Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents (Note 15)	$ 1,024,144	$ 1,483,252
Short-term investments (Notes 4 and 15)	100,000us-gaap_ShortTermInvestments	28,191us-gaap_ShortTermInvestments
Accounts receivable, net (Note 5)	2,068,298us-gaap_AccountsReceivableNetCurrent	1,810,987us-gaap_AccountsReceivableNetCurrent
Inventories, net (Note 6)	2,745,032us-gaap_InventoryNet	2,605,609us-gaap_InventoryNet
Other current assets (Notes 10, 14 and 20)	504,414us-gaap_OtherAssetsCurrent	482,007us-gaap_OtherAssetsCurrent
Total current assets	6,441,888us-gaap_AssetsCurrent	6,410,046us-gaap_AssetsCurrent
Property, plant and equipment, net (Note 7)	5,287,639us-gaap_PropertyPlantAndEquipmentNet	4,917,024us-gaap_PropertyPlantAndEquipmentNet
Goodwill (Note 9)	2,068,664us-gaap_Goodwill	1,973,608us-gaap_Goodwill
Other intangible assets, net (Note 9)	862,093us-gaap_FiniteLivedIntangibleAssetsNet	874,154us-gaap_FiniteLivedIntangibleAssetsNet
Other assets (Note 10)	955,643us-gaap_OtherAssetsNoncurrent	1,028,451us-gaap_OtherAssetsNoncurrent
Total assets	15,615,927us-gaap_Assets	15,203,283us-gaap_Assets
Current liabilities:
Short-term debt (Notes 12 and 15)	207,476us-gaap_ShortTermBorrowings	29,202us-gaap_ShortTermBorrowings
Long-term debt due within one year (Notes 12 and 15)	16,335us-gaap_LongTermDebtCurrent	3,300us-gaap_LongTermDebtCurrent
Accounts payable (Note 11)	993,872us-gaap_AccountsPayableCurrent	1,117,078us-gaap_AccountsPayableCurrent
Salaries, wages and related accruals (Note 18)	352,488	282,860
Accrued expenses and other current liabilities (Notes 11, 14, 16 and 20)	527,605us-gaap_AccruedLiabilitiesCurrent	527,776us-gaap_AccruedLiabilitiesCurrent
Total current liabilities	2,097,776us-gaap_LiabilitiesCurrent	1,960,216us-gaap_LiabilitiesCurrent
Long-term debt due after one year (Notes 12 and 15)	4,360,600us-gaap_LongTermDebtNoncurrent	4,376,900us-gaap_LongTermDebtNoncurrent
Deferred credits and other liabilities (Notes 14, 16, 18 and 20)	1,082,433	955,889
Total liabilities	7,540,809us-gaap_Liabilities	7,293,005us-gaap_Liabilities
Commitments and contingencies (Notes 14 and 16)
Nucor stockholders' equity (Notes 13 and 17):
Common stock (800,000 shares authorized; 378,092 and 377,525 shares issued, respectively)	151,237us-gaap_CommonStockValue	151,010us-gaap_CommonStockValue
Additional paid-in capital	1,883,356	1,843,353
Retained earnings	7,378,214	7,140,440
Accumulated other comprehensive (loss) income, net of income taxes (Notes 2, 14 and 21)	(145,708)	9,080
Treasury stock (59,059 and 59,197 shares, respectively)	(1,494,629)us-gaap_TreasuryStockValue	(1,498,114)us-gaap_TreasuryStockValue
Total Nucor stockholders' equity	7,772,470us-gaap_StockholdersEquity	7,645,769us-gaap_StockholdersEquity
Noncontrolling interests	302,648us-gaap_MinorityInterest	264,509us-gaap_MinorityInterest
Total equity	8,075,118	7,910,278
Total liabilities and equity	$ 15,615,927	$ 15,203,283

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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Investments which are intended to be sold in the short term (usually less than one year or the normal operating cycle, whichever is longer) including trading securities, available-for-sale securities, held-to-maturity securities, and other short-term investments not otherwise listed in the existing taxonomy.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

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The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.

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