CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 60.8	$ 45.3
Accounts receivable, net	707.6	525.2
Inventory, net	1,126.0	586.6
Deferred tax assets, current	74.7	69.6
Other current assets	76.3	46.5
Total current assets	2,045.4	1,273.2
Property, plant and equipment	6,335.9	5,871.9
Accumulated depreciation	(4,120.8)	(3,991.8)
Property, plant and equipment, net	2,215.1	1,880.1
Other non-current assets:
Investments in affilates	396.5	209.8
Other non-current assets	228.4	242.6
TOTAL ASSETS	4,885.4	3,605.7
Current liabilities:
Accounts payable	812.3	601.8
Accrued liabilities	281.7	142.9
Current portion of long-term debt	0.2	0.8
Current portion of pension and other postretirement benefit obligations	62.2	85.9
Total current liabilities	1,156.4	831.4
Non-current liabilities:
Long-term debt	2,406.4	1,506.2
Pension and other postretirement benefit obligations	832.4	965.4
Other non-current liabilities	124.4	110.0
TOTAL LIABILITIES	4,519.6	3,413.0
Exchangeable notes exchange feature	31.0	0
Equity:
Common stock, authorized 300,000,000 shares of $0.01 par value each; issued 177,216,956 and 149,691,388 shares in 2014 and 2013; outstanding 177,073,715 and 136,380,078 shares in 2014 and 2013	1.8	1.5
Additional paid-in capital	2,226.4	2,079.2
Treasury stock, common shares at cost, 143,241 and 13,311,310 shares in 2014 and 2013	(1.0)	(174.0)
Accumulated deficit	(2,561.5)	(2,451.1)
Accumulated other comprehensive income	249.4	323.4
Total stockholders' equity (deficit)	(84.9)	(221.0)
Noncontrolling interests	419.7	413.7
TOTAL EQUITY	334.8	192.7
TOTAL LIABILITIES AND EQUITY	4,885.4	3,605.7
Variable Interest Entity, Primary Beneficiary [Member] | SunCoke Middletown [Member]
Current assets:
Cash and cash equivalents	16.3	14.2
Inventory, net	30.6	22.1
Property, plant and equipment	419.5	418.5
Accumulated depreciation	(39.7)	(29.0)
Other assets (liabilities), net	(1.0)	(0.7)
Current liabilities:
Accounts payable	8.6	13.3
Equity:
Noncontrolling interests	417.9	411.8
Variable Interest Entity, Primary Beneficiary [Member] | Other Variable Interest Entities [Member]
Current assets:
Cash and cash equivalents	0.8	1.0
Property, plant and equipment	11.4	11.5
Accumulated depreciation	(9.2)	(9.2)
Other assets (liabilities), net	0.6	0.6
Equity:
Noncontrolling interests	$ 1.8	$ 1.9