CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 45.3	$ 227.0
Accounts receivable, net	525.2	473.9
Inventory, net	586.6	609.2
Deferred tax assets, current	69.6	73.2
Other current assets	46.5	59.4
Total current assets	1,273.2	1,442.7
Property, plant and equipment	5,871.9	5,943.9
Accumulated depreciation	(3,991.8)	(3,931.6)
Property, plant and equipment, net	1,880.1	2,012.3
Other non-current assets:
Investment in Magnetation LLC	187.8	150.0
Other non-current assets	264.6	298.1
TOTAL ASSETS	3,605.7	3,903.1
Current liabilities:
Accounts payable	601.8	538.3
Accrued liabilities	142.9	164.8
Current portion of long-term debt	0.8	0.7
Current portion of pension and other postretirement benefit obligations	85.9	108.6
Total current liabilities	831.4	812.4
Non-current liabilities:
Long-term debt	1,506.2	1,411.2
Pension and other postretirement benefit obligations	965.4	1,661.7
Other non-current liabilities	110.0	108.8
TOTAL LIABILITIES	3,413.0	3,994.1
Equity (deficit):
Common stock, authorized 200,000,000 shares of $.01 par value each; issued 149,691,388 and 149,094,571 shares in 2013 and 2012; outstanding 136,380,078 and 135,944,172 shares in 2013 and 2012	1.5	1.5
Additional paid-in capital	2,079.2	2,069.7
Treasury stock, common shares at cost, 13,311,310 and 13,150,399 shares in 2013 and 2012	(174.0)	(173.3)
Accumulated deficit	(2,451.1)	(2,404.3)
Accumulated other comprehensive income	323.4	1.1
Total stockholders' equity (deficit)	(221.0)	(505.3)
Noncontrolling interests	413.7	414.3
TOTAL EQUITY (DEFICIT)	192.7	(91.0)
TOTAL LIABILITIES AND EQUITY (DEFICIT)	3,605.7	3,903.1
Variable Interest Entity, Primary Beneficiary [Member] | SunCoke Middletown [Member]
Current assets:
Cash and cash equivalents	14.2	0
Accounts receivable, net	0	1.0
Inventory, net	22.1	28.3
Property, plant and equipment	418.5	414.5
Accumulated depreciation	(29.0)	(15.0)
Other assets (liabilities), net	(0.7)	(1.2)
Current liabilities:
Accounts payable	13.3	15.4
Equity (deficit):
Noncontrolling interests	411.8	412.2
Variable Interest Entity, Primary Beneficiary [Member] | Other Variable Interest Entities [Member]
Current assets:
Cash and cash equivalents	1.0	1.2
Property, plant and equipment	11.5	11.4
Accumulated depreciation	(9.2)	(8.9)
Other assets (liabilities), net	0.6	0.6
Equity (deficit):
Noncontrolling interests	$ 1.9	$ 2.1