Segments (Tables)

9 Months Ended

Sep. 30, 2017

Segment Reporting [Abstract]

Segments

Nucor’s results by segment for the third quarter and first nine months of 2017 and 2016 were as follows (in thousands):

	Three Months (13 Weeks) Ended						Nine Months (39 Weeks) Ended
	Sept. 30, 2017			Oct. 1, 2016			Sept. 30, 2017			Oct. 1, 2016
Net sales to external customers:
Steel mills	$	3,639,488		$	2,960,642		$	10,982,636		$	8,611,553
Steel products		1,089,519			1,011,602			2,919,992			2,763,335
Raw materials		441,110			317,992			1,257,437			876,696
	$	5,170,117		$	4,290,236		$	15,160,065		$	12,251,584
Intercompany sales:
Steel mills	$	767,268		$	567,854		$	2,189,123		$	1,592,512
Steel products		28,537			31,117			80,652			80,277
Raw materials		2,333,840			1,774,538			6,971,831			4,717,370
Corporate/eliminations		(3,129,645	)		(2,373,509	)		(9,241,606	)		(6,390,159	)
	$	—		$	—		$	—		$	—
Earnings (loss) before income taxes and noncontrolling interests:
Steel mills	$	432,718		$	591,799		$	1,734,245		$	1,402,898
Steel products		59,225			72,578			131,956			197,891
Raw materials		9,957			14,313			102,575			(76,240	)
Corporate/eliminations		(131,295	)		(194,518	)		(541,060	)		(480,930	)
	$	370,605		$	484,172		$	1,427,716		$	1,043,619
	Sept. 30, 2017			Dec. 31, 2016
Segment assets:
Steel mills	$	9,272,209		$	8,084,773
Steel products		2,893,703			2,544,344
Raw materials		3,462,340			3,235,237
Corporate/eliminations		875,582			1,359,164
	$	16,503,834		$	15,223,518