CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED)
Net income	$ 431,690	$ 816,177	$ 1,019,190	$ 1,460,510
Other comprehensive income - net unrealized (loss) gain on cash flow hedging derivatives, net of income tax expense (benefit) of ($452) and ($247) for the three months ended, and ($590) and $44 for the six months ended June 30, 2024 and 2023, respectively	(1,415)	(773)	(1,849)	138
Comprehensive income	430,275	815,404	1,017,341	1,460,648
Comprehensive income attributable to noncontrolling interests	(3,692)	(4,070)	(7,151)	(11,093)
Comprehensive income attributable to Steel Dynamics, Inc.	$ 426,583	$ 811,334	$ 1,010,190	$ 1,449,555