Consolidated Statements of Equity - 3 months ended Mar. 31, 2016 - USD ($) $ in Millions	Total	Common Stock	Treasury Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Retained Earnings	Total SunCoke Energy, Inc. Equity	Noncontrolling Interests
Beginning balance, shares at Dec. 31, 2015		71,489,448	7,477,657
Beginning balance at Dec. 31, 2015	$ 622.8	$ 0.7	$ (140.7)	$ 486.1	$ (19.8)	$ (36.4)	$ 289.9	$ 332.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	12.6					(4.1)	(4.1)	16.7
Currency translation adjustment	0.4				0.4		0.4
Cash distribution to noncontrolling interests	(12.3)							(12.3)
Share-based compensation expense	1.7			1.7			1.7
Share issuances, net of shares withheld for taxes, shares		148,297
Share issuances, net of shares withheld for taxes	(0.5)			(0.5)			(0.5)
Ending balance, shares at Mar. 31, 2016		71,637,745.000000	7,477,657
Ending balance at Mar. 31, 2016	$ 624.7	$ 0.7	$ (140.7)	$ 487.3	$ (19.4)	$ (40.5)	$ 287.4	$ 337.3