Stock-Based Compensation (Tables)

9 Months Ended

Sep. 29, 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 nine months of 2018 is as follows (in thousands, except years and per share amounts):

				Weighted -		Weighted -
				Average		Average		Aggregate
				Exercise		Remaining		Intrinsic
	Shares			Price		Contractual Life		Value
Number of shares under stock options:
Outstanding at beginning of year		4,106		$	47.96
Granted		265		$	65.80
Exercised		(543	)	$	44.33			$	12,587
Canceled		—		$	—
Outstanding at September 29, 2018		3,828		$	49.71		6.7 years	$	53,223
Stock options exercisable at September 29, 2018		2,112		$	45.41		5.3 years	$	38,166

Summary of Nucor's RSU Activity

A summary of Nucor’s RSU activity for the first nine months of 2018 is as follows (shares in thousands):

				Grant Date
	Shares			Fair Value
RSUs:
Unvested at beginning of year		1,071		$	52.62
Granted		1,013		$	65.80
Vested		(799	)	$	59.23
Canceled		(11	)	$	55.02
Unvested at September 29, 2018		1,274		$	58.93

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

A summary of Nucor’s restricted stock activity under the AIP and the LTIP for the first nine months of 2018 is as follows (shares in thousands):

				Grant Date
	Shares			Fair Value
Restricted stock awards and RSUs:
Unvested at beginning of year		91		$	54.50
Granted		256		$	67.68
Vested		(217	)	$	64.95
Canceled		—		$	—
Unvested at September 29, 2018		130		$	62.97