CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 1,214,652	$ 712,203	$ 2,322,006	$ 1,150,958
Other comprehensive income - net unrealized gain (loss) on cash flow hedging derivatives, net of income tax of ($4,465), $8,332, ($908), and $9,508 for the three and six-month periods ended June 30, 2022 and 2021, respectively	(14,295)	26,677	(2,908)	30,442
Comprehensive income	1,200,357	738,880	2,319,098	1,181,400
Comprehensive income attributable to noncontrolling interests	(5,098)	(9,912)	(8,521)	(18,160)
Comprehensive income attributable to Steel Dynamics, Inc.	$ 1,195,259	$ 728,968	$ 2,310,577	$ 1,163,240