdrafts, included in accounts payable in the condensed consolidated balance sheets, were $ 153.2 million at September 28, 2024 ($ 159.0 million at December 31, 2023 ). Dividends payable, included in accrued expenses and other current liabilities in the condensed consolidated balance sheets, were $ 128.1 million at September 28, 2024 ($ 133.6 million at December 31, 2023 ).

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 28, 2024
Fair Value Disclosures [Abstract]
Fair Value Measurements	6. Fair Value Measurements The following table summarizes information regarding Nucor’s financial assets and financial liabilities that were measured at fair value as of September 28, 2024 and December 31, 2023 (in thousands). Nucor does not have any non-financial assets or non-financial liabilities that are measured at fair value on a recurring basis. Fair Value Measurements at Reporting Date Using Description Carrying Quoted Prices Significant Significant As of September 28, 2024 Assets: Cash equivalents $ 3,595,175 $ 3,595,175 $ - $ - Short-term investments 595,650 595,650 - - Derivative contracts 300 - 300 - Other assets 57,904 18,825 - 39,079 Total assets $ 4,249,029 $ 4,209,650 $ 300 $ 39,079 Liabilities: Derivative contracts $ ( 15,198 ) $ - $ ( 15,198 ) $ - As of December 31, 2023 Assets: Cash equivalents $ 5,724,549 $ 5,724,549 $ - $ - Short-term investments 747,479 747,479 - - Restricted cash and cash equivalents 3,494 3,494 - - Derivative contracts - - - - Other assets 47,020 4,245 - 42,775 Total assets $ 6,522,542 $ 6,479,767 $ - $ 42,775 Liabilities: Derivative contracts $ ( 23,211 ) $ - $ ( 23,211 ) $ - Fair value measurements for Nucor’s cash equivalents, short-term investments and restricted cash and cash equivalents and an investment in a publicly traded nuclear power equipment manufacturer are classified under Level 1 because such measurements are based on quoted market prices in active markets for identical assets. Fair value measurements for Nucor’s derivatives, which are typically commodity or foreign exchange contracts, are classified under Level 2 because such measurements are based on published market prices for similar assets or are estimated based on observable inputs such as interest rates, yield curves, credit risks, spot and future commodity prices, and spot and future exchange rates. Fair value measurements for Nucor's investments in privately held companies, most of which are in a nuclear fusion technology company, are classified under Level 3 because such measurements are based on unobservable inputs that indicate a change in fair value, including the transaction price in the event of a change in ownership of the investee (e.g., the sale of other investors' interest in the company) or the transaction price in the event of additional equity issuances of the investee. There were no transfers between levels in the fair value hierarchy for the periods presented. The fair value of short-term and long-term debt, including current maturities, was approximately $ 6.38 billion at September 28, 2024 (approximately $ 6.22 billion at December 31, 2023). The debt fair value estimates are classified under Level 2 because such estimates are based on readily available market prices of our debt at September 28, 2024 and December 31, 2023 , or similar debt with the same maturities, ratings and interest rates.

Contingencies

Contingencies	9 Months Ended
	Sep. 28, 2024
Commitments and Contingencies Disclosure [Abstract]
Contingencies	7. Contingencies We are from time to time a party to various lawsuits, claims and other legal proceedings that arise in the ordinary course of business. With respect to all such lawsuits, claims and proceedings, we record reserves when it is probable a liability has been incurred and the amount of loss can be reasonably estimated. We do not believe that any of these proceedings, individually or in the aggregate, would be expected to have a material adverse effect on our results of operations, financial position or cash flows. Nucor maintains liability insurance with self-insurance limits for certain risks.

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 28, 2024
Share-Based Payment Arrangement [Abstract]
Stock-Based Compensation	8. Stock-Based Compensation Stock Options A summary of activity under Nucor’s stock option plans for the first nine months of 2024 is as follows (shares and aggregate intrinsic value in thousands): Weighted- Weighted- Average Average Aggregate Exercise Remaining Intrinsic Shares Price Contractual Life Value Number of shares under stock options: Outstanding at beginning of year 718 $ 78.33 Granted 73 $ 168.85 Exercised ( 58 ) $ 49.94 $ 8,211 Canceled ( 3 ) $ 168.85 Outstanding at September 28, 2024 730 $ 89.25 6.8 years $ 45,774 Stock options exercisable at September 28, 2024 497 $ 64.24 5.9 years $ 42,722 Co mpensation expense for stock options was $ 0.3 million and $ 0.4 million in the third quarter of 2024 and 2023 , respectively, and $ 4.3 million in the first nine months of each of 2024 and 2023. As of September 28, 2024 , unrecognized compensation expense related to stock options was $ 2.4 million, which we expect to recognize over a weighted-average period of 2.1 years. Restricted Stock Units A summary of Nucor’s restricted stock unit (“RSU”) activity for the first nine months of 2024 is as follows (shares in thousands): Shares Grant Date Restricted stock units: Unvested at beginning of year 947 $ 124.89 Granted 749 $ 168.85 Vested ( 632 ) $ 143.23 Canceled ( 19 ) $ 149.35 Unvested at September 28, 2024 1,045 $ 144.87 Compensation expense for RSUs was $ 20.2 million and $ 14.0 million in the third quarter of 2024 and 2023 , respectively, and $ 87.0 million and $ 74.7 million in the first nine months of 2024 and 2023, respectively. As of September 28, 2024 , unrecognized compensation expense related to unvested RSUs was $ 120.7 million, which we expect to recognize over a weighted-average period of 1.3 years. Restricted Stock Awards A summary of Nucor’s restricted stock activity under the Nucor Corporation Senior Officers Annual Incentive Plan (a supplement to the Nucor Corporation 2014 Omnibus Incentive Compensation Plan, the “AIP”) and the Nucor Corporation Senior Officers Long-Term Incentive Plan (a supplement to the Nucor Corporation 2014 Omnibus Incentive Compensation Plan, the “LTIP”) for the first nine months of 2024 is as follows (shares in thousands): Grant Date Shares Fair Value Restricted stock units and restricted stock awards: Unvested at beginning of year 210 $ 145.55 Granted 421 $ 187.54 Vested ( 367 ) $ 176.43 Canceled - $ - Unvested at September 28, 2024 264 $ 169.52 Compensation expense for common stock and common stock units awarded under the AIP and the LTIP is recorded over the performance measurement and vesting periods based on the anticipated number and market value of shares of common stock and common stock units to be awarded. Compensation expense for anticipated awards based upon Nucor’s financial performance, exclusive of amounts payable in cash, was $ 4.0 million and $ 3.1 million in the third quarter of 2024 and 2023 , respectively, and $ 22.9 million and $ 22.5 million in the first nine months of 2024 and 2023, respectively. As of September 28, 2024 , unrecognized compensation expense related to unvested restricted stock awards was $ 12.1 million, which we expect to recognize over a weighted-average period of 1.8 years.

Employee Benefit Plan

Employee Benefit Plan	9 Months Ended
	Sep. 28, 2024
Retirement Benefits [Abstract]
Employee Benefit Plan	9. Employee Benefit Plan Nucor makes contributions to a Profit Sharing and Retirement Savings Plan for qualified employees based on the profitability of the Company. Nucor’s expense for these benefits totaled $ 39.3 m illion and $ 148.6 million in the third quarter of 2024 and 2023, respectively, and $ 250.9 million and $ 505.2 million in the first nine months of 2024 and 2023 , respectively. The related liability for these benefits is included in salaries, wages and related accruals in the condensed consolidated balance sheets.

Interest Expense (Income)

Interest Expense (Income)	9 Months Ended
	Sep. 28, 2024
Banking and Thrift, Interest [Abstract]
Interest Expense (Income)	10. Interest Expense (Income) The components of net interest expense (income) for the third quarter and first nine months of 2024 and 2023 are as follows (in thousands): Three Months (13 Weeks) Ended Nine Months (39 Weeks) Ended September 28, 2024 September 30, 2023 September 28, 2024 September 30, 2023 Interest expense $ 65,376 $ 63,228 $ 175,715 $ 186,716 Interest income ( 58,094 ) ( 77,361 ) ( 208,526 ) ( 186,068 ) Interest expense (income), net $ 7,282 $ ( 14,133 ) $ ( 32,811 ) $ 648

Income Taxes

Income Taxes	9 Months Ended
	Sep. 28, 2024
Income Tax Disclosure [Abstract]
Income Taxes	11. Income Taxes The effective tax rate for the third quarter of 2024 was 22.0 % compared to 21.1 % for the third quarter of 2023. The Internal Revenue Service (the “IRS”) is currently examining Nucor’s 2015, 2019, and 2020 federal income tax returns. Nucor has concluded U.S. federal income tax matters for the tax years through 2014, and for the tax years 2016 through 2018. The tax years 2021 through 2023 remain open to examination by the IRS. The 2015 through 2021 Canadian income tax returns for Nucor Rebar Fabrication Group Inc. (formerly known as Harris Steel Group Inc.) and certain related affiliates are currently under examination by the Canada Revenue Agency. The tax years 2016 through 2023 remain open to examination by other major taxing jurisdictions to which Nucor is subject (primarily Canada, Trinidad & Tobago, and other state and local jurisdictions). Non-current deferred tax assets included in other assets in the condensed consolidated balance sheets were $ 34.0 million at September 28, 2024 ($ 40.7 million at December 31, 2023). Non-current deferred tax liabilities included in deferred credits and other liabilities in the condensed consolidated balance sheets were $ 1.25 billion at September 28, 2024 ($ 1.33 billion at December 31, 2023).

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 28, 2024
Equity [Abstract]
Stockholders' Equity	12. Stockholders’ Equity The following tables reflect the changes in stockholders’ equity attributable to Nucor and the noncontrolling interests of Nucor’s joint ventures, Nucor-Yamato Steel Company (Limited Partnership) (“NYS”), California Steel Industries, Inc. (“CSI”) and NJSM - in each of which Nucor owns 51 % (the third of which Nucor acquired an additional 1 % interest in the fourth quarter of 2023, bringing its total equity ownership to a 51 % controlling interest), for the three months and nine months ended September 28, 2024 and September 30, 2023 (in thousands): Three Months (13 Weeks) Ended September 28, 2024 Accumulated Total Additional Other Treasury Stock Nucor Common Stock Paid-in Retained Comprehensive (at cost) Stockholders' Noncontrolling Total Shares Amount Capital Earnings Income (Loss) Shares Amount Equity Interests BALANCES, June 29, 2024 $ 21,772,508 380,154 $ 152,061 $ 2,189,371 $ 29,991,834 $ ( 177,638 ) 142,816 $ ( 11,432,103 ) $ 20,723,525 $ 1,048,983 Net earnings before noncontrolling interests 302,825 - - - 249,910 - - - 249,910 52,915 Other comprehensive income (loss) 9,405 - - - - 9,405 - - 9,405 - Stock options exercised - - - - - - - - - - Stock option expense 346 - - 346 - - - - 346 - Issuance of stock under award plans, 18,575 - - 15,627 - - ( 40 ) 2,948 18,575 - Amortization of unearned 2,584 - - 2,584 - - - - 2,584 - Treasury stock acquired and net impact of excise tax ( 403,409 ) - - - - - 2,565 ( 403,409 ) ( 403,409 ) - Cash dividends declared ( 128,078 ) - - - ( 128,078 ) - - - ( 128,078 ) - Distributions to noncontrolling ( 18,215 ) - - - - - - - - ( 18,215 ) BALANCES, September 28, 2024 $ 21,556,541 380,154 $ 152,061 $ 2,207,928 $ 30,113,666 $ ( 168,233 ) 145,341 $ ( 11,832,564 ) $ 20,472,858 $ 1,083,683 Nine Months (39 Weeks) Ended September 28, 2024 Accumulated Total Additional Other Treasury Stock Nucor Common Stock Paid-in Retained Comprehensive (at cost) Stockholders' Noncontrolling Total Shares Amount Capital Earnings Income (Loss) Shares Amount Equity Interests BALANCES, December 31, 2023 $ 22,123,754 380,154 $ 152,061 $ 2,176,243 $ 28,762,045 $ ( 162,072 ) 135,252 $ ( 9,987,643 ) $ 20,940,634 $ 1,183,120 Net earnings before noncontrolling interests 1,973,930 - - - 1,739,968 - - - 1,739,968 233,962 Other comprehensive income (loss) ( 6,161 ) - - - - ( 6,161 ) - - ( 6,161 ) - Stock options exercised 2,880 - - ( 1,570 ) - - ( 58 ) 4,450 2,880 - Stock option expense 4,364 - - 4,364 - - - - 4,364 - Issuance of stock under award plans, 90,865 - - 21,207 - - ( 886 ) 69,658 90,865 - Amortization of unearned 7,684 - - 7,684 - - - - 7,684 - Treasury stock acquired and net impact of excise tax ( 1,919,029 ) - - - - - 11,033 ( 1,919,029 ) ( 1,919,029 ) - Cash dividends declared ( 388,347 ) - - - ( 388,347 ) - - - ( 388,347 ) - Distributions to noncontrolling ( 333,399 ) - - - - - - - - ( 333,399 ) BALANCES, September 28, 2024 $ 21,556,541 380,154 $ 152,061 $ 2,207,928 $ 30,113,666 $ ( 168,233 ) 145,341 $ ( 11,832,564 ) $ 20,472,858 $ 1,083,683 Three Months (13 Weeks) Ended September 30, 2023 Accumulated Total Additional Other Treasury Stock Nucor Common Stock Paid-in Retained Comprehensive (at cost) Stockholders' Noncontrolling Total Shares Amount Capital Earnings Income (Loss) Shares Amount Equity Interests BALANCES, July 1, 2023 $ 20,940,928 380,154 $ 152,061 $ 2,149,693 $ 27,095,661 $ ( 128,972 ) 131,431 $ ( 9,314,764 ) $ 19,953,679 $ 987,249 Net earnings before noncontrolling interests 1,221,255 - - - 1,141,506 - - - 1,141,506 79,749 Other comprehensive income (loss) ( 19,855 ) - - - - ( 19,855 ) - - ( 19,855 ) - Stock options exercised 3,227 - - ( 386 ) - - ( 50 ) 3,613 3,227 - Stock option expense 392 - - 392 - - - - 392 - - Issuance of stock under award plans, 16,353 - - 14,337 - - ( 28 ) 2,016 16,353 - Amortization of unearned 1,599 - - 1,599 - - - - 1,599 - Treasury stock acquired and net impact of excise tax ( 504,242 ) - - - - - 2,962 ( 504,242 ) ( 504,242 ) - Cash dividends declared ( 126,942 ) - - - ( 126,942 ) - - - ( 126,942 ) - Distributions to noncontrolling ( 23,633 ) - - - - - - - - ( 23,633 ) BALANCES, September 30, 2023 $ 21,509,082 380,154 $ 152,061 $ 2,165,635 $ 28,110,225 $ ( 148,827 ) 134,315 $ ( 9,813,377 ) $ 20,465,717 $ 1,043,365 Nine Months (39 Weeks) Ended September 30, 2023 Accumulated Total Additional Other Treasury Stock Nucor Common Stock Paid-in Retained Comprehensive (at cost) Stockholders' Noncontrolling Total Shares Amount Capital Earnings Income (Loss) Shares Amount Equity Interests BALANCES, December 31, 2022 $ 19,569,906 380,154 $ 152,061 $ 2,143,520 $ 24,754,873 $ ( 137,517 ) 126,661 $ ( 8,498,243 ) $ 18,414,694 $ 1,155,212 Net earnings before noncontrolling interests 4,039,959 - - - 3,739,402 - - - 3,739,402 300,557 Other comprehensive income (loss) ( 11,310 ) - - - - ( 11,310 ) - - ( 11,310 ) - Stock options exercised 10,350 - - ( 2,135 ) - - ( 181 ) 12,485 10,350 - Stock option expense 4,314 - - 4,314 - - - - 4,314 - Issuance of stock under award plans, 76,322 - - 15,072 - - ( 917 ) 61,250 76,322 - Amortization of unearned 4,864 - - 4,864 - - - - 4,864 - Treasury stock acquired and net impact of excise tax ( 1,388,869 ) - - - - - 8,752 ( 1,388,869 ) ( 1,388,869 ) - Cash dividends declared ( 384,050 ) - - - ( 384,050 ) - - - ( 384,050 ) - Distributions to noncontrolling ( 412,404 ) - - - - - - - - ( 412,404 ) BALANCES, September 30, 2023 $ 21,509,082 380,154 $ 152,061 $ 2,165,635 $ 28,110,225 $ ( 148,827 ) 134,315 $ ( 9,813,377 ) $ 20,465,717 $ 1,043,365 Dividends declared per share were $ 0.54 per share in the third quarter of 2024 ($ 0.51 per share in the third quarter of 2023 ) and $ 1.62 per share in the first nine months of 2024 ($ 1.53 per share in the first nine months of 2023). On May 11, 2023, the Company announced that its Board of Directors had approved a share repurchase program under which the Company is authorized to repurchase up to $ 4.00 billion of the Company’s common stock and terminated all previously authorized share repurchase programs. Share repurchases are made from time to time in the open market at prevailing market prices or through private transactions or block trades. The timing and amount of repurchases will depend on market conditions, share price, applicable legal requirements and other factors. The share repurchase authorization is discretionary and has no expiration date. As of September 28, 2024 , the Company had approximately $ 1.42 billion available for share repurchases under the program authorized by the Company’s Board of Directors.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 28, 2024
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	13. Accumulated Other Comprehensive Income (Loss) The following tables reflect the changes in accumulated other comprehensive income (loss) by component for the three months and nine months ended September 28, 2024 and September 30, 2023 (in thousands): Three-Month (13-Week) Period Ended September 28, 2024 Gains and (Losses) on Foreign Currency Adjustment to Early Hedging Derivatives Gains (Losses) Retiree Medical Plan Total Accumulated other comprehensive $ ( 6,200 ) $ ( 182,441 ) $ 11,003 $ ( 177,638 ) Other comprehensive income ( 6,055 ) 9,505 - 3,450 Amounts reclassified from (1) 5,955 - - 5,955 Net current-period other ( 100 ) 9,505 - 9,405 Accumulated other comprehensive $ ( 6,300 ) $ ( 172,936 ) $ 11,003 $ ( 168,233 ) Nine-Month (39-Week) Period Ended September 28, 2024 Gains and (Losses) on Foreign Currency Adjustment to Early Hedging Derivatives Gains (Losses) Retiree Medical Plan Total Accumulated other comprehensive $ ( 13,900 ) $ ( 159,175 ) $ 11,003 $ ( 162,072 ) Other comprehensive income ( 11,171 ) ( 13,761 ) - ( 24,932 ) Amounts reclassified from (1) 18,771 - - 18,771 Net current-period other 7,600 ( 13,761 ) - ( 6,161 ) Accumulated other comprehensive $ ( 6,300 ) $ ( 172,936 ) $ 11,003 $ ( 168,233 ) (1) Includes $ 5,955 and $ 18,771 net-of-tax impact of accumulated other comprehensive income (loss) reclassifications into cost of products sold for net losses on commodity contracts in the third quarter and first nine months of 2024 , respectively. The tax impact of those reclassifications was $ 1,800 and $ 6,000 in the third quarter and first nine months of 2024 , respectively. Three-Month (13-Week) Period Ended September 30, 2023 Gains and (Losses) on Foreign Currency Adjustment to Early Hedging Derivatives Gains (Losses) Retiree Medical Plan Total Accumulated other comprehensive $ 3,500 $ ( 149,071 ) $ 16,599 $ ( 128,972 ) Other comprehensive income (loss) ( 4,779 ) ( 18,655 ) - ( 23,434 ) Amounts reclassified from (2) 3,579 - - 3,579 Net current-period other ( 1,200 ) ( 18,655 ) - ( 19,855 ) Accumulated other comprehensive $ 2,300 $ ( 167,726 ) $ 16,599 $ ( 148,827 ) Nine-Month (39-Week) Period Ended September 30, 2023 Gains and (Losses) on Foreign Currency Adjustment to Early Hedging Derivatives Gains (Losses) Retiree Medical Plan Total Accumulated other comprehensive $ 26,100 $ ( 180,216 ) $ 16,599 $ ( 137,517 ) Other comprehensive income (loss) ( 33,782 ) 12,490 - ( 21,292 ) Amounts reclassified from (2) 9,982 - - 9,982 Net current-period other ( 23,800 ) 12,490 - ( 11,310 ) Accumulated other comprehensive $ 2,300 $ ( 167,726 ) $ 16,599 $ ( 148,827 ) (2) Includes $ 3,579 and $ 9,982 net-of-tax impact of accumulated other comprehensive income (loss) reclassifications into cost of products sold for net losses on commodity contracts in the third quarter and first nine months of 2023 , respectively. The tax impact of those reclassifications was $ 1,100 and $ 3,100 in the third quarter and first nine months of 2023 , respectively.

Segments

Segments	9 Months Ended
	Sep. 28, 2024
Segment Reporting [Abstract]
Segments	14. Segments Nucor reports its results in the following segments: steel mills, steel products and raw materials. The steel mills segment includes carbon and alloy steel in sheet, bars, structural and plate; steel trading and rebar distribution businesses; and Nucor’s equity method investment in NuMit LLC (“NuMit”). The steel products segment includes steel joists and joist girders, steel deck, fabricated concrete reinforcing steel, cold finished steel, precision castings, steel fasteners, metal building systems, insulated metal panels, overhead doors, steel grating, tubular products, steel racking, piling products, wire and wire mesh, and utility towers and structures. The raw materials segment includes The David J. Joseph Company and its affiliates (“DJJ”), primarily a scrap broker and processor; Nu-Iron Unlimited and Nucor Steel Louisiana LLC (“Nucor Steel Louisiana”), two facilities that produce direct reduced iron (“DRI”) used by the steel mills; and our natural gas production operations. Corporate/eliminations include items such as net interest expense (income), charges and credits associated with changes in allowances to eliminate intercompany profit in inventory, profit sharing expense and stock-based compensation. Corporate assets primarily include cash and cash equivalents, short-term investments, restricted cash and cash equivalents, allowances to eliminate intercompany profit in inventory, deferred income tax assets, federal and state income taxes receivable and investments in and advances to affiliates. Nucor’s results by segment for the third quarter and first nine months of 2024 and 2023 were as follows (in thousands): Three Months (13 Weeks) Ended Nine Months (39 Weeks) Ended September 28, 2024 September 30, 2023 September 28, 2024 September 30, 2023 Net sales to external customers: Steel mills $ 4,459,509 $ 5,091,479 $ 14,486,492 $ 15,636,508 Steel products 2,496,160 3,235,969 7,715,804 9,954,828 Raw materials 488,491 448,286 1,456,119 1,417,634 $ 7,444,160 $ 8,775,734 $ 23,658,415 $ 27,008,970 Intercompany sales: Steel mills $ 983,070 $ 1,201,648 $ 3,405,794 $ 3,726,346 Steel products 124,159 132,481 416,628 333,099 Raw materials 2,743,191 2,894,079 8,602,394 9,653,600 Corporate/eliminations ( 3,850,420 ) ( 4,228,208 ) ( 12,424,816 ) ( 13,713,045 ) $ - $ - $ - $ - Earnings before income taxes and Steel mills $ 309,123 $ 882,614 $ 2,056,689 $ 3,124,549 Steel products 313,972 806,731 1,266,922 2,788,322 Raw materials ( 66,332 ) 71,367 ( 17,355 ) 267,918 Corporate/eliminations ( 168,490 ) ( 212,630 ) ( 794,479 ) ( 986,141 ) $ 388,273 $ 1,548,082 $ 2,511,777 $ 5,194,648 September 28, 2024 December 31, 2023 Segment assets: Steel mills $ 16,122,916 $ 15,407,266 Steel products 11,516,513 10,914,870 Raw materials 3,406,496 3,546,759 Corporate/eliminations 3,300,266 5,471,604 $ 34,346,191 $ 35,340,499

Revenue

Revenue	9 Months Ended
	Sep. 28, 2024
Revenue from Contract with Customer [Abstract]
Revenue	15. Revenue The following tables disaggregate our revenue by major source for the third quarter and first nine months of 2024 and 2023 (in thousands): Three Months (13 Weeks) Ended September 28, 2024 Nine Months (39 Weeks) Ended September 28, 2024 Steel Steel Raw Total Steel Steel Raw Total Sheet $ 2,196,380 $ - $ - $ 2,196,380 $ 7,302,649 $ - $ - $ 7,302,649 Bar 1,263,897 - - 1,263,897 3,960,110 - - 3,960,110 Structural 534,931 - - 534,931 1,704,945 - - 1,704,945 Plate 464,301 - - 464,301 1,518,788 - - 1,518,788 Tubular Products - 291,425 - 291,425 - 1,004,884 - 1,004,884 Rebar Fabrication - 487,093 - 487,093 - 1,361,759 - 1,361,759 Joist - 274,903 - 274,903 - 944,227 - 944,227 Deck - 242,356 - 242,356 - 770,423 - 770,423 Building Systems - 341,965 - 341,965 - 1,016,497 - 1,016,497 Other Steel Products - 858,418 - 858,418 - 2,618,014 - 2,618,014 Raw Materials - - 488,491 488,491 - - 1,456,119 1,456,119 $ 4,459,509 $ 2,496,160 $ 488,491 $ 7,444,160 $ 14,486,492 $ 7,715,804 $ 1,456,119 $ 23,658,415 Three Months (13 Weeks) Ended September 30, 2023 Nine Months (39 Weeks) Ended September 30, 2023 Steel Steel Raw Total Steel Steel Raw Total Sheet $ 2,351,705 $ - $ - $ 2,351,705 $ 7,100,216 $ - $ - $ 7,100,216 Bar 1,448,433 - - 1,448,433 4,646,285 - - 4,646,285 Structural 626,633 - - 626,633 1,846,892 - - 1,846,892 Plate 664,708 - - 664,708 2,043,115 - - 2,043,115 Tubular Products - 370,472 - 370,472 - 1,246,006 - 1,246,006 Rebar Fabrication - 604,684 - 604,684 - 1,718,615 - 1,718,615 Joist - 528,018 - 528,018 - 1,802,809 - 1,802,809 Deck - 411,352 - 411,352 - 1,370,570 - 1,370,570 Building Systems - 392,658 - 392,658 - 1,017,706 - 1,017,706 Other Steel Products - 928,785 - 928,785 - 2,799,122 - 2,799,122 Raw Materials - - 448,286 448,286 - - 1,417,634 1,417,634 $ 5,091,479 $ 3,235,969 $ 448,286 $ 8,775,734 $ 15,636,508 $ 9,954,828 $ 1,417,634 $ 27,008,970 Contract liabilities are primarily related to deferred revenue resulting from cash payments received in advance from customers to protect against credit risk. Contract liabilities totaled $ 207.6 million as of September 28, 2024 ($ 313.8 million as of December 31, 2023 ) and are included in accrued expenses and other current liabilities in the condensed consolidated balance sheets.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 28, 2024
Earnings Per Share [Abstract]
Earnings Per Share	16. Earnings Per Share The computations of basic and diluted net earnings per share for the third quarter and first nine months of 2024 and 2023 are as follows (in thousands, except per share amounts): Three Months (13 Weeks) Ended Nine Months (39 Weeks) Ended September 28, 2024 September 30, 2023 September 28, 2024 September 30, 2023 Basic net earnings per share: Basic net earnings $ 249,910 $ 1,141,506 $ 1,739,968 $ 3,739,402 Earnings allocated to participating securities ( 1,117 ) ( 4,501 ) ( 7,556 ) ( 13,788 ) Net earnings available to common $ 248,793 $ 1,137,005 $ 1,732,412 $ 3,725,614 Basic average shares outstanding 236,462 248,504 239,701 250,752 Basic net earnings per share $ 1.05 $ 4.58 $ 7.23 $ 14.86 Diluted net earnings per share: Diluted net earnings $ 249,910 $ 1,141,506 $ 1,739,968 $ 3,739,402 Earnings allocated to participating securities ( 1,117 ) ( 4,488 ) ( 7,546 ) ( 13,747 ) Net earnings available to common $ 248,793 $ 1,137,018 $ 1,732,422 $ 3,725,655 Diluted average shares outstanding: Basic average shares outstanding 236,462 248,504 239,701 250,752 Dilutive effect of stock options and other 306 412 99 427 236,768 248,916 239,800 251,179 Diluted net earnings per share $ 1.05 $ 4.57 $ 7.22 $ 14.83 The following stock options were excluded from the computation of diluted net earnings per share for the third quarter and first nine months of 2024 and 2023 because their effect would have been anti-dilutive (shares in thousands): Three Months (13 Weeks) Ended Nine Months (39 Weeks) Ended September 28, 2024 September 30, 2023 September 28, 2024 September 30, 2023 Anti-dilutive stock options: Weighted-average shares 70 - 23 - Weighted-average exercise price $ 168.85 $ - $ 168.85 $ -

Acquisitions

Acquisitions	9 Months Ended
	Sep. 28, 2024
Business Combinations [Abstract]
Acquisitions	17. Acquisitions Acquisition of Rytec Corporation On July 23, 2024, Nucor used cash on hand to acquire the assets of Rytec Corporation ("Rytec") for a purchase price, net of cash and debt acquired, of approximately $ 565 million. Rytec is a manufacturer and seller of high-performance overhead door s. Rytec produces spiral metal doors for warehouses, manufacturing facilities, auto dealerships, and parking garages, as well as durable fabric doors that are used in cold storage, manufacturing and clean room applications. We believe this acquisition will help Nucor and C.H.I. Overhead Doors, LLC continue to grow their sales to the commercial market. The Rytec financial results are included as part of the steel products segment (see Note 14) beginning on July 23, 2024, the date Nucor acquired Rytec. We allocated the purchase price for Rytec to its individual assets acquired and liabilities assumed. While the purchase price allocation is substantially complete, it is still preliminary and subject to change. The following table summarizes the fair values of the assets acquired and liabilities assumed of Rytec as of July 23, 2024, the date of acquisition (in thousands): Cash $ 1,263 Accounts receivable 34,812 Inventory 32,477 Other current assets 1,475 Property, plant and equipment 31,948 Goodwill 274,036 Other intangible assets 215,000 Other assets 58 Total assets acquired 591,069 Accounts payable 16,474 Salary, wages and related accruals 5,003 Other current liabilities 4,261 Total liabilities assumed 25,738 Net assets acquired $ 565,331 The following table summarizes the purchase price allocation to the identifiable intangible assets of Rytec as of July 23, 2024, the date of acquisition (in thousands, except years): Weighted- Average Life Customer relationships $ 185,000 15 years Trademarks and trade names 16,000 10 years Other intangibles 14,000 < 1 year $ 215,000 The goodwill of $ 274.0 million is calculated as the excess of the purchase price over the fair values of the assets acquired and liabilities assumed and has been allocated to the steel products segment (see Note 14). The goodwill is attributable to expected synergies within the steel products segment. Goodwill recognized for tax purposes was $ 274.0 million, all of which is deductible for tax purposes. Pro-forma results of operations for the Company would not be materially different as a result of the acquisition of Rytec and, therefore, this information is not presented.

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Sep. 28, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Change in Net Carrying Amount of Goodwill by Segment	The change in the net carrying amount of goodwill for the nine months ended September 28, 2024 by segment was as follows (in thousands): Steel Mills Steel Products Raw Materials Total Balance at December 31, 2023 $ 675,186 $ 2,514,172 $ 779,489 $ 3,968,847 Acquisitions - 316,790 ( 8,166 ) 308,624 Translation/Other - ( 3,861 ) - ( 3,861 ) Balance at September 28, 2024 $ 675,186 $ 2,827,101 $ 771,323 $ 4,273,610
Schedule of Intangible Assets	Intangible assets with estimated useful lives of five to 25 years are amortized on a straight-line or accelerated basis and consisted of the following as of September 28, 2024 and December 31, 2023 (in thousands): September 28, 2024 December 31, 2023 Gross Amount Accumulated Gross Amount Accumulated Customer relationships $ 4,431,078 $ 1,455,570 $ 4,190,156 $ 1,295,778 Trademarks and trade names 387,219 186,217 372,153 168,363 Other 129,151 111,400 109,747 99,900 $ 4,947,448 $ 1,753,187 $ 4,672,056 $ 1,564,041

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 28, 2024
Fair Value Disclosures [Abstract]
Schedule of Financial Assets and Liabilities Measured at Fair Value	The following table summarizes information regarding Nucor’s financial assets and financial liabilities that were measured at fair value as of September 28, 2024 and December 31, 2023 (in thousands). Nucor does not have any non-financial assets or non-financial liabilities that are measured at fair value on a recurring basis. Fair Value Measurements at Reporting Date Using Description Carrying Quoted Prices Significant Significant As of September 28, 2024 Assets: Cash equivalents $ 3,595,175 $ 3,595,175 $ - $ - Short-term investments 595,650 595,650 - - Derivative contracts 300 - 300 - Other assets 57,904 18,825 - 39,079 Total assets $ 4,249,029 $ 4,209,650 $ 300 $ 39,079 Liabilities: Derivative contracts $ ( 15,198 ) $ - $ ( 15,198 ) $ - As of December 31, 2023 Assets: Cash equivalents $ 5,724,549 $ 5,724,549 $ - $ - Short-term investments 747,479 747,479 - - Restricted cash and cash equivalents 3,494 3,494 - - Derivative contracts - - - - Other assets 47,020 4,245 - 42,775 Total assets $ 6,522,542 $ 6,479,767 $ - $ 42,775 Liabilities: Derivative contracts $ ( 23,211 ) $ - $ ( 23,211 ) $ -

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 28, 2024
Share-Based Payment Arrangement [Abstract]
Summary of Stock Option Plans Activity	A summary of activity under Nucor’s stock option plans for the first nine months of 2024 is as follows (shares and aggregate intrinsic value in thousands): Weighted- Weighted- Average Average Aggregate Exercise Remaining Intrinsic Shares Price Contractual Life Value Number of shares under stock options: Outstanding at beginning of year 718 $ 78.33 Granted 73 $ 168.85 Exercised ( 58 ) $ 49.94 $ 8,211 Canceled ( 3 ) $ 168.85 Outstanding at September 28, 2024 730 $ 89.25 6.8 years $ 45,774 Stock options exercisable at September 28, 2024 497 $ 64.24 5.9 years $ 42,722
Summary of Nucor's Restricted Stock Unit ("RSU") Activity	A summary of Nucor’s restricted stock unit (“RSU”) activity for the first nine months of 2024 is as follows (shares in thousands): Shares Grant Date Restricted stock units: Unvested at beginning of year 947 $ 124.89 Granted 749 $ 168.85 Vested ( 632 ) $ 143.23 Canceled ( 19 ) $ 149.35 Unvested at September 28, 2024 1,045 $ 144.87
Summary of Nucor's Restricted Stock Activity under AIP and LTIP	A summary of Nucor’s restricted stock activity under the Nucor Corporation Senior Officers Annual Incentive Plan (a supplement to the Nucor Corporation 2014 Omnibus Incentive Compensation Plan, the “AIP”) and the Nucor Corporation Senior Officers Long-Term Incentive Plan (a supplement to the Nucor Corporation 2014 Omnibus Incentive Compensation Plan, the “LTIP”) for the first nine months of 2024 is as follows (shares in thousands): Grant Date Shares Fair Value Restricted stock units and restricted stock awards: Unvested at beginning of year 210 $ 145.55 Granted 421 $ 187.54 Vested ( 367 ) $ 176.43 Canceled - $ - Unvested at September 28, 2024 264 $ 169.52

Interest Expense (Income) (Tabl

Interest Expense (Income) (Tables)	9 Months Ended
	Sep. 28, 2024
Banking and Thrift, Interest [Abstract]
Schedule of Components of Net Interest Expense (Income)	The components of net interest expense (income) for the third quarter and first nine months of 2024 and 2023 are as follows (in thousands): Three Months (13 Weeks) Ended Nine Months (39 Weeks) Ended September 28, 2024 September 30, 2023 September 28, 2024 September 30, 2023 Interest expense $ 65,376 $ 63,228 $ 175,715 $ 186,716 Interest income ( 58,094 ) ( 77,361 ) ( 208,526 ) ( 186,068 ) Interest expense (income), net $ 7,282 $ ( 14,133 ) $ ( 32,811 ) $ 648

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	9 Months Ended
	Sep. 28, 2024
Equity [Abstract]
Schedule Of Changes In Stock Holders Equity	The following tables reflect the changes in stockholders’ equity attributable to Nucor and the noncontrolling interests of Nucor’s joint ventures, Nucor-Yamato Steel Company (Limited Partnership) (“NYS”), California Steel Industries, Inc. (“CSI”) and NJSM - in each of which Nucor owns 51 % (the third of which Nucor acquired an additional 1 % interest in the fourth quarter of 2023, bringing its total equity ownership to a 51 % controlling interest), for the three months and nine months ended September 28, 2024 and September 30, 2023 (in thousands): Three Months (13 Weeks) Ended September 28, 2024 Accumulated Total Additional Other Treasury Stock Nucor Common Stock Paid-in Retained Comprehensive (at cost) Stockholders' Noncontrolling Total Shares Amount Capital Earnings Income (Loss) Shares Amount Equity Interests BALANCES, June 29, 2024 $ 21,772,508 380,154 $ 152,061 $ 2,189,371 $ 29,991,834 $ ( 177,638 ) 142,816 $ ( 11,432,103 ) $ 20,723,525 $ 1,048,983 Net earnings before noncontrolling interests 302,825 - - - 249,910 - - - 249,910 52,915 Other comprehensive income (loss) 9,405 - - - - 9,405 - - 9,405 - Stock options exercised - - - - - - - - - - Stock option expense 346 - - 346 - - - - 346 - Issuance of stock under award plans, 18,575 - - 15,627 - - ( 40 ) 2,948 18,575 - Amortization of unearned 2,584 - - 2,584 - - - - 2,584 - Treasury stock acquired and net impact of excise tax ( 403,409 ) - - - - - 2,565 ( 403,409 ) ( 403,409 ) - Cash dividends declared ( 128,078 ) - - - ( 128,078 ) - - - ( 128,078 ) - Distributions to noncontrolling ( 18,215 ) - - - - - - - - ( 18,215 ) BALANCES, September 28, 2024 $ 21,556,541 380,154 $ 152,061 $ 2,207,928 $ 30,113,666 $ ( 168,233 ) 145,341 $ ( 11,832,564 ) $ 20,472,858 $ 1,083,683 Nine Months (39 Weeks) Ended September 28, 2024 Accumulated Total Additional Other Treasury Stock Nucor Common Stock Paid-in Retained Comprehensive (at cost) Stockholders' Noncontrolling Total Shares Amount Capital Earnings Income (Loss) Shares Amount Equity Interests BALANCES, December 31, 2023 $ 22,123,754 380,154 $ 152,061 $ 2,176,243 $ 28,762,045 $ ( 162,072 ) 135,252 $ ( 9,987,643 ) $ 20,940,634 $ 1,183,120 Net earnings before noncontrolling interests 1,973,930 - - - 1,739,968 - - - 1,739,968 233,962 Other comprehensive income (loss) ( 6,161 ) - - - - ( 6,161 ) - - ( 6,161 ) - Stock options exercised 2,880 - - ( 1,570 ) - - ( 58 ) 4,450 2,880 - Stock option expense 4,364 - - 4,364 - - - - 4,364 - Issuance of stock under award plans, 90,865 - - 21,207 - - ( 886 ) 69,658 90,865 - Amortization of unearned 7,684 - - 7,684 - - - - 7,684 - Treasury stock acquired and net impact of excise tax ( 1,919,029 ) - - - - - 11,033 ( 1,919,029 ) ( 1,919,029 ) - Cash dividends declared ( 388,347 ) - - - ( 388,347 ) - - - ( 388,347 ) - Distributions to noncontrolling ( 333,399 ) - - - - - - - - ( 333,399 ) BALANCES, September 28, 2024 $ 21,556,541 380,154 $ 152,061 $ 2,207,928 $ 30,113,666 $ ( 168,233 ) 145,341 $ ( 11,832,564 ) $ 20,472,858 $ 1,083,683 Three Months (13 Weeks) Ended September 30, 2023 Accumulated Total Additional Other Treasury Stock Nucor Common Stock Paid-in Retained Comprehensive (at cost) Stockholders' Noncontrolling Total Shares Amount Capital Earnings Income (Loss) Shares Amount Equity Interests BALANCES, July 1, 2023 $ 20,940,928 380,154 $ 152,061 $ 2,149,693 $ 27,095,661 $ ( 128,972 ) 131,431 $ ( 9,314,764 ) $ 19,953,679 $ 987,249 Net earnings before noncontrolling interests 1,221,255 - - - 1,141,506 - - - 1,141,506 79,749 Other comprehensive income (loss) ( 19,855 ) - - - - ( 19,855 ) - - ( 19,855 ) - Stock options exercised 3,227 - - ( 386 ) - - ( 50 ) 3,613 3,227 - Stock option expense 392 - - 392 - - - - 392 - - Issuance of stock under award plans, 16,353 - - 14,337 - - ( 28 ) 2,016 16,353 - Amortization of unearned 1,599 - - 1,599 - - - - 1,599 - Treasury stock acquired and net impact of excise tax ( 504,242 ) - - - - - 2,962 ( 504,242 ) ( 504,242 ) - Cash dividends declared ( 126,942 ) - - - ( 126,942 ) - - - ( 126,942 ) - Distributions to noncontrolling ( 23,633 ) - - - - - - - - ( 23,633 ) BALANCES, September 30, 2023 $ 21,509,082 380,154 $ 152,061 $ 2,165,635 $ 28,110,225 $ ( 148,827 ) 134,315 $ ( 9,813,377 ) $ 20,465,717 $ 1,043,365 Nine Months (39 Weeks) Ended September 30, 2023 Accumulated Total Additional Other Treasury Stock Nucor Common Stock Paid-in Retained Comprehensive (at cost) Stockholders' Noncontrolling Total Shares Amount Capital Earnings Income (Loss) Shares Amount Equity Interests BALANCES, December 31, 2022 $ 19,569,906 380,154 $ 152,061 $ 2,143,520 $ 24,754,873 $ ( 137,517 ) 126,661 $ ( 8,498,243 ) $ 18,414,694 $ 1,155,212 Net earnings before noncontrolling interests 4,039,959 - - - 3,739,402 - - - 3,739,402 300,557 Other comprehensive income (loss) ( 11,310 ) - - - - ( 11,310 ) - - ( 11,310 ) - Stock options exercised 10,350 - - ( 2,135 ) - - ( 181 ) 12,485 10,350 - Stock option expense 4,314 - - 4,314 - - - - 4,314 - Issuance of stock under award plans, 76,322 - - 15,072 - - ( 917 ) 61,250 76,322 - Amortization of unearned 4,864 - - 4,864 - - - - 4,864 - Treasury stock acquired and net impact of excise tax ( 1,388,869 ) - - - - - 8,752 ( 1,388,869 ) ( 1,388,869 ) - Cash dividends declared ( 384,050 ) - - - ( 384,050 ) - - - ( 384,050 ) - Distributions to noncontrolling ( 412,404 ) - - - - - - - - ( 412,404 ) BALANCES, September 30, 2023 $ 21,509,082 380,154 $ 152,061 $ 2,165,635 $ 28,110,225 $ ( 148,827 ) 134,315 $ ( 9,813,377 ) $ 20,465,717 $ 1,043,365

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 28, 2024
Equity [Abstract]
Components of Accumulated Other Comprehensive Income (Loss)	The following tables reflect the changes in accumulated other comprehensive income (loss) by component for the three months and nine months ended September 28, 2024 and September 30, 2023 (in thousands): Three-Month (13-Week) Period Ended September 28, 2024 Gains and (Losses) on Foreign Currency Adjustment to Early Hedging Derivatives Gains (Losses) Retiree Medical Plan Total Accumulated other comprehensive $ ( 6,200 ) $ ( 182,441 ) $ 11,003 $ ( 177,638 ) Other comprehensive income ( 6,055 ) 9,505 - 3,450 Amounts reclassified from (1) 5,955 - - 5,955 Net current-period other ( 100 ) 9,505 - 9,405 Accumulated other comprehensive $ ( 6,300 ) $ ( 172,936 ) $ 11,003 $ ( 168,233 ) Nine-Month (39-Week) Period Ended September 28, 2024 Gains and (Losses) on Foreign Currency Adjustment to Early Hedging Derivatives Gains (Losses) Retiree Medical Plan Total Accumulated other comprehensive $ ( 13,900 ) $ ( 159,175 ) $ 11,003 $ ( 162,072 ) Other comprehensive income ( 11,171 ) ( 13,761 ) - ( 24,932 ) Amounts reclassified from (1) 18,771 - - 18,771 Net current-period other 7,600 ( 13,761 ) - ( 6,161 ) Accumulated other comprehensive $ ( 6,300 ) $ ( 172,936 ) $ 11,003 $ ( 168,233 ) (1) Includes $ 5,955 and $ 18,771 net-of-tax impact of accumulated other comprehensive income (loss) reclassifications into cost of products sold for net losses on commodity contracts in the third quarter and first nine months of 2024 , respectively. The tax impact of those reclassifications was $ 1,800 and $ 6,000 in the third quarter and first nine months of 2024 , respectively. Three-Month (13-Week) Period Ended September 30, 2023 Gains and (Losses) on Foreign Currency Adjustment to Early Hedging Derivatives Gains (Losses) Retiree Medical Plan Total Accumulated other comprehensive $ 3,500 $ ( 149,071 ) $ 16,599 $ ( 128,972 ) Other comprehensive income (loss) ( 4,779 ) ( 18,655 ) - ( 23,434 ) Amounts reclassified from (2) 3,579 - - 3,579 Net current-period other ( 1,200 ) ( 18,655 ) - ( 19,855 ) Accumulated other comprehensive $ 2,300 $ ( 167,726 ) $ 16,599 $ ( 148,827 ) Nine-Month (39-Week) Period Ended September 30, 2023 Gains and (Losses) on Foreign Currency Adjustment to Early Hedging Derivatives Gains (Losses) Retiree Medical Plan Total Accumulated other comprehensive $ 26,100 $ ( 180,216 ) $ 16,599 $ ( 137,517 ) Other comprehensive income (loss) ( 33,782 ) 12,490 - ( 21,292 ) Amounts reclassified from (2) 9,982 - - 9,982 Net current-period other ( 23,800 ) 12,490 - ( 11,310 ) Accumulated other comprehensive $ 2,300 $ ( 167,726 ) $ 16,599 $ ( 148,827 ) Includes $ 3,579 and $ 9,982 net-of-tax impact of accumulated other comprehensive income (loss) reclassifications into cost of products sold for net losses on commodity contracts in the third quarter and first nine months of 2023 , respectively. The tax impact of those reclassifications was $ 1,100 and $ 3,100 in the third quarter and first nine months of 2023 , respectively.

Segments (Tables)

Segments (Tables)	9 Months Ended
	Sep. 28, 2024
Segment Reporting [Abstract]
Segments	Nucor’s results by segment for the third quarter and first nine months of 2024 and 2023 were as follows (in thousands): Three Months (13 Weeks) Ended Nine Months (39 Weeks) Ended September 28, 2024 September 30, 2023 September 28, 2024 September 30, 2023 Net sales to external customers: Steel mills $ 4,459,509 $ 5,091,479 $ 14,486,492 $ 15,636,508 Steel products 2,496,160 3,235,969 7,715,804 9,954,828 Raw materials 488,491 448,286 1,456,119 1,417,634 $ 7,444,160 $ 8,775,734 $ 23,658,415 $ 27,008,970 Intercompany sales: Steel mills $ 983,070 $ 1,201,648 $ 3,405,794 $ 3,726,346 Steel products 124,159 132,481 416,628 333,099 Raw materials 2,743,191 2,894,079 8,602,394 9,653,600 Corporate/eliminations ( 3,850,420 ) ( 4,228,208 ) ( 12,424,816 ) ( 13,713,045 ) $ - $ - $ - $ - Earnings before income taxes and Steel mills $ 309,123 $ 882,614 $ 2,056,689 $ 3,124,549 Steel products 313,972 806,731 1,266,922 2,788,322 Raw materials ( 66,332 ) 71,367 ( 17,355 ) 267,918 Corporate/eliminations ( 168,490 ) ( 212,630 ) ( 794,479 ) ( 986,141 ) $ 388,273 $ 1,548,082 $ 2,511,777 $ 5,194,648 September 28, 2024 December 31, 2023 Segment assets: Steel mills $ 16,122,916 $ 15,407,266 Steel products 11,516,513 10,914,870 Raw materials 3,406,496 3,546,759 Corporate/eliminations 3,300,266 5,471,604 $ 34,346,191 $ 35,340,499

Revenue (Tables)

Revenue (Tables)	9 Months Ended
	Sep. 28, 2024
Revenue from Contract with Customer [Abstract]
Schedule of Net Sales Disaggregates by Major Source	The following tables disaggregate our revenue by major source for the third quarter and first nine months of 2024 and 2023 (in thousands): Three Months (13 Weeks) Ended September 28, 2024 Nine Months (39 Weeks) Ended September 28, 2024 Steel Steel Raw Total Steel Steel Raw Total Sheet $ 2,196,380 $ - $ - $ 2,196,380 $ 7,302,649 $ - $ - $ 7,302,649 Bar 1,263,897 - - 1,263,897 3,960,110 - - 3,960,110 Structural 534,931 - - 534,931 1,704,945 - - 1,704,945 Plate 464,301 - - 464,301 1,518,788 - - 1,518,788 Tubular Products - 291,425 - 291,425 - 1,004,884 - 1,004,884 Rebar Fabrication - 487,093 - 487,093 - 1,361,759 - 1,361,759 Joist - 274,903 - 274,903 - 944,227 - 944,227 Deck - 242,356 - 242,356 - 770,423 - 770,423 Building Systems - 341,965 - 341,965 - 1,016,497 - 1,016,497 Other Steel Products - 858,418 - 858,418 - 2,618,014 - 2,618,014 Raw Materials - - 488,491 488,491 - - 1,456,119 1,456,119 $ 4,459,509 $ 2,496,160 $ 488,491 $ 7,444,160 $ 14,486,492 $ 7,715,804 $ 1,456,119 $ 23,658,415 Three Months (13 Weeks) Ended September 30, 2023 Nine Months (39 Weeks) Ended September 30, 2023 Steel Steel Raw Total Steel Steel Raw Total Sheet $ 2,351,705 $ - $ - $ 2,351,705 $ 7,100,216 $ - $ - $ 7,100,216 Bar 1,448,433 - - 1,448,433 4,646,285 - - 4,646,285 Structural 626,633 - - 626,633 1,846,892 - - 1,846,892 Plate 664,708 - - 664,708 2,043,115 - - 2,043,115 Tubular Products - 370,472 - 370,472 - 1,246,006 - 1,246,006 Rebar Fabrication - 604,684 - 604,684 - 1,718,615 - 1,718,615 Joist - 528,018 - 528,018 - 1,802,809 - 1,802,809 Deck - 411,352 - 411,352 - 1,370,570 - 1,370,570 Building Systems - 392,658 - 392,658 - 1,017,706 - 1,017,706 Other Steel Products - 928,785 - 928,785 - 2,799,122 - 2,799,122 Raw Materials - - 448,286 448,286 - - 1,417,634 1,417,634 $ 5,091,479 $ 3,235,969 $ 448,286 $ 8,775,734 $ 15,636,508 $ 9,954,828 $ 1,417,634 $ 27,008,970

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 28, 2024
Earnings Per Share [Abstract]
Computations of Basic and Diluted Net Earnings Per Share	The computations of basic and diluted net earnings per share for the third quarter and first nine months of 2024 and 2023 are as follows (in thousands, except per share amounts): Three Months (13 Weeks) Ended Nine Months (39 Weeks) Ended September 28, 2024 September 30, 2023 September 28, 2024 September 30, 2023 Basic net earnings per share: Basic net earnings $ 249,910 $ 1,141,506 $ 1,739,968 $ 3,739,402 Earnings allocated to participating securities ( 1,117 ) ( 4,501 ) ( 7,556 ) ( 13,788 ) Net earnings available to common $ 248,793 $ 1,137,005 $ 1,732,412 $ 3,725,614 Basic average shares outstanding 236,462 248,504 239,701 250,752 Basic net earnings per share $ 1.05 $ 4.58 $ 7.23 $ 14.86 Diluted net earnings per share: Diluted net earnings $ 249,910 $ 1,141,506 $ 1,739,968 $ 3,739,402 Earnings allocated to participating securities ( 1,117 ) ( 4,488 ) ( 7,546 ) ( 13,747 ) Net earnings available to common $ 248,793 $ 1,137,018 $ 1,732,422 $ 3,725,655 Diluted average shares outstanding: Basic average shares outstanding 236,462 248,504 239,701 250,752 Dilutive effect of stock options and other 306 412 99 427 236,768 248,916 239,800 251,179 Diluted net earnings per share $ 1.05 $ 4.57 $ 7.22 $ 14.83
Anti-dilutive Stock Options	The following stock options were excluded from the computation of diluted net earnings per share for the third quarter and first nine months of 2024 and 2023 because their effect would have been anti-dilutive (shares in thousands): Three Months (13 Weeks) Ended Nine Months (39 Weeks) Ended September 28, 2024 September 30, 2023 September 28, 2024 September 30, 2023 Anti-dilutive stock options: Weighted-average shares 70 - 23 - Weighted-average exercise price $ 168.85 $ - $ 168.85 $ -

Acquisitions (Tables)

Acquisitions (Tables) - Rytec [Member]	9 Months Ended
	Sep. 28, 2024
Summary of Fair Values of Assets Acquired and Liabilities Assumed	The following table summarizes the fair values of the assets acquired and liabilities assumed of Rytec as of July 23, 2024, the date of acquisition (in thousands): Cash $ 1,263 Accounts receivable 34,812 Inventory 32,477 Other current assets 1,475 Property, plant and equipment 31,948 Goodwill 274,036 Other intangible assets 215,000 Other assets 58 Total assets acquired 591,069 Accounts payable 16,474 Salary, wages and related accruals 5,003 Other current liabilities 4,261 Total liabilities assumed 25,738 Net assets acquired $ 565,331
Summary of Purchase Price Allocation to Identifiable Intangible Assets	The following table summarizes the purchase price allocation to the identifiable intangible assets of Rytec as of July 23, 2024, the date of acquisition (in thousands, except years): Weighted- Average Life Customer relationships $ 185,000 15 years Trademarks and trade names 16,000 10 years Other intangibles 14,000 < 1 year $ 215,000

Inventories - Additional Inform

Inventories - Additional Information (Detail)	Sep. 28, 2024	Dec. 31, 2023
Inventory Disclosure [Abstract]
Raw materials and supplies in inventory, percentage	34%	37%
Finished and semi-finished products in inventory, percentage	66%	63%

Property, Plant and Equipment -

Property, Plant and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	Sep. 28, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Accumulated depreciation	$ 12,500,000	$ 11,790,000
Property, plant and equipment, net	12,580,243	$ 11,049,767
Steel Mills [Member] | Nucor-JFE Steel Mexico, S. de R.L. de C.V. [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 241,600

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Schedule of Change in Net Carrying Amount of Goodwill by Segment (Detail) $ in Thousands	9 Months Ended
	Sep. 28, 2024 USD ($)
Goodwill [Line Items]
Balance, beginning of period	$ 3,968,847
Acquisitions	308,624
Translation/Other	(3,861)
Balance, end of period	4,273,610
Steel Mills [Member]
Goodwill [Line Items]
Balance, beginning of period	675,186
Balance, end of period	675,186
Steel Products [Member]
Goodwill [Line Items]
Balance, beginning of period	2,514,172
Acquisitions	316,790
Translation/Other	(3,861)
Balance, end of period	2,827,101
Raw Materials [Member]
Goodwill [Line Items]
Balance, beginning of period	779,489
Acquisitions	(8,166)
Balance, end of period	$ 771,323

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023	Dec. 31, 2023
Finite And Indefinite Lived Intangible Assets [Line Items]
Impairment of goodwill			$ 0
Goodwill	$ 4,273,610,000		4,273,610,000		$ 3,968,847,000
Finite-lived intangible assets	3,194,261,000		3,194,261,000		$ 3,108,015,000
Intangible asset amortization expense	69,300,000	$ 58,500,000	189,100,000	$ 175,700,000
Future amortization expense, in 2024	264,100,000		264,100,000
Future amortization expense, in 2025	252,800,000		252,800,000
Future amortization expense, in 2026	248,200,000		248,200,000
Future amortization expense, in 2027	244,800,000		244,800,000
Future amortization expense, in 2028	$ 238,400,000		$ 238,400,000
Minimum [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Intangible assets, useful life	5 years		5 years
Maximum [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Intangible assets, useful life	25 years		25 years

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands	Sep. 28, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Amount	$ 4,947,448	$ 4,672,056
Intangible assets, Accumulated Amortization	1,753,187	1,564,041
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Amount	4,431,078	4,190,156
Intangible assets, Accumulated Amortization	1,455,570	1,295,778
Trademarks and Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Amount	387,219	372,153
Intangible assets, Accumulated Amortization	186,217	168,363
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Amount	129,151	109,747
Intangible assets, Accumulated Amortization	$ 111,400	$ 99,900

Current Liabilities - Additiona

Current Liabilities - Additional Information (Detail) - USD ($) $ in Millions	Sep. 28, 2024	Dec. 31, 2023
Liabilities, Current [Abstract]
Book overdrafts	$ 153.2	$ 159
Dividends payable, current	$ 128.1	$ 133.6

Fair Value Measurements - Sched

Fair Value Measurements - Schedule of Financial Assets and Liabilities Measured at Fair Value (Detail) - USD ($) $ in Thousands	Sep. 28, 2024	Dec. 31, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term investments	$ 595,650	$ 747,479
Total assets	34,346,191	35,340,499
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	3,595,175	5,724,549
Short-term investments	595,650	747,479
Restricted cash and cash equivalents		3,494
Derivative contracts, assets	300
Other assets	57,904	47,020
Total assets	4,249,029	6,522,542
Derivative contracts, liabilities	(15,198)	(23,211)
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	3,595,175	5,724,549
Short-term investments	595,650	747,479
Restricted cash and cash equivalents		3,494
Other assets	18,825	4,245
Total assets	4,209,650	6,479,767
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative contracts, assets	300
Total assets	300
Derivative contracts, liabilities	(15,198)	(23,211)
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets	39,079	42,775
Total assets	$ 39,079	$ 42,775

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Millions	Sep. 28, 2024	Dec. 31, 2023
Fair Value Disclosures [Abstract]
Fair value of short-term and long-term debt, including current maturities	$ 6,380	$ 6,220

Stock-Based Compensation - Sche

Stock-Based Compensation - Schedule of Stock Option Plans Activity (Detail) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Sep. 28, 2024 USD ($) $ / shares shares
Share-Based Payment Arrangement [Abstract]
Outstanding at beginning of year, Shares | shares	718
Granted, Shares | shares	73
Exercised, Shares | shares	(58)
Canceled, Shares | shares	(3)
Outstanding at September 28, 2024, Shares | shares	730
Stock options exercisable at September 28, 2024, Shares | shares	497
Outstanding at beginning of year, Weighted - Average Exercise Price | $ / shares	$ 78.33
Granted, Weighted - Average Exercise Price | $ / shares	168.85
Exercised, Weighted - Average Exercise Price | $ / shares	49.94
Canceled, Weighted - Average Exercise Price | $ / shares	168.85
Outstanding at September 28, 2024, Weighted - Average Exercise Price | $ / shares	89.25
Stock options exercisable at September 28, 2024, Weighted - Average Exercise Price | $ / shares	$ 64.24
Outstanding, Weighted - Average Remaining Contractual Life	6 years 9 months 18 days
Stock options exercisable, Weighted - Average Remaining Contractual Life	5 years 10 months 24 days
Exercised, Aggregate Intrinsic Value | $	$ 8,211
Outstanding at September 28, 2024, Aggregate Intrinsic Value | $	45,774
Stock options exercisable, Aggregate Intrinsic Value | $	$ 42,722

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expenses for stock options	$ 0.3	$ 0.4	$ 4.3	$ 4.3
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to stock	2.4		$ 2.4
Weighted-average recognition period for unrecognized compensation expense related to stock (years)			2 years 1 month 6 days
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to stock	120.7		$ 120.7
Weighted-average recognition period for unrecognized compensation expense related to stock (years)			1 year 3 months 18 days
Compensation expense	20.2	14	$ 87	74.7
Restricted Stock Awards and Units [Member] | AIP and LTIP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to stock	12.1		$ 12.1
Weighted-average recognition period for unrecognized compensation expense related to stock (years)			1 year 9 months 18 days
Compensation expense	$ 4	$ 3.1	$ 22.9	$ 22.5

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of Nucor's Restricted Stock Unit ("RSU") Activity (Detail) - Restricted Stock Units [Member] shares in Thousands	9 Months Ended
	Sep. 28, 2024 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested at beginning of year, Shares | shares	947
Granted, Shares | shares	749
Vested, Shares | shares	(632)
Canceled, Shares | shares	(19)
Unvested at September 28, 2024, Shares | shares	1,045
Unvested at beginning of year, Grant Date Fair Value Per Share | $ / shares	$ 124.89
Granted, Grant Date Fair Value Per Share | $ / shares	168.85
Vested, Grant Date Fair Value Per Share | $ / shares	143.23
Canceled, Grant Date Fair Value Per Share | $ / shares	149.35
Unvested at September 28, 2024, Grant Date Fair Value Per Share | $ / shares	$ 144.87

Stock-Based Compensation - Su_2

Stock-Based Compensation - Summary of Nucor's Restricted Stock Activity under AIP and LTIP (Detail) - Restricted Stock Units and Restricted Stock Awards [Member] shares in Thousands	9 Months Ended
	Sep. 28, 2024 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested at beginning of year, Shares | shares	210
Granted, Shares | shares	421
Vested, Shares | shares	(367)
Canceled, Shares | shares	0
Unvested at September 28, 2024, Shares | shares	264
Unvested at beginning of year, Grant Date Fair Value Per Share | $ / shares	$ 145.55
Granted, Grant Date Fair Value Per Share | $ / shares	187.54
Vested, Grant Date Fair Value Per Share | $ / shares	176.43
Canceled, Grant Date Fair Value Per Share | $ / shares	0
Unvested at September 28, 2024, Grant Date Fair Value Per Share | $ / shares	$ 169.52

Employee Benefit Plan - Additio

Employee Benefit Plan - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Employee Benefit Plan [Abstract]
Profit Sharing and Retirement Savings Plan, plan expense	$ 39.3	$ 148.6	$ 250.9	$ 505.2

Interest (Income) Expense - Sch

Interest (Income) Expense - Schedule of Components of Net Interest Expense (Income) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Interest Income (Expense), Operating and Nonoperating [Abstract]
Interest expense	$ 65,376	$ 63,228	$ 175,715	$ 186,716
Interest income	(58,094)	(77,361)	(208,526)	(186,068)
Interest expense (income), net	$ 7,282	$ (14,133)	$ (32,811)	$ 648

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Effective income tax rate	22%	21.10%
Non-current deferred tax liabilities included in deferred credits and other liabilities	$ 1,250		$ 1,330
Non-current deferred tax assets included in other assets	$ 34		$ 40.7

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023	Dec. 31, 2023	May 11, 2023
Dividends declared per share	$ 0.54	$ 0.51	$ 1.62	$ 1.53
Common Stock [Member]
Share repurchase program, available repurchase amount	$ 1,420		$ 1,420
Common Stock [Member] | Maximum [Member]
Stock Repurchase Program, Authorized Amount						$ 4,000
Nucor-Yamato Steel Company [Member]
Noncontrolling interest, ownership percentage by parent	51%	51%	51%	51%
California Steel Industries Inc [Member]
Noncontrolling interest, ownership percentage by parent	51%	51%	51%	51%
Nucor-JFE Steel Mexico, S. de R.L. de C.V. [Member]
Noncontrolling interest, ownership percentage by parent	51%		51%
Percentage of additional Interest acquired					1%

Stockholders' Equity - Schedule

Stockholders' Equity - Schedule of Change in Stockholder's Equity (Detail) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
BALANCES, beginning of period	$ 21,772,508	$ 20,940,928	$ 22,123,754	$ 19,569,906
Net earnings before noncontrolling interests	302,825	1,221,255	1,973,930	4,039,959
Other comprehensive income (loss)	9,405	(19,855)	(6,161)	(11,310)
Stock options exercised		3,227	$ 2,880	10,350
Stock options exercised (in shares)			58
Stock option expense	346	392	$ 4,364	4,314
Issuance of stock under award plans, net of forfeitures	18,575	16,353	90,865	76,322
Amortization of unearned compensation	2,584	1,599	7,684	4,864
Treasury stock acquired and net impact of excise tax	(403,409)	(504,242)	(1,919,029)	(1,388,869)
Cash dividends declared	(128,078)	(126,942)	(388,347)	(384,050)
Distributions to noncontrolling interests	(18,215)	(23,633)	(333,399)	(412,404)
BALANCES, end of period	21,556,541	21,509,082	21,556,541	21,509,082
Common Stock [Member]
BALANCES, beginning of period	$ 152,061	$ 152,061	$ 152,061	$ 152,061
BALANCES, shares at beginning of period	380,154	380,154	380,154	380,154
BALANCES, end of period	$ 152,061	$ 152,061	$ 152,061	$ 152,061
BALANCES, shares at end of period	380,154	380,154	380,154	380,154
Additional Paid-in Capital [Member]
BALANCES, beginning of period	$ 2,189,371	$ 2,149,693	$ 2,176,243	$ 2,143,520
Stock options exercised		(386)	(1,570)	(2,135)
Stock option expense	346	392	4,364	4,314
Issuance of stock under award plans, net of forfeitures	15,627	14,337	21,207	15,072
Amortization of unearned compensation	2,584	1,599	7,684	4,864
BALANCES, end of period	2,207,928	2,165,635	2,207,928	2,165,635
Retained Earnings [Member]
BALANCES, beginning of period	29,991,834	27,095,661	28,762,045	24,754,873
Net earnings before noncontrolling interests	249,910	1,141,506	1,739,968	3,739,402
Cash dividends declared	(128,078)	(126,942)	(388,347)	(384,050)
BALANCES, end of period	30,113,666	28,110,225	30,113,666	28,110,225
Accumulated Other Comprehensive Income (Loss) [Member]
BALANCES, beginning of period	(177,638)	(128,972)	(162,072)	(137,517)
Other comprehensive income (loss)	9,405	(19,855)	(6,161)	(11,310)
BALANCES, end of period	(168,233)	(148,827)	(168,233)	(148,827)
Treasury Stock (at cost) [Member]
BALANCES, beginning of period	$ (11,432,103)	$ (9,314,764)	$ (9,987,643)	$ (8,498,243)
BALANCES, shares at beginning of period	142,816	131,431	135,252	126,661
Stock options exercised		$ 3,613	$ 4,450	$ 12,485
Stock options exercised (in shares)		(50)	(58)	(181)
Issuance of stock under award plans, net of forfeitures	$ 2,948	$ 2,016	$ 69,658	$ 61,250
Issuance of stock under award plans, net of forfeitures, shares	(40)	(28)	(886)	(917)
Treasury stock acquired and net impact of excise tax	$ (403,409)	$ (504,242)	$ (1,919,029)	$ (1,388,869)
Treasury stock acquired and net impact of excise tax (in shares)	2,565	2,962	11,033	8,752
BALANCES, end of period	$ (11,832,564)	$ (9,813,377)	$ (11,832,564)	$ (9,813,377)
BALANCES, shares at end of period	145,341	134,315	145,341	134,315
Total Nucor Stockholders' Equity [Member]
BALANCES, beginning of period	$ 20,723,525	$ 19,953,679	$ 20,940,634	$ 18,414,694
Net earnings before noncontrolling interests	249,910	1,141,506	1,739,968	3,739,402
Other comprehensive income (loss)	9,405	(19,855)	(6,161)	(11,310)
Stock options exercised		3,227	2,880	10,350
Stock option expense	346	392	4,364	4,314
Issuance of stock under award plans, net of forfeitures	18,575	16,353	90,865	76,322
Amortization of unearned compensation	2,584	1,599	7,684	4,864
Treasury stock acquired and net impact of excise tax	(403,409)	(504,242)	(1,919,029)	(1,388,869)
Cash dividends declared	(128,078)	(126,942)	(388,347)	(384,050)
BALANCES, end of period	20,472,858	20,465,717	20,472,858	20,465,717
Noncontrolling Interests [Member]
BALANCES, beginning of period	1,048,983	987,249	1,183,120	1,155,212
Net earnings before noncontrolling interests	52,915	79,749	233,962	300,557
Distributions to noncontrolling interests	(18,215)	(23,633)	(333,399)	(412,404)
BALANCES, end of period	$ 1,083,683	$ 1,043,365	$ 1,083,683	$ 1,043,365

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 28, 2024		Sep. 30, 2023		Sep. 28, 2024		Sep. 30, 2023
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning Balance, Gains and (Losses) on Hedging Derivatives	$ (6,200)		$ 3,500		$ (13,900)		$ 26,100
Other comprehensive income (loss) before reclassifications, Gains and (Losses) on Hedging Derivatives	(6,055)		(4,779)		(11,171)		(33,782)
Amounts reclassified from accumulated other comprehensive income (loss) into earnings, Gains and (Losses) on Hedging Derivatives	5,955	[1]	3,579	[2]	18,771	[1]	9,982	[2]
Net current-period other comprehensive income (loss), Gains and (Losses) on Hedging Derivatives	(100)		(1,200)		7,600		(23,800)
Ending Balance, Gains and (Losses) on Hedging Derivatives	(6,300)		2,300		(6,300)		2,300
Beginning Balance, Foreign Currency Gains (Losses)	(182,441)		(149,071)		(159,175)		(180,216)
Other comprehensive income (loss) before reclassifications, Foreign Currency Gains (Losses)	9,505		(18,655)		(13,761)		12,490
Net current-period other comprehensive income (loss), Foreign Currency Gains (Losses)	9,505		(18,655)		(13,761)		12,490
Ending Balance, Foreign Currency Gains (Losses)	(172,936)		(167,726)		(172,936)		(167,726)
Beginning Balance, Adjustment to Early Retiree Medical Plan	11,003		16,599		11,003		16,599
Ending Balance, Adjustment to Early Retiree Medical Plan	11,003		16,599		11,003		16,599
Beginning Balance	(177,638)		(128,972)		(162,072)		(137,517)
Other comprehensive income (loss) before reclassifications	3,450		(23,434)		(24,932)		(21,292)
Amounts reclassified from accumulated other comprehensive income (loss) into earnings	5,955	[1]	3,579	[2]	18,771	[1]	9,982	[2]
Net current-period other comprehensive income (loss)	9,405		(19,855)		(6,161)		(11,310)
Ending Balance	$ (168,233)		$ (148,827)		$ (168,233)		$ (148,827)
[1] Includes $ 5,955 and $ 18,771 net-of-tax impact of accumulated other comprehensive income (loss) reclassifications into cost of products sold for net losses on commodity contracts in the third quarter and first nine months of 2024 , respectively. The tax impact of those reclassifications was $ 1,800 and $ 6,000 in the third quarter and first nine months of 2024 , respectively. Includes $ 3,579 and $ 9,982 net-of-tax impact of accumulated other comprehensive income (loss) reclassifications into cost of products sold for net losses on commodity contracts in the third quarter and first nine months of 2023 , respectively. The tax impact of those reclassifications was $ 1,100 and $ 3,100 in the third quarter and first nine months of 2023 , respectively.

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Income (Loss) (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 28, 2024		Sep. 30, 2023		Sep. 28, 2024		Sep. 30, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified from accumulated other comprehensive income (loss) into earnings, Gains and (Losses) on Hedging Derivatives	$ 5,955	[1]	$ 3,579	[2]	$ 18,771	[1]	$ 9,982	[2]
Reclassification adjustment for (gain) loss on settlement of hedging derivatives included in net earnings, tax effect	1,800		1,100		6,000		3,100
Cost of Products Sold [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified from accumulated other comprehensive income (loss) into earnings, Gains and (Losses) on Hedging Derivatives	5,955		3,579		18,771		9,982
Reclassification adjustment for (gain) loss on settlement of hedging derivatives included in net earnings, tax effect	$ 1,800		$ 1,100		$ 6,000		$ 3,100
[1] Includes $ 5,955 and $ 18,771 net-of-tax impact of accumulated other comprehensive income (loss) reclassifications into cost of products sold for net losses on commodity contracts in the third quarter and first nine months of 2024 , respectively. The tax impact of those reclassifications was $ 1,800 and $ 6,000 in the third quarter and first nine months of 2024 , respectively. Includes $ 3,579 and $ 9,982 net-of-tax impact of accumulated other comprehensive income (loss) reclassifications into cost of products sold for net losses on commodity contracts in the third quarter and first nine months of 2023 , respectively. The tax impact of those reclassifications was $ 1,100 and $ 3,100 in the third quarter and first nine months of 2023 , respectively.

Segments - Segments (Detail)

Segments - Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023	Dec. 31, 2023
Segment Reporting Information [Line Items]
Net sales	$ 7,444,160	$ 8,775,734	$ 23,658,415	$ 27,008,970
Earnings (losses) before income taxes and noncontrolling interests	388,273	1,548,082	2,511,777	5,194,648
Total assets	34,346,191		34,346,191		$ 35,340,499
Operating Segments [Member] | Steel Mills [Member]
Segment Reporting Information [Line Items]
Net sales	4,459,509	5,091,479	14,486,492	15,636,508
Earnings (losses) before income taxes and noncontrolling interests	309,123	882,614	2,056,689	3,124,549
Total assets	16,122,916		16,122,916		15,407,266
Operating Segments [Member] | Steel Products [Member]
Segment Reporting Information [Line Items]
Net sales	2,496,160	3,235,969	7,715,804	9,954,828
Earnings (losses) before income taxes and noncontrolling interests	313,972	806,731	1,266,922	2,788,322
Total assets	11,516,513		11,516,513		10,914,870
Operating Segments [Member] | Raw Materials [Member]
Segment Reporting Information [Line Items]
Net sales	488,491	448,286	1,456,119	1,417,634
Earnings (losses) before income taxes and noncontrolling interests	(66,332)	71,367	(17,355)	267,918
Total assets	3,406,496		3,406,496		3,546,759
Intercompany Eliminations [Member] | Steel Mills [Member]
Segment Reporting Information [Line Items]
Net sales	983,070	1,201,648	3,405,794	3,726,346
Intercompany Eliminations [Member] | Steel Products [Member]
Segment Reporting Information [Line Items]
Net sales	124,159	132,481	416,628	333,099
Intercompany Eliminations [Member] | Raw Materials [Member]
Segment Reporting Information [Line Items]
Net sales	2,743,191	2,894,079	8,602,394	9,653,600
Corporate and Eliminations Items [Member]
Segment Reporting Information [Line Items]
Net sales	(3,850,420)	(4,228,208)	(12,424,816)	(13,713,045)
Earnings (losses) before income taxes and noncontrolling interests	(168,490)	$ (212,630)	(794,479)	$ (986,141)
Corporate/eliminations [Member]
Segment Reporting Information [Line Items]
Total assets	$ 3,300,266		$ 3,300,266		$ 5,471,604

Revenue - Schedule of Net Sales

Revenue - Schedule of Net Sales Disaggregates by Major Source (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Revenue from Contract with Customers [Line Items]
Revenues	$ 7,444,160	$ 8,775,734	$ 23,658,415	$ 27,008,970
Sheet [Member]
Revenue from Contract with Customers [Line Items]
Revenues	2,196,380	2,351,705	7,302,649	7,100,216
Bar [Member]
Revenue from Contract with Customers [Line Items]
Revenues	1,263,897	1,448,433	3,960,110	4,646,285
Structural [Member]
Revenue from Contract with Customers [Line Items]
Revenues	534,931	626,633	1,704,945	1,846,892
Plate [Member]
Revenue from Contract with Customers [Line Items]
Revenues	464,301	664,708	1,518,788	2,043,115
Tubular Products [Member]
Revenue from Contract with Customers [Line Items]
Revenues	291,425	370,472	1,004,884	1,246,006
Rebar Fabrication [Member]
Revenue from Contract with Customers [Line Items]
Revenues	487,093	604,684	1,361,759	1,718,615
Joist [Member]
Revenue from Contract with Customers [Line Items]
Revenues	274,903	528,018	944,227	1,802,809
Deck [Member]
Revenue from Contract with Customers [Line Items]
Revenues	242,356	411,352	770,423	1,370,570
Building Systems [Member]
Revenue from Contract with Customers [Line Items]
Revenues	341,965	392,658	1,016,497	1,017,706
Other Steel Products [Member]
Revenue from Contract with Customers [Line Items]
Revenues	858,418	928,785	2,618,014	2,799,122
Raw Materials [Member]
Revenue from Contract with Customers [Line Items]
Revenues	488,491	448,286	1,456,119	1,417,634
Steel Mills [Member]
Revenue from Contract with Customers [Line Items]
Revenues	4,459,509	5,091,479	14,486,492	15,636,508
Steel Mills [Member] | Sheet [Member]
Revenue from Contract with Customers [Line Items]
Revenues	2,196,380	2,351,705	7,302,649	7,100,216
Steel Mills [Member] | Bar [Member]
Revenue from Contract with Customers [Line Items]
Revenues	1,263,897	1,448,433	3,960,110	4,646,285
Steel Mills [Member] | Structural [Member]
Revenue from Contract with Customers [Line Items]
Revenues	534,931	626,633	1,704,945	1,846,892
Steel Mills [Member] | Plate [Member]
Revenue from Contract with Customers [Line Items]
Revenues	464,301	664,708	1,518,788	2,043,115
Steel Products [Member]
Revenue from Contract with Customers [Line Items]
Revenues	2,496,160	3,235,969	7,715,804	9,954,828
Steel Products [Member] | Tubular Products [Member]
Revenue from Contract with Customers [Line Items]
Revenues	291,425	370,472	1,004,884	1,246,006
Steel Products [Member] | Rebar Fabrication [Member]
Revenue from Contract with Customers [Line Items]
Revenues	487,093	604,684	1,361,759	1,718,615
Steel Products [Member] | Joist [Member]
Revenue from Contract with Customers [Line Items]
Revenues	274,903	528,018	944,227	1,802,809
Steel Products [Member] | Deck [Member]
Revenue from Contract with Customers [Line Items]
Revenues	242,356	411,352	770,423	1,370,570
Steel Products [Member] | Building Systems [Member]
Revenue from Contract with Customers [Line Items]
Revenues	341,965	392,658	1,016,497	1,017,706
Steel Products [Member] | Other Steel Products [Member]
Revenue from Contract with Customers [Line Items]
Revenues	858,418	928,785	2,618,014	2,799,122
Raw Materials [Member]
Revenue from Contract with Customers [Line Items]
Revenues	488,491	448,286	1,456,119	1,417,634
Raw Materials [Member] | Raw Materials [Member]
Revenue from Contract with Customers [Line Items]
Revenues	$ 488,491	$ 448,286	$ 1,456,119	$ 1,417,634

Revenue - Additional Informatio

Revenue - Additional Information (Detail) - USD ($) $ in Millions	Sep. 28, 2024	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Contract liabilities	$ 207.6	$ 313.8

Earnings Per Share - Computatio

Earnings Per Share - Computations of Basic and Diluted Net Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Earnings Per Share [Abstract]
Net Income (Loss)	$ 249,910	$ 1,141,506	$ 1,739,968	$ 3,739,402
Earnings allocated to participating securities, Basic	(1,117)	(4,501)	(7,556)	(13,788)
Net earnings available to common stockholders, Basic	$ 248,793	$ 1,137,005	$ 1,732,412	$ 3,725,614
Basic average shares outstanding	236,462	248,504	239,701	250,752
Basic net earnings per share	$ 1.05	$ 4.58	$ 7.23	$ 14.86
Diluted net earnings	$ 249,910	$ 1,141,506	$ 1,739,968	$ 3,739,402
Earnings allocated to participating securities, Diluted	(1,117)	(4,488)	(7,546)	(13,747)
Net earnings available to common stockholders, Diluted	$ 248,793	$ 1,137,018	$ 1,732,422	$ 3,725,655
Dilutive effect of stock options and other	306	412	99	427
Diluted average shares outstanding	236,768	248,916	239,800	251,179
Diluted net earnings per share	$ 1.05	$ 4.57	$ 7.22	$ 14.83

Earnings Per Share - Anti-dilut

Earnings Per Share - Anti-dilutive Stock Options (Detail) - $ / shares shares in Thousands	3 Months Ended	9 Months Ended
	Sep. 28, 2024	Sep. 28, 2024
Earnings Per Share [Abstract]
Weighted-average shares	70	23
Weighted-average exercise price	$ 168.85	$ 168.85

Acquisitions - Additional Infor

Acquisitions - Additional Information (Details) - USD ($) $ in Thousands	Jul. 23, 2024	Sep. 28, 2024	Dec. 31, 2023
Business Acquisition [Line Items]
Goodwill		$ 4,273,610	$ 3,968,847
Steel Products [Member]
Business Acquisition [Line Items]
Goodwill		$ 2,827,101	$ 2,514,172
Rytec [Member]
Business Acquisition [Line Items]
Business acquisition, purchase price	$ 565,000
Goodwill	274,036
Goodwill recognized for tax purposes	274,000
Rytec [Member] | Steel Products [Member]
Business Acquisition [Line Items]
Goodwill	$ 274,000

Acquisitions - Summary of Fair

Acquisitions - Summary of Fair Values of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Sep. 28, 2024	Jul. 23, 2024	Dec. 31, 2023
Business Acquisition [Line Items]
Goodwill	$ 4,273,610		$ 3,968,847
Rytec [Member]
Business Acquisition [Line Items]
Cash		$ 1,263
Accounts receivable		34,812
Inventory		32,477
Other current assets		1,475
Property, plant and equipment		31,948
Goodwill		274,036
Other intangible assets		215,000
Other assets		58
Total assets acquired		591,069
Accounts payable		16,474
Salary, wages and related accruals		5,003
Other current liabilities		4,261
Total liabilities assumed		25,738
Net assets acquired		$ 565,331

Acquisitions - Summary of Purch

Acquisitions - Summary of Purchase Price Allocation to Identifiable Intangible Assets (Detail) - Rytec [Member] $ in Thousands	Jul. 23, 2024 USD ($)
Business Acquisition [Line Items]
Identifiable intangible assets	$ 215,000
Customer Relationships [Member]
Business Acquisition [Line Items]
Identifiable intangible assets	$ 185,000
Weighted-Average Life	15 years
Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Identifiable intangible assets	$ 16,000
Weighted-Average Life	10 years
Other Intangibles [Member]
Business Acquisition [Line Items]
Identifiable intangible assets	$ 14,000
Other Intangibles [Member] | Maximum [Member]
Business Acquisition [Line Items]
Weighted-Average Life	1 year