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Basis of Interim Presentation - Schedule of Adjustments to Condensed Consolidated Statement of Earnings (Detail) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Oct. 01, 2016 | Sep. 30, 2017 | Oct. 01, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Cost of products sold | $ 4,591,153 | $ 3,608,000 | $ 13,111,226 | $ 10,669,103
Provision for income taxes | 104,500 | 152,807 | 442,239 | 318,388
Net earnings | 266,105 | 331,365 | 985,477 | 725,231
Earnings attributable to noncontrolling interests | 11,255 | 25,918 | 50,680 | 88,599
Net earnings attributable to Nucor stockholders | 254,850 | 305,447 | 934,797 | 636,632
Net earnings per share: |  |  |  |
Cost of products sold | 4,591,153 | 3,608,000 | 13,111,226 | 10,669,103
Provision for income taxes | 104,500 | 152,807 | 442,239 | 318,388
Net earnings | 266,105 | 331,365 | 985,477 | 725,231
Earnings attributable to noncontrolling interests | 11,255 | 25,918 | 50,680 | 88,599
Net earnings attributable to Nucor stockholders | $ 254,850 | $ 305,447 | $ 934,797 | $ 636,632
Basic | $ 0.79 | $ 0.95 | $ 2.91 | $ 1.99
Diluted | $ 0.79 | $ 0.95 | $ 2.90 | $ 1.99
As Originally Reported [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Cost of products sold |  | $ 3,665,900 |  | $ 10,774,040
Provision for income taxes |  | 131,788 |  | 281,401
Net earnings |  | 294,484 |  | 657,281
Earnings attributable to noncontrolling interests |  | 24,448 |  | 82,719
Net earnings attributable to Nucor stockholders |  | 270,036 |  | 574,562
Net earnings per share: |  |  |  |
Cost of products sold |  | 3,665,900 |  | 10,774,040
Provision for income taxes |  | 131,788 |  | 281,401
Net earnings |  | 294,484 |  | 657,281
Earnings attributable to noncontrolling interests |  | 24,448 |  | 82,719
Net earnings attributable to Nucor stockholders |  | $ 270,036 |  | $ 574,562
Basic |  | $ 0.84 |  | $ 1.79
Diluted |  | $ 0.84 |  | $ 1.79
Effect of Change [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Cost of products sold |  | $ (57,900) |  | $ (104,937)
Provision for income taxes |  | 21,019 |  | 36,987
Net earnings |  | 36,881 |  | 67,950
Earnings attributable to noncontrolling interests |  | 1,470 |  | 5,880
Net earnings attributable to Nucor stockholders |  | 35,411 |  | 62,070
Net earnings per share: |  |  |  |
Cost of products sold |  | (57,900) |  | (104,937)
Provision for income taxes |  | 21,019 |  | 36,987
Net earnings |  | 36,881 |  | 67,950
Earnings attributable to noncontrolling interests |  | 1,470 |  | 5,880
Net earnings attributable to Nucor stockholders |  | $ 35,411 |  | $ 62,070
Basic |  | $ 0.11 |  | $ 0.20
Diluted |  | $ 0.11 |  | $ 0.20

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