Nucor (NUE) 10-Q 8 Aug 18 2018 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information	6 Months Ended
	Jun. 30, 2018shares
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q2
Trading Symbol	NUE
Entity Registrant Name	NUCOR CORP
Entity Central Index Key	73,309
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding	316,343,488

Condensed Consolidated Statemen

Condensed Consolidated Statements of Earnings - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Income Statement [Abstract]
Net sales	$ 6,460,774	$ 5,174,769	$ 12,029,193	$ 9,989,948
Costs, expenses and other:
Cost of products sold	5,294,184	4,465,144	10,136,197	8,520,073
Marketing, administrative and other expenses	234,381	170,211	417,341	346,637
Equity in earnings of unconsolidated affiliates	(10,943)	(13,302)	(20,523)	(22,058)
Interest expense, net	29,451	44,580	66,565	88,185
Costs, expenses and other, total	5,547,073	4,666,633	10,599,580	8,932,837
Earnings before income taxes and noncontrolling interests	913,701	508,136	1,429,613	1,057,111
Provision for income taxes	200,086	166,412	335,886	337,739
Net earnings	713,615	341,724	1,093,727	719,372
Earnings attributable to noncontrolling interests	30,462	18,676	56,395	39,425
Net earnings attributable to Nucor stockholders	$ 683,153	$ 323,048	$ 1,037,332	$ 679,947
Net earnings per share:
Basic	$ 2.14	$ 1	$ 3.24	$ 2.12
Diluted	$ 2.13	$ 1	$ 3.23	$ 2.11
Average shares outstanding:
Basic	318,467	320,439	318,941	320,332
Diluted	319,391	321,226	319,930	321,186
Dividends declared per share	$ 0.3800	$ 0.3775	$ 0.7600	$ 0.7550

Condensed Consolidated Stateme3

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Statement Of Comprehensive Income [Abstract]
Net earnings	$ 713,615	$ 341,724	$ 1,093,727	$ 719,372
Other comprehensive income:
Net unrealized loss on hedging derivatives, net of income taxes of ($1,100) and $0 for the second quarter of 2018 and 2017, respectively, and ($600) and ($1,000) for the first six months of 2018 and 2017, respectively	(3,647)	(71)	(4,399)	(1,706)
Reclassification adjustment for loss on settlement of hedging derivatives included in net income, net of income taxes of $100 and $0 for the second quarter of 2018 and 2017, respectively, and $100 and $300 for the first six months of 2018 and 2017, respectively	447	171	399	656
Foreign currency translation gain (loss), net of income taxes of $0 for the second quarter and first six months of 2018 and 2017	(43,466)	23,957	(37,351)	25,958
Net current-period other comprehensive income (loss)	(46,666)	24,057	(41,351)	24,908
Comprehensive income	666,949	365,781	1,052,376	744,280
Comprehensive income attributable to noncontrolling interests	(30,462)	(18,676)	(56,395)	(39,425)
Comprehensive income attributable to Nucor stockholders	$ 636,487	$ 347,105	$ 995,981	$ 704,855

Condensed Consolidated Stateme4

Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Statement Of Comprehensive Income [Abstract]
Net unrealized (income) loss on hedging derivatives, tax	$ (1,100)	$ 0	$ (600)	$ (1,000)
Reclassification adjustment for loss on settlement of hedging derivatives included in net income, tax effect	100	0	100	300
Foreign currency translation gain (loss) tax	$ 0	$ 0	$ 0	$ 0

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 1,486,453	$ 949,104
Short-term investments		50,000
Accounts receivable, net	2,637,744	2,028,545
Inventories, net	4,133,472	3,461,686
Other current assets	143,566	335,085
Total current assets	8,401,235	6,824,420
Property, plant and equipment, net	5,122,381	5,093,147
Goodwill	2,185,809	2,196,058
Other intangible assets, net	867,905	914,646
Other assets	874,362	812,987
Total assets	17,451,692	15,841,258
Current liabilities:
Short-term debt	59,168	52,833
Long-term debt due within one year		500,000
Accounts payable	1,558,020	1,181,346
Salaries, wages and related accruals	507,608	516,660
Accrued expenses and other current liabilities	625,533	573,925
Total current liabilities	2,750,329	2,824,764
Long-term debt due after one year	4,232,244	3,242,242
Deferred credits and other liabilities	733,695	689,464
Total liabilities	7,716,268	6,756,470
Nucor stockholders' equity:
Common stock	152,061	151,960
Additional paid-in capital	2,051,382	2,021,339
Retained earnings	9,257,823	8,463,709
Accumulated other comprehensive loss, net of income taxes	(296,032)	(254,681)
Treasury stock	(1,791,827)	(1,643,291)
Total Nucor stockholders' equity	9,373,407	8,739,036
Noncontrolling interests	362,017	345,752
Total equity	9,735,424	9,084,788
Total liabilities and equity	$ 17,451,692	$ 15,841,258

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017
Operating activities:
Net earnings	$ 1,093,727	$ 719,372
Adjustments:
Depreciation	316,402	318,278
Amortization	44,573	45,443
Stock-based compensation	51,905	41,159
Deferred income taxes	48,181	(4,173)
Distributions from affiliates	27,453	46,877
Equity in earnings of unconsolidated affiliates	(20,523)	(22,058)
Changes in assets and liabilities (exclusive of acquisitions and dispositions):
Accounts receivable	(602,414)	(396,452)
Inventories	(676,266)	(781,581)
Accounts payable	367,950	371,158
Federal income taxes	208,996	(14,114)
Salaries, wages and related accruals	1,631	(1,897)
Other operating activities	8,977	28,849
Cash provided by operating activities	870,592	350,861
Investing activities:
Capital expenditures	(361,486)	(189,235)
Investment in and advances to affiliates	(73,427)	(19,000)
Disposition of plant and equipment	17,297	12,509
Acquisitions (net of cash acquired)		(478,410)
Purchases of investments		(50,000)
Proceeds from the sale of investments	50,000	150,000
Other investing activities	1,378	(990)
Cash used in investing activities	(366,238)	(575,126)
Financing activities:
Net change in short-term debt	6,334	21,235
Proceeds from long-term debt, net of discount	995,710
Repayment of long-term debt	(500,000)
Bond issuance related costs	(7,625)
Issuance of common stock	12,280	3,535
Payment of tax withholdings on certain stock-based compensation	(19,508)	(13,185)
Distributions to noncontrolling interests	(40,130)	(79,420)
Cash dividends	(243,649)	(242,704)
Acquisition of treasury stock	(170,315)
Other financing activities	(3,879)	(1,101)
Cash provided by (used in) financing activities	29,218	(311,640)
Effect of exchange rate changes on cash	3,777	1,297
Increase (decrease) in cash and cash equivalents	537,349	(534,608)
Cash and cash equivalents - beginning of year	949,104	2,045,961
Cash and cash equivalents - end of six months	1,486,453	1,511,353
Non-cash investing activity:
Change in accrued plant and equipment purchases recorded under capital lease arrangements	$ 1,776	$ (12,927)

Basis of Interim Presentation

Basis of Interim Presentation	6 Months Ended
	Jun. 30, 2018
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, 2017 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 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 Reclassifications – In the first quarter of 2018, the Company began reporting its tubular products and piling businesses as part of the steel products segment. These businesses were previously included in the steel mills segment and were reclassified to the steel products segment as part of a realignment of Nucor’s reportable segments to reflect the way in which they are now viewed by management and how segment performance assessments will be made by the chief operating decision maker beginning in such period. As a result, certain prior period amounts have been reclassified to conform to the current year presentation. These reclassifications did not have an impact on the condensed consolidated financial statements of the Company for the prior periods presented. See Note 15 for more information related to this segment realignment. Recently Adopted Accounting Pronouncements – In the first quarter of 2018, we adopted new accounting guidance related to revenue recognition for all contracts using the modified retrospective method. The modified retrospective method requires that the cumulative effect of initially applying this new guidance be recorded as an adjustment to the opening balance of retained earnings in the condensed consolidated balance sheet. The adoption of this new accounting guidance did not have an impact on any prior period earnings attributable to Nucor stockholders, and no adjustment was recorded to the opening retained earnings balance as of January 1, 2018. Retrospective adjustment of comparative prior period information is not required when using the modified retrospective adoption method, and no comparative prior periods have been adjusted for the new guidance. The adoption of the new revenue accounting guidance did not significantly change the way we recognize revenue. To illustrate this, if we had continued using the previous accounting guidance in effect before the adoption of the new revenue accounting guidance, our consolidated net sales for the second quarter and first six months of 2018 would have increased approximately $22.7 million, or 0.4%, and $32.9 million, or 0.3%, respectively, and cost of products sold would have increased by the same amounts. There would have been no impact on any other financial statement line items in the condensed consolidated financial statements for the second quarter or first six months of 2018. See Note 16 for disclosures required by the new revenue accounting guidance. In the first quarter of 2018, we adopted new accounting guidance regarding the recognition and measurement of financial assets and financial liabilities. Changes to the current accounting guidance primarily affect the accounting for equity investments, financial liabilities under the fair value option, and the presentation and disclosure requirements for financial instruments. In addition, the Financial Accounting Standards Board clarified guidance related to the valuation allowance assessment when recognizing deferred tax assets resulting from unrealized losses on available-for-sale In the first quarter of 2018, we adopted new accounting guidance regarding the presentation and classification of certain cash receipts and cash payments in the statement of cash flows. The new guidance addresses specific cash flow presentation issues in order to reduce diversity in existing practice. The adoption of this new guidance did not have a material impact on the Company’s consolidated financial statements. In the first quarter of 2018, we adopted new accounting guidance regarding intra-entity transfers of assets other than inventory. The new guidance requires that an entity should recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. The adoption of this new guidance did not have a material impact on the Company’s consolidated financial statements. Recently Issued Accounting Pronouncements - In February 2016, new accounting guidance was issued regarding the accounting for leases. The new guidance requires all lessees to recognize on the balance sheet right to use assets and lease liabilities for the rights and obligations created by lease arrangements with terms greater than 12 months. The new guidance is effective for the Company for annual and interim reporting periods beginning after December 15, 2018. While the adoption of this new guidance is expected to increase assets and liabilities due to the recognition of lease rights and obligations on the balance sheet effective January 1, 2019, the Company does not expect the adoption of this new guidance to have a significant impact on its statement of earnings, statement of comprehensive income or statement of cash flows. In February 2018, new accounting guidance was issued regarding the tax effects of the Tax Cuts and Jobs Act (the “Tax Reform Act”). The new guidance allows for a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Reform Act to improve the usefulness of information reported to financial statement users. The new guidance is effective for the Company for annual and interim reporting periods beginning after December 15, 2018. The Company does not expect the adoption of this new guidance to have a material impact on its consolidated financial statements.

Inventories

Inventories	6 Months Ended
	Jun. 30, 2018
Inventory Disclosure [Abstract]
Inventories	2. INVENTORIES: Inventories consisted of approximately 42% raw materials and supplies and 58% finished and semi-finished products at both June 30, 2018 and December 31, 2017. Nucor’s manufacturing process consists of a continuous, vertically integrated process from which products are sold to customers at various stages throughout the process. Since most steel products can be classified as either finished or semi-finished products, these two categories of inventory are combined.

Property, Plant and Equipment

Property, Plant and Equipment	6 Months Ended
	Jun. 30, 2018
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 $8.89 billion at June 30, 2018 ($8.70 billion at December 31, 2017). Given the natural gas pricing environment, Nucor performed an impairment assessment of its proved producing natural gas well assets in December 2017. One of the main assumptions that most significantly affects the undiscounted cash flows determination is management’s estimate of future natural gas prices. The pricing used in this impairment assessment was developed by management based on projected natural gas market supply and demand dynamics. Management also makes key estimates on the expected reserve levels and on the expected drilling production costs. This analysis was performed on each of Nucor’s three groups of wells, with each group defined by common geographic location. Each of Nucor’s three groups of wells passed the impairment test. The combined carrying value of the three groups of wells was $241.0 million at June 30, 2018 ($252.0 million at December 31, 2017). Changes in the natural gas industry or a continuation of the low price environment beyond what had already been assumed in the analysis could cause management to revise the natural gas price assumptions, the estimated reserves or the estimated drilling production costs. Unfavorable revisions to these assumptions or estimates could possibly result in an impairment of some or all of the groups of proved well assets.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	6 Months Ended
	Jun. 30, 2018
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 six months ended June 30, 2018, by segment, was as follows (in thousands): Steel Mills Steel Products Raw Materials Total Balance at December 31, 2017 $ 745,484 $ 720,997 $ 729,577 $ 2,196,058 Translation — (10,249 ) — (10,249 ) Reclassifications (153,498 ) 153,498 — — Balance at June 30, 2018 $ 591,986 $ 864,246 $ 729,577 $ 2,185,809 Previously, Nucor’s tubular products and piling businesses were reported in the steel mills segment. Beginning in the first quarter of 2018, these businesses were reclassified to the steel products segment to better reflect the way in which they are viewed by management. Nucor completed its most recent annual goodwill impairment testing during the fourth quarter of 2017 and concluded that as of such time there was no impairment of goodwill for any of its reporting units. There have been no triggering events requiring an interim assessment for impairment since the most recent annual goodwill impairment testing date. 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 June 30, 2018 and December 31, 2017 (in thousands): June 30, 2018 December 31, 2017 Gross Accumulated Gross Accumulated Customer relationships $ 1,418,437 $ 677,547 $ 1,420,224 $ 641,089 Trademarks and trade names 176,089 82,426 176,471 77,208 Other 62,806 29,454 62,805 26,557 $ 1,657,332 $ 789,427 $ 1,659,500 $ 744,854 Intangible asset amortization expense in the second quarter of 2018 and 2017 was $22.1 million and $23.0 million, respectively, and was $44.6 million and $45.4 million in the first six months of 2018 and 2017, respectively. Annual amortization expense is estimated to be $88.6 million in 2018; $86.7 million in 2019; $84.4 million in 2020; $83.1 million in 2021; and $80.8 million in 2022.

Equity Investments

Equity Investments	6 Months Ended
	Jun. 30, 2018
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 $808.9 million at June 30, 2018 ($750.1 million at December 31, 2017) 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 the investment in NuMit (on a one-month 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 the investment (on a one-month Nucor’s investment in Duferdofin Nucor at June 30, 2018 was $275.2 million ($285.9 million at December 31, 2017). Nucor’s 50% share of the total net assets of Duferdofin Nucor was $114.5 million at June 30, 2018, resulting in a basis difference of $160.7 million due to the step-up step-up As of June 30, 2018, Nucor had outstanding notes receivable of €35.0 million ($40.8 million) from Duferdofin Nucor (€35.0 million, or $41.9 million, as of December 31, 2017). The notes receivable bear interest at 0.83% and reset annually on September 30 to the 12-month Euro Interbank Offered Rate plus 1% per year. The maturity date of the principal amounts was extended to January 31, 2022 during the first quarter of 2018. As of June 30, 2018 and December 31, 2017, the notes receivable were classified in other assets in the condensed consolidated balance sheets. 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 ($186.4 million) at June 30, 2018. As of June 30, 2018, there was €140.0 million ($163.1 million) outstanding under that facility (€122.5 million, or $146.7 million, as of December 31, 2017). 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. NUCOR-JFE Nucor owns a 50% economic and voting interest in Nucor-JFE (“Nucor-JFE”), 50-50 Nucor-JFE Nucor-JFE one-month Nucor-JFE ALL EQUITY INVESTMENTS Nucor reviews its equity investments for impairment if and when circumstances indicate that a decline in value below their carrying amounts may have occurred. Nucor last assessed its equity investment in Duferdofin Nucor for impairment during the fourth quarter of 2017 due to the protracted challenging steel market conditions in Europe. After completing its assessment, the Company determined that the estimated fair value exceeded its carrying amount by a sufficient amount and that there was no need to record an impairment charge. The assumptions that most significantly affect the fair value determination include projected revenues and the discount rate. It is reasonably possible that material deviation of future performance from the estimates used in our most recent valuation could result in impairment of our investment in Duferdofin Nucor. We will continue to monitor for potential triggering events that could affect the carrying value of our investment in Duferdofin Nucor as a result of future market conditions and any changes in our business strategy.

Current Liabilities

Current Liabilities	6 Months Ended
	Jun. 30, 2018
Payables and Accruals [Abstract]
Current Liabilities	6. CURRENT LIABILITIES: Book overdrafts, included in accounts payable in the condensed consolidated balance sheets, were $163.2 million at June 30, 2018 ($139.2 million at December 31, 2017). Dividends payable, included in accrued expenses and other current liabilities in the condensed consolidated balance sheets, were $121.3 million at June 30, 2018 ($121.8 million at December 31, 2017).

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2018
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 are measured at fair value as of June 30, 2018 and December 31, 2017 (in thousands). Nucor does not have any non-financial non-financial Fair Value Measurements at Reporting Date Description Carrying Quoted Prices (Level 1) Significant Significant (Level 3) As of June 30, 2018 Assets: Cash equivalents $ 1,178,986 $ 1,178,986 $ — $ — Derivative contracts 6,455 — 6,455 — Total assets $ 1,185,441 $ 1,178,986 $ 6,455 $ — Liabilities: Derivative contracts $ (9,000 ) $ — $ (9,000 ) $ — As of December 31, 2017 Assets: Cash equivalents $ 594,946 $ 594,946 $ — $ — Short-term investments 50,000 50,000 — — Derivative contracts 479 — 479 — Total assets $ 645,425 $ 644,946 $ 479 $ — Liabilities: Derivative contracts $ (8,531 ) $ — $ (8,531 ) $ — Fair value measurements for Nucor’s cash equivalents and short-term investments are classified under Level 1 because such measurements are based on quoted market prices in active markets for identical assets. Fair value measurements for Nucor’s derivatives, which are typically commodity or foreign exchange contracts, are classified under Level 2 because such measurements are based on published market prices for similar assets or are estimated based on observable inputs such as interest rates, yield curves, credit risks, spot and future commodity prices and spot and future exchange rates. The fair value of short-term and long-term debt, including current maturities, was approximately $4.53 billion at June 30, 2018 ($4.19 billion at December 31, 2017). The debt fair value estimates are classified under Level 2 because such estimates are based on readily available market prices of our debt at June 30, 2018 and December 31, 2017, or similar debt with the same maturities, ratings and interest rates.

Contingencies

Contingencies	6 Months Ended
	Jun. 30, 2018
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 $16.7 million of accrued environmental costs at June 30, 2018 ($17.1 million at December 31, 2017), $2.4 million was classified in accrued expenses and other current liabilities ($3.8 million at December 31, 2017) and $14.3 million was classified in deferred credits and other liabilities ($13.3 million at December 31, 2017). Inherent uncertainties exist in these estimates primarily due to unknown conditions, evolving remediation technology and changing governmental regulations and legal standards. We are from time to time a party to various lawsuits, claims and other legal proceedings that arise in the ordinary course of business. With respect to all such lawsuits, claims and proceedings, we record reserves when it is probable a liability has been incurred and the amount of loss can be reasonably estimated. We do not believe that any of these proceedings, individually or in the aggregate, would be expected to have a material adverse effect on our results of operations, financial position or cash flows. Nucor maintains liability insurance with self-insurance limits for certain risks.

Stock-Based Compensation

Stock-Based Compensation	6 Months Ended
	Jun. 30, 2018
Disclosure of Compensation Related Costs, Share-based 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 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 June 30, 2018, 2.0 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 A summary of activity under Nucor’s stock option plans for the first six months of 2018 is as follows (in thousands, except years and per share amounts): Shares Weighted - Weighted - Aggregate Number of shares under stock options: Outstanding at beginning of year 4,106 $ 47.96 Granted 265 $ 65.80 Exercised (288 ) $ 42.64 $ 7,253 Canceled — $ — Outstanding at June 30, 2018 4,083 $ 49.49 6.8 years $ 53,997 Stock options exercisable at June 30, 2018 2,368 $ 45.50 5.6 years $ 40,350 For the 2018 stock option grant, the grant date fair value of $15.07 per share was calculated using the Black-Scholes option-pricing model with the following assumptions: Exercise price $ 65.80 Expected dividend yield 2.31 % Expected stock price volatility 25.28 % Risk-free interest rate 2.85 % Expected life (years) 6.5 Stock options granted to employees who are eligible for retirement on the date of 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 $3.6 million and $7.2 million in the second quarter of 2018 and 2017, respectively, and $4.0 million and $7.5 million in the first six months of 2018 and 2017, respectively. As of June 30, 2018, unrecognized compensation expense related to stock options was $2.2 million, which is expected to be recognized over a weighted-average period of 2.1 years. Restricted Stock Units – Nucor annually grants restricted stock units (“RSUs”) to key employees, officers and non-employee non-employee non-employee RSUs granted to employees who are eligible for retirement on the date of 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 six months of 2018 is as follows (shares in thousands): Shares Grant Date RSUs: Unvested at beginning of year 1,071 $ 52.62 Granted 1,013 $ 65.80 Vested (762 ) $ 59.20 Canceled (10 ) $ 53.50 Unvested at June 30, 2018 1,312 $ 58.97 Compensation expense for RSUs was $32.6 million and $21.1 million in the second quarter of 2018 and 2017, respectively, and $38.3 million and $26.1 million in the first six months of 2018 and 2017, respectively. As of June 30, 2018, unrecognized compensation expense related to unvested RSUs was $62.1 million, which is expected to be recognized over a weighted-average period of 2.1 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 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 A summary of Nucor’s restricted stock activity under the AIP and the LTIP for the first six months of 2018 is as follows (shares in thousands): Shares Grant Date RSUs and Restricted stock awards: Unvested at beginning of year 91 $ 54.50 Granted 256 $ 67.68 Vested (212 ) $ 64.99 Canceled — — Unvested at June 30, 2018 135 $ 62.99 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 $5.3 million and $3.2 million in the second quarter of 2018 and 2017, respectively, and $9.7 million and $7.5 million in the first six months of 2018 and 2017, respectively. As of June 30, 2018, unrecognized compensation expense related to unvested restricted stock awards was $2.4 million, which is expected to be recognized over a weighted-average period of 2.0 years.

Employee Benefit Plans

Employee Benefit Plans	6 Months Ended
	Jun. 30, 2018
Retirement Benefits [Abstract]
Employee Benefit Plans	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 $88.4 million and $48.5 million in the second quarter of 2018 and 2017, respectively, and $140.1 million and $102.5 million in the first six months of 2018 and 2017, respectively. The related liability for these benefits is included in salaries, wages and related accruals in the condensed consolidated balance sheets.

Interest Expense (Income)

Interest Expense (Income)	6 Months Ended
	Jun. 30, 2018
Banking and Thrift, Interest [Abstract]
Interest Expense (Income)	11. INTEREST EXPENSE (INCOME): The components of net interest expense for the second quarter and first six months of 2018 and 2017 are as follows (in thousands): Three Months (13 Weeks) Ended Six Months (26 Weeks) Ended June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 Interest expense $ 35,341 $ 47,565 $ 75,519 $ 93,865 Interest income (5,890 ) (2,985 ) (8,954 ) (5,680 ) Interest expense, net $ 29,451 $ 44,580 $ 66,565 $ 88,185 Interest expense for the second quarter of 2018 decreased compared to the second quarter of 2017 due to a benefit received from entering into and settling a treasury lock instrument in anticipation of the Company’s debt issuance in the second quarter of 2018. The Company did not elect hedge accounting for this instrument. Interest expense for the first half of 2018 decreased compared to the first half of 2017 due to a decrease in average debt outstanding associated with the repayment of $600.0 million of 5.750% notes due 2017 in the fourth quarter of 2017 and the treasury lock instrument noted above. Interest income for the second quarter and first half of 2018 increased compared to the respective prior year periods due to higher average interest rates on investments.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	The effective tax rate for the second quarter of 2018 was 21.9% compared to 32.7% for the second quarter of 2017. The decrease in the effective tax rate for the second quarter of 2018 as compared to the second quarter of 2017 was primarily due to the permanent lowering of the U.S. corporate federal income tax rate from 35% to 21% effective for the years beginning after December 31, 2017 under the Tax Reform Act. This decrease was somewhat offset by increases in the effective tax rate due to the elimination of the domestic manufacturing deduction under the Tax Reform Act. Nucor has concluded U.S. federal income tax matters for years through 2013. The tax years 2014 through 2016 remain open to examination by the Internal Revenue Service. The Canada Revenue Agency has substantially concluded its examination of the 2012 and 2013 Canadian returns for Harris Steel Group Inc. and certain related affiliates. The tax years 2010 through 2017 remain open to examination by other major taxing jurisdictions to which Nucor is subject (primarily Canada and other state and local jurisdictions). Non-current Non-current

Stockholders' Equity

Stockholders' Equity	6 Months Ended
	Jun. 30, 2018
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 six months ended June 30, 2018 and July 1, 2017 (in thousands): Attributable to Attributable to Total Stockholders’ equity at December 31, 2017 $ 8,739,036 $ 345,752 $ 9,084,788 Total comprehensive income 995,981 56,395 1,052,376 Stock options 16,218 — 16,218 Issuance of stock under award plans, net of forfeitures 34,706 — 34,706 Amortization of unearned compensation 1,000 — 1,000 Treasury stock acquired (170,315 ) — (170,315 ) Dividends declared (243,219 ) — (243,219 ) Distributions to noncontrolling interests — (40,130 ) (40,130 ) Stockholders’ equity at June 30, 2018 $ 9,373,407 $ 362,017 $ 9,735,424 Attributable to Attributable to Total Stockholders’ equity at December 31, 2016 $ 7,879,865 $ 374,843 $ 8,254,708 Total comprehensive income 704,855 39,425 744,280 Stock options 11,068 — 11,068 Issuance of stock under award plans, net of forfeitures 23,593 — 23,593 Amortization of unearned compensation 700 — 700 Dividends declared (243,016 ) — (243,016 ) Distributions to noncontrolling interests — (79,420 ) (79,420 ) Stockholders’ equity at July 1, 2017 $ 8,377,065 $ 334,848 $ 8,711,913 In September 2015, the Company announced that the Board of Directors had approved a share repurchase program under which the Company is authorized to repurchase up to $900.0 million of the Company’s common stock. This $900.0 million share repurchase program has no stated expiration and replaced any previously authorized repurchase programs. As of June 30, 2018, the Company had approximately $567.7 million remaining available for share repurchases under the program. The Company expects any share repurchases to be made through purchases from time to time in the open market at prevailing market prices, through private transactions or block trades. The timing and amount of any repurchases will depend on market conditions, share price, applicable legal requirements and other factors.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	6 Months Ended
	Jun. 30, 2018
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- and six-month Three-Month (13-Week) June 30, 2018 Gains and Losses on Foreign Currency Adjustment to Early Total Accumulated other comprehensive income (loss) at March 31, 2018 $ (3,600 ) $ (251,398 ) $ 5,632 $ (249,366 ) Other comprehensive income (loss) before reclassifications (3,647 ) (43,466 ) — (47,113 ) Amounts reclassified from accumulated other comprehensive income (loss) into earnings (1) 447 — — 447 Net current-period other comprehensive income (loss) (3,200 ) (43,466 ) — (46,666 ) Accumulated other comprehensive income (loss) at June 30, 2018 $ (6,800 ) $ (294,864 ) $ 5,632 $ (296,032 ) Six-Month (26-Week) June 30, 2018 Gains and Losses on Hedging Derivatives Foreign Currency Gain (Loss) Adjustment to Early Retiree Medical Plan Total Accumulated other comprehensive income (loss) at December 31, 2017 $ (2,800 ) $ (257,513 ) $ 5,632 $ (254,681 ) Other comprehensive income (loss) before reclassifications (4,399 ) (37,351 ) — (41,750 ) Amounts reclassified from accumulated other comprehensive income (loss) into earnings (1) 399 — — 399 Net current-period other comprehensive income (loss) (4,000 ) (37,351 ) — (41,351 ) Accumulated other comprehensive income (loss) at June 30, 2018 $ (6,800 ) $ (294,864 ) $ 5,632 $ (296,032 ) (1) Includes $447 and $399 of accumulated other comprehensive income reclassifications into cost of products sold for net losses on commodity contracts in the second quarter and first six months of 2018, respectively. The tax impacts of those reclassifications were $100 in both the second quarter and first six months of 2018. Three-Month (13-Week) July 1, 2017 Gains and Losses on Hedging Derivatives Foreign Currency Gain (Loss) Adjustment to Early Retiree Medical Plan Total Accumulated other comprehensive income (loss) at April 1, 2017 $ (400 ) $ (324,169 ) $ 7,577 $ (316,992 ) Other comprehensive income (loss) before reclassifications (71 ) 23,957 — 23,886 Amounts reclassified from accumulated other comprehensive income (loss) into earnings (2) 171 — — 171 Net current-period other comprehensive income (loss) 100 23,957 — 24,057 Accumulated other comprehensive income (loss) at July 1, 2017 $ (300 ) $ (300,212 ) $ 7,577 $ (292,935 ) Six-Month (26-Week) July 1, 2017 Gains and Losses on Hedging Derivatives Foreign Currency Gain (Loss) Adjustment to Early Retiree Medical Plan Total Accumulated other comprehensive income (loss) at December 31, 2016 $ 750 $ (326,170 ) $ 7,577 $ (317,843 ) Other comprehensive income (loss) before reclassifications (1,706 ) 25,958 — 24,252 Amounts reclassified from accumulated other comprehensive income (loss) into earnings (2) 656 — — 656 Net current-period other comprehensive income (loss) (1,050 ) 25,958 — 24,908 Accumulated other comprehensive income (loss) at July 1, 2017 $ (300 ) $ (300,212 ) $ 7,577 $ (292,935 ) (2) Includes $171 and $656 of accumulated other comprehensive income reclassifications into cost of products sold for net losses on commodity contracts in the second quarter and first six months of 2017, respectively. The tax impacts of those reclassifications were $0 and $300 in the second quarter and first six months of 2017, respectively.

Segments

Segments	6 Months Ended
	Jun. 30, 2018
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. Nu-Iron Previously, Nucor’s tubular products and piling products businesses were reported in the steel mills segment. Beginning in the first quarter of 2018, these businesses were reclassified to the steel products segment as part of a realignment of Nucor’s reportable segments to reflect the way in which they are now viewed by management and how segment performance assessments will be made by the chief operating decision maker beginning in such period. The segment data for the comparable periods has also been reclassified into the steel products segment in order to conform to the current year presentation. The steel mills, steel products and raw materials segments are consistent with the way Nucor manages its business, which is primarily based upon the similarity of the types of products produced and sold by each segment. Additionally, the composition of assets by segment at December 31, 2017 was reclassified to conform to the current year presentation. This reclassification between segments did not have any impact on the consolidated asset balances. Net interest expense, other income, 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 investments in and advances to affiliates. Nucor’s results by segment for the second quarter and first six months of 2018 and 2017 were as follows (in thousands): Three Months (13 Weeks) Ended Six Months (26 Weeks) Ended June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 Net sales to external customers: Steel mills $ 4,169,539 $ 3,404,064 $ 7,750,233 $ 6,594,571 Steel products 1,738,370 1,366,693 3,207,081 2,579,050 Raw materials 552,865 404,012 1,071,879 816,327 $ 6,460,774 $ 5,174,769 $ 12,029,193 $ 9,989,948 Intercompany sales: Steel mills $ 1,065,780 $ 759,245 $ 1,964,106 $ 1,417,605 Steel products 50,907 26,664 86,677 56,365 Raw materials 3,155,268 2,459,352 5,764,212 4,637,991 Corporate/eliminations (4,271,955 ) (3,245,261 ) (7,814,995 ) (6,111,961 ) $ — $ — $ — $ — Earnings (loss) before income taxes and noncontrolling interests: Steel mills $ 961,784 $ 579,520 $ 1,522,287 $ 1,223,703 Steel products 155,766 83,636 241,580 150,555 Raw materials 134,995 66,227 209,542 92,618 Corporate/eliminations (338,844 ) (221,247 ) (543,796 ) (409,765 ) $ 913,701 $ 508,136 $ 1,429,613 $ 1,057,111 June 30, 2018 Dec. 31, 2017 Segment assets: Steel mills $ 8,590,433 $ 7,671,217 Steel products 4,672,730 4,323,907 Raw materials 3,573,219 3,396,110 Corporate/eliminations 615,310 450,024 $ 17,451,692 $ 15,841,258

Revenue

Revenue	6 Months Ended
	Jun. 30, 2018
Revenue from Contract with Customer [Abstract]
Revenue	16. REVENUE: Revenue is recognized when obligations under the terms of a contract with our customers are satisfied; generally, this occurs upon shipment or when control is transferred. Revenue is measured as the amount of consideration expected to be received in exchange for transferring the goods. In addition, revenue is deferred when cash payments are received or due in advance of performance. The durations of Nucor’s contracts with customers are generally one year or less. Customer payment terms are generally 30 days. 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 $94.3 million as of June 30, 2018 ($72.3 million as of December 31, 2017), and are included in accrued expenses and other current liabilities in the condensed consolidated balance sheets. The amount of revenue reclassified from the December 31, 2017 contract liabilities balance during the first six months of 2018 was approximately $57.9 million. The following table disaggregates our net sales by major source for the second quarter and first six months of 2018 (in thousands): Three Months (13 Weeks) Ended June 30, 2018 Six Months (26 Weeks) Ended June 30, 2018 Steel Mills Steel Products Raw Materials Total Steel Mills Steel Products Raw Materials Total Sheet $ 1,974,427 $ 1,974,427 $ 3,640,647 $ 3,640,647 Bar 1,258,438 1,258,438 2,348,585 2,348,585 Structural 448,557 448,557 845,254 845,254 Plate 488,117 488,117 915,747 915,747 Tubular Products $ 371,568 371,568 $ 682,796 682,796 Rebar Fabrication 390,921 390,921 720,140 720,140 Other Steel Products 975,881 975,881 1,804,145 1,804,145 Raw Materials $ 552,865 552,865 $ 1,071,879 1,071,879 $ 4,169,539 $ 1,738,370 $ 552,865 $ 6,460,774 $ 7,750,233 $ 3,207,081 $ 1,071,879 $ 12,029,193 STEEL MILLS SEGMENT Sheet – For the majority of sheet products, we transfer control and recognize a sale when we ship the product from the sheet mill to our customer. The amount of consideration we receive and revenue we recognize for spot market sales are based upon prevailing prices at the time of sale. The amount of consideration we receive and revenue we recognize for contract customers are based primarily on pricing formulae that permit price adjustments to reflect changes in the current market-based indices and/or raw material costs near the time of shipment. The amount of tons sold to contract customers at any given time depends on a variety of factors, including our consideration of current and future market conditions, our strategy to appropriately balance spot and contract tons in a manner to meet our customers’ requirements while considering the expected profitability, our desire to sustain a diversified customer base and our end-use customers’ Bar, Structural and Plate – For the majority of bar, structural and plate products, we transfer control and recognize a sale when we ship the product from the mill to our customer. The significant majority of bar, structural and plate product sales are spot market sales, and the amount of consideration we receive and revenue we recognize for those sales are based upon prevailing prices at the time of sale. STEEL PRODUCTS SEGMENT Tubular Products – The tubular products businesses transfer control and recognize a sale when the product is shipped from our operating locations to our customers. The significant majority of tubular product sales are spot market sales, and the amount of consideration we receive and revenue we recognize for those sales are based upon prevailing prices at the time of sale. Rebar Fabrication – The majority of revenue for our rebar fabrication businesses relates to revenue from contracts with customers for the supply of fabricated rebar. For the majority of these transactions, we transfer control and recognize a sale when the products are shipped from our operating locations and collection is reasonably assured. Provisions for losses on incomplete contracts are made in the period in which such losses are determined. Our rebar fabrication businesses also generate a significant amount of revenue from contracts with customers in which they supply fabricated rebar and install it at the customer’s job site. There are two performance obligations for these types of contracts: the supply of the fabricated rebar and the installation of the supplied rebar at the customer’s job site. For the supply of fabricated rebar performance obligation, we transfer control and recognize a sale when the product is delivered to our customer’s job site. The transaction price allocated to this performance obligation is determined at the start of the contract, based on the then current market price for supplied fabricated rebar. For the installation performance obligation, we transfer control and recognize a sale when the delivered material is installed. The transaction price allocated to this performance obligation is determined at the start of the contract, based on the then current market price for the installation of fabricated rebar. Variable consideration occurring from change orders and price escalations caused by changes in underlying material costs for previously satisfied performance obligations are recognized cumulatively in the period in which management believes that the amount of consideration is changed and collection is reasonably assured. Management reviews these situations on a case-by-case Other Steel Products – Other steel products include our joist, deck, cold finish, metal building systems, piling and the other remaining businesses that comprise the steel products segment. Generally for these businesses, we transfer control and recognize a sale when we ship the product from our operating locations to our customers. The amount of consideration we receive and revenue we recognize for those sales are agreed upon with the customers before the product is shipped. RAW MATERIALS SEGMENT The majority of the raw materials segment revenue from outside customers is generated by The David J. Joseph Company and its affiliates. We transfer control and recognize a sale based on the terms of the agreement with the customer, which is generally when the product has met the delivery requirements. The amount of consideration we receive and revenue we recognize for those sales is based on the contract with the customer, which generally reflects current market prices at the time the contract is entered into.

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2018
Earnings Per Share [Abstract]
Earnings Per Share	17. EARNINGS PER SHARE: The computations of basic and diluted net earnings per share for the second quarter and first six months of 2018 and 2017 are as follows (in thousands, except per share amounts): Three Months (13 Weeks) Ended Six Months (26 Weeks) Ended June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 Basic net earnings per share: Basic net earnings $ 683,153 $ 323,048 $ 1,037,332 $ 679,947 Earnings allocated to participating securities (2,919 ) (1,138 ) (3,940 ) (2,333 ) Net earnings available to common stockholders $ 680,234 $ 321,910 $ 1,033,392 $ 677,614 Average shares outstanding 318,467 320,439 318,941 320,332 Basic net earnings per share $ 2.14 $ 1.00 $ 3.24 $ 2.12 Diluted net earnings per share: Diluted net earnings $ 683,153 $ 323,048 $ 1,037,332 $ 679,947 Earnings allocated to participating securities (2,909 ) (1,136 ) (3,926 ) (2,328 ) Net earnings available to common stockholders $ 680,244 $ 321,912 $ 1,033,406 $ 677,619 Diluted average shares outstanding: Basic shares outstanding 318,467 320,439 318,941 320,332 Dilutive effect of stock options and other 924 787 989 854 319,391 321,226 319,930 321,186 Diluted net earnings per share $ 2.13 $ 1.00 $ 3.23 $ 2.11 The following stock options were excluded from the computation of diluted net earnings per share for the second quarter and first six months of 2018 and 2017 because their effect would have been anti-dilutive (in thousands, except per share amounts): Three Months (13 Weeks) Ended Six Months (26 Weeks) Ended June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 Anti-dilutive stock options: Weighted-average shares 265 698 133 349 Weighted-average exercise price $ 65.80 $ 59.07 $ 65.80 $ 59.07

Basis of Interim Presentation (

Basis of Interim Presentation (Policies)	6 Months Ended
	Jun. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Reclassifications	Reclassifications – In the first quarter of 2018, the Company began reporting its tubular products and piling businesses as part of the steel products segment. These businesses were previously included in the steel mills segment and were reclassified to the steel products segment as part of a realignment of Nucor’s reportable segments to reflect the way in which they are now viewed by management and how segment performance assessments will be made by the chief operating decision maker beginning in such period. As a result, certain prior period amounts have been reclassified to conform to the current year presentation. These reclassifications did not have an impact on the condensed consolidated financial statements of the Company for the prior periods presented. See Note 15 for more information related to this segment realignment.
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements – In the first quarter of 2018, we adopted new accounting guidance related to revenue recognition for all contracts using the modified retrospective method. The modified retrospective method requires that the cumulative effect of initially applying this new guidance be recorded as an adjustment to the opening balance of retained earnings in the condensed consolidated balance sheet. The adoption of this new accounting guidance did not have an impact on any prior period earnings attributable to Nucor stockholders, and no adjustment was recorded to the opening retained earnings balance as of January 1, 2018. Retrospective adjustment of comparative prior period information is not required when using the modified retrospective adoption method, and no comparative prior periods have been adjusted for the new guidance. The adoption of the new revenue accounting guidance did not significantly change the way we recognize revenue. To illustrate this, if we had continued using the previous accounting guidance in effect before the adoption of the new revenue accounting guidance, our consolidated net sales for the second quarter and first six months of 2018 would have increased approximately $22.7 million, or 0.4%, and $32.9 million, or 0.3%, respectively, and cost of products sold would have increased by the same amounts. There would have been no impact on any other financial statement line items in the condensed consolidated financial statements for the second quarter or first six months of 2018. See Note 16 for disclosures required by the new revenue accounting guidance. In the first quarter of 2018, we adopted new accounting guidance regarding the recognition and measurement of financial assets and financial liabilities. Changes to the current accounting guidance primarily affect the accounting for equity investments, financial liabilities under the fair value option, and the presentation and disclosure requirements for financial instruments. In addition, the Financial Accounting Standards Board clarified guidance related to the valuation allowance assessment when recognizing deferred tax assets resulting from unrealized losses on available-for-sale In the first quarter of 2018, we adopted new accounting guidance regarding the presentation and classification of certain cash receipts and cash payments in the statement of cash flows. The new guidance addresses specific cash flow presentation issues in order to reduce diversity in existing practice. The adoption of this new guidance did not have a material impact on the Company’s consolidated financial statements. In the first quarter of 2018, we adopted new accounting guidance regarding intra-entity transfers of assets other than inventory. The new guidance requires that an entity should recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. The adoption of this new guidance did not have a material impact on the Company’s consolidated financial statements.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements - In February 2016, new accounting guidance was issued regarding the accounting for leases. The new guidance requires all lessees to recognize on the balance sheet right to use assets and lease liabilities for the rights and obligations created by lease arrangements with terms greater than 12 months. The new guidance is effective for the Company for annual and interim reporting periods beginning after December 15, 2018. While the adoption of this new guidance is expected to increase assets and liabilities due to the recognition of lease rights and obligations on the balance sheet effective January 1, 2019, the Company does not expect the adoption of this new guidance to have a significant impact on its statement of earnings, statement of comprehensive income or statement of cash flows. In February 2018, new accounting guidance was issued regarding the tax effects of the Tax Cuts and Jobs Act (the “Tax Reform Act”). The new guidance allows for a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Reform Act to improve the usefulness of information reported to financial statement users. The new guidance is effective for the Company for annual and interim reporting periods beginning after December 15, 2018. The Company does not expect the adoption of this new guidance to have a material impact on its consolidated financial statements.

Goodwill and Other Intangible25

Goodwill and Other Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2018
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 six months ended June 30, 2018, by segment, was as follows (in thousands): Steel Mills Steel Products Raw Materials Total Balance at December 31, 2017 $ 745,484 $ 720,997 $ 729,577 $ 2,196,058 Translation — (10,249 ) — (10,249 ) Reclassifications (153,498 ) 153,498 — — Balance at June 30, 2018 $ 591,986 $ 864,246 $ 729,577 $ 2,185,809
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 June 30, 2018 and December 31, 2017 (in thousands): June 30, 2018 December 31, 2017 Gross Accumulated Gross Accumulated Customer relationships $ 1,418,437 $ 677,547 $ 1,420,224 $ 641,089 Trademarks and trade names 176,089 82,426 176,471 77,208 Other 62,806 29,454 62,805 26,557 $ 1,657,332 $ 789,427 $ 1,659,500 $ 744,854

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2018
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 are measured at fair value as of June 30, 2018 and December 31, 2017 (in thousands). Nucor does not have any non-financial non-financial Fair Value Measurements at Reporting Date Description Carrying Quoted Prices (Level 1) Significant Significant (Level 3) As of June 30, 2018 Assets: Cash equivalents $ 1,178,986 $ 1,178,986 $ — $ — Derivative contracts 6,455 — 6,455 — Total assets $ 1,185,441 $ 1,178,986 $ 6,455 $ — Liabilities: Derivative contracts $ (9,000 ) $ — $ (9,000 ) $ — As of December 31, 2017 Assets: Cash equivalents $ 594,946 $ 594,946 $ — $ — Short-term investments 50,000 50,000 — — Derivative contracts 479 — 479 — Total assets $ 645,425 $ 644,946 $ 479 $ — Liabilities: Derivative contracts $ (8,531 ) $ — $ (8,531 ) $ —

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Stock Option Plans Activity	A summary of activity under Nucor’s stock option plans for the first six months of 2018 is as follows (in thousands, except years and per share amounts): Shares Weighted - Weighted - Aggregate Number of shares under stock options: Outstanding at beginning of year 4,106 $ 47.96 Granted 265 $ 65.80 Exercised (288 ) $ 42.64 $ 7,253 Canceled — $ — Outstanding at June 30, 2018 4,083 $ 49.49 6.8 years $ 53,997 Stock options exercisable at June 30, 2018 2,368 $ 45.50 5.6 years $ 40,350
Schedule of Grant Date Fair Value Black-Scholes Option-Pricing Model Assumptions	For the 2018 stock option grant, the grant date fair value of $15.07 per share was calculated using the Black-Scholes option-pricing model with the following assumptions: Exercise price $ 65.80 Expected dividend yield 2.31 % Expected stock price volatility 25.28 % Risk-free interest rate 2.85 % Expected life (years) 6.5
Summary of Nucor's RSU Activity	A summary of Nucor’s RSU activity for the first six months of 2018 is as follows (shares in thousands): Shares Grant Date RSUs: Unvested at beginning of year 1,071 $ 52.62 Granted 1,013 $ 65.80 Vested (762 ) $ 59.20 Canceled (10 ) $ 53.50 Unvested at June 30, 2018 1,312 $ 58.97
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 six months of 2018 is as follows (shares in thousands): Shares Grant Date RSUs and Restricted stock awards: Unvested at beginning of year 91 $ 54.50 Granted 256 $ 67.68 Vested (212 ) $ 64.99 Canceled — — Unvested at June 30, 2018 135 $ 62.99

Interest Expense (Income) (Tabl

Interest Expense (Income) (Tables)	6 Months Ended
	Jun. 30, 2018
Banking and Thrift, Interest [Abstract]
Schedule of Components of Net Interest Expense	The components of net interest expense for the second quarter and first six months of 2018 and 2017 are as follows (in thousands): Three Months (13 Weeks) Ended Six Months (26 Weeks) Ended June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 Interest expense $ 35,341 $ 47,565 $ 75,519 $ 93,865 Interest income (5,890 ) (2,985 ) (8,954 ) (5,680 ) Interest expense, net $ 29,451 $ 44,580 $ 66,565 $ 88,185

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	6 Months Ended
	Jun. 30, 2018
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 six months ended June 30, 2018 and July 1, 2017 (in thousands): Attributable to Attributable to Total Stockholders’ equity at December 31, 2017 $ 8,739,036 $ 345,752 $ 9,084,788 Total comprehensive income 995,981 56,395 1,052,376 Stock options 16,218 — 16,218 Issuance of stock under award plans, net of forfeitures 34,706 — 34,706 Amortization of unearned compensation 1,000 — 1,000 Treasury stock acquired (170,315 ) — (170,315 ) Dividends declared (243,219 ) — (243,219 ) Distributions to noncontrolling interests — (40,130 ) (40,130 ) Stockholders’ equity at June 30, 2018 $ 9,373,407 $ 362,017 $ 9,735,424 Attributable to Attributable to Total Stockholders’ equity at December 31, 2016 $ 7,879,865 $ 374,843 $ 8,254,708 Total comprehensive income 704,855 39,425 744,280 Stock options 11,068 — 11,068 Issuance of stock under award plans, net of forfeitures 23,593 — 23,593 Amortization of unearned compensation 700 — 700 Dividends declared (243,016 ) — (243,016 ) Distributions to noncontrolling interests — (79,420 ) (79,420 ) Stockholders’ equity at July 1, 2017 $ 8,377,065 $ 334,848 $ 8,711,913

Accumulated Other Comprehensi30

Accumulated Other Comprehensive Income (Loss) (Tables)	6 Months Ended
	Jun. 30, 2018
Equity [Abstract]
Components of Accumulated Comprehensive Income (Loss)	The following tables reflect the changes in accumulated other comprehensive income (loss) by component for the three- and six-month Three-Month (13-Week) June 30, 2018 Gains and Losses on Foreign Currency Adjustment to Early Total Accumulated other comprehensive income (loss) at March 31, 2018 $ (3,600 ) $ (251,398 ) $ 5,632 $ (249,366 ) Other comprehensive income (loss) before reclassifications (3,647 ) (43,466 ) — (47,113 ) Amounts reclassified from accumulated other comprehensive income (loss) into earnings (1) 447 — — 447 Net current-period other comprehensive income (loss) (3,200 ) (43,466 ) — (46,666 ) Accumulated other comprehensive income (loss) at June 30, 2018 $ (6,800 ) $ (294,864 ) $ 5,632 $ (296,032 ) Six-Month (26-Week) June 30, 2018 Gains and Losses on Hedging Derivatives Foreign Currency Gain (Loss) Adjustment to Early Retiree Medical Plan Total Accumulated other comprehensive income (loss) at December 31, 2017 $ (2,800 ) $ (257,513 ) $ 5,632 $ (254,681 ) Other comprehensive income (loss) before reclassifications (4,399 ) (37,351 ) — (41,750 ) Amounts reclassified from accumulated other comprehensive income (loss) into earnings (1) 399 — — 399 Net current-period other comprehensive income (loss) (4,000 ) (37,351 ) — (41,351 ) Accumulated other comprehensive income (loss) at June 30, 2018 $ (6,800 ) $ (294,864 ) $ 5,632 $ (296,032 ) (1) Includes $447 and $399 of accumulated other comprehensive income reclassifications into cost of products sold for net losses on commodity contracts in the second quarter and first six months of 2018, respectively. The tax impacts of those reclassifications were $100 in both the second quarter and first six months of 2018. Three-Month (13-Week) July 1, 2017 Gains and Losses on Hedging Derivatives Foreign Currency Gain (Loss) Adjustment to Early Retiree Medical Plan Total Accumulated other comprehensive income (loss) at April 1, 2017 $ (400 ) $ (324,169 ) $ 7,577 $ (316,992 ) Other comprehensive income (loss) before reclassifications (71 ) 23,957 — 23,886 Amounts reclassified from accumulated other comprehensive income (loss) into earnings (2) 171 — — 171 Net current-period other comprehensive income (loss) 100 23,957 — 24,057 Accumulated other comprehensive income (loss) at July 1, 2017 $ (300 ) $ (300,212 ) $ 7,577 $ (292,935 ) Six-Month (26-Week) July 1, 2017 Gains and Losses on Hedging Derivatives Foreign Currency Gain (Loss) Adjustment to Early Retiree Medical Plan Total Accumulated other comprehensive income (loss) at December 31, 2016 $ 750 $ (326,170 ) $ 7,577 $ (317,843 ) Other comprehensive income (loss) before reclassifications (1,706 ) 25,958 — 24,252 Amounts reclassified from accumulated other comprehensive income (loss) into earnings (2) 656 — — 656 Net current-period other comprehensive income (loss) (1,050 ) 25,958 — 24,908 Accumulated other comprehensive income (loss) at July 1, 2017 $ (300 ) $ (300,212 ) $ 7,577 $ (292,935 ) (2) Includes $171 and $656 of accumulated other comprehensive income reclassifications into cost of products sold for net losses on commodity contracts in the second quarter and first six months of 2017, respectively. The tax impacts of those reclassifications were $0 and $300 in the second quarter and first six months of 2017, respectively.

Segments (Tables)

Segments (Tables)	6 Months Ended
	Jun. 30, 2018
Segment Reporting [Abstract]
Segments	Nucor’s results by segment for the second quarter and first six months of 2018 and 2017 were as follows (in thousands): Three Months (13 Weeks) Ended Six Months (26 Weeks) Ended June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 Net sales to external customers: Steel mills $ 4,169,539 $ 3,404,064 $ 7,750,233 $ 6,594,571 Steel products 1,738,370 1,366,693 3,207,081 2,579,050 Raw materials 552,865 404,012 1,071,879 816,327 $ 6,460,774 $ 5,174,769 $ 12,029,193 $ 9,989,948 Intercompany sales: Steel mills $ 1,065,780 $ 759,245 $ 1,964,106 $ 1,417,605 Steel products 50,907 26,664 86,677 56,365 Raw materials 3,155,268 2,459,352 5,764,212 4,637,991 Corporate/eliminations (4,271,955 ) (3,245,261 ) (7,814,995 ) (6,111,961 ) $ — $ — $ — $ — Earnings (loss) before income taxes and noncontrolling interests: Steel mills $ 961,784 $ 579,520 $ 1,522,287 $ 1,223,703 Steel products 155,766 83,636 241,580 150,555 Raw materials 134,995 66,227 209,542 92,618 Corporate/eliminations (338,844 ) (221,247 ) (543,796 ) (409,765 ) $ 913,701 $ 508,136 $ 1,429,613 $ 1,057,111 June 30, 2018 Dec. 31, 2017 Segment assets: Steel mills $ 8,590,433 $ 7,671,217 Steel products 4,672,730 4,323,907 Raw materials 3,573,219 3,396,110 Corporate/eliminations 615,310 450,024 $ 17,451,692 $ 15,841,258

Revenue (Tables)

Revenue (Tables)	6 Months Ended
	Jun. 30, 2018
Revenue from Contract with Customer [Abstract]
Schedule of Net Sales Disaggregates by Major Source	The following table disaggregates our net sales by major source for the second quarter and first six months of 2018 (in thousands): Three Months (13 Weeks) Ended June 30, 2018 Six Months (26 Weeks) Ended June 30, 2018 Steel Mills Steel Products Raw Materials Total Steel Mills Steel Products Raw Materials Total Sheet $ 1,974,427 $ 1,974,427 $ 3,640,647 $ 3,640,647 Bar 1,258,438 1,258,438 2,348,585 2,348,585 Structural 448,557 448,557 845,254 845,254 Plate 488,117 488,117 915,747 915,747 Tubular Products $ 371,568 371,568 $ 682,796 682,796 Rebar Fabrication 390,921 390,921 720,140 720,140 Other Steel Products 975,881 975,881 1,804,145 1,804,145 Raw Materials $ 552,865 552,865 $ 1,071,879 1,071,879 $ 4,169,539 $ 1,738,370 $ 552,865 $ 6,460,774 $ 7,750,233 $ 3,207,081 $ 1,071,879 $ 12,029,193

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2018
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 second quarter and first six months of 2018 and 2017 are as follows (in thousands, except per share amounts): Three Months (13 Weeks) Ended Six Months (26 Weeks) Ended June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 Basic net earnings per share: Basic net earnings $ 683,153 $ 323,048 $ 1,037,332 $ 679,947 Earnings allocated to participating securities (2,919 ) (1,138 ) (3,940 ) (2,333 ) Net earnings available to common stockholders $ 680,234 $ 321,910 $ 1,033,392 $ 677,614 Average shares outstanding 318,467 320,439 318,941 320,332 Basic net earnings per share $ 2.14 $ 1.00 $ 3.24 $ 2.12 Diluted net earnings per share: Diluted net earnings $ 683,153 $ 323,048 $ 1,037,332 $ 679,947 Earnings allocated to participating securities (2,909 ) (1,136 ) (3,926 ) (2,328 ) Net earnings available to common stockholders $ 680,244 $ 321,912 $ 1,033,406 $ 677,619 Diluted average shares outstanding: Basic shares outstanding 318,467 320,439 318,941 320,332 Dilutive effect of stock options and other 924 787 989 854 319,391 321,226 319,930 321,186 Diluted net earnings per share $ 2.13 $ 1.00 $ 3.23 $ 2.11
Anti-dilutive Stock Options	The following stock options were excluded from the computation of diluted net earnings per share for the second quarter and first six months of 2018 and 2017 because their effect would have been anti-dilutive (in thousands, except per share amounts): Three Months (13 Weeks) Ended Six Months (26 Weeks) Ended June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 Anti-dilutive stock options: Weighted-average shares 265 698 133 349 Weighted-average exercise price $ 65.80 $ 59.07 $ 65.80 $ 59.07

Basis of Interim Presentation -

Basis of Interim Presentation - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Amount of increase in consolidated net sales if previous accounting guidance had continued to be used	$ 22.7	$ 32.9
Amount of increase in revenue had previous accounting method been used as a percentage of sales	0.40%	0.30%
Amount of increase in consolidated cost of products sold if previous accounting guidance had continued to be used	$ 22.7	$ 32.9

Inventories - Additional Inform

Inventories - Additional Information (Detail)	Jun. 30, 2018	Dec. 31, 2017
Inventory Disclosure [Abstract]
Raw materials and supplies in inventory, percentage	42.00%	42.00%
Finished and semi-finished products in inventory, percentage	58.00%	58.00%

Property, Plant and Equipment -

Property, Plant and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Accumulated depreciation	$ 8,890,000	$ 8,700,000
Property, plant and equipment, net	5,122,381	5,093,147
Combined Carrying Value of the Three Groups of Wells [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 241,000	$ 252,000

Goodwill and Other Intangible37

Goodwill and Other Intangible Assets - Schedule of Change in Net Carrying Amount of Goodwill by Segment (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2018USD ($)
Goodwill [Line Items]
Balance, beginning of period	$ 2,196,058
Translation	(10,249)
Balance, end of period	2,185,809
Steel Mills [Member]
Goodwill [Line Items]
Balance, beginning of period	745,484
Reclassifications	(153,498)
Balance, end of period	591,986
Steel Products [Member]
Goodwill [Line Items]
Balance, beginning of period	720,997
Translation	(10,249)
Reclassifications	153,498
Balance, end of period	864,246
Raw Materials [Member]
Goodwill [Line Items]
Balance, beginning of period	729,577
Balance, end of period	$ 729,577

Goodwill and Other Intangible38

Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017	Jul. 01, 2017	Jul. 01, 2018	Jun. 30, 2018	Dec. 31, 2017
Finite And Indefinite Lived Intangible Assets [Line Items]
Impairment of goodwill		$ 0
Intangible asset amortization expense	$ 22,100,000		$ 23,000,000	$ 45,400,000	$ 44,600,000
Future amortization expense, in 2018	88,600,000				88,600,000
Future amortization expense, in 2019	86,700,000				86,700,000
Future amortization expense, in 2020	84,400,000				84,400,000
Future amortization expense, in 2021	83,100,000				83,100,000
Future amortization expense, in 2022	$ 80,800,000				$ 80,800,000
Minimum [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Intangible assets, useful life					5 years	5 years
Maximum [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Intangible assets, useful life					22 years	22 years

Goodwill and Other Intangible39

Goodwill and Other Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Amount	$ 1,657,332	$ 1,659,500
Intangible assets, Accumulated Amortization	789,427	744,854
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Amount	1,418,437	1,420,224
Intangible assets, Accumulated Amortization	677,547	641,089
Trademarks and Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Amount	176,089	176,471
Intangible assets, Accumulated Amortization	82,426	77,208
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Amount	62,806	62,805
Intangible assets, Accumulated Amortization	$ 29,454	$ 26,557

Equity Investments - Additional

Equity Investments - Additional Information (Detail) $ in Thousands, € in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018USD ($)	Jul. 01, 2017USD ($)	Jun. 30, 2018USD ($)Sheet	Jul. 01, 2017USD ($)	Jun. 30, 2018EUR (€)	Dec. 31, 2017USD ($)	Dec. 31, 2017EUR (€)
Schedule of Equity Method Investments [Line Items]
Equity method investment	$ 808,900		$ 808,900			$ 750,100
Distributions from affiliates			27,453	$ 46,877
Amortization expense due to fair value step-up			44,573	45,443
NuMit LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment	$ 317,700		$ 317,700			321,400
Equity method investment, ownership percentage	50.00%		50.00%		50.00%
Period used for lag basis, in months			1 month
Distributions from affiliates			$ 27,500	46,900
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 investment	$ 275,200		$ 275,200			285,900
Equity method investment, ownership percentage	50.00%		50.00%		50.00%
Period used for lag basis, in months			1 month
Equity method investments, share of net assets	$ 114,500		$ 114,500
Basis difference due to the step-up to fair value of certain assets and liabilities	160,700		160,700
Step-up to fair value of equity method investment, portion related to identification of goodwill			89,800
Amortization expense due to fair value step-up	2,300	$ 2,200	4,800	$ 4,300
Due from related parties, noncurrent	40,800		$ 40,800		€ 35	41,900	€ 35
Notes receivable, related parties, interest rate			0.83%
Interest rate per year in excess of Euribor as of date of the notes			1.00%
Equity method investments notes payable with parent company, maturity date			Jan. 31, 2022
Nucor JFE [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment	$ 102,700		$ 102,700			71,100
Equity method investment, ownership percentage	50.00%		50.00%		50.00%
Period used for lag basis, in months			1 month
Facility A [Member] | Duferdofin Nucor S.r.l. [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investments credit facilities, amount	$ 186,400		$ 186,400		€ 160
Total amount outstanding under equity method investments credit facilities	$ 163,100		$ 163,100		€ 140	$ 146,700	€ 122.5
Guarantor obligation percentage of exposure in case of default	50.00%		50.00%		50.00%
Line of credit facility, maturity period			Apr. 16, 2021

Current Liabilities - Additiona

Current Liabilities - Additional Information (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Liabilities, Current [Abstract]
Book overdrafts	$ 163.2	$ 139.2
Dividends payable, current	$ 121.3	$ 121.8

Fair Value Measurements - Sched

Fair Value Measurements - Schedule of Financial Assets and Liabilities Measured at Fair Value (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term investments		$ 50,000
Total assets	$ 17,451,692	15,841,258
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	1,178,986	594,946
Short-term investments		50,000
Derivative contracts	6,455	479
Total assets	1,185,441	645,425
Derivative contracts	(9,000)	(8,531)
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	1,178,986	594,946
Short-term investments		50,000
Total assets	1,178,986	644,946
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative contracts	6,455	479
Total assets	6,455	479
Derivative contracts	$ (9,000)	$ (8,531)

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Fair value of short-term and long-term debt, including current maturities	$ 4,530	$ 4,190

Contingencies - Additional Info

Contingencies - Additional Information (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Accrual for environmental loss contingencies, gross	$ 16.7	$ 17.1
Accrued environmental loss contingencies, current	2.4	3.8
Accrued environmental loss contingencies, noncurrent	$ 14.3	$ 13.3

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018USD ($)shares	Jul. 01, 2017USD ($)	Jun. 30, 2018USD ($)$ / sharesAnniversariesInstallmentshares	Jul. 01, 2017USD ($)	May 08, 2014shares
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%
Grant date fair value of stock options granted | $ / shares			$ 15.07
Compensation expenses for stock options	$ 3.6	$ 7.2	$ 4	$ 7.5
Omnibus Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation, common stock available for grant | shares	6		6		13
Inactive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance | shares	2		2
Restricted Stock [Member] | LTIP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Portion of restricted stock award vesting on anniversary			0.333%
Eligible age of officer for restricted stock award			55 years
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to stock	$ 62.1		$ 62.1
Weighted-average recognition period for unrecognized compensation expense related to stock (years)	2 years 1 month 6 days
Number of anniversaries of grant date upon which restricted stock units vest | Anniversaries			3
Installments in which restricted stock units vest and are converted to common stock | Installment			3
Compensation expense	$ 32.6	21.1	$ 38.3	26.1
Restricted Stock Units [Member] | AIP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Eligible age of officer for restricted stock award			55 years
Amount of annual incentive award payment participant can elect to defer			50.00%
Additional common stock units for election of deferred annual incentive award, percentage			25.00%
Restricted Stock And Restricted Stock Units [Member] | AIP and LTIP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to stock	2.4		$ 2.4
Weighted-average recognition period for unrecognized compensation expense related to stock (years)			2 years
Compensation expense	5.3	$ 3.2	$ 9.7	$ 7.5
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	$ 2.2		$ 2.2
Weighted-average recognition period for unrecognized compensation expense related to stock (years)			2 years 1 month 6 days

Stock-Based Compensation - Sche

Stock-Based Compensation - Schedule of Stock Option Plans Activity (Detail) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 2018USD ($)$ / sharesshares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Outstanding at beginning of year, Shares | shares	4,106
Granted, Shares | shares	265
Exercised, Shares | shares	(288)
Canceled, Shares | shares	0
Outstanding at end of year, Shares | shares	4,083
Stock Options exercisable at end of year, Shares | shares	2,368
Outstanding at beginning of year, Weighted - Average Exercise Price | $ / shares	$ 47.96
Granted, Weighted - Average Exercise Price | $ / shares	65.80
Exercised, Weighted - Average Exercise Price | $ / shares	42.64
Canceled, Weighted - Average Exercise Price | $ / shares	0
Outstanding at end of period, Weighted - Average Exercise Price | $ / shares	49.49
Stock options exercisable at end of year, Weighted - Average Exercise Price | $ / shares	$ 45.50
Outstanding at end of period, Weighted - Average Remaining Contractual Life	6 years 9 months 18 days
Stock options exercisable at end of period, Weighted - Average Remaining Contractual Life	5 years 7 months 6 days
Exercised, Aggregate Intrinsic Value | $	$ 7,253
Outstanding at end of period, Aggregate Intrinsic Value | $	53,997
Stock options exercisable at end of period, Aggregate Intrinsic Value | $	$ 40,350

Stock-Based Compensation - Sc47

Stock-Based Compensation - Schedule of Grant Date Fair Value Black-Scholes Option-Pricing Model Assumptions (Detail)	6 Months Ended
	Jun. 30, 2018$ / shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Exercise price	$ 65.80
Expected dividend yield	2.31%
Expected stock price volatility	25.28%
Risk-free interest rate	2.85%
Expected life (years)	6 years 6 months

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of Nucor's RSU Activity (Detail) - Restricted Stock Units [Member] shares in Thousands	6 Months Ended
	Jun. 30, 2018$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested at beginning of year, Shares | shares	1,071
Granted, Shares | shares	1,013
Vested, Shares | shares	(762)
Canceled, Shares | shares	(10)
Unvested at end of year, Shares | shares	1,312
Unvested at beginning of year, Grant Date Fair Value | $ / shares	$ 52.62
Granted, Grant Date Fair Value | $ / shares	65.80
Vested, Grant Date Fair Value | $ / shares	59.20
Canceled, Grant Date Fair Value | $ / shares	53.50
Unvested at end of year, Grant Date Fair Value | $ / shares	$ 58.97

Stock-Based Compensation - Su49

Stock-Based Compensation - Summary of Nucor's Restricted Stock Activity under AIP and LTIP (Detail) - Restricted Stock And Restricted Stock Units [Member] - AIP and LTIP [Member] shares in Thousands	6 Months Ended
	Jun. 30, 2018$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested at beginning of year, Shares | shares	91
Granted, Shares | shares	256
Vested, Shares | shares	(212)
Canceled, Shares | shares	0
Unvested at end of year, Shares | shares	135
Unvested at beginning of year, Grant Date Fair Value | $ / shares	$ 54.50
Granted, Grant Date Fair Value | $ / shares	67.68
Vested, Grant Date Fair Value | $ / shares	64.99
Canceled, Grant Date Fair Value | $ / shares	0
Unvested at end of year, Grant Date Fair Value | $ / shares	$ 62.99

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jul. 30, 2018	Jul. 01, 2017
Employee Benefit Plan [Abstract]
Profit Sharing and Retirement Savings Plan, plan expense	$ 88.4	$ 48.5	$ 140.1	$ 102.5

Interest Expense (Income) - Sch

Interest Expense (Income) - Schedule of Components of Net Interest Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Interest Revenue (Expense), Net [Abstract]
Interest expense	$ 35,341	$ 47,565	$ 75,519	$ 93,865
Interest income	(5,890)	(2,985)	(8,954)	(5,680)
Interest expense, net	$ 29,451	$ 44,580	$ 66,565	$ 88,185

Interest Expense (Income) - Add

Interest Expense (Income) - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Dec. 31, 2017	Jun. 30, 2018
Interest Expense [Line Items]
Long term debt, repaid		$ 500,000
Notes, 5.75%, Due 2017 [Member]
Interest Expense [Line Items]
Long term debt, repaid	$ 600,000
Debt instrument interest rate		5.75%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Effective income tax rate	21.90%	32.70%
U.S. corporate federal income tax rate	21.00%	35.00%
Non-current deferred tax liabilities included in deferred credits and other liabilities	$ 376.6		$ 329.3
Non-current deferred tax assets included in other assets	$ 0.7		$ 0.6

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($)	Jun. 30, 2018	Sep. 02, 2015
Nucor-Yamato Steel Company [Member]
Stockholders' Equity [Line Items]
Noncontrolling interest, ownership percentage by parent	51.00%
Common Stock [Member]
Stockholders' Equity [Line Items]
Share repurchase program remaining amount	$ 567,700,000
Common Stock [Member] | Maximum [Member]
Stockholders' Equity [Line Items]
Share repurchase program authorized amount		$ 900,000,000

Stockholders' Equity - Schedule

Stockholders' Equity - Schedule of Change in Stockholder's Equity (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Stockholders' Equity [Line Items]
Stockholders' equity, beginning of period			$ 9,084,788	$ 8,254,708
Total comprehensive income	$ 666,949	$ 365,781	1,052,376	744,280
Stock options			16,218	11,068
Issuance of stock under award plans, net of forfeitures			34,706	23,593
Amortization of unearned compensation			1,000	700
Treasury stock acquired			(170,315)
Dividends declared			(243,219)	(243,016)
Distributions to noncontrolling interests			(40,130)	(79,420)
Stockholders' equity, end of period	9,735,424	8,711,913	9,735,424	8,711,913
Total Nucor Stockholders' Equity [Member]
Stockholders' Equity [Line Items]
Stockholders' equity, beginning of period			8,739,036	7,879,865
Total comprehensive income			995,981	704,855
Stock options			16,218	11,068
Issuance of stock under award plans, net of forfeitures			34,706	23,593
Amortization of unearned compensation			1,000	700
Treasury stock acquired			(170,315)
Dividends declared			(243,219)	(243,016)
Stockholders' equity, end of period	9,373,407	8,377,065	9,373,407	8,377,065
Noncontrolling Interests [Member]
Stockholders' Equity [Line Items]
Stockholders' equity, beginning of period			345,752	374,843
Total comprehensive income			56,395	39,425
Distributions to noncontrolling interests			(40,130)	(79,420)
Stockholders' equity, end of period	$ 362,017	$ 334,848	$ 362,017	$ 334,848

Accumulated Other Comprehensi56

Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Comprehensive Loss (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning Balance, Gains and Losses on Hedging Derivatives	$ (3,600)	$ (400)	$ (2,800)	$ 750
Other comprehensive income (loss) before reclassifications, Gains and Losses on Hedging Derivatives	(3,647)	(71)	(4,399)	(1,706)
Amounts reclassified from accumulated other comprehensive (loss) income into earnings, Gains and Losses on Hedging Derivatives	447	171	399	656
Net current-period other comprehensive income (loss), Gains and Losses on Hedging Derivatives	(3,200)	100	(4,000)	(1,050)
Ending Balance, Gains and Losses on Hedging Derivatives	(6,800)	(300)	(6,800)	(300)
Beginning Balance, Foreign Currency Gains and losses	(251,398)	(324,169)	(257,513)	(326,170)
Other comprehensive income (loss) before reclassifications, Foreign Currency Gains and Losses	(43,466)	23,957	(37,351)	25,958
Amounts reclassified from accumulated other comprehensive (loss) income into earnings, Foreign Currency Gains and Losses	0	0	0	0
Net current-period other comprehensive (loss) income, Foreign Currency Gains and losses	(43,466)	23,957	(37,351)	25,958
Ending Balance, Foreign Currency Gains and losses	(294,864)	(300,212)	(294,864)	(300,212)
Beginning Balance, Adjustment to Early Retiree Medical Plan	5,632	7,577	5,632	7,577
Other comprehensive income (loss) before reclassifications, Adjustment to Early Retiree Medical Plan	0	0	0	0
Amounts reclassified from accumulated other comprehensive (loss) income into earnings, Adjustment to Early Retiree Medical Plan	0	0	0	0
Net current-period other comprehensive (loss) income , Adjustment to Early Retiree Medical Plan	0	0	0	0
Ending Balance, Adjustment to Early Retiree Medical Plan	5,632	7,577	5,632	7,577
Beginning Balance	(249,366)	(316,992)	(254,681)	(317,843)
Other comprehensive income (loss) before reclassifications	(47,113)	23,886	(41,750)	24,252
Amounts reclassified from accumulated other comprehensive (loss) income into earnings	447	171	399	656
Net current-period other comprehensive income (loss)	(46,666)	24,057	(41,351)	24,908
Ending Balance	$ (296,032)	$ (292,935)	$ (296,032)	$ (292,935)

Accumulated Other Comprehensi57

Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Comprehensive Loss (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified from accumulated other comprehensive (loss) income into earnings, Gains and Losses on Hedging Derivatives	$ 447	$ 171	$ 399	$ 656
AOCI reclassification impact on tax	100	0	100	300
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	447	171	399	656
AOCI reclassification impact on tax	$ 100	$ 0	$ 100	$ 300

Segments - Segments (Detail)

Segments - Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Net sales	$ 6,460,774	$ 5,174,769	$ 12,029,193	$ 9,989,948
Earnings (loss) before income taxes and noncontrolling interests	913,701	508,136	1,429,613	1,057,111
Total assets	17,451,692		17,451,692		$ 15,841,258
Operating Segments [Member] | Steel Mills [Member]
Segment Reporting Information [Line Items]
Net sales	4,169,539	3,404,064	7,750,233	6,594,571
Earnings (loss) before income taxes and noncontrolling interests	961,784	579,520	1,522,287	1,223,703
Total assets	8,590,433		8,590,433		7,671,217
Operating Segments [Member] | Steel Products [Member]
Segment Reporting Information [Line Items]
Net sales	1,738,370	1,366,693	3,207,081	2,579,050
Earnings (loss) before income taxes and noncontrolling interests	155,766	83,636	241,580	150,555
Total assets	4,672,730		4,672,730		4,323,907
Operating Segments [Member] | Raw Materials [Member]
Segment Reporting Information [Line Items]
Net sales	552,865	404,012	1,071,879	816,327
Earnings (loss) before income taxes and noncontrolling interests	134,995	66,227	209,542	92,618
Total assets	3,573,219		3,573,219		3,396,110
Corporate and Eliminations Items [Member]
Segment Reporting Information [Line Items]
Net sales	(4,271,955)	(3,245,261)	(7,814,995)	(6,111,961)
Earnings (loss) before income taxes and noncontrolling interests	(338,844)	(221,247)	(543,796)	(409,765)
Total assets	615,310		615,310		$ 450,024
Intercompany Eliminations [Member] | Steel Mills [Member]
Segment Reporting Information [Line Items]
Net sales	1,065,780	759,245	1,964,106	1,417,605
Intercompany Eliminations [Member] | Steel Products [Member]
Segment Reporting Information [Line Items]
Net sales	50,907	26,664	86,677	56,365
Intercompany Eliminations [Member] | Raw Materials [Member]
Segment Reporting Information [Line Items]
Net sales	$ 3,155,268	$ 2,459,352	$ 5,764,212	$ 4,637,991

Revenue - Additional Informatio

Revenue - Additional Information (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Revenue from Contract with Customers [Line Items]
Contract with customer, timing of satisfaction of performance obligation and payment	The durations of Nucor's contracts with customers are generally one year or less. Customer payment terms are generally 30 days.
Contract liabilities	$ 94.3	$ 72.3
Revenue reclassified from contract liabilities	$ 57.9
Steel Mills [Member]
Revenue from Contract with Customers [Line Items]
Contract with customer, timing of satisfaction of performance obligation and payment	One year or less

Revenue - Schedule of Net Sales

Revenue - Schedule of Net Sales Disaggregates by Major Source (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018
Revenue from Contract with Customers [Line Items]
Revenues	$ 6,460,774	$ 12,029,193
Sheet [Member]
Revenue from Contract with Customers [Line Items]
Revenues	1,974,427	3,640,647
Bar [Member]
Revenue from Contract with Customers [Line Items]
Revenues	1,258,438	2,348,585
Structural [Member]
Revenue from Contract with Customers [Line Items]
Revenues	448,557	845,254
Plate [Member]
Revenue from Contract with Customers [Line Items]
Revenues	488,117	915,747
Tubular Products [Member]
Revenue from Contract with Customers [Line Items]
Revenues	371,568	682,796
Rebar Fabrication [Member]
Revenue from Contract with Customers [Line Items]
Revenues	390,921	720,140
Other Steel Products [Member]
Revenue from Contract with Customers [Line Items]
Revenues	975,881	1,804,145
Raw Materials [Member]
Revenue from Contract with Customers [Line Items]
Revenues	552,865	1,071,879
Steel Mills [Member]
Revenue from Contract with Customers [Line Items]
Revenues	4,169,539	7,750,233
Steel Mills [Member] | Sheet [Member]
Revenue from Contract with Customers [Line Items]
Revenues	1,974,427	3,640,647
Steel Mills [Member] | Bar [Member]
Revenue from Contract with Customers [Line Items]
Revenues	1,258,438	2,348,585
Steel Mills [Member] | Structural [Member]
Revenue from Contract with Customers [Line Items]
Revenues	448,557	845,254
Steel Mills [Member] | Plate [Member]
Revenue from Contract with Customers [Line Items]
Revenues	488,117	915,747
Steel Products [Member]
Revenue from Contract with Customers [Line Items]
Revenues	1,738,370	3,207,081
Steel Products [Member] | Tubular Products [Member]
Revenue from Contract with Customers [Line Items]
Revenues	371,568	682,796
Steel Products [Member] | Rebar Fabrication [Member]
Revenue from Contract with Customers [Line Items]
Revenues	390,921	720,140
Steel Products [Member] | Other Steel Products [Member]
Revenue from Contract with Customers [Line Items]
Revenues	975,881	1,804,145
Raw Materials [Member]
Revenue from Contract with Customers [Line Items]
Revenues	552,865	1,071,879
Raw Materials [Member] | Raw Materials [Member]
Revenue from Contract with Customers [Line Items]
Revenues	$ 552,865	$ 1,071,879

Earnings Per Share - Computatio

Earnings Per Share - Computations of Basic and Diluted Net Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Earnings Per Share [Abstract]
Basic net earnings	$ 683,153	$ 323,048	$ 1,037,332	$ 679,947
Earnings allocated to participating securities, Basic	(2,919)	(1,138)	(3,940)	(2,333)
Net earnings available to common stockholders, Basic	$ 680,234	$ 321,910	$ 1,033,392	$ 677,614
Average shares outstanding	318,467	320,439	318,941	320,332
Basic net earnings per share	$ 2.14	$ 1	$ 3.24	$ 2.12
Diluted net earnings	$ 683,153	$ 323,048	$ 1,037,332	$ 679,947
Earnings allocated to participating securities, Diluted	(2,909)	(1,136)	(3,926)	(2,328)
Net earnings available to common stockholders, Diluted	$ 680,244	$ 321,912	$ 1,033,406	$ 677,619
Basic shares outstanding	318,467	320,439	318,941	320,332
Dilutive effect of stock options and other	924	787	989	854
Diluted average shares outstanding	319,391	321,226	319,930	321,186
Diluted net earnings per share	$ 2.13	$ 1	$ 3.23	$ 2.11

Earnings Per Share - Anti-dilut

Earnings Per Share - Anti-dilutive Stock Options (Detail) - $ / shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Earnings Per Share [Abstract]
Weighted-average shares	265	698	133	349
Weighted-average exercise price	$ 65.80	$ 59.07	$ 65.80	$ 59.07