CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 113.0	$ 56.6
Accounts receivable, net	488.7	444.9
Inventory, net	1,068.9	1,226.3
Other current assets	71.8	78.4
Total current assets	1,742.4	1,806.2
Property, plant and equipment	6,488.4	6,466.0
Accumulated depreciation	(4,432.7)	(4,379.5)
Property, plant and equipment, net	2,055.7	2,086.5
Other non-current assets	189.2	191.7
TOTAL ASSETS	3,987.3	4,084.4
Current liabilities:
Accounts payable	643.3	703.4
Accrued liabilities	270.0	261.5
Current portion of pension and other postretirement benefit obligations	78.4	77.7
Total current liabilities	991.7	1,042.6
Non-current liabilities:
Long-term debt	2,336.4	2,354.1
Pension and other postretirement benefit obligations	1,132.4	1,146.9
Other non-current liabilities	138.4	136.4
TOTAL LIABILITIES	4,598.9	4,680.0
Equity (deficit):
Common stock, authorized 300,000,000 shares of $0.01 par value each; issued 178,924,901 and 178,284,137 shares in 2016 and 2015; outstanding 178,377,287 and 177,893,562 shares in 2016 and 2015	1.8	1.8
Additional paid-in capital	2,268.8	2,266.8
Treasury stock, common shares at cost, 547,914 and 390,575 shares in 2016 and 2015	(2.3)	(2.0)
Accumulated deficit	(3,070.6)	(3,057.0)
Accumulated other comprehensive loss	(188.2)	(187.2)
Total stockholders' equity (deficit)	(990.5)	(977.6)
Noncontrolling interests	378.9	382.0
TOTAL EQUITY (DEFICIT)	(611.6)	(595.6)
TOTAL LIABILITIES AND EQUITY (DEFICIT)	3,987.3	4,084.4
Variable Interest Entity, Primary Beneficiary [Member] | SunCoke Middletown [Member]
Current assets:
Cash and cash equivalents	7.0	7.6
Inventory, net	18.7	19.8
Property, plant and equipment	421.6	421.5
Accumulated depreciation	(61.2)	(57.6)
Other assets (liabilities), net	(0.7)	(0.5)
Current liabilities:
Accounts payable	8.5	10.8
Equity (deficit):
Noncontrolling interests	376.9	380.0
Variable Interest Entity, Primary Beneficiary [Member] | Other Variable Interest Entities [Member]
Current assets:
Cash and cash equivalents	1.0	1.1
Property, plant and equipment	11.6	11.5
Accumulated depreciation	(9.5)	(9.4)
Other assets (liabilities), net	1.0	0.9
Equity (deficit):
Noncontrolling interests	$ 2.0	$ 2.0