CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 44.5	$ 38.0
Accounts receivable, net	619.8	517.8
Inventory	1,334.0	1,385.0
Other current assets	96.4	130.3
Total current assets	2,094.7	2,071.1
Property, plant and equipment	6,850.7	6,831.8
Accumulated depreciation	(4,899.7)	(4,845.6)
Property, plant and equipment, net	1,951.0	1,986.2
Other non-current assets	412.0	417.5
TOTAL ASSETS	4,457.7	4,474.8
Current liabilities:
Accounts payable	728.6	690.4
Accrued liabilities	234.1	270.5
Current portion of pension and other postretirement benefit obligations	39.7	40.1
Total current liabilities	1,002.4	1,001.0
Non-current liabilities:
Long-term debt	2,103.3	2,110.1
Pension and other postretirement benefit obligations	869.2	894.2
Other non-current liabilities	150.9	168.9
TOTAL LIABILITIES	4,125.8	4,174.2
Equity:
Common stock, authorized 450,000,000 shares of $0.01 par value each; issued 316,330,695 and 315,782,764 shares in 2018 and 2017; outstanding 315,279,677 and 314,884,569 shares in 2018 and 2017	3.2	3.2
Additional paid-in capital	2,889.3	2,884.8
Treasury stock, common shares at cost, 1,051,018 and 898,195 shares in 2018 and 2017	(6.4)	(5.4)
Accumulated deficit	(2,849.1)	(2,877.0)
Accumulated other comprehensive loss	(56.1)	(50.2)
Total stockholders’ equity (deficit)	(19.1)	(44.6)
Noncontrolling interests	351.0	345.2
TOTAL EQUITY	331.9	300.6
TOTAL LIABILITIES AND EQUITY	4,457.7	4,474.8
SunCoke Middletown [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Current assets:
Cash and cash equivalents	10.6	0.1
Inventory	16.4	18.4
Property, plant and equipment	426.0	425.9
Accumulated depreciation	(92.4)	(88.6)
Current liabilities:
Accounts payable	12.8	11.3
Other assets (liabilities), net	1.7	(1.0)
Equity:
Noncontrolling interests	349.5	343.5
Other Variable Interest Entities [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Current assets:
Cash and cash equivalents	0.4	0.7
Property, plant and equipment	11.7	11.7
Accumulated depreciation	(9.7)	(9.6)
Current liabilities:
Other assets (liabilities), net	0.8	0.8
Equity:
Noncontrolling interests	$ 1.5	$ 1.7