Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenues
Sales and other operating revenue	$ 520.4	$ 516.8	$ 1,542.6	$ 1,458.5
Costs and operating expenses
Cost of products sold and operating expenses	436.1	413.4	1,281.2	1,163.2
Selling, general and administrative expenses	19.1	20.1	55.3	57.9
Depreciation and amortization expense	35.5	35.7	107.2	106.7
Total costs and operating expenses	490.7	469.2	1,443.7	1,327.8
Operating income	29.7	47.6	98.9	130.7
Interest expense, net	6.6	8.0	21.0	24.3
Income before income tax expense (benefit)	23.1	39.6	77.9	106.4
Income tax expense (benefit)	14.6	(2.9)	29.7	14.3
Net income	8.5	42.5	48.2	92.1
Less: Net income attributable to noncontrolling interests	1.5	1.1	4.5	3.2
Net income attributable to SunCoke Energy, Inc.	$ 7.0	$ 41.4	$ 43.7	$ 88.9
Earnings attributable to SunCoke Energy, Inc. per common share:
Basic (in dollars per share)	$ 0.08	$ 0.49	$ 0.52	$ 1.06
Diluted (in dollars per share)	$ 0.08	$ 0.49	$ 0.51	$ 1.05
Weighted average number of common shares outstanding:
Basic (in shares)	84.8	83.9	84.7	83.8
Diluted (in shares)	85.1	84.7	84.9	84.5