CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 185.7	$ 173.2
Accounts receivable, net	524.5	442.0
Inventory, net	1,105.8	1,113.9
Other current assets	107.7	94.6
Total current assets	1,923.7	1,823.7
Property, plant and equipment	6,585.4	6,569.0
Accumulated depreciation	(4,609.4)	(4,554.6)
Property, plant and equipment, net	1,976.0	2,014.4
Other non-current assets	204.7	197.9
TOTAL ASSETS	4,104.4	4,036.0
Current liabilities:
Accounts payable	651.5	589.9
Accrued liabilities	176.6	234.1
Current portion of long-term debt	168.5	0.0
Current portion of pension and other postretirement benefit obligations	41.3	41.3
Total current liabilities	1,037.9	865.3
Non-current liabilities:
Long-term debt	1,684.5	1,816.6
Pension and other postretirement benefit obligations	1,077.6	1,093.7
Other non-current liabilities	149.9	148.4
TOTAL LIABILITIES	3,949.9	3,924.0
EXCHANGEABLE NOTES EXCHANGE FEATURE	19.7	21.3
Equity:
Common stock, authorized 450,000,000 shares of $0.01 par value each; issued 315,663,417 and 314,739,500 shares in 2017 and 2016; outstanding 314,785,342 and 314,160,557 shares in 2017 and 2016	3.2	3.1
Additional paid-in capital	2,861.4	2,855.4
Treasury stock, common shares at cost, 878,075 and 578,943 shares in 2017 and 2016	(5.3)	(2.4)
Accumulated deficit	(3,002.3)	(3,064.8)
Accumulated other comprehensive loss	(86.2)	(63.5)
Total stockholders' equity (deficit)	(229.2)	(272.2)
Noncontrolling interests	364.0	362.9
TOTAL EQUITY	134.8	90.7
TOTAL LIABILITIES AND EQUITY	4,104.4	4,036.0
Variable Interest Entity, Primary Beneficiary [Member] | SunCoke Middletown [Member]
Current assets:
Cash and cash equivalents	10.1	5.0
Inventory, net	17.8	16.2
Property, plant and equipment	422.4	422.3
Accumulated depreciation	(76.6)	(72.5)
Other assets (liabilities), net	(0.7)	(2.3)
Current liabilities:
Accounts payable	10.9	7.8
Equity:
Noncontrolling interests	362.1	360.9
Variable Interest Entity, Primary Beneficiary [Member] | Other Variable Interest Entities [Member]
Current assets:
Cash and cash equivalents	0.8	0.8
Property, plant and equipment	11.8	11.8
Accumulated depreciation	(9.6)	(9.5)
Other assets (liabilities), net	0.9	1.0
Equity:
Noncontrolling interests	$ 1.9	$ 2.0