10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended October 3, 2020

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                      to                     

Commission File Number: 1-4119

NUCOR CORPORATION

(Exact name of registrant as specified in its charter)

Delaware	13-1860817
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
1915 Rexford Road, Charlotte, North Carolina	28211
(Address of principal executive offices)	(Zip Code)

(704) 366-7000

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, par value $0.40 per share	NUE	New York Stock Exchange

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ☒    No  ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes   ☒      No    ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☒	Accelerated filer	☐
Non-accelerated filer	☐	Smaller reporting company	☐
		Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ☐    No   ☒

301,928,935 shares of the registrant’s common stock were outstanding at October 3, 2020.

Nucor Corporation

Quarterly Report on Form 10-Q

For the Three Months and Nine Months Ended October 3, 2020

TABLE OF CONTENTS

			Page
Part I	Financial Information
	Item 1	Financial Statements (Unaudited)
		Condensed Consolidated Statements of Earnings – Three Months (13 Weeks) and Nine Months (39 Weeks) Ended October 3, 2020 and September 28, 2019	1
		Condensed Consolidated Statements of Comprehensive Income – Three Months (13 Weeks) and Nine Months (39 Weeks) Ended October 3, 2020 and September 28, 2019	2
		Condensed Consolidated Balance Sheets – October 3, 2020 and December 31, 2019	3
		Condensed Consolidated Statements of Cash Flows – Nine Months (39 Weeks) Ended October 3, 2020 and September 28, 2019	4
		Notes to Condensed Consolidated Financial Statements	5
	Item 2	Management’s Discussion and Analysis of Financial Condition and Results of Operations	19
	Item 3	Quantitative and Qualitative Disclosures About Market Risk	27
	Item 4	Controls and Procedures	28
Part II	Other Information
	Item 1	Legal Proceedings	29
	Item 1A	Risk Factors	29
	Item 6	Exhibits	30
Signatures			31

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PART I. FINANCIAL INFORMATION

Item 1. Financial Statements

Nucor Corporation Condensed Consolidated Statements of Earnings (Unaudited)

(In thousands, except per share amounts)

	Three Months (13 Weeks) Ended					Nine Months (39 Weeks) Ended
	Oct. 3, 2020			Sept. 28, 2019		Oct. 3, 2020		Sept. 28, 2019
Net sales	$	4,927,960		$	5,464,502	$	14,879,603	$	17,457,112
Costs, expenses and other:
Cost of products sold		4,425,765			4,891,991		13,370,181		15,213,215
Marketing, administrative and other expenses		165,513			159,301		460,922		549,020
Equity in losses (earnings) of unconsolidated affiliates		(479	)		1,585		14,422		(2,459	)
Losses on assets		6,604			-		299,450		-
Interest expense, net		40,139			31,286		116,856		92,759
		4,637,542			5,084,163		14,261,831		15,852,535
Earnings before income taxes and noncontrolling interests		290,418			380,339		617,772		1,604,577
Provision for income taxes		67,788			86,752		207,610		367,920
Net earnings		222,630			293,587		410,162		1,236,657
Earnings attributable to noncontrolling interests		29,215			18,556		87,535		73,337
Net earnings attributable to Nucor stockholders	$	193,415		$	275,031	$	322,627	$	1,163,320
Net earnings per share:
Basic	$	0.63		$	0.90	$	1.06	$	3.79
Diluted	$	0.63		$	0.90	$	1.06	$	3.78
Average shares outstanding:
Basic		303,394			304,637		303,072		305,553
Diluted		303,441			304,980		303,099		306,029

See notes to condensed consolidated financial statements.

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Nucor Corporation Condensed Consolidated Statements of Comprehensive Income (Unaudited)

(In thousands)

	Three Months (13 Weeks) Ended						Nine Months (39 Weeks) Ended
	Oct. 3, 2020			Sept. 28, 2019			Oct. 3, 2020			Sept. 28, 2019
Net earnings	$	222,630		$	293,587		$	410,162		$	1,236,657
Other comprehensive income:
Net unrealized income (loss) on hedging derivatives, net    of income taxes of $2,000 and $(1,000) for the third    quarter of 2020 and 2019, respectively, and $1,400    and $(2,500) for the first nine months of 2020 and    2019, respectively		6,387			(3,315	)		4,888			(7,801	)
Reclassification adjustment for settlement of hedging    derivatives included in net income, net of income    taxes of $700 and $500 for the third quarter of 2020    and 2019, respectively, and $2,300 and $500 for the    first nine months of 2020 and 2019, respectively		2,113			1,615			6,712			1,501
Foreign currency translation gain (loss), net of income    taxes of $0 for the third quarter and first nine months    of 2020 and 2019		16,867			(14,306	)		(24,103	)		(5,219	)
		25,367			(16,006	)		(12,503	)		(11,519	)
Comprehensive income		247,997			277,581			397,659			1,225,138
Comprehensive income attributable to noncontrolling    interests		(29,215	)		(18,556	)		(87,535	)		(73,337	)
Comprehensive income attributable to Nucor stockholders	$	218,782		$	259,025		$	310,124		$	1,151,801

See notes to condensed consolidated financial statements.

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Nucor Corporation Condensed Consolidated Balance Sheets (Unaudited)

(In thousands)

	Oct. 3, 2020			Dec. 31, 2019
ASSETS
Current assets:
Cash and cash equivalents	$	2,866,578		$	1,534,605
Short-term investments		412,401			300,040
Accounts receivable, net		2,119,421			2,160,102
Inventories, net		3,260,685			3,842,095
Other current assets		306,762			389,528
Total current assets		8,965,847			8,226,370
Property, plant and equipment, net		6,829,733			6,178,555
Restricted cash and cash equivalents		131,623			-
Goodwill		2,195,788			2,201,063
Other intangible assets, net		678,558			742,186
Other assets		717,728			996,492
Total assets	$	19,519,277		$	18,344,666
LIABILITIES
Current liabilities:
Short-term debt	$	63,778		$	62,444
Current portion of long-term debt and finance lease obligations		10,475			29,264
Accounts payable		1,210,987			1,201,698
Salaries, wages and related accruals		432,767			510,844
Accrued expenses and other current liabilities		655,288			659,524
Total current liabilities		2,373,295			2,463,774
Long-term debt and finance lease obligations due after one year		5,452,193			4,291,301
Deferred credits and other liabilities		976,722			798,415
Total liabilities		8,802,210			7,553,490
EQUITY
Nucor stockholders' equity:
Common stock		152,061			152,061
Additional paid-in capital		2,117,582			2,107,646
Retained earnings		11,068,908			11,115,056
Accumulated other comprehensive loss,    net of income taxes		(315,469	)		(302,966	)
Treasury stock		(2,720,668	)		(2,713,931	)
Total Nucor stockholders' equity		10,302,414			10,357,866
Noncontrolling interests		414,653			433,310
Total equity		10,717,067			10,791,176
Total liabilities and equity	$	19,519,277		$	18,344,666

See notes to condensed consolidated financial statements.

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Nucor Corporation Condensed Consolidated Statements of Cash Flows (Unaudited)

(In thousands)

	Nine Months (39 Weeks) Ended
	Oct. 3, 2020			Sept. 28, 2019
Operating activities:
Net earnings	$	410,162		$	1,236,657
Adjustments:
Depreciation		525,688			477,957
Amortization		62,877			64,655
Stock-based compensation		56,122			74,311
Deferred income taxes		140,606			76,737
Distributions from affiliates		3,021			27,405
Equity in losses (earnings) of unconsolidated affiliates		14,422			(2,459	)
Losses on assets		299,450			-
Changes in assets and liabilities (exclusive of acquisitions and dispositions):
Accounts receivable		37,547			197,783
Inventories		590,434			476,761
Accounts payable		15,366			(180,397	)
Federal income taxes		18,848			(177,405	)
Salaries, wages and related accruals		(69,235	)		(157,317	)
Other operating activities		100,283			5,526
Cash provided by operating activities		2,205,591			2,120,214
Investing activities:
Capital expenditures		(1,179,081	)		(984,646	)
Investment in and advances to affiliates		(16,542	)		(27,613	)
Divestiture of affiliates		-			67,591
Disposition of plant and equipment		19,492			32,922
Acquisitions (net of cash acquired)		(20,368	)		(9,495	)
Purchase of investments		(401,986	)		(249,616	)
Proceeds from the sale of investments		301,249			-
Other investing activities		(33,536	)		2,176
Cash used in investing activities		(1,330,772	)		(1,168,681	)
Financing activities:
Net change in short-term debt		1,334			(10,145	)
Proceeds from long-term debt, net of discount		1,237,635			-
Repayment of long-term debt		(97,150	)		-
Bond issuance related costs		(6,250	)		-
Issuance of common stock		-			5,892
Payment of tax withholdings on certain stock-based compensation		(17,691	)		(15,723	)
Distributions to noncontrolling interests		(106,193	)		(71,241	)
Cash dividends		(368,636	)		(369,270	)
Acquisition of treasury stock		(39,499	)		(197,511	)
Other financing activities		(6,983	)		(6,538	)
Cash provided by (used in) financing activities		596,567			(664,536	)
Effect of exchange rate changes on cash		(7,790	)		482
Increase in cash and cash equivalents		1,463,596			287,479
Cash and cash equivalents - beginning of year		1,534,605			1,398,886
Cash and cash equivalents and restricted cash and    cash equivalents - end of nine months	$	2,998,201		$	1,686,365
Non-cash investing activity:
Change in accrued plant and equipment purchases	$	-		$	62,700

See notes to condensed consolidated financial statements.

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Nucor Corporation – Notes to Condensed Consolidated Financial Statements (Unaudited)

1. Basis of Interim Presentation

The information furnished in this Item 1 reflects all adjustments which are, in the opinion of management, necessary to 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, 2019 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, 2019.

2. Inventories

Inventories consisted of approximately 40% raw materials and supplies and 60% finished and semi-finished products at October 3, 2020 (42% and 58%, respectively, at December 31, 2019). 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.

3. Property, Plant and Equipment

Property, plant and equipment is recorded net of accumulated depreciation of $9.87 billion at October 3, 2020 ($9.42 billion at December 31, 2019).

Nucor performed an impairment assessment of its proved producing natural gas well assets in the fourth quarter of 2019. One of the main assumptions that most significantly affects the undiscounted cash flows determination used in the impairment assessment is management’s estimate of future pricing of natural gas and natural gas liquids. The pricing used in the impairment assessment was developed by management based on projected natural gas market supply and demand dynamics, in conjunction with a review of projections by market analysts. Management also makes key estimates on the expected reserve levels and on the expected lease operating costs. The impairment assessment was performed on each of Nucor’s three groups (“fields”) of wells, with each field defined by common geographic location.

As a result of the impairment assessment, Nucor recorded a non-cash impairment charge of $35.0 million relating to one field of wells in the fourth quarter of 2019. The post-impairment carrying value of this field was $11.2 million at October 3, 2020 ($12.3 million at December 31, 2019). The remaining two fields were not impaired as a result of the assessment and had a combined carrying value of $62.4 million at October 3, 2020 ($66.6 million at December 31, 2019). Changes in the natural gas industry or a prolonged low-price environment beyond what had already been assumed in the assessments could cause management to revise the natural gas and natural gas liquids price assumptions, the estimated reserves or the estimated lease operating costs. Unfavorable revisions to these assumptions or estimates could possibly result in further impairment of some or all of the fields of proved well assets.

Nucor owns a 49% leasehold interest in unproved oil and natural gas properties covering approximately 54,000 acres in the South Piceance Basin located in Colorado. Nucor is subject to forfeiture of a portion of its leasehold interest in these properties if we do not drill new wells within various contractually specified time periods. A decision to not develop a portion of these properties within the specified time periods would likely result in a partial asset impairment in the future. The carrying value of the entire leasehold interest at October 3, 2020 was $165.0 million. Nucor has full discretion on its participation in all future drilling capital investments related to the leasehold interest.

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4. Goodwill and Other Intangible Assets

The change in the net carrying amount of goodwill for the nine months ended October 3, 2020 by segment was as follows (in thousands):

	Steel Mills		Steel Products			Raw Materials		Total
Balance at December 31, 2019	$	591,986	$	879,500		$	729,577	$	2,201,063
Other		-		(821	)		-		(821	)
Translation		-		(4,454	)		-		(4,454	)
Balance at October 3, 2020	$	591,986	$	874,225		$	729,577	$	2,195,788

Nucor completed its most recent annual goodwill impairment testing during the fourth quarter of 2019 and concluded that as of such time there was no impairment of goodwill for any of its reporting units.

The assessment performed in 2019 used forward-looking projections and included expected improvements in the future cash flows of one of the Company’s reporting units, Rebar Fabrication. The fair value of this reporting unit exceeded its carrying value by approximately 56% in the most recent assessment. The reporting unit’s profitability in the first nine months of 2020 significantly increased from the first nine months of 2019. We expect the 2020 operating results of the Rebar Fabrication reporting unit will continue to improve compared to 2019. If our assessment of the relevant facts and circumstances changes, or the actual performance of this reporting unit falls short of expected results, non-cash impairment charges may be required. Total goodwill associated with the Rebar Fabrication reporting unit was $352.7 million as of October 3, 2020 ($356.6 million as of December 31, 2019). An impairment of goodwill may also lead us to record an impairment of other intangible assets. Total finite-lived intangible assets associated with the Rebar Fabrication reporting unit were $59.6 million as of October 3, 2020 ($67.2 million as of December 31, 2019). There have been no triggering events requiring an interim assessment for impairment of the Rebar Fabrication reporting unit since the most recent annual goodwill impairment testing date.

Due to lower than expected operating results and anticipated changes to the Grating reporting unit’s business strategy and structure, the Company determined a triggering event occurred in the third quarter of 2019 and performed an impairment assessment. The fair value of the Grating reporting unit exceeded its carrying value by approximately 17% in that assessment. If our assessment of the relevant facts and circumstances changes, or the actual performance of this reporting unit falls short of expected results, non-cash impairment charges may be required. Total goodwill associated with the Grating reporting unit was $36.6 million as of October 3, 2020 ($36.8 million as of December 31, 2019).

Intangible assets with estimated useful lives of five to 22 years are amortized on a straight-line or accelerated basis and were comprised of the following as of October 3, 2020 and December 31, 2019 (in thousands):

	October 3, 2020				December 31, 2019
	Gross Amount		Accumulated Amortization		Gross Amount		Accumulated Amortization
Customer relationships	$	1,412,323	$	821,029	$	1,412,954	$	767,532
Trademarks and trade names		162,062		98,110		162,183		92,258
Other		63,822		40,510		63,807		36,968
	$	1,638,207	$	959,649	$	1,638,944	$	896,758

Intangible asset amortization expense in the third quarter of 2020 and 2019 was $20.7 million and $22.0 million, respectively, and was $62.9 million and $64.7 million in the first nine months of 2020 and 2019, respectively. Annual amortization expense is estimated to be $83.5 million in 2020; $82.3 million in 2021; $80.7 million in 2022; $80.0 million in 2023; and $79.2 million in 2024.

5. Equity Investments

The carrying value of our equity investments in domestic and foreign companies was $521.2 million at October 3, 2020 ($793.2 million at December 31, 2019) and is recorded in other assets in the condensed consolidated balance sheets.

NuMit

Nucor owns a 50% economic and voting interest in NuMit LLC (“NuMit”). NuMit owns 100% of the equity interest in Steel Technologies LLC, an operator of 26 sheet processing facilities located throughout the United States, Canada and

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Mexico. Nucor accounts for its investment in NuMit (on a one-month lag basis) under the equity method, as control and risk of loss are shared equally between the members of NuMit. Nucor’s investment in NuMit was $322.5 million at October 3, 2020 ($319.8 million at December 31, 2019). Nucor received distributions of $2.0 million and $27.4 million from NuMit during the first nine months of 2020 and 2019, respectively.

Duferdofin Nucor

Nucor owns a 50% economic and voting interest in Duferdofin Nucor S.r.l. (“Duferdofin Nucor”), an Italian steel manufacturer, and accounts for its investment (on a one-month lag basis) under the equity method, as control and risk of loss are shared equally between the members of Duferdofin Nucor.

Nucor’s investment in Duferdofin Nucor was $0.1 million at October 3, 2020 ($263.0 million at December 31, 2019). Nucor’s 50% share of the total net assets of Duferdofin Nucor was $128.6 million at October 3, 2020, resulting in a negative basis difference of $128.5 million. This was due to the $261.6 million impairment charge taken against the Company’s investment in Duferdofin Nucor in the first nine months of 2020 as discussed below, offset by the step-up to fair value of certain assets and liabilities attributable to Duferdofin Nucor, as well as the identification of goodwill ($86.5 million at December 31, 2019) and finite-lived intangible assets. This basis difference prior to the impairment charge, excluding the portion attributable to goodwill, was being amortized based on the remaining estimated useful lives of the various underlying net assets, as appropriate, through the first quarter of 2020. Beginning with the second quarter of 2020, the negative basis difference began amortizing based on the remaining estimated useful lives of the various underlying net assets, as appropriate. Amortization associated with the negative basis in the third quarter of 2020 was income of $1.9 million, compared to an expense of $2.2 million in the third quarter of 2019, associated with the fair value step-up. Net amortization was $1.6 million of income in the first nine months of 2020, and $6.7 million of expense in the first nine months 2019.     

As of October 3, 2020, Nucor had outstanding notes receivable of €35.0 million ($41.0 million) from Duferdofin Nucor (€35.0 million, or $39.3 million, as of December 31, 2019). The notes receivable bear interest at a rate that resets annually on September 30 to the 12-month Euro Interbank Offered Rate plus 0.75% per year. The maturity date of the principal amounts is January 31, 2022. As of October 3, 2020 and December 31, 2019, the notes receivable were classified in other assets in the condensed consolidated balance sheets. These notes were fully reserved in connection with the $261.6 million impairment charge taken against the Company’s investment in Duferdofin Nucor in the first nine months of 2020.

Nucor has issued a guarantee for its ownership percentage (50%) of Duferdofin Nucor’s borrowings under Facility A of a Structured Trade Finance Facilities Agreement (“Facility A”). The fair value of the guarantee is immaterial. In April 2018, Duferdofin Nucor amended and extended Facility A to mature on April 16, 2021. The maximum amount Duferdofin Nucor could borrow under Facility A was €160.0 million ($187.5 million) at October 3, 2020. As of October 3, 2020, there was €132.0 million ($154.7 million) outstanding under that facility (€147.0 million, or $164.9 million, as of December 31, 2019). If Duferdofin Nucor fails to pay when due any amounts for which it is obligated under Facility A, Nucor could be required to pay 50% of such amounts pursuant to and in accordance with the terms of its guarantee. Any indebtedness of Duferdofin Nucor to Nucor is effectively subordinated to the indebtedness of Duferdofin Nucor under Facility A. Nucor has not recorded any liability associated with this guarantee.

On October 2, 2020, Nucor entered into an agreement (the “Duferdofin Agreement”) to transfer its 50% economic and voting interest in Duferdofin Nucor to the owner of the remaining 50% interest. The closing of the transaction is subject to Duferdofin Nucor renegotiating the borrowings currently under Facility A, Nucor’s relief under the guarantee and other customary closing conditions, including regulatory consents. The closing of the transaction is expected to occur during the fourth quarter of 2020.  Nucor is continuing to evaluate the impact of the transaction contemplated by the Duferdofin Agreement on the financial statements, which will include foreign currency losses currently included in accumulated other comprehensive loss as outlined in Footnote 14 and other impacts.

Nucor-JFE

Nucor owns a 50% economic and voting interest in Nucor-JFE Steel Mexico, S. de R.L. de C.V. (“Nucor-JFE”), a 50-50 joint venture with JFE Steel Corporation of Japan, to build and operate a galvanized sheet steel plant in central Mexico. After delays caused by the COVID-19 pandemic, Nucor JFE is expected to begin commissioning in November of this year. Nucor accounts for its investment in Nucor-JFE (on a one-month lag basis) under the equity method, as control and risk of loss are shared equally between the members of Nucor-JFE. Nucor’s investment in Nucor-JFE was $150.3 million at October 3, 2020 ($163.2 million at December 31, 2019).

On January 16, 2019, Nucor entered into an agreement to guarantee a percentage, equal to its ownership percentage (50%), of Nucor-JFE’s borrowings under the General Financing Agreement and Promissory Note (the “JFE Facility”). The fair value of the guarantee is immaterial. Nucor’s guarantee expires on April 30, 2021. The maximum amount Nucor-JFE could borrow under the JFE Facility was $65.0 million as of October 3, 2020. The JFE Facility is uncommitted. As of October 3, 2020, there was $45.0 million outstanding under the JFE Facility (none as of December 31, 2019). If Nucor-JFE fails to pay when due any amounts for which it is obligated under the JFE Facility, Nucor could be required to pay 50% of such

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amounts pursuant to and in accordance with the terms of its guarantee. Nucor has not recorded any liability associated with this guarantee.

Nucor-JFE has other credit facilities that Nucor has agreed to guarantee. The principal amount subject to guarantee by Nucor for these other credit facilities was $25.0 million as of October 3, 2020 ($25.0 million as of December 31, 2019). The fair value of the guarantees is immaterial. If Nucor-JFE fails to pay when due any amounts for which it is obligated under the other credit facilities, Nucor could be required to pay such amounts pursuant to and in accordance with the terms of its guarantees. Nucor has not recorded any liability associated with these guarantees.

All Equity Investments

Nucor reviews its equity investments for impairment if and when circumstances indicate that a decline in fair value below their carrying amounts may have occurred. Nucor determined that a triggering event occurred in the first quarter of 2020 with respect to its equity method investment in Duferdofin Nucor due to adverse developments in the joint venture’s commercial outlook, which were and continue to be exacerbated by the COVID-19 pandemic, all of which have negatively impacted the joint venture’s strategic direction. After completing its impairment assessment, Nucor determined that the carrying amount exceeded its estimated fair value and the impairment condition was considered to be other than temporary. Therefore, Nucor recorded a $250.0 million impairment charge in the first quarter of 2020, a $5.0 million impairment charge in the second quarter of 2020, and a $6.6 million impairment charge in the third quarter of 2020 against its investment in Duferdofin Nucor. Any additional capital contributions, if necessary, that Nucor makes to Duferdofin Nucor will likely be subject to impairment. Additionally, in the first quarter of 2020 the Company fully reserved its €35.0 million ($41.0 million) outstanding note receivable from Duferdofin Nucor due to an assessment of the likelihood of collection in light of these adverse developments and its effective subordination to Facility A. These charges are included in losses on assets in the condensed consolidated statements of earnings. The assumptions that most significantly affect the fair value determination include projected cash flows and the discount rate. The Company-specific inputs for measuring fair value are considered “Level 3” or unobservable inputs that are not corroborated by market data under applicable fair value authoritative guidance, as quoted market prices are not available.

It is reasonably possible that material deviation of future performance from the estimates used in our most recent valuation could result in further impairment of our investment in Duferdofin Nucor and affect any potential liability associated with the Company’s guarantee of the indebtedness of Duferdofin Nucor as discussed above.

6. Current Liabilities

Book overdrafts, included in accounts payable in the condensed consolidated balance sheets, were $115.2 million at October 3, 2020 ($116.4 million at December 31, 2019). Dividends payable, included in accrued expenses and other current liabilities in the condensed consolidated balance sheets, were $123.0 million at October 3, 2020 ($122.9 million at December 31, 2019). Accrued vacation and holiday pay, included in salaries, wages and related accruals in the condensed consolidated balance sheets, were $121.8 million at October 3, 2020 ($106.2 million at December 31, 2019).

7. Fair Value Measurements

The following table summarizes information regarding Nucor’s financial assets and financial liabilities that were measured at fair value as of October 3, 2020 and December 31, 2019 (in thousands). Nucor does not have any non-financial assets or non-financial liabilities that are measured at fair value on a recurring basis.

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				Fair Value Measurements at Reporting Date Using
Description	Carrying Amount in Condensed Consolidated Balance Sheets			Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
As of October 3, 2020
Assets:
Cash equivalents	$	2,539,777		$	2,539,777	$	-		$	-
Short-term investments		412,401			412,401		-			-
Restricted cash and cash equivalents		131,623			131,623
Total assets	$	3,083,801		$	3,083,801	$	-		$	-
Liabilities:
Derivative contracts	$	(6,577	)	$	-	$	(6,577	)	$	-
As of December 31, 2019
Assets:
Cash equivalents	$	1,229,000		$	1,229,000	$	-		$	-
Short-term investments		300,040			300,040		-			-
Total assets	$	1,529,040		$	1,529,040	$	-		$	-
Liabilities:
Derivative contracts	$	(19,599	)	$	-	$	(19,599	)	$	-

Fair value measurements for Nucor’s cash equivalents, short-term investments and restricted cash and cash equivalents are classified under Level 1 because such measurements are based on quoted market prices in active markets for identical assets. Our short-term investments at October 3, 2020 consisted of certificates of deposit, commercial paper and corporate notes. Fair value measurements for Nucor’s derivatives 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.

The fair value of short-term and long-term debt, including current maturities, was approximately $6.28 billion at October 3, 2020 ($4.81 billion at December 31, 2019). The debt fair value estimates are classified under Level 2 because such estimates are based on readily available market prices of our debt at October 3, 2020 and December 31, 2019, or similar debt with the same maturities, ratings and interest rates.

Disclosures are required for certain assets and liabilities that are measured at fair value, but are recognized and disclosed on a nonrecurring basis in periods subsequent to initial recognition. For Nucor, our equity investment in Duferdofin Nucor was measured at fair value as a result of the impairment charges recorded in the first nine months of 2020 (see Note 5).

8. Contingencies

Nucor is subject to environmental laws and regulations established by federal, state and local authorities and, accordingly, makes provisions for the estimated costs of compliance. Of the undiscounted total of $16.6 million of accrued environmental costs at October 3, 2020 ($16.4 million at December 31, 2019), $6.3 million was classified in accrued expenses and other current liabilities ($4.1 million at December 31, 2019) and $10.3 million was classified in deferred credits and other liabilities ($12.3 million at December 31, 2019). Inherent uncertainties exist in these estimates primarily due to unknown conditions, evolving remediation technology and changing governmental regulations, legal standards and enforcement priorities.

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.

9. Stock-Based Compensation

Overview

The Company maintains the Nucor Corporation 2014 Omnibus Incentive Compensation Plan (the “Omnibus Plan”) under which the Company may award stock-based compensation to key employees, officers and non-employee directors. The Company’s stockholders approved an amendment and restatement of the Omnibus Plan on May 14, 2020. The

9

Omnibus Plan permits the award of stock options, restricted stock units, restricted shares and other stock-based awards for up to 19.0 million shares of the Company’s common stock. As of October 3, 2020, 7.8  million shares remained available for award under the Omnibus Plan.

The Company also maintains a number of inactive plans under which stock-based awards remain outstanding but no further awards may be made. As of October 3, 2020, 1.0 million shares were reserved for issuance upon the future settlement of outstanding awards under such inactive plans.

Stock Options

Stock options may be granted to Nucor’s key employees, officers and non-employee directors with exercise prices at 100% of the market value on the date of the grant. The stock options granted are generally exercisable at the end of three years and have a term of 10 years.

A summary of activity under Nucor’s stock option plans for the first nine months of 2020 is as follows (shares 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		3,892		$	50.78
Granted		529		$	42.46
Exercised		-		$	-		$	-
Canceled		(239	)	$	51.58
Outstanding at October 3, 2020		4,182		$	49.68	6.0 years	$	3,846
Stock options exercisable at October 3, 2020		3,435		$	50.36	5.3 years	$	2,189

Stock options granted to employees who are eligible for retirement on the date of the grant are expensed immediately since these awards vest upon retirement from the Company. Retirement, for purposes of vesting in these stock options, means termination of employment after satisfying age and years of service requirements. Similarly, stock options granted to employees who will become retirement-eligible prior to the end of the vesting term are expensed over the period through which the employee will become retirement-eligible. Compensation expense for stock options granted to employees who will not become retirement-eligible prior to the end of the vesting term is recognized on a straight-line basis over the vesting period. Compensation expense for stock options was $0.3 million in the third quarter of both 2020 and 2019 and $2.4 million and $4.4 million in the first nine months of 2020 and 2019, respectively. As of October 3, 2020, unrecognized compensation expense related to stock options was $2.8 million, which is expected to be recognized over a weighted-average period of 2.4 years.

Restricted Stock Units

Nucor annually grants restricted stock units (“RSUs”) to key employees, officers and non-employee directors. The RSUs granted to key employees and officers vest and are converted to common stock in three equal installments on each of the first three anniversaries of the grant date provided that a portion of the RSUs awarded to an officer prior to 2018 vest only upon the officer’s retirement. Retirement, for purposes of vesting in these RSUs only, means termination of employment with approval of the Compensation and Executive Development Committee of the Board of Directors after satisfying age and years of service requirements. RSUs granted to a non-employee director are fully vested on the grant date and are payable to the non-employee director in the form of common stock after the termination of the director’s service on the Board of Directors.

RSUs granted to employees who are eligible for retirement on the date of the grant are expensed immediately, and RSUs granted to employees who will become retirement-eligible prior to the end of the vesting term are expensed over the period through which the employee will become retirement-eligible since these awards vest upon retirement from the Company. Compensation expense for RSUs granted to employees who will not become retirement-eligible prior to the end of the vesting term is recognized on a straight-line basis over the vesting period.

Cash dividend equivalents are paid to holders of RSUs each quarter. Dividend equivalents paid on RSUs expected to vest are recognized as a reduction in retained earnings.

The fair value of an RSU is determined based on the closing price of Nucor’s common stock on the date of the grant.

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A summary of Nucor’s RSU activity for the first nine months of 2020 is as follows (shares in thousands):

	Shares			Grant Date Fair Value
Restricted stock units:
Unvested at beginning of year		1,776		$	52.60
Granted		1,246		$	42.46
Vested		(1,140	)	$	50.14
Canceled		(22	)	$	50.17
Unvested at October 3, 2020		1,860		$	47.34

Compensation expense for RSUs was $11.1 million and $11.0 million in the third quarter of 2020 and 2019, respectively, and $47.9 million and $59.1 million in the first nine months of 2020 and 2019, respectively. As of October 3, 2020, unrecognized compensation expense related to unvested RSUs was $64.2 million, which is expected to be recognized over a weighted-average period of 1.5 years.

Restricted Stock Awards

Prior to their expiration effective December 31, 2017, the Nucor Corporation Senior Officers Long-Term Incentive Plan and the Nucor Corporation Senior Officers Annual Incentive Plan authorized the award of shares of common stock to officers subject to certain conditions and restrictions. Effective January 1, 2018, the Company adopted supplements to the Omnibus Plan with terms that permit the award of shares of common stock to officers subject to the conditions and restrictions described below, which are substantially similar to those of the expired Senior Officers Long-Term Incentive Plan and Senior Officers Annual Incentive Plan. The expired Senior Officers Long-Term Incentive Plan, together with the applicable supplement, is referred to below as the “LTIP,” and the expired Senior Officers Annual Incentive Plan, together with the applicable supplement, is referred to below as the “AIP.”

The LTIP provides for the award of shares of restricted common stock at the end of each LTIP performance measurement period at no cost to officers if certain financial performance goals are met during the period. One-third of the LTIP restricted stock award vests upon each of the first three anniversaries of the award date or, if earlier, upon the officer’s attainment of age 55 while employed by Nucor. Although participants are entitled to cash dividends and may vote such awarded shares, the sale or transfer of such shares is limited during the restricted period.

The AIP provides for the payment of annual cash incentive awards. An AIP participant may elect, however, to defer payment of up to one-half of an AIP award. In such event, the deferred AIP award is converted into common stock units and credited with a deferral incentive, in the form of additional common stock units, equal to 25% of the number of common stock units attributable to the deferred AIP award. Common stock units attributable to deferred AIP awards are fully vested. Common stock units credited as a deferral incentive vest upon the AIP participant’s attainment of age 55 while employed by Nucor. Vested common stock units are paid to AIP participants in the form of shares of common stock following their termination of employment with Nucor.

A summary of Nucor’s restricted stock activity under the AIP and the LTIP for the first nine months of 2020 is as follows (shares in thousands):

				Grant Date
	Shares			Fair Value
Restricted stock units and restricted stock awards:
Unvested at beginning of year		147		$	60.81
Granted		348		$	36.15
Vested		(359	)	$	40.98
Canceled		-		$	-
Unvested at October 3, 2020		136		$	49.98

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 $3.3 million and $1.8 million in the third quarter of 2020 and 2019, respectively, and $5.8 million and $10.9 million in the first nine months of 2020 and 2019, respectively. As of October 3, 2020, unrecognized compensation expense related to unvested restricted stock awards was $1.6 million, which is expected to be recognized over a weighted-average period of 1.6 years.

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10. 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 $27.5 million and $40.0 million in the third quarter of 2020 and 2019, respectively, and $59.5 million and $163.7 million in the first nine months of 2020 and 2019, respectively. The related liability for these benefits is included in salaries, wages and related accruals in the condensed consolidated balance sheets.

11. Interest Expense (Income):

The components of net interest expense for the third quarter and first nine months of 2020 and 2019 are as follows (in thousands):

	Three Months (13 Weeks) Ended						Nine Months (39 Weeks) Ended
	Oct. 3, 2020			Sept. 28, 2019			Oct. 3, 2020			Sept. 28, 2019
Interest expense	$	42,281		$	40,721		$	128,726		$	119,736
Interest income		(2,142	)		(9,435	)		(11,870	)		(26,977	)
Interest expense, net	$	40,139		$	31,286		$	116,856		$	92,759

12. Income Taxes

The effective tax rate for the third quarter of 2020 was 23.3% as compared to 22.8% for the third quarter of 2019.

Nucor has concluded U.S. federal income tax matters for years through 2016, other than 2015. The tax years 2015 and 2017 through 2019 remain open to examination by the Internal Revenue Service. The 2015 Canadian income tax returns for Harris Steel Group Inc. and certain related affiliates are currently under examination by the Canada Revenue Agency. The tax years 2013 through 2019 remain open to examination by other major taxing jurisdictions to which Nucor is subject (primarily Canada and other state and local jurisdictions). From time to time in the ordinary course of business, Nucor is involved in tax disputes with federal, state and local taxing jurisdictions, which are, individually and in the aggregate, immaterial to Nucor.

Non-current deferred tax liabilities included in deferred credits and other liabilities in the condensed consolidated balance sheets were $575.2 million at October 3, 2020 ($431.0 million at December 31, 2019).

13. Stockholders’ Equity

The following tables reflect the changes in stockholders’ equity attributable to both Nucor and the noncontrolling interests of Nucor’s joint ventures, primarily Nucor-Yamato Steel Company (Limited Partnership) of which Nucor owns 51%, for the three months and nine months ended October 3, 2020 and September 28, 2019 (in thousands):

				Three Months (13 Weeks) Ended October 3, 2020
													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 4, 2020	$	10,623,485			380,154	$	152,061	$	2,106,907	$	10,998,533		$	(340,836	)		78,259		$	(2,721,845	)	$	10,194,820		$	428,665
Net earnings		222,630			-		-		-		193,415			-			-			-			193,415			29,215
Other comprehensive income (loss)		25,367			-		-		-		-			25,367			-			-			25,367			-
Stock option expense		263			-		-		263		-			-			-			-			263			-
Issuance of stock under award    plans, net of forfeitures		11,189			-		-		10,012		-			-			(34	)		1,177			11,189			-
Amortization of unearned    compensation		400			-		-		400		-			-			-			-			400			-
Cash dividends declared		(123,039	)		-		-		-		(123,039	)		-			-			-			(123,039	)		-
Distributions to noncontrolling    interests		(43,228	)		-		-		-		-			-			-			-			-			(43,228	)
Other		-			-		-		-		(1	)		-			-			-			(1	)		1
BALANCES, October 3, 2020	$	10,717,067			380,154	$	152,061	$	2,117,582	$	11,068,908		$	(315,469	)		78,225		$	(2,720,668	)	$	10,302,414		$	414,653

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				Nine Months (39 Weeks) Ended October 3, 2020
													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, 2019	$	10,791,176			380,154	$	152,061	$	2,107,646	$	11,115,056		$	(302,966	)		78,342		$	(2,713,931	)	$	10,357,866		$	433,310
Net earnings		410,162			-		-		-		322,627			-			-			-			322,627			87,535
Other comprehensive income (loss)		(12,503	)		-		-		-		-			(12,503	)		-			-			(12,503	)		-
Stock option expense		2,402			-		-		2,402		-			-			-			-			2,402			-
Issuance of stock under award    plans, net of forfeitures		38,996			-		-		6,234		-			-			(942	)		32,762			38,996			-
Amortization of unearned    compensation		1,300			-		-		1,300		-			-			-			-			1,300			-
Treasury stock acquired		(39,499	)		-		-		-		-			-			825			(39,499	)		(39,499	)		-
Cash dividends declared		(368,774	)		-		-		-		(368,774	)		-			-			-			(368,774	)		-
Distributions to noncontrolling    interests		(106,193	)		-		-		-		-			-			-			-			-			(106,193	)
Other		-			-		-		-		(1	)		-			-			-			(1	)		1
BALANCES, October 3, 2020	$	10,717,067			380,154	$	152,061	$	2,117,582	$	11,068,908		$	(315,469	)		78,225		$	(2,720,668	)	$	10,302,414		$	414,653

				Three Months (13 Weeks) Ended September 28, 2019
														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, 2019	$	10,698,008			380,154	$	152,061	$	2,098,809		$	10,977,950		$	(297,760	)		76,997		$	(2,630,343	)	$	10,300,717		$	397,291
Net earnings		293,587			-		-		-			275,031			-			-			-			275,031			18,556
Other comprehensive income (loss)		(16,006	)		-		-		-			-			(16,006	)		-			-			(16,006	)		-
Stock option expense		275			-		-		275			-			-			-			-			275			-
Issuance of stock under award    plans, net of forfeitures		11,339			-		-		9,365			-			-			(58	)		1,974			11,339			-
Amortization of unearned    compensation		500			-		-		500			-			-			-			-			500			-
Cash dividends declared		(122,809	)		-		-		-			(122,809	)		-			-			-			(122,809	)		-
Distributions to noncontrolling    interests		(3,861	)		-		-		-			-			-			-			-			-			(3,861	)
Other		-			-		-		(1	)		-			-			-			1			-			-
BALANCES, September 28, 2019	$	10,861,033			380,154	$	152,061	$	2,108,948		$	11,130,172		$	(313,766	)		76,939		$	(2,628,368	)	$	10,449,047		$	411,986

				Nine Months (39 Weeks) Ended September 28, 2019
														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, 2018	$	10,201,968			380,154	$	152,061	$	2,073,715		$	10,337,445		$	(304,133	)		74,562		$	(2,467,010	)	$	9,792,078		$	409,890
Net earnings		1,236,657			-		-		-			1,163,320			-			-			-			1,163,320			73,337
Other comprehensive income (loss)		(11,519	)		-		-		-			-			(11,519	)		-			-			(11,519	)		-
Stock options exercised		5,892			-		-		808			-			-			(153	)		5,084			5,892			-
Stock option expense		4,387			-		-		4,387			-			-			-			-			4,387			-
Issuance of stock under award    plans, net of forfeitures		59,608			-		-		28,540			-			-			(920	)		31,068			59,608			-
Amortization of unearned    compensation		1,500			-		-		1,500			-			-			-			-			1,500			-
Treasury stock acquired		(197,511	)		-		-		-			-			-			3,450			(197,511	)		(197,511	)		-
Cash dividends declared		(368,707	)		-		-		-			(368,707	)		-			-			-			(368,707	)		-
Distributions to noncontrolling    interests		(71,241	)		-		-		-			-			-			-			-			-			(71,241	)
Other		(1	)		-		-		(2	)		(1,886	)		1,886			-			1			(1	)		-
BALANCES, September 28, 2019	$	10,861,033			380,154	$	152,061	$	2,108,948		$	11,130,172		$	(313,766	)		76,939		$	(2,628,368	)	$	10,449,047		$	411,986

Dividends declared per share were $0.4025 per share in the third quarter of 2020 ($0.40 per share in the third quarter of 2019) and $1.2075 per share in the first nine months of 2020 ($1.20 per share in the first nine months of 2019).

On September 6, 2018, the Company announced that the Board of Directors had approved a new share repurchase program under which the Company is authorized to repurchase up to $2.00 billion of the Company’s common stock and terminated any previously authorized share repurchase programs. Share repurchases will be 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 October 3, 2020, the Company had approximately $1.16 billion remaining available for share repurchases under the program.

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14. 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 October 3, 2020 and September 28, 2019 (in thousands):

	Three-Month (13-Week) Period Ended
	October 3, 2020
	Gains and Losses on			Foreign Currency			Adjustment to Early
	Hedging Derivatives			Gain (Loss)			Retiree Medical Plan		Total
Accumulated other comprehensive    income (loss) at July 4, 2020	$	(10,900	)	$	(337,743	)	$	7,807	$	(340,836	)
Other comprehensive income (loss)    before reclassifications		6,387			16,867			-		23,254
Amounts reclassified from accumulated    other comprehensive income (loss)    into earnings (1)		2,113			-			-		2,113
Net current-period other comprehensive    income (loss)		8,500			16,867			-		25,367
Accumulated other comprehensive    income (loss) at October 3, 2020	$	(2,400	)	$	(320,876	)	$	7,807	$	(315,469	)

	Nine-Month (39-Week) Period Ended
	October 3, 2020
	Gains and Losses on			Foreign Currency			Adjustment to Early
	Hedging Derivatives			Gain (Loss)			Retiree Medical Plan		Total
Accumulated other comprehensive    income (loss) at December 31, 2019	$	(14,000	)	$	(296,773	)	$	7,807	$	(302,966	)
Other comprehensive income (loss) before    reclassifications		4,888			(24,103	)		-		(19,215	)
Amounts reclassified from accumulated    other comprehensive income (loss)    into earnings (1)		6,712			-			-		6,712
Net current-period other comprehensive income    (loss)		11,600			(24,103	)		-		(12,503	)
Accumulated other comprehensive    income (loss) at October 3, 2020	$	(2,400	)	$	(320,876	)	$	7,807	$	(315,469	)

(1)   Includes $2,113 and $6,712 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 2020, respectively. The tax impacts of those reclassifications were $700 and $2,300 in the third quarter and first nine months of 2020, respectively.

Included in the $320.9 million foreign currency losses at October 3, 2020 are $191.5 million of losses related to our equity method investment in Duferdofin Nucor and $129.4 million of losses related primarily to our Canadian operations.

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	Three-Month (13-Week) Period Ended
	September 28, 2019
	Gains and Losses on			Foreign Currency			Adjustment to Early
	Hedging Derivatives			Gain (Loss)			Retiree Medical Plan		Total
Accumulated other comprehensive    income (loss) at June 29, 2019	$	(11,100	)	$	(295,559	)	$	8,899	$	(297,760	)
Other comprehensive income (loss)    before reclassifications		(3,315	)		(14,306	)		-		(17,621	)
Amounts reclassified from accumulated    other comprehensive income (loss)    into earnings (1)		1,615			-			-		1,615
Net current-period other comprehensive    income (loss)		(1,700	)		(14,306	)		-		(16,006	)
Accumulated other comprehensive    income (loss) at September 28, 2019	$	(12,800	)	$	(309,865	)	$	8,899	$	(313,766	)

	Nine-Month (39-Week) Period Ended
	September 28, 2019
	Gains and Losses on			Foreign Currency			Adjustment to Early
	Hedging Derivatives			Gain (Loss)			Retiree Medical Plan		Total
Accumulated other comprehensive    income (loss) at December 31, 2018	$	(6,500	)	$	(304,646	)	$	7,013	$	(304,133	)
Other comprehensive income (loss) before    reclassifications		(7,801	)		(5,219	)		-		(13,020	)
Amounts reclassified from accumulated    other comprehensive income (loss)    into earnings (1)		1,501			-			-		1,501
Net current-period other comprehensive income    (loss)		(6,300	)		(5,219	)		-		(11,519	)
Other		-			-			1,886		1,886
Accumulated other comprehensive    income (loss) at September 28, 2019	$	(12,800	)	$	(309,865	)	$	8,899	$	(313,766	)

(1)   Includes $1,615 and $1,501 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 2019, respectively. The tax impacts of those reclassifications were $500 in both the third quarter and first nine months of 2019.

15. 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 businesses; rebar distribution businesses; and Nucor’s equity method investments in Duferdofin Nucor, NuMit and Nucor-JFE. 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, steel grating, tubular products businesses, piling products business, and wire and wire mesh. The raw materials segment includes The David J. Joseph Company and its affiliates (collectively, “DJJ”), primarily a scrap broker and processor; Nu-Iron Unlimited and Nucor Steel Louisiana LLC, two facilities that produce direct reduced iron (“DRI”) used by the steel mills; and our natural gas production operations.

Net interest expense on long-term debt, charges and credits associated with changes in allowances to eliminate intercompany profit in inventory, profit sharing expense and stock-based compensation are shown under Corporate/eliminations. Corporate assets primarily include cash and cash equivalents, short-term investments, allowances to eliminate intercompany profit in inventory, deferred income tax assets, federal and state income taxes receivable and investment in and advances to affiliates.

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Nucor’s results by segment for the third quarter and first nine months of 2020 and 2019 were as follows (in thousands):

	Three Months (13 Weeks) Ended					Nine Months (39 Weeks) Ended
	Oct. 3, 2020		Sept. 28, 2019			Oct. 3, 2020		Sept. 28, 2019
Net sales to external customers:
Steel mills	$	2,842,625	$	3,244,473		$	8,875,856	$	10,897,322
Steel products		1,738,004		1,820,359			4,988,026		5,225,064
Raw materials		347,331		399,670			1,015,721		1,334,726
	$	4,927,960	$	5,464,502		$	14,879,603	$	17,457,112
Intercompany sales:
Steel mills	$	731,942	$	825,237		$	2,264,278	$	2,542,008
Steel products		51,029		57,517			197,603		174,718
Raw materials		1,863,796		2,063,167			5,772,583		6,917,523
Corporate/eliminations		(2,646,767)		(2,945,921	)		(8,234,464)		(9,634,249	)
	$	-	$	-		$	-	$	-
Earnings (loss) before income taxes and    noncontrolling interests:
Steel mills	$	205,152	$	309,939		$	512,082	$	1,578,257
Steel products		186,976		170,214			502,409		363,731
Raw materials		6,232		(10,599	)		(3,068)		64,333
Corporate/eliminations		(107,942)		(89,215	)		(393,651)		(401,744	)
	$	290,418	$	380,339		$	617,772	$	1,604,577

	Oct. 3, 2020		Dec. 31, 2019
Segment assets:
Steel mills	$	9,251,790	$	9,283,216
Steel products		4,399,501		4,610,628
Raw materials		3,172,464		3,316,479
Corporate/eliminations		2,695,522		1,134,343
	$	19,519,277	$	18,344,666

16. Revenue

The following tables disaggregate our revenue by major source for the third quarter and first nine months of 2020 and 2019 (in thousands):

	Three Months (13 Weeks) Ended October 3, 2020								Nine Months (39 Weeks) Ended October 3, 2020
	Steel Mills		Steel Products		Raw Materials		Total		Steel Mills		Steel Products		Raw Materials		Total
Sheet	$	1,256,537	$	-	$	-	$	1,256,537	$	3,899,970	$	-	$	-	$	3,899,970
Bar		957,216		-		-		957,216		2,830,936		-		-		2,830,936
Structural		362,192		-		-		362,192		1,159,949		-		-		1,159,949
Plate		266,680		-		-		266,680		985,001		-		-		985,001
Tubular Products		-		274,915		-		274,915		-		830,283		-		830,283
Rebar Fabrication		-		463,286		-		463,286		-		1,300,518		-		1,300,518
Other Steel Products		-		999,803		-		999,803		-		2,857,225		-		2,857,225
Raw Materials		-		-		347,331		347,331		-		-		1,015,721		1,015,721
	$	2,842,625	$	1,738,004	$	347,331	$	4,927,960	$	8,875,856	$	4,988,026	$	1,015,721	$	14,879,603

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	Three Months (13 Weeks) Ended September 28, 2019								Nine Months (39 Weeks) Ended September 28, 2019
	Steel Mills		Steel Products		Raw Materials		Total		Steel Mills		Steel Products		Raw Materials		Total
Sheet	$	1,513,884	$	-	$	-	$	1,513,884	$	5,071,027	$	-	$	-	$	5,071,027
Bar		979,082		-		-		979,082		3,173,289		-		-		3,173,289
Structural		378,670		-		-		378,670		1,214,355		-		-		1,214,355
Plate		372,837		-		-		372,837		1,438,651		-		-		1,438,651
Tubular Products		-		296,519		-		296,519		-		919,711		-		919,711
Rebar Fabrication		-		469,180		-		469,180		-		1,249,912		-		1,249,912
Other Steel Products		-		1,054,660		-		1,054,660		-		3,055,441		-		3,055,441
Raw Materials		-		-		399,670		399,670		-		-		1,334,726		1,334,726
	$	3,244,473	$	1,820,359	$	399,670	$	5,464,502	$	10,897,322	$	5,225,064	$	1,334,726	$	17,457,112

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 $114.3 million as of October 3, 2020 ($108.6 million as of December 31, 2019), and are included in accrued expenses and other current liabilities in the condensed consolidated balance sheets.

17. Earnings Per Share

The computations of basic and diluted net earnings per share for the third quarter and first nine months of 2020 and 2019 are as follows (in thousands, except per share amounts):

	Three Months (13 Weeks) Ended						Nine Months (39 Weeks) Ended
	Oct. 3, 2020			Sept. 28, 2019			Oct. 3, 2020			Sept. 28, 2019
Basic net earnings per share:
Basic net earnings	$	193,415		$	275,031		$	322,627		$	1,163,320
Earnings allocated to participating securities		(1,201	)		(1,655	)		(2,182	)		(6,295	)
Net earnings available to common stockholders	$	192,214		$	273,376		$	320,445		$	1,157,025
Basic average shares outstanding		303,394			304,637			303,072			305,553
Basic net earnings per share	$	0.63		$	0.90		$	1.06		$	3.79
Diluted net earnings per share:
Diluted net earnings	$	193,415		$	275,031		$	322,627		$	1,163,320
Earnings allocated to participating securities		(1,202	)		(1,656	)		(2,182	)		(6,295	)
Net earnings available to common stockholders	$	192,213		$	273,375		$	320,445		$	1,157,025
Diluted average shares outstanding:
Basic average shares outstanding		303,394			304,637			303,072			305,553
Dilutive effect of stock options and other		47			343			27			476
		303,441			304,980			303,099			306,029
Diluted net earnings per share	$	0.63		$	0.90		$	1.06		$	3.78

The following stock options were excluded from the computation of diluted net earnings per share for the third quarter and first nine months of 2020 and 2019 because their effect would have been anti-dilutive (shares in thousands):

	Three Months (13 Weeks) Ended				Nine Months (39 Weeks) Ended
	Oct. 3, 2020		Sept. 28, 2019		Oct. 3, 2020		Sept. 28, 2019
Anti-dilutive stock options:
Weighted-average shares		3,463		963		3,638		963
Weighted-average exercise price	$	51.38	$	60.92	$	51.15	$	60.92

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18. Restricted Cash and Cash Equivalents

As of October 3, 2020, restricted cash and cash equivalents totaled $131.6 million, and primarily consisted of net proceeds from the issuance of $162.6 million in 40-year variable-rate Green Bonds in July 2020. The restricted cash and cash equivalents are held in a trust account and are to be used to partially fund the capital costs, in particular the expenditures associated with pollution prevention and control including waste recycling, associated with the construction of Nucor’s plate mill located in Brandenburg, Kentucky. Funds are disbursed from the trust account as qualified expenditures for the construction of the Brandenburg facility are made ($31.0 million in the third quarter of 2020). Interest earned on funds held in the trust account is subject to the same usage requirements as the bond proceeds principle. Since the restricted cash and interest and dividends must be used for the construction of the Brandenburg facility and relate to a long-term liability, the entire balance has been classified as a non-current asset.

19. Debt

In May 2020, Nucor issued $500.0 million of 2.000% Notes due 2025 and $500.0 million of 2.700% Notes due 2030. Net proceeds of the issuances were $989.4 million. Costs of $8.4 million associated with the issuances have been capitalized and will be amortized over the life of the notes.

In July 2020, Nucor became an obligor with respect to $162.6 million in 40-year variable-rate Green Bonds to partially fund the capital costs, in particular the expenditures associated with pollution prevention and control including waste recycling, associated with the construction of Nucor’s plate mill located in Brandenburg, Kentucky. The net proceeds from the debt issuance are being held in a trust account pending disbursement for the construction of the facility.

20. Subsequent Event

Subsequent to the end of the third quarter of 2020, we received certification of state income tax credits that will result in an approximately $40 million net benefit to our provision for income taxes in the fourth quarter of 2020.

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

Certain statements made in this Quarterly Report on Form 10-Q, or in other public filings, press releases, or other written or oral communications made by Nucor, which are not historical facts are forward-looking statements subject to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. These forward-looking statements involve risks and uncertainties which we expect will or may occur in the future and may impact our business, financial condition and results of operations. The words “anticipate,” “believe,” “expect,” “project,” “may,” “will,” “should,” “could” and similar expressions are intended to identify those forward-looking statements. These forward-looking statements reflect the Company’s best judgment based on current information, and, although we base these statements on circumstances that we believe to be reasonable when made, there can be no assurance that future events will not affect the accuracy of such forward-looking information. As such, the forward-looking statements are not guarantees of future performance, and actual results may vary materially from the projected results and expectations discussed in this report. Factors that might cause the Company’s actual results to differ materially from those anticipated in forward-looking statements include, but are not limited to: (1) competitive pressure on sales and pricing, including pressure from imports and substitute materials; (2) U.S. and foreign trade policies affecting steel imports or exports; (3) the sensitivity of the results of our operations to prevailing market steel prices and changes in the supply and cost of raw materials, including pig iron, iron ore and scrap steel; (4) the availability and cost of electricity and natural gas which could negatively affect our cost of steel production or result in a delay or cancellation of existing or future drilling within our natural gas drilling programs; (5) critical equipment failures and business interruptions; (6) market demand for steel products, which, in the case of many of our products, is driven by the level of nonresidential construction activity in the United States, as well as prevailing domestic prices for oil and gas; (7) impairment in the recorded value of inventory, equity investments, fixed assets, goodwill or other long-lived assets; (8) uncertainties surrounding the global economy, including excess world capacity for steel production; (9) fluctuations in currency conversion rates; (10) significant changes in laws or government regulations affecting environmental compliance, including legislation and regulations that result in greater regulation of greenhouse gas emissions that could increase our energy costs and our capital expenditures and operating costs or cause one or more of our permits to be revoked or make it more difficult to obtain permit modifications; (11) the cyclical nature of the steel industry; (12) capital investments and their impact on our performance; (13) our safety performance; (14) the impact of the COVID-19 pandemic; and (15) the risks discussed in “Item 1A. Risk Factors” of the Company’s Annual Report on Form 10-K for the year ended December 31, 2019 and in “Item 1A. Risk Factors” of this report and elsewhere herein.

Caution should be taken not to place undue reliance on the forward-looking statements included in this report. We assume no obligation to update any forward-looking statements except as may be required by law. In evaluating forward-looking statements, these risks and uncertainties should be considered, together with the other risks described from time to time in our reports and other filings with the Securities and Exchange Commission.

The following discussion and analysis of our financial condition and results of operations should be read in conjunction with the unaudited condensed consolidated financial statements and the notes thereto and “Item 1A. Risk Factors” included elsewhere in this report, as well as the audited consolidated financial statements and the notes thereto, “Item 1A. Risk Factors” and “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” contained in Nucor’s Annual Report on Form 10-K for the year ended December 31, 2019.

Overview

Nucor and its affiliates manufacture steel and steel products. Nucor also produces DRI for use in its steel mills. Through DJJ, the Company also processes ferrous and nonferrous metals and brokers ferrous and nonferrous metals, pig iron, hot briquetted iron and DRI. Most of Nucor’s operating facilities and customers are located in North America. Nucor’s operations include international trading and sales companies that buy and sell steel and steel products manufactured by the Company and others. Nucor is North America’s largest recycler, using scrap steel as the primary raw material in producing steel and steel products.

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 businesses; rebar distribution businesses; and Nucor’s equity method investments in Duferdofin Nucor, NuMit and Nucor-JFE. 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, steel grating, tubular products businesses, piling products business, and wire and wire mesh. The raw materials segment includes DJJ, primarily a scrap broker and processor; Nu-Iron Unlimited and NSLA, two facilities that produce DRI used by the steel mills; and our natural gas production operations.

The average utilization rates of all operating facilities in the steel mills, steel products and raw materials segments were approximately 80%, 71% and 65%, respectively, in the first nine months of 2020 compared with approximately 85%, 71% and 70%, respectively, in the first nine months of 2019.

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COVID-19 Update

The COVID-19 pandemic continues to impact Nucor’s operations and we believe it is currently the most significant ongoing event impacting almost all aspects of our business. Our most important value is the health and safety of our teammates, their families and the communities where we operate. We have formed several internal task forces to closely monitor developments related to the pandemic and provide guidance to Nucor facilities. Our facilities around the country are each taking steps to respond to COVID-19 based on the nature of their operations and the actions being taken by their state and local governments. We have restricted travel, upgraded the cleaning practices at our facilities and offices, implemented remote work arrangements for teammates wherever possible, and instituted social distancing measures throughout the Company. Across Nucor, we remain committed to protecting our teammates while minimizing disruptions to our customers and supply chain.

Results of Operations

Nucor reported net earnings of $193.4 million, or $0.63 per diluted share, for the third quarter of 2020 and $322.6 million, or $1.06 per diluted share, for the first nine months of 2020. These are significant decreases when compared to the respective prior year periods in which we reported net earnings of $275.0 million, or $0.90 per diluted share, for the third quarter of 2019 and $1.16 billion, or $3.78 per diluted share, for the first nine months of 2019. The major factor driving the decreased 2020 performance has been the ongoing COVID-19 pandemic that began to impact the domestic economy and our business late in the first quarter of 2020.

Third quarter of 2020 net earnings of $193.4 million, or $0.63 per diluted share, is an increase compared to the second quarter of 2020 net earnings of $108.9 million, or $0.36 per diluted share. Utilization rates rebounded in the third quarter of 2020 as compared to the second quarter of 2020. The average utilization rates of all operating facilities in the steel mills, steel products and raw materials segments were approximately 83%, 75% and 69%, respectively, in the third quarter of 2020 compared with approximately 68%, 66% and 51%, respectively, in the second quarter of 2020. Nonresidential construction markets have been resilient during the pandemic and remained strong in the third quarter of 2020. The strength of nonresidential construction markets in the third quarter of 2020 benefited our bar and structural mills in the steel mills segment and spurred our steel products segment to another strong quarter. Market conditions for our sheet and plate mills in the steel mills segment remained challenged in the third quarter of 2020, but we currently expect improved performance in the fourth quarter of 2020 due to positive pricing momentum in sheet and plate markets.

The following discussion will provide greater quantitative and qualitative analysis of Nucor’s performance in the third quarter and first nine months of 2020 as compared to the respective prior year periods.

Net Sales

Net sales to external customers by segment for the third quarter and first nine months of 2020 and 2019 were as follows (in thousands):

	Three Months (13 Weeks) Ended			Nine Months (39 Weeks) Ended
	Oct. 3, 2020	Sept. 28, 2019	% Change	Oct. 3, 2020	Sept. 28, 2019	% Change
Steel mills	$2,842,625	$3,244,473	-12%	$8,875,856	$10,897,322	-19%
Steel products	1,738,004	1,820,359	-5%	4,988,026	5,225,064	-5%
Raw materials	347,331	399,670	-13%	1,015,721	1,334,726	-24%
Total net sales	$4,927,960	$5,464,502	-10%	$14,879,603	$17,457,112	-15%

Net sales for the third quarter of 2020 decreased 10% from the third quarter of 2019. Average sales price per ton decreased 7% from $834 in the third quarter of 2019 to $774 in the third quarter of 2020. Total tons shipped to outside customers in the third quarter of 2020 were 6,367,000 tons, a 3% decrease from the third quarter of 2019.

Net sales for the first nine months of 2020 decreased 15% from the first nine months of 2019. Average sales price per ton decreased 10% from $871 in the first nine months of 2019 to $782 in the first nine months of 2020. Total tons shipped to outside customers in the first nine months of 2020 were 19,033,000 tons, a 5% decrease from the first nine months of 2019.

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In the steel mills segment, sales tons for the third quarter and first nine months of 2020 and 2019 were as follows (in thousands):

	Three Months (13 Weeks) Ended			Nine Months (39 Weeks) Ended
	Oct. 3, 2020	Sept. 28, 2019	% Change	Oct. 3, 2020	Sept. 28, 2019	% Change
Outside steel shipments	4,442	4,559	-3%	13,382	14,013	-5%
Inside steel shipments	1,184	1,229	-4%	3,511	3,564	-1%
Total steel shipments	5,626	5,788	-3%	16,893	17,577	-4%

Net sales for the steel mills segment decreased 12% in the third quarter of 2020 from the third quarter of 2019, due primarily to a 10% decrease in the average sales price per ton from $711 to $639 and a 3% decrease in tons sold to outside customers. Average selling prices decreased across all product groups within the steel mills segment in the third quarter of 2020 as compared to the third quarter of 2019.

Net sales for the steel mills segment decreased 19% in the first nine months of 2020 from the first nine months of 2019, due to a 14% decrease in the average sales price per ton and a 5% decrease in tons sold to outside customers.

Outside sales tonnage for the steel products segment for the third quarter and first nine months of 2020 and 2019 was as follows (in thousands):

	Three Months (13 Weeks) Ended			Nine Months (39 Weeks) Ended
	Oct. 3, 2020	Sept. 28, 2019	% Change	Oct. 3, 2020	Sept. 28, 2019	% Change
Joist	153	133	15%	406	359	13%
Deck	129	132	-2%	365	354	3%
Cold finish	99	116	-15%	300	390	-23%
Rebar fabrication	328	342	-4%	948	929	2%
Piling products	186	160	16%	522	462	13%
Tubular products	280	272	3%	816	780	5%
Other steel products	92	107	-14%	278	303	-8%
Total steel products	1,267	1,262	-	3,635	3,577	2%

Net sales for the steel products segment decreased 5% in the third quarter of 2020 compared to the third quarter of 2019, due to a 5% decrease in the average sales price per ton from $1,442 to $1,371. Average selling prices decreased across all businesses within the steel products segment in the third quarter of 2020 as compared to the third quarter of 2019.

Net sales for the steel products segment decreased 5% in the first nine months of 2020 compared to the first nine months of 2019, due primarily to a 6% decrease in the average sales price per ton from $1,461 to $1,372 which was partially offset by a 2% increase in tons sold to outside customers. Average selling prices decreased across most businesses within the steel products segment in the first nine months of 2020 as compared to the first nine months of 2019, with the exception being our rebar fabrication business.

Net sales for the raw materials segment decreased 13% and 24% in the third quarter and first nine months of 2020, respectively, from the same prior year periods. The decreases were primarily due to decreased average selling prices at DJJ’s brokerage operations and decreased volumes at both DJJ’s scrap processing and brokerage operations. In the third quarter of 2020, approximately 89% of outside sales for the raw materials segment were from the brokerage operations of DJJ, and approximately 9% of outside sales were from the scrap processing operations of DJJ (89% and 10%, respectively, in the third quarter of 2019). In the first nine months of 2020, approximately 89% of outside sales for the raw materials segment were from the brokerage operations of DJJ, and approximately 9% of outside sales were from the scrap processing operations of DJJ (90% and 9%, respectively, in the first nine months of 2019).

Gross Margins

Nucor recorded gross margins of $502.2 million (10%) in the third quarter of 2020 and $572.5 million (10%) in the third quarter of 2019.

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• The primary driver for the decrease in gross margins in the third quarter of 2020 as compared to the third quarter of 2019 was decreased metal margin in the steel mills segment. Metal margin is the difference between the selling price of steel and the cost of scrap and scrap substitutes. The average scrap and scrap substitute cost per gross ton used in the third quarter of 2020 was $277, a 7% decrease compared to $299 in the third quarter of 2019. Despite the decrease in average scrap and scrap substitute cost per gross ton used, metal margin in the steel mills segment decreased due to lower volumes and lower average selling prices.

Scrap prices are driven by the global supply and demand for scrap and other iron-based raw materials used to make steel. As we begin the fourth quarter of 2020, we currently expect a stable outlook for scrap prices.

• Pre-operating and start-up costs of new facilities decreased to approximately $22 million in the third quarter of 2020 from approximately $28 million in the third quarter of 2019. Pre-operating and start-up costs in the third quarter of 2020 primarily related to the bar mill being built in Florida, the plate mill being built in Kentucky, the sheet mill expansion in Kentucky and the merchant bar quality mill expansion at our bar mill in Illinois. In the third quarter of 2019, pre-operating and start-up costs related primarily to the cold mill expansion at our sheet mill in Arkansas, the bar mill in Missouri, the sheet mill expansion in Kentucky, the upgrades at our Louisiana DRI facility and the bar mill being built in Florida. Nucor defines pre-operating and start-up costs, all of which are expensed, as the losses attributable to facilities or major projects that are either under construction or in the early stages of operation. Once these facilities or projects have attained a utilization rate that is consistent with our similar operating facilities, they are no longer considered by Nucor to be in start-up.

• Gross margins in the steel products segment increased in the third quarter of 2020 as compared to the third quarter of 2019. The primary driver was the large increases in margins from our rebar fabrication and joist products businesses as demand in the nonresidential construction market remains resilient. These large increases were partially offset by decreased margins at our building systems business.

• Gross margins in the raw materials segment increased in the third quarter of 2020 as compared to the third quarter of 2019, primarily due to improved performance at our DRI facilities that resulted in lower losses. The improved performance was partially offset by decreased margins at DJJ’s brokerage operations.

Nucor recorded gross margins of $1.51 billion (10%) in the first nine months of 2020, which was a decrease compared with $2.24 billion (13%) in the first nine months of 2019.

• The primary driver for the decrease in gross margins in the first nine months of 2020 as compared to the first nine months of 2019 was decreased metal margin in the steel mills segment. The average scrap and scrap substitute cost per gross ton used in the first nine months of 2020 was $285, a 13% decrease compared to $328 in the first nine months of 2019. Despite the decrease in average scrap and scrap substitute cost per gross ton used, metal margin in the steel mills segment decreased due to lower average selling prices and lower volumes.

• Pre-operating and start-up costs of new facilities increased to approximately $73 million in the first nine months of 2020 from approximately $68 million in the first nine months of 2019.

• Gross margins in the steel products segment increased in the first nine months of 2020 as compared to the first nine months of 2019, primarily due to increased margins across most of our steel product businesses, most notably at our rebar fabrication and tubular products businesses, which were partially offset by decreased margins at our building systems and cold finish businesses.

• Gross margins in the raw materials segment decreased in the first nine months of 2020 as compared to the first nine months of 2019, primarily due to decreased margins at DJJ’s brokerage and scrap processing operations, as well as margin contraction at our DRI facilities.

Marketing, Administrative and Other Expenses

A major component of marketing, administrative and other expenses is profit sharing and other incentive compensation costs. These costs, which are based upon and fluctuate with Nucor’s financial performance, decreased by $9.8 million in the third quarter of 2020 as compared to the third quarter of 2019, and decreased by $121.0 million in the first nine months of 2020 as compared to the first nine months of 2019. These decreases were due to Nucor’s decreased profitability in the third quarter and first nine months of 2020 as compared to the respective prior year periods, which resulted in significantly decreased accruals related to profit sharing.

Included in marketing, administrative and other expenses in the first nine months of 2020 was $18.2 million of restructuring charges related to the realignment of Nucor’s metal buildings business in the steel products segment. Of that amount, $16.4 million was recorded in the third quarter of 2020. Included in marketing, administrative and other expenses in the first nine months of 2019 was a benefit of $33.7 million related to the gain on the sale of an equity method investment in the raw materials segment.

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Equity in Losses (Earnings) of Unconsolidated Affiliates

Equity in losses (earnings) of unconsolidated affiliates was $(0.5) million and $1.6 million in the third quarter of 2020 and 2019, respectively. The increase in equity method investment earnings was primarily due to the improved results of NuMit.

Equity in losses (earnings) of unconsolidated affiliates was $14.4 million and $(2.5) million in the first nine months of 2020 and 2019, respectively. The decrease in equity method investment earnings was primarily due to decreased results of NuMit and Nucor-JFE.

Losses on Assets

Included in the first nine months of 2020 earnings were losses on assets of $299.5 million related to our equity method investment in Duferdofin Nucor. Nucor determined that a triggering event occurred in the first quarter of 2020 due to adverse developments in the joint venture’s commercial outlook, which have been exacerbated by the COVID‐19 pandemic, which have negatively impacted the joint venture’s strategic direction.

As a part of the losses on assets, Nucor recorded a non‐cash impairment charge of $261.6 million on its equity method investment in Duferdofin Nucor that is included in the steel mills segment earnings. Additionally, the Company recorded a $37.9 million charge to fully reserve its outstanding note receivable from Duferdofin Nucor. This impact is recorded in the Corporate/eliminations line.

Interest Expense (Income)

Net interest expense for the third quarter and first nine months of 2020 and 2019 was as follows (in thousands):

	Three Months (13 Weeks) Ended						Nine Months (39 Weeks) Ended
	Oct. 3, 2020			Sept. 28, 2019			Oct. 3, 2020			Sept. 28, 2019
Interest expense	$	42,281		$	40,721		$	128,726		$	119,736
Interest income		(2,142	)		(9,435	)		(11,870	)		(26,977	)
Interest expense, net	$	40,139		$	31,286		$	116,856		$	92,759

Interest expense increased in the third quarter of 2020 compared to the third quarter of 2019 due to increased average debt outstanding. Interest expense increased in the first nine months of 2020 compared to the first nine months of 2019 due to decreased capitalized interest and increased average debt outstanding.

Interest income decreased in the third quarter and first nine months of 2020 as compared to the third quarter and first nine months of 2019 due to a decrease in average interest rates on investments.

Earnings (Loss) Before Income Taxes and Noncontrolling Interests

The following table presents earnings (loss) before income taxes and noncontrolling interests by segment for the third quarter and first nine months of 2020 and 2019 (in thousands). The changes between periods were driven by the quantitative and qualitative factors previously discussed.

	Three Months						Nine Months
	(13 Weeks) Ended						(39 Weeks) Ended
	Oct. 3, 2020			Sept. 28, 2019			Oct. 3, 2020			Sept. 28, 2019
Steel mills	$	205,152		$	309,939		$	512,082		$	1,578,257
Steel products		186,976			170,214			502,409			363,731
Raw materials		6,232			(10,599	)		(3,068	)		64,333
Corporate/eliminations		(107,942	)		(89,215	)		(393,651	)		(401,744	)
	$	290,418		$	380,339		$	617,772		$	1,604,577

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Noncontrolling Interests

Noncontrolling interests represent the income attributable to the noncontrolling partners of Nucor’s joint ventures, primarily Nucor-Yamato Steel Company (Limited Partnership) (“NYS”) of which Nucor owns 51%. The increase in earnings attributable to noncontrolling interests in the third quarter and first nine months of 2020 as compared to the third quarter and first nine months of 2019 was mainly the result of the higher earnings of NYS, which was due to increased sales volume in the first nine months of 2020 as compared to the first nine months of 2019. Under the NYS limited partnership agreement, the minimum amount of cash to be distributed each year to the partners is the amount needed by each partner to pay applicable U.S. federal and state income taxes. In the first nine months of 2020, the amount of cash distributed to noncontrolling interest holders exceeded the earnings attributable to noncontrolling interests based on mutual agreement of the general partners; however, the cumulative amount of cash distributed to partners was less than the cumulative net earnings of the partnership.

Provision for Income Taxes

The effective tax rate for the third quarter of 2020 was 23.3% as compared to 22.8% for the third quarter of 2019. The expected effective tax rate for the full year of 2020 is approximately 31.5% as compared to 23.1% for the full year of 2019. The increase in the expected effective tax rate for the full year of 2020 as compared to the rate for the full year of 2019 is primarily due to the $261.6 million financial statement impairment of our equity method investment in Duferdofin Nucor in the first nine months of 2020. The impairment has no corresponding impact to the provision for income taxes.

We estimate that in the next 12 months our gross unrecognized tax benefits, which totaled $51.1 million at October 3, 2020, exclusive of interest, could decrease by as much as $6.2 million as a result of the expiration of the statute of limitations and closures of examinations, substantially all of which would impact the effective tax rate.

Nucor has concluded U.S. federal income tax matters for years through 2016, except for 2015. The tax years 2015 and 2017 through 2019 remain open to examination by the Internal Revenue Service. The 2015 Canadian income tax returns for Harris Steel Group Inc. and certain related affiliates are currently under examination by the Canada Revenue Agency. The tax years 2013 through 2019 remain open to examination by other major taxing jurisdictions to which Nucor is subject (primarily Canada and other state and local jurisdictions). From time to time in the ordinary course of business, Nucor is involved in tax disputes with federal, state and local taxing jurisdictions, which are, individually and in the aggregate, immaterial to Nucor.

Net Earnings Attributable to Nucor Stockholders and Return on Equity

Nucor reported consolidated net earnings of $193.4 million, or $0.63 per diluted share, in the third quarter of 2020 as compared to consolidated net earnings of $275.0 million, or $0.90 per diluted share, in the third quarter of 2019. Net earnings attributable to Nucor stockholders as a percentage of net sales were 4% and 5% in the third quarter of 2020 and 2019, respectively.   

Nucor reported consolidated net earnings of $322.6 million, or $1.06 per diluted share, in the first nine months of 2020 as compared to consolidated net earnings of $1.16 billion, or $3.78 per diluted share, in the first nine months of 2019. Net earnings attributable to Nucor stockholders as a percentage of net sales were 2% and 7% in the first nine months of 2020 and 2019, respectively. Annualized return on average stockholders’ equity was 4% and 15% in the first nine months of 2020 and 2019, respectively.

Outlook

The ongoing COVID-19 pandemic continues to cause uncertainty, making it difficult to accurately forecast future market conditions and demand trends. While many of the markets Nucor serves have typically experienced a seasonal slowdown in the fourth quarter, the Company expects higher earnings in the fourth quarter of 2020 as compared to the third quarter of 2020 due primarily to improved pricing at our sheet and plate mills. Nucor also expects the raw materials segment's earnings to increase in the fourth quarter of 2020 as compared to the third quarter of 2020 due to the improved margins at the Company's DRI facilities.

Nucor’s largest exposure to market risk is via our steel mills and steel products segments. Our largest single customer in the third quarter of 2020 represented approximately 5% of sales and has consistently paid within terms. In the raw materials segment, we are exposed to price fluctuations related to the purchase of scrap and scrap substitutes, pig iron and iron ore. Our exposure to market risk is mitigated by the fact that our steel mills use a significant portion of the products of the raw materials segment.

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Liquidity and Capital Resources

As a result of the COVID-19 pandemic and the significant uncertainty it will continue to have on Nucor and our stakeholders, we have instituted enterprise-wide efforts to enhance our liquidity and support our teammates, which include, among other things:

• Capital Expenditures – We began the year with a capital expenditures budget of $2.00 billion. We reviewed our capital expenditures budget and decided to delay certain capital projects that had not begun, briefly paused a few of our larger projects and continued with certain projects that were either close to completion or where work had been scheduled. As a result, our 2020 capital expenditures estimate is approximately $1.70 billion.

• Working Capital – Our net working capital position has contracted to provide a source of incremental liquidity as business activity has slowed. In addition, we are maintaining reduced raw material inventory levels in line with our anticipated near-term production requirements, a change we believe is sustainable and we intend to maintain after the pandemic.

• Pay & Benefits – We expect a significant decrease in compensation expense in 2020 as almost all of our remuneration plans are heavily weighted toward incentive compensation which rewards productivity and profitability. We implemented a temporary compensation floor for production and non-production hourly teammates and have committed to offering at least their normal benefits during the crisis. Nucor’s executive compensation program intentionally sets base salaries below the market median for similar size industrial and materials companies. With much lower profitability expected in 2020, we anticipate our executive leadership will incur a significant reduction in earned incentive compensation on an absolute dollar and percentage basis compared to compensation attributable to 2019 performance.

To further enhance our liquidity, Nucor took advantage of attractive market conditions during the second quarter of 2020 to issue low coupon debt in the form of long-term notes. In May, Nucor issued $500.0 million of 2.000% Notes due 2025 and $500.0 million of 2.700% Notes due 2030. Additionally, in July, Nucor became an obligor with respect to $162.6 million in 40-year variable-rate Green Bonds to partially fund the capital costs associated with the construction of our plate mill located in Brandenburg, Kentucky. Our credit ratings of an A- long-term rating from Standard & Poor’s and a Baa1 long-term rating from Moody’s were unchanged by these debt issuances.

Nucor operates a capital-intensive business in highly cyclical markets. We therefore utilize conservative financial practices that maximize our financial strength during economic downturns like the one we are currently experiencing that was caused by the COVID-19 pandemic. Our liquidity position, consisting of cash and cash equivalents, short-term investments and restricted cash and cash equivalents, remained strong at $3.41 billion as of October 3, 2020. Additionally, Nucor has no significant debt maturities until September 2022.

Nucor’s strong liquidity position maximizes our flexibility for prudent deployment of our capital. We have three priorities to allocating our capital. Nucor’s highest capital allocation priority is to reinvest in our business to ensure our continued profitable growth over the long term. We have historically done this by investing to optimize our existing operations, initiate greenfield expansions and make acquisitions. Our second priority is to provide our stockholders with cash dividends that are consistent with our success in delivering long-term earnings growth. Our third priority is to supplement our base dividend with additional returns of capital to our stockholders when both our earnings and financial condition are strong. We still currently intend to return a minimum of 40% of our net earnings to our stockholders while maintaining a debt-to-capital ratio that supports a strong investment grade credit rating. We will use stock repurchases or supplemental dividends to reach this 40% return level when our base dividend is not sufficient to meet this goal. The primary factor we will use to decide between share repurchases and supplemental dividends will be our assessment of the intrinsic value of a Nucor share. In September 2018, Nucor’s Board of Directors approved a new share repurchase program which authorized the Company to repurchase up to $2.00 billion of its common stock. As of October 3, 2020, the Company had approximately $1.16 billion remaining available for share repurchases under the program.

Cash provided by operating activities was $2.21 billion in the first nine months of 2020 as compared to $2.12 billion in the first nine months of 2019. Net earnings declined by $826.5 million over the prior year period, which included a $299.5 million non-cash loss on assets related to our equity method investment in Duferdofin Nucor. The decrease in net earnings in the first nine months of 2020 as compared to the first nine months of 2019 was partially offset by a $528.3 million increase in cash provided by operating assets and operating liabilities in the same period. Changes in operating assets and liabilities (exclusive of acquisitions) provided cash of $693.2 million in the first nine months of 2020 as compared to $165.0 million in the prior year period. The funding of our working capital in the first nine months of 2020 decreased as compared to the first nine months of 2019 mainly due to decreases in inventory and other current assets, specifically the federal income tax receivable, and an increase in other non-current liabilities, but also due to more moderate fluctuations in accounts receivable and accounts payable from year-end 2019 to the end of the third quarter of 2020 as compared to the same prior year period. Inventory reduction, especially scrap, was a particular focus due to uncertainty from the COVID-19 pandemic

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beginning in the second quarter of 2020, and our investment in inventory at the end of the third quarter of 2020 continued to decline from prior quarter-end levels. As a result, inventories decreased by over 1.2 million tons, or 17%, in the third quarter of 2020 from the fourth quarter of 2019. The decrease in federal income tax receivable was mainly a function of the timing of federal tax payments. The increase in other non-current liabilities was mainly driven by an increase in deferred Social Security tax accruals permitted under the CARES Act. Also contributing to the increase in cash provided by operating assets and operating liabilities when comparing the first nine months of 2020 to the same prior year period was the more moderate cash outflow related to salaries, wages, and related accruals. The decrease in cash used to fund salaries, wages and related accruals in the first nine months of 2020 as compared to the first nine months of 2019 was due to the timing of incentive compensation payments and lower current year profit sharing accruals due to the decreased profitability of the Company. Cash provided by accounts receivable was more moderate in the first nine months of 2020 than in the first nine months of 2019. Accounts receivable decreased in the first nine months of 2019 from year-end 2018 due to an 11% decrease in composite sales price per ton, while composite sales price dropped only 2% from year-end 2019 to the end of the third quarter of 2020. Similarly, accounts payable provided cash of $15.4 million in the first nine months of 2020 as opposed to using cash of $180.4 million in the same prior year period. Accounts payable decreased from year-end 2018 to the end of the third quarter of 2019 due to an 18% decline in average scrap and scrap substitutes cost per gross ton in inventory and an 8% decline in total inventory tons on hand, whereas accounts payable was flat from year-end 2019 to the end of the third quarter of 2020.

The current ratio was 3.8 at the end of the third quarter of 2020 and 3.3 at year-end 2019. The current ratio was positively impacted by the 79% increase in cash and cash equivalents and short-term investments and the 15% decrease in salaries, wages and related accruals, partially offset by the 15% decrease in inventory previously discussed. The increase in cash and cash equivalents and short-term investments was a result of the debt issuance and robust cash provided by operations during the first nine months of 2020. The decrease in salaries, wages and related accruals was due to the reasons cited above. In the first nine months of 2020, accounts receivable turned approximately every 5.5 weeks and inventories turned approximately every 10 weeks, compared to approximately every 5.5 weeks and 11 weeks, respectively, in the first nine months of 2019.

Cash used in investing activities during the first nine months of 2020 was $1.33 billion as compared to $1.17 billion in the prior year period. Cash used for capital expenditures in the first nine months of 2020 increased by 20%, or $194.4 million, from the same period in 2019. The higher levels of capital expenditures were primarily related to the new micro mill greenfield expansion in Frostproof, Florida, the flex galvanizing line at Nucor Steel Arkansas, and the sheet mill expansion at Nucor Steel Gallatin. Also impacting cash used in investing activities in the first nine months of 2020 was the purchase of $402.0 million of investments, as opposed to $249.6 million in the prior year period, offset by proceeds from the sale of investments of $301.2 million. Additionally, the first nine months of 2019 benefited from cash provided by the divestiture of an affiliate of $67.6 million related to the sale of an equity method investment.

Cash provided by financing activities during the first nine months of 2020 was $596.6 million as compared to cash used in financing activities of $664.5 million in the prior year period. The majority of this change related to the issuance of $500.0 million of 2.000% Notes due 2025 and $500.0 million of 2.700% Notes due 2030, as well as Nucor becoming an obligor with respect to $162.6 million in 40-year variable-rate Green Bonds as discussed previously. In addition, there were approximately $39.5 million of treasury stock repurchases in the first nine months of 2020 (none in the second or third quarter of 2020) as compared to $197.5 million in the first nine months of 2019. In the first quarter of 2020, one of the remarketing agents for Nucor’s industrial development revenue bonds (“IDRBs”) put a portion of two bonds to us, resulting in repayment of $32.0 million in long-term debt. We subsequently remarketed the bonds and received $32.0 million in proceeds. Nucor’s IDRBs are variable-rate, tax-exempt bonds which have interest rates that reset on a weekly basis through an ongoing remarketing process. We expect our bonds to be successfully placed with investors at the market driven rates in the future. However, there have been times in severe economic downturns, as was the case during the first quarter of 2020 as a result of the economic impacts of COVID-19, that a remarketing agent is unable to remarket Nucor’s bonds successfully and is unwilling to temporarily hold the bonds. In that situation, which has been rare in our experience, it is possible that the bonds could be put back to us in the future. In this instance during the first quarter of 2020, the IDRBs were remarketed successfully in a short period of time. However, in the event of a prolonged failed remarketing, we have, among other options, availability under our $1.50 billion revolver credit facility to repurchase the IDRBs until they are remarketed successfully. In general, Nucor has the ability and intent to refinance the IDRB debt on a long-term basis, therefore we classify the IDRBs as a long-term liability. The remaining $65.2 million of debt that was repaid during the first nine months of 2020 was related to a different tranche of Nucor’s IDRBs that was repurchased as part of our investment strategy and the payoff of a series of IDRBs that matured during the third quarter.

Nucor’s $1.50 billion revolving credit facility is undrawn and was amended and restated in April 2018 to extend the maturity date to April 2023. We believe our financial strength is a key strategic advantage among domestic steel producers, particularly during recessionary business cycles. We believe this was demonstrated with the second quarter of 2020 issuance of $500.0 million of 2.000% Notes due 2025 and $500.0 million of 2.700% Notes due 2030, the coupon rates of which were the lowest in Nucor’s history for fixed-rate debt of those durations. We currently carry the highest credit ratings of

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any steel producer headquartered in North America, with an A- long-term rating from Standard & Poor’s and a Baa1 long-term rating from Moody’s. Our credit ratings are dependent, however, upon a number of factors, both qualitative and quantitative, and are subject to change at any time. The disclosure of our credit ratings is made in order to enhance investors’ understanding of our sources of liquidity and the impact of our credit ratings on our cost of funds.

Our credit facility includes only one financial covenant, which is a limit of 60% on the ratio of funded debt to total capitalization. In addition, the credit facility contains customary non-financial covenants, including a limit on Nucor’s ability to pledge the Company’s assets and a limit on consolidations, mergers and sales of assets. As of October 3, 2020, our funded debt to total capital ratio was 34% and we were in compliance with all non-financial covenants under our credit facility. No borrowings were outstanding under the credit facility as of October 3, 2020.

Although our business is capital intensive, we maintain a number of capital preservation options. Nucor’s robust capital investment and maintenance practices give us the flexibility to reduce spending by prioritizing our capital projects, potentially rescheduling certain projects and selectively allocating capital to investments with the greatest impact on our long-term earnings power. We have taken advantage of this flexibility in the current environment. Nucor originally estimated its 2020 capital expenditures to be $2.00 billion, adjusted it to less than $1.50 billion at the end of the first quarter, and now estimates 2020 capital expenditures to be $1.70 billion. As previously mentioned, Nucor reviewed its capital spending budget and decided delay capital projects that had not begun, briefly pause a few of our larger projects and continue with certain projects that are either close to completion or where work had been scheduled. We have made the decision to reaccelerate our investment in the Brandenburg, Kentucky plate mill and the expansion and modernization of our Gallatin, Kentucky sheet mill. We are taking this step after a thorough review of these projects and their compelling projected economic returns as well as our strong cash flow performance in the first nine months of 2020. We expect these projects, as well as the flex galvanizing line at Nucor Steel Arkansas and the micro mill greenfield expansion in Frostproof, Florida, will have the largest capital expenditures in 2020.

In September 2020, Nucor’s Board of Directors declared a quarterly cash dividend on Nucor’s common stock of $0.4025 per share payable on November 10, 2020 to stockholders of record on September 30, 2020. This dividend is Nucor’s 190^th consecutive quarterly cash dividend.

Funds provided from operations, cash and cash equivalents, short-term investments, restricted cash and cash equivalents and new borrowings under our existing credit facilities are expected to be adequate to meet future capital expenditure and working capital requirements for existing operations for at least the next 24 months.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

In the ordinary course of business, Nucor is exposed to a variety of market risks. We continually monitor these risks and develop strategies to manage them.

Interest Rate Risk

Nucor manages interest rate risk by using a combination of variable-rate and fixed-rate debt. Nucor also occasionally makes use of interest rate swaps to manage net exposure to interest rate changes. Management does not believe that Nucor’s exposure to interest rate risk has significantly changed since December 31, 2019. There were no interest rate swaps outstanding at October 3, 2020.

Commodity Price Risk

In the ordinary course of business, Nucor is exposed to market risk for price fluctuations of raw materials and energy, principally scrap steel, other ferrous and nonferrous metals, alloys and natural gas. We attempt to negotiate the best prices for our raw material and energy requirements and to obtain prices for our steel products that match market price movements in response to supply and demand. In periods of strong or stable demand for our products, we are more likely to be able to effectively reduce the normal time lag in passing through higher raw material costs so that we can maintain our gross margins. When demand for our products is weaker, this becomes more challenging. Our DRI facilities in Trinidad and Louisiana provide us with flexibility in managing our input costs. DRI is particularly important for operational flexibility when demand for prime scrap increases due to increased domestic steel production.

Natural gas produced by Nucor’s drilling operations is being sold to third parties to offset our exposure to changes in the price of natural gas consumed by our Louisiana DRI facility and our steel mills in the United States.

Nucor also periodically uses derivative financial instruments to hedge a portion of our exposure to price risk related to natural gas purchases used in the production process and to hedge a portion of our scrap, aluminum and copper purchases and sales. Gains and losses from derivatives designated as hedges are deferred in accumulated other comprehensive loss,

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net of income taxes in the condensed consolidated balance sheets and recognized in earnings in the same period as the underlying physical transaction. At October 3, 2020, accumulated other comprehensive loss, net of income taxes included $2.4 million in unrealized net-of-tax losses for the fair value of these derivative instruments. Changes in the fair value of derivatives not designated as hedges are recognized in net earnings each period. The following table presents the negative effect on pre-tax earnings of a hypothetical change in the fair value of derivative instruments outstanding at October 3, 2020, due to an assumed 10% and 25% change in the market price of each of the indicated commodities (in thousands):

Commodity Derivative	10% Change		25% Change
Natural gas	$	7,010	$	17,525
Aluminum	$	5,803	$	14,507
Copper	$	2,016	$	4,969

Any resulting changes in fair value would be recorded as adjustments to accumulated other comprehensive loss, net of income taxes or recognized in net earnings, as appropriate. These hypothetical losses would be partially offset by the benefit of lower prices paid or higher prices received for the physical commodities.

Foreign Currency Risk

Nucor is exposed to foreign currency risk primarily through its operations in Canada, Europe and Mexico. We periodically use derivative contracts to mitigate the risk of currency fluctuations. Open foreign currency derivative contracts at October 3, 2020 were insignificant.

Item 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

As of the end of the period covered by this report, the Company carried out an evaluation, under the supervision and with the participation of the Company’s management, including the Company’s Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of the Company’s disclosure controls and procedures. Based upon that evaluation, the Chief Executive Officer and the Chief Financial Officer concluded that the Company’s disclosure controls and procedures were effective as of the evaluation date.

Changes in Internal Control Over Financial Reporting

There were no changes in our internal control over financial reporting during the quarter ended October 3, 2020 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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PART II. OTHER INFORMATION

Item 1. Legal Proceedings

Nucor is 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.

Nucor Steel Louisiana LLC, our DRI facility located in St. James Parish, Louisiana, has received a Consolidated Compliance Order and Notice of Potential Penalty from the Office of Environmental Enforcement of the Louisiana Department of Environmental Quality (“LDEQ”) related to emissions issues that the facility voluntarily reported to LDEQ. Nucor Steel Louisiana LLC and LDEQ are in discussions regarding a Consolidated Settlement Agreement with LDEQ, but no penalty has been finalized. We believe the aggregate civil penalty for these compliance issues will not be material to Nucor but will likely exceed $100,000.

Item 1A. Risk Factors

There have been no material changes in Nucor’s risk factors from those included in “Item 1A. Risk Factors” in Nucor’s Annual Report on Form 10-K for the year ended December 31, 2019, except as follows:

The COVID-19 pandemic, as well as similar epidemics and public health emergencies in the future, could have a material adverse effect on our business, results of operations, financial condition and cash flows.

Our operations expose us to risks associated with pandemics, epidemics and other public health emergencies, such as the recent COVID-19 pandemic which has spread from China to the rest of the world. In March 2020, the World Health Organization characterized the outbreak of COVID-19 as a pandemic, and the President of the United States declared the COVID-19 pandemic a national emergency.

We are a company operating in a critical infrastructure industry, as defined by the U.S. Department of Homeland Security. Shelter‐in‐place or stay‐at‐home orders have been implemented in the jurisdictions in the United States where we operate production facilities. In all of these jurisdictions, Nucor has been deemed an essential or life‐sustaining operation and, accordingly, we are maintaining operations sufficient to meet our customers’ ongoing needs. In spite of our continued operations, the COVID-19 pandemic has had, and we expect will continue to have, further negative impacts on our operations, supply chain, transportation networks and customers, which may compress our margins, including as a result of preventative and precautionary measures that we, other businesses and governments are taking. The COVID-19 pandemic is a widespread public health crisis that is adversely affecting financial markets and the economies of many countries, including that of the United States. The resulting economic downturn could adversely affect demand for our products and contribute to volatile supply and demand conditions affecting prices and volumes in the markets for our products and raw materials. The progression of the COVID-19 pandemic could also negatively impact our business or results of operations through the temporary closure of our operating facilities or those of our customers or suppliers.

In addition, the ability of our teammates and our suppliers’ and customers’ teammates to work may be significantly impacted by individuals contracting or being exposed to COVID-19 or, as a result of governmental control measures, which may significantly impact our production throughout the supply chain and constrict sales channels. Our customers may be directly impacted by business interruptions or weak market conditions and may not be willing or able to fulfill their contractual obligations. Furthermore, the progression of and global response to the COVID-19 pandemic has begun to cause, and increases the risk of, further delays in construction activities and equipment deliveries related to our capital projects, including potential delays in obtaining permits from government agencies. The extent of such delays and other effects of COVID-19 on our capital projects, certain of which are outside of our control, is unknown, but they could impact or delay the timing of anticipated benefits on capital projects.

The extent to which COVID-19 may adversely impact our business depends on future developments, which are highly uncertain and unpredictable, including new information concerning the severity of the pandemic and the effectiveness of actions globally to contain or mitigate its effects. While we expect the COVID-19 pandemic to negatively impact our results of operations, cash flows and financial position, the current level of uncertainty over the economic and operational impacts of COVID-19 means the related financial impact cannot be reasonably estimated at this time.

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Item 6. Exhibits

Exhibit No.	Description of Exhibit
3	Restated Certificate of Incorporation of Nucor Corporation (incorporated by reference to Exhibit 3.3 to the Current Report on Form 8-K filed September 14, 2010 (File No. 001-04119))
3.1	Bylaws of Nucor Corporation, as amended and restated September 15, 2016 (incorporated by reference to Exhibit 3.1 to the Current Report on Form 8-K filed September 20, 2016 (File No. 001-04119))
31*	Certification of Principal Executive Officer Pursuant to Rule 13a-14(a)/15d-14(a), as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.1*	Certification of Principal Financial Officer Pursuant to Rule 13a-14(a)/15d-14(a), as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32**	Certification of Principal Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.1**	Certification of Principal Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101*	Financial Statements (Unaudited) from the Quarterly Report on Form 10-Q of Nucor Corporation for the quarter ended October 3, 2020, filed November 12, 2020, formatted in Inline XBRL: (i) the Condensed Consolidated Statements of Earnings, (ii) the Condensed Consolidated Statements of Comprehensive Income, (iii) the Condensed Consolidated Balance Sheets, (iv) the Condensed Consolidated Statements of Cash Flows and (v) the Notes to Condensed Consolidated Financial Statements.
104*	Cover Page from the Quarterly Report on Form 10-Q of Nucor Corporation for the quarter ended October 3, 2020, filed November 12, 2020, formatted in Inline XBRL (included in Exhibit 101).

* Filed herewith.

** Furnished (and not filed) herewith pursuant to Item 601(b)(32)(ii) of Regulation S-K.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

NUCOR CORPORATION
By:	/s/ James D. Frias
	James D. Frias
	Chief Financial Officer, Treasurer and Executive
	Vice President

Dated: November 12, 2020

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EX-31

Exhibit 31

CERTIFICATION

I, Leon J. Topalian, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Nucor Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 12, 2020	/s/ Leon J. Topalian
	Leon J. Topalian
	President and Chief Executive Officer

EX-31.(I)

Exhibit 31.1

CERTIFICATION

I, James D. Frias, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Nucor Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 12, 2020	/s/ James D. Frias
	James D. Frias
	Chief Financial Officer, Treasurer and Executive Vice President

EX-32

Exhibit 32

Certification Pursuant to

18 U.S.C. Section 1350,

As Adopted Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report on Form 10-Q of Nucor Corporation (the “Registrant”) for the period ended October 3, 2020, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Leon J. Topalian, President and Chief Executive Officer (principal executive officer) of the Registrant, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant.

/s/ Leon J. Topalian
Name:	Leon J. Topalian
Date:	November 12, 2020

EX-32.(I)

Exhibit 32.1

Certification Pursuant to

18 U.S.C. Section 1350,

As Adopted Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report on Form 10-Q of Nucor Corporation (the “Registrant”) for the period ended October 3, 2020, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, James D. Frias, Chief Financial Officer, Treasurer and Executive Vice President (principal financial officer) of the Registrant, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant.

/s/ James D. Frias
Name:	James D. Frias
Date:	November 12, 2020

XML

Document and Entity Information	9 Months Ended
	Oct. 03, 2020 shares
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Oct. 03, 2020
Document Fiscal Year Focus	2020
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	301,928,935

XML

Condensed Consolidated Statements of Earnings - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Income Statement [Abstract]
Net sales	$ 4,927,960	$ 5,464,502	$ 14,879,603	$ 17,457,112
Costs, expenses and other:
Cost of products sold	4,425,765	4,891,991	13,370,181	15,213,215
Marketing, administrative and other expenses	165,513	159,301	460,922	549,020
Equity in losses (earnings) of unconsolidated affiliates	(479)	1,585	14,422	(2,459)
Losses on assets	6,604		299,450
Interest expense, net	40,139	31,286	116,856	92,759
Costs, expenses and other, total	4,637,542	5,084,163	14,261,831	15,852,535
Earnings before income taxes and noncontrolling interests	290,418	380,339	617,772	1,604,577
Provision for income taxes	67,788	86,752	207,610	367,920
Net earnings	222,630	293,587	410,162	1,236,657
Earnings attributable to noncontrolling interests	29,215	18,556	87,535	73,337
Net earnings attributable to Nucor stockholders	$ 193,415	$ 275,031	$ 322,627	$ 1,163,320
Net earnings per share:
Basic	$ 0.63	$ 0.90	$ 1.06	$ 3.79
Diluted	$ 0.63	$ 0.90	$ 1.06	$ 3.78
Average shares outstanding:
Basic	303,394	304,637	303,072	305,553
Diluted	303,441	304,980	303,099	306,029

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Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Oct. 03, 2020		Sep. 28, 2019		Oct. 03, 2020		Sep. 28, 2019
Statement Of Comprehensive Income [Abstract]
Net earnings	$ 222,630		$ 293,587		$ 410,162		$ 1,236,657
Other comprehensive income:
Net unrealized income (loss) on hedging derivatives, net of income taxes of $2,000 and $(1,000) for the third quarter of 2020 and 2019, respectively, and $1,400 and $(2,500) for the first nine months of 2020 and 2019, respectively	6,387		(3,315)		4,888		(7,801)
Reclassification adjustment for settlement of hedging derivatives included in net income, net of income taxes of $700 and $500 for the third quarter of 2020 and 2019, respectively, and $2,300 and $500 for the first nine months of 2020 and 2019, respectively	2,113	[1]	1,615	[2]	6,712	[1]	1,501	[2]
Foreign currency translation gain (loss), net of income taxes of $0 for the third quarter and first nine months of 2020 and 2019	16,867		(14,306)		(24,103)		(5,219)
Net current-period other comprehensive income (loss)	25,367		(16,006)		(12,503)		(11,519)
Comprehensive income	247,997		277,581		397,659		1,225,138
Comprehensive income attributable to noncontrolling interests	(29,215)		(18,556)		(87,535)		(73,337)
Comprehensive income attributable to Nucor stockholders	$ 218,782		$ 259,025		$ 310,124		$ 1,151,801

[1] Includes $2,113 and $6,712 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 2020, respectively. The tax impacts of those reclassifications were $700 and $2,300 in the third quarter and first nine months of 2020, respectively.

[2] Includes $1,615 and $1,501 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 2019, respectively. The tax impacts of those reclassifications were $500 in both the third quarter and first nine months of 2019.

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Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Statement Of Comprehensive Income [Abstract]
Net unrealized income (loss) on hedging derivatives, tax	$ 2,000	$ (1,000)	$ 1,400	$ (2,500)
Reclassification adjustment for settlement of hedging derivatives included in net income, tax effect	700	500	2,300	500
Foreign currency translation gain (loss), tax	$ 0	$ 0	$ 0	$ 0

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Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Oct. 03, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 2,866,578	$ 1,534,605
Short-term investments	412,401	300,040
Accounts receivable, net	2,119,421	2,160,102
Inventories, net	3,260,685	3,842,095
Other current assets	306,762	389,528
Total current assets	8,965,847	8,226,370
Property, plant and equipment, net	6,829,733	6,178,555
Restricted cash and cash equivalents	131,623
Goodwill	2,195,788	2,201,063
Other intangible assets, net	678,558	742,186
Other assets	717,728	996,492
Total assets	19,519,277	18,344,666
Current liabilities:
Short-term debt	63,778	62,444
Current portion of long-term debt and finance lease obligations	10,475	29,264
Accounts payable	1,210,987	1,201,698
Salaries, wages and related accruals	432,767	510,844
Accrued expenses and other current liabilities	655,288	659,524
Total current liabilities	2,373,295	2,463,774
Long-term debt and finance lease obligations due after one year	5,452,193	4,291,301
Deferred credits and other liabilities	976,722	798,415
Total liabilities	8,802,210	7,553,490
Nucor stockholders' equity:
Common stock	152,061	152,061
Additional paid-in capital	2,117,582	2,107,646
Retained earnings	11,068,908	11,115,056
Accumulated other comprehensive loss, net of income taxes	(315,469)	(302,966)
Treasury stock	(2,720,668)	(2,713,931)
Total Nucor stockholders' equity	10,302,414	10,357,866
Noncontrolling interests	414,653	433,310
Total equity	10,717,067	10,791,176
Total liabilities and equity	$ 19,519,277	$ 18,344,666

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Condensed Consolidated Statements of Cash Flows $ in Thousands	9 Months Ended
	Oct. 03, 2020 USD ($)	Sep. 28, 2019 USD ($)
Operating activities:
Net earnings	$ 410,162	$ 1,236,657
Adjustments:
Depreciation	525,688	477,957
Amortization	62,877	64,655
Stock-based compensation	56,122	74,311
Deferred income taxes	140,606	76,737
Distributions from affiliates	3,021	27,405
Equity in losses (earnings) of unconsolidated affiliates	14,422	(2,459)
Losses on assets	299,450
Changes in assets and liabilities (exclusive of acquisitions and dispositions):
Accounts receivable	37,547	197,783
Inventories	590,434	476,761
Accounts payable	15,366	(180,397)
Federal income taxes	18,848	(177,405)
Salaries, wages and related accruals	(69,235)	(157,317)
Other operating activities	100,283	5,526
Cash provided by operating activities	2,205,591	2,120,214
Investing activities:
Capital expenditures	(1,179,081)	(984,646)
Investment in and advances to affiliates	(16,542)	(27,613)
Divestiture of affiliates		67,591
Disposition of plant and equipment	19,492	32,922
Acquisitions (net of cash acquired)	(20,368)	(9,495)
Purchase of investments	(401,986)	(249,616)
Proceeds from the sale of investments	301,249
Other investing activities	(33,536)	2,176
Cash used in investing activities	(1,330,772)	(1,168,681)
Financing activities:
Net change in short-term debt	1,334	(10,145)
Proceeds from long-term debt, net of discount	1,237,635
Repayment of long-term debt	(97,150)
Bond issuance related costs	(6,250)
Issuance of common stock		5,892
Payment of tax withholdings on certain stock-based compensation	(17,691)	(15,723)
Distributions to noncontrolling interests	(106,193)	(71,241)
Cash dividends	(368,636)	(369,270)
Acquisition of treasury stock	(39,499)	(197,511)
Other financing activities	(6,983)	(6,538)
Cash provided by (used in) financing activities	596,567	(664,536)
Effect of exchange rate changes on cash	(7,790)	482
Increase in cash and cash equivalents	1,463,596	287,479
Cash and cash equivalents - beginning of year	1,534,605	1,398,886
Cash and cash equivalents and restricted cash and cash equivalents - end of nine months	$ 2,998,201	1,686,365
Non-cash investing activity:
Change in accrued plant and equipment purchases		$ 62,700

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Basis of Interim Presentation

9 Months Ended

Oct. 03, 2020

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 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, 2019 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, 2019.

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Inventories

9 Months Ended

Oct. 03, 2020

Inventory Disclosure [Abstract]

Inventories

2. Inventories

Inventories consisted of approximately 40% raw materials and supplies and 60% finished and semi-finished products at October 3, 2020 (42% and 58%, respectively, at December 31, 2019). 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.

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Property, Plant and Equipment

9 Months Ended

Oct. 03, 2020

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 $9.87 billion at October 3, 2020 ($9.42 billion at December 31, 2019).

Nucor performed an impairment assessment of its proved producing natural gas well assets in the fourth quarter of 2019. One of the main assumptions that most significantly affects the undiscounted cash flows determination used in the impairment assessment is management’s estimate of future pricing of natural gas and natural gas liquids. The pricing used in the impairment assessment was developed by management based on projected natural gas market supply and demand dynamics, in conjunction with a review of projections by market analysts. Management also makes key estimates on the expected reserve levels and on the expected lease operating costs. The impairment assessment was performed on each of Nucor’s three groups (“fields”) of wells, with each field defined by common geographic location.

As a result of the impairment assessment, Nucor recorded a non-cash impairment charge of $35.0 million relating to one field of wells in the fourth quarter of 2019. The post-impairment carrying value of this field was $11.2 million at October 3, 2020 ($12.3 million at December 31, 2019). The remaining two fields were not impaired as a result of the assessment and had a combined carrying value of $62.4 million at October 3, 2020 ($66.6 million at December 31, 2019). Changes in the natural gas industry or a prolonged low-price environment beyond what had already been assumed in the assessments could cause management to revise the natural gas and natural gas liquids price assumptions, the estimated reserves or the estimated lease operating costs. Unfavorable revisions to these assumptions or estimates could possibly result in further impairment of some or all of the fields of proved well assets.

Nucor owns a 49% leasehold interest in unproved oil and natural gas properties covering approximately 54,000 acres in the South Piceance Basin located in Colorado. Nucor is subject to forfeiture of a portion of its leasehold interest in these properties if we do not drill new wells within various contractually specified time periods. A decision to not develop a portion of these properties within the specified time periods would likely result in a partial asset impairment in the future. The carrying value of the entire leasehold interest at October 3, 2020 was $165.0 million. Nucor has full discretion on its participation in all future drilling capital investments related to the leasehold interest.

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Goodwill and Other Intangible Assets

9 Months Ended

Oct. 03, 2020

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 October 3, 2020 by segment was as follows (in thousands):

	Steel Mills		Steel Products			Raw Materials		Total
Balance at December 31, 2019	$	591,986	$	879,500		$	729,577	$	2,201,063
Other		-		(821	)		-		(821	)
Translation		-		(4,454	)		-		(4,454	)
Balance at October 3, 2020	$	591,986	$	874,225		$	729,577	$	2,195,788

Nucor completed its most recent annual goodwill impairment testing during the fourth quarter of 2019 and concluded that as of such time there was no impairment of goodwill for any of its reporting units.

The assessment performed in 2019 used forward-looking projections and included expected improvements in the future cash flows of one of the Company’s reporting units, Rebar Fabrication. The fair value of this reporting unit exceeded its carrying value by approximately 56% in the most recent assessment. The reporting unit’s profitability in the first nine months of 2020 significantly increased from the first nine months of 2019. We expect the 2020 operating results of the Rebar Fabrication reporting unit will continue to improve compared to 2019. If our assessment of the relevant facts and circumstances changes, or the actual performance of this reporting unit falls short of expected results, non-cash impairment charges may be required. Total goodwill associated with the Rebar Fabrication reporting unit was $352.7 million as of October 3, 2020 ($356.6 million as of December 31, 2019). An impairment of goodwill may also lead us to record an impairment of other intangible assets. Total finite-lived intangible assets associated with the Rebar Fabrication reporting unit were $59.6 million as of October 3, 2020 ($67.2 million as of December 31, 2019). There have been no triggering events requiring an interim assessment for impairment of the Rebar Fabrication reporting unit since the most recent annual goodwill impairment testing date.

Due to lower than expected operating results and anticipated changes to the Grating reporting unit’s business strategy and structure, the Company determined a triggering event occurred in the third quarter of 2019 and performed an impairment assessment. The fair value of the Grating reporting unit exceeded its carrying value by approximately 17% in that assessment. If our assessment of the relevant facts and circumstances changes, or the actual performance of this reporting unit falls short of expected results, non-cash impairment charges may be required. Total goodwill associated with the Grating reporting unit was $36.6 million as of October 3, 2020 ($36.8 million as of December 31, 2019).

Intangible assets with estimated useful lives of five to 22 years are amortized on a straight-line or accelerated basis and were comprised of the following as of October 3, 2020 and December 31, 2019 (in thousands):

	October 3, 2020				December 31, 2019
	Gross Amount		Accumulated Amortization		Gross Amount		Accumulated Amortization
Customer relationships	$	1,412,323	$	821,029	$	1,412,954	$	767,532
Trademarks and trade names		162,062		98,110		162,183		92,258
Other		63,822		40,510		63,807		36,968
	$	1,638,207	$	959,649	$	1,638,944	$	896,758

Intangible asset amortization expense in the third quarter of 2020 and 2019 was $20.7 million and $22.0 million, respectively, and was $62.9 million and $64.7 million in the first nine months of 2020 and 2019, respectively. Annual amortization expense is estimated to be $83.5 million in 2020; $82.3 million in 2021; $80.7 million in 2022; $80.0 million in 2023; and $79.2 million in 2024.

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Equity Investments

9 Months Ended

Oct. 03, 2020

Equity Method Investments And Joint Ventures [Abstract]

Equity Investments

5. Equity Investments

The carrying value of our equity investments in domestic and foreign companies was $521.2 million at October 3, 2020 ($793.2 million at December 31, 2019) and is recorded in other assets in the condensed consolidated balance sheets.

NuMit

Nucor owns a 50% economic and voting interest in NuMit LLC (“NuMit”). NuMit owns 100% of the equity interest in Steel Technologies LLC, an operator of 26 sheet processing facilities located throughout the United States, Canada and

Mexico. Nucor accounts for its investment in NuMit (on a one-month lag basis) under the equity method, as control and risk of loss are shared equally between the members of NuMit. Nucor’s investment in NuMit was $322.5 million at October 3, 2020 ($319.8 million at December 31, 2019). Nucor received distributions of $2.0 million and $27.4 million from NuMit during the first nine months of 2020 and 2019, respectively.

Duferdofin Nucor

Nucor owns a 50% economic and voting interest in Duferdofin Nucor S.r.l. (“Duferdofin Nucor”), an Italian steel manufacturer, and accounts for its investment (on a one-month lag basis) under the equity method, as control and risk of loss are shared equally between the members of Duferdofin Nucor.

Nucor’s investment in Duferdofin Nucor was $0.1 million at October 3, 2020 ($263.0 million at December 31, 2019). Nucor’s 50% share of the total net assets of Duferdofin Nucor was $128.6 million at October 3, 2020, resulting in a negative basis difference of $128.5 million. This was due to the $261.6 million impairment charge taken against the Company’s investment in Duferdofin Nucor in the first nine months of 2020 as discussed below, offset by the step-up to fair value of certain assets and liabilities attributable to Duferdofin Nucor, as well as the identification of goodwill ($86.5 million at December 31, 2019) and finite-lived intangible assets. This basis difference prior to the impairment charge, excluding the portion attributable to goodwill, was being amortized based on the remaining estimated useful lives of the various underlying net assets, as appropriate, through the first quarter of 2020. Beginning with the second quarter of 2020, the negative basis difference began amortizing based on the remaining estimated useful lives of the various underlying net assets, as appropriate. Amortization associated with the negative basis in the third quarter of 2020 was income of $1.9 million, compared to an expense of $2.2 million in the third quarter of 2019, associated with the fair value step-up. Net amortization was $1.6 million of income in the first nine months of 2020, and $6.7 million of expense in the first nine months 2019.     

As of October 3, 2020, Nucor had outstanding notes receivable of €35.0 million ($41.0 million) from Duferdofin Nucor (€35.0 million, or $39.3 million, as of December 31, 2019). The notes receivable bear interest at a rate that resets annually on September 30 to the 12-month Euro Interbank Offered Rate plus 0.75% per year. The maturity date of the principal amounts is January 31, 2022. As of October 3, 2020 and December 31, 2019, the notes receivable were classified in other assets in the condensed consolidated balance sheets. These notes were fully reserved in connection with the $261.6 million impairment charge taken against the Company’s investment in Duferdofin Nucor in the first nine months of 2020.

Nucor has issued a guarantee for its ownership percentage (50%) of Duferdofin Nucor’s borrowings under Facility A of a Structured Trade Finance Facilities Agreement (“Facility A”). The fair value of the guarantee is immaterial. In April 2018, Duferdofin Nucor amended and extended Facility A to mature on April 16, 2021. The maximum amount Duferdofin Nucor could borrow under Facility A was €160.0 million ($187.5 million) at October 3, 2020. As of October 3, 2020, there was €132.0 million ($154.7 million) outstanding under that facility (€147.0 million, or $164.9 million, as of December 31, 2019). If Duferdofin Nucor fails to pay when due any amounts for which it is obligated under Facility A, Nucor could be required to pay 50% of such amounts pursuant to and in accordance with the terms of its guarantee. Any indebtedness of Duferdofin Nucor to Nucor is effectively subordinated to the indebtedness of Duferdofin Nucor under Facility A. Nucor has not recorded any liability associated with this guarantee.

On October 2, 2020, Nucor entered into an agreement (the “Duferdofin Agreement”) to transfer its 50% economic and voting interest in Duferdofin Nucor to the owner of the remaining 50% interest. The closing of the transaction is subject to Duferdofin Nucor renegotiating the borrowings currently under Facility A, Nucor’s relief under the guarantee and other customary closing conditions, including regulatory consents. The closing of the transaction is expected to occur during the fourth quarter of 2020.  Nucor is continuing to evaluate the impact of the transaction contemplated by the Duferdofin Agreement on the financial statements, which will include foreign currency losses currently included in accumulated other comprehensive loss as outlined in Footnote 14 and other impacts.

Nucor-JFE

Nucor owns a 50% economic and voting interest in Nucor-JFE Steel Mexico, S. de R.L. de C.V. (“Nucor-JFE”), a 50-50 joint venture with JFE Steel Corporation of Japan, to build and operate a galvanized sheet steel plant in central Mexico. After delays caused by the COVID-19 pandemic, Nucor JFE is expected to begin commissioning in November of this year. Nucor accounts for its investment in Nucor-JFE (on a one-month lag basis) under the equity method, as control and risk of loss are shared equally between the members of Nucor-JFE. Nucor’s investment in Nucor-JFE was $150.3 million at October 3, 2020 ($163.2 million at December 31, 2019).

On January 16, 2019, Nucor entered into an agreement to guarantee a percentage, equal to its ownership percentage (50%), of Nucor-JFE’s borrowings under the General Financing Agreement and Promissory Note (the “JFE Facility”). The fair value of the guarantee is immaterial. Nucor’s guarantee expires on April 30, 2021. The maximum amount Nucor-JFE could borrow under the JFE Facility was $65.0 million as of October 3, 2020. The JFE Facility is uncommitted. As of October 3, 2020, there was $45.0 million outstanding under the JFE Facility (none as of December 31, 2019). If Nucor-JFE fails to pay when due any amounts for which it is obligated under the JFE Facility, Nucor could be required to pay 50% of such

amounts pursuant to and in accordance with the terms of its guarantee. Nucor has not recorded any liability associated with this guarantee.

Nucor-JFE has other credit facilities that Nucor has agreed to guarantee. The principal amount subject to guarantee by Nucor for these other credit facilities was $25.0 million as of October 3, 2020 ($25.0 million as of December 31, 2019). The fair value of the guarantees is immaterial. If Nucor-JFE fails to pay when due any amounts for which it is obligated under the other credit facilities, Nucor could be required to pay such amounts pursuant to and in accordance with the terms of its guarantees. Nucor has not recorded any liability associated with these guarantees.

All Equity Investments

Nucor reviews its equity investments for impairment if and when circumstances indicate that a decline in fair value below their carrying amounts may have occurred. Nucor determined that a triggering event occurred in the first quarter of 2020 with respect to its equity method investment in Duferdofin Nucor due to adverse developments in the joint venture’s commercial outlook, which were and continue to be exacerbated by the COVID-19 pandemic, all of which have negatively impacted the joint venture’s strategic direction. After completing its impairment assessment, Nucor determined that the carrying amount exceeded its estimated fair value and the impairment condition was considered to be other than temporary. Therefore, Nucor recorded a $250.0 million impairment charge in the first quarter of 2020, a $5.0 million impairment charge in the second quarter of 2020, and a $6.6 million impairment charge in the third quarter of 2020 against its investment in Duferdofin Nucor. Any additional capital contributions, if necessary, that Nucor makes to Duferdofin Nucor will likely be subject to impairment. Additionally, in the first quarter of 2020 the Company fully reserved its €35.0 million ($41.0 million) outstanding note receivable from Duferdofin Nucor due to an assessment of the likelihood of collection in light of these adverse developments and its effective subordination to Facility A. These charges are included in losses on assets in the condensed consolidated statements of earnings. The assumptions that most significantly affect the fair value determination include projected cash flows and the discount rate. The Company-specific inputs for measuring fair value are considered “Level 3” or unobservable inputs that are not corroborated by market data under applicable fair value authoritative guidance, as quoted market prices are not available.

It is reasonably possible that material deviation of future performance from the estimates used in our most recent valuation could result in further impairment of our investment in Duferdofin Nucor and affect any potential liability associated with the Company’s guarantee of the indebtedness of Duferdofin Nucor as discussed above.

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Current Liabilities

9 Months Ended

Oct. 03, 2020

Payables And Accruals [Abstract]

Current Liabilities

6. Current Liabilities

Book overdrafts, included in accounts payable in the condensed consolidated balance sheets, were $115.2 million at October 3, 2020 ($116.4 million at December 31, 2019). Dividends payable, included in accrued expenses and other current liabilities in the condensed consolidated balance sheets, were $123.0 million at October 3, 2020 ($122.9 million at December 31, 2019). Accrued vacation and holiday pay, included in salaries, wages and related accruals in the condensed consolidated balance sheets, were $121.8 million at October 3, 2020 ($106.2 million at December 31, 2019).

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Fair Value Measurements

9 Months Ended

Oct. 03, 2020

Fair Value Disclosures [Abstract]

Fair Value Measurements

7. Fair Value Measurements

The following table summarizes information regarding Nucor’s financial assets and financial liabilities that were measured at fair value as of October 3, 2020 and December 31, 2019 (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 Amount in Condensed Consolidated Balance Sheets			Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
As of October 3, 2020
Assets:
Cash equivalents	$	2,539,777		$	2,539,777	$	-		$	-
Short-term investments		412,401			412,401		-			-
Restricted cash and cash equivalents		131,623			131,623
Total assets	$	3,083,801		$	3,083,801	$	-		$	-
Liabilities:
Derivative contracts	$	(6,577	)	$	-	$	(6,577	)	$	-
As of December 31, 2019
Assets:
Cash equivalents	$	1,229,000		$	1,229,000	$	-		$	-
Short-term investments		300,040			300,040		-			-
Total assets	$	1,529,040		$	1,529,040	$	-		$	-
Liabilities:
Derivative contracts	$	(19,599	)	$	-	$	(19,599	)	$	-

Fair value measurements for Nucor’s cash equivalents, short-term investments and restricted cash and cash equivalents are classified under Level 1 because such measurements are based on quoted market prices in active markets for identical assets. Our short-term investments at October 3, 2020 consisted of certificates of deposit, commercial paper and corporate notes. Fair value measurements for Nucor’s derivatives 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.

The fair value of short-term and long-term debt, including current maturities, was approximately $6.28 billion at October 3, 2020 ($4.81 billion at December 31, 2019). The debt fair value estimates are classified under Level 2 because such estimates are based on readily available market prices of our debt at October 3, 2020 and December 31, 2019, or similar debt with the same maturities, ratings and interest rates.

Disclosures are required for certain assets and liabilities that are measured at fair value, but are recognized and disclosed on a nonrecurring basis in periods subsequent to initial recognition. For Nucor, our equity investment in Duferdofin Nucor was measured at fair value as a result of the impairment charges recorded in the first nine months of 2020 (see Note 5).

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Contingencies

9 Months Ended

Oct. 03, 2020

Commitments And Contingencies Disclosure [Abstract]

Contingencies

8. Contingencies

Nucor is subject to environmental laws and regulations established by federal, state and local authorities and, accordingly, makes provisions for the estimated costs of compliance. Of the undiscounted total of $16.6 million of accrued environmental costs at October 3, 2020 ($16.4 million at December 31, 2019), $6.3 million was classified in accrued expenses and other current liabilities ($4.1 million at December 31, 2019) and $10.3 million was classified in deferred credits and other liabilities ($12.3 million at December 31, 2019). Inherent uncertainties exist in these estimates primarily due to unknown conditions, evolving remediation technology and changing governmental regulations, legal standards and enforcement priorities.

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.

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Stock-Based Compensation

9 Months Ended

Oct. 03, 2020

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-Based Compensation

9. Stock-Based Compensation

Overview

The Company maintains the Nucor Corporation 2014 Omnibus Incentive Compensation Plan (the “Omnibus Plan”) under which the Company may award stock-based compensation to key employees, officers and non-employee directors. The Company’s stockholders approved an amendment and restatement of the Omnibus Plan on May 14, 2020. The

Omnibus Plan permits the award of stock options, restricted stock units, restricted shares and other stock-based awards for up to 19.0 million shares of the Company’s common stock. As of October 3, 2020, 7.8  million shares remained available for award under the Omnibus Plan.

The Company also maintains a number of inactive plans under which stock-based awards remain outstanding but no further awards may be made. As of October 3, 2020, 1.0 million shares were reserved for issuance upon the future settlement of outstanding awards under such inactive plans.

Stock Options

Stock options may be granted to Nucor’s key employees, officers and non-employee directors with exercise prices at 100% of the market value on the date of the grant. The stock options granted are generally exercisable at the end of three years and have a term of 10 years.

A summary of activity under Nucor’s stock option plans for the first nine months of 2020 is as follows (shares 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		3,892		$	50.78
Granted		529		$	42.46
Exercised		-		$	-		$	-
Canceled		(239	)	$	51.58
Outstanding at October 3, 2020		4,182		$	49.68	6.0 years	$	3,846
Stock options exercisable at October 3, 2020		3,435		$	50.36	5.3 years	$	2,189

Stock options granted to employees who are eligible for retirement on the date of the grant are expensed immediately since these awards vest upon retirement from the Company. Retirement, for purposes of vesting in these stock options, means termination of employment after satisfying age and years of service requirements. Similarly, stock options granted to employees who will become retirement-eligible prior to the end of the vesting term are expensed over the period through which the employee will become retirement-eligible. Compensation expense for stock options granted to employees who will not become retirement-eligible prior to the end of the vesting term is recognized on a straight-line basis over the vesting period. Compensation expense for stock options was $0.3 million in the third quarter of both 2020 and 2019 and $2.4 million and $4.4 million in the first nine months of 2020 and 2019, respectively. As of October 3, 2020, unrecognized compensation expense related to stock options was $2.8 million, which is expected to be recognized over a weighted-average period of 2.4 years.

Restricted Stock Units

Nucor annually grants restricted stock units (“RSUs”) to key employees, officers and non-employee directors. The RSUs granted to key employees and officers vest and are converted to common stock in three equal installments on each of the first three anniversaries of the grant date provided that a portion of the RSUs awarded to an officer prior to 2018 vest only upon the officer’s retirement. Retirement, for purposes of vesting in these RSUs only, means termination of employment with approval of the Compensation and Executive Development Committee of the Board of Directors after satisfying age and years of service requirements. RSUs granted to a non-employee director are fully vested on the grant date and are payable to the non-employee director in the form of common stock after the termination of the director’s service on the Board of Directors.

RSUs granted to employees who are eligible for retirement on the date of the grant are expensed immediately, and RSUs granted to employees who will become retirement-eligible prior to the end of the vesting term are expensed over the period through which the employee will become retirement-eligible since these awards vest upon retirement from the Company. Compensation expense for RSUs granted to employees who will not become retirement-eligible prior to the end of the vesting term is recognized on a straight-line basis over the vesting period.

Cash dividend equivalents are paid to holders of RSUs each quarter. Dividend equivalents paid on RSUs expected to vest are recognized as a reduction in retained earnings.

The fair value of an RSU is determined based on the closing price of Nucor’s common stock on the date of the grant.

A summary of Nucor’s RSU activity for the first nine months of 2020 is as follows (shares in thousands):

	Shares			Grant Date Fair Value
Restricted stock units:
Unvested at beginning of year		1,776		$	52.60
Granted		1,246		$	42.46
Vested		(1,140	)	$	50.14
Canceled		(22	)	$	50.17
Unvested at October 3, 2020		1,860		$	47.34

Compensation expense for RSUs was $11.1 million and $11.0 million in the third quarter of 2020 and 2019, respectively, and $47.9 million and $59.1 million in the first nine months of 2020 and 2019, respectively. As of October 3, 2020, unrecognized compensation expense related to unvested RSUs was $64.2 million, which is expected to be recognized over a weighted-average period of 1.5 years.

Restricted Stock Awards

Prior to their expiration effective December 31, 2017, the Nucor Corporation Senior Officers Long-Term Incentive Plan and the Nucor Corporation Senior Officers Annual Incentive Plan authorized the award of shares of common stock to officers subject to certain conditions and restrictions. Effective January 1, 2018, the Company adopted supplements to the Omnibus Plan with terms that permit the award of shares of common stock to officers subject to the conditions and restrictions described below, which are substantially similar to those of the expired Senior Officers Long-Term Incentive Plan and Senior Officers Annual Incentive Plan. The expired Senior Officers Long-Term Incentive Plan, together with the applicable supplement, is referred to below as the “LTIP,” and the expired Senior Officers Annual Incentive Plan, together with the applicable supplement, is referred to below as the “AIP.”

The LTIP provides for the award of shares of restricted common stock at the end of each LTIP performance measurement period at no cost to officers if certain financial performance goals are met during the period. One-third of the LTIP restricted stock award vests upon each of the first three anniversaries of the award date or, if earlier, upon the officer’s attainment of age 55 while employed by Nucor. Although participants are entitled to cash dividends and may vote such awarded shares, the sale or transfer of such shares is limited during the restricted period.

The AIP provides for the payment of annual cash incentive awards. An AIP participant may elect, however, to defer payment of up to one-half of an AIP award. In such event, the deferred AIP award is converted into common stock units and credited with a deferral incentive, in the form of additional common stock units, equal to 25% of the number of common stock units attributable to the deferred AIP award. Common stock units attributable to deferred AIP awards are fully vested. Common stock units credited as a deferral incentive vest upon the AIP participant’s attainment of age 55 while employed by Nucor. Vested common stock units are paid to AIP participants in the form of shares of common stock following their termination of employment with Nucor.

A summary of Nucor’s restricted stock activity under the AIP and the LTIP for the first nine months of 2020 is as follows (shares in thousands):

				Grant Date
	Shares			Fair Value
Restricted stock units and restricted stock awards:
Unvested at beginning of year		147		$	60.81
Granted		348		$	36.15
Vested		(359	)	$	40.98
Canceled		-		$	-
Unvested at October 3, 2020		136		$	49.98

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 $3.3 million and $1.8 million in the third quarter of 2020 and 2019, respectively, and $5.8 million and $10.9 million in the first nine months of 2020 and 2019, respectively. As of October 3, 2020, unrecognized compensation expense related to unvested restricted stock awards was $1.6 million, which is expected to be recognized over a weighted-average period of 1.6 years.

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Employee Benefit Plan

9 Months Ended

Oct. 03, 2020

Compensation And Retirement Disclosure [Abstract]

Employee Benefit Plan

10. 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 $27.5 million and $40.0 million in the third quarter of 2020 and 2019, respectively, and $59.5 million and $163.7 million in the first nine months of 2020 and 2019, respectively. The related liability for these benefits is included in salaries, wages and related accruals in the condensed consolidated balance sheets.

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Interest Expense (Income)

9 Months Ended

Oct. 03, 2020

Banking And Thrift Interest [Abstract]

Interest Expense (Income)

11. Interest Expense (Income):

The components of net interest expense for the third quarter and first nine months of 2020 and 2019 are as follows (in thousands):

	Three Months (13 Weeks) Ended						Nine Months (39 Weeks) Ended
	Oct. 3, 2020			Sept. 28, 2019			Oct. 3, 2020			Sept. 28, 2019
Interest expense	$	42,281		$	40,721		$	128,726		$	119,736
Interest income		(2,142	)		(9,435	)		(11,870	)		(26,977	)
Interest expense, net	$	40,139		$	31,286		$	116,856		$	92,759

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Income Taxes

9 Months Ended

Oct. 03, 2020

Income Tax Disclosure [Abstract]

Income Taxes

12. Income Taxes

The effective tax rate for the third quarter of 2020 was 23.3% as compared to 22.8% for the third quarter of 2019.

Nucor has concluded U.S. federal income tax matters for years through 2016, other than 2015. The tax years 2015 and 2017 through 2019 remain open to examination by the Internal Revenue Service. The 2015 Canadian income tax returns for Harris Steel Group Inc. and certain related affiliates are currently under examination by the Canada Revenue Agency. The tax years 2013 through 2019 remain open to examination by other major taxing jurisdictions to which Nucor is subject (primarily Canada and other state and local jurisdictions). From time to time in the ordinary course of business, Nucor is involved in tax disputes with federal, state and local taxing jurisdictions, which are, individually and in the aggregate, immaterial to Nucor.

Non-current deferred tax liabilities included in deferred credits and other liabilities in the condensed consolidated balance sheets were $575.2 million at October 3, 2020 ($431.0 million at December 31, 2019).

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Stockholders' Equity

9 Months Ended

Oct. 03, 2020

Equity [Abstract]

Stockholders' Equity

13. Stockholders’ Equity

The following tables reflect the changes in stockholders’ equity attributable to both Nucor and the noncontrolling interests of Nucor’s joint ventures, primarily Nucor-Yamato Steel Company (Limited Partnership) of which Nucor owns 51%, for the three months and nine months ended October 3, 2020 and September 28, 2019 (in thousands):

				Three Months (13 Weeks) Ended October 3, 2020
													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 4, 2020	$	10,623,485			380,154	$	152,061	$	2,106,907	$	10,998,533		$	(340,836	)		78,259		$	(2,721,845	)	$	10,194,820		$	428,665
Net earnings		222,630			-		-		-		193,415			-			-			-			193,415			29,215
Other comprehensive income (loss)		25,367			-		-		-		-			25,367			-			-			25,367			-
Stock option expense		263			-		-		263		-			-			-			-			263			-
Issuance of stock under award    plans, net of forfeitures		11,189			-		-		10,012		-			-			(34	)		1,177			11,189			-
Amortization of unearned    compensation		400			-		-		400		-			-			-			-			400			-
Cash dividends declared		(123,039	)		-		-		-		(123,039	)		-			-			-			(123,039	)		-
Distributions to noncontrolling    interests		(43,228	)		-		-		-		-			-			-			-			-			(43,228	)
Other		-			-		-		-		(1	)		-			-			-			(1	)		1
BALANCES, October 3, 2020	$	10,717,067			380,154	$	152,061	$	2,117,582	$	11,068,908		$	(315,469	)		78,225		$	(2,720,668	)	$	10,302,414		$	414,653

				Nine Months (39 Weeks) Ended October 3, 2020
													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, 2019	$	10,791,176			380,154	$	152,061	$	2,107,646	$	11,115,056		$	(302,966	)		78,342		$	(2,713,931	)	$	10,357,866		$	433,310
Net earnings		410,162			-		-		-		322,627			-			-			-			322,627			87,535
Other comprehensive income (loss)		(12,503	)		-		-		-		-			(12,503	)		-			-			(12,503	)		-
Stock option expense		2,402			-		-		2,402		-			-			-			-			2,402			-
Issuance of stock under award    plans, net of forfeitures		38,996			-		-		6,234		-			-			(942	)		32,762			38,996			-
Amortization of unearned    compensation		1,300			-		-		1,300		-			-			-			-			1,300			-
Treasury stock acquired		(39,499	)		-		-		-		-			-			825			(39,499	)		(39,499	)		-
Cash dividends declared		(368,774	)		-		-		-		(368,774	)		-			-			-			(368,774	)		-
Distributions to noncontrolling    interests		(106,193	)		-		-		-		-			-			-			-			-			(106,193	)
Other		-			-		-		-		(1	)		-			-			-			(1	)		1
BALANCES, October 3, 2020	$	10,717,067			380,154	$	152,061	$	2,117,582	$	11,068,908		$	(315,469	)		78,225		$	(2,720,668	)	$	10,302,414		$	414,653

				Three Months (13 Weeks) Ended September 28, 2019
														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, 2019	$	10,698,008			380,154	$	152,061	$	2,098,809		$	10,977,950		$	(297,760	)		76,997		$	(2,630,343	)	$	10,300,717		$	397,291
Net earnings		293,587			-		-		-			275,031			-			-			-			275,031			18,556
Other comprehensive income (loss)		(16,006	)		-		-		-			-			(16,006	)		-			-			(16,006	)		-
Stock option expense		275			-		-		275			-			-			-			-			275			-
Issuance of stock under award    plans, net of forfeitures		11,339			-		-		9,365			-			-			(58	)		1,974			11,339			-
Amortization of unearned    compensation		500			-		-		500			-			-			-			-			500			-
Cash dividends declared		(122,809	)		-		-		-			(122,809	)		-			-			-			(122,809	)		-
Distributions to noncontrolling    interests		(3,861	)		-		-		-			-			-			-			-			-			(3,861	)
Other		-			-		-		(1	)		-			-			-			1			-			-
BALANCES, September 28, 2019	$	10,861,033			380,154	$	152,061	$	2,108,948		$	11,130,172		$	(313,766	)		76,939		$	(2,628,368	)	$	10,449,047		$	411,986

				Nine Months (39 Weeks) Ended September 28, 2019
														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, 2018	$	10,201,968			380,154	$	152,061	$	2,073,715		$	10,337,445		$	(304,133	)		74,562		$	(2,467,010	)	$	9,792,078		$	409,890
Net earnings		1,236,657			-		-		-			1,163,320			-			-			-			1,163,320			73,337
Other comprehensive income (loss)		(11,519	)		-		-		-			-			(11,519	)		-			-			(11,519	)		-
Stock options exercised		5,892			-		-		808			-			-			(153	)		5,084			5,892			-
Stock option expense		4,387			-		-		4,387			-			-			-			-			4,387			-
Issuance of stock under award    plans, net of forfeitures		59,608			-		-		28,540			-			-			(920	)		31,068			59,608			-
Amortization of unearned    compensation		1,500			-		-		1,500			-			-			-			-			1,500			-
Treasury stock acquired		(197,511	)		-		-		-			-			-			3,450			(197,511	)		(197,511	)		-
Cash dividends declared		(368,707	)		-		-		-			(368,707	)		-			-			-			(368,707	)		-
Distributions to noncontrolling    interests		(71,241	)		-		-		-			-			-			-			-			-			(71,241	)
Other		(1	)		-		-		(2	)		(1,886	)		1,886			-			1			(1	)		-
BALANCES, September 28, 2019	$	10,861,033			380,154	$	152,061	$	2,108,948		$	11,130,172		$	(313,766	)		76,939		$	(2,628,368	)	$	10,449,047		$	411,986

Dividends declared per share were $0.4025 per share in the third quarter of 2020 ($0.40 per share in the third quarter of 2019) and $1.2075 per share in the first nine months of 2020 ($1.20 per share in the first nine months of 2019).

On September 6, 2018, the Company announced that the Board of Directors had approved a new share repurchase program under which the Company is authorized to repurchase up to $2.00 billion of the Company’s common stock and terminated any previously authorized share repurchase programs. Share repurchases will be 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 October 3, 2020, the Company had approximately $1.16 billion remaining available for share repurchases under the program.

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Accumulated Other Comprehensive Income (Loss)

9 Months Ended

Oct. 03, 2020

Equity [Abstract]

Accumulated Other Comprehensive Income (Loss)

14. 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 October 3, 2020 and September 28, 2019 (in thousands):

	Three-Month (13-Week) Period Ended
	October 3, 2020
	Gains and Losses on			Foreign Currency			Adjustment to Early
	Hedging Derivatives			Gain (Loss)			Retiree Medical Plan		Total
Accumulated other comprehensive    income (loss) at July 4, 2020	$	(10,900	)	$	(337,743	)	$	7,807	$	(340,836	)
Other comprehensive income (loss)    before reclassifications		6,387			16,867			-		23,254
Amounts reclassified from accumulated    other comprehensive income (loss)    into earnings (1)		2,113			-			-		2,113
Net current-period other comprehensive    income (loss)		8,500			16,867			-		25,367
Accumulated other comprehensive    income (loss) at October 3, 2020	$	(2,400	)	$	(320,876	)	$	7,807	$	(315,469	)

	Nine-Month (39-Week) Period Ended
	October 3, 2020
	Gains and Losses on			Foreign Currency			Adjustment to Early
	Hedging Derivatives			Gain (Loss)			Retiree Medical Plan		Total
Accumulated other comprehensive    income (loss) at December 31, 2019	$	(14,000	)	$	(296,773	)	$	7,807	$	(302,966	)
Other comprehensive income (loss) before    reclassifications		4,888			(24,103	)		-		(19,215	)
Amounts reclassified from accumulated    other comprehensive income (loss)    into earnings (1)		6,712			-			-		6,712
Net current-period other comprehensive income    (loss)		11,600			(24,103	)		-		(12,503	)
Accumulated other comprehensive    income (loss) at October 3, 2020	$	(2,400	)	$	(320,876	)	$	7,807	$	(315,469	)

(1)   Includes $2,113 and $6,712 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 2020, respectively. The tax impacts of those reclassifications were $700 and $2,300 in the third quarter and first nine months of 2020, respectively.

Included in the $320.9 million foreign currency losses at October 3, 2020 are $191.5 million of losses related to our equity method investment in Duferdofin Nucor and $129.4 million of losses related primarily to our Canadian operations.

	Three-Month (13-Week) Period Ended
	September 28, 2019
	Gains and Losses on			Foreign Currency			Adjustment to Early
	Hedging Derivatives			Gain (Loss)			Retiree Medical Plan		Total
Accumulated other comprehensive    income (loss) at June 29, 2019	$	(11,100	)	$	(295,559	)	$	8,899	$	(297,760	)
Other comprehensive income (loss)    before reclassifications		(3,315	)		(14,306	)		-		(17,621	)
Amounts reclassified from accumulated    other comprehensive income (loss)    into earnings (1)		1,615			-			-		1,615
Net current-period other comprehensive    income (loss)		(1,700	)		(14,306	)		-		(16,006	)
Accumulated other comprehensive    income (loss) at September 28, 2019	$	(12,800	)	$	(309,865	)	$	8,899	$	(313,766	)

	Nine-Month (39-Week) Period Ended
	September 28, 2019
	Gains and Losses on			Foreign Currency			Adjustment to Early
	Hedging Derivatives			Gain (Loss)			Retiree Medical Plan		Total
Accumulated other comprehensive    income (loss) at December 31, 2018	$	(6,500	)	$	(304,646	)	$	7,013	$	(304,133	)
Other comprehensive income (loss) before    reclassifications		(7,801	)		(5,219	)		-		(13,020	)
Amounts reclassified from accumulated    other comprehensive income (loss)    into earnings (1)		1,501			-			-		1,501
Net current-period other comprehensive income    (loss)		(6,300	)		(5,219	)		-		(11,519	)
Other		-			-			1,886		1,886
Accumulated other comprehensive    income (loss) at September 28, 2019	$	(12,800	)	$	(309,865	)	$	8,899	$	(313,766	)

(1)   Includes $1,615 and $1,501 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 2019, respectively. The tax impacts of those reclassifications were $500 in both the third quarter and first nine months of 2019.

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Segments

9 Months Ended

Oct. 03, 2020

Segment Reporting [Abstract]

Segments

15. 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 businesses; rebar distribution businesses; and Nucor’s equity method investments in Duferdofin Nucor, NuMit and Nucor-JFE. 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, steel grating, tubular products businesses, piling products business, and wire and wire mesh. The raw materials segment includes The David J. Joseph Company and its affiliates (collectively, “DJJ”), primarily a scrap broker and processor; Nu-Iron Unlimited and Nucor Steel Louisiana LLC, two facilities that produce direct reduced iron (“DRI”) used by the steel mills; and our natural gas production operations.

Net interest expense on long-term debt, charges and credits associated with changes in allowances to eliminate intercompany profit in inventory, profit sharing expense and stock-based compensation are shown under Corporate/eliminations. Corporate assets primarily include cash and cash equivalents, short-term investments, allowances to eliminate intercompany profit in inventory, deferred income tax assets, federal and state income taxes receivable and investment in and advances to affiliates.

Nucor’s results by segment for the third quarter and first nine months of 2020 and 2019 were as follows (in thousands):

	Three Months (13 Weeks) Ended					Nine Months (39 Weeks) Ended
	Oct. 3, 2020		Sept. 28, 2019			Oct. 3, 2020		Sept. 28, 2019
Net sales to external customers:
Steel mills	$	2,842,625	$	3,244,473		$	8,875,856	$	10,897,322
Steel products		1,738,004		1,820,359			4,988,026		5,225,064
Raw materials		347,331		399,670			1,015,721		1,334,726
	$	4,927,960	$	5,464,502		$	14,879,603	$	17,457,112
Intercompany sales:
Steel mills	$	731,942	$	825,237		$	2,264,278	$	2,542,008
Steel products		51,029		57,517			197,603		174,718
Raw materials		1,863,796		2,063,167			5,772,583		6,917,523
Corporate/eliminations		(2,646,767)		(2,945,921	)		(8,234,464)		(9,634,249	)
	$	-	$	-		$	-	$	-
Earnings (loss) before income taxes and    noncontrolling interests:
Steel mills	$	205,152	$	309,939		$	512,082	$	1,578,257
Steel products		186,976		170,214			502,409		363,731
Raw materials		6,232		(10,599	)		(3,068)		64,333
Corporate/eliminations		(107,942)		(89,215	)		(393,651)		(401,744	)
	$	290,418	$	380,339		$	617,772	$	1,604,577

	Oct. 3, 2020		Dec. 31, 2019
Segment assets:
Steel mills	$	9,251,790	$	9,283,216
Steel products		4,399,501		4,610,628
Raw materials		3,172,464		3,316,479
Corporate/eliminations		2,695,522		1,134,343
	$	19,519,277	$	18,344,666

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Revenue

9 Months Ended

Oct. 03, 2020

Revenue From Contract With Customer [Abstract]

Revenue

16. Revenue

The following tables disaggregate our revenue by major source for the third quarter and first nine months of 2020 and 2019 (in thousands):

	Three Months (13 Weeks) Ended October 3, 2020								Nine Months (39 Weeks) Ended October 3, 2020
	Steel Mills		Steel Products		Raw Materials		Total		Steel Mills		Steel Products		Raw Materials		Total
Sheet	$	1,256,537	$	-	$	-	$	1,256,537	$	3,899,970	$	-	$	-	$	3,899,970
Bar		957,216		-		-		957,216		2,830,936		-		-		2,830,936
Structural		362,192		-		-		362,192		1,159,949		-		-		1,159,949
Plate		266,680		-		-		266,680		985,001		-		-		985,001
Tubular Products		-		274,915		-		274,915		-		830,283		-		830,283
Rebar Fabrication		-		463,286		-		463,286		-		1,300,518		-		1,300,518
Other Steel Products		-		999,803		-		999,803		-		2,857,225		-		2,857,225
Raw Materials		-		-		347,331		347,331		-		-		1,015,721		1,015,721
	$	2,842,625	$	1,738,004	$	347,331	$	4,927,960	$	8,875,856	$	4,988,026	$	1,015,721	$	14,879,603

	Three Months (13 Weeks) Ended September 28, 2019								Nine Months (39 Weeks) Ended September 28, 2019
	Steel Mills		Steel Products		Raw Materials		Total		Steel Mills		Steel Products		Raw Materials		Total
Sheet	$	1,513,884	$	-	$	-	$	1,513,884	$	5,071,027	$	-	$	-	$	5,071,027
Bar		979,082		-		-		979,082		3,173,289		-		-		3,173,289
Structural		378,670		-		-		378,670		1,214,355		-		-		1,214,355
Plate		372,837		-		-		372,837		1,438,651		-		-		1,438,651
Tubular Products		-		296,519		-		296,519		-		919,711		-		919,711
Rebar Fabrication		-		469,180		-		469,180		-		1,249,912		-		1,249,912
Other Steel Products		-		1,054,660		-		1,054,660		-		3,055,441		-		3,055,441
Raw Materials		-		-		399,670		399,670		-		-		1,334,726		1,334,726
	$	3,244,473	$	1,820,359	$	399,670	$	5,464,502	$	10,897,322	$	5,225,064	$	1,334,726	$	17,457,112

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 $114.3 million as of October 3, 2020 ($108.6 million as of December 31, 2019), and are included in accrued expenses and other current liabilities in the condensed consolidated balance sheets.

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Earnings Per Share

9 Months Ended

Oct. 03, 2020

Earnings Per Share [Abstract]

Earnings Per Share

17. Earnings Per Share

The computations of basic and diluted net earnings per share for the third quarter and first nine months of 2020 and 2019 are as follows (in thousands, except per share amounts):

	Three Months (13 Weeks) Ended						Nine Months (39 Weeks) Ended
	Oct. 3, 2020			Sept. 28, 2019			Oct. 3, 2020			Sept. 28, 2019
Basic net earnings per share:
Basic net earnings	$	193,415		$	275,031		$	322,627		$	1,163,320
Earnings allocated to participating securities		(1,201	)		(1,655	)		(2,182	)		(6,295	)
Net earnings available to common stockholders	$	192,214		$	273,376		$	320,445		$	1,157,025
Basic average shares outstanding		303,394			304,637			303,072			305,553
Basic net earnings per share	$	0.63		$	0.90		$	1.06		$	3.79
Diluted net earnings per share:
Diluted net earnings	$	193,415		$	275,031		$	322,627		$	1,163,320
Earnings allocated to participating securities		(1,202	)		(1,656	)		(2,182	)		(6,295	)
Net earnings available to common stockholders	$	192,213		$	273,375		$	320,445		$	1,157,025
Diluted average shares outstanding:
Basic average shares outstanding		303,394			304,637			303,072			305,553
Dilutive effect of stock options and other		47			343			27			476
		303,441			304,980			303,099			306,029
Diluted net earnings per share	$	0.63		$	0.90		$	1.06		$	3.78

The following stock options were excluded from the computation of diluted net earnings per share for the third quarter and first nine months of 2020 and 2019 because their effect would have been anti-dilutive (shares in thousands):

	Three Months (13 Weeks) Ended				Nine Months (39 Weeks) Ended
	Oct. 3, 2020		Sept. 28, 2019		Oct. 3, 2020		Sept. 28, 2019
Anti-dilutive stock options:
Weighted-average shares		3,463		963		3,638		963
Weighted-average exercise price	$	51.38	$	60.92	$	51.15	$	60.92

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Restricted Cash and Cash Equivalents

9 Months Ended

Oct. 03, 2020

Restricted Cash And Cash Equivalents [Abstract]

Restricted Cash and Cash Equivalents

18. Restricted Cash and Cash Equivalents

As of October 3, 2020, restricted cash and cash equivalents totaled $131.6 million, and primarily consisted of net proceeds from the issuance of $162.6 million in 40-year variable-rate Green Bonds in July 2020. The restricted cash and cash equivalents are held in a trust account and are to be used to partially fund the capital costs, in particular the expenditures associated with pollution prevention and control including waste recycling, associated with the construction of Nucor’s plate mill located in Brandenburg, Kentucky. Funds are disbursed from the trust account as qualified expenditures for the construction of the Brandenburg facility are made ($31.0 million in the third quarter of 2020). Interest earned on funds held in the trust account is subject to the same usage requirements as the bond proceeds principle. Since the restricted cash and interest and dividends must be used for the construction of the Brandenburg facility and relate to a long-term liability, the entire balance has been classified as a non-current asset.

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Debt

9 Months Ended

Oct. 03, 2020

Debt Disclosure [Abstract]

Debt

19. Debt

In May 2020, Nucor issued $500.0 million of 2.000% Notes due 2025 and $500.0 million of 2.700% Notes due 2030. Net proceeds of the issuances were $989.4 million. Costs of $8.4 million associated with the issuances have been capitalized and will be amortized over the life of the notes.

In July 2020, Nucor became an obligor with respect to $162.6 million in 40-year variable-rate Green Bonds to partially fund the capital costs, in particular the expenditures associated with pollution prevention and control including waste recycling, associated with the construction of Nucor’s plate mill located in Brandenburg, Kentucky. The net proceeds from the debt issuance are being held in a trust account pending disbursement for the construction of the facility.

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Subsequent Event

9 Months Ended

Oct. 03, 2020

Subsequent Events [Abstract]

Subsequent Event

20. Subsequent Event

Subsequent to the end of the third quarter of 2020, we received certification of state income tax credits that will result in an approximately $40 million net benefit to our provision for income taxes in the fourth quarter of 2020.

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Goodwill and Other Intangible Assets (Tables)

9 Months Ended

Oct. 03, 2020

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 October 3, 2020 by segment was as follows (in thousands):

	Steel Mills		Steel Products			Raw Materials		Total
Balance at December 31, 2019	$	591,986	$	879,500		$	729,577	$	2,201,063
Other		-		(821	)		-		(821	)
Translation		-		(4,454	)		-		(4,454	)
Balance at October 3, 2020	$	591,986	$	874,225		$	729,577	$	2,195,788

Schedule of Intangible Assets

Intangible assets with estimated useful lives of five to 22 years are amortized on a straight-line or accelerated basis and were comprised of the following as of October 3, 2020 and December 31, 2019 (in thousands):

	October 3, 2020				December 31, 2019
	Gross Amount		Accumulated Amortization		Gross Amount		Accumulated Amortization
Customer relationships	$	1,412,323	$	821,029	$	1,412,954	$	767,532
Trademarks and trade names		162,062		98,110		162,183		92,258
Other		63,822		40,510		63,807		36,968
	$	1,638,207	$	959,649	$	1,638,944	$	896,758

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Fair Value Measurements (Tables)

9 Months Ended

Oct. 03, 2020

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 October 3, 2020 and December 31, 2019 (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 Amount in Condensed Consolidated Balance Sheets			Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
As of October 3, 2020
Assets:
Cash equivalents	$	2,539,777		$	2,539,777	$	-		$	-
Short-term investments		412,401			412,401		-			-
Restricted cash and cash equivalents		131,623			131,623
Total assets	$	3,083,801		$	3,083,801	$	-		$	-
Liabilities:
Derivative contracts	$	(6,577	)	$	-	$	(6,577	)	$	-
As of December 31, 2019
Assets:
Cash equivalents	$	1,229,000		$	1,229,000	$	-		$	-
Short-term investments		300,040			300,040		-			-
Total assets	$	1,529,040		$	1,529,040	$	-		$	-
Liabilities:
Derivative contracts	$	(19,599	)	$	-	$	(19,599	)	$	-

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Stock-Based Compensation (Tables)

9 Months Ended

Oct. 03, 2020

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock Option Plans Activity

A summary of activity under Nucor’s stock option plans for the first nine months of 2020 is as follows (shares 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		3,892		$	50.78
Granted		529		$	42.46
Exercised		-		$	-		$	-
Canceled		(239	)	$	51.58
Outstanding at October 3, 2020		4,182		$	49.68	6.0 years	$	3,846
Stock options exercisable at October 3, 2020		3,435		$	50.36	5.3 years	$	2,189

Summary of Nucor's RSU Activity

A summary of Nucor’s RSU activity for the first nine months of 2020 is as follows (shares in thousands):

	Shares			Grant Date Fair Value
Restricted stock units:
Unvested at beginning of year		1,776		$	52.60
Granted		1,246		$	42.46
Vested		(1,140	)	$	50.14
Canceled		(22	)	$	50.17
Unvested at October 3, 2020		1,860		$	47.34

Summary of Nucor's Restricted Stock Activity under AIP and LTIP

A summary of Nucor’s restricted stock activity under the AIP and the LTIP for the first nine months of 2020 is as follows (shares in thousands):

				Grant Date
	Shares			Fair Value
Restricted stock units and restricted stock awards:
Unvested at beginning of year		147		$	60.81
Granted		348		$	36.15
Vested		(359	)	$	40.98
Canceled		-		$	-
Unvested at October 3, 2020		136		$	49.98

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Interest Expense (Income) (Tables)

9 Months Ended

Oct. 03, 2020

Banking And Thrift Interest [Abstract]

Schedule of Components of Net Interest Expense

The components of net interest expense for the third quarter and first nine months of 2020 and 2019 are as follows (in thousands):

	Three Months (13 Weeks) Ended						Nine Months (39 Weeks) Ended
	Oct. 3, 2020			Sept. 28, 2019			Oct. 3, 2020			Sept. 28, 2019
Interest expense	$	42,281		$	40,721		$	128,726		$	119,736
Interest income		(2,142	)		(9,435	)		(11,870	)		(26,977	)
Interest expense, net	$	40,139		$	31,286		$	116,856		$	92,759

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Stockholders' Equity (Tables)

9 Months Ended

Oct. 03, 2020

Equity [Abstract]

Schedule of Changes in Stockholders' Equity

The following tables reflect the changes in stockholders’ equity attributable to both Nucor and the noncontrolling interests of Nucor’s joint ventures, primarily Nucor-Yamato Steel Company (Limited Partnership) of which Nucor owns 51%, for the three months and nine months ended October 3, 2020 and September 28, 2019 (in thousands):

				Three Months (13 Weeks) Ended October 3, 2020
													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 4, 2020	$	10,623,485			380,154	$	152,061	$	2,106,907	$	10,998,533		$	(340,836	)		78,259		$	(2,721,845	)	$	10,194,820		$	428,665
Net earnings		222,630			-		-		-		193,415			-			-			-			193,415			29,215
Other comprehensive income (loss)		25,367			-		-		-		-			25,367			-			-			25,367			-
Stock option expense		263			-		-		263		-			-			-			-			263			-
Issuance of stock under award    plans, net of forfeitures		11,189			-		-		10,012		-			-			(34	)		1,177			11,189			-
Amortization of unearned    compensation		400			-		-		400		-			-			-			-			400			-
Cash dividends declared		(123,039	)		-		-		-		(123,039	)		-			-			-			(123,039	)		-
Distributions to noncontrolling    interests		(43,228	)		-		-		-		-			-			-			-			-			(43,228	)
Other		-			-		-		-		(1	)		-			-			-			(1	)		1
BALANCES, October 3, 2020	$	10,717,067			380,154	$	152,061	$	2,117,582	$	11,068,908		$	(315,469	)		78,225		$	(2,720,668	)	$	10,302,414		$	414,653

				Nine Months (39 Weeks) Ended October 3, 2020
													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, 2019	$	10,791,176			380,154	$	152,061	$	2,107,646	$	11,115,056		$	(302,966	)		78,342		$	(2,713,931	)	$	10,357,866		$	433,310
Net earnings		410,162			-		-		-		322,627			-			-			-			322,627			87,535
Other comprehensive income (loss)		(12,503	)		-		-		-		-			(12,503	)		-			-			(12,503	)		-
Stock option expense		2,402			-		-		2,402		-			-			-			-			2,402			-
Issuance of stock under award    plans, net of forfeitures		38,996			-		-		6,234		-			-			(942	)		32,762			38,996			-
Amortization of unearned    compensation		1,300			-		-		1,300		-			-			-			-			1,300			-
Treasury stock acquired		(39,499	)		-		-		-		-			-			825			(39,499	)		(39,499	)		-
Cash dividends declared		(368,774	)		-		-		-		(368,774	)		-			-			-			(368,774	)		-
Distributions to noncontrolling    interests		(106,193	)		-		-		-		-			-			-			-			-			(106,193	)
Other		-			-		-		-		(1	)		-			-			-			(1	)		1
BALANCES, October 3, 2020	$	10,717,067			380,154	$	152,061	$	2,117,582	$	11,068,908		$	(315,469	)		78,225		$	(2,720,668	)	$	10,302,414		$	414,653

				Three Months (13 Weeks) Ended September 28, 2019
														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, 2019	$	10,698,008			380,154	$	152,061	$	2,098,809		$	10,977,950		$	(297,760	)		76,997		$	(2,630,343	)	$	10,300,717		$	397,291
Net earnings		293,587			-		-		-			275,031			-			-			-			275,031			18,556
Other comprehensive income (loss)		(16,006	)		-		-		-			-			(16,006	)		-			-			(16,006	)		-
Stock option expense		275			-		-		275			-			-			-			-			275			-
Issuance of stock under award    plans, net of forfeitures		11,339			-		-		9,365			-			-			(58	)		1,974			11,339			-
Amortization of unearned    compensation		500			-		-		500			-			-			-			-			500			-
Cash dividends declared		(122,809	)		-		-		-			(122,809	)		-			-			-			(122,809	)		-
Distributions to noncontrolling    interests		(3,861	)		-		-		-			-			-			-			-			-			(3,861	)
Other		-			-		-		(1	)		-			-			-			1			-			-
BALANCES, September 28, 2019	$	10,861,033			380,154	$	152,061	$	2,108,948		$	11,130,172		$	(313,766	)		76,939		$	(2,628,368	)	$	10,449,047		$	411,986

				Nine Months (39 Weeks) Ended September 28, 2019
														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, 2018	$	10,201,968			380,154	$	152,061	$	2,073,715		$	10,337,445		$	(304,133	)		74,562		$	(2,467,010	)	$	9,792,078		$	409,890
Net earnings		1,236,657			-		-		-			1,163,320			-			-			-			1,163,320			73,337
Other comprehensive income (loss)		(11,519	)		-		-		-			-			(11,519	)		-			-			(11,519	)		-
Stock options exercised		5,892			-		-		808			-			-			(153	)		5,084			5,892			-
Stock option expense		4,387			-		-		4,387			-			-			-			-			4,387			-
Issuance of stock under award    plans, net of forfeitures		59,608			-		-		28,540			-			-			(920	)		31,068			59,608			-
Amortization of unearned    compensation		1,500			-		-		1,500			-			-			-			-			1,500			-
Treasury stock acquired		(197,511	)		-		-		-			-			-			3,450			(197,511	)		(197,511	)		-
Cash dividends declared		(368,707	)		-		-		-			(368,707	)		-			-			-			(368,707	)		-
Distributions to noncontrolling    interests		(71,241	)		-		-		-			-			-			-			-			-			(71,241	)
Other		(1	)		-		-		(2	)		(1,886	)		1,886			-			1			(1	)		-
BALANCES, September 28, 2019	$	10,861,033			380,154	$	152,061	$	2,108,948		$	11,130,172		$	(313,766	)		76,939		$	(2,628,368	)	$	10,449,047		$	411,986

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Accumulated Other Comprehensive Income (Loss) (Tables)

9 Months Ended

Oct. 03, 2020

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 October 3, 2020 and September 28, 2019 (in thousands):

	Three-Month (13-Week) Period Ended
	October 3, 2020
	Gains and Losses on			Foreign Currency			Adjustment to Early
	Hedging Derivatives			Gain (Loss)			Retiree Medical Plan		Total
Accumulated other comprehensive    income (loss) at July 4, 2020	$	(10,900	)	$	(337,743	)	$	7,807	$	(340,836	)
Other comprehensive income (loss)    before reclassifications		6,387			16,867			-		23,254
Amounts reclassified from accumulated    other comprehensive income (loss)    into earnings (1)		2,113			-			-		2,113
Net current-period other comprehensive    income (loss)		8,500			16,867			-		25,367
Accumulated other comprehensive    income (loss) at October 3, 2020	$	(2,400	)	$	(320,876	)	$	7,807	$	(315,469	)

	Nine-Month (39-Week) Period Ended
	October 3, 2020
	Gains and Losses on			Foreign Currency			Adjustment to Early
	Hedging Derivatives			Gain (Loss)			Retiree Medical Plan		Total
Accumulated other comprehensive    income (loss) at December 31, 2019	$	(14,000	)	$	(296,773	)	$	7,807	$	(302,966	)
Other comprehensive income (loss) before    reclassifications		4,888			(24,103	)		-		(19,215	)
Amounts reclassified from accumulated    other comprehensive income (loss)    into earnings (1)		6,712			-			-		6,712
Net current-period other comprehensive income    (loss)		11,600			(24,103	)		-		(12,503	)
Accumulated other comprehensive    income (loss) at October 3, 2020	$	(2,400	)	$	(320,876	)	$	7,807	$	(315,469	)

(1)   Includes $2,113 and $6,712 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 2020, respectively. The tax impacts of those reclassifications were $700 and $2,300 in the third quarter and first nine months of 2020, respectively.

Included in the $320.9 million foreign currency losses at October 3, 2020 are $191.5 million of losses related to our equity method investment in Duferdofin Nucor and $129.4 million of losses related primarily to our Canadian operations.

	Three-Month (13-Week) Period Ended
	September 28, 2019
	Gains and Losses on			Foreign Currency			Adjustment to Early
	Hedging Derivatives			Gain (Loss)			Retiree Medical Plan		Total
Accumulated other comprehensive    income (loss) at June 29, 2019	$	(11,100	)	$	(295,559	)	$	8,899	$	(297,760	)
Other comprehensive income (loss)    before reclassifications		(3,315	)		(14,306	)		-		(17,621	)
Amounts reclassified from accumulated    other comprehensive income (loss)    into earnings (1)		1,615			-			-		1,615
Net current-period other comprehensive    income (loss)		(1,700	)		(14,306	)		-		(16,006	)
Accumulated other comprehensive    income (loss) at September 28, 2019	$	(12,800	)	$	(309,865	)	$	8,899	$	(313,766	)

	Nine-Month (39-Week) Period Ended
	September 28, 2019
	Gains and Losses on			Foreign Currency			Adjustment to Early
	Hedging Derivatives			Gain (Loss)			Retiree Medical Plan		Total
Accumulated other comprehensive    income (loss) at December 31, 2018	$	(6,500	)	$	(304,646	)	$	7,013	$	(304,133	)
Other comprehensive income (loss) before    reclassifications		(7,801	)		(5,219	)		-		(13,020	)
Amounts reclassified from accumulated    other comprehensive income (loss)    into earnings (1)		1,501			-			-		1,501
Net current-period other comprehensive income    (loss)		(6,300	)		(5,219	)		-		(11,519	)
Other		-			-			1,886		1,886
Accumulated other comprehensive    income (loss) at September 28, 2019	$	(12,800	)	$	(309,865	)	$	8,899	$	(313,766	)

(1)   Includes $1,615 and $1,501 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 2019, respectively. The tax impacts of those reclassifications were $500 in both the third quarter and first nine months of 2019.

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Segments (Tables)

9 Months Ended

Oct. 03, 2020

Segment Reporting [Abstract]

Segments

Nucor’s results by segment for the third quarter and first nine months of 2020 and 2019 were as follows (in thousands):

	Three Months (13 Weeks) Ended					Nine Months (39 Weeks) Ended
	Oct. 3, 2020		Sept. 28, 2019			Oct. 3, 2020		Sept. 28, 2019
Net sales to external customers:
Steel mills	$	2,842,625	$	3,244,473		$	8,875,856	$	10,897,322
Steel products		1,738,004		1,820,359			4,988,026		5,225,064
Raw materials		347,331		399,670			1,015,721		1,334,726
	$	4,927,960	$	5,464,502		$	14,879,603	$	17,457,112
Intercompany sales:
Steel mills	$	731,942	$	825,237		$	2,264,278	$	2,542,008
Steel products		51,029		57,517			197,603		174,718
Raw materials		1,863,796		2,063,167			5,772,583		6,917,523
Corporate/eliminations		(2,646,767)		(2,945,921	)		(8,234,464)		(9,634,249	)
	$	-	$	-		$	-	$	-
Earnings (loss) before income taxes and    noncontrolling interests:
Steel mills	$	205,152	$	309,939		$	512,082	$	1,578,257
Steel products		186,976		170,214			502,409		363,731
Raw materials		6,232		(10,599	)		(3,068)		64,333
Corporate/eliminations		(107,942)		(89,215	)		(393,651)		(401,744	)
	$	290,418	$	380,339		$	617,772	$	1,604,577

	Oct. 3, 2020		Dec. 31, 2019
Segment assets:
Steel mills	$	9,251,790	$	9,283,216
Steel products		4,399,501		4,610,628
Raw materials		3,172,464		3,316,479
Corporate/eliminations		2,695,522		1,134,343
	$	19,519,277	$	18,344,666

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Revenue (Tables)

9 Months Ended

Oct. 03, 2020

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 2020 and 2019 (in thousands):

	Three Months (13 Weeks) Ended October 3, 2020								Nine Months (39 Weeks) Ended October 3, 2020
	Steel Mills		Steel Products		Raw Materials		Total		Steel Mills		Steel Products		Raw Materials		Total
Sheet	$	1,256,537	$	-	$	-	$	1,256,537	$	3,899,970	$	-	$	-	$	3,899,970
Bar		957,216		-		-		957,216		2,830,936		-		-		2,830,936
Structural		362,192		-		-		362,192		1,159,949		-		-		1,159,949
Plate		266,680		-		-		266,680		985,001		-		-		985,001
Tubular Products		-		274,915		-		274,915		-		830,283		-		830,283
Rebar Fabrication		-		463,286		-		463,286		-		1,300,518		-		1,300,518
Other Steel Products		-		999,803		-		999,803		-		2,857,225		-		2,857,225
Raw Materials		-		-		347,331		347,331		-		-		1,015,721		1,015,721
	$	2,842,625	$	1,738,004	$	347,331	$	4,927,960	$	8,875,856	$	4,988,026	$	1,015,721	$	14,879,603

	Three Months (13 Weeks) Ended September 28, 2019								Nine Months (39 Weeks) Ended September 28, 2019
	Steel Mills		Steel Products		Raw Materials		Total		Steel Mills		Steel Products		Raw Materials		Total
Sheet	$	1,513,884	$	-	$	-	$	1,513,884	$	5,071,027	$	-	$	-	$	5,071,027
Bar		979,082		-		-		979,082		3,173,289		-		-		3,173,289
Structural		378,670		-		-		378,670		1,214,355		-		-		1,214,355
Plate		372,837		-		-		372,837		1,438,651		-		-		1,438,651
Tubular Products		-		296,519		-		296,519		-		919,711		-		919,711
Rebar Fabrication		-		469,180		-		469,180		-		1,249,912		-		1,249,912
Other Steel Products		-		1,054,660		-		1,054,660		-		3,055,441		-		3,055,441
Raw Materials		-		-		399,670		399,670		-		-		1,334,726		1,334,726
	$	3,244,473	$	1,820,359	$	399,670	$	5,464,502	$	10,897,322	$	5,225,064	$	1,334,726	$	17,457,112

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Earnings Per Share (Tables)

9 Months Ended

Oct. 03, 2020

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 2020 and 2019 are as follows (in thousands, except per share amounts):

	Three Months (13 Weeks) Ended						Nine Months (39 Weeks) Ended
	Oct. 3, 2020			Sept. 28, 2019			Oct. 3, 2020			Sept. 28, 2019
Basic net earnings per share:
Basic net earnings	$	193,415		$	275,031		$	322,627		$	1,163,320
Earnings allocated to participating securities		(1,201	)		(1,655	)		(2,182	)		(6,295	)
Net earnings available to common stockholders	$	192,214		$	273,376		$	320,445		$	1,157,025
Basic average shares outstanding		303,394			304,637			303,072			305,553
Basic net earnings per share	$	0.63		$	0.90		$	1.06		$	3.79
Diluted net earnings per share:
Diluted net earnings	$	193,415		$	275,031		$	322,627		$	1,163,320
Earnings allocated to participating securities		(1,202	)		(1,656	)		(2,182	)		(6,295	)
Net earnings available to common stockholders	$	192,213		$	273,375		$	320,445		$	1,157,025
Diluted average shares outstanding:
Basic average shares outstanding		303,394			304,637			303,072			305,553
Dilutive effect of stock options and other		47			343			27			476
		303,441			304,980			303,099			306,029
Diluted net earnings per share	$	0.63		$	0.90		$	1.06		$	3.78

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 2020 and 2019 because their effect would have been anti-dilutive (shares in thousands):

	Three Months (13 Weeks) Ended				Nine Months (39 Weeks) Ended
	Oct. 3, 2020		Sept. 28, 2019		Oct. 3, 2020		Sept. 28, 2019
Anti-dilutive stock options:
Weighted-average shares		3,463		963		3,638		963
Weighted-average exercise price	$	51.38	$	60.92	$	51.15	$	60.92

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Inventories - Additional Information (Detail)	Oct. 03, 2020	Dec. 31, 2019
Inventory Disclosure [Abstract]
Raw materials and supplies in inventory, percentage	40.00%	42.00%
Finished and semi-finished products in inventory, percentage	60.00%	58.00%

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Property, Plant and Equipment - Additional Information (Detail) $ in Thousands	3 Months Ended
	Dec. 31, 2019 USD ($)	Oct. 03, 2020 USD ($) a
Property, Plant and Equipment [Line Items]
Accumulated depreciation	$ 9,420,000	$ 9,870,000
Property, plant and equipment, net	6,178,555	6,829,733
Carrying Value of One Field of Wells [Member]
Property, Plant and Equipment [Line Items]
Non-cash impairment charge	35,000
Property, plant and equipment, net	12,300	11,200
Carrying Value of Two Field of Wells [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 66,600	62,400
Unproved Oil and Natural Gas Properties [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net		$ 165,000
Ownership percentage of leasehold interest in unproved oil and natural gas properties		49.00%
Unproved oil and gas properties area | a		54,000

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Goodwill and Other Intangible Assets - Schedule of Change in Net Carrying Amount of Goodwill by Segment (Detail) $ in Thousands	9 Months Ended
	Oct. 03, 2020 USD ($)
Goodwill [Line Items]
Balance, beginning of period	$ 2,201,063
Other	(821)
Translation	(4,454)
Balance, end of period	2,195,788
Steel Mills [Member]
Goodwill [Line Items]
Balance, beginning of period	591,986
Balance, end of period	591,986
Steel Products [Member]
Goodwill [Line Items]
Balance, beginning of period	879,500
Other	(821)
Translation	(4,454)
Balance, end of period	874,225
Raw Materials [Member]
Goodwill [Line Items]
Balance, beginning of period	729,577
Balance, end of period	$ 729,577

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Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)	3 Months Ended			9 Months Ended
	Oct. 03, 2020	Dec. 31, 2019	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Finite And Indefinite Lived Intangible Assets [Line Items]
Impairment of goodwill		$ 0
Goodwill	$ 2,195,788,000	2,201,063,000		$ 2,195,788,000
Finite-lived intangible assets	678,558,000	$ 742,186,000		678,558,000
Intangible asset amortization expense	20,700,000		$ 22,000,000.0	62,900,000	$ 64,700,000
Future amortization expense, in 2020	83,500,000			83,500,000
Future amortization expense, in 2021	82,300,000			82,300,000
Future amortization expense, in 2022	80,700,000			80,700,000
Future amortization expense, in 2023	80,000,000.0			80,000,000.0
Future amortization expense, in 2024	79,200,000			$ 79,200,000
Minimum [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Intangible assets, useful life				5 years
Maximum [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Intangible assets, useful life				22 years
Rebar Fabrication [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Percentage of fair value exceeded carrying value		56.00%
Goodwill	352,700,000	$ 356,600,000		$ 352,700,000
Finite-lived intangible assets	59,600,000	67,200,000		59,600,000
Grating unit [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Percentage of fair value exceeded carrying value			17.00%
Goodwill	$ 36,600,000	$ 36,800,000		$ 36,600,000

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Goodwill and Other Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands	Oct. 03, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Amount	$ 1,638,207	$ 1,638,944
Intangible assets, Accumulated Amortization	959,649	896,758
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Amount	1,412,323	1,412,954
Intangible assets, Accumulated Amortization	821,029	767,532
Trademarks and Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Amount	162,062	162,183
Intangible assets, Accumulated Amortization	98,110	92,258
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Amount	63,822	63,807
Intangible assets, Accumulated Amortization	$ 40,510	$ 36,968

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Equity Investments - Additional Information (Detail) € in Millions	3 Months Ended				9 Months Ended		12 Months Ended
	Oct. 03, 2020 USD ($)	Jul. 04, 2020 USD ($)	Apr. 04, 2020 USD ($)	Sep. 28, 2019 USD ($)	Oct. 03, 2020 USD ($) Sheet	Sep. 28, 2019 USD ($)	Dec. 31, 2019 USD ($)	Oct. 03, 2020 EUR (€)	Oct. 02, 2020	Apr. 04, 2020 EUR (€)	Dec. 31, 2019 EUR (€)	Jan. 16, 2019
Schedule Of Equity Method Investments [Line Items]
Equity method investments	$ 521,200,000				$ 521,200,000		$ 793,200,000
Amortization					62,877,000	$ 64,655,000
NuMit LLC [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method investments	$ 322,500,000				$ 322,500,000		319,800,000
Equity method investment, ownership percentage	50.00%				50.00%			50.00%
Period used for lag basis, in months					1 month
Distributions from affiliates					$ 2,000,000.0	27,400,000
Steel Technologies LLC [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	100.00%				100.00%			100.00%
Number of sheet processing facilities operated by Steel Technologies | Sheet					26
Duferdofin Nucor S.r.l. [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method investments	$ 100,000				$ 100,000		263,000,000.0
Equity method investment, ownership percentage	50.00%				50.00%			50.00%	50.00%
Period used for lag basis, in months					1 month
Equity method investments, share of net assets	$ 128,600,000				$ 128,600,000
Equity method investments impairment charges	6,600,000	$ 5,000,000.0	$ 250,000,000.0		261,600,000
Basis difference due to the step-up to fair value of certain assets and liabilities	(128,500,000)				(128,500,000)
Step-up to fair value of equity method investment, portion related to identification of goodwill							86,500,000
Amortization	(1,900,000)			$ 2,200,000	(1,600,000)	$ 6,700,000
Due from related parties, noncurrent	41,000,000.0				$ 41,000,000.0		39,300,000	€ 35.0			€ 35.0
Interest rate per year in excess of Euribor as of date of the notes					0.75%
Equity method investments notes payable with parent company, maturity date					Jan. 31, 2022
Equity method investment, remaining ownership percentage									50.00%
Due from related parties			$ 41,000,000.0							€ 35.0
Duferdofin Nucor S.r.l. [Member] | Facility A [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method investments credit facilities subject to guarantee, amount	187,500,000				$ 187,500,000			160.0
Total amount outstanding under equity method investments credit facilities	$ 154,700,000				$ 154,700,000		164,900,000	€ 132.0			€ 147.0
Guarantor obligation percentage of exposure in case of default	50.00%				50.00%			50.00%
Line of credit facility, maturity period					Apr. 16, 2021
Nucor-JFE [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method investments	$ 150,300,000				$ 150,300,000		163,200,000
Equity method investment, ownership percentage	50.00%				50.00%			50.00%				50.00%
Principal amount subject to guarantee for other credit facilities	$ 25,000,000.0				$ 25,000,000.0		25,000,000.0
Nucor-JFE [Member] | General Financing Agreement and Promissory Note [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method investments credit facilities subject to guarantee, amount	65,000,000.0				65,000,000.0
Total amount outstanding under equity method investments credit facilities	$ 45,000,000.0				$ 45,000,000.0		$ 0
Guarantor obligation percentage of exposure in case of default	50.00%				50.00%			50.00%

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Current Liabilities - Additional Information (Detail) - USD ($) $ in Millions	Oct. 03, 2020	Dec. 31, 2019
Liabilities Current [Abstract]
Book overdrafts	$ 115.2	$ 116.4
Dividends payable, current	123.0	122.9
Accrued vacation and holiday pay	$ 121.8	$ 106.2

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Fair Value Measurements - Schedule of Financial Assets and Liabilities Measured at Fair Value (Detail) - USD ($) $ in Thousands	Oct. 03, 2020	Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term investments	$ 412,401	$ 300,040
Total assets	19,519,277	18,344,666
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	2,539,777	1,229,000
Short-term investments	412,401	300,040
Restricted cash and cash equivalents	131,623
Total assets	3,083,801	1,529,040
Derivative contracts	(6,577)	(19,599)
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	2,539,777	1,229,000
Short-term investments	412,401	300,040
Restricted cash and cash equivalents	131,623
Total assets	3,083,801	1,529,040
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative contracts	$ (6,577)	$ (19,599)

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Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Millions	Oct. 03, 2020	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Fair value of short-term and long-term debt, including current maturities	$ 6,280	$ 4,810

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Contingencies - Additional Information (Detail) - USD ($) $ in Millions	Oct. 03, 2020	Dec. 31, 2019
Commitments And Contingencies Disclosure [Abstract]
Accrual for environmental loss contingencies, gross	$ 16.6	$ 16.4
Accrued environmental loss contingencies, current	6.3	4.1
Accrued environmental loss contingencies, noncurrent	$ 10.3	$ 12.3

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Stock-Based Compensation - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019	May 14, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options exercise prices as percentage of the market value on the date of the grant			100.00%
Compensation expenses for stock options	$ 0.3	$ 0.3	$ 2.4	$ 4.4
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options vesting period			3 years
Stock options term, years			10 years
Unrecognized compensation expense related to stock	2.8		$ 2.8
Weighted-average recognition period for unrecognized compensation expense related to stock (years)			2 years 4 months 24 days
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to stock	64.2		$ 64.2
Weighted-average recognition period for unrecognized compensation expense related to stock (years)			1 year 6 months
Compensation expense	$ 11.1	11.0	$ 47.9	59.1
Omnibus Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation, common stock available for grant	7,800,000		7,800,000
Omnibus Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation, common stock available for grant					19,000,000.0
Inactive Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance	1,000,000.0		1,000,000.0
LTIP [Member] | Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Eligible age of officer for restricted stock award			55 years
AIP [Member] | Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Eligible age of officer for restricted stock award			55 years
Additional common stock units for election of deferred annual incentive award, percentage			25.00%
AIP and LTIP [Member] | Restricted Stock Awards and Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to stock	$ 1.6		$ 1.6
Weighted-average recognition period for unrecognized compensation expense related to stock (years)			1 year 7 months 6 days
Compensation expense	$ 3.3	$ 1.8	$ 5.8	$ 10.9

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Stock-Based Compensation - Schedule of Stock Option Plans Activity (Detail) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Oct. 03, 2020 USD ($) $ / shares shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Outstanding at beginning of year, Shares | shares	3,892
Granted, Shares | shares	529
Canceled, Shares | shares	(239)
Outstanding at end of year, Shares | shares	4,182
Options exercisable at end of year, Shares | shares	3,435
Outstanding at beginning of year, Weighted - Average Exercise Price | $ / shares	$ 50.78
Granted, Weighted - Average Exercise Price | $ / shares	42.46
Canceled, Weighted - Average Exercise Price | $ / shares	51.58
Outstanding at end of period, Weighted - Average Exercise Price | $ / shares	49.68
Options exercisable at end of year, Weighted - Average Exercise Price | $ / shares	$ 50.36
Outstanding, Weighted - Average Remaining Contractual Life	6 years
Stock options exercisable, Weighted - Average Remaining Contractual Life	5 years 3 months 18 days
Outstanding at end of year, Aggregate Intrinsic Value | $	$ 3,846
Stock options exercisable, Aggregate Intrinsic Value | $	$ 2,189

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Stock-Based Compensation - Summary of Nucor's RSU Activity (Detail) - Restricted Stock Units [Member] shares in Thousands	9 Months Ended
	Oct. 03, 2020 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested at beginning of year, Shares | shares	1,776
Granted, Shares | shares	1,246
Vested, Shares | shares	(1,140)
Canceled, Shares | shares	(22)
Unvested at end of year, Shares | shares	1,860
Unvested at beginning of year, Grant Date Fair Value | $ / shares	$ 52.60
Granted, Grant Date Fair Value | $ / shares	42.46
Vested, Grant Date Fair Value | $ / shares	50.14
Canceled, Grant Date Fair Value | $ / shares	50.17
Unvested at end of year, Grant Date Fair Value | $ / shares	$ 47.34

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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
	Oct. 03, 2020 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested at beginning of year, Shares | shares	147
Granted, Shares | shares	348
Vested, Shares | shares	(359)
Unvested at end of year, Shares | shares	136
Unvested at beginning of year, Grant Date Fair Value | $ / shares	$ 60.81
Granted, Grant Date Fair Value | $ / shares	36.15
Vested, Grant Date Fair Value | $ / shares	40.98
Unvested at end of year, Grant Date Fair Value | $ / shares	$ 49.98

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Employee Benefit Plan - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Employee Benefit Plan [Abstract]
Profit Sharing and Retirement Savings Plan, plan expense	$ 27.5	$ 40.0	$ 59.5	$ 163.7

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Interest Expense (Income) - Schedule of Components of Net Interest Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Interest Revenue Or Expense Net [Abstract]
Interest expense	$ 42,281	$ 40,721	$ 128,726	$ 119,736
Interest income	(2,142)	(9,435)	(11,870)	(26,977)
Interest expense, net	$ 40,139	$ 31,286	$ 116,856	$ 92,759

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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Effective income tax rate	23.30%	22.80%
Non-current deferred tax liabilities included in deferred credits and other liabilities	$ 575.2		$ 431.0

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Stockholders' Equity - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019	Sep. 06, 2018
Dividends declared per share	$ 0.4025	$ 0.40	$ 1.2075	$ 1.20
Common Stock [Member]
Share repurchase program, available repurchase amount	$ 1,160,000,000		$ 1,160,000,000
Common Stock [Member] | Maximum [Member]
Stock Repurchase Program, Authorized Amount					$ 2,000,000,000.00
Nucor-Yamato Steel Company [Member]
Noncontrolling interest, ownership percentage by parent	51.00%	51.00%	51.00%	51.00%

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Stockholders' Equity - Schedule of Change in Stockholder's Equity (Detail) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
BALANCES, beginning of period	$ 10,623,485	$ 10,698,008	$ 10,791,176	$ 10,201,968
Net earnings	222,630	293,587	410,162	1,236,657
Other comprehensive income (loss)	25,367	(16,006)	(12,503)	(11,519)
Stock options exercised				5,892
Stock option expense	263	275	2,402	4,387
Issuance of stock under award plans, net of forfeitures	11,189	11,339	38,996	59,608
Amortization of unearned compensation	400	500	1,300	1,500
Treasury stock value acquired			(39,499)	(197,511)
Cash dividends declared	(123,039)	(122,809)	(368,774)	(368,707)
Distributions to noncontrolling interests	(43,228)	(3,861)	(106,193)	(71,241)
Other				(1)
BALANCES, end of period	10,717,067	10,861,033	10,717,067	10,861,033
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	$ 2,106,907	$ 2,098,809	$ 2,107,646	$ 2,073,715
Stock options exercised				808
Stock option expense	263	275	2,402	4,387
Issuance of stock under award plans, net of forfeitures	10,012	9,365	6,234	28,540
Amortization of unearned compensation	400	500	1,300	1,500
Other		(1)		(2)
BALANCES, end of period	2,117,582	2,108,948	2,117,582	2,108,948
Retained Earnings [Member]
BALANCES, beginning of period	10,998,533	10,977,950	11,115,056	10,337,445
Net earnings	193,415	275,031	322,627	1,163,320
Cash dividends declared	(123,039)	(122,809)	(368,774)	(368,707)
Other	(1)		(1)	(1,886)
BALANCES, end of period	11,068,908	11,130,172	11,068,908	11,130,172
Accumulated Other Comprehensive Income (Loss) [Member]
BALANCES, beginning of period	(340,836)	(297,760)	(302,966)	(304,133)
Other comprehensive income (loss)	25,367	(16,006)	(12,503)	(11,519)
Other				1,886
BALANCES, end of period	(315,469)	(313,766)	(315,469)	(313,766)
Treasury Stock (at cost) [Member]
BALANCES, beginning of period	$ (2,721,845)	$ (2,630,343)	$ (2,713,931)	$ (2,467,010)
BALANCES, shares at beginning of period	78,259	76,997	78,342	74,562
Stock options exercised				$ 5,084
Stock options exercised (in shares)				(153)
Issuance of stock under award plans, net of forfeitures	$ 1,177	$ 1,974	$ 32,762	$ 31,068
Issuance of stock under award plans, net of forfeitures, shares	(34)	(58)	(942)	(920)
Treasury stock value acquired			$ (39,499)	$ (197,511)
Treasury stock acquired (in shares)			825	3,450
Other		$ 1		$ 1
BALANCES, end of period	$ (2,720,668)	$ (2,628,368)	$ (2,720,668)	$ (2,628,368)
BALANCES, shares at end of period	78,225	76,939	78,225	76,939
Total Nucor Stockholders' Equity [Member]
BALANCES, beginning of period	$ 10,194,820	$ 10,300,717	$ 10,357,866	$ 9,792,078
Net earnings	193,415	275,031	322,627	1,163,320
Other comprehensive income (loss)	25,367	(16,006)	(12,503)	(11,519)
Stock options exercised				5,892
Stock option expense	263	275	2,402	4,387
Issuance of stock under award plans, net of forfeitures	11,189	11,339	38,996	59,608
Amortization of unearned compensation	400	500	1,300	1,500
Treasury stock value acquired			(39,499)	(197,511)
Cash dividends declared	(123,039)	(122,809)	(368,774)	(368,707)
Other	(1)		(1)	(1)
BALANCES, end of period	10,302,414	10,449,047	10,302,414	10,449,047
Noncontrolling Interests [Member]
BALANCES, beginning of period	428,665	397,291	433,310	409,890
Net earnings	29,215	18,556	87,535	73,337
Distributions to noncontrolling interests	(43,228)	(3,861)	(106,193)	(71,241)
Other	1		1
BALANCES, end of period	$ 414,653	$ 411,986	$ 414,653	$ 411,986

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Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Oct. 03, 2020		Sep. 28, 2019		Oct. 03, 2020		Sep. 28, 2019
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Beginning Balance, Gains and (Losses) on Hedging Derivatives	$ (10,900)		$ (11,100)		$ (14,000)		$ (6,500)
Other comprehensive income (loss) before reclassifications, Gains and (Losses) on Hedging Derivatives	6,387		(3,315)		4,888		(7,801)
Amounts reclassified from accumulated other comprehensive (loss) income into earnings, Gains and (Losses) on Hedging Derivatives	2,113	[1]	1,615	[2]	6,712	[1]	1,501	[2]
Net current-period other comprehensive income (loss), Gains and (Losses) on Hedging Derivatives	8,500		(1,700)		11,600		(6,300)
Ending Balance, Gains and (Losses) on Hedging Derivatives	(2,400)		(12,800)		(2,400)		(12,800)
Beginning Balance, Foreign Currency Gains (Loss)	(337,743)		(295,559)		(296,773)		(304,646)
Other comprehensive income (loss) before reclassifications, Foreign Currency Gains (Loss)	16,867		(14,306)		(24,103)		(5,219)
Net current-period other comprehensive income (loss), Foreign Currency Gains (Loss)	16,867		(14,306)		(24,103)		(5,219)
Ending Balance, Foreign Currency Gains (Loss)	(320,876)		(309,865)		(320,876)		(309,865)
Beginning Balance, Adjustment to Early Retiree Medical Plan	7,807		8,899		7,807		7,013
Accumulated other comprehensive income loss defined benefit pension and other postretirement plans other net of tax							1,886
Ending Balance, Adjustment to Early Retiree Medical Plan	7,807		8,899		7,807		8,899
Beginning Balance	(340,836)		(297,760)		(302,966)		(304,133)
Other comprehensive income (loss) before reclassifications	23,254		(17,621)		(19,215)		(13,020)
Amounts reclassified from accumulated other comprehensive income (loss) into earnings	2,113	[1]	1,615	[2]	6,712	[1]	1,501	[2]
Net current-period other comprehensive income (loss)	25,367		(16,006)		(12,503)		(11,519)
Accumulated other comprehensive income loss other net of tax							1,886
Ending Balance	$ (315,469)		$ (313,766)		$ (315,469)		$ (313,766)

[1] Includes $2,113 and $6,712 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 2020, respectively. The tax impacts of those reclassifications were $700 and $2,300 in the third quarter and first nine months of 2020, respectively.

[2] Includes $1,615 and $1,501 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 2019, respectively. The tax impacts of those reclassifications were $500 in both the third quarter and first nine months of 2019.

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Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Income (Loss) (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Oct. 03, 2020		Sep. 28, 2019		Oct. 03, 2020		Sep. 28, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified from accumulated other comprehensive (loss) income into earnings, Gains and (Losses) on Hedging Derivatives	$ 2,113	[1]	$ 1,615	[2]	$ 6,712	[1]	$ 1,501	[2]
AOCI reclassification impact on tax	700		500		2,300		500
Cost of Products Sold [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified from accumulated other comprehensive (loss) income into earnings, Gains and (Losses) on Hedging Derivatives	2,113		1,615		6,712		1,501
AOCI reclassification impact on tax	$ 700		$ 500		$ 2,300		$ 500

[1] Includes $2,113 and $6,712 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 2020, respectively. The tax impacts of those reclassifications were $700 and $2,300 in the third quarter and first nine months of 2020, respectively.

[2] Includes $1,615 and $1,501 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 2019, respectively. The tax impacts of those reclassifications were $500 in both the third quarter and first nine months of 2019.

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Accumulated Other Comprehensive Income (Loss) - Additional Information (Detail) - USD ($) $ in Thousands	Oct. 03, 2020	Jul. 04, 2020	Dec. 31, 2019	Sep. 28, 2019	Jun. 29, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Losses related to foreign currency/equity method investment/operations	$ (320,876)	$ (337,743)	$ (296,773)	$ (309,865)	$ (295,559)	$ (304,646)
Canadian Operations [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Losses related to foreign currency/equity method investment/operations	(129,400)
Duferdofin Nucor S.r.l. [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Losses related to foreign currency/equity method investment/operations	$ (191,500)

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Segments - Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net sales	$ 4,927,960	$ 5,464,502	$ 14,879,603	$ 17,457,112
Earnings (loss) before income taxes and noncontrolling interests	290,418	380,339	617,772	1,604,577
Total assets	19,519,277		19,519,277		$ 18,344,666
Operating Segments [Member] | Steel Mills [Member]
Segment Reporting Information [Line Items]
Net sales	2,842,625	3,244,473	8,875,856	10,897,322
Earnings (loss) before income taxes and noncontrolling interests	205,152	309,939	512,082	1,578,257
Total assets	9,251,790		9,251,790		9,283,216
Operating Segments [Member] | Steel Products [Member]
Segment Reporting Information [Line Items]
Net sales	1,738,004	1,820,359	4,988,026	5,225,064
Earnings (loss) before income taxes and noncontrolling interests	186,976	170,214	502,409	363,731
Total assets	4,399,501		4,399,501		4,610,628
Operating Segments [Member] | Raw Materials [Member]
Segment Reporting Information [Line Items]
Net sales	347,331	399,670	1,015,721	1,334,726
Earnings (loss) before income taxes and noncontrolling interests	6,232	(10,599)	(3,068)	64,333
Total assets	3,172,464		3,172,464		3,316,479
Intercompany Eliminations [Member] | Steel Mills [Member]
Segment Reporting Information [Line Items]
Net sales	731,942	825,237	2,264,278	2,542,008
Intercompany Eliminations [Member] | Steel Products [Member]
Segment Reporting Information [Line Items]
Net sales	51,029	57,517	197,603	174,718
Intercompany Eliminations [Member] | Raw Materials [Member]
Segment Reporting Information [Line Items]
Net sales	1,863,796	2,063,167	5,772,583	6,917,523
Corporate and Eliminations Items [Member]
Segment Reporting Information [Line Items]
Net sales	(2,646,767)	(2,945,921)	(8,234,464)	(9,634,249)
Earnings (loss) before income taxes and noncontrolling interests	(107,942)	$ (89,215)	(393,651)	$ (401,744)
Total assets	$ 2,695,522		$ 2,695,522		$ 1,134,343

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Revenue - Schedule of Net Sales Disaggregates by Major Source (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Revenue from Contract with Customers [Line Items]
Revenues	$ 4,927,960	$ 5,464,502	$ 14,879,603	$ 17,457,112
Sheet [Member]
Revenue from Contract with Customers [Line Items]
Revenues	1,256,537	1,513,884	3,899,970	5,071,027
Bar [Member]
Revenue from Contract with Customers [Line Items]
Revenues	957,216	979,082	2,830,936	3,173,289
Structural [Member]
Revenue from Contract with Customers [Line Items]
Revenues	362,192	378,670	1,159,949	1,214,355
Plate [Member]
Revenue from Contract with Customers [Line Items]
Revenues	266,680	372,837	985,001	1,438,651
Tubular Products [Member]
Revenue from Contract with Customers [Line Items]
Revenues	274,915	296,519	830,283	919,711
Rebar Fabrication [Member]
Revenue from Contract with Customers [Line Items]
Revenues	463,286	469,180	1,300,518	1,249,912
Other Steel Products [Member]
Revenue from Contract with Customers [Line Items]
Revenues	999,803	1,054,660	2,857,225	3,055,441
Raw Materials [Member]
Revenue from Contract with Customers [Line Items]
Revenues	347,331	399,670	1,015,721	1,334,726
Steel Mills [Member]
Revenue from Contract with Customers [Line Items]
Revenues	2,842,625	3,244,473	8,875,856	10,897,322
Steel Mills [Member] | Sheet [Member]
Revenue from Contract with Customers [Line Items]
Revenues	1,256,537	1,513,884	3,899,970	5,071,027
Steel Mills [Member] | Bar [Member]
Revenue from Contract with Customers [Line Items]
Revenues	957,216	979,082	2,830,936	3,173,289
Steel Mills [Member] | Structural [Member]
Revenue from Contract with Customers [Line Items]
Revenues	362,192	378,670	1,159,949	1,214,355
Steel Mills [Member] | Plate [Member]
Revenue from Contract with Customers [Line Items]
Revenues	266,680	372,837	985,001	1,438,651
Steel Products [Member]
Revenue from Contract with Customers [Line Items]
Revenues	1,738,004	1,820,359	4,988,026	5,225,064
Steel Products [Member] | Tubular Products [Member]
Revenue from Contract with Customers [Line Items]
Revenues	274,915	296,519	830,283	919,711
Steel Products [Member] | Rebar Fabrication [Member]
Revenue from Contract with Customers [Line Items]
Revenues	463,286	469,180	1,300,518	1,249,912
Steel Products [Member] | Other Steel Products [Member]
Revenue from Contract with Customers [Line Items]
Revenues	999,803	1,054,660	2,857,225	3,055,441
Raw Materials [Member]
Revenue from Contract with Customers [Line Items]
Revenues	347,331	399,670	1,015,721	1,334,726
Raw Materials [Member] | Raw Materials [Member]
Revenue from Contract with Customers [Line Items]
Revenues	$ 347,331	$ 399,670	$ 1,015,721	$ 1,334,726

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Revenue - Additional Information (Detail) - USD ($) $ in Millions	Oct. 03, 2020	Dec. 31, 2019
Revenue From Contract With Customer [Abstract]
Contract liabilities	$ 114.3	$ 108.6

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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
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Earnings Per Share [Abstract]
Basic net earnings	$ 193,415	$ 275,031	$ 322,627	$ 1,163,320
Earnings allocated to participating securities, Basic	(1,201)	(1,655)	(2,182)	(6,295)
Net earnings available to common stockholders, Basic	$ 192,214	$ 273,376	$ 320,445	$ 1,157,025
Basic average shares outstanding	303,394	304,637	303,072	305,553
Basic net earnings per share	$ 0.63	$ 0.90	$ 1.06	$ 3.79
Diluted net earnings	$ 193,415	$ 275,031	$ 322,627	$ 1,163,320
Earnings allocated to participating securities, Diluted	(1,202)	(1,656)	(2,182)	(6,295)
Net earnings available to common stockholders, Diluted	$ 192,213	$ 273,375	$ 320,445	$ 1,157,025
Dilutive effect of stock options and other	47	343	27	476
Diluted average shares outstanding	303,441	304,980	303,099	306,029
Diluted net earnings per share	$ 0.63	$ 0.90	$ 1.06	$ 3.78

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Earnings Per Share - Anti-dilutive Stock Options (Detail) - $ / shares shares in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Earnings Per Share [Abstract]
Weighted-average shares	3,463	963	3,638	963
Weighted-average exercise price	$ 51.38	$ 60.92	$ 51.15	$ 60.92

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Restricted Cash and Cash Equivalents - Additional Information (Details) - USD ($) $ in Thousands		1 Months Ended
	Oct. 03, 2020	Jul. 31, 2020
Restricted Cash And Cash Equivalents Items [Line Items]
Qualified expenditures for construction of facility	$ 31,000
Restricted cash and cash equivalents	$ 131,623
Variable Rate Green Bonds [Member]
Restricted Cash And Cash Equivalents Items [Line Items]
Debt instrument, issuance date	Jul. 27, 2020
Issuance of bonds	$ 162,600	$ 162,600
Debt instrument, term	40 years	40 years

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Debt - Additional Information (Details) - USD ($) $ in Millions		1 Months Ended
	Oct. 03, 2020	Jul. 31, 2020	May 31, 2020
Debt Instrument [Line Items]
Net proceeds of debt issuances			$ 989.4
Debt issuance costs			8.4
Variable Rate Green Bonds [Member]
Debt Instrument [Line Items]
Issuance of bonds	$ 162.6	$ 162.6
Debt instrument, term	40 years	40 years
Notes, 2.000%, due 2025 [Member]
Debt Instrument [Line Items]
Debt instrument face amount			$ 500.0
Debt instrument interest rate			2.00%
Debt instrument - maturity year			2025
Notes, 2.700%, due 2030 [Member]
Debt Instrument [Line Items]
Debt instrument face amount			$ 500.0
Debt instrument interest rate			2.70%
Debt instrument - maturity year			2030

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Subsequent Event - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Dec. 31, 2020	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Subsequent Event [Line Items]
Provision for income taxes, approximate net benefit		$ (67,788)	$ (86,752)	$ (207,610)	$ (367,920)
Scenario Forecast [Member]
Subsequent Event [Line Items]
Provision for income taxes, approximate net benefit	$ 40,000