Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenues
Sales and other operating revenue	$ 490.1	$ 520.4	$ 1,449.4	$ 1,542.6
Costs and operating expenses
Cost of products sold and operating expenses	405.2	436.1	1,197.1	1,281.2
Selling, general and administrative expenses	9.6	19.1	45.8	55.3
Depreciation and amortization expense	28.1	35.5	90.1	107.2
Total costs and operating expenses	442.9	490.7	1,333.0	1,443.7
Operating income	47.2	29.7	116.4	98.9
Interest expense, net	5.7	6.6	17.8	21.0
Income before income tax expense	41.5	23.1	98.6	77.9
Income tax expense	8.2	14.6	20.9	29.7
Net income	33.3	8.5	77.7	48.2
Less: Net income attributable to noncontrolling interests	2.6	1.5	5.5	4.5
Net income attributable to SunCoke Energy, Inc.	$ 30.7	$ 7.0	$ 72.2	$ 43.7
Earnings attributable to SunCoke Energy, Inc. per common share:
Basic (in dollars per share)	$ 0.36	$ 0.08	$ 0.85	$ 0.52
Diluted (in dollars per share)	$ 0.36	$ 0.08	$ 0.85	$ 0.51
Weighted average number of common shares outstanding:
Basic (in shares)	85.1	84.8	85.1	84.7
Diluted (in shares)	85.3	85.1	85.3	84.9