SunCoke Energy (SXC) 10-K 24 Feb 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2014	Feb. 20, 2015	Jun. 30, 2014
Document and Entity Information [Abstract]
Entity Registrant Name	SunCoke Energy, Inc.
Entity Central Index Key	1514705
Current Fiscal Year End Date	-19
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Amendment Flag	FALSE
Entity Common Stock, Shares Outstanding		66,309,471
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$1,483,508,514

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues
Sales and other operating revenue	$1,461.50	$1,572.20	$1,853.70
Other income, net	11.2	13.3	11
Total revenues	1,472.70	1,585.50	1,864.70
Costs and operating expenses
Cost of products sold and operating expenses	1,174.10	1,282.50	1,573.10
Selling, general and administrative expenses	75.9	89.4	79
Depreciation and amortization expenses	96.1	77.1	65
Asset impairment	16.8	0	0
Total costs and operating expenses	1,362.90	1,449	1,717.10
Operating income	109.8	136.5	147.6
Interest expense, net	63.2	52.3	47.6
Income before income tax expense and loss from equity method investment	46.6	84.2	100
Income tax expense	7.4	16.4	18
Loss from equity method investment	35	2.2	0
Income from continuing operations	4.2	65.6	82
(Loss) income from discontinued operations, net of income tax benefit (expense) of $66.2 million, $9.7 million and ($5.3) million, respectively	-106	-15.5	20.5
Net (loss) income	-101.8	50.1	102.5
Less: Net income attributable to noncontrolling interests	24.3	25.1	3.7
Net (loss) income attributable to SunCoke Energy, Inc.	($126.10)	$25	$98.80
(Loss) earnings attributable to SunCoke Energy, Inc. per common share:
Basic, Continuing Operations (in dollar per share)	($0.29)	$0.58	$1.12
Basic, Discontinued Operations (in dollar per share)	($1.54)	($0.22)	$0.29
Diluted, Continuing Operations (in dollar per share)	($0.29)	$0.58	$1.11
Diluted, Discontinued Operations (in dollar per share)	($1.54)	($0.22)	$0.29
Weighted average number of common shares outstanding:
Basic (in shares)	68.8	69.9	70
Diluted (in shares)	68.8	70.2	70.3

Consolidated_Statements_of_Inc1

Consolidated Statements of Income Consolidated Statements of Income Parenthetical (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Tax expense (benefit) from income from discontinued operations	($66.20)	($9.70)	$5.30

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive (Loss) Income (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net (loss) income	($55.80)	$6.40	($48.40)	($4)	$18.70	$12.30	$12.70	$6.40	($101.80)	$50.10	$102.50
Other comprehensive (loss) income:
Reclassifications of prior service benefit and actuarial loss amortization to earnings (net of related tax benefit of $2.7 million, $1.3 million and $1.2 million, respectively)									-4	-1.9	-1.9
Retirement benefit plans funded status adjustment (net of related tax benefit (expense) of $1.6 million, ($3.8 million) and ($0.8 million), respectively)									-2.6	5.7	1.6
Currency translation adjustment									-0.8	-10	-1.1
Comprehensive (loss) income									-109.2	43.9	101.1
Less: Comprehensive income attributable to noncontrolling interests									24.3	25.1	3.7
Comprehensive (loss) income attributable to SunCoke Energy, Inc.									($133.50)	$18.80	$97.40

Consolidated_Statements_of_Com1

Consolidated Statements of Comprehensive (Loss) Income (Parenthetical) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net of related tax benefit, reclassifications of prior service benefit and actuarial loss amortization to earnings	$2.70	$1.30	$1.20
Retirement benefit plans funded status adjustment, tax	$1.60	($3.80)	($0.80)

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Assets
Cash and cash equivalents	$139	$233.60
Receivables	75.4	85.3
Inventories	139.1	128.6
Income tax receivable	6	6.6
Deferred income taxes	26.4	12.6
Other current assets	3.6	2.3
Current assets held for sale	19.3	12.9
Total current assets	408.8	481.9
Investment in Brazilian cokemaking operations	41	41
Equity method investment in VISA SunCoke Limited	22.3	56.8
Properties, plants and equipment, net	1,466.60	1,458.90
Goodwill and other intangible assets, net	22	23.5
Deferred charges and other assets	37.4	35.7
Long-term assets held for sale	0	146.1
Total assets	1,998.10	2,243.90
Liabilities and Equity
Accounts payable	110.9	138.4
Accrued liabilities	41.6	59.5
Short-term debt, including current portion of long-term debt	0	41
Interest payable	19.9	18.2
Current liabilities held for sale	37.4	25.9
Total current liabilities	209.8	283
Long-term debt	651.5	648.1
Accrual for black lung benefits	43.9	32.4
Retirement benefit liabilities	33.6	34.8
Deferred income taxes	321.9	354.7
Asset retirement obligations	15.1	10.9
Other deferred credits and liabilities	16.9	14.4
Long-term liabilities held for sale	0	33.3
Total liabilities	1,292.70	1,411.60
Equity
Preferred stock, $0.01 par value. Authorized 50,000,000 shares; no issued shares at December 31, 2014 and 2013	0	0
Common stock, $0.01 par value. Authorized 300,000,000 shares; issued 71,251,529 shares and 70,892,140 shares at December 31, 2014 and 2013, respectively	0.7	0.7
Treasury stock, 4,977,115 shares and 1,255,355 shares at December 31, 2014 and 2013 respectively	-105	-19.9
Additional paid-in capital	543.6	446.9
Accumulated other comprehensive loss	-21.5	-14.1
Retained earnings	13.9	143.8
Total SunCoke Energy, Inc. stockholders' equity	431.7	557.4
Noncontrolling interests	273.7	274.9
Total equity	705.4	832.3
Total liabilities and equity	$1,998.10	$2,243.90

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Jul. 23, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Preferred stock, par value	$0.01		$0.01
Preferred stock, shares authorized	50,000,000		50,000,000
Preferred stock, shares issued	0		0
Common stock, par value	$0.01	$0.01	$0.01
Common stock, shares authorized	300,000,000		300,000,000
Common stock, shares, issued	71,251,529		70,892,140
Treasury stock, shares	4,977,115		1,255,355

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash Flows from Continuing Operating Activities:
Net (loss) income	($101.80)	$50.10	$102.50
Adjustments to reconcile net (loss) income to net cash provided by continuing operating activities:
Loss (income) from discontinued operations, net of tax	106	15.5	-20.5
Asset impairment	16.8	0	0
Depreciation and amortization expense	96.1	77.1	65
Deferred income tax (benefit) expense	-6	0.5	30.4
Payments in excess of expense for retirement plans	-8.1	-5.4	-9.6
Share-based compensation expense	9.8	7.6	6.7
Excess tax benefit from share-based awards	-0.3	0	0
Loss from equity method investment	35	2.2	0
Loss on extinguishment/modification of debt	15.4	0	0
Changes in working capital pertaining to continuing operating activities (net of acquisitions):
Receivables	9.9	-17.1	-5.7
Inventories	-10.5	30.9	57.8
Accounts payable	-27.5	25.2	-69.2
Accrued liabilities	-17.9	-22.8	11
Interest payable	1.7	2.5	-0.2
Income taxes	1	-10.1	-17.6
Accrual for black lung benefits	11.5	-2.4	1.3
Other	-1.1	2.9	-7.9
Net cash provided by continuing operating activities	130	156.7	144
Cash Flows from Continuing Investing Activities:
Capital expenditures	-118.3	-132.3	-54.2
Acquisition of businesses, net of cash acquired	0	-113.3	0
Equity method investment in VISA SunCoke Limited	0	-67.7	0
Net cash used in continuing investing activities	-118.3	-313.3	-54.2
Cash Flows from Continuing Financing Activities:
Proceeds from issuance of common units of SunCoke Energy Partners, L.P., net of offering costs	90.5	237.8	0
Proceeds from issuance of long-term debt	268.1	150
Repayment of long-term debt	-276.5	-225	-3.3
Debt issuance costs	-5.8	-6.9	0
Proceeds from revolving facility	40	40	0
Repayment of revolving facility	-80	0	0
Cash distributions to noncontrolling interests	-32.3	-17.8	-2.3
Shares repurchased	-85.1	-10.9	-9.4
Proceeds from exercise of stock options	2.9	2.5	4.7
Excess tax benefit from share-based awards	0.3	0	0
Dividends paid	-3.8	0	0
Net cash (used in) provided by continuing financing activities	-81.7	169.7	-10.3
Net (decrease) increase in cash and cash equivalents from continuing operations	-70	13.1	79.5
Cash flows from discontinued operations - operating activities	-17.7	-5.4	62.1
Cash flows from discontinued operations - investing activities	-6.9	-13.3	-29.9
Net (decrease) increase in cash and cash equivalents from discontinued operations	-24.6	-18.7	32.2
Net (decrease) increase in cash and cash equivalents	-94.6	-5.6	111.7
Cash and cash equivalents at beginning of year	233.6	239.2	127.5
Cash and cash equivalents at end of year	$139	$233.60	$239.20

Consolidated_Statements_of_Equ

Consolidated Statements of Equity (USD $)	Total	Common Stock	Treasury Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Retained Earnings	Total SunCoke Energy, Inc. or Parent Equity	Noncontrolling Interests
In Millions, except Share data
Beginning balance at Dec. 31, 2011	$559.90	$0.70		$511.30	($6.50)	$20	$525.50	$34.40
Beginning balance, shares at Dec. 31, 2011		70,012,702
Net (loss) income	102.5					98.8	98.8	3.7
Reclassifications of prior service benefit and actuarial loss amortization to earnings	-1.9				-1.9		-1.9
Retirement benefit plans funded status adjustment (net of related tax benefit (expense) of $1.6 million, ($3.8 million) and ($0.8 million), respectively)	1.6				1.6		1.6
Currency translation adjustment	-1.1				-1.1		-1.1
Noncash distribution to Sunoco under Tax Sharing Agreement	-85.8			-85.8			-85.8
Share-based compensation expense	6.5			6.5			6.5
Cash distributions to noncontrolling interests	-2.3							-2.3
Stock issuances	4.9			4.9			4.9
Shares issuances, shares		548,737
Excess tax benefit from share-based awards	-9.4		-9.4				-9.4
Shares repurchased, shares		0	603,528
Ending balance at Dec. 31, 2012	574.9	0.7	-9.4	436.9	-7.9	118.8	539.1	35.8
Ending balance, shares at Dec. 31, 2012		70,561,439	603,528
Net (loss) income	50.1					25	25	25.1
Reclassifications of prior service benefit and actuarial loss amortization to earnings	-1.9				-1.9		-1.9
Retirement benefit plans funded status adjustment (net of related tax benefit (expense) of $1.6 million, ($3.8 million) and ($0.8 million), respectively)	5.7				5.7		5.7
Currency translation adjustment	-10				-10		-10
Net proceeds from issuance of SunCoke Energy Partners, L.P. units	231.8							231.8
Share-based compensation expense	7.6			7.6			7.6
Cash distributions to noncontrolling interests	-17.8							-17.8
Stock issuances	2.8			2.8			2.8
Shares issuances, shares		330,701
Excess tax benefit from share-based awards	-10.9		-10.5	-0.4			-10.9
Shares repurchased, shares		0	651,827
Ending balance at Dec. 31, 2013	832.3	0.7	-19.9	446.9	-14.1	143.8	557.4	274.9
Ending balance, shares at Dec. 31, 2013		70,892,140	1,255,355
Net (loss) income	-101.8					-126.1	-126.1	24.3
Reclassifications of prior service benefit and actuarial loss amortization to earnings	-4				-4		-4
Retirement benefit plans funded status adjustment (net of related tax benefit (expense) of $1.6 million, ($3.8 million) and ($0.8 million), respectively)	-2.6				-2.6		-2.6
Currency translation adjustment	-0.8				-0.8		-0.8
Net proceeds from issuance of SunCoke Energy Partners, L.P. units	90.5							90.5
Noncontrolling Interest, Increase from Business Combination	0			83.7			83.7	-83.7
Dividends paid	-3.8					-3.8	-3.8
Share-based compensation expense	9.8			9.8			9.8
Cash distributions to noncontrolling interests	-32.3							-32.3
Excess tax benefit from share-based awards	0.3			0.3			0.3
Stock issuances	2.9			2.9			2.9
Shares issuances, shares		359,389
Excess tax benefit from share-based awards	-85.1		-85.1				-85.1
Shares repurchased, shares			3,721,760
Ending balance at Dec. 31, 2014	$705.40	$0.70	($105)	$543.60	($21.50)	$13.90	$431.70	$273.70
Ending balance, shares at Dec. 31, 2014		71,251,529	4,977,115

Consolidated_Statements_of_Equ1

Consolidated Statements of Equity (Parenthetical) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Stockholders' Equity [Abstract]
Net of related tax benefit, reclassifications of prior service benefit and actuarial loss amortization to earnings	$2.70	$1.30	$1.20
Retirement benefit plans funded status adjustment, tax	($1.60)	$3.80	$0.80

General_and_Basis_of_Presentat

General and Basis of Presentation	12 Months Ended
	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
General and Basis of Presentation	1. General and Basis of Presentation
	Description of Business
	SunCoke Energy, Inc. (“SunCoke Energy”, “Company”, “we”, “our” and “us”) is the largest independent producer of high-quality coke in the Americas, as measured by tons of coke produced each year, and has more than 50 years of coke production experience. Coke is a principal raw material in the blast furnace steelmaking process. Coke is generally produced by heating metallurgical coal in a refractory oven, which releases certain volatile components from the coal, thus transforming the coal into coke.
	We have designed, developed, built, own and operate five cokemaking facilities in the United States (“U.S.”) with collective nameplate capacity to produce approximately 4.2 million tons of coke per year. Additionally, we have designed and operate one cokemaking facility in Brazil under licensing and operating agreements on behalf of our customer. We have a preferred stock investment in the project company that owns this facility, which has approximately 1.7 million tons of annual cokemaking capacity. In March 2013, we formed a cokemaking joint venture with VISA Steel Limited ("VISA Steel") in India called VISA SunCoke Limited ("VISA SunCoke"), which has cokemaking capacity of 440 thousand tons of coke per year.
	Our cokemaking ovens utilize efficient, modern heat recovery technology designed to combust the coal’s volatile components liberated during the cokemaking process and use the resulting heat to create steam or electricity for sale. This differs from by-product cokemaking which repurposes the coal’s liberated volatile components for other uses. We have constructed the only greenfield cokemaking facilities in the U.S. in the last 25 years and are the only North American coke producer that utilizes heat recovery technology in the cokemaking process. We believe that heat recovery technology has several advantages over the alternative by-product cokemaking process, including producing higher quality coke, using waste heat to generate steam or electricity for sale and reducing the environmental impact.
	Our Granite City facility, the first phase of our Haverhill facility, or Haverhill 1, and our VISA SunCoke joint venture have steam generation facilities which use hot flue gas from the cokemaking process to produce steam for sale to customers pursuant to steam supply and purchase agreements. Granite City and Haverhill 1 sell steam to third-parties and VISA SunCoke sells steam to VISA Steel. Our Middletown facility and the second phase of our Haverhill facility, or Haverhill 2, have cogeneration plants that use the hot flue gas created by the cokemaking process to generate electricity, which is either sold into the regional power market or to AK Steel pursuant to energy sales agreements.
	We own and operate coal mining operations in Virginia and West Virginia with more than 110 million tons of proven and probable reserves at December 31, 2014. In 2014, we sold approximately 1.5 million tons of metallurgical coal (including internal sales to our cokemaking operations) and 0.1 million tons of thermal coal. We are pursuing the exit of our coal mining business and have presented the results of our coal operations as discontinued operations and held for sale in the consolidated financial statements.
	We also provide coal handling and blending services with our Coal Logistics business. Our terminal located in East Chicago, Indiana, SunCoke Lake Terminal, LLC ("Lake Terminal") provides coal handling and blending services to SunCoke's Indiana Harbor cokemaking operations. Kanawha River Terminals ("KRT") is a leading metallurgical and thermal coal blending and handling terminal service provider with collective capacity to blend and transload 30 million tons of coal annually through operations in West Virginia and Kentucky. Coal is transported from the mine site in numerous ways, including rail, truck, barge or ship. Our coal terminals act as intermediaries between coal producers and coal end users by providing transloading, storage and blending services. We do not take possession of coal in our Coal Logistics business, but instead earn revenue by providing coal handling and blending services to our customers on a fee per ton basis. We provide blending and handling services to steel, coke (including some of our domestic cokemaking facilities), electric utility and coal producing customers.
	On January 17, 2012 (the “Distribution Date”), we became an independent, publicly-traded company following our separation from Sunoco, Inc. (“Sunoco”). Our separation from Sunoco occurred in two steps:
	•	We were formed as a wholly-owned subsidiary of Sunoco. On July 18, 2011 (the “Separation Date”), Sunoco contributed the subsidiaries, assets and liabilities that were primarily related to its cokemaking and coal mining operations to us in exchange for shares of our common stock. As of such date, Sunoco owned 100 percent of our common stock. On July 26, 2011, we completed an initial public offering (“IPO”) of 13,340,000 shares of our common stock, or 19.1 percent of our outstanding common stock. Following the IPO, Sunoco continued to own 56,660,000 shares of our common stock, or 80.9 percent of our outstanding common stock.
	•	On the Distribution Date, Sunoco made a pro-rata, tax free distribution (the “Distribution”) of the remaining shares of our common stock that it owned in the form of a special stock dividend to Sunoco shareholders. Sunoco shareholders received 0.53046456 of a share of common stock for every share of Sunoco common stock held as of the close of business on January 5, 2012, the record date for the Distribution. After the Distribution, Sunoco ceased to own any shares of our common stock.
	On January 24, 2013, we completed the initial public offering of SunCoke Energy Partners, L.P., a master limited partnership (“the Partnership”), through the sale of 13,500,000 common units representing limited partner interests in the Partnership in exchange for $231.8 million of net proceeds, net of $24.7 million of offering costs, $6.0 million of which were paid during 2012 (the "Partnership offering"). Of these net proceeds, $67.0 million was retained by the Partnership for environmental remediation project expenditures and $12.4 million for sales discounts related to tax credits owed to our customers. Upon the closing of the Partnership offering, we owned the general partner of the Partnership, which consists of a 2.0 percent ownership interest and incentive distribution rights, and a 55.9 percent limited partner interest in the Partnership. The remaining 42.1 percent interest in the Partnership was held by public unitholders and was reflected in noncontrolling interest on our Consolidated Statement of Operations and Consolidated Balance Sheet beginning with the first quarter of 2013. Key assets of the Partnership at the time of formation were a 65 percent interest in each of our Haverhill and Middletown cokemaking and heat recover facilities.
	On May 9, 2014, SunCoke Energy contributed an additional 33 percent interest in the Haverhill and Middletown cokemaking facilities to the Partnership, resulting in a decrease in our limited partner ownership in the Partnership to 54.1 percent and increased public unitholders' limited interest to 43.9 percent interest in the Partnership. See Note 4. At December 31, 2014, we own the general partner of the Partnership, which consists of a 2.0 percent ownership interest and incentive distribution rights, and a 54.0 percent limited partner interest in the Partnership. The remaining 44.0 percent interest in the Partnership was held by public unitholders and is reflected in noncontrolling interest on our Consolidated Statement of Operations and Consolidated Balance Sheet.
	We are also party to an omnibus agreement pursuant to which we will provide the Partnership with: (1) remarketing efforts upon the occurrence of certain potential adverse events under our coke sales agreements; (2) indemnification of certain environmental costs; and (3) preferential rights for growth opportunities.
	Consolidation and Basis of Presentation
	The consolidated financial statements of the Company and its subsidiaries were prepared in accordance with accounting principles generally accepted in the U.S. ("GAAP") and include the assets, liabilities, revenues and expenses of the Company and all subsidiaries where we have a controlling financial interest. Intercompany transactions and balances have been eliminated in consolidation.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies
	Use of Estimates
	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual amounts could differ from these estimates.
	Reclassifications
	Certain amounts in the prior period consolidated financial statements have been reclassified to conform to the current year presentation.
	Currency Translation
	The functional currency of the Company’s Brazilian operations and India joint venture are the Brazilian real and Indian rupee, respectively. The Company’s foreign operations translate their assets and liabilities into U.S. dollars at the current exchange rates in effect at the end of the fiscal period. The gains or losses that result from this process are shown as cumulative translation adjustments within accumulated other comprehensive loss in the Consolidated Balance Sheets. The revenue and expense accounts of foreign operations are translated into U.S. dollars at the average exchange rates that prevailed during the period.
	Some transactions of the Company’s Brazilian operations and India joint venture are conducted in currencies different from their functional currency. Gains and losses from these foreign currency transactions are included in income as they occur. Our share of equity method losses in India resulting from foreign currency transactions was $0.3 million and $1.5 million for the year ended December 31, 2014 and 2013, respectively. The gains and losses from our Brazilian operations were not material to the results of operations during the years ended December 31, 2014, 2013 and 2012.
	Revenue Recognition
	The Company sells metallurgical coal and coke as well as steam and electricity and also provides coal blending and handling services to third-party customers. The Company also receives fees for operating the cokemaking plant in Brazil and for the licensing of its proprietary technology for use at this facility as well as reimbursement of substantially all of its operating costs. Revenues related to the sale of products are recognized when title passes, while service revenues are recognized when services are provided as defined by customer contracts. Licensing fees, which are determined on a per ton basis, are recognized when coke is produced in accordance with the contract terms. Title passage generally occurs when products are shipped or delivered in accordance with the terms of the respective sales agreements. Revenues are not recognized until sales prices are fixed or determinable and collectability is reasonably assured.
	Substantially all of the coke produced by the Company is sold pursuant to long-term contracts with its customers. The Company evaluates each of its contracts to determine whether the arrangement contains a lease under the applicable accounting standards. If the specific facts and circumstances indicate that it is remote that parties other than the contracted customer will take more than a minor amount of the coke that will be produced by the property, plant and equipment during the term of the coke supply agreement, and the price that the customer is paying for the coke is neither contractually fixed per unit nor equal to the current market price per unit at the time of delivery, then the long-term contract is deemed to contain a lease. The lease component of the price of coke represents the rental payment for the use of the property, plant and equipment, and all such payments are accounted for as contingent rentals as they are only earned by the Company when the coke is delivered and title passes to the customer. The total amount of revenue recognized by the Company for these contingent rentals represents less than 10 percent of combined sales and other operating revenues for each of the years ended December 31, 2014, 2013 and 2012.
	Cash Equivalents
	The Company considers all highly liquid investments with a remaining maturity of three months or less at the time of purchase to be cash equivalents. These cash equivalents consist principally of time deposits and money market investments.
	Inventories
	Inventories are valued at the lower of cost or market. Cost is determined using the first-in, first-out method, except for the Company’s materials and supplies inventory, which are determined using the average-cost method.
	The Company utilizes the selling prices under its long-term coke supply contracts to record lower of cost or market inventory adjustments.
	Properties, Plants and Equipment
	Plants and equipment are depreciated on a straight-line basis over their estimated useful lives. Coke and energy plant, machinery and equipment are depreciated over 25 to 30 years. Coal logistics plant and equipment are depreciated over 15 to 20 years. All depreciation and amortization is excluded from cost of products sold and operating expenses and presented separately on the Consolidated Statements of Operations. Gains and losses on the disposal or retirement of fixed assets are reflected in earnings when the assets are sold or retired. Amounts incurred that extend an asset’s useful life, increase its productivity or add production capacity are capitalized. The Company had capitalized interest costs related to its environmental remediation project (see Note 17) of $3.2 million, $1.0 million and $0.1 million for 2014, 2013 and 2012, respectively. Direct costs, such as outside labor, materials, internal payroll and benefits costs, incurred during the construction of a new facility are capitalized; indirect costs are not capitalized. Normal repairs and maintenance costs are expensed as incurred.
	We revised the estimated useful lives of certain assets to be retired at our Indiana Harbor cokemaking facility and recorded additional depreciation of $15.6 million, $9.5 million and $2.2 million, or $0.23, $0.14 and $0.03 per common share from continuing operations, during 2014, 2013 and 2012, respectively. Additionally in 2015, the Company plans to demolish the coal preparation plant located near our Jewell cokemaking facility and has revised the estimated useful lives of certain coal preparation plant assets which resulted in additional depreciation of $1.0 million, or $0.01 per common share from continuing operations, during 2014.
	Impairment of Long-Lived Assets
	Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the assets may not be recoverable. Such events and circumstances include, among other factors: operating losses; unused capacity; market value declines; changes in the expected physical life of an asset; technological developments resulting in obsolescence; changes in demand for our products or in end-use goods manufactured by others utilizing our products as raw materials; changes in our business plans or those of our major customers, suppliers or other business partners; changes in competition and competitive practices; uncertainties associated with the U.S. and world economies; changes in the expected level of capital, operating or environmental remediation project expenditures; and changes in governmental regulations or actions.
	A long-lived asset, or group of assets, is considered to be impaired when the undiscounted net cash flows expected to be generated by the asset are less than its carrying amount. Such estimated future cash flows are highly subjective and are based on numerous assumptions about future operations and market conditions. The impairment recognized is the amount by which the carrying amount exceeds the fair market value of the impaired asset, or group of assets. It is also difficult to precisely estimate fair market value because quoted market prices for our long-lived assets may not be readily available. Therefore, fair market value is generally based on the present values of estimated future cash flows using discount rates commensurate with the risks associated with the assets being reviewed for impairment. The Company recorded impairment charges in 2014 on certain long-lived assets, which are discussed in Note 3 and Note 24.
	Assets held for sale are measured at the lower of their carrying values or fair value less costs to sell.
	Goodwill and Other Intangibles
	Goodwill, which represents the excess of the purchase price over the fair value of net assets acquired, is tested for impairment at least annually during the fourth quarter. Other than the goodwill impairment recorded on our discontinued operations (see Note 24), there were no other impairment of goodwill or other intangibles during the periods presented. All other intangible assets have finite useful lives and are amortized over their useful lives in a manner that reflects the pattern in which the economic benefit of the intangible asset is consumed. See Note 12.
	Investment in Brazilian Cokemaking Operations
	SunCoke Energy’s investment in preferred shares of the company that owns the cokemaking facility in Vitória, Brazil, that SunCoke Energy operates under licensing and operating agreements, is accounted for at cost. Income received by SunCoke Energy from this investment, which is in the form of a dividend, is contingent upon achieving certain minimum production levels at the facility and payment is guaranteed by the parent company of the plant’s owner, which is a lessee of the facility. Accordingly, the Company recognizes income from this investment in other income on the Consolidated Statement of Operations when certain required production levels have been met and the amount is deemed collectible, typically in the fourth quarter.
	Derivative Financial Instruments
	The Company utilizes derivative financial instruments to hedge against the risk of adverse movements in interest rates and foreign currency fluctuations. Our corporate policy prohibits the use of derivative instruments for trading or speculative purposes, and we have procedures in place to monitor and control their use. See Note 24.
	Cash received or paid upon settlement of derivative financial instruments is classified in the same category as the cash flows from items being hedged on the Consolidated Statements of Cash Flows.
	Income Taxes
	Deferred tax asset and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those differences are projected to be recovered or settled.
	The Company recognizes uncertain tax positions in its financial statements when minimum recognition threshold and measurement attributes are met in accordance with current accounting guidance. Unrecognized tax benefits and accruals for interest and penalties are included in other deferred credits and liabilities on the Consolidated Balance Sheets. The Company recognizes interest related to unrecognized tax benefits in interest expense and penalties in income tax expense on the Consolidated Statements of Operations.
	Retirement Benefit Liabilities
	The funded status of defined benefit and postretirement benefit plans is fully recognized on the Consolidated Balance Sheets. It is determined by the difference between the fair value of plan assets and the benefit obligation, with the benefit obligation represented by the projected benefit obligation for defined benefit plans and the accumulated postretirement benefit obligation for postretirement benefit plans. Actuarial gains (losses) and prior service (benefits) costs which have not yet been recognized in net income are recognized as a credit (charge) to accumulated other comprehensive loss. The credit (charge) to accumulated other comprehensive loss, which is reflected net of related tax effects, is subsequently recognized in net income when amortized as a component of defined benefit plans and postretirement benefit plans expense. In addition, the credit (charge) may also be recognized in net income as a result of a plan curtailment or settlement.
	Asset Retirement Obligations
	The fair value of a liability for an asset retirement obligation is recognized in the period in which it is incurred if a reasonable estimate of fair value can be made. The associated asset retirement costs are capitalized as part of the carrying amount of the asset and depreciated over its remaining estimated useful life. The Company’s asset retirement obligations primarily relate to costs associated with restoring land to its original state.
	Shipping and Handling Costs
	Shipping and handling costs are included in cost of products sold and operating expenses.
	Share-based Compensation
	We measure the cost of employee services in exchange for an award of equity instruments based on the grant-date fair value of the award. The total cost is reduced by estimated forfeitures over the awards’ vesting period and the cost is recognized over the requisite service period. Forfeiture estimates are reviewed on an annual basis.
	Fair Value Measurements
	The Company determines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. As required, the Company utilizes valuation techniques that maximize the use of observable inputs (levels 1 and 2) and minimize the use of unobservable inputs (level 3) within the fair value hierarchy included in current accounting guidance. The Company generally applies the “market approach” to determine fair value. This method uses pricing and other information generated by market transactions for identical or comparable assets and liabilities. Assets and liabilities are classified within the fair value hierarchy based on the lowest level (least observable) input that is significant to the measurement in its entirety.
	Recently Issued Pronouncements
	In January 2015, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update (“ASU”) 2015-01, "Income Statement—Extraordinary and Unusual Items (Subtopic 225-20): Simplifying Income Statement Presentation by Eliminating the Concept of Extraordinary Items". ASU 2015-01 eliminates the concept of extraordinary items from GAAP. It is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015, with early adoption permitted. The Company does not expect this ASU to have a material effect on the Company's financial condition, results of operations, or cash flows.
	In November 2014, the FASB issued ASU 2014-16, "Derivatives and Hedging (Topic 815): Determining Whether the Host Contract in a Hybrid Financial Instrument Issued in the Form of a Share is More Akin to Debt or to Equity". ASU 2014-16 provides guidance to entities about how to determine the nature of the host contract by considering all terms and features of the hybrid financial instrument. It is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015, with early adoption permitted. The Company does not expect this ASU to have a material effect on the Company's financial condition, results of operations, or cash flows.
	In November 2014, the FASB issued ASU 2014-17, "Business Combinations (Topic 805): Pushdown Accounting". ASU 2014-17 provides guidance on whether and at what threshold an acquired entity can apply pushdown accounting in its separate financial statements. It is effective on November 18, 2014. The Company does not expect this ASU to have a material effect on the Company's financial condition, results of operations, or cash flows.
	In August 2014, the FASB issued ASU 2014-15, "Presentation of Financial Statements-Going Concern". This ASU is intended to define management's responsibility to evaluate whether there is substantial doubt about an organization's ability to continue as a going concern and to provide related footnote disclosures. It is effective for annual periods beginning after December 15, 2016, with early adoption permitted. The Company does not expect this ASU to have a material effect on the Company's financial condition, results of operations, and cash flows.
	In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers,” which provides guidance for revenue recognition. Under this ASU, an entity is required to recognize revenue upon transfer of promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services.  The guidance also requires additional disclosure about the nature, amount, timing, and uncertainty of revenue and cash flows arising from the customer contracts, including significant judgments and changes in judgments and assets recognized from costs incurred to obtain or fulfill a contract. This ASU is effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. The Company is currently reviewing the provisions of ASU 2014-09 but does not expect it to have a material effect on the Company's financial condition, results of operations, and cash flows.
	In April 2014, the FASB issued ASU 2014-08, “Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity." ASU 2014-08 raises the threshold for a disposal to qualify as a discontinued operation and requires new disclosures of both discontinued operations and certain other disposals that do not meet the definition of a discontinued operation. This ASU is effective for annual periods beginning on or after December 15, 2014 with early adoption permitted. The application of this guidance is prospective from the date of adoption and applies only to disposals (or new classifications to held for sale) that have not been reported as discontinued operations in previously issued financial statements. The Company early adopted this ASU during the third quarter of 2014.
	Labor Concentrations
	As of December 31, 2014, we have approximately 1,202 employees in the U.S. Approximately 26 percent of our domestic employees, principally at our cokemaking operations, are represented by the United Steelworkers under various contracts. Additionally, approximately 2 percent of our domestic employees are represented by the International Union of Operating Engineers. On August 16, 2014, we reached a new three year labor agreement for our Granite City location, which will expire on August 31, 2017. The labor agreements at our Indiana Harbor and Haverhill cokemaking facilities expire on August 31, 2015 and October 31, 2015, respectively. As of December 31, 2014, we have approximately 278 employees at the cokemaking facility in Vitória, Brazil, all of whom are represented by a union under an agreement that expires on October 31, 2015. We will be working on the renewal of these agreements in 2015 and do not anticipate any work stoppages.

Coal_Impairment_Charges_and_Di

Coal Impairment Charges and Discontinued Operations	12 Months Ended
	Dec. 31, 2014
Discontinued Operations and Disposal Groups [Abstract]
Coal Impairment Charges and Discontinued Operations	3. Coal Impairment Charges and Discontinued Operations
	On July 17, 2014, the Company's Board of Directors authorized the Company to sell and/or otherwise dispose of the Company’s coal mining business.  Concurrent with this authorization, the coal mining operations were, and continue to be, reflected as discontinued operations and the related net assets are presented as held for sale in the Company’s consolidated financial statements. The coal mining net assets and results of operations for all periods presented have been reclassified to reflect discontinued operations and held for sale presentation. The Company's coal mining business was previously reported as the Coal Mining reportable segment.
	Certain coal mining assets (i.e. coal preparation plant) and liabilities (i.e. black lung, workers' compensation, certain asset retirement obligations and net pension and other postretirement employee benefit obligations) are expected to be retained by the Company and are not part of the disposal group, and therefore, are reported in continuing operations in Corporate and Other.  Legacy assets totaled $12.9 million and $30.5 million and legacy liabilities totaled $86.9 million and $68.6 million at December 31, 2014 and 2013, respectively. Legacy costs of $17.1 million, $0.4 million and $3.9 million are included in continuing operations for the years ended December 31, 2014, 2013 and 2012, respectively. The current year period included $14.3 million of charges related to black lung obligations as discussed in Note 16.
	During 2014, the Company recorded total impairment charges related to the coal business of $150.3 million, including both long-lived asset and goodwill impairment charges as well as valuation impairment charges on the disposal group, which is stated at fair value less costs to sell. Of these total charges, $133.5 million, or $81.9 million, net of tax, was related to the disposal group and was recorded in loss from discontinued operations, net of tax. The remaining $16.8 million related to the coal preparation plant, which is considered a legacy asset, and was recorded in asset impairment on the Consolidated Statement of Operations. See Note 24 for further discussion of fair value measurements.
	We have been actively marketing the sale of the coal mining business but believe the increasingly difficult coal pricing environment impeded the sale of the entire coal business in 2014, although we did execute a definitive agreement to sell the Harold Keene Coal Companies (“HKCC”) in the fourth quarter of 2014. We will continue to pursue the sale of the remaining coal mining business in 2015, and upon a successful sale, the Company would likely enter into a long-term coal supply agreement with the buyer. To help minimize losses, while still providing a cost effective and reliable supply of coal to our Jewell cokemaking facility, we implemented a coal rationalization plan in December 2014. Under the coal rationalization plan, we will source a portion of the coal from external coal suppliers and will implement a contract mining model, which will use contract miners to mine our coal reserves. As part of this coal rationalization plan, we will idle various mines and reduce production by approximately 50 percent, transition coal washing activities to a third party provider and eliminate nearly 400 coal mining positions. The Company has recorded $12.5 million in employee-related costs and $6.0 million in contract termination costs in 2014 associated with these actions and expects to incur additional exit and disposal costs of $1.5 million to $4.5 million in 2015 associated with employee severance, contract termination and other one time costs to idle mines.
	Summarized below is the major financial information of our coal business presented as held for sale on our Consolidated Balance Sheets:
		December 31,
		2014			2013
		(Dollars in millions)
	Assets
	Receivables	$	2.8		$	6.2
	Inventories	8.8			6.7
	Properties, plants and equipment, net	31.1			—
	Lease and mineral rights, net	18.6			—
	Other current assets	3.5			—
	Valuation allowance	(45.5		)	—
	Total current assets held for sale	19.3			12.9
	Properties, plants and equipment, net	—			85.2
	Lease and mineral rights, net	—			52.8
	Goodwill and other intangible assets, net	—			6
	Other assets	—			2.1
	Total assets held for sale	$	19.3		$	159
	Liabilities
	Accounts payable	$	10.4		$	15.9
	Accrued liabilities	19.9			10
	Asset retirement obligations	7.1			—
	Total current liabilities held for sale	37.4			25.9
	Deferred income taxes	—			21.9
	Asset retirement obligations	—			7
	Other deferred credits and liabilities	—			4.4
	Total liabilities held for sale	$	37.4		$	59.2
	Summarized below is the major financial information of our coal business presented as discontinued operations in our Consolidated Statements of Operations:
		Years Ended December 31,
		2014			2013			2012
		(Dollars in millions)
	Revenues
	Total revenues	$	31.1		$	62.2		$	49.4
	Costs and operating expenses
	Cost of products sold and operating expenses	38.8			65.5			4.5
	Selling, general and administrative expenses	20.8			3			3.1
	Depreciation, depletion and amortization	10.2			18.9			16
	Asset and goodwill impairment	133.5			—			—
	Pre-tax (loss) income from discontinued operations	(172.2		)	(25.2		)	25.8
	Income tax benefit (expense)	66.2			9.7			(5.3		)
	(Loss) income from discontinued operations, net of tax	$	(106.0	)	$	(15.5	)	$	20.5

DropDown_Transaction

Drop-Down Transaction	12 Months Ended
	Dec. 31, 2014
Business Combinations [Abstract]
Drop-Down Transaction	4. Drop-Down Transaction
	On May 9, 2014, SunCoke Energy contributed an additional 33 percent interest in the Haverhill and Middletown cokemaking facilities to the Partnership for a total transaction value of $365.0 million (the "Haverhill and Middletown Dropdown"). After the Haverhill and Middletown Dropdown, SunCoke Energy continued to own a 2.0 percent general partner interest in the Partnership, all of the incentive distribution rights, and a 54.1 percent limited partner interest in the Partnership, a decrease from the 55.9 percent interest held at December 31, 2013. Upon the closing of the Haverhill and Middletown Dropdown transaction, public unitholders held a 43.9 percent interest in the Partnership, which is reflected as a noncontrolling interest in the consolidated financial statements. We accounted for the Haverhill and Middletown Dropdown as an equity transaction, which resulted in a decrease in noncontrolling interest and an increase in SunCoke's equity of $83.7 million.
	Total value received by SunCoke Energy for the Haverhill and Middletown Dropdown included 2.7 million common units totaling $80.0 million and $3.3 million of general partner interests. In addition, the Partnership assumed and repaid approximately $271.3 million of our outstanding debt and other liabilities, including paying a market premium of $11.4 million to complete the tender of the senior unsecured notes. The remaining $10.4 million of transaction value consisted of $3.4 million in cash as well as $7.0 million retained by the Partnership to pre-fund our obligation to the Partnership for the anticipated cost of the environmental remediation project at Haverhill.
	In conjunction with the Haverhill and Middletown Dropdown, the Partnership closed on the issuance of 3.2 million common units to the public for $88.7 million of net proceeds, completed on April 30, 2014, and received approximately $263.1 million of gross proceeds from the issuance of $250.0 million aggregate principal amount of 7.375 percent senior notes due 2020 through a private placement on May 9, 2014. In addition, the Partnership received $5.0 million to fund interest from February 1, 2014 to May 9, 2014, the period prior to the issuance. This interest was paid to noteholders on August 1, 2014. See Note 15.
	The table below summarizes the effects of the changes in the Company’s ownership interest in Haverhill and Middletown on SunCoke’s equity.
		Year Ended December 31, 2014
		(Dollars in millions)
	Net loss attributable to SunCoke Energy, Inc.	$	(126.1	)
	Transfer from noncontrolling interest from change in SunCoke Energy, Inc. equity for the contribution of 33.0 percent interest in Haverhill and Middletown	83.7
	Change from net loss attributable to SunCoke Energy, Inc. and transfers from noncontrolling interest	$	(42.4	)
	5. Acquisitions
	SunCoke Lake Terminal LLC
	On August 30, 2013, the Partnership completed its acquisition of the assets and business operations of Lakeshore Coal Handling Corporation ("Lakeshore"), now called SunCoke Lake Terminal LLC ("Lake Terminal") for $28.6 million. Prior to the acquisition, the entity that owns SunCoke's Indiana Harbor cokemaking operations was a customer of Lakeshore and held the purchase rights to Lakeshore. Concurrent with the closing of the transaction, the Partnership paid $1.8 million to DTE Energy Company, the third party investor owning a 15 percent interest in the entity that owns Indiana Harbor, in consideration for assigning its share of the Lake Terminal buyout rights to the Partnership. The Partnership recognized this payment in selling, general, and administrative expenses on the Consolidated Statement of Operations during the period.
	Located in East Chicago, Indiana, Lake Terminal does not take possession of coal but instead derives its revenue by providing coal handling and blending services to its customers on a per ton basis. Lake Terminal has and will continue to provide coal handling and blending services to SunCoke's Indiana Harbor cokemaking operations. In September 2013, Lake Terminal and Indiana Harbor entered into a new 10-year contract with terms equivalent to those of an arm's-length transaction.
	The following table summarizes the consideration paid for Lake Terminal and the fair value of the assets acquired at the acquisition date (dollars in millions):
	Consideration:
	Cash	$	28.6
	Recognized amounts of identifiable assets acquired and liabilities assumed:
	Plant, property and equipment	25.9
	Inventory	2.7
	Total	$	28.6
	The results of Lake Terminal have been included in the consolidated financial statements since the acquisition date and are included in the Coal Logistics segment. Inclusive of intersegment sales of $13.1 million and $4.3 million, Lake Terminal had revenues of $13.4 million and $4.6 million, for the years ended December 31, 2014 and 2013, respectively. The acquisition of Lake Terminal increased operating income by $1.7 million and $1.9 million for the years ended December 31, 2014 and 2013, respectively. The acquisition of Lake Terminal is not material to the Company's consolidated financial statements; therefore, pro forma information has not been presented.
	Kanawha River Terminal LLC
	On October 1, 2013, the Partnership acquired Kanawha River Terminals ("KRT") for $84.7 million, utilizing $44.7 million of available cash and $40.0 million of borrowings under its existing revolving credit facility. KRT is a leading metallurgical and thermal coal blending and handling service provider with collective capacity to blend and transload more than 30 million tons of coal annually through its operations in West Virginia and Kentucky. KRT has and will continue to provide coal handling and blending services to third party customers as well as certain SunCoke cokemaking facilities. This acquisition is part of the Company’s strategy to grow through adjacent business lines. Goodwill of $8.2 million arising from the acquisition is primarily due to the strategic location of KRT’s operations.
	The following table summarizes the consideration paid for KRT and the fair value of assets acquired and liabilities assumed at the acquisition date (dollars in millions):
	Consideration:
	Cash	$	84.7
	Recognized amounts of identifiable assets acquired and liabilities assumed:
	Current assets	5.2
	Plant, property and equipment	67.2
	Intangible assets	7.9
	Current liabilities	(3.7		)
	Other long-term liabilities	(0.1		)
	Total identifiable net assets assumed	76.5
	Goodwill	8.2
	Total	$	84.7
	The results of KRT have been included in the consolidated financial statements since the acquisition date and are included in the Coal Logistics segment. Inclusive of intersegment sales of $5.7 million and $1.2 million, KRT had revenues of $41.6 million and $9.0 million for the years ended December 31, 2014 and 2013, respectively. The acquisition of KRT increased operating income by $5.0 million and $1.0 million for the years ended December 31, 2014 and 2013, respectively. The acquisition of KRT is not material to the Company’s consolidated financial statements; therefore, pro forma information has not been presented.

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2014
Business Combinations [Abstract]
Acquisitions	4. Drop-Down Transaction
	On May 9, 2014, SunCoke Energy contributed an additional 33 percent interest in the Haverhill and Middletown cokemaking facilities to the Partnership for a total transaction value of $365.0 million (the "Haverhill and Middletown Dropdown"). After the Haverhill and Middletown Dropdown, SunCoke Energy continued to own a 2.0 percent general partner interest in the Partnership, all of the incentive distribution rights, and a 54.1 percent limited partner interest in the Partnership, a decrease from the 55.9 percent interest held at December 31, 2013. Upon the closing of the Haverhill and Middletown Dropdown transaction, public unitholders held a 43.9 percent interest in the Partnership, which is reflected as a noncontrolling interest in the consolidated financial statements. We accounted for the Haverhill and Middletown Dropdown as an equity transaction, which resulted in a decrease in noncontrolling interest and an increase in SunCoke's equity of $83.7 million.
	Total value received by SunCoke Energy for the Haverhill and Middletown Dropdown included 2.7 million common units totaling $80.0 million and $3.3 million of general partner interests. In addition, the Partnership assumed and repaid approximately $271.3 million of our outstanding debt and other liabilities, including paying a market premium of $11.4 million to complete the tender of the senior unsecured notes. The remaining $10.4 million of transaction value consisted of $3.4 million in cash as well as $7.0 million retained by the Partnership to pre-fund our obligation to the Partnership for the anticipated cost of the environmental remediation project at Haverhill.
	In conjunction with the Haverhill and Middletown Dropdown, the Partnership closed on the issuance of 3.2 million common units to the public for $88.7 million of net proceeds, completed on April 30, 2014, and received approximately $263.1 million of gross proceeds from the issuance of $250.0 million aggregate principal amount of 7.375 percent senior notes due 2020 through a private placement on May 9, 2014. In addition, the Partnership received $5.0 million to fund interest from February 1, 2014 to May 9, 2014, the period prior to the issuance. This interest was paid to noteholders on August 1, 2014. See Note 15.
	The table below summarizes the effects of the changes in the Company’s ownership interest in Haverhill and Middletown on SunCoke’s equity.
		Year Ended December 31, 2014
		(Dollars in millions)
	Net loss attributable to SunCoke Energy, Inc.	$	(126.1	)
	Transfer from noncontrolling interest from change in SunCoke Energy, Inc. equity for the contribution of 33.0 percent interest in Haverhill and Middletown	83.7
	Change from net loss attributable to SunCoke Energy, Inc. and transfers from noncontrolling interest	$	(42.4	)
	5. Acquisitions
	SunCoke Lake Terminal LLC
	On August 30, 2013, the Partnership completed its acquisition of the assets and business operations of Lakeshore Coal Handling Corporation ("Lakeshore"), now called SunCoke Lake Terminal LLC ("Lake Terminal") for $28.6 million. Prior to the acquisition, the entity that owns SunCoke's Indiana Harbor cokemaking operations was a customer of Lakeshore and held the purchase rights to Lakeshore. Concurrent with the closing of the transaction, the Partnership paid $1.8 million to DTE Energy Company, the third party investor owning a 15 percent interest in the entity that owns Indiana Harbor, in consideration for assigning its share of the Lake Terminal buyout rights to the Partnership. The Partnership recognized this payment in selling, general, and administrative expenses on the Consolidated Statement of Operations during the period.
	Located in East Chicago, Indiana, Lake Terminal does not take possession of coal but instead derives its revenue by providing coal handling and blending services to its customers on a per ton basis. Lake Terminal has and will continue to provide coal handling and blending services to SunCoke's Indiana Harbor cokemaking operations. In September 2013, Lake Terminal and Indiana Harbor entered into a new 10-year contract with terms equivalent to those of an arm's-length transaction.
	The following table summarizes the consideration paid for Lake Terminal and the fair value of the assets acquired at the acquisition date (dollars in millions):
	Consideration:
	Cash	$	28.6
	Recognized amounts of identifiable assets acquired and liabilities assumed:
	Plant, property and equipment	25.9
	Inventory	2.7
	Total	$	28.6
	The results of Lake Terminal have been included in the consolidated financial statements since the acquisition date and are included in the Coal Logistics segment. Inclusive of intersegment sales of $13.1 million and $4.3 million, Lake Terminal had revenues of $13.4 million and $4.6 million, for the years ended December 31, 2014 and 2013, respectively. The acquisition of Lake Terminal increased operating income by $1.7 million and $1.9 million for the years ended December 31, 2014 and 2013, respectively. The acquisition of Lake Terminal is not material to the Company's consolidated financial statements; therefore, pro forma information has not been presented.
	Kanawha River Terminal LLC
	On October 1, 2013, the Partnership acquired Kanawha River Terminals ("KRT") for $84.7 million, utilizing $44.7 million of available cash and $40.0 million of borrowings under its existing revolving credit facility. KRT is a leading metallurgical and thermal coal blending and handling service provider with collective capacity to blend and transload more than 30 million tons of coal annually through its operations in West Virginia and Kentucky. KRT has and will continue to provide coal handling and blending services to third party customers as well as certain SunCoke cokemaking facilities. This acquisition is part of the Company’s strategy to grow through adjacent business lines. Goodwill of $8.2 million arising from the acquisition is primarily due to the strategic location of KRT’s operations.
	The following table summarizes the consideration paid for KRT and the fair value of assets acquired and liabilities assumed at the acquisition date (dollars in millions):
	Consideration:
	Cash	$	84.7
	Recognized amounts of identifiable assets acquired and liabilities assumed:
	Current assets	5.2
	Plant, property and equipment	67.2
	Intangible assets	7.9
	Current liabilities	(3.7		)
	Other long-term liabilities	(0.1		)
	Total identifiable net assets assumed	76.5
	Goodwill	8.2
	Total	$	84.7
	The results of KRT have been included in the consolidated financial statements since the acquisition date and are included in the Coal Logistics segment. Inclusive of intersegment sales of $5.7 million and $1.2 million, KRT had revenues of $41.6 million and $9.0 million for the years ended December 31, 2014 and 2013, respectively. The acquisition of KRT increased operating income by $5.0 million and $1.0 million for the years ended December 31, 2014 and 2013, respectively. The acquisition of KRT is not material to the Company’s consolidated financial statements; therefore, pro forma information has not been presented.

Equity_Method_Investment

Equity Method Investment	12 Months Ended
	Dec. 31, 2014
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investment	6. Equity Method Investment
	On March 18, 2013, we completed a transaction to form a joint venture, VISA SunCoke, with VISA Steel. VISA SunCoke is comprised of a 440 thousand ton heat recovery cokemaking facility and the facility's associated steam generation units in Odisha, India. We invested $67.7 million to acquire a 49 percent interest in VISA SunCoke with VISA Steel holding the remaining 51 percent interest. This investment is accounted for under the equity method under which investments are initially recorded at cost. We recognize our share of GAAP earnings in VISA SunCoke on a one-month lag and began recognizing such earnings in the second quarter of 2013. During 2014, as the result of continued downward market pressures in India due to increased Chinese imports and restrictions on iron ore mining in India, which limited steel production, the Company evaluated its investment in Visa SunCoke for impairment and recorded an impairment charge of $30.5 million. See Note 24. During the years ended December 31, 2014 and 2013, including the impairment charge, we incurred losses from the equity method investment in VISA SunCoke of $35.0 million and $2.2 million, respectively.

Customer_Concentrations

Customer Concentrations	12 Months Ended
	Dec. 31, 2014
Risks and Uncertainties [Abstract]
Customer Concentrations	7. Customer Concentrations
	In 2014, the Company sold approximately 4.2 million tons of coke to its three primary customers in the U.S.: ArcelorMittal, AK Steel and U.S. Steel. Substantially all of the production from the Jewell and Indiana Harbor facilities and approximately one-half of the production from the Haverhill facility is sold pursuant to long-term contracts with affiliates of ArcelorMittal. The remaining balance of coke sales at the Haverhill facility are primarily sold to AK Steel under long-term contracts. All coke sales from the Middletown cokemaking facility are made pursuant to a long-term contract with AK Steel. Substantially all coke sales from the Granite City cokemaking facility are made pursuant to a long-term contract with U.S. Steel. In addition, the licensing and operating fees, as well as preferred dividends pertaining to the Brazilian cokemaking operations, are payable to the Company under long-term contracts with a Brazilian subsidiary of ArcelorMittal.
	The Company generally does not require any collateral with respect to its receivables. At December 31, 2014, the Company’s receivables balance was primarily due from ArcelorMittal, AK Steel and U.S. Steel. As a result, the Company experiences concentrations of credit risk in its receivables with these three customers; these concentrations of credit risk may be affected by changes in economic or other conditions affecting the steel industry. At December 31, 2014, receivables due from ArcelorMittal, AK Steel and U.S. Steel were $48.5 million, $14.5 million and $6.4 million, respectively. Also included in receivables at December 31, 2014 was a $9.5 million preferred dividend from ArcelorMittal Brazil. This preferred dividend was recorded in other income, net on the Consolidated Statements of Operations.
	Sales to ArcelorMittal as well as licensing and operating fees from ArcelorMittal Brazil, in total, accounted for $781.6 million, $826.7 million and $1,018.9 million, or 53 percent, 53 percent and 56 percent, for the years ended December 31, 2014, 2013 and 2012, respectively, of the Company’s sales and other operating revenue and were recorded in the Domestic Coke and Brazil Coke segments. Additionally, preferred dividends from ArcelorMittal Brazil of $9.5 million, $9.5 million and $9.4 million, were recorded in other income, net on the Consolidated Statements of Operations.
	Sales to AK Steel, in total, accounted for $402.4 million, $468.6 million and $539.4 million, or 27 percent, 30 percent and 29 percent, for the years ended December 31, 2014, 2013 and 2012, respectively, of the Company’s sales and other operating revenue and were recorded in the Domestic Coke segment.
	Sales to U.S. Steel, in total, accounted for $232.3 million, $245.8 million and $273.7 million or 16 percent, 16 percent and 15 percent, for the years ended December 31, 2014, 2013 and 2012, respectively, of the Company’s sales and other operating revenue and were recorded in the Domestic Coke and Coal Logistics segments.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	8. Income Taxes
	The components of income from continuing operations before income tax expense are as follows:
		Years Ended December 31,
		2014			2013				2012
		(Dollars in millions)
	Domestic	$	35.2		$	71.7			$	92.2
	Foreign	11.4			12.5				7.8
	Total	$	46.6		$	84.2			$	100
	The components of income tax expense from continuing operations are as follows:
		Years Ended December 31,
		2014			2013				2012
		(Dollars in millions)
	Income taxes currently payable (receivable):
	U.S. federal	$	8		$	9.7			$	(16.2	)
	State	2.4			3.4				1.1
	Foreign	3			2.8				2.7
	Total taxes currently payable (receivable)	13.4			15.9				(12.4		)
	Deferred tax (benefit):
	U.S. federal	(7.5		)	(5.7		)		31
	State	1.5			6.2				(0.6		)
	Total deferred tax	(6.0		)	0.5				30.4
	Total	$	7.4		$	16.4			$	18
	The reconciliation of the income tax expense at the U.S. statutory rate to the income tax expense from continuing operations is as follows:
		Years Ended December 31,
		2014						2013						2012
		(Dollars in millions)
	Income tax expense at 35 percent U.S. statutory rate	$	16.3		35	%		$	29.5			35	%	$	35		35	%
	Increase (reduction) in income taxes resulting from:
	Income attributable to noncontrolling interests(1)	(8.7		)	(18.6	)%		(8.9		)		(10.6	)%	(1.3		)	(1.3	)%
	Nonconventional fuel credit	—			—	%		(9.5		)		(11.3	)%	(16.0		)	(16.0	)%
	State and other income taxes, net of federal income tax effects	2.9			6.2	%		5.2				6.2	%	0.3			0.3	%
	Return-to-provision adjustments	(1.8		)	(4.0	)%		(0.9		)		(1.1	)%	(1.1		)	(1.1	)%
	Change in valuation allowance(2)	11.1			23.7	%		0.9				1.1	%	(0.1		)	—	%
	Impact of tax sharing agreement	(0.8		)	(1.7	)%		0.4				0.5	%	—			—	%
	Domestic production activity deduction	(0.7		)	(1.4	)%		(0.5		)		(0.6	)%	(0.3		)	(0.3	)%
	Investment in Subsidiary(2)	(11.9		)	(25.5	)%		—				—	%	—			—	%
	Other	1			2.1	%		0.2				0.3	%	1.5			1.5	%
		$	7.4		15.8	%		$	16.4			19.5	%	$	18		18.1	%
	-1	No income tax expense is reflected in the Consolidated Statements of Operations for partnership income attributable to noncontrolling interests.
	-2	On December 22, 2014, SunCoke executed a definitive agreement to sell 100 percent of its interest in the entities that made up the Harold Keene Coal Companies. This required SunCoke to record a deferred tax asset of $11.9 million related to the outside basis difference on the Harold Keene investment. This deferred tax asset was offset by a $9.8 million valuation allowance.
	The tax effects of temporary differences that comprise the net deferred income tax liability from continuing operations are as follows:
		December 31,
		2014			2013
		(Dollars in millions)
	Deferred tax assets:
	Retirement benefit liabilities	$	14.6		$	13.4
	Black lung benefit liabilities	16.8			12.5
	Share-based compensation	6.9			5
	Federal tax credit carryforward	19.8			19.3
	State tax credit carryforward, net of federal income tax effects	9.2			8.6
	State net operating loss carryforward, net of federal income tax effects	5.4			5.3
	Other liabilities not yet deductible	18.7			9.8
	Investment in subsidiaries	11.8			—
	Total deferred tax assets	103.2			73.9
	Less valuation allowance	(14.7		)	(3.3		)
	Deferred tax asset, net	88.5			70.6
	Deferred tax liabilities:
	Properties, plants and equipment	(84.3		)	(118.1		)
	Investment in partnerships	(299.7		)	(294.6		)
	Total deferred tax liabilities	(384.0		)	(412.7		)
	Net deferred tax liability	$	(295.5	)	$	(342.1	)
	The net deferred income tax liability from continuing operations was classified in the consolidated balance sheets as follows:
		December 31,
		2014			2013
	(Dollars in millions)
Current asset	$	26.4		$	12.6
Noncurrent liability	(321.9		)	(354.7		)
Net deferred tax liability	$	(295.5	)	$	(342.1	)
As of December 31, 2014, we have $19.8 million of federal tax credit carryforwards that generally expire between 2032 and 2033. We have $14.6 million of state net operating loss and tax credit carryforwards that generally expire between 2017 and 2025.
Sunoco’s consolidated federal income tax returns, which includes SunCoke’s federal income tax return, have been examined by the Internal Revenue Service (“IRS”) for all years through the return for the year ended October 4, 2012, the last year for which Sunoco filed a consolidated federal income tax return. Except for refund claims, unrelated to SunCoke, filed by Sunoco for the years 2004 through 2011, agreement has been reached with the IRS on all issues for all years. All years 2007 through October 4, 2012, remain open and it is believed that the years 2004 through 2006 also remain open under certain circumstances. SunCoke is currently open to examination by the IRS for the tax years ended December 31, 2012 and forward.
State and foreign income tax returns are generally subject to examination for a period of three to five years after the filing of the respective returns. The state impact of any amended federal returns remains subject to examination by various states for a period of up to one year after formal notification of such amendments to the states.
There were no uncertain tax positions at December 31, 2014 and 2013 and there were no interest or penalties recognized during the years ended December 31, 2014, 2013 and 2012. The Company does not expect that any unrecognized tax benefits pertaining to income tax matters will be required in the next twelve months.
The Company has not recorded income taxes on the undistributed earnings of the India joint venture because such earnings are intended to be reinvested indefinitely to finance foreign activities. These additional foreign earnings could be subject to additional tax if remitted, or deemed remitted, as a dividend. At December 31, 2014, our Visa SunCoke joint venture had a cumulative loss on unconsolidated earnings. Given the cumulative losses incurred by our VISA SunCoke joint venture, there are currently no unconsolidated earnings that if remitted would result in additional tax.
On the Separation Date, SunCoke Energy and Sunoco entered into a new tax sharing agreement that governs the parties’ respective rights, responsibilities and obligations with respect to tax liabilities and benefits, tax attributes, the preparation and filing of tax returns, the control of audits and other tax proceedings and other matters regarding taxes.
SunCoke Energy is generally not entitled to receive payment from Sunoco in respect of any of SunCoke Energy’s tax attributes or tax benefits or any reduction of taxes of Sunoco. Moreover, Sunoco is generally entitled to refunds of income taxes with respect to periods ending at or prior to the Distribution. If SunCoke Energy realizes any refund, credit or other reduction in otherwise required tax payments in any period beginning after the Distribution Date as a result of an audit adjustment resulting in taxes for which Sunoco would otherwise be responsible, then, subject to certain exceptions, SunCoke Energy must pay Sunoco the amount of any such taxes for which Sunoco would otherwise be responsible. Further, if any taxes result to Sunoco as a result of a reduction in SunCoke Energy’s tax attributes for a period ending at or prior to the Distribution Date pursuant to an audit adjustment (relative to the amount of such tax attribute reflected on Sunoco’s tax return as originally filed), then, subject to certain exceptions, SunCoke Energy is generally responsible to pay Sunoco the amount of any such taxes.
SunCoke Energy has also agreed to certain restrictions that are intended to preserve the tax-free status of the contribution and the Distribution. These covenants include restrictions on SunCoke Energy’s issuance or sale of stock or other securities (including securities convertible into our stock but excluding certain compensatory arrangements), and sales of assets outside the ordinary course of business and entering into any other corporate transaction which would cause SunCoke Energy to undergo a 50 percent or greater change in its stock ownership. Certain key restrictions expired on January 18, 2014.
SunCoke Energy has generally agreed to indemnify Sunoco and its affiliates against any and all tax-related liabilities incurred by them relating to the contribution or the Distribution to the extent caused by an acquisition of SunCoke Energy’s stock or assets, or other of its actions. This indemnification applies even if Sunoco has permitted SunCoke Energy to take an action that would otherwise have been prohibited under the tax-related covenants as described above.
As of December 31, 2014, SunCoke Energy estimates that all tax benefits have been settled under the provisions of the tax sharing agreement. SunCoke Energy will continue to monitor the full utilization of all tax attributes when the respective tax returns are filed and will, consistent with the terms of the tax sharing agreement, record additional adjustments through earnings when necessary.
On the Separation Date, pursuant to the tax sharing agreement with Sunoco discussed above, it was determined that certain deferred tax assets attributable to net operating losses and credit carry forwards, which had been reflected in SunCoke Energy’s balance sheets prior to the Separation Date on a theoretical separate-return basis, were not realizable by SunCoke Energy. Accordingly, current and deferred tax benefits totaling $229.2 million were eliminated from the Consolidated Balance Sheets with a corresponding reduction to SunCoke Energy’s equity accounts, $85.8 million of which were eliminated in the year ended December 31, 2012.

Inventories

Inventories	12 Months Ended
	Dec. 31, 2014
Inventory Disclosure [Abstract]
Inventories	9. Inventories
	The Company’s inventory consists of metallurgical coal, which is the principal raw material for the Company’s cokemaking operations, coke, which is the finished goods sold by the Company to its customers, and materials, supplies and other.
	These components of inventories were as follows:
		December 31,
		2014		2013
		(Dollars in millions)
	Coal	$	96.5	$	81.2
	Coke	6.9		11.8
	Materials, supplies and other	35.7		35.6
	Total inventories	$	139.1	$	128.6

Properties_Plants_and_Equipmen

Properties, Plants, and Equipment, Net	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Properties, Plants, and Equipment, Net	10. Properties, Plants, and Equipment, Net
	The components of net properties, plants and equipment were as follows:
		December  31,(1)
		2014			2013
		(Dollars in millions)
	Coke and energy plant, machinery and equipment	$	1,676.20		$	1,596.50
	Coal logistics plant, machinery and equipment	83.6			82.6
	Land and land improvements	82.5			82.5
	Construction-in-progress	62.4			57.3
	Other	65.3			76.3
	Gross investment, at cost	1,970.00			1,895.20
	Less: Accumulated depreciation	(503.4		)	(436.3		)
	Total properties, plants and equipment, net	$	1,466.60		$	1,458.90
	-1	Includes assets, consisting mainly of coke and energy plant, machinery and equipment, with a gross investment totaling $1,155.1 million and $1,133.1 million and accumulated depreciation of $262.4 million and $228.9 million at December 31, 2014 and December 31, 2013, respectively, which are subject to long-term contracts to sell coke and are deemed to contain operating leases.

Asset_Retirement_Obligations

Asset Retirement Obligations	12 Months Ended
	Dec. 31, 2014
Asset Retirement Obligation [Abstract]
Asset Retirement Obligations	11. Asset Retirement Obligations
	The Company’s asset retirement obligations arise primarily from the Federal Surface Mining Control and Reclamation Act of 1977 and similar state statutes, which require that mine property be restored in accordance with specified standards and an approved reclamation plan. The Company also has asset retirement obligations related to certain contractual obligations, including the retirement and removal of long-lived assets from certain properties. We do not have any unrecorded asset retirement obligations.
	The following table provides a reconciliation of changes in the asset retirement obligation from continuing operations during each period (dollars in millions):
	Balance at January 1, 2013	$	7.7
	Liabilities incurred	3.1
	Liabilities settled	—
	Accretion expense(1)	0.6
	Revisions in estimated cash flows	(0.5		)
	Balance at December 31, 2013	$	10.9
	Liabilities incurred	2
	Liabilities settled	—
	Accretion expense(1)	0.9
	Revisions in estimated cash flows	1.3
	Balance at December 31, 2014	$	15.1
	-1	Included in cost of products sold and operating expenses.

Goodwill_and_Other_Intangible_

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	12. Goodwill and Other Intangible Assets
	The Company completed the acquisition of KRT during 2013 for an aggregate cash consideration, net of cash acquired, of $84.7 million, of which $8.2 million was allocated to goodwill primarily due to the strategic location of KRT's operations. Goodwill was $3.4 million and $8.2 million for our Domestic Coke and Coal Logistics segments, respectively, as of both December 31, 2014 and 2013.
	The following table summarized the components of gross and net intangible asset balances as of December 31, 2014 and December 31, 2013 (in millions):
			December 31, 2014						December 31, 2013
		Weighted - Average Remaining Amortization Years	Gross Carrying Amount		Accumulated Amortization		Net		Gross Carrying Amount		Accumulated Amortization		Net
	Customer contracts	6	$	7.7	$	4.2	$	3.5	$	7.7	$	3.6	$	4.1
	Customer relationships	10	6.7		0.7		6		6.7		0.1		6.6
	Trade name	4	1.2		0.3		0.9		1.2		—		1.2
	Total		$	15.6	$	5.2	$	10.4	$	15.6	$	3.7	$	11.9
	Total amortization expense for intangible assets subject to amortization was $1.5 million and $0.8 million for the years ended December 31, 2014 and December 31, 2013, respectively. Based on the carrying value of definite-lived intangible assets as of December 31, 2014, we estimate amortization expense to be $1.4 million in each of the next four years and $1.2 million in the fifth year.

Retirement_Benefits_Plans

Retirement Benefits Plans	12 Months Ended
	Dec. 31, 2014
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Retirement Benefits Plans	13. Retirement Benefits Plans
	Defined Benefit Pension Plan and Postretirement Health Care and Life Insurance Plans
	The Company has a noncontributory defined benefit pension plan (“defined benefit plan”), which provides retirement benefits for certain of its employees. The Company also has plans which provide health care and life insurance benefits for many of its retirees (“postretirement benefit plans”). The postretirement benefit plans are unfunded and the costs are borne by the Company.
	Effective January 1, 2011, pension benefits under the Company’s defined benefit plan were frozen for all participants in this plan. The Company also amended its postretirement benefit plans during the first quarter of 2010. Postretirement medical benefits for future retirees were phased out or eliminated, effective January 1, 2011, for non-mining employees with less than 10 years of service and employer costs for all those still eligible for such benefits were capped.
	Effective May 30, 2014, Dominion Coal Corporation, a wholly-owned subsidiary of the Company, terminated its defined benefit plan, a plan that was previously offered to generally all full-time employees of Dominion Coal Corporation. Distribution of plan assets resulting from the defined benefit plan termination will not be made until the Internal Revenue Service and Pension Benefit Guarantee Corporation determines that the termination satisfies the regulatory requirements, which is expected to occur in 2015, at which time settlement accounting will also occur. As a result of the termination of the defined benefit plan, each participant will become fully vested in his or her benefits under the defined benefit plan without regard to age and years of service. Participants with $25 thousand or less of benefits owed will have the option of receiving a lump sum payout or an annuity in full payment of their benefits under the defined benefit plan. All other participants will receive an annuity in full payment of their benefits under the defined benefit plan. The Company's pension obligation at December 31, 2014 reflects the Company's best estimate of a premium it expects to pay above the projected benefit obligation for annuities to fund the settlement of the plan.
	In connection with the plan to eliminate nearly 400 coal mining positions in 2014 and 2015 as discussed in Note 3, the postretirement benefit plan liability decreased by $1.4 million at December 31, 2014. The termination of coal mining employees in December 2014 triggered a curtailment gain of $2.5 million, which represented accelerated amortization of prior service credits previously recorded in accumulated other comprehensive income. Additionally, the termination of coal mining employees in 2015 is expected to result in postretirement benefit plan curtailment gains of approximately $4 million.
	Defined benefit plan expense (benefit) consisted of the following components:
		Years Ended December 31,
		2014				2013				2012
		(Dollars in millions)
	Interest cost on benefit obligations	$	1.5			$	1.3			$	1.5
	Expected return on plan assets	(1.8		)		(2.4		)		(1.8		)
	Amortization of:
	Actuarial losses	0.5				1				0.9
	Total expense (benefit)	$	0.2			$	(0.1	)		$	0.6
	Postretirement benefit plans benefit consisted of the following components:
		Years Ended December 31,
		2014				2013				2012
		(Dollars in millions)
	Service cost	$	0.2			$	0.3			$	0.3
	Interest cost on benefit obligations	1.5				1.4				1.8
	Amortization of:
	Actuarial losses	0.9				1.5				1.6
	Prior service benefit	(5.6		)		(5.7		)		(5.6		)
	Curtailment gain	(2.5		)		—				—
	Total	$	(5.5	)		$	(2.5	)		$	(1.9	)
	Amortization of actuarial losses for 2015 is estimated at $0.9 million for the defined benefit plan. Amortization of actuarial losses and prior service benefit for 2015 is estimated to be $0.8 million and $1.3 million, respectively, for the postretirement benefit plans.
	Defined benefit plan and postretirement benefit plans expense (benefit) is determined using actuarial assumptions as of the beginning of the year or using weighted-average assumptions when curtailments, settlements, and/or other events require a plan remeasurement. The following assumptions were used to determine defined benefit plan and postretirement benefit plans expense (benefit):
		Defined Benefit Plan									Postretirement Benefit Plans
		2014			2013			2012			2014		2013			2012
	Discount Rate	4.55	%		3.65	%		4.25	%		4.15	%	3.3	%		3.9	%
	Long-term expected rate of return on plan assets	4.9	%		7.1	%		6.25	%		—	%	—	%		—	%
	The long-term expected rate of return on plan assets was estimated based on a variety of factors, including the historical investment return achieved over a long-term period, the targeted allocation of plan assets and expectations concerning future returns in the marketplace for fixed income securities.
	The following amounts were recognized as components of other comprehensive (loss) income for the years ended December 31, 2014, 2013 and 2012:
		Defined Benefit Plan											Postretirement Benefit Plans
		2014				2013				2012			2014				2013			2012
		(Dollars in millions)
	Reclassifications to earnings of:
	Actuarial loss amortization	$	0.5			$	1			$	0.9		$	0.9			$	1.5		$	1.6
	Prior service benefit amortization	—				—				—			(5.6		)		(5.7		)	(5.6		)
	Curtailment gain	—				—				—			(2.5		)		—			—
	Retirement benefit plan funded status
	adjustments:
	Actuarial (losses) gains	(3.9		)		5.6				(1.9		)	0.2				3.9			0.4
	Prior service (cost) benefit	(0.5		)		—				—			—				—			3.9
		$	(3.9	)		$	6.6			$	(1.0	)	$	(7.0	)		$	(0.3	)	$	0.3
	The following tables set forth the components of the changes in benefit obligations and fair value of plan assets during 2014 and 2013, as well as the funded status at December 31, 2014 and 2013:
		Defined								Postretirement
		Benefit Plan								Benefit Plans
		2014				2013				2014			2013
		(Dollars in millions)
	Benefit obligations at beginning of year(1)	$	32.9			$	37.5			$	38.4		$	43.7
	Service cost	—				—				0.2			0.3
	Interest cost	1.5				1.3				1.5			1.4
	Actuarial losses (gains)	7.2				(3.9		)		1.2			(4.0		)
	Plan amendments(2)	0.5				—				—			—
	Curtailment of benefits	—				—				(1.4		)	—
	Benefits paid	(2.2		)		(2.0		)		(2.8		)	(3.0		)
	Benefit obligations at end of year(1)	$	39.9			$	32.9			$	37.1		$	38.4
	Fair value of plan assets at beginning of year	$	36.9			$	34.9
	Actual income on plan assets	5.1				4
	Benefits paid from plan assets	(2.2		)		(2.0		)
	Fair value of plan assets at end of year	$	39.8			$	36.9
	Net (liability) asset at end of year(3)	$	(0.1	)		$	4			$	(37.1	)	$	(38.4	)
(1) Represents both the accumulated benefit obligation and the projected benefit obligation for the defined benefit plan and the accumulated postretirement benefit obligations for the postretirement benefit plans.
(2) The pension plan was terminated, effective May 30, 2014. As part of the plan termination process, all partially vested terminated participants were fully vested, and as a result, their accrued benefit increased $0.5 million. The amount is treated as a new prior service cost base which will be amortized over the plan's average future service.
(3) Represents retirement benefit assets (liabilities), including current portion, on the Consolidated Balance Sheets. The current portion of retirement liabilities, which totaled $3.7 million and $3.6 million at December 31, 2014 and 2013, respectively, is classified in accrued liabilities on the Consolidated Balance Sheets.
The Company was not required and did not contribute to its defined benefit plan during 2014 and anticipates making contributions of $0.4 million during 2015 to complete the plan termination.
The following table sets forth the cumulative amounts not yet recognized in net income at December 31, 2014 and 2013:
	Defined								Postretirement
	Benefit Plan								Benefit Plans
	2014				2013				2014			2013
	(Dollars in millions)
Cumulative amounts not yet recognized in net income:
Actuarial losses	$	13.5			$	10.1			$	10		$	11.1
Prior service costs (benefits)	0.5				—				(8.4		)	(16.5		)
Accumulated other comprehensive loss (income) (before	$	14			$	10.1			$	1.6		$	(5.4	)
related tax benefit)
The following table sets forth the plan assets in the funded defined benefit plan measured at fair value, by input level, at December 31, 2014 and 2013:
	Quoted Prices in Active Markets for
	Identical Assets (Level 1)
	2014				2013
	(Dollars in millions)
Mutual Funds:
Fixed income securities	$	39.4			$	36
Cash and cash equivalents	0.4				0.9
Total	$	39.8			$	36.9
Investments in mutual funds are valued at the closing market price on the last business day of the year.
At the beginning of 2013, the target asset allocation and strategy was an allocation of 66 percent to equity securities and 34 percent to investment grade fixed income securities. During the second quarter of 2013, the pension plan's investment strategy and target asset allocation for non-cash investments was modified to implement an allocation of 50 percent equity securities and 50 percent to investment grade fixed income securities. During the fourth quarter of 2013, the target asset allocation and strategy was again modified to a portfolio of 100 percent investment grade fixed income securities with a weighted average duration approximately equal to the duration of the pension plan’s benefit obligation. The objective of this strategy is to minimize the risk of market volatility on the value of our pension plan assets.
The expected benefit payments through 2024 for the defined benefit plan and postretirement benefit plans are as follows:
	Defined				Postretirement
	Benefit Plan				Benefit Plans
	(Dollars in millions)
Year ending December 31:
2015	$	2.2			$	3.7
2016	2.3				3.8
2017	2.3				3.5
2018	2.3				3.2
2019	2.2				3
2020 through 2024	10.7				12.1
The measurement date for the Company’s defined benefit plan and postretirement benefit plans is December 31. The following discount rates were used at December 31, 2014 and 2013, respectively, to determine benefit obligations for the plans (in percentages):
	Defined						Postretirement
	Benefit Plan						Benefit Plans
	2014			2013			2014			2013
Discount rate	3.75	%		4.55	%		3.45	%		4.15	%
The health care cost trend assumption used at December 31, 2014, to compute the accumulated postretirement benefit obligation for the postretirement benefit plans was an increase of 7.50 percent (8.00 percent at December 31, 2013), which is assumed to decline gradually to 5.00 percent in 2020 and to remain at that level thereafter. A one-percentage point change each year in assumed health care cost trend rates would have an impact of less than $0.1 million on the total of service and interest cost components of postretirement benefits expense and the accumulated postretirement benefit obligation as of December 31, 2014 and 2013.
Defined Contribution Plans
The Company has defined contribution plans which provide retirement benefits for certain of its employees. The Company’s contributions, which are principally based on the Company’s pretax income and the aggregate compensation levels of participating employees and are charged against income as incurred, amounted to $8.0 million, $7.4 million and $6.2 million for years ended December 31, 2014, 2013 and 2012, respectively.

Accrued_Liabilities

Accrued Liabilities	12 Months Ended
	Dec. 31, 2014
Balance Sheet Related Disclosures [Abstract]
Accrued Liabilities	14. Accrued Liabilities
	Accrued liabilities consist of following:
		December 31,
		2014		2013
		(Dollars in millions)
	Accrued sales discounts	$	—	$	13.6
	Accrued benefits	21		23.5
	Other taxes payable	10.4		9.8
	Other	10.2		12.6
	Total	$	41.6	$	59.5

Debt

Debt	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Debt	15. Debt
	Total debt consisted of the following:
		December 31,
		2014		2013
		(Dollars in millions)
	Term loans, bearing interest at variable rates, due 2018, net of original issue discount of $1.0	$	—	$	99.1
	million at December 31, 2013(1)
	Revolving credit facility, due 2019	—		40
	7.625 percent senior notes, due 2019 (“Notes”)	240		400
	7.375 percent senior notes, due 2020 ("Partnership Notes"), including original issue premium of $11.5 million at December 31, 2014.	411.5		150
	Total debt	$	651.5	$	689.1
	Less: short-term debt, including current portion of long-term debt	—		41
	Total long-term debt	$	651.5	$	648.1
	(1) Borrowed under the Company’s Credit Agreement dated as of July 26, 2011 (“Credit Agreement”).
	Credit Facilities
	On July 26, 2011, SunCoke Energy entered into a Credit Agreement which provides for a seven-year term loan in a principal amount of $300.0 million (the “Term Loan”), repayable in equal quarterly installments at a rate of 1.00 percent of the original principal amount per year, with the balance payable on the final maturity date. Additionally, the Credit Agreement provided for up to $75.0 million of uncommitted incremental facility term loans (“Incremental Facilities”) that are available subject to the satisfaction of certain conditions. On December 15, 2011, SunCoke Energy borrowed an additional $30.0 million Term Loan as part of the Incremental Facilities. Upon issuance, the Term Loan and Incremental Facilities were recorded net of a $2.1 million debt discount. The proceeds from the Term Loan and Incremental Facilities were used to repay certain intercompany indebtedness to Sunoco, to pay related fees and expenses and for general corporate purposes.
	The Credit Agreement also provides for a five-year $150 million revolving facility (the “Revolving Facility”). The proceeds of any loans made under the Revolving Facility can be used to finance capital expenditures, acquisitions, working capital needs and for other general corporate purposes. As of December 31, 2014, the Revolving Facility had no draws and letters of credit outstanding of $1.5 million, leaving $148.5 million available subject to the terms of the Credit Agreement. Commitment fees are based on the unused portion of the Revolving Facility at a rate of 0.35 percent.
	In connection with the closing of the Partnership offering, the Partnership repaid $225.0 million of our Term Loan and we entered into an amendment to our Credit Agreement. In conjunction with the repayment, we incurred a charge of approximately $2.9 million, which is included in interest expense, net on the Consolidated Statement of Operations, representing the write-off of unamortized debt issuance costs and original issue discount related to the portion of the Term Loan extinguished. In connection with the Haverhill and Middletown Dropdown, the Partnership assumed from SunCoke and repaid $99.9 million of the Term Loan.
	The amendment to our Credit Agreement, among other things, modified provisions to reflect the Partnership offering including (i) changing the definition of “Consolidated Net Income” to include cash distributions received by the Company or a Restricted Subsidiary from an Unrestricted Subsidiary that is controlled directly or indirectly by the Company when calculating “Consolidated Net Income”, (ii) clarifying that obligations incurred by certain subsidiaries of the Company at or about the timing of the closing of the Partnership offering shall not be included in the definition of “Indebtedness,” and (iii) permitting an allowance for investments in Middletown Coke Company, LLC and Haverhill Coke Company LLC and certain other subsidiaries of the Company. In addition, we also designated Middletown Coke Company, LLC and Haverhill Coke Company LLC as unrestricted subsidiaries. Furthermore, the term of the Credit Agreement was extended to January 2018. We incurred debt issuance costs of $0.7 million in conjunction with this amendment which will be amortized through January 2018.
	Borrowings under the Revolving Facility bear interest, at SunCoke Energy’s option, at either (i) base rate plus an applicable margin or (ii) LIBOR plus an applicable margin. The applicable margin on loans made under the Revolving Facility is determined by reference to a consolidated leverage ratio based pricing grid. The weighted-average interest rate for borrowings outstanding under the Credit Agreement during 2014 was 4.06 percent.
	The obligations under the Credit Agreement are guaranteed by certain of the Company’s subsidiaries and secured by liens on substantially all of the Company’s and the guarantors’ assets pursuant to a Guarantee and Collateral Agreement, dated as of July 26, 2011, among the Company, the subsidiaries of the Company party thereto and JPMorgan Chase Bank, N.A, as administrative agent.
	In conjunction with the closing of the Partnership offering in 2013, the Partnership also entered into a $100.0 million revolving credit facility (the "Partnership Revolver") with a term extending through January 2018. The Partnership incurred issuance costs of $2.2 million in conjunction with entering into this new revolving credit facility. This credit facility was amended on August 28, 2013, increasing the total aggregate commitments from lenders to $150.0 million and now also providing for up to $100.0 million uncommitted incremental revolving capacity, subject to the satisfaction of certain conditions. The Partnership paid $0.9 million in fees related to the credit facility amendment. The fees have been included in deferred charges and other assets in the Consolidated Balance Sheet, which will be amortized over the life of the facility. On October 1, 2013 the Partnership borrowed $40.0 million against the revolving credit facility for the purchase of KRT. In connection with the Haverhill and Middletown Dropdown, the Partnership repaid $40.0 million on the Partnership Revolver and amended the Partnership Revolver to include (i) an increase in the total aggregate commitments from lenders from $150.0 million to $250.0 million and (ii) an extension of the maturity date from January 2018 to May 2019. The Partnership paid $1.8 million in 2014 for fees related to the Partnership Revolver amendment, which are included in deferred charges and other assets in the Consolidated Balance Sheet. The weighted-average interest rate for borrowings under the revolving credit facility during 2014 was 2.39 percent. At December 31, 2014, the Partnership Revolver had no letters of credit outstanding, leaving $250.0 million available. Commitment fees are based on the unused portion of the Partnership Revolver at a rate of 0.40 percent.
	Senior Notes
	On July 26, 2011, SunCoke Energy issued $400.0 million aggregate principal of senior notes (the “Notes”) in a private placement. The Notes bear interest at a rate of 7.625 percent per annum and will mature in 2019 with all principal paid at maturity. Interest on the Notes is payable semi-annually in cash in arrears on February 1 and August 1 of each year, commencing on February 1, 2012. The proceeds from the Notes were used to repay certain intercompany indebtedness to Sunoco, to pay related fees and expenses and for general corporate purposes. The Company recorded $19.1 million of deferred financing fees related to the issuance of the Notes and the facilities under the Credit Agreement. In connection with the Haverhill and Middletown Dropdown, the Partnership assumed from SunCoke and repaid $160.0 million of Notes.
	The Notes were offered in the U.S. to qualified institutional buyers in reliance on Rule 144A under the Securities Act, and outside the U.S. to non-U.S. persons in reliance on Regulation S under the Securities Act. On January 25, 2012, we completed an exchange offer for the Notes for an equal principal amount of the Notes whose sale is registered under the Securities Act.
	The Notes are the Company’s senior unsecured obligations and are guaranteed on a senior unsecured basis by each of the Company’s existing and future subsidiaries that guarantees the Company’s credit facilities (collectively, the “Notes Guarantors”). The Notes rank equally in right of payment to all of the Company’s existing and future unsecured unsubordinated debt and senior in right of payment to all of the Company’s existing and future debt that is by its terms expressly subordinated in right of payment to the Notes. The Notes are subordinated to indebtedness under the Credit Agreement as well as any future secured debt to the extent of the value of the assets securing such debt.
	Prior to August 1, 2014, the Company was permitted to redeem some or all the Notes by paying a “make-whole” premium. The Company also may redeem some or all of the Notes on or after August 1, 2014 at specified redemption prices.
	The Company is obligated to offer to purchase the Notes at a price of (a) 101 percent of their principal amount, together with accrued and unpaid interest, if any, to the date of purchase, upon the occurrence of certain change of control events and (b) 100 percent of their principal amount, together with accrued and unpaid interest, if any, to the date of purchase, with the proceeds from certain asset dispositions. These restrictions and prohibitions are subject to certain qualifications and exceptions set forth in the Indenture, including without limitation, reinvestment rights with respect to the proceeds of asset dispositions.
	Partnership Notes
	In addition, with the closing of the Partnership offering, the Partnership issued $150.0 million of Partnership Notes. In conjunction with this transaction, the Partnership incurred debt issuance costs of $3.7 million, $0.8 million of which were expensed immediately and were included in interest expense. Approximately $0.6 million of the total debt issuance costs associated with the Partnership Notes and the Partnership's revolving credit facility were paid during 2012.
	On May 9, 2014, in connection with the Haverhill and Middletown Dropdown, the Partnership issued $250.0 million add-on Partnership Notes. Proceeds of $263.1 million included an original issue premium of $13.1 million. In addition, the Partnership received $5.0 million to fund interest from February 1, 2014 to May 9, 2014, the period prior to the issuance. This interest was paid to noteholders on August 1, 2014. The Partnership incurred debt issuance costs of $4.9 million, of which $0.9 million was considered a modification of debt and was immediately expensed and recorded in interest expense, net in the Consolidated Statement of Operations and was included in other operating cash flows in the Consolidated Statement of Cash Flows.
	The Partnership Notes bear interest at a rate of 7.375 percent per annum and will mature on February 1, 2020. Interest on the Partnership Notes is payable semi-annually in cash in arrears on February 1 and August 1 of each year. The Partnership may redeem some or all of the Partnership Notes prior to February 1, 2016 by paying a “make-whole” premium. The Partnership also may redeem some or all of the Partnership Notes on or after February 1, 2016 at specified redemption prices. In addition, prior to February 1, 2016, the Partnership may redeem up to 35 percent of the Partnership Notes using the proceeds of certain equity offerings. If the Partnership sells certain of its assets or experiences specific kinds of changes in control, subject to certain exceptions, the Partnership must offer to purchase the Partnership Notes.
	As discussed above, in connection with the Haverhill and Middletown Dropdown, the Partnership assumed from SunCoke and repaid $99.9 million of Term Loan and $160.0 million of Notes. The Partnership also paid a market premium of $11.4 million to complete the tender of the Notes, which was included in interest expense, net in the Consolidated Statement of Operations. Debt extinguishment costs, including unamortized debt issuance costs and original issue discount, of $3.1 million were immediately expensed and recorded in interest expense, net in the Consolidated Statement of Operations.
	Covenants
	The Company and the Partnership are subject to certain debt covenants that, among other things, limit the Company's and Partnership’s ability and the ability of certain of the Company's and the Partnership’s subsidiaries to (i) incur indebtedness, (ii) pay dividends or make other distributions, (iii) prepay, redeem or repurchase certain debt, (iv) make loans and investments, (v) sell assets, (vi) incur liens, (vii) enter into transactions with affiliates and (viii) consolidate or merge. These covenants are subject to a number of exceptions and qualifications set forth in the respective agreements. Additionally, under the terms of the Credit Agreement, the Company is subject to a maximum consolidated leverage ratio of 3.75 to 1.00, calculated by dividing total debt by EBITDA as defined by the Credit Agreement, and a minimum consolidated interest coverage ratio of 2.75 to 1.00, calculated by dividing EBITDA by interest expense as defined by the Credit Agreement. Under the terms of the Partnership Revolver, the Partnership is subject to a maximum consolidated leverage ratio of 4.00 to 1.00, calculated by dividing total debt by EBITDA as defined by the Partnership Revolver, and a minimum consolidated interest coverage ratio of 2.50 to 1.00, calculated by dividing EBITDA by interest expense as defined by the Partnership Revolver. At December 31, 2014 the Company and the Partnership were in compliance with all applicable debt covenants contained in the Credit Agreement and the Partnership Revolver. We do not anticipate any violation of these covenants nor do we anticipate that any of these covenants will restrict our operations or our ability to obtain additional financing.
	Maturities
	There are no debt maturities in each of the next four years. Debt maturities in 2019 are $240 million.
	Interest Rate Swaps
	On August 15, 2011, the Company entered into interest rate swap agreements with an aggregate notional amount of $125.0 million. These agreements were terminated in 2014. See Note 24 for further information on the interest rate swaps.

Black_Lung_Benefit_Obligations

Black Lung Benefit Obligations	12 Months Ended
	Dec. 31, 2014
Black Lung Benefit Obligations [Abstract]
Black Lung Benefit Obligations	16. Black Lung Benefit Obligations
	The Company is responsible for making pneumoconiosis (“black lung”) benefit payments to certain of its employees and former employees and their dependents. Such payments are for claims under Title IV of the Federal Coal Mine Health and Safety Act of 1969 and subsequent amendments, as well as for black lung benefits provided in the states of Virginia, Kentucky and West Virginia pursuant to workers’ compensation legislation. The Company acts as a self-insurer for both state and federal black lung benefits and adjusts the Company’s accrual each year based upon actuarial calculations of the Company’s expected future payments for these benefits. The Patient Protection and Affordable Care Act (“PPACA”), which was implemented in 2010, amended previous legislation related to coal workers’ black lung obligations. PPACA provides for the automatic extension of awarded lifetime benefits to surviving spouses and changes the legal criteria used to assess and award claims.
	Our obligation related to black lung benefits is estimated based on various assumptions, including actuarial estimates, discount rates, and changes in health care costs. For the years ended December 31, 2014, 2013 and 2012, the discount rate used to calculate the period end liability was 3.65, 4.65 and 3.80 percent, respectively. The estimated liability was $43.9 million and $32.4 million at December 31, 2014 and 2013, respectively. In addition to changes in the discount rate and other assumptions, the estimated liability at December 31, 2014 was heavily impacted by a significant increase in the rate at which claims are awarded. The Company recognized expense of $14.3 million, income of $0.3 million and expense of $3.3 million during 2014, 2013, and 2012, respectively.

Commitments_and_Contingent_Lia

Commitments and Contingent Liabilities	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	17. Commitments and Contingent Liabilities
	The Company, as lessee, has noncancelable operating leases for land, office space, equipment and railcars. Total rental expense, net of sublease income, was $7.9 million, $6.4 million and $4.8 million in 2014, 2013 and 2012, respectively. Sublease income was generated from our former corporate headquarters located in Knoxville, Tennessee. Beginning in the second quarter of 2011, concurrent with our move to Lisle, Illinois, this space was subleased to another tenant. The sublease to this tenant was terminated during 2013. The Company is currently marketing the space for lease and remains directly liable to the landlord under the original lease.
	The aggregate amount of future minimum annual rental payments applicable to noncancelable operating leases is as follows:
		Minimum
		Rental
		Payments
		(Dollars in millions)
	Year ending December 31:
	2015	$	4.1
	2016	3.5
	2017	2
	2018	1.3
	2019	1
	2020-Thereafter	2.9
	Total	$	14.8
	On the Separation Date, SunCoke Energy and Sunoco entered into a guaranty, keep well, and indemnification agreement. Under this agreement, SunCoke Energy: (1) guarantees the performance of certain obligations of its subsidiaries, prior to the date that Sunoco or its affiliates may become obligated to pay or perform such obligations, including the repayment of a loan from Indiana Harbor Coke Company L.P.; (2) indemnifies, defends, and holds Sunoco and its affiliates harmless against all liabilities relating to these obligations; and (3) restricts the assets, debts, liabilities and business activities of one of its wholly-owned subsidiaries, so long as certain obligations of such subsidiary remain unpaid or unperformed. In addition, SunCoke Energy released Sunoco from its guaranty of payment of a promissory note owed by one of its subsidiaries to another of its subsidiaries.
	SunCoke is also party to an omnibus agreement pursuant to which we will provide remarketing efforts to the Partnership upon the occurrence of certain potential adverse events under our coke sales agreements, indemnification of certain environmental remediation project costs and litigation matters preferential rights for growth opportunities.
	The EPA and state regulators have issued Notices of Violations (“NOVs”) for our Haverhill and Granite City cokemaking facilities which stem from alleged violations of our air operating permits for these facilities. We are currently working in a cooperative manner with the EPA, Ohio Environmental Protection Agency and the Illinois Environmental Protection Agency to address the allegations, and have entered into a consent decree in federal district court with these parties. The consent decree includes an approximate $2.2 million civil penalty payment, which was paid in December 2014, as well as capital projects already underway to improve the reliability of the energy recovery systems and enhance environmental performance at the Haverhill and Granite City facilities. We anticipate spending approximately $125 million related to these projects, and have spent approximately $75 million since 2012. We plan to spend approximately $50 million in the 2015 to 2016 timeframe. A portion of the proceeds from the Partnership offering, the Haverhill and Middletown dropdown and the January 2015 Granite City dropdown (see Note 28) are being used to fund $119 million of these environmental remediation projects.
	The Company has also received NOVs from the EPA related to our Indiana Harbor cokemaking facility. After initial discussions with the EPA and the Indiana Department of Environmental Management (“IDEM”), resolution of the NOVs was postponed by mutual agreement because of ongoing discussions regarding the NOVs at the Haverhill and Granite City cokemaking facilities. In January 2012, the Company began working in a cooperative manner to address the allegations with the EPA, the IDEM and Cokenergy, Inc., an independent power producer that owns and operates an energy facility, including heat recovery equipment, a flue gas desulfurization system and a power generation plant, that processes hot flue gas from our Indiana Harbor facility to produce steam and electricity and to reduce the sulfur and particulate content of such flue gas. Settlement may require payment of a penalty for alleged past violations as well as undertaking capital projects to enhance reliability and environmental performance. In addition, we conducted an engineering study to identify major maintenance projects necessary to preserve the production capacity of the facility. As a result of higher than anticipated costs to refurbish ovens as well as the incremental costs of managing the refurbishment to minimize disruptions to ongoing operations, we spent approximately $105 million between 2012 and 2014, with approximately $25 million spent in 2014. The refurbishment project capital spending is now complete. We believe the project scope will address items that may be required in connection with the settlement of the NOVs at our Indiana Harbor facility. At this time, the Company cannot yet assess any future injunctive relief or potential monetary penalty and any potential future citations. The Company is unable to estimate a range of probable or reasonably possible loss.
	In September 2013, we reached agreement with our customer for a ten-year extension of our long-term contract. Key provisions of the extension agreement, which took effect October 1, 2013, are substantially similar to the existing agreement, including continuing the pass-through of coal costs, reimbursement of operating and maintenance expenses subject to certain metrics and a pricing adjustment per ton of coke produced to recognize the approximately $100 million in new capital being deployed to refurbish and upgrade this facility. We expect to earn a reasonable return on our investment, along with DTE Energy Company, the third party investor owning a 15 percent interest in the partnership (the “Indiana Harbor Partnership”) that owns the Indiana Harbor cokemaking facility.
	The Company is in discussions with ArcelorMittal to resolve claims by ArcelorMittal that certain shipments of coke did not meet coke quality targets. In the fourth quarter of 2013, the Company recorded an estimated liability of $2.5 million for the possible reimbursement of certain freight and handling costs incurred by ArcelorMittal and for the Company’s potential legal fees and costs in connection with this matter.
	Other legal and administrative proceedings are pending or may be brought against the Company arising out of its current and past operations, including matters related to commercial and tax disputes, product liability, antitrust, employment claims, premises-liability claims, allegations of exposures of third parties to toxic substances and general environmental claims. Although the ultimate outcome of these claims cannot be ascertained at this time, it is reasonably possible that some portion of these claims could be resolved unfavorably to the Company. Management of the Company believes that any liability which may arise from such matters would not be material in relation to the financial position, results of operations or cash flows of the Company at December 31, 2014.

Restructuring

Restructuring	12 Months Ended
	Dec. 31, 2014
Restructuring and Related Activities [Abstract]
Restructuring	18. Restructuring
	In the first quarter of 2014, we initiated a plan to reduce the workforce in our corporate office. We incurred total charges of $1.4 million in Corporate and Other related to this initiative and do not expect to incur any additional charges.
	The relocation of the Company's corporate headquarters from Knoxville, Tennessee to Lisle, Illinois, was completed during the second quarter of 2011 and resulted in a termination of employees eligible for severance benefits upon such termination. The company recorded related restructuring charges of $0.7 million, $1.3 million and $0.6 million in 2014, 2013 and 2012, respectively. These charges consists of employee-related costs, primarily related to relocation and lease termination and asset write-offs. The 2014 and 2013 restructuring charges include a change in estimate related to lease termination costs.
	The following table presents aggregate Corporate restructuring charges:
		Employee-			Asset write-offs			Contract			Total
		Related						Terminations
		Costs
		(Dollars in millions)
	Prior to 2012	$	5.5		$	0.9		$	2		$	8.4
	Year Ended December 31, 2012	0.5			—			0.1			0.6
	Year Ended December 31, 2013	0.1			—			1.2			1.3
	Year Ended December 31, 2014	1.4			—			0.7			2.1
	Charges recorded through December 31, 2014	$	7.5		$	0.9		$	4		$	12.4
	As of December 31, 2014, we do not believe any additional costs related to the Corporate restructuring would be material to our financial position in future periods. Employee-related costs and lease terminations are included in selling, general and administrative expenses. Asset write-offs are included in depreciation expense.
	The following table presents accrued restructuring and related activity for corporate as of and for the years ended December 31, 2014, 2013, and 2012:
		Employee-			Contract			Total
		Related			Terminations
		Costs
		(Dollars in millions)
	Balance at December 31, 2011	$	0.8		$	1.7		$	2.5
	Charges	0.5			0.1			0.6
	Cash payments	(0.7		)	(0.4		)	(1.1		)
	Balance at December 31, 2012	$	0.6		$	1.4		$	2
	Charges	0.1			1.2			1.3
	Cash payments	(0.6		)	(0.9		)	(1.5		)
	Balance at December 31, 2013	$	0.1		$	1.7		$	1.8
	Charges	1.4			0.7			2.1
	Cash Payments	(1.0		)	(1.0		)	(2.0		)
	Balance at December 31, 2014	$	0.5		$	1.4		$	1.9

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Loss	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Accumulated Other Comprehensive Loss	19. Accumulated Other Comprehensive Loss
	The following tables set forth the changes in the balance of accumulated other comprehensive loss, net of tax, by component:
		Benefit Plans			Currency Translation Adjustments			Total
		(Dollars in millions)
	At December 31, 2012	$	(6.6	)	$	(1.3	)	$	(7.9	)
	Other comprehensive loss before reclassifications	—			(10.0		)	(10.0		)
	Amounts reclassified from accumulated other comprehensive	(1.9		)	—			(1.9		)
	loss
	Retirement benefit plans funded status adjustment	5.7			—			5.7
	Net current period other comprehensive income (loss)	3.8			(10.0		)	(6.2		)
	At December 31, 2013	$	(2.8	)	$	(11.3	)	$	(14.1	)
	Other comprehensive loss before reclassifications	—			(0.8		)	(0.8		)
	Amounts reclassified from accumulated other comprehensive	(4.0		)	—			(4.0		)
	loss
	Retirement benefit plans funded status adjustment	(2.6		)	—			(2.6		)
	Net current period other comprehensive loss	(6.6		)	(0.8		)	(7.4		)
	At December 31, 2014	$	(9.4	)	$	(12.1	)	$	(21.5	)
	The tax benefit associated with the Company's benefit plans as of December 31, 2014 and 2013 was $6.2 million and $1.9 million, respectively.
	The impact of net income on reclassification adjustments from accumulated other comprehensive loss were as follows:
		December 31,
		2014			2013			2012
		(Dollars in millions)
	Amortization of benefit plans to net income:
	Prior service benefit and curtailment gain	$	8.1		$	5.7		$	5.6
	Actuarial loss	(1.4		)	(2.5		)	(2.5		)
	Total before taxes	6.7			3.2			3.1
	Income tax benefit	(2.7		)	(1.3		)	(1.2		)
	Total, net of tax	$	4		$	1.9		$	1.9

ShareBased_Compensation

Share-Based Compensation	12 Months Ended
	Dec. 31, 2014
Share-based Compensation [Abstract]
Share-Based Compensation	20. Share-Based Compensation
	Effective July 13, 2011, SunCoke Energy’s Board of Directors approved the SunCoke Energy, Inc. Long-Term Performance Enhancement Plan (“SunCoke LTPEP”). The SunCoke LTPEP provides for the grant of equity-based rewards including stock options and share units, or restricted stock, to the Company’s directors, officers, and other employees, advisors, and consultants who are selected by the plan committee for participation in the SunCoke LTPEP. The plan authorizes the issuance of (i) 1,600,000 shares of SunCoke Energy common stock issuable upon the adjustment of Sunoco equity awards in connection with the Distribution and (ii) up to 6,000,000 shares of SunCoke Energy common stock pursuant to new awards under the SunCoke LTPEP.
	The Company measures the cost of employee services in exchange for an award of equity instruments based on the grant-date fair value of the award. The total cost is reduced for estimated forfeitures over the awards’ vesting period and the cost is recognized over the requisite service period. Forfeiture estimates are reviewed on an annual basis at a minimum, or as deemed necessary based on actual forfeitures. Compensation expense is recorded ratably over the service period.
	Stock Options
	During the year ended December 31, 2014, 2013 and 2012, the Company granted stock options to certain employees to acquire 407,075, 446,948 and 486,182 shares of common stock, respectively. The stock options have a ten-year term and an exercise price, which was equal to the average of the high and low prices of SunCoke Energy common stock on the dates of grant. The weighted average exercise price was $22.30 per share, $16.55 per share and $14.29 per share in 2014, 2013 and 2012, respectively. The stock options become exercisable in three equal annual installments beginning one year from the date of grant (in each case subject to continued employment through the applicable vesting date). All awards vest immediately upon a change in control as defined by the SunCoke LTPEP.
	The Company calculates the value of each employee stock option, estimated on the date of grant, using the Black-Scholes option pricing model. The weighted-average fair value of employee stock options granted during the years ended December 31, 2014, 2013 and 2012 was $7.86, $6.00 and $5.70, respectively, using the following weighted-average assumptions:
		Years Ended December 31,
		2014		2013		2012
	Risk Free Interest Rate	1.57	%	0.93	%	0.82	%
	Expected Term	5 years		5 years		5 years
	Volatility	38	%	44	%	45	%
	Dividend Yield	—	%	—	%	—	%
	During 2014, we based our expected volatility on our historical volatility over our entire available trading history. Prior to 2014, the Company used the average implied volatility of the Dow Jones U.S. Steel index coupled with the implied volatility of the S&P 600. Since the Company does not have a direct peer group and only had a limited trading history, it believes this approach provided a reasonable implied volatility.
	The risk-free interest rate assumption is based on the U.S. Treasury yield curve at the date of grant for periods which approximates the expected life of the option. The dividend yield assumption is based on the Company’s future expectation of dividend payouts. All grants were made prior to the Board of Directors declaration of the Company's first dividend payment in the fourth quarter of 2014. The expected life of employee options represents the average contractual term adjusted by the average vesting period of each option tranche. In calculating the fair value of options in 2014, the Company estimated a three percent forfeiture rate for options excluding those issued to certain executive employees which were estimated at a zero percent forfeiture rate. The Company estimated a three percent forfeiture rate in calculating fair value in 2013 and a zero forfeiture rate in calculating fair value in 2012 for all employees. The estimated forfeiture rate may be revised in subsequent periods if the actual forfeiture rate differs significantly.
	The following table summarizes information with respect to common stock option awards outstanding as of December 31, 2014 and of stock option activity during the fiscal year then ended:
		Number of		Weighted			Weighted Average Remaining Contractual Term (years)	Aggregate
		Options		Average				Intrinsic Value (millions)
				Exercise Price
	Outstanding at December 31, 2013	2,287,252		$	16.52		8	$	14.4
	Granted	407,075		$	22.3
	Exercised	(185,433	)	$	16.96
	Forfeited	(105,044	)	$	19.55
	Outstanding at December 31, 2014	2,403,850		$	17.34		7.3	$	5.9
	Exercisable at December 31, 2014	1,570,632		$	16.66		6.8	$	4.2
	Expected to vest at December 31, 2014	828,226		$	18.63		8.3	$	1.6
	Intrinsic value for stock options is defined as the difference between the current market value of our common stock and the exercise price of the stock options. Total intrinsic value of stock options exercised during 2014 and 2013 was $0.9 million and $0.1 million, respectively. No options were exercised during 2012.
	The Company recognized $4.7 million, $3.0 million net of tax, $4.6 million, $2.9 million net of tax, and $3.8 million, $2.3 million net of tax, in compensation expense during the year ended December 31, 2014, 2013 and 2012, respectively, related to the above stock options. As of December 31, 2014, there was $3.4 million of total unrecognized compensation cost related to nonvested stock options. This compensation cost is expected to be recognized over the next 1.7 years.
	Restricted Stock Units
	During the year ended December 31, 2014, 2013 and 2012, the Company issued a total of 236,844, 293,918 and 83,082 restricted stock units (“RSU”) to certain employees for shares of the Company’s common stock. The weighted average grant date fair value was $22.06, $16.58 and $14.29, in 2014, 2013 and 2012, respectively. The RSUs vest in three annual installments beginning one year from the date of grant. All awards vest immediately upon a change in control as defined by the SunCoke LTPEP.
	The following table summarizes information with respect to RSUs outstanding as of December 31, 2014 and of RSU activity during the fiscal year then ended:
		Number of		Weighted
		RSUs		Average Grant-
				Date Fair Value
	Nonvested at December 31, 2013	501,801		$	16.44
	Granted	236,844		$	22.06
	Vested	(181,925	)	$	16.48
	Forfeited	(77,047	)	$	19.07
	Nonvested at December 31, 2014	479,673		$	18.77
	Total fair value of RSUs vested was $2.9 million, $1.3 million and $0.8 million during 2014, 2013 and 2012, respectively.
	The Company recognized $3.9 million, $2.5 million net of tax, $2.5 million, $1.6 million net of tax, and $1.5 million, $0.9 million net of tax, in compensation expense during the years ended December 31, 2014, 2013 and 2012, respectively, related to the above RSUs. As of December 31, 2014, there was $6.2 million of total unrecognized compensation cost related to nonvested RSUs. This compensation cost is expected to be recognized over the next 1.7 years.
	Performance Share Units
	The Company issued 84,734 and 96,073 performance share units ("PSU") for shares of the Company's common stock during the years ended December 31, 2014 and 2013, respectively, that vest on December 31, 2016 and 2015, respectively. All awards vest immediately upon a change in control and a qualifying termination of employment as defined by the SunCoke LTPEP. The weighted average fair value of the PSUs granted during the years ended December 31, 2014 and 2013 was $26.09 and $19.56, respectively, and is based on the closing price of our common stock on the date of grant as well as a Monte Carlo simulation for the portion of the award subject to market conditions.
	The number of PSUs ultimately awarded will be adjusted based upon the following metrics: (1) 50 percent of the award will be determined by the Company's three year total shareholder return ("TSR") as compared to the TSR of the companies making up the S&P 600; and (2) 50 percent of the award will be determined by the Company's three year average pre-tax return on capital for the Company's coke and coal logistics businesses for the 2014 grants and coke business only for the 2013 grants. Each portion of the award may be adjusted between zero and 200 percent of the original units granted.
	The following table summarizes information with respect to unearned PSUs outstanding as of December 31, 2014 and of PSU activity during the fiscal year then ended:
		Number of		Weighted
		PSUs		Average Grant-
				Date Fair Value
	Nonvested at December 31, 2013	96,073		$	19.56
	Granted	84,734		$	26.09
	Vested	—		$	—
	Forfeited	(19,369	)	$	19.21
	Nonvested at December 31, 2014	161,438		$	22.63
	As of December 31, 2014, the Company had 161,438 PSUs outstanding. The Company recognized $1.2 million, $0.7 million net of tax, and $0.5 million, $0.3 million net of tax, during the years ended December 31, 2014 and 2013, respectively. As of December 31, 2014, there was $2.3 million of total unrecognized compensation cost related to these nonvested PSUs. This compensation cost is expected to be recognized over the next 1.7 years.
	Modifications
	In connection with the Distribution, certain Sunoco common stock awards and stock options that were held by Sunoco employees, Sunoco directors and SunCoke Energy employees were modified and an anti-dilutive provision was added. In general, all Sunoco stock options held by Sunoco employees and Sunoco directors were converted into both Sunoco and SunCoke Energy stock options. Sunoco stock options held by SunCoke Energy employees were converted to SunCoke Energy stock options. All SunCoke Energy common stock issued as a result of option exercises or the vesting of common stock awards will be issued under the SunCoke LTPEP.
	At the Distribution Date, 1,219,842 SunCoke Energy stock options were issued in connection with the conversion of the outstanding Sunoco stock options to Sunoco employees and directors, of which 138,194 were outstanding at December 31, 2014. The converted stock options for Sunoco employees and directors are fully vested and exercisable and any expense associated with the modification of these stock options was recognized by Sunoco. The exercise prices for these stock options range from $4.77 to $29.35 per share. The stock options expire 10 years from the date of the original grant, and the remaining outstanding options have a weighted average remaining life of 2.1 years and an aggregate intrinsic value of $0.2 million. During the years ended December 31, 2014, 2013 and 2012, 59,462, 167,762 and 463,699 options were exercised, respectively, with intrinsic values of $0.4 million, $0.9 million and $2.6 million, respectively. In 2014, 2013 and 2012, respectively, 14,640, 361,604 and 14,481 options were cancelled in accordance with the terms of the Sunoco share-based compensation plan.
	At the Distribution Date, 295,854 SunCoke Energy stock options were issued in connection with the conversion of the outstanding Sunoco stock options for SunCoke Energy employees, all of which are fully vested with 282,277 outstanding and exercisable as of December 31, 2014. The exercise prices for these stock options range from $8.93 to $22.31 per share. In the first quarter of 2013, SunCoke Energy recorded a $0.5 million charge in connection with the award modification and the addition of an anti-dilution provision. The stock options expire 10 years from the date of the original grant, and the remaining outstanding options have a weighted average remaining contractual term of 3.7 years and an aggregate intrinsic value of $1.6 million. During the year ended December 31, 2012, 13,577 options were exercised with an intrinsic value of $0.1 million. No options were exercised during 2013 or 2014. These awards were fully expensed prior to 2014 and compensation expense during the years ended December 31, 2013 and 2012 was not material.

Earnings_per_Share

Earnings per Share	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Earnings per Share	21. Earnings per Share
	Basic earnings per share has been computed by dividing net income (loss) from continuing operations available to SunCoke Energy, Inc. by the weighted average number of shares outstanding during the period. Except where the result would be anti-dilutive, diluted earnings per share has been computed to give effect to share-based compensation awards using the treasury stock method.
	The following table sets forth the reconciliation of the weighted-average number of common shares used to compute basic earnings per share (“EPS”) to those used to compute diluted EPS:
		Years Ended December 31,
		2014	2013	2012
		(Shares in millions)
	Weighted-average number of common shares outstanding-basic	68.8	69.9	70
	Add: effect of dilutive share-based compensation awards	—	0.3	0.3
	Weighted-average number of shares-diluted	68.8	70.2	70.3
	For the year ended December 31, 2014, 2013 and 2012, diluted earnings per share was calculated to give effect to share-based compensation awards granted using the treasury stock method. In 2014, the potential dilutive effect of 2.7 million stock options, 0.5 million restricted stock units and 0.1 million performance stock units were excluded from the computation of diluted weighted-average shares outstanding, as the shares would have been anti-dilutive. In 2013, the potential dilutive effect of 0.2 million stock options units was excluded from the computation of diluted earnings per share as the shares would have been anti-dilutive. In 2012, the potential dilutive effect of 2.5 million stock options and 0.1 million restricted stock units was excluded from the computation of diluted earnings per share as the shares would have been anti-dilutive.
	On February 16, 2012, our Board of Directors authorized a program to repurchase an aggregate amount of up to 3,500,000 shares of our common stock through the end of 2015 from time to time in the open market, through privately negotiated transactions, block transactions or otherwise in order to counter the dilutive impact of exercised stock options and the vesting of restricted stock grants. This program, under which nearly 1.8 million shares were repurchased, was superseded and replaced by a new and larger program discussed below.
	On July 23, 2014, the Company's Board of Directors authorized a program to repurchase outstanding shares of the Company’s common stock, $0.01 par value, at any time and from time to time in the open market, through privately negotiated transactions, block transactions, or otherwise for a total aggregate cost to the Company not to exceed $150.0 million.
	As part of the new $150.0 million program, the Company's Board of Directors has authorized the Company to purchase shares of Company common stock directly from an investment bank, or broker, pursuant to an accelerated share repurchase arrangement, or similar contract. In accordance with this authorization, the Company entered into a share repurchase agreement for an aggregate cost to the Company of $75.0 million on July 29, 2014. In October 2014, 3.2 million shares were delivered to the Company at an average price of $23.28 per share, completing the $75.0 million forward share repurchase agreement, and leaving $75.0 million available under the repurchase program. In January 2015, the Company entered into an agreement for the repurchase of an additional $20.0 million of our common stock, leaving $55.0 million available under the repurchase program. See Note 28.

Equity_Distribution_Agreement

Equity Distribution Agreement	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Equity Distribution Agreement	22. Equity Distribution Agreement
	On August 5, 2014, the Partnership entered into an equity distribution agreement (the “Equity Agreement”) with Wells Fargo Securities, LLC (“Wells Fargo”). Pursuant to the terms of the Equity Agreement, the Partnership may sell from time to time through Wells Fargo, the Partnership’s common units representing limited partner interests having an aggregate offering price of up to $75.0 million. Sales of the common units, if any, will be made by means of ordinary brokers’ transactions through the facilities of the New York Stock Exchange at market prices, in block transactions, or as otherwise agreed by the Partnership and Wells Fargo, by means of any other existing trading market for the common units or to or through a market maker other than on an exchange. The common units will be issued pursuant to the Partnership’s existing effective shelf registration statement.
	Under the terms of the Equity Agreement, the Partnership also may sell common units to Wells Fargo as principal for its own account at a price to be agreed upon at the time of sale. Any sale of common units to Wells Fargo as principal would be pursuant to the terms of a separate terms agreement between the Partnership and Wells Fargo.
	During 2014, the Partnership sold 62,956 common units under the Equity Agreement with an aggregate offering price of $1.8 million, leaving $73.2 million available under the Equity Agreement. As a result, at December 31, 2014, 44.0 percent interest in the Partnership is held by public unitholders and is reflected in noncontrolling interest on our Consolidated Statement of Operations and Consolidated Balance Sheet. The Company owns the remaining 56.0 percent interest in the Partnership through our general partner and limited partner interest.

Supplemental_Cash_Flow_Informa

Supplemental Cash Flow Information	12 Months Ended
	Dec. 31, 2014
Supplemental Cash Flow Information [Abstract]
Supplemental Cash Flow Information	23. Supplemental Cash Flow Information
	Net cash provided by continuing operating activities reflected cash payments for interest and income taxes as follows:
		Years Ended December 31,
		2014		2013		2012
		(Dollars in millions)
	Interest paid	$	45.8	$	43.2	$	44
	Income taxes paid	$	9.1	$	15.3	$	6.3

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value Measurements	24. Fair Value Measurements
	The Company measures certain financial and non-financial assets and liabilities at fair value on a recurring basis. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in the principal or most advantageous market in an orderly transaction between market participants on the measurement date. Fair value disclosures are reflected in a three-level hierarchy, maximizing the use of observable inputs and minimizing the use of unobservable inputs.
	The valuation hierarchy is based upon the transparency of inputs to the valuation of an asset or liability on the measurement date. The three levels are defined as follows:
	•	Level 1—inputs to the valuation methodology are quoted prices (unadjusted) for an identical asset or liability in an active market.
	•	Level 2—inputs to the valuation methodology include quoted prices for a similar asset or liability in an active market or model-derived valuations in which all significant inputs are observable for substantially the full term of the asset or liability.
	•	Level 3—inputs to the valuation methodology are unobservable and significant to the fair value measurement of the asset or liability.
	Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis
	Certain assets and liabilities are measured at fair value on a recurring basis. The Company’s cash equivalents, which amounted to $88.2 million and $125.1 million at December 31, 2014 and 2013, respectively, were measured at fair value based on quoted prices in active markets for identical assets. These inputs are classified as Level 1 within the valuation hierarchy.
	Foreign Currency Hedge
	The Company occasionally utilizes foreign exchange derivatives to manage the risks associated with fluctuations in foreign currency exchange rates and accounts for them under ASC 815—Derivatives and Hedging, which requires all derivatives to be marked to market (fair value). The Company does not purchase or hold any derivatives for trading purposes. On November 26, 2012, the Company entered into agreements to purchase approximately 1.845 billion Indian rupees at a weighted average rate of 56.075 with a settlement date of January 31, 2013, which was extended to March 14, 2013. Additionally, on February 21, 2013, the Company entered into agreements to purchase an additional 1.830 billion Indian rupees at a weighted average rate of 54.810 with a settlement date of March 14, 2013, at which point our Indian joint venture investment was fully hedged. The Company did not elect hedge accounting treatment for this foreign exchange contract and, therefore, the changes in the fair value of the derivative are recorded in other income, net on the Consolidated Statement of Operations.
	For the year ended December 31, 2012, the mark to market impact of the foreign exchange contract on other income, net was an increase of $0.6 million and was calculated utilizing published rates between the U.S. dollar and Indian rupee at December 31, 2012, which are classified as Level 1 within the valuation hierarchy. For the year ended December 31, 2013, a gain of approximately $0.9 million was recognized in other income related to the cash settlement on March 14, 2013 of the Indian rupee contracts. There were no foreign exchange contracts outstanding at December 31, 2014 or 2013.
	Interest Rate Swap
	The Company utilizes interest rate swaps to manage the risk associated with changing interest rates and accounts for them under ASC 815—Derivatives and Hedging, which requires all derivatives to be marked to market (fair value). The Company does not purchase or hold any derivatives for trading purposes. On August 15, 2011, the Company entered into interest rate swap agreements with an aggregate notional amount of $125.0 million. The agreements had an expiration date three years from the forward effective date of October 11, 2011. During the first quarter of 2013, we settled one of the interest rate swaps having a notional amount of $25.0 million. The remaining interest rate swaps having a notional amount of $100.0 million were settled in the second quarter of 2014. The impact of these settlements on the financial statements was not material. Under the interest rate swap agreements, the Company paid a weighted average fixed rate of 1.3175 percent in exchange for receiving floating rate payments based on the greater of 1.0 percent or three-month LIBOR. The Company did not elect hedge accounting treatment for these interest rate swaps and, therefore, the changes in the fair value of the interest rate swap agreements were recorded in interest expense in the Consolidated Statement of Operations. There were no interest rate swap agreements outstanding at December 31, 2014.
	The mark to market impact of the swap agreement on interest expense during 2014 was not material and there were no interest rate swap agreements outstanding at December 31, 2014. The fair value of the swap agreement at December 31, 2013 was a liability of approximately $0.3 million. The mark to market impact of the swap arrangement on interest expense was a decrease of approximately $0.4 million in the year ended December 31, 2013 and an increase of $0.2 million in the year ended December 31, 2012. In estimating the fair market value of interest rate swaps, the Company utilized a present value technique which discounts future cash flows against the underlying floating rate benchmark. Derivative valuations incorporate credit risk adjustments that are necessary to reflect the probability of default by the counterparty. These inputs are not observable in the market and are classified as Level 3 within the valuation hierarchy.
	Non-Financial Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis
	Certain assets and liabilities are measured at fair value on a nonrecurring basis; that is, the assets and liabilities are not measured at fair value on an ongoing basis, but are subject to fair value adjustments in certain circumstances (e.g., when there is evidence of impairment).
	Coal Long-Lived Assets and Goodwill Impairment
	In the second quarter of 2014, prior to meeting the held for sale criteria, the Company evaluated the recoverability of its long-lived coal asset group given the probable disposition of the assets as well as projected losses resulting from the weakening coal market.
	The Company performed a probability-weighted undiscounted cash flows analysis which indicated that the carrying value of the asset group was not recoverable.  As such, the Company reduced the carrying value of the long-lived assets to their estimated fair value and recorded a pre-tax impairment charge of $97.1 million, of which $82.0 million is related to the coal disposal group and reflected in the results of discontinued operations for the year ended December 31, 2014 and $15.1 million is related to the coal preparation plant which is considered a legacy asset (see Note 3) and therefore reflected in the results of continuing operations for the year ended December 31, 2014.  The fair value was determined based on estimated discounted cash flows from the coal mining assets, which reflected the weakness in the coal market and were considered Level 3 inputs in the fair value hierarchy. Key assumptions included (a) coal sales prices of $97 per ton to $149 per ton; (b) sales volumes of 1.6 million tons to 1.8 million tons; and (c) a 14.0 percent discount rate representing the estimated weighted average cost of capital.  Various third party indicative offers for the assets were considered and were also included in the Company's assessment of the fair value of the asset group. In previous analyses, based upon the business plan and market expectations of coal prices at that time, the carrying value was recoverable and was substantially in excess of the undiscounted cash flows.  Recent changes in market conditions, specifically decreased coal sales price expectations, were included in our asset impairment analysis.
	As a result of the probable sale of the business, the weakening coal market and the long-lived asset impairment discussed above, the Company also performed a goodwill impairment analysis as of June 30, 2014 for the coal mining reporting unit.  This analysis concluded the fair value of the reporting unit, based on a discounted cash flows analysis, was less than the carrying amount.  As a result, the Company recorded a $6.0 million pre-tax impairment of the entire goodwill balance.
	Coal Disposal Group Valuation
	Concurrent with the presentation of our coal mining business as held for sale in the third quarter of 2014, the Company continued to assess the carrying value of the disposal group in the third and fourth quarters of 2014 and adjusted the carrying value to fair value less costs to sell. This resulted in additional impairment charges of $45.5 million ($27.9 million, net of tax) recorded in loss from discontinued operations, net of tax on the Consolidated Statement of Operations during 2014 and a valuation allowance of $45.5 million in current assets held for sale on the Consolidated Balance Sheet at December 31, 2014. The fair value was estimated utilizing a market approach, which was considered Level 2 in the fair value hierarchy.
	India Equity Method Investment Valuation
	During 2014, VISA SunCoke continued to experience downward market pressures. Coke imports from China caused weakness in the coke pricing environment, and certain iron ore restrictions in India limited steel production. As a result of these sustained depressed market conditions, the Company evaluated the recoverability of its equity method investment in Visa SunCoke. The fair value of the equity method investment was determined based on estimated cash flows of VISA SunCoke discounted at 13.5 percent and resulted in an other-than-temporary impairment charge of the joint venture investment in the Company's India reportable segment of $30.5 million, which was recorded in loss from equity method investment on the Consolidated Statement of Operations.
	The estimated discounted cash flows reflect weakness in the India market and utilize inputs considered Level 3 in the fair value hierarchy. Key assumptions in the discounted cash flow analysis included the timing and extent of future improvements in the Indian market and gross margin of $4 per ton to $24 per ton. These assumptions reflect the recent lifting of iron ore mining restrictions and the anticipated mitigation of Chinese coke imports. A $5 per ton change in gross margin would impact the valuation of our investment by approximately $8 million. To the extent possible, the Company considered available market information and other third-party data and compared the inputs to relevant historical information.
	Certain Financial Assets and Liabilities not Measured at Fair Value
	At December 31, 2014 and 2013, the fair value of the Company’s long-term debt was estimated to be $662.9 million and $687.1 million, respectively, compared to a carrying amount of $651.5 million and $689.1 million, respectively, which were net of original issue discount. These fair values were estimated by management based upon estimates of debt pricing provided by financial institutions which are considered Level 2 inputs.

Business_Segment_Information

Business Segment Information	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Business Segment Information	25. Business Segment Information
	The Company is an independent owner and operator of five cokemaking facilities in the eastern and midwestern regions of the U.S. The Company is also the operator of a cokemaking facility for a project company in Brazil in which it has a preferred stock investment and is a 49 percent joint venture partner in a cokemaking operation in India. In addition to its cokemaking operations, the Company has metallurgical coal mining operations in the eastern U.S. as well as coal handling and blending operations in the eastern and midwestern regions of the U.S. These coal mining operations are included in discontinued operations on the Consolidated Statement of Operations. See Note 3.
	The Domestic Coke segment includes the Jewell, Indiana Harbor, Haverhill, Granite City and Middletown cokemaking facilities. Each of these facilities produces coke and all facilities except Jewell recover waste heat which is converted to steam or electricity through a similar production process. Coke sales at each of the Company's five domestic cokemaking facilities are made pursuant to long-term take-or-pay agreements with ArcelorMittal, AK Steel, and U.S. Steel. Each of the coke sales agreements contains pass-through provisions for costs incurred in the cokemaking process, including coal procurement costs (subject to meeting contractual coal-to-coke yields), operating and maintenance expense, costs related to the transportation of coke to the customers, taxes (other than income taxes) and costs associated with changes in regulation, in addition to containing a fixed fee.
	On March 18, 2013, we completed the transaction to form a cokemaking joint venture called VISA SunCoke with VISA Steel. VISA SunCoke is comprised of a 440 thousand ton heat recovery cokemaking facility and the facility's associated steam generation units in Odisha, India. We own a 49 percent interest in VISA SunCoke and account for this investment under the equity method. We recognize our share of earnings in VISA SunCoke on a one-month lag and began recognizing such earnings in the second quarter of 2013. The results of our joint venture are presented below in the India Coke segment.
	The Brazil Coke segment operates a cokemaking facility located in Vitória, Brazil for a project company. The Brazil Coke segment earns income from the Brazilian facility through (1) licensing and operating fees payable to us under long-term contracts with the local project company that will run through at least 2022; and (2) an annual preferred dividend on our preferred stock investment from the project company guaranteed by the Brazil subsidiary of ArcelorMittal.
	Coal Logistics operations are comprised of Lake Terminal and KRT facilities located in Indiana and Kentucky, respectively. The Partnership acquired Lake Terminal on August 30, 2013 and KRT on October 1, 2013 and began providing coal handling and blending services. This business has a collective capacity to blend and transload more than 30 million tons of coal annually. Coal handling and blending services are provided to third party customers as well as certain SunCoke cokemaking facilities. Coal handling and blending results are presented in the Coal Logistics segment below.
	Corporate expenses that can be identified with a segment have been included in determining segment results. The remainder is included in Corporate and Other, including certain legacy coal mining assets (i.e. coal preparation plant) and liabilities (i.e. black lung, workers' compensation, certain asset retirement obligations and net pension and other postretirement employee benefit obligations), which are expected to be retained by the Company. See Note 3. The related legacy costs are included in Corporate and Other and are included in Consolidated Adjusted EBITDA but are excluded from Adjusted EBITDA from continuing operations. Interest expense, net, which consists principally of interest income, interest expense and interest capitalized, is also excluded from segment results. Segment assets, net of tax are those assets that are utilized within a specific segment and excludes deferred taxes and current tax receivables (payables).
	The following table includes Adjusted EBITDA, which is the measure of segment profit or loss reported to the chief operating decision maker for purposes of allocating resources to the segments and assessing their performance:
			Year Ended December 31,
			2014				2013				2012
			(Dollars in millions)
	Sales and other operating revenue:
	Domestic Coke		$	1,388.30			$	1,528.70			$	1,816.80
	Brazil Coke		37				35.4				36.9
	Coal Logistics		36.2				8.1				—
	Coal Logistics intersegment sales		18.8				5.5				—
	Corporate and other intersegment sales		18.6				17.5				17.9
	Elimination of intersegment sales		(37.4		)		(23.0		)		(17.9		)
	Total sales and other operating revenue		$	1,461.50			$	1,572.20			$	1,853.70
	Adjusted EBITDA:
	Adjusted EBITDA from continuing operations:
	Domestic Coke		$	247.9			$	243.2			$	249.3
	Brazil Coke		18.9				16.1				11.9
	India Coke		(3.1		)		0.9				—
	Coal Logistics		14.3				4.7				—
	Corporate and Other		(40.2		)		(43.1		)		(33.5		)
	Total Adjusted EBITDA from continuing operations		237.8				221.8				227.7
	Legacy costs, net		(17.1		)		(0.4		)		(3.9		)
	Adjusted EBITDA from discontinued operations		(10.0		)		(6.3		)		41.8
	Adjusted EBITDA		$	210.7			$	215.1			$	265.6
	Depreciation and amortization expense:
	Domestic Coke		$	81.3			$	68.1			$	60.7
	Brazil Coke		0.5				0.4				0.3
	Coal Logistics		7.6				1.8				—
	Corporate and Other		6.7				6.8				4
	Total depreciation and amortization expense		$	96.1			$	77.1			$	65
	Capital expenditures:
	Domestic Coke		$	109.2			$	121.2			$	42.3
	Brazil Coke		0.9				0.8				1.5
	Coal Logistics		2.9				0.2				—
	Corporate and Other		5.3				10.1				10.4
	Total capital expenditures		$	118.3			$	132.3			$	54.2
			Year Ended December 31,
			2014				2013
			(Unaudited)
			(Dollars in millions, except
			per share amounts)
	Segment assets
	Domestic Coke		$	1,585.80			$	1,533.70
	Brazil Coke		61.6				61.4
	India Coke		22.5				57
	Coal Logistics		114.4				119
	Corporate and Other		162.1				294.6
	Segments assets, excluding tax assets and discontinued operations		1,946.40				2,065.70
	Discontinued operations		19.3				159
	Tax assets		32.4				19.2
	Total assets		$	1,998.10			$	2,243.90
	The following table sets forth the Company’s total sales and other operating revenue by product or service:
		Years Ended December 31,
		2014				2013				2012
		(Dollars in millions)
	Coke sales	$	1,322.80			$	1,463.00			$	1,750.50
	Steam and electricity sales	65.7				65.6				62.5
	Operating and licensing fees	36.9				35.4				36.9
Coal logistics	33.9				7.2				—
Other	2.2				1				3.8
Total sales and other operating revenue	$	1,461.50			$	1,572.20			$	1,853.70
The Company evaluates the performance of its segments based on segment Adjusted EBITDA, which is defined as earnings before interest, taxes, depreciation, depletion and amortization (“EBITDA”) adjusted for asset and goodwill impairment, costs related to exiting our Coal business, sales discounts and the interest, taxes, depreciation, amortization attributable to our equity method investment. Prior to the expiration of our nonconventional fuel tax credits in November 2013, EBITDA reflects sales discounts included as a reduction in sales and other operating revenue. The sales discounts represent the sharing with customers of a portion of nonconventional fuel tax credits, which reduce our income tax expense. However, we believe our Adjusted EBITDA would be inappropriately penalized if these discounts were treated as a reduction of EBITDA since they represent sharing of a tax benefit that is not included in EBITDA. Accordingly, in computing Adjusted EBITDA, we have added back these sales discounts. Our Adjusted EBITDA also includes EBITDA attributable to our equity method investment. EBITDA and Adjusted EBITDA do not represent and should not be considered alternatives to net income or operating income under GAAP and may not be comparable to other similarly titled measures in other businesses.
Adjusted EBITDA from continuing operations equals consolidated Adjusted EBITDA less Adjusted EBITDA from discontinued operations less Legacy costs.
Adjusted EBITDA from discontinued operations equals coal business Adjusted EBITDA excluding corporate cost allocation attributable to coal, costs related to exiting our coal business and certain retained coal-related costs reclassified as Legacy costs.
Legacy costs equals royalty revenues, coal pension/other post-employment benefits, coal workers' compensation, black lung, prep. plant and certain other coal-related costs that we expect to retain after the sale of the coal business.
Management believes Adjusted EBITDA is an important measure of the operating performance of the Company's net assets and provides useful information to investors because it highlights trends in our business that may not otherwise be apparent when relying solely on GAAP measures and because it eliminates items that have less bearing on our operating performance. Adjusted EBITDA is a measure of operating performance that is not defined by GAAP, does not represent and should not be considered a substitute for net income as determined in accordance with GAAP. Calculations of Adjusted EBITDA may not be comparable to those reported by other companies.
Set forth below is additional detail as to how we use Adjusted EBITDA as a measure of operating performance, as well as a discussion of the limitations of Adjusted EBITDA as an analytical tool.
Operating Performance. Our management uses Adjusted EBITDA in a number of ways to assess our consolidated financial and operating performance, and we believe this measure is helpful to management in identifying trends in our performance. Adjusted EBITDA helps management identify controllable expenses and make decisions designed to help us meet our current financial goals and optimize our financial performance while neutralizing the impact of capital structure on financial results. Accordingly, we believe this metric measures our financial performance based on operational factors that management can impact in the short-term, namely our cost structure and expenses.
Limitations. Other companies may calculate Adjusted EBITDA differently than we do, limiting its usefulness as a comparative measure. Adjusted EBITDA also has limitations as an analytical tool and should not be considered in isolation or as a substitute for an analysis of our results as reported under GAAP. Some of these limitations include that Adjusted EBITDA:
•	does not reflect our cash expenditures, or future requirements, for capital expenditures or contractual commitments;
•	does not reflect changes in, or cash requirement for, working capital needs;
•	does not reflect our interest expense, or the cash requirements necessary to service interest on or principal payments of our debt;
•	does not reflect certain other non-cash income and expenses;
•	excludes income taxes that may represent a reduction in available cash; and includes net income (loss) attributable to noncontrolling interests.
Below is a reconciliation of Adjusted EBITDA (unaudited) to net income, which is its most directly comparable financial measure calculated and presented in accordance with GAAP:
	Year Ended December 31,
	2014				2013				2012
	(Dollars in millions)
Adjusted EBITDA attributable to SunCoke Energy, Inc.	$	150			$	173.9			$	265.6
Add: Adjusted EBITDA attributable to noncontrolling interest(1)	60.7				41.2				—
Adjusted EBITDA	$	210.7			$	215.1			$	265.6
Subtract:
Adjusted EBITDA from discontinued operations(2)	(10.0		)		(6.3		)		41.8
Legacy costs, net(3)	(17.1		)		(0.4		)		(3.9		)
Adjusted EBITDA from continuing operations	$	237.8			$	221.8			$	227.7
Subtract:
Adjustment to unconsolidated affiliate earnings(4)	3				3.2				—
Depreciation and amortization expense	96.1				77.1				65
India impairment	30.5				—				—
Interest expense, net	63.2				52.3				47.6
Income tax expense	7.4				16.4				18
Sales discounts provided to customers due to sharing of	(0.5		)		6.8				11.2
nonconventional fuel tax credits(5)
Asset impairment	16.8				—				—
Legacy costs, net(3)	17.1				0.4				3.9
Income from continuing operations	$	4.2			$	65.6			$	82
Loss (income) from discontinued operations, net of tax	(106.0		)		(15.5		)		20.5
Net (loss) income	$	(101.8	)		$	50.1			$	102.5
-1	Reflects noncontrolling interest in Indiana Harbor and the portions of the Partnership owned by public unitholders.
-2	See reconciliation of Adjusted EBITDA from discontinued operations below.
-3	Legacy costs, net includes royalty revenues and costs related to coal mining assets and liabilities expected to be retained by the Company which are not part of the disposal group, and therefore, are reported in continuing operations in Corporate and Other. See detail of these legacy costs in the table below.
-4	Reflects share of interest, taxes, depreciation and amortization related to VISA SunCoke.
-5	Sales discounts are related to nonconventional fuel tax credits, which expired in 2013. At December 31, 2013, we had $13.6 million accrued related to sales discounts to be paid to our customer at our Granite City facility. During the first quarter of 2014, we settled this obligation for $13.1 million which resulted in a gain of $0.5 million. The gain was recorded in sales and other operating revenue on our Consolidated Statement of Operations.
Below is a reconciliation of Adjusted EBITDA from discontinued operations to its closest GAAP measure:
	Year Ended December 31,
	2014				2013				2012
	(Dollars in millions)
Adjusted EBITDA from discontinued operations	$	(10.0	)		$	(6.3	)		$	41.8
Subtract:
Depreciation and depletion from discontinued operations	10.2				18.9				16
Income tax (benefit) expense from discontinued operations	(66.2		)		(9.7		)		5.3
Asset and goodwill impairment from discontinued operations	133.5				—				—
Exit costs	18.5				—				—
(Loss) income from discontinued operations, net of tax	$	(106.0	)		$	(15.5	)		$	20.5

Selected_Quarterly_Data_unaudi

Selected Quarterly Data (unaudited)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Data (unaudited)	26. Selected Quarterly Data (unaudited)
		2014												2013
		First			Second			Third			Fourth			First			Second			Third			Fourth
		Quarter			Quarter			Quarter			Quarter			Quarter			Quarter			Quarter			Quarter
		(Dollars in millions)
	Sales and other operating revenue	$	351.5		$	364.2		$	367.5		$	378.3		$	438		$	383.7		$	373.1		$	377.4
	Gross profit(1)	$	33.7		$	55.2		$	64.3		$	38.1		$	49.8		$	51.7		$	54.6		$	56.5
	Income (loss) from continuing operations(2)	$	2.2		$	(7.2	)	$	24.9		$	(15.7	)	$	11.1		$	15.5		$	15.9		$	23.1
	Loss from discontinued operations, net of income tax benefit(3)	$	(6.2	)	$	(41.2	)	$	(18.5	)	$	(40.1	)	$	(4.7	)	$	(2.8	)	$	(3.6	)	$	(4.4	)
	Net (loss) income	$	(4.0	)	$	(48.4	)	$	6.4		$	(55.8	)	$	6.4		$	12.7		$	12.3		$	18.7
	Less: Net income attributable to noncontrolling interests	$	4		$	0.7		$	10		$	9.6		$	4.3		$	7		$	6.1		$	7.7
	Net (loss) income attributable to SunCoke Energy, Inc.	$	(8.0	)	$	(49.1	)	$	(3.6	)	$	(65.4	)	$	2.1		$	5.7		$	6.2		$	11.1
	(Loss) earnings attributable to SunCoke Energy, Inc. per common share:
	Basic
	Continuing operations	$	(0.02	)	$	(0.12	)	$	(0.21	)	$	(0.38	)	$	(0.10	)	$	0.12		$	0.14		$	0.22
	Discontinued operations	$	(0.09	)	$	(0.59	)	$	(0.27	)	$	(0.60	)	$	(0.07	)	$	(0.04	)	$	(0.05	)	$	(0.06	)
	Diluted
	Continuing operations	$	(0.02	)	$	(0.12	)	$	(0.21	)	$	(0.38	)	$	(0.10	)	$	0.12		$	0.14		$	0.22
	Discontinued operations	$	(0.09	)	$	(0.59	)	$	(0.26	)	$	(0.60	)	$	(0.07	)	$	(0.04	)	$	(0.05	)	$	(0.06	)
	Cash dividend declared per share(4)	$	—		$	—		$	—		$	0.0585		$	—		$	—		$	—		$	—
	-1	Gross profit equals sales and other operating revenue less cost of products sold, operating expenses and depreciation and amortization.
	-2	Income from continuing operations includes an impairment charge of legacy coal mining assets of $15.1 million and related tax benefit of $5.8 million and $1.7 million and related tax benefit of $0.7 million during the second and fourth quarters of 2014, respectively. The Company does not expect these legacy assets to be part of the sale of our coal mining operations.
	-3	Loss from discontinued operations includes impairment charges, net of tax, of $54.0 million, $10.1 million and $17.8 million for the second, third and fourth quarters of 2014, respectively.
	-4	On October 23, 2014, the Company's Board of Directors declared our very first cash dividend of $0.0585 per share, which was paid on November 28, 2014 to shareholders of record at the close of business on November 14, 2014.

Supplemental_Condensed_Consoli

Supplemental Condensed Consolidating Financial Information	12 Months Ended
	Dec. 31, 2014
Supplemental Condensed Consolidating Financial Information [Abstract]
Supplemental Condensed Consolidating Financial Information	27. Supplemental Condensed Consolidating Financial Information
	Certain 100 percent owned subsidiaries of the Company serve as guarantors of the obligations under the Credit Agreement and $240 million Notes (“Guarantor Subsidiaries”). These guarantees are full and unconditional (subject, in the case of the Guarantor Subsidiaries, to customary release provisions as described below) and joint and several. For purposes of the following footnote, SunCoke Energy, Inc. is referred to as “Issuer.” The indenture dated July 26, 2011 among the Company, the guarantors party thereto and The Bank of New York Mellon Trust Company, N.A., governs subsidiaries designated as “Guarantor Subsidiaries.” All other consolidated subsidiaries of the Company are collectively referred to as “Non-Guarantor Subsidiaries.”
	The ability of the Partnership and Indiana Harbor to pay dividends and make loans to the Company is restricted under the partnership agreements of the Partnership and Indiana Harbor, respectively. The credit agreement governing the Partnership’s credit facility and the indenture governing the Partnership Notes contain customary provisions which would potentially restrict the Partnership’s ability to make distributions or loans to the Company under certain circumstances. For the year ended December 31, 2014, less than 25 percent of net assets were restricted.
	The guarantee of a Guarantor Subsidiary will terminate upon:
	•	a sale or other disposition of the Guarantor Subsidiary or of all or substantially all of its assets;
	•	a sale of the majority of the Capital Stock of a Guarantor Subsidiary to a third party, after which the Guarantor Subsidiary is no longer a "Restricted Subsidiary" in accordance with the indenture governing the Notes;
	•	the liquidation or dissolution of a Guarantor Subsidiary so long as no "Default" or "Event of Default," as defined under the indenture governing the Notes, has occurred as a result thereof;
	•	the designation of a Guarantor Subsidiary as an "unrestricted subsidiary" in accordance with the indenture governing the Notes
	•	the requirements for defeasance or discharge of the indentures governing the Notes having been satisfied;
	•	the release, other than the discharge through payments by a Guarantor Subsidiary, from its guarantee under the Credit Agreement or other indebtedness that resulted in the obligation of the Guarantor Subsidiary under the indenture governing the Notes.
	The following supplemental condensed combining and consolidating financial information reflects the Issuer’s separate accounts, the combined accounts of the Guarantor Subsidiaries, the combined accounts of the Non-Guarantor Subsidiaries, the combining and consolidating adjustments and eliminations and the Issuer’s consolidated accounts for the dates and periods indicated. For purposes of the following condensed combining and consolidating information, the Issuer’s investments in its subsidiaries and the Guarantor and Non-Guarantor Subsidiaries’ investments in its subsidiaries are accounted for under the equity method of accounting.
	SunCoke Energy, Inc.
	Condensed Consolidating Statement of Operations
	Year Ended December 31, 2014
	(Dollars in millions)
		Issuer				Guarantor				Non-				Combining				Total
						Subsidiaries				Guarantor				and
										Subsidiaries				Consolidating
														Adjustments
	Revenues
	Sales and other operating revenue	$	—			$	435.8			$	1,025.70			$	—			$	1,461.50
	Equity in (loss) earnings of subsidiaries	(101.3		)		56				—				45.3				—
	Other (loss) income, net	(0.3		)		1.6				9.9				—				11.2
	Total revenues	(101.6		)		493.4				1,035.60				45.3				1,472.70
	Costs and operating expenses
	Cost of products sold and operating expenses	—				354				820.1				—				1,174.10
	Selling, general and administrative expenses	13.4				34.5				28				—				75.9
	Depreciation and amortization expenses	—				25.5				70.6				—				96.1
	Asset impairment	—				16.8				—				—				16.8
	Total costs and operating expenses	13.4				430.8				918.7								1,362.90
	Operating (loss) income	(115.0		)		62.6				116.9				45.3				109.8
	Interest (income) expense, net - affiliate	—				(7.3		)		7.3				—				—
	Interest expense (income), net	26.3				(1.8		)		38.7				—				63.2
	Total interest expense (income), net	26.3				(9.1		)		46				—				63.2
	(Loss) income before income tax expense and loss from	(141.3		)		71.7				70.9				45.3				46.6
	equity method investment
	Income tax (benefit) expense	(15.2		)		24.5				(1.9		)		—				7.4
	Loss from equity method investment	—				—				35				—				35
	(Loss) income from continuing operations	(126.1		)		47.2				37.8				45.3				4.2
	Loss from discontinued operations net of income tax benefit of $66.2 million	—				(106.0		)		—				—				(106.0		)
	Net (loss) income	(126.1		)		(58.8		)		37.8				45.3				(101.8		)
	Less: Net income attributable to noncontrolling interests	—				—				24.3				—				24.3
	Net (loss) income attributable to SunCoke Energy, Inc.	$	(126.1	)		$	(58.8	)		$	13.5			$	45.3			$	(126.1	)
	Comprehensive (loss) income	$	(133.5	)		$	(65.4	)		$	37			$	52.7			$	(109.2	)
	Less: Comprehensive income attributable to noncontrolling interests	—				—				24.3				—				24.3
	Comprehensive (loss) income attributable to SunCoke Energy, Inc.	$	(133.5	)		$	(65.4	)		$	12.7			$	52.7			$	(133.5	)
	SunCoke Energy, Inc.
	Condensed Consolidating Statement of Income
	Year Ended December 31, 2013
	(Dollars in millions)
		Issuer				Guarantor				Non-				Combining				Total
						Subsidiaries				Guarantor				and
										Subsidiaries				Consolidating
														Adjustments
	Revenues
	Sales and other operating revenue	$	—			$	480.6			$	1,091.60			$	—			$	1,572.20
	Equity in earnings of subsidiaries	56.2				88.6				—				(144.8		)		—
	Other income, net	—				3.7				9.6				—				13.3
	Total revenues	56.2				572.9				1,101.20				(144.8		)		1,585.50
	Costs and operating expenses
	Cost of products sold and operating expenses	—				389.4				893.1				—				1,282.50
	Selling, general and administrative expenses	12.1				49.6				27.7				—				89.4
	Depreciation and amortization expenses	—				25.2				51.9				—				77.1
	Total costs and operating expenses	12.1				464.2				972.7				—				1,449.00
Operating income	44.1				108.7				128.5				(144.8		)		136.5
Interest (income) expense, net - affiliate	—				(7.3		)		7.3				—				—
Interest expense (income), net	37.9				(0.8		)		15.2				—				52.3
Total interest expense (income), net	37.9				(8.1		)		22.5				—				52.3
Income before income tax expense and loss from equity method investment	6.2				116.8				106				(144.8		)		84.2
Income tax (benefit) expense	(18.8		)		36.8				(1.6		)		—				16.4
Loss from equity method investment	—				—				2.2				—				2.2
Income from continuing operations	25				80				105.4				(144.8		)		65.6
Loss from discontinued operations, net of income tax benefit of $9.7 million	—				(15.5		)		—				—				(15.5		)
Net income	25				64.5				105.4				(144.8		)		50.1
Less: Net income attributable to noncontrolling interests	—				—				25.1				—				25.1
Net income attributable to SunCoke Energy, Inc.	$	25			$	64.5			$	80.3			$	(144.8	)		$	25
Comprehensive income	$	18.8			$	68.5			$	95.2			$	(138.6	)		$	43.9
Less: Comprehensive income attributable to noncontrolling interests	—				—				25.1				—				25.1
Comprehensive income attributable to SunCoke Energy, Inc.	$	18.8			$	68.5			$	70.1			$	(138.6	)		$	18.8
SunCoke Energy, Inc.
Condensed Combining and Consolidating Statement of Income
Year Ended December 31, 2012
(Dollars in millions)
	Issuer				Guarantor				Non-				Combining				Total
					Subsidiaries				Guarantor				and
									Subsidiaries				Consolidating
													Adjustments
Revenues
Sales and other operating revenue	$	—			$	564.4			$	1,289.30			$	—			$	1,853.70
Equity in earnings of subsidiaries	138.9				95.5				—				(234.4		)		—
Other income, net	—				1.5				9.5				—				11
Total revenues	138.9				661.4				1,298.80				(234.4		)		1,864.70
Costs and operating expenses
Cost of products sold and operating expenses	—				462.6				1,110.50				—				1,573.10
Selling, general and administrative expenses	10.6				42.4				26				—				79
Depreciation and amortization expenses	—				22.3				42.7				—				65
Total costs and operating expenses	10.6				527.3				1,179.20				—				1,717.10
Operating income	128.3				134.1				119.6				(234.4		)		147.6
Interest (income) expense, net - affiliate	—				(7.4		)		7.4				—				—
Interest expense (income), net	48				—				(0.4		)		—				47.6
Total interest expense (income), net	48				(7.4		)		7				—				47.6
Income before income tax expense and loss from equity method investment	80.3				141.5				112.6				(234.4		)		100
Income tax (benefit) expense	(18.5		)		13.5				23				—				18
Income from continuing operations	98.8				128				89.6				(234.4		)		82
Income from discontinued operations, net of income tax expense of $5.3 million	—				20.5				—				—				20.5
Net income	98.8				148.5				89.6				(234.4		)		102.5
Less: Net income attributable to noncontrolling interests	—				—				3.7				—				3.7
Net income attributable to SunCoke Energy, Inc.	$	98.8			$	148.5			$	85.9			$	(234.4	)		$	98.8
Comprehensive income	$	97.4			$	148.2			$	88.5			$	(233.0	)		$	101.1
Less: Comprehensive income attributable to noncontrolling interests	—				—				3.7				—				3.7
Comprehensive income attributable to SunCoke Energy, Inc.	$	97.4			$	148.2			$	84.8			$	(233.0	)		$	97.4
SunCoke Energy, Inc.
Condensed Consolidating Balance Sheet
December 31, 2014
(Dollars in millions, except per share amounts)
		Issuer				Guarantor				Non-				Combining				Total
						Subsidiaries				Guarantor				and
										Subsidiaries				Consolidating
														Adjustments
Assets
Cash and cash equivalents		$	—			$	102.4			$	36.6			$	—			$	139
Receivables		0.1				23.1				52.2				—				75.4
Inventories		—				39.2				99.9				—				139.1
Income tax receivable		28				—				6.8				(28.8		)		6
Deferred income taxes		2.6				25.6				0.8				(2.6		)		26.4
Other current assets		—				2.7				0.9				—				3.6
Current assets held for sale		—				19.3				—				—				19.3
Advances to affiliates		—				150.5				—				(150.5		)		—
Total current assets		30.7				362.8				197.2				(181.9		)		408.8
Notes receivable from affiliate		—				89				300				(389.0		)		—
Investment in Brazilian cokemaking operations		—				—				41				—				41
Equity method investment in VISA SunCoke Limited		—				—				22.3				—				22.3
Properties, plants and equipment, net		—				387.8				1,078.80				—				1,466.60
Goodwill and other intangible assets, net		—				6.9				15.1				—				22
Deferred charges and other assets		5.8				13				18.6				—				37.4
Investment in subsidiaries		718.2				494.1				—				(1,212.3		)		—
Total assets		$	754.7			$	1,353.60			$	1,673.00			$	(1,783.2	)		$	1,998.10
Liabilities and Equity
Advances from affiliate		$	73.4			$	—			$	77.1			$	(150.5	)		$	—
Accounts payable		—				29.3				81.6				—				110.9
Accrued liabilities		0.1				23.4				18.1				—				41.6
Interest payable		7.6				—				12.3				—				19.9
Income taxes payable		—				28.8				—				(28.8		)		—
Current liabilities held for sale		—				37.4				—				—				37.4
Total current liabilities		81.1				118.9				189.1				(179.3		)		209.8
Long term-debt		240				—				411.5				—				651.5
Payable to affiliate		—				300				89				(389.0		)		—
Accrual for black lung benefits		—				43.9				—				—				43.9
Retirement benefit liabilities		—				33.6				—				—				33.6
Deferred income taxes		—				320.8				3.7				(2.6		)		321.9
Asset retirement obligations		—				12.5				2.6				—				15.1
Other deferred credits and liabilities		1.9				13.8				1.2				—				16.9
Total liabilities		323				843.5				697.1				(570.9		)		1,292.70
Equity
Preferred stock, $0.01 par value. Authorized 50,000,000		—				—				—				—				—
shares; no issued and outstanding shares at
31-Dec-14
Common stock, $0.01 par value. Authorized 300,000,000		0.7				—				—				—				0.7
shares; issued 71,251,529 shares at December 31, 2014
Treasury Stock, 4,977,115 shares at December 31, 2014		(105.0		)		—				—								(105.0		)
Additional paid-in capital		543.6				176.6				501.1				(677.7		)		543.6
Accumulated other comprehensive loss		(21.5		)		(9.3		)		(12.2		)		21.5				(21.5		)
Retained earnings		13.9				342.8				213.3				(556.1		)		13.9
Total SunCoke Energy, Inc. stockholders’ equity		431.7				510.1				702.2				(1,212.3		)		431.7
Noncontrolling interests		—				—				273.7				—				273.7
Total equity		431.7				510.1				975.9				(1,212.3		)		705.4
Total liabilities and equity		$	754.7			$	1,353.60			$	1,673.00			$	(1,783.2	)		$	1,998.10
SunCoke Energy, Inc.
Condensed Consolidating Balance Sheet
December 31, 2013
(Dollars in millions, except per share amounts)
		Issuer				Guarantor				Non-				Combining				Total
						Subsidiaries				Guarantor				and
										Subsidiaries				Consolidating
														Adjustments
Assets
Cash and cash equivalents		$	—			$	184.7			$	48.9			$	—			$	233.6
Receivables		—				47.2				38.1				—				85.3
Inventories		—				37.4				91.2				—				128.6
Income taxes receivable		39.9				—				13.4				(46.7		)		6.6
Deferred income taxes		9.4				11.8				0.8				(9.4		)		12.6
Advances to affiliate		48.2				33.6				—				(81.8		)		—
Other current assets		—				1.3				1				—				2.3
Current assets held for sale		—				12.9				—				—				12.9
Interest receivable from affiliate		—				7.3				—				(7.3		)		—
Total current assets		97.5				336.2				193.4				(145.2		)		481.9
Notes receivable from affiliate		—				89				300				(389.0		)		—
Investment in Brazilian cokemaking operations		—				—				41				—				41
Equity method investment in VISA SunCoke Limited		—				—				56.8				—				56.8
Properties, plants and equipment, net		—				415.7				1,043.20				—				1,458.90
Goodwill and other intangible assets, net		—				7.5				16				—				23.5
Deferred charges and other assets		11.7				14.3				9.7				—				35.7
Long-term assets held for sale		—				146.1				—				—				146.1
Investment in subsidiaries		963.3				723.8				—				(1,687.1		)		—
Total assets		$	1,072.50			$	1,732.60			$	1,660.10			$	(2,221.3	)		$	2,243.90
Liabilities and Equity
Advances from affiliate		$	—			$	48.2			$	33.6			$	(81.8	)		$	—
Accounts payable		—				32.9				105.5				—				138.4
Accrued liabilities		0.5				42.6				16.4				—				59.5
Short-term debt, including current portion of long-term debt		1				—				40				—				41
Interest payable		13.6				—				4.6				—				18.2
Income taxes payable		—				46.7				—				(46.7		)		—
Interest payable to affiliate		—				—				7.3				(7.3		)		—
Current liabilities held for sale		—				25.9				—				—				25.9
Total current liabilities		15.1				196.3				207.4				(135.8		)		283
Long-term debt		498.4				—				149.7				—				648.1
Payable to affiliate		—				300				89				(389.0		)		—
Accrual for black lung benefits		—				32.4				—				—				32.4
Retirement benefit liabilities		—				34.8				—				—				34.8
Deferred income taxes		—				362				2.1				(9.4		)		354.7
Asset retirement obligations		—				8.5				2.4				—				10.9
Other deferred credits and liabilities		1.6				12.2				0.6				—				14.4
Long-term liabilities held for sale		—				33.3				—				—				33.3
Total liabilities		515.1				979.5				451.2				(534.2		)		1,411.60
Equity
Preferred stock, $0.01 par value. Authorized 50,000,000		—				—				—				—				—
shares; no issued and outstanding shares at
31-Dec-13
Common stock, $0.01 par value. Authorized 300,000,000		0.7				—				—				—				0.7
shares; issued 70,892,140 shares at
December 31, 2013
Treasury stock, 1,255,355 shares at December 31, 2013		(19.9		)		—				—				—				(19.9		)
Additional paid-in capital		446.9				354.2				745.6				(1,099.8		)		446.9
Accumulated other comprehensive income		(14.1		)		(2.7		)		(11.4		)		14.1				(14.1		)
Retained earnings		143.8				401.6				199.8				(601.4		)		143.8
Total SunCoke Energy, Inc. stockholders’ equity		557.4				753.1				934				(1,687.1		)		557.4
Noncontrolling interests		—				—				274.9				—				274.9
Total equity		557.4				753.1				1,208.90				(1,687.1		)		832.3
Total liabilities and equity		$	1,072.50			$	1,732.60			$	1,660.10			$	(2,221.3	)		$	2,243.90
SunCoke Energy, Inc.
Condensed Consolidating Statement of Cash Flows
Year Ended December 31, 2014
(Dollars in millions)
	Issuer				Guarantor				Non-				Combining				Total
					Subsidiaries				Guarantor				and
									Subsidiaries				Consolidating
													Adjustments
Cash Flows from Continuing Operating Activities:
Net (loss) income	$	(126.1	)		$	(58.8	)		$	37.8			$	45.3			$	(101.8	)
Adjustments to reconcile net income to net cash provided by continuing operating activities:
Loss from discontinued operations, net of tax	—				106				—				—				106
Asset impairment	—				16.8				—				—				16.8
Depreciation and amortization expense	—				25.5				70.6				—				96.1
Deferred income tax expense (benefit)	6.8				(14.3		)		1.5				—				(6.0		)
Payments in excess of expense for retirement plans	—				(8.1		)		—				—				(8.1		)
Share-based compensation expense	9.8				—				—				—				9.8
Equity in loss (earnings) of subsidiaries	101.3				(56.0		)		—				(45.3		)		—
Excess tax benefit from share-based awards	(0.4		)		0.1				—				—				(0.3		)
Loss from equity method investment	—				—				35				—				35
Loss on extinguishment/modification of debt	—				—				15.4				—				15.4
Changes in working capital pertaining to continuing operating activities (net of acquisitions):
Receivables	(0.1		)		24.1				(14.1		)		—				9.9
Inventories	—				(1.8		)		(8.7		)		—				(10.5		)
Accounts payable	—				(3.6		)		(23.9		)		—				(27.5		)
Accrued liabilities	(0.5		)		(19.1		)		1.7				—				(17.9		)
Interest payable	(6.0		)		7.3				0.4				—				1.7
Income taxes	12.3				(17.9		)		6.6				—				1
Accrual for black lung benefits	—				11.5				—								11.5
Other	6.1				0.2				(7.4		)		—				(1.1		)
Net cash provided by continuing operating activities	3.2				11.9				114.9				—				130
Cash Flows from Continuing Investing Activities:
Capital expenditures	—				(12.6		)		(105.7		)		—				(118.3		)
Net cash used in continuing investing activities	—				(12.6		)		(105.7		)		—				(118.3		)
Cash Flows from Continuing Financing Activities:
Proceeds from issuance of common units of SunCoke	—				—				90.5				—				90.5
Energy Partners, L.P., net of offering costs
Proceeds from issuance of long-term debt	—				—				268.1				—				268.1
Repayment of long-term debt	—				—				(276.5		)		—				(276.5		)
Debt issuance costs	—				—				(5.8		)		—				(5.8		)
Proceeds from revolving facility	—				—				40				—				40
Repayment of revolving facility	—				—				(80.0		)		—				(80.0		)
Cash distributions to noncontrolling interests	—				—				(32.3		)		—				(32.3		)
Shares repurchased	(85.1		)		—				—				—				(85.1		)
Proceeds from exercise of stock options	2.9				—				—				—				2.9
Excess tax benefit from share-based awards	0.3				—				—				—				0.3
Dividends paid	(3.8		)		—				—				—				(3.8		)
Net increase (decrease) in advances from affiliate	82.5				(57.0		)		(25.5		)		—				—
Net cash used in continuing financing activities	(3.2		)		(57.0		)		(21.5		)		—				(81.7		)
Net decrease in cash and cash equivalents from continuing operations	—				(57.7		)		(12.3		)		—				(70.0		)
Cash Flows from Discontinued Operations:
Cash flows from discontinued operations - operating activities	—				(17.7		)		—				—				(17.7		)
Cash flows from discontinued operations - investing activities	—				(6.9		)		—				—				(6.9		)
Net decrease in cash and cash equivalents from discontinued operations	—				(24.6		)		—				—				(24.6		)
Net decrease in cash and cash equivalents	—				(82.3		)		(12.3		)		—				(94.6		)
Cash and cash equivalents at beginning of year	—				184.7				48.9				—				233.6
Cash and cash equivalents at end of year	$	—			$	102.4			$	36.6			$	—			$	139
SunCoke Energy, Inc.
Condensed Consolidating Statement of Cash Flows
Year Ended December 31, 2013
(Dollars in millions)
		Issuer				Guarantor				Non-				Combining				Total
						Subsidiaries				Guarantor				and
										Subsidiaries				Consolidating
														Adjustments
Cash Flows from Continuing Operating Activities:
Net income		$	25			$	64.5			$	105.4			$	(144.8	)		$	50.1
Adjustments to reconcile net income to net cash (used in) provided by continuing operating activities:
Loss from discontinued operations, net of tax		—				15.5				—				—				15.5
Depreciation and amortization expense		—				25.2				51.9				—				77.1
Deferred income tax (benefit) expense		—				0.5				—				—				0.5
Payments in excess of expense for retirement plans		—				(5.3		)		(0.1		)		—				(5.4		)
Share-based compensation expense		7.6				—				—				—				7.6
Equity in earnings of subsidiaries		(56.2		)		(88.6		)		—				144.8				—
Loss from equity method investment		—				—				2.2				—				2.2
Changes in working capital pertaining to continuing operating activities (net of acquisitions):
Receivables		—				(23.6		)		6.5				—				(17.1		)
Inventories		—				14.8				16.1				—				30.9
Accounts payable		(0.6		)		4.2				21.6				—				25.2
Accrued liabilities		—				(6.1		)		(16.7		)		—				(22.8		)
Interest payable		(2.1		)		(7.3		)		11.9				—				2.5
Income taxes		(23.5		)		26.4				(13.0		)		—				(10.1		)
Accrual for black lung benefits		—				(2.4		)		—								(2.4		)
Other		7.1				4.1				(8.3		)		—				2.9
Net cash (used in) provided by continuing operating activities		(42.7		)		21.9				177.5				—				156.7
Cash Flows from Continuing Investing Activities:
Capital expenditures		—				(19.8		)		(112.5		)		—				(132.3		)
Acquisition of businesses, net of cash acquired		—				—				(113.3		)		—				(113.3		)
Equity method investment in VISA SunCoke Limited		—				—				(67.7		)		—				(67.7		)
Net cash used in continuing investing activities		—				(19.8		)		(293.5		)		—				(313.3		)
Cash Flows from Continuing Financing Activities:
Proceeds from issuance of common units of SunCoke		—				—				237.8				—				237.8
Energy Partners, L.P., net of offering costs
Proceeds from issuance of long-term debt		—				—				150				—				150
Repayment of long-term debt		—				—				(225.0		)		—				(225.0		)
Debt issuance costs		(1.6		)		—				(5.3		)		—				(6.9		)
Proceeds from revolving facility		—				—				40				—				40
Cash distributions to noncontrolling interests		—				—				(17.8		)		—				(17.8		)
Shares repurchased		(10.9		)		—				—				—				(10.9		)
Proceeds from exercise of stock options		2.5				—				—				—				2.5
Net increase (decrease) in advances from affiliate		52.7				(5.6		)		(47.1		)		—				—
Net cash provided by (used in) continuing financing activities		42.7				(5.6		)		132.6				—				169.7
Net (decrease) increase in cash and cash equivalents from continuing operations		—				(3.5		)		16.6				—				13.1
Cash Flows from Discontinued Operations:
Cash flows from discontinued operations - operating activities		—				(5.4		)		—				—				(5.4		)
Cash flows from discontinued operations - investing activities		—				(13.3		)		—				—				(13.3		)
Net decrease in cash and cash equivalents from discontinued operations		—				(18.7		)		—				—				(18.7		)
Net (decrease) increase in cash and cash equivalents		—				(22.2		)		16.6				—				(5.6		)
Cash and cash equivalents at beginning of year		—				206.9				32.3				—				239.2
Cash and cash equivalents at end of year		$	—			$	184.7			$	48.9			$	—			$	233.6
SunCoke Energy, Inc.
Condensed Combining and Consolidating Statement of Cash Flows
December 31, 2012
(Dollars in millions)
		Issuer				Guarantor				Non-				Combining				Total
						Subsidiaries				Guarantor				and
										Subsidiaries				Consolidating
														Adjustments
Cash Flows from Continuing Operating Activities:
Net income		$	98.8			$	148.5			$	89.6			$	(234.4	)		$	102.5
Adjustments to reconcile net income to net cash (used in) provided by continuing operating activities:
Income from discontinued operations, net of tax		—				(20.5		)		—				—				(20.5		)
Depreciation and amortization expense		—				22.3				42.7				—				65
Deferred income tax (benefit) expense		(1.0		)		(7.9		)		39.3				—				30.4
Payments in excess of expense for retirement plans		—				(9.6		)		—				—				(9.6		)
Share-based compensation expense		6.7				—				—				—				6.7
Equity in earnings (loss) of subsidiaries		(138.9		)		(95.5		)		—				234.4				—
Changes in working capital pertaining to continuing operating activities (net of acquisitions):
Receivables		—				(7.8		)		2.1				—				(5.7		)
Inventories		—				35.5				22.3				—				57.8
Accounts payable		0.5				(55.9		)		(13.8		)		—				(69.2		)
Accrued liabilities		—				12.8				(1.8		)		—				11
Interest payable		(0.2		)		7.3				(7.3		)		—				(0.2		)
Income taxes		(17.2		)		(1.1		)		0.7				—				(17.6		)
Accrual for black lung benefits		—				1.3				—								1.3
Other		(4.9		)		(17.0		)		14				—				(7.9		)
Net cash (used in) provided by continuing operating activities		(56.2		)		12.4				187.8				—				144
Cash Flows from Continuing Investing Activities:
Capital expenditures		—				(20.9		)		(33.3		)		—				(54.2		)
Net cash used in continuing investing activities		—				(20.9		)		(33.3		)		—				(54.2		)
Cash Flows from Continuing Financing Activities:
Repayment of long-term debt		(3.3		)		—				—				—				(3.3		)
Cash distributions to noncontrolling interests		—				—				(2.3		)		—				(2.3		)
Shares repurchased		(9.4		)		—				—				—				(9.4		)
Proceeds from exercise of stock options		4.7				—				—				—				4.7
Net increase (decrease) in advances from affiliate		64.2				73.8				(138.0		)		—				—
Net cash provided by (used in) continuing financing activities		56.2				73.8				(140.3		)		—				(10.3		)
Net increase in cash and cash equivalents from continuing operations		—				65.3				14.2				—				79.5
Cash Flows from Discontinued Operations:
Cash flows from discontinued operations - operating activities		—				62.1				—				—				62.1
Cash flows from discontinued operations - investing activities		—				(29.9		)		—				—				(29.9		)
Net increase in cash and cash equivalents from discontinued operations		—				32.2				—				—				32.2
Net increase in cash and cash equivalents		—				97.5				14.2				—				111.7
Cash and cash equivalents at beginning of year		—				109.4				18.1				—				127.5
Cash and cash equivalents at end of year		$	—			$	206.9			$	32.3			$	—			$	239.2

Subsequent_Events

Subsequent Events	12 Months Ended
	Dec. 31, 2014
Subsequent Events [Abstract]
Subsequent Events	28. Subsequent Events
	On January 13, 2015, the Company contributed a 75 percent interest in the Granite City cokemaking facility to the Partnership for a total transaction value of $245.0 million (the "Granite City Dropdown"). The remaining 25 percent interest will continue to be owned by the Company. The total transaction value of $245.0 million included $50.7 million of Partnership common units issued to the Company and approximately $1.0 million of general partner interests to maintain the general partner’s 2.0 percent interest in the Partnership. In addition, the Partnership assumed and repaid $135.0 million of our Notes as well as $5.6 million of accrued interest and the applicable redemption premium of $7.7 million. The Partnership withheld the remaining transaction value of $45.0 million to pre-fund our obligation to the Partnership for the anticipated cost of the environmental remediation project at Haverhill. The Partnership funded the redemption of the Notes with net proceeds from a private placement of $200.0 million add-on 7.375 percent Partnership Notes due in 2020. The Partnership will account for this dropdown as an equity transaction. Subsequent to the Granite City Dropdown, we own the general partner of the Partnership, which consists of 2.0 percent ownership interest and incentive distribution rights, and a 56.1 percent limited partner interest in the Partnership. The remaining 41.9 percent limited partner interest in the Partnership is held by public unitholders.
	In January 2015, as part of our coal rationalization plan, we executed an additional reduction in force in our discontinued coal mining business, terminating approximately 150 employees. Severance costs related to this reduction in force were recorded in 2014 as discussed in Note 3.
	On January 28, 2015, the Company entered into an share repurchase agreement for the repurchase of $20.0 million of our common stock by the end of March 2015, leaving $55.0 million available under the previously approved repurchase program. The actual number of shares repurchased will be based on the volume-weighted average share price of our common stock less a pre-determined discount during the term of the agreement.
	On February 19, 2015, the Company's Board of Directors declared a dividend of $0.0585 per share, which will be paid on March 26, 2015 to shareholders of record at the close of business on March 5, 2015.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Use of Estimates	Use of Estimates
	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual amounts could differ from these estimates.
Reclassifications	Reclassifications
	Certain amounts in the prior period consolidated financial statements have been reclassified to conform to the current year presentation.
Currency Translation	Currency Translation
	The functional currency of the Company’s Brazilian operations and India joint venture are the Brazilian real and Indian rupee, respectively. The Company’s foreign operations translate their assets and liabilities into U.S. dollars at the current exchange rates in effect at the end of the fiscal period. The gains or losses that result from this process are shown as cumulative translation adjustments within accumulated other comprehensive loss in the Consolidated Balance Sheets. The revenue and expense accounts of foreign operations are translated into U.S. dollars at the average exchange rates that prevailed during the period.
	Some transactions of the Company’s Brazilian operations and India joint venture are conducted in currencies different from their functional currency. Gains and losses from these foreign currency transactions are included in income as they occur. Our share of equity method losses in India resulting from foreign currency transactions was $0.3 million and $1.5 million for the year ended December 31, 2014 and 2013, respectively. The gains and losses from our Brazilian operations were not material to the results of operations during the years ended December 31, 2014, 2013 and 2012.
Revenue Recognition	Revenue Recognition
	The Company sells metallurgical coal and coke as well as steam and electricity and also provides coal blending and handling services to third-party customers. The Company also receives fees for operating the cokemaking plant in Brazil and for the licensing of its proprietary technology for use at this facility as well as reimbursement of substantially all of its operating costs. Revenues related to the sale of products are recognized when title passes, while service revenues are recognized when services are provided as defined by customer contracts. Licensing fees, which are determined on a per ton basis, are recognized when coke is produced in accordance with the contract terms. Title passage generally occurs when products are shipped or delivered in accordance with the terms of the respective sales agreements. Revenues are not recognized until sales prices are fixed or determinable and collectability is reasonably assured.
	Substantially all of the coke produced by the Company is sold pursuant to long-term contracts with its customers. The Company evaluates each of its contracts to determine whether the arrangement contains a lease under the applicable accounting standards. If the specific facts and circumstances indicate that it is remote that parties other than the contracted customer will take more than a minor amount of the coke that will be produced by the property, plant and equipment during the term of the coke supply agreement, and the price that the customer is paying for the coke is neither contractually fixed per unit nor equal to the current market price per unit at the time of delivery, then the long-term contract is deemed to contain a lease. The lease component of the price of coke represents the rental payment for the use of the property, plant and equipment, and all such payments are accounted for as contingent rentals as they are only earned by the Company when the coke is delivered and title passes to the customer.
Cash Equivalents	Cash Equivalents
	The Company considers all highly liquid investments with a remaining maturity of three months or less at the time of purchase to be cash equivalents. These cash equivalents consist principally of time deposits and money market investments.
Inventories	Inventories
	Inventories are valued at the lower of cost or market. Cost is determined using the first-in, first-out method, except for the Company’s materials and supplies inventory, which are determined using the average-cost method.
	The Company utilizes the selling prices under its long-term coke supply contracts to record lower of cost or market inventory adjustments.
Properties, Plants and Equipment	Properties, Plants and Equipment
	Plants and equipment are depreciated on a straight-line basis over their estimated useful lives. Coke and energy plant, machinery and equipment are depreciated over 25 to 30 years. Coal logistics plant and equipment are depreciated over 15 to 20 years. All depreciation and amortization is excluded from cost of products sold and operating expenses and presented separately on the Consolidated Statements of Operations. Gains and losses on the disposal or retirement of fixed assets are reflected in earnings when the assets are sold or retired. Amounts incurred that extend an asset’s useful life, increase its productivity or add production capacity are capitalized. The Company had capitalized interest costs related to its environmental remediation project (see Note 17) of $3.2 million, $1.0 million and $0.1 million for 2014, 2013 and 2012, respectively. Direct costs, such as outside labor, materials, internal payroll and benefits costs, incurred during the construction of a new facility are capitalized; indirect costs are not capitalized. Normal repairs and maintenance costs are expensed as incurred.
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets
	Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the assets may not be recoverable. Such events and circumstances include, among other factors: operating losses; unused capacity; market value declines; changes in the expected physical life of an asset; technological developments resulting in obsolescence; changes in demand for our products or in end-use goods manufactured by others utilizing our products as raw materials; changes in our business plans or those of our major customers, suppliers or other business partners; changes in competition and competitive practices; uncertainties associated with the U.S. and world economies; changes in the expected level of capital, operating or environmental remediation project expenditures; and changes in governmental regulations or actions.
	A long-lived asset, or group of assets, is considered to be impaired when the undiscounted net cash flows expected to be generated by the asset are less than its carrying amount. Such estimated future cash flows are highly subjective and are based on numerous assumptions about future operations and market conditions. The impairment recognized is the amount by which the carrying amount exceeds the fair market value of the impaired asset, or group of assets. It is also difficult to precisely estimate fair market value because quoted market prices for our long-lived assets may not be readily available. Therefore, fair market value is generally based on the present values of estimated future cash flows using discount rates commensurate with the risks associated with the assets being reviewed for impairment. The Company recorded impairment charges in 2014 on certain long-lived assets, which are discussed in Note 3 and Note 24.
	Assets held for sale are measured at the lower of their carrying values or fair value less costs to sell.
Goodwill and Other Intangibles	All other intangible assets have finite useful lives and are amortized over their useful lives in a manner that reflects the pattern in which the economic benefit of the intangible asset is consumed.
	Goodwill and Other Intangibles
	Goodwill, which represents the excess of the purchase price over the fair value of net assets acquired, is tested for impairment at least annually during the fourth quarter.
Investment in Brazilian Cokemaking Operations	Investment in Brazilian Cokemaking Operations
	SunCoke Energy’s investment in preferred shares of the company that owns the cokemaking facility in Vitória, Brazil, that SunCoke Energy operates under licensing and operating agreements, is accounted for at cost. Income received by SunCoke Energy from this investment, which is in the form of a dividend, is contingent upon achieving certain minimum production levels at the facility and payment is guaranteed by the parent company of the plant’s owner, which is a lessee of the facility. Accordingly, the Company recognizes income from this investment in other income on the Consolidated Statement of Operations when certain required production levels have been met and the amount is deemed collectible, typically in the fourth quarter.
Derivative Financial Instruments	Derivative Financial Instruments
	The Company utilizes derivative financial instruments to hedge against the risk of adverse movements in interest rates and foreign currency fluctuations. Our corporate policy prohibits the use of derivative instruments for trading or speculative purposes, and we have procedures in place to monitor and control their use. See Note 24.
	Cash received or paid upon settlement of derivative financial instruments is classified in the same category as the cash flows from items being hedged on the Consolidated Statements of Cash Flows.
Income Taxes	Income Taxes
	Deferred tax asset and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those differences are projected to be recovered or settled.
	The Company recognizes uncertain tax positions in its financial statements when minimum recognition threshold and measurement attributes are met in accordance with current accounting guidance. Unrecognized tax benefits and accruals for interest and penalties are included in other deferred credits and liabilities on the Consolidated Balance Sheets. The Company recognizes interest related to unrecognized tax benefits in interest expense and penalties in income tax expense on the Consolidated Statements of Operations.
Retirement Benefit Liabilities	Retirement Benefit Liabilities
	The funded status of defined benefit and postretirement benefit plans is fully recognized on the Consolidated Balance Sheets. It is determined by the difference between the fair value of plan assets and the benefit obligation, with the benefit obligation represented by the projected benefit obligation for defined benefit plans and the accumulated postretirement benefit obligation for postretirement benefit plans. Actuarial gains (losses) and prior service (benefits) costs which have not yet been recognized in net income are recognized as a credit (charge) to accumulated other comprehensive loss. The credit (charge) to accumulated other comprehensive loss, which is reflected net of related tax effects, is subsequently recognized in net income when amortized as a component of defined benefit plans and postretirement benefit plans expense. In addition, the credit (charge) may also be recognized in net income as a result of a plan curtailment or settlement.
Asset Retirement Obligations	Asset Retirement Obligations
	The fair value of a liability for an asset retirement obligation is recognized in the period in which it is incurred if a reasonable estimate of fair value can be made. The associated asset retirement costs are capitalized as part of the carrying amount of the asset and depreciated over its remaining estimated useful life. The Company’s asset retirement obligations primarily relate to costs associated with restoring land to its original state.
Shipping and Handling Costs	Shipping and Handling Costs
	Shipping and handling costs are included in cost of products sold and operating expenses.
Share-based Compensation	Share-based Compensation
	We measure the cost of employee services in exchange for an award of equity instruments based on the grant-date fair value of the award. The total cost is reduced by estimated forfeitures over the awards’ vesting period and the cost is recognized over the requisite service period. Forfeiture estimates are reviewed on an annual basis.
Fair Value Measurements	Fair Value Measurements
	The Company determines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. As required, the Company utilizes valuation techniques that maximize the use of observable inputs (levels 1 and 2) and minimize the use of unobservable inputs (level 3) within the fair value hierarchy included in current accounting guidance. The Company generally applies the “market approach” to determine fair value. This method uses pricing and other information generated by market transactions for identical or comparable assets and liabilities. Assets and liabilities are classified within the fair value hierarchy based on the lowest level (least observable) input that is significant to the measurement in its entirety.
Recently Issued Pronouncements	Recently Issued Pronouncements
	In January 2015, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update (“ASU”) 2015-01, "Income Statement—Extraordinary and Unusual Items (Subtopic 225-20): Simplifying Income Statement Presentation by Eliminating the Concept of Extraordinary Items". ASU 2015-01 eliminates the concept of extraordinary items from GAAP. It is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015, with early adoption permitted. The Company does not expect this ASU to have a material effect on the Company's financial condition, results of operations, or cash flows.
	In November 2014, the FASB issued ASU 2014-16, "Derivatives and Hedging (Topic 815): Determining Whether the Host Contract in a Hybrid Financial Instrument Issued in the Form of a Share is More Akin to Debt or to Equity". ASU 2014-16 provides guidance to entities about how to determine the nature of the host contract by considering all terms and features of the hybrid financial instrument. It is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015, with early adoption permitted. The Company does not expect this ASU to have a material effect on the Company's financial condition, results of operations, or cash flows.
	In November 2014, the FASB issued ASU 2014-17, "Business Combinations (Topic 805): Pushdown Accounting". ASU 2014-17 provides guidance on whether and at what threshold an acquired entity can apply pushdown accounting in its separate financial statements. It is effective on November 18, 2014. The Company does not expect this ASU to have a material effect on the Company's financial condition, results of operations, or cash flows.
	In August 2014, the FASB issued ASU 2014-15, "Presentation of Financial Statements-Going Concern". This ASU is intended to define management's responsibility to evaluate whether there is substantial doubt about an organization's ability to continue as a going concern and to provide related footnote disclosures. It is effective for annual periods beginning after December 15, 2016, with early adoption permitted. The Company does not expect this ASU to have a material effect on the Company's financial condition, results of operations, and cash flows.
	In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers,” which provides guidance for revenue recognition. Under this ASU, an entity is required to recognize revenue upon transfer of promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services.  The guidance also requires additional disclosure about the nature, amount, timing, and uncertainty of revenue and cash flows arising from the customer contracts, including significant judgments and changes in judgments and assets recognized from costs incurred to obtain or fulfill a contract. This ASU is effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. The Company is currently reviewing the provisions of ASU 2014-09 but does not expect it to have a material effect on the Company's financial condition, results of operations, and cash flows.
	In April 2014, the FASB issued ASU 2014-08, “Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity." ASU 2014-08 raises the threshold for a disposal to qualify as a discontinued operation and requires new disclosures of both discontinued operations and certain other disposals that do not meet the definition of a discontinued operation. This ASU is effective for annual periods beginning on or after December 15, 2014 with early adoption permitted. The application of this guidance is prospective from the date of adoption and applies only to disposals (or new classifications to held for sale) that have not been reported as discontinued operations in previously issued financial statements. The Company early adopted this ASU during the third quarter of 2014.

Coal_Impairment_Charges_and_Di1

Coal Impairment Charges and Discontinued Operations (Tables)	12 Months Ended
	Dec. 31, 2014
Discontinued Operations and Disposal Groups [Abstract]
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]	Summarized below is the major financial information of our coal business presented as discontinued operations in our Consolidated Statements of Operations:
		Years Ended December 31,
		2014			2013			2012
		(Dollars in millions)
	Revenues
	Total revenues	$	31.1		$	62.2		$	49.4
	Costs and operating expenses
	Cost of products sold and operating expenses	38.8			65.5			4.5
	Selling, general and administrative expenses	20.8			3			3.1
	Depreciation, depletion and amortization	10.2			18.9			16
	Asset and goodwill impairment	133.5			—			—
	Pre-tax (loss) income from discontinued operations	(172.2		)	(25.2		)	25.8
	Income tax benefit (expense)	66.2			9.7			(5.3		)
	(Loss) income from discontinued operations, net of tax	$	(106.0	)	$	(15.5	)	$	20.5
	Summarized below is the major financial information of our coal business presented as held for sale on our Consolidated Balance Sheets:
		December 31,
		2014			2013
		(Dollars in millions)
	Assets
	Receivables	$	2.8		$	6.2
	Inventories	8.8			6.7
	Properties, plants and equipment, net	31.1			—
	Lease and mineral rights, net	18.6			—
	Other current assets	3.5			—
	Valuation allowance	(45.5		)	—
	Total current assets held for sale	19.3			12.9
	Properties, plants and equipment, net	—			85.2
	Lease and mineral rights, net	—			52.8
	Goodwill and other intangible assets, net	—			6
	Other assets	—			2.1
	Total assets held for sale	$	19.3		$	159
	Liabilities
	Accounts payable	$	10.4		$	15.9
	Accrued liabilities	19.9			10
	Asset retirement obligations	7.1			—
	Total current liabilities held for sale	37.4			25.9
	Deferred income taxes	—			21.9
	Asset retirement obligations	—			7
	Other deferred credits and liabilities	—			4.4
	Total liabilities held for sale	$	37.4		$	59.2

DropDown_Transaction_Tables

Drop-Down Transaction (Tables)	12 Months Ended
	Dec. 31, 2014
Business Combinations [Abstract]
Changes in Company's Ownership Interest in Les than Wholly Owned Subsidiary	The table below summarizes the effects of the changes in the Company’s ownership interest in Haverhill and Middletown on SunCoke’s equity.
		Year Ended December 31, 2014
		(Dollars in millions)
	Net loss attributable to SunCoke Energy, Inc.	$	(126.1	)
	Transfer from noncontrolling interest from change in SunCoke Energy, Inc. equity for the contribution of 33.0 percent interest in Haverhill and Middletown	83.7
	Change from net loss attributable to SunCoke Energy, Inc. and transfers from noncontrolling interest	$	(42.4	)

Acquisitions_Tables

Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2014
Business Combinations [Abstract]
Fair value of the assets acquired and liabilities assumed at the acquisition date	The following table summarizes the consideration paid for Lake Terminal and the fair value of the assets acquired at the acquisition date (dollars in millions):
	Consideration:
	Cash	$	28.6
	Recognized amounts of identifiable assets acquired and liabilities assumed:
	Plant, property and equipment	25.9
	Inventory	2.7
	Total	$	28.6
	The following table summarizes the consideration paid for KRT and the fair value of assets acquired and liabilities assumed at the acquisition date (dollars in millions):
	Consideration:
	Cash	$	84.7
	Recognized amounts of identifiable assets acquired and liabilities assumed:
	Current assets	5.2
	Plant, property and equipment	67.2
	Intangible assets	7.9
	Current liabilities	(3.7		)
	Other long-term liabilities	(0.1		)
	Total identifiable net assets assumed	76.5
	Goodwill	8.2
	Total	$	84.7

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
The components of income before income tax expense	The components of income from continuing operations before income tax expense are as follows:
		Years Ended December 31,
		2014			2013				2012
		(Dollars in millions)
	Domestic	$	35.2		$	71.7			$	92.2
	Foreign	11.4			12.5				7.8
	Total	$	46.6		$	84.2			$	100
Components of income tax expense	The components of income tax expense from continuing operations are as follows:
		Years Ended December 31,
		2014			2013				2012
		(Dollars in millions)
	Income taxes currently payable (receivable):
	U.S. federal	$	8		$	9.7			$	(16.2	)
	State	2.4			3.4				1.1
	Foreign	3			2.8				2.7
	Total taxes currently payable (receivable)	13.4			15.9				(12.4		)
	Deferred tax (benefit):
	U.S. federal	(7.5		)	(5.7		)		31
	State	1.5			6.2				(0.6		)
	Total deferred tax	(6.0		)	0.5				30.4
	Total	$	7.4		$	16.4			$	18
Reconciliation of income tax expense	The reconciliation of the income tax expense at the U.S. statutory rate to the income tax expense from continuing operations is as follows:
		Years Ended December 31,
		2014						2013						2012
		(Dollars in millions)
	Income tax expense at 35 percent U.S. statutory rate	$	16.3		35	%		$	29.5			35	%	$	35		35	%
	Increase (reduction) in income taxes resulting from:
	Income attributable to noncontrolling interests(1)	(8.7		)	(18.6	)%		(8.9		)		(10.6	)%	(1.3		)	(1.3	)%
	Nonconventional fuel credit	—			—	%		(9.5		)		(11.3	)%	(16.0		)	(16.0	)%
	State and other income taxes, net of federal income tax effects	2.9			6.2	%		5.2				6.2	%	0.3			0.3	%
	Return-to-provision adjustments	(1.8		)	(4.0	)%		(0.9		)		(1.1	)%	(1.1		)	(1.1	)%
	Change in valuation allowance(2)	11.1			23.7	%		0.9				1.1	%	(0.1		)	—	%
	Impact of tax sharing agreement	(0.8		)	(1.7	)%		0.4				0.5	%	—			—	%
	Domestic production activity deduction	(0.7		)	(1.4	)%		(0.5		)		(0.6	)%	(0.3		)	(0.3	)%
	Investment in Subsidiary(2)	(11.9		)	(25.5	)%		—				—	%	—			—	%
	Other	1			2.1	%		0.2				0.3	%	1.5			1.5	%
		$	7.4		15.8	%		$	16.4			19.5	%	$	18		18.1	%
	-1	No income tax expense is reflected in the Consolidated Statements of Operations for partnership income attributable to noncontrolling interests.
	-2	On December 22, 2014, SunCoke executed a definitive agreement to sell 100 percent of its interest in the entities that made up the Harold Keene Coal Companies. This required SunCoke to record a deferred tax asset of $11.9 million related to the outside basis difference on the Harold Keene investment. This deferred tax asset was offset by a $9.8 million valuation allowance.
Tax effects of temporary differences that comprise the net deferred income tax liability	The tax effects of temporary differences that comprise the net deferred income tax liability from continuing operations are as follows:
		December 31,
		2014			2013
		(Dollars in millions)
	Deferred tax assets:
	Retirement benefit liabilities	$	14.6		$	13.4
	Black lung benefit liabilities	16.8			12.5
	Share-based compensation	6.9			5
	Federal tax credit carryforward	19.8			19.3
	State tax credit carryforward, net of federal income tax effects	9.2			8.6
	State net operating loss carryforward, net of federal income tax effects	5.4			5.3
	Other liabilities not yet deductible	18.7			9.8
	Investment in subsidiaries	11.8			—
	Total deferred tax assets	103.2			73.9
	Less valuation allowance	(14.7		)	(3.3		)
	Deferred tax asset, net	88.5			70.6
	Deferred tax liabilities:
	Properties, plants and equipment	(84.3		)	(118.1		)
	Investment in partnerships	(299.7		)	(294.6		)
	Total deferred tax liabilities	(384.0		)	(412.7		)
	Net deferred tax liability	$	(295.5	)	$	(342.1	)
Net deferred income tax liability classified in consolidated balance sheets	The net deferred income tax liability from continuing operations was classified in the consolidated balance sheets as follows:
		December 31,
		2014			2013
		(Dollars in millions)
	Current asset	$	26.4		$	12.6
	Noncurrent liability	(321.9		)	(354.7		)
	Net deferred tax liability	$	(295.5	)	$	(342.1	)

Inventories_Tables

Inventories (Tables)	12 Months Ended
	Dec. 31, 2014
Inventory Disclosure [Abstract]
Components of inventories	These components of inventories were as follows:
		December 31,
		2014		2013
		(Dollars in millions)
	Coal	$	96.5	$	81.2
	Coke	6.9		11.8
	Materials, supplies and other	35.7		35.6
	Total inventories	$	139.1	$	128.6

Properties_Plants_and_Equipmen1

Properties, Plants and Equipment, Net (Tables)	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Components of net properties, plants and equipment	The components of net properties, plants and equipment were as follows:
		December  31,(1)
		2014			2013
		(Dollars in millions)
	Coke and energy plant, machinery and equipment	$	1,676.20		$	1,596.50
	Coal logistics plant, machinery and equipment	83.6			82.6
	Land and land improvements	82.5			82.5
	Construction-in-progress	62.4			57.3
	Other	65.3			76.3
	Gross investment, at cost	1,970.00			1,895.20
	Less: Accumulated depreciation	(503.4		)	(436.3		)
	Total properties, plants and equipment, net	$	1,466.60		$	1,458.90
	-1	Includes assets, consisting mainly of coke and energy plant, machinery and equipment, with a gross investment totaling $1,155.1 million and $1,133.1 million and accumulated depreciation of $262.4 million and $228.9 million at December 31, 2014 and December 31, 2013, respectively, which are subject to long-term contracts to sell coke and are deemed to contain operating leases.

Asset_Retirement_Obligations_T

Asset Retirement Obligations (Tables)	12 Months Ended
	Dec. 31, 2014
Asset Retirement Obligation [Abstract]
Reconciliation of changes in the asset retirement obligation	The following table provides a reconciliation of changes in the asset retirement obligation from continuing operations during each period (dollars in millions):
	Balance at January 1, 2013	$	7.7
	Liabilities incurred	3.1
	Liabilities settled	—
	Accretion expense(1)	0.6
	Revisions in estimated cash flows	(0.5		)
	Balance at December 31, 2013	$	10.9
	Liabilities incurred	2
	Liabilities settled	—
	Accretion expense(1)	0.9
	Revisions in estimated cash flows	1.3
	Balance at December 31, 2014	$	15.1
	-1	Included in cost of products sold and operating expenses.

Goodwill_and_Other_Intangible_1

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Finite-Lived Intangible Assets	The following table summarized the components of gross and net intangible asset balances as of December 31, 2014 and December 31, 2013 (in millions):
			December 31, 2014						December 31, 2013
		Weighted - Average Remaining Amortization Years	Gross Carrying Amount		Accumulated Amortization		Net		Gross Carrying Amount		Accumulated Amortization		Net
	Customer contracts	6	$	7.7	$	4.2	$	3.5	$	7.7	$	3.6	$	4.1
	Customer relationships	10	6.7		0.7		6		6.7		0.1		6.6
	Trade name	4	1.2		0.3		0.9		1.2		—		1.2
	Total		$	15.6	$	5.2	$	10.4	$	15.6	$	3.7	$	11.9

Retirement_Benefits_Plans_Tabl

Retirement Benefits Plans (Tables)	12 Months Ended
	Dec. 31, 2014
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Defined benefit plan expense (benefit)	Defined benefit plan expense (benefit) consisted of the following components:
		Years Ended December 31,
		2014				2013				2012
		(Dollars in millions)
	Interest cost on benefit obligations	$	1.5			$	1.3			$	1.5
	Expected return on plan assets	(1.8		)		(2.4		)		(1.8		)
	Amortization of:
	Actuarial losses	0.5				1				0.9
	Total expense (benefit)	$	0.2			$	(0.1	)		$	0.6
Postretirement benefit plans (benefit) expense	Postretirement benefit plans benefit consisted of the following components:
		Years Ended December 31,
		2014				2013				2012
		(Dollars in millions)
	Service cost	$	0.2			$	0.3			$	0.3
	Interest cost on benefit obligations	1.5				1.4				1.8
	Amortization of:
	Actuarial losses	0.9				1.5				1.6
	Prior service benefit	(5.6		)		(5.7		)		(5.6		)
	Curtailment gain	(2.5		)		—				—
	Total	$	(5.5	)		$	(2.5	)		$	(1.9	)
Defined benefit plan and postretirement benefit plans expense (benefit)	The following assumptions were used to determine defined benefit plan and postretirement benefit plans expense (benefit):
		Defined Benefit Plan									Postretirement Benefit Plans
		2014			2013			2012			2014		2013			2012
	Discount Rate	4.55	%		3.65	%		4.25	%		4.15	%	3.3	%		3.9	%
	Long-term expected rate of return on plan assets	4.9	%		7.1	%		6.25	%		—	%	—	%		—	%
Recognized components of other comprehensive income (loss)	The following amounts were recognized as components of other comprehensive (loss) income for the years ended December 31, 2014, 2013 and 2012:
		Defined Benefit Plan											Postretirement Benefit Plans
		2014				2013				2012			2014				2013			2012
		(Dollars in millions)
	Reclassifications to earnings of:
	Actuarial loss amortization	$	0.5			$	1			$	0.9		$	0.9			$	1.5		$	1.6
	Prior service benefit amortization	—				—				—			(5.6		)		(5.7		)	(5.6		)
	Curtailment gain	—				—				—			(2.5		)		—			—
	Retirement benefit plan funded status
	adjustments:
	Actuarial (losses) gains	(3.9		)		5.6				(1.9		)	0.2				3.9			0.4
	Prior service (cost) benefit	(0.5		)		—				—			—				—			3.9
		$	(3.9	)		$	6.6			$	(1.0	)	$	(7.0	)		$	(0.3	)	$	0.3
Components of changes in benefit obligations and fair value of plan assets	The following tables set forth the components of the changes in benefit obligations and fair value of plan assets during 2014 and 2013, as well as the funded status at December 31, 2014 and 2013:
		Defined								Postretirement
		Benefit Plan								Benefit Plans
		2014				2013				2014			2013
		(Dollars in millions)
	Benefit obligations at beginning of year(1)	$	32.9			$	37.5			$	38.4		$	43.7
	Service cost	—				—				0.2			0.3
	Interest cost	1.5				1.3				1.5			1.4
	Actuarial losses (gains)	7.2				(3.9		)		1.2			(4.0		)
	Plan amendments(2)	0.5				—				—			—
	Curtailment of benefits	—				—				(1.4		)	—
	Benefits paid	(2.2		)		(2.0		)		(2.8		)	(3.0		)
	Benefit obligations at end of year(1)	$	39.9			$	32.9			$	37.1		$	38.4
	Fair value of plan assets at beginning of year	$	36.9			$	34.9
	Actual income on plan assets	5.1				4
	Benefits paid from plan assets	(2.2		)		(2.0		)
	Fair value of plan assets at end of year	$	39.8			$	36.9
	Net (liability) asset at end of year(3)	$	(0.1	)		$	4			$	(37.1	)	$	(38.4	)
	(1) Represents both the accumulated benefit obligation and the projected benefit obligation for the defined benefit plan and the accumulated postretirement benefit obligations for the postretirement benefit plans.
	(2) The pension plan was terminated, effective May 30, 2014. As part of the plan termination process, all partially vested terminated participants were fully vested, and as a result, their accrued benefit increased $0.5 million. The amount is treated as a new prior service cost base which will be amortized over the plan's average future service.
	(3) Represents retirement benefit assets (liabilities), including current portion, on the Consolidated Balance Sheets. The current portion of retirement liabilities, which totaled $3.7 million and $3.6 million at December 31, 2014 and 2013, respectively, is classified in accrued liabilities on the Consolidated Balance Sheets.
Cumulative amounts not recognized	The following table sets forth the cumulative amounts not yet recognized in net income at December 31, 2014 and 2013:
		Defined								Postretirement
		Benefit Plan								Benefit Plans
		2014				2013				2014			2013
		(Dollars in millions)
	Cumulative amounts not yet recognized in net income:
	Actuarial losses	$	13.5			$	10.1			$	10		$	11.1
	Prior service costs (benefits)	0.5				—				(8.4		)	(16.5		)
	Accumulated other comprehensive loss (income) (before	$	14			$	10.1			$	1.6		$	(5.4	)
	related tax benefit)
Schedule of plan assets in the funded defined benefit plan measured at fair value	The following table sets forth the plan assets in the funded defined benefit plan measured at fair value, by input level, at December 31, 2014 and 2013:
		Quoted Prices in Active Markets for
		Identical Assets (Level 1)
		2014				2013
		(Dollars in millions)
	Mutual Funds:
	Fixed income securities	$	39.4			$	36
	Cash and cash equivalents	0.4				0.9
	Total	$	39.8			$	36.9
Expected benefit payments	The expected benefit payments through 2024 for the defined benefit plan and postretirement benefit plans are as follows:
		Defined				Postretirement
		Benefit Plan				Benefit Plans
		(Dollars in millions)
	Year ending December 31:
	2015	$	2.2			$	3.7
	2016	2.3				3.8
	2017	2.3				3.5
	2018	2.3				3.2
	2019	2.2				3
	2020 through 2024	10.7				12.1
Discount rates used to determine benefit obligations for the plans	The following discount rates were used at December 31, 2014 and 2013, respectively, to determine benefit obligations for the plans (in percentages):
		Defined						Postretirement
		Benefit Plan						Benefit Plans
		2014			2013			2014			2013
	Discount rate	3.75	%		4.55	%		3.45	%		4.15	%

Accrued_Liabilities_Tables

Accrued Liabilities (Tables)	12 Months Ended
	Dec. 31, 2014
Balance Sheet Related Disclosures [Abstract]
Accrued liabilities	Accrued liabilities consist of following:
		December 31,
		2014		2013
		(Dollars in millions)
	Accrued sales discounts	$	—	$	13.6
	Accrued benefits	21		23.5
	Other taxes payable	10.4		9.8
	Other	10.2		12.6
	Total	$	41.6	$	59.5

Debt_Tables

Debt (Tables)	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Total debt, including the current portion of long-term debt	Total debt consisted of the following:
		December 31,
		2014		2013
		(Dollars in millions)
	Term loans, bearing interest at variable rates, due 2018, net of original issue discount of $1.0	$	—	$	99.1
	million at December 31, 2013(1)
	Revolving credit facility, due 2019	—		40
	7.625 percent senior notes, due 2019 (“Notes”)	240		400
	7.375 percent senior notes, due 2020 ("Partnership Notes"), including original issue premium of $11.5 million at December 31, 2014.	411.5		150
	Total debt	$	651.5	$	689.1
	Less: short-term debt, including current portion of long-term debt	—		41
	Total long-term debt	$	651.5	$	648.1
	(1) Borrowed under the Company’s Credit Agreement dated as of July 26, 2011 (“Credit Agreement”).

Recovered_Sheet1

Commitments And Contingent Liabilities (Tables)	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Aggregate amount of future minimum annual rentals applicable to noncancelable operating leases and related subleases	The aggregate amount of future minimum annual rental payments applicable to noncancelable operating leases is as follows:
		Minimum
		Rental
		Payments
		(Dollars in millions)
	Year ending December 31:
	2015	$	4.1
	2016	3.5
	2017	2
	2018	1.3
	2019	1
	2020-Thereafter	2.9
	Total	$	14.8

Restructuring_Tables

Restructuring (Tables)	12 Months Ended
	Dec. 31, 2014
Restructuring and Related Activities [Abstract]
Aggregate restructuring charges	The following table presents aggregate Corporate restructuring charges:
		Employee-			Asset write-offs			Contract			Total
		Related						Terminations
		Costs
		(Dollars in millions)
	Prior to 2012	$	5.5		$	0.9		$	2		$	8.4
	Year Ended December 31, 2012	0.5			—			0.1			0.6
	Year Ended December 31, 2013	0.1			—			1.2			1.3
	Year Ended December 31, 2014	1.4			—			0.7			2.1
	Charges recorded through December 31, 2014	$	7.5		$	0.9		$	4		$	12.4
Accrued restructuring and related activity	The following table presents accrued restructuring and related activity for corporate as of and for the years ended December 31, 2014, 2013, and 2012:
		Employee-			Contract			Total
		Related			Terminations
		Costs
		(Dollars in millions)
	Balance at December 31, 2011	$	0.8		$	1.7		$	2.5
	Charges	0.5			0.1			0.6
	Cash payments	(0.7		)	(0.4		)	(1.1		)
	Balance at December 31, 2012	$	0.6		$	1.4		$	2
	Charges	0.1			1.2			1.3
	Cash payments	(0.6		)	(0.9		)	(1.5		)
	Balance at December 31, 2013	$	0.1		$	1.7		$	1.8
	Charges	1.4			0.7			2.1
	Cash Payments	(1.0		)	(1.0		)	(2.0		)
	Balance at December 31, 2014	$	0.5		$	1.4		$	1.9

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Loss (Tables)	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Components of accumulated other comprehensive (loss) income	The following tables set forth the changes in the balance of accumulated other comprehensive loss, net of tax, by component:
		Benefit Plans			Currency Translation Adjustments			Total
		(Dollars in millions)
	At December 31, 2012	$	(6.6	)	$	(1.3	)	$	(7.9	)
	Other comprehensive loss before reclassifications	—			(10.0		)	(10.0		)
	Amounts reclassified from accumulated other comprehensive	(1.9		)	—			(1.9		)
	loss
	Retirement benefit plans funded status adjustment	5.7			—			5.7
	Net current period other comprehensive income (loss)	3.8			(10.0		)	(6.2		)
	At December 31, 2013	$	(2.8	)	$	(11.3	)	$	(14.1	)
	Other comprehensive loss before reclassifications	—			(0.8		)	(0.8		)
	Amounts reclassified from accumulated other comprehensive	(4.0		)	—			(4.0		)
	loss
	Retirement benefit plans funded status adjustment	(2.6		)	—			(2.6		)
	Net current period other comprehensive loss	(6.6		)	(0.8		)	(7.4		)
	At December 31, 2014	$	(9.4	)	$	(12.1	)	$	(21.5	)
Impact of Net Income on Reclassification Adjustments	The impact of net income on reclassification adjustments from accumulated other comprehensive loss were as follows:
		December 31,
		2014			2013			2012
		(Dollars in millions)
	Amortization of benefit plans to net income:
	Prior service benefit and curtailment gain	$	8.1		$	5.7		$	5.6
	Actuarial loss	(1.4		)	(2.5		)	(2.5		)
	Total before taxes	6.7			3.2			3.1
	Income tax benefit	(2.7		)	(1.3		)	(1.2		)
	Total, net of tax	$	4		$	1.9		$	1.9

ShareBased_Compensation_Tables

Share-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2014
Share-based Compensation [Abstract]
Weighted-average assumptions	The weighted-average fair value of employee stock options granted during the years ended December 31, 2014, 2013 and 2012 was $7.86, $6.00 and $5.70, respectively, using the following weighted-average assumptions:
		Years Ended December 31,
		2014		2013		2012
	Risk Free Interest Rate	1.57	%	0.93	%	0.82	%
	Expected Term	5 years		5 years		5 years
	Volatility	38	%	44	%	45	%
	Dividend Yield	—	%	—	%	—	%
Summary of information with respect to common stock option awards	The following table summarizes information with respect to common stock option awards outstanding as of December 31, 2014 and of stock option activity during the fiscal year then ended:
		Number of		Weighted			Weighted Average Remaining Contractual Term (years)	Aggregate
		Options		Average				Intrinsic Value (millions)
				Exercise Price
	Outstanding at December 31, 2013	2,287,252		$	16.52		8	$	14.4
	Granted	407,075		$	22.3
	Exercised	(185,433	)	$	16.96
	Forfeited	(105,044	)	$	19.55
	Outstanding at December 31, 2014	2,403,850		$	17.34		7.3	$	5.9
	Exercisable at December 31, 2014	1,570,632		$	16.66		6.8	$	4.2
	Expected to vest at December 31, 2014	828,226		$	18.63		8.3	$	1.6
Summary of information with respect to RSUs	The following table summarizes information with respect to RSUs outstanding as of December 31, 2014 and of RSU activity during the fiscal year then ended:
		Number of		Weighted
		RSUs		Average Grant-
				Date Fair Value
	Nonvested at December 31, 2013	501,801		$	16.44
	Granted	236,844		$	22.06
	Vested	(181,925	)	$	16.48
	Forfeited	(77,047	)	$	19.07
	Nonvested at December 31, 2014	479,673		$	18.77
Summary of information with respect to PSUs	The following table summarizes information with respect to unearned PSUs outstanding as of December 31, 2014 and of PSU activity during the fiscal year then ended:
		Number of		Weighted
		PSUs		Average Grant-
				Date Fair Value
	Nonvested at December 31, 2013	96,073		$	19.56
	Granted	84,734		$	26.09
	Vested	—		$	—
	Forfeited	(19,369	)	$	19.21
	Nonvested at December 31, 2014	161,438		$	22.63

Earnings_per_Share_Tables

Earnings per Share (Tables)	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Reconciliation of the weighted-average number of common shares used to compute basic earnings per share ("EPS") to those used to compute diluted EPS	The following table sets forth the reconciliation of the weighted-average number of common shares used to compute basic earnings per share (“EPS”) to those used to compute diluted EPS:
		Years Ended December 31,
		2014	2013	2012
		(Shares in millions)
	Weighted-average number of common shares outstanding-basic	68.8	69.9	70
	Add: effect of dilutive share-based compensation awards	—	0.3	0.3
	Weighted-average number of shares-diluted	68.8	70.2	70.3

Supplemental_Cash_Flow_Informa1

Supplemental Cash Flow Information (Tables)	12 Months Ended
	Dec. 31, 2014
Supplemental Cash Flow Information [Abstract]
Supplemental Cash Flow Information	Net cash provided by continuing operating activities reflected cash payments for interest and income taxes as follows:
		Years Ended December 31,
		2014		2013		2012
		(Dollars in millions)
	Interest paid	$	45.8	$	43.2	$	44
	Income taxes paid	$	9.1	$	15.3	$	6.3

Business_Segment_Information_T

Business Segment Information (Tables)	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Business segment information	The following table includes Adjusted EBITDA, which is the measure of segment profit or loss reported to the chief operating decision maker for purposes of allocating resources to the segments and assessing their performance:
			Year Ended December 31,
			2014				2013				2012
			(Dollars in millions)
	Sales and other operating revenue:
	Domestic Coke		$	1,388.30			$	1,528.70			$	1,816.80
	Brazil Coke		37				35.4				36.9
	Coal Logistics		36.2				8.1				—
	Coal Logistics intersegment sales		18.8				5.5				—
	Corporate and other intersegment sales		18.6				17.5				17.9
	Elimination of intersegment sales		(37.4		)		(23.0		)		(17.9		)
	Total sales and other operating revenue		$	1,461.50			$	1,572.20			$	1,853.70
	Adjusted EBITDA:
	Adjusted EBITDA from continuing operations:
	Domestic Coke		$	247.9			$	243.2			$	249.3
	Brazil Coke		18.9				16.1				11.9
	India Coke		(3.1		)		0.9				—
	Coal Logistics		14.3				4.7				—
	Corporate and Other		(40.2		)		(43.1		)		(33.5		)
	Total Adjusted EBITDA from continuing operations		237.8				221.8				227.7
	Legacy costs, net		(17.1		)		(0.4		)		(3.9		)
	Adjusted EBITDA from discontinued operations		(10.0		)		(6.3		)		41.8
	Adjusted EBITDA		$	210.7			$	215.1			$	265.6
	Depreciation and amortization expense:
	Domestic Coke		$	81.3			$	68.1			$	60.7
	Brazil Coke		0.5				0.4				0.3
	Coal Logistics		7.6				1.8				—
	Corporate and Other		6.7				6.8				4
	Total depreciation and amortization expense		$	96.1			$	77.1			$	65
	Capital expenditures:
	Domestic Coke		$	109.2			$	121.2			$	42.3
	Brazil Coke		0.9				0.8				1.5
	Coal Logistics		2.9				0.2				—
	Corporate and Other		5.3				10.1				10.4
	Total capital expenditures		$	118.3			$	132.3			$	54.2
			Year Ended December 31,
			2014				2013
			(Unaudited)
			(Dollars in millions, except
			per share amounts)
	Segment assets
	Domestic Coke		$	1,585.80			$	1,533.70
	Brazil Coke		61.6				61.4
	India Coke		22.5				57
	Coal Logistics		114.4				119
	Corporate and Other		162.1				294.6
	Segments assets, excluding tax assets and discontinued operations		1,946.40				2,065.70
	Discontinued operations		19.3				159
	Tax assets		32.4				19.2
	Total assets		$	1,998.10			$	2,243.90
	The following table sets forth the Company’s total sales and other operating revenue by product or service:
		Years Ended December 31,
		2014				2013				2012
		(Dollars in millions)
	Coke sales	$	1,322.80			$	1,463.00			$	1,750.50
	Steam and electricity sales	65.7				65.6				62.5
	Operating and licensing fees	36.9				35.4				36.9
	Coal logistics	33.9				7.2				—
	Other	2.2				1				3.8
	Total sales and other operating revenue	$	1,461.50			$	1,572.20			$	1,853.70
		Years Ended December 31,
		2014				2013				2012
		(Dollars and shares in millions)
	Black lung charges	$	14.3			$	(0.3	)		$	3.3
Postretirement benefit plan benefit	(3.7		)		(1.0		)		(0.6		)
Defined benefit plan expense (benefit)	0.2				(0.1		)		0.6
Workers compensation expense	4.6				2				1.2
Other	1.7				(0.2		)		(0.6		)
Total legacy costs, net	$	17.1			$	0.4			$	3.9
Reconciliation of Adjusted EBITDA (unaudited) to net income	Below is a reconciliation of Adjusted EBITDA (unaudited) to net income, which is its most directly comparable financial measure calculated and presented in accordance with GAAP:
		Year Ended December 31,
		2014				2013				2012
		(Dollars in millions)
	Adjusted EBITDA attributable to SunCoke Energy, Inc.	$	150			$	173.9			$	265.6
	Add: Adjusted EBITDA attributable to noncontrolling interest(1)	60.7				41.2				—
	Adjusted EBITDA	$	210.7			$	215.1			$	265.6
	Subtract:
	Adjusted EBITDA from discontinued operations(2)	(10.0		)		(6.3		)		41.8
	Legacy costs, net(3)	(17.1		)		(0.4		)		(3.9		)
	Adjusted EBITDA from continuing operations	$	237.8			$	221.8			$	227.7
	Subtract:
	Adjustment to unconsolidated affiliate earnings(4)	3				3.2				—
	Depreciation and amortization expense	96.1				77.1				65
	India impairment	30.5				—				—
	Interest expense, net	63.2				52.3				47.6
	Income tax expense	7.4				16.4				18
	Sales discounts provided to customers due to sharing of	(0.5		)		6.8				11.2
	nonconventional fuel tax credits(5)
	Asset impairment	16.8				—				—
	Legacy costs, net(3)	17.1				0.4				3.9
	Income from continuing operations	$	4.2			$	65.6			$	82
	Loss (income) from discontinued operations, net of tax	(106.0		)		(15.5		)		20.5
	Net (loss) income	$	(101.8	)		$	50.1			$	102.5
	-1	Reflects noncontrolling interest in Indiana Harbor and the portions of the Partnership owned by public unitholders.
	-2	See reconciliation of Adjusted EBITDA from discontinued operations below.
	-3	Legacy costs, net includes royalty revenues and costs related to coal mining assets and liabilities expected to be retained by the Company which are not part of the disposal group, and therefore, are reported in continuing operations in Corporate and Other. See detail of these legacy costs in the table below.
	-4	Reflects share of interest, taxes, depreciation and amortization related to VISA SunCoke.
	-5	Sales discounts are related to nonconventional fuel tax credits, which expired in 2013. At December 31, 2013, we had $13.6 million accrued related to sales discounts to be paid to our customer at our Granite City facility. During the first quarter of 2014, we settled this obligation for $13.1 million which resulted in a gain of $0.5 million. The gain was recorded in sales and other operating revenue on our Consolidated Statement of Operations.
	Below is a reconciliation of Adjusted EBITDA from discontinued operations to its closest GAAP measure:
		Year Ended December 31,
		2014				2013				2012
		(Dollars in millions)
	Adjusted EBITDA from discontinued operations	$	(10.0	)		$	(6.3	)		$	41.8
	Subtract:
	Depreciation and depletion from discontinued operations	10.2				18.9				16
	Income tax (benefit) expense from discontinued operations	(66.2		)		(9.7		)		5.3
	Asset and goodwill impairment from discontinued operations	133.5				—				—
	Exit costs	18.5				—				—
	(Loss) income from discontinued operations, net of tax	$	(106.0	)		$	(15.5	)		$	20.5
Summary of total sales and other operating revenue by product or service
		Year Ended December 31,
		2014				2013				2012
		(Dollars in millions)
	Adjusted EBITDA from discontinued operations	$	(10.0	)		$	(6.3	)		$	41.8
	Subtract:
	Depreciation and depletion from discontinued operations	10.2				18.9				16
	Income tax (benefit) expense from discontinued operations	(66.2		)		(9.7		)		5.3
	Asset and goodwill impairment from discontinued operations	133.5				—				—
	Exit costs	18.5				—				—
	(Loss) income from discontinued operations, net of tax	$	(106.0	)		$	(15.5	)		$	20.5

Selected_Quarterly_Data_unaudi1

Selected Quarterly Data (unaudited) (Tables)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Schedule of quarterly financial information
		2014												2013
		First			Second			Third			Fourth			First			Second			Third			Fourth
		Quarter			Quarter			Quarter			Quarter			Quarter			Quarter			Quarter			Quarter
		(Dollars in millions)
	Sales and other operating revenue	$	351.5		$	364.2		$	367.5		$	378.3		$	438		$	383.7		$	373.1		$	377.4
	Gross profit(1)	$	33.7		$	55.2		$	64.3		$	38.1		$	49.8		$	51.7		$	54.6		$	56.5
	Income (loss) from continuing operations(2)	$	2.2		$	(7.2	)	$	24.9		$	(15.7	)	$	11.1		$	15.5		$	15.9		$	23.1
	Loss from discontinued operations, net of income tax benefit(3)	$	(6.2	)	$	(41.2	)	$	(18.5	)	$	(40.1	)	$	(4.7	)	$	(2.8	)	$	(3.6	)	$	(4.4	)
	Net (loss) income	$	(4.0	)	$	(48.4	)	$	6.4		$	(55.8	)	$	6.4		$	12.7		$	12.3		$	18.7
	Less: Net income attributable to noncontrolling interests	$	4		$	0.7		$	10		$	9.6		$	4.3		$	7		$	6.1		$	7.7
	Net (loss) income attributable to SunCoke Energy, Inc.	$	(8.0	)	$	(49.1	)	$	(3.6	)	$	(65.4	)	$	2.1		$	5.7		$	6.2		$	11.1
	(Loss) earnings attributable to SunCoke Energy, Inc. per common share:
	Basic
	Continuing operations	$	(0.02	)	$	(0.12	)	$	(0.21	)	$	(0.38	)	$	(0.10	)	$	0.12		$	0.14		$	0.22
	Discontinued operations	$	(0.09	)	$	(0.59	)	$	(0.27	)	$	(0.60	)	$	(0.07	)	$	(0.04	)	$	(0.05	)	$	(0.06	)
	Diluted
	Continuing operations	$	(0.02	)	$	(0.12	)	$	(0.21	)	$	(0.38	)	$	(0.10	)	$	0.12		$	0.14		$	0.22
	Discontinued operations	$	(0.09	)	$	(0.59	)	$	(0.26	)	$	(0.60	)	$	(0.07	)	$	(0.04	)	$	(0.05	)	$	(0.06	)
	Cash dividend declared per share(4)	$	—		$	—		$	—		$	0.0585		$	—		$	—		$	—		$	—
	-1	Gross profit equals sales and other operating revenue less cost of products sold, operating expenses and depreciation and amortization.
	-2	Income from continuing operations includes an impairment charge of legacy coal mining assets of $15.1 million and related tax benefit of $5.8 million and $1.7 million and related tax benefit of $0.7 million during the second and fourth quarters of 2014, respectively. The Company does not expect these legacy assets to be part of the sale of our coal mining operations.
	-3	Loss from discontinued operations includes impairment charges, net of tax, of $54.0 million, $10.1 million and $17.8 million for the second, third and fourth quarters of 2014, respectively.
	-4	On October 23, 2014, the Company's Board of Directors declared our very first cash dividend of $0.0585 per share, which was paid on November 28, 2014 to shareholders of record at the close of business on November 14, 2014.

Supplemental_Condensed_Consoli1

Supplemental Condensed Consolidating Financial Information (Tables)	12 Months Ended
	Dec. 31, 2014
Supplemental Condensed Consolidating Financial Information [Abstract]
Condensed Consolidating Statement of Income	SunCoke Energy, Inc.
	Condensed Consolidating Statement of Operations
	Year Ended December 31, 2014
	(Dollars in millions)
		Issuer				Guarantor				Non-				Combining				Total
						Subsidiaries				Guarantor				and
										Subsidiaries				Consolidating
														Adjustments
	Revenues
	Sales and other operating revenue	$	—			$	435.8			$	1,025.70			$	—			$	1,461.50
	Equity in (loss) earnings of subsidiaries	(101.3		)		56				—				45.3				—
	Other (loss) income, net	(0.3		)		1.6				9.9				—				11.2
	Total revenues	(101.6		)		493.4				1,035.60				45.3				1,472.70
	Costs and operating expenses
	Cost of products sold and operating expenses	—				354				820.1				—				1,174.10
	Selling, general and administrative expenses	13.4				34.5				28				—				75.9
	Depreciation and amortization expenses	—				25.5				70.6				—				96.1
	Asset impairment	—				16.8				—				—				16.8
	Total costs and operating expenses	13.4				430.8				918.7								1,362.90
	Operating (loss) income	(115.0		)		62.6				116.9				45.3				109.8
	Interest (income) expense, net - affiliate	—				(7.3		)		7.3				—				—
	Interest expense (income), net	26.3				(1.8		)		38.7				—				63.2
	Total interest expense (income), net	26.3				(9.1		)		46				—				63.2
	(Loss) income before income tax expense and loss from	(141.3		)		71.7				70.9				45.3				46.6
	equity method investment
	Income tax (benefit) expense	(15.2		)		24.5				(1.9		)		—				7.4
	Loss from equity method investment	—				—				35				—				35
	(Loss) income from continuing operations	(126.1		)		47.2				37.8				45.3				4.2
	Loss from discontinued operations net of income tax benefit of $66.2 million	—				(106.0		)		—				—				(106.0		)
	Net (loss) income	(126.1		)		(58.8		)		37.8				45.3				(101.8		)
	Less: Net income attributable to noncontrolling interests	—				—				24.3				—				24.3
	Net (loss) income attributable to SunCoke Energy, Inc.	$	(126.1	)		$	(58.8	)		$	13.5			$	45.3			$	(126.1	)
	Comprehensive (loss) income	$	(133.5	)		$	(65.4	)		$	37			$	52.7			$	(109.2	)
	Less: Comprehensive income attributable to noncontrolling interests	—				—				24.3				—				24.3
	Comprehensive (loss) income attributable to SunCoke Energy, Inc.	$	(133.5	)		$	(65.4	)		$	12.7			$	52.7			$	(133.5	)
	SunCoke Energy, Inc.
	Condensed Consolidating Statement of Income
	Year Ended December 31, 2013
	(Dollars in millions)
		Issuer				Guarantor				Non-				Combining				Total
						Subsidiaries				Guarantor				and
										Subsidiaries				Consolidating
														Adjustments
	Revenues
	Sales and other operating revenue	$	—			$	480.6			$	1,091.60			$	—			$	1,572.20
	Equity in earnings of subsidiaries	56.2				88.6				—				(144.8		)		—
	Other income, net	—				3.7				9.6				—				13.3
	Total revenues	56.2				572.9				1,101.20				(144.8		)		1,585.50
	Costs and operating expenses
	Cost of products sold and operating expenses	—				389.4				893.1				—				1,282.50
	Selling, general and administrative expenses	12.1				49.6				27.7				—				89.4
	Depreciation and amortization expenses	—				25.2				51.9				—				77.1
	Total costs and operating expenses	12.1				464.2				972.7				—				1,449.00
	Operating income	44.1				108.7				128.5				(144.8		)		136.5
	Interest (income) expense, net - affiliate	—				(7.3		)		7.3				—				—
	Interest expense (income), net	37.9				(0.8		)		15.2				—				52.3
	Total interest expense (income), net	37.9				(8.1		)		22.5				—				52.3
	Income before income tax expense and loss from equity method investment	6.2				116.8				106				(144.8		)		84.2
	Income tax (benefit) expense	(18.8		)		36.8				(1.6		)		—				16.4
	Loss from equity method investment	—				—				2.2				—				2.2
	Income from continuing operations	25				80				105.4				(144.8		)		65.6
	Loss from discontinued operations, net of income tax benefit of $9.7 million	—				(15.5		)		—				—				(15.5		)
	Net income	25				64.5				105.4				(144.8		)		50.1
	Less: Net income attributable to noncontrolling interests	—				—				25.1				—				25.1
Net income attributable to SunCoke Energy, Inc.	$	25			$	64.5			$	80.3			$	(144.8	)		$	25
Comprehensive income	$	18.8			$	68.5			$	95.2			$	(138.6	)		$	43.9
Less: Comprehensive income attributable to noncontrolling interests	—				—				25.1				—				25.1
Comprehensive income attributable to SunCoke Energy, Inc.	$	18.8			$	68.5			$	70.1			$	(138.6	)		$	18.8
SunCoke Energy, Inc.
Condensed Combining and Consolidating Statement of Income
Year Ended December 31, 2012
(Dollars in millions)
	Issuer				Guarantor				Non-				Combining				Total
					Subsidiaries				Guarantor				and
									Subsidiaries				Consolidating
													Adjustments
Revenues
Sales and other operating revenue	$	—			$	564.4			$	1,289.30			$	—			$	1,853.70
Equity in earnings of subsidiaries	138.9				95.5				—				(234.4		)		—
Other income, net	—				1.5				9.5				—				11
Total revenues	138.9				661.4				1,298.80				(234.4		)		1,864.70
Costs and operating expenses
Cost of products sold and operating expenses	—				462.6				1,110.50				—				1,573.10
Selling, general and administrative expenses	10.6				42.4				26				—				79
Depreciation and amortization expenses	—				22.3				42.7				—				65
Total costs and operating expenses	10.6				527.3				1,179.20				—				1,717.10
Operating income	128.3				134.1				119.6				(234.4		)		147.6
Interest (income) expense, net - affiliate	—				(7.4		)		7.4				—				—
Interest expense (income), net	48				—				(0.4		)		—				47.6
Total interest expense (income), net	48				(7.4		)		7				—				47.6
Income before income tax expense and loss from equity method investment	80.3				141.5				112.6				(234.4		)		100
Income tax (benefit) expense	(18.5		)		13.5				23				—				18
Income from continuing operations	98.8				128				89.6				(234.4		)		82
Income from discontinued operations, net of income tax expense of $5.3 million	—				20.5				—				—				20.5
Net income	98.8				148.5				89.6				(234.4		)		102.5
Less: Net income attributable to noncontrolling interests	—				—				3.7				—				3.7
Net income attributable to SunCoke Energy, Inc.	$	98.8			$	148.5			$	85.9			$	(234.4	)		$	98.8
Comprehensive income	$	97.4			$	148.2			$	88.5			$	(233.0	)		$	101.1
Less: Comprehensive income attributable to noncontrolling interests	—				—				3.7				—				3.7
Comprehensive income attributable to SunCoke Energy, Inc.	$	97.4			$	148.2			$	84.8			$	(233.0	)		$	97.4
Condensed Consolidating Balance Sheet	SunCoke Energy, Inc.
	Condensed Consolidating Balance Sheet
	December 31, 2014
	(Dollars in millions, except per share amounts)
			Issuer				Guarantor				Non-				Combining				Total
							Subsidiaries				Guarantor				and
											Subsidiaries				Consolidating
															Adjustments
	Assets
	Cash and cash equivalents		$	—			$	102.4			$	36.6			$	—			$	139
	Receivables		0.1				23.1				52.2				—				75.4
	Inventories		—				39.2				99.9				—				139.1
	Income tax receivable		28				—				6.8				(28.8		)		6
	Deferred income taxes		2.6				25.6				0.8				(2.6		)		26.4
	Other current assets		—				2.7				0.9				—				3.6
	Current assets held for sale		—				19.3				—				—				19.3
	Advances to affiliates		—				150.5				—				(150.5		)		—
	Total current assets		30.7				362.8				197.2				(181.9		)		408.8
	Notes receivable from affiliate		—				89				300				(389.0		)		—
	Investment in Brazilian cokemaking operations		—				—				41				—				41
	Equity method investment in VISA SunCoke Limited		—				—				22.3				—				22.3
	Properties, plants and equipment, net		—				387.8				1,078.80				—				1,466.60
	Goodwill and other intangible assets, net		—				6.9				15.1				—				22
	Deferred charges and other assets		5.8				13				18.6				—				37.4
	Investment in subsidiaries		718.2				494.1				—				(1,212.3		)		—
	Total assets		$	754.7			$	1,353.60			$	1,673.00			$	(1,783.2	)		$	1,998.10
	Liabilities and Equity
	Advances from affiliate		$	73.4			$	—			$	77.1			$	(150.5	)		$	—
	Accounts payable		—				29.3				81.6				—				110.9
	Accrued liabilities		0.1				23.4				18.1				—				41.6
	Interest payable		7.6				—				12.3				—				19.9
	Income taxes payable		—				28.8				—				(28.8		)		—
	Current liabilities held for sale		—				37.4				—				—				37.4
	Total current liabilities		81.1				118.9				189.1				(179.3		)		209.8
	Long term-debt		240				—				411.5				—				651.5
	Payable to affiliate		—				300				89				(389.0		)		—
	Accrual for black lung benefits		—				43.9				—				—				43.9
	Retirement benefit liabilities		—				33.6				—				—				33.6
	Deferred income taxes		—				320.8				3.7				(2.6		)		321.9
	Asset retirement obligations		—				12.5				2.6				—				15.1
	Other deferred credits and liabilities		1.9				13.8				1.2				—				16.9
	Total liabilities		323				843.5				697.1				(570.9		)		1,292.70
	Equity
	Preferred stock, $0.01 par value. Authorized 50,000,000		—				—				—				—				—
	shares; no issued and outstanding shares at
	31-Dec-14
	Common stock, $0.01 par value. Authorized 300,000,000		0.7				—				—				—				0.7
	shares; issued 71,251,529 shares at December 31, 2014
	Treasury Stock, 4,977,115 shares at December 31, 2014		(105.0		)		—				—								(105.0		)
	Additional paid-in capital		543.6				176.6				501.1				(677.7		)		543.6
	Accumulated other comprehensive loss		(21.5		)		(9.3		)		(12.2		)		21.5				(21.5		)
	Retained earnings		13.9				342.8				213.3				(556.1		)		13.9
	Total SunCoke Energy, Inc. stockholders’ equity		431.7				510.1				702.2				(1,212.3		)		431.7
	Noncontrolling interests		—				—				273.7				—				273.7
	Total equity		431.7				510.1				975.9				(1,212.3		)		705.4
	Total liabilities and equity		$	754.7			$	1,353.60			$	1,673.00			$	(1,783.2	)		$	1,998.10
	SunCoke Energy, Inc.
	Condensed Consolidating Balance Sheet
	December 31, 2013
	(Dollars in millions, except per share amounts)
			Issuer				Guarantor				Non-				Combining				Total
							Subsidiaries				Guarantor				and
											Subsidiaries				Consolidating
															Adjustments
Assets
Cash and cash equivalents		$	—			$	184.7			$	48.9			$	—			$	233.6
Receivables		—				47.2				38.1				—				85.3
Inventories		—				37.4				91.2				—				128.6
Income taxes receivable		39.9				—				13.4				(46.7		)		6.6
Deferred income taxes		9.4				11.8				0.8				(9.4		)		12.6
Advances to affiliate		48.2				33.6				—				(81.8		)		—
Other current assets		—				1.3				1				—				2.3
Current assets held for sale		—				12.9				—				—				12.9
Interest receivable from affiliate		—				7.3				—				(7.3		)		—
Total current assets		97.5				336.2				193.4				(145.2		)		481.9
Notes receivable from affiliate		—				89				300				(389.0		)		—
Investment in Brazilian cokemaking operations		—				—				41				—				41
Equity method investment in VISA SunCoke Limited		—				—				56.8				—				56.8
Properties, plants and equipment, net		—				415.7				1,043.20				—				1,458.90
Goodwill and other intangible assets, net		—				7.5				16				—				23.5
Deferred charges and other assets		11.7				14.3				9.7				—				35.7
Long-term assets held for sale		—				146.1				—				—				146.1
Investment in subsidiaries		963.3				723.8				—				(1,687.1		)		—
Total assets		$	1,072.50			$	1,732.60			$	1,660.10			$	(2,221.3	)		$	2,243.90
Liabilities and Equity
Advances from affiliate		$	—			$	48.2			$	33.6			$	(81.8	)		$	—
Accounts payable		—				32.9				105.5				—				138.4
Accrued liabilities		0.5				42.6				16.4				—				59.5
Short-term debt, including current portion of long-term debt		1				—				40				—				41
Interest payable		13.6				—				4.6				—				18.2
Income taxes payable		—				46.7				—				(46.7		)		—
Interest payable to affiliate		—				—				7.3				(7.3		)		—
Current liabilities held for sale		—				25.9				—				—				25.9
Total current liabilities		15.1				196.3				207.4				(135.8		)		283
Long-term debt		498.4				—				149.7				—				648.1
Payable to affiliate		—				300				89				(389.0		)		—
Accrual for black lung benefits		—				32.4				—				—				32.4
Retirement benefit liabilities		—				34.8				—				—				34.8
Deferred income taxes		—				362				2.1				(9.4		)		354.7
Asset retirement obligations		—				8.5				2.4				—				10.9
Other deferred credits and liabilities		1.6				12.2				0.6				—				14.4
Long-term liabilities held for sale		—				33.3				—				—				33.3
Total liabilities		515.1				979.5				451.2				(534.2		)		1,411.60
Equity
Preferred stock, $0.01 par value. Authorized 50,000,000		—				—				—				—				—
shares; no issued and outstanding shares at
31-Dec-13
Common stock, $0.01 par value. Authorized 300,000,000		0.7				—				—				—				0.7
shares; issued 70,892,140 shares at
December 31, 2013
Treasury stock, 1,255,355 shares at December 31, 2013		(19.9		)		—				—				—				(19.9		)
Additional paid-in capital		446.9				354.2				745.6				(1,099.8		)		446.9
Accumulated other comprehensive income		(14.1		)		(2.7		)		(11.4		)		14.1				(14.1		)
Retained earnings		143.8				401.6				199.8				(601.4		)		143.8
Total SunCoke Energy, Inc. stockholders’ equity		557.4				753.1				934				(1,687.1		)		557.4
Noncontrolling interests		—				—				274.9				—				274.9
Total equity		557.4				753.1				1,208.90				(1,687.1		)		832.3
Total liabilities and equity		$	1,072.50			$	1,732.60			$	1,660.10			$	(2,221.3	)		$	2,243.90
Sun
Condensed Combining and Consolidating Statement of Cash Flows	SunCoke Energy, Inc.
	Condensed Consolidating Statement of Cash Flows
	Year Ended December 31, 2014
	(Dollars in millions)
		Issuer				Guarantor				Non-				Combining				Total
						Subsidiaries				Guarantor				and
										Subsidiaries				Consolidating
														Adjustments
	Cash Flows from Continuing Operating Activities:
	Net (loss) income	$	(126.1	)		$	(58.8	)		$	37.8			$	45.3			$	(101.8	)
	Adjustments to reconcile net income to net cash provided by continuing operating activities:
	Loss from discontinued operations, net of tax	—				106				—				—				106
	Asset impairment	—				16.8				—				—				16.8
	Depreciation and amortization expense	—				25.5				70.6				—				96.1
	Deferred income tax expense (benefit)	6.8				(14.3		)		1.5				—				(6.0		)
	Payments in excess of expense for retirement plans	—				(8.1		)		—				—				(8.1		)
	Share-based compensation expense	9.8				—				—				—				9.8
	Equity in loss (earnings) of subsidiaries	101.3				(56.0		)		—				(45.3		)		—
	Excess tax benefit from share-based awards	(0.4		)		0.1				—				—				(0.3		)
	Loss from equity method investment	—				—				35				—				35
	Loss on extinguishment/modification of debt	—				—				15.4				—				15.4
	Changes in working capital pertaining to continuing operating activities (net of acquisitions):
	Receivables	(0.1		)		24.1				(14.1		)		—				9.9
	Inventories	—				(1.8		)		(8.7		)		—				(10.5		)
	Accounts payable	—				(3.6		)		(23.9		)		—				(27.5		)
	Accrued liabilities	(0.5		)		(19.1		)		1.7				—				(17.9		)
	Interest payable	(6.0		)		7.3				0.4				—				1.7
	Income taxes	12.3				(17.9		)		6.6				—				1
	Accrual for black lung benefits	—				11.5				—								11.5
	Other	6.1				0.2				(7.4		)		—				(1.1		)
	Net cash provided by continuing operating activities	3.2				11.9				114.9				—				130
	Cash Flows from Continuing Investing Activities:
	Capital expenditures	—				(12.6		)		(105.7		)		—				(118.3		)
	Net cash used in continuing investing activities	—				(12.6		)		(105.7		)		—				(118.3		)
	Cash Flows from Continuing Financing Activities:
	Proceeds from issuance of common units of SunCoke	—				—				90.5				—				90.5
	Energy Partners, L.P., net of offering costs
	Proceeds from issuance of long-term debt	—				—				268.1				—				268.1
	Repayment of long-term debt	—				—				(276.5		)		—				(276.5		)
	Debt issuance costs	—				—				(5.8		)		—				(5.8		)
	Proceeds from revolving facility	—				—				40				—				40
	Repayment of revolving facility	—				—				(80.0		)		—				(80.0		)
	Cash distributions to noncontrolling interests	—				—				(32.3		)		—				(32.3		)
	Shares repurchased	(85.1		)		—				—				—				(85.1		)
	Proceeds from exercise of stock options	2.9				—				—				—				2.9
	Excess tax benefit from share-based awards	0.3				—				—				—				0.3
	Dividends paid	(3.8		)		—				—				—				(3.8		)
	Net increase (decrease) in advances from affiliate	82.5				(57.0		)		(25.5		)		—				—
	Net cash used in continuing financing activities	(3.2		)		(57.0		)		(21.5		)		—				(81.7		)
	Net decrease in cash and cash equivalents from continuing operations	—				(57.7		)		(12.3		)		—				(70.0		)
	Cash Flows from Discontinued Operations:
	Cash flows from discontinued operations - operating activities	—				(17.7		)		—				—				(17.7		)
	Cash flows from discontinued operations - investing activities	—				(6.9		)		—				—				(6.9		)
	Net decrease in cash and cash equivalents from discontinued operations	—				(24.6		)		—				—				(24.6		)
	Net decrease in cash and cash equivalents	—				(82.3		)		(12.3		)		—				(94.6		)
	Cash and cash equivalents at beginning of year	—				184.7				48.9				—				233.6
	Cash and cash equivalents at end of year	$	—			$	102.4			$	36.6			$	—			$	139
	SunCoke Energy, Inc.
	Condensed Consolidating Statement of Cash Flows
	Year Ended December 31, 2013
	(Dollars in millions)
			Issuer				Guarantor				Non-				Combining				Total
							Subsidiaries				Guarantor				and
											Subsidiaries				Consolidating
											Adjustments
Cash Flows from Continuing Operating Activities:
Net income		$	25			$	64.5			$	105.4			$	(144.8	)		$	50.1
Adjustments to reconcile net income to net cash (used in) provided by continuing operating activities:
Loss from discontinued operations, net of tax		—				15.5				—				—				15.5
Depreciation and amortization expense		—				25.2				51.9				—				77.1
Deferred income tax (benefit) expense		—				0.5				—				—				0.5
Payments in excess of expense for retirement plans		—				(5.3		)		(0.1		)		—				(5.4		)
Share-based compensation expense		7.6				—				—				—				7.6
Equity in earnings of subsidiaries		(56.2		)		(88.6		)		—				144.8				—
Loss from equity method investment		—				—				2.2				—				2.2
Changes in working capital pertaining to continuing operating activities (net of acquisitions):
Receivables		—				(23.6		)		6.5				—				(17.1		)
Inventories		—				14.8				16.1				—				30.9
Accounts payable		(0.6		)		4.2				21.6				—				25.2
Accrued liabilities		—				(6.1		)		(16.7		)		—				(22.8		)
Interest payable		(2.1		)		(7.3		)		11.9				—				2.5
Income taxes		(23.5		)		26.4				(13.0		)		—				(10.1		)
Accrual for black lung benefits		—				(2.4		)		—								(2.4		)
Other		7.1				4.1				(8.3		)		—				2.9
Net cash (used in) provided by continuing operating activities		(42.7		)		21.9				177.5				—				156.7
Cash Flows from Continuing Investing Activities:
Capital expenditures		—				(19.8		)		(112.5		)		—				(132.3		)
Acquisition of businesses, net of cash acquired		—				—				(113.3		)		—				(113.3		)
Equity method investment in VISA SunCoke Limited		—				—				(67.7		)		—				(67.7		)
Net cash used in continuing investing activities		—				(19.8		)		(293.5		)		—				(313.3		)
Cash Flows from Continuing Financing Activities:
Proceeds from issuance of common units of SunCoke		—				—				237.8				—				237.8
Energy Partners, L.P., net of offering costs
Proceeds from issuance of long-term debt		—				—				150				—				150
Repayment of long-term debt		—				—				(225.0		)		—				(225.0		)
Debt issuance costs		(1.6		)		—				(5.3		)		—				(6.9		)
Proceeds from revolving facility		—				—				40				—				40
Cash distributions to noncontrolling interests		—				—				(17.8		)		—				(17.8		)
Shares repurchased		(10.9		)		—				—				—				(10.9		)
Proceeds from exercise of stock options		2.5				—				—				—				2.5
Net increase (decrease) in advances from affiliate		52.7				(5.6		)		(47.1		)		—				—
Net cash provided by (used in) continuing financing activities		42.7				(5.6		)		132.6				—				169.7
Net (decrease) increase in cash and cash equivalents from continuing operations		—				(3.5		)		16.6				—				13.1
Cash Flows from Discontinued Operations:
Cash flows from discontinued operations - operating activities		—				(5.4		)		—				—				(5.4		)
Cash flows from discontinued operations - investing activities		—				(13.3		)		—				—				(13.3		)
Net decrease in cash and cash equivalents from discontinued operations		—				(18.7		)		—				—				(18.7		)
Net (decrease) increase in cash and cash equivalents		—				(22.2		)		16.6				—				(5.6		)
Cash and cash equivalents at beginning of year		—				206.9				32.3				—				239.2
Cash and cash equivalents at end of year		$	—			$	184.7			$	48.9			$	—			$	233.6
SunCoke Energy, Inc.
Condensed Combining and Consolidating Statement of Cash Flows
December 31, 2012
(Dollars in millions)
		Issuer				Guarantor				Non-				Combining				Total
						Subsidiaries				Guarantor				and
										Subsidiaries				Consolidating
														Adjustments
Cash Flows from Continuing Operating Activities:
Net income		$	98.8			$	148.5			$	89.6			$	(234.4	)		$	102.5
Adjustments to reconcile net income to net cash (used in) provided by continuing operating activities:
Income from discontinued operations, net of tax		—				(20.5		)		—				—				(20.5		)
Depreciation and amortization expense		—				22.3				42.7				—				65
Deferred income tax (benefit) expense		(1.0		)		(7.9		)		39.3				—				30.4
Payments in excess of expense for retirement plans		—				(9.6		)		—				—				(9.6		)
Share-based compensation expense		6.7				—				—				—				6.7
Equity in earnings (loss) of subsidiaries		(138.9		)		(95.5		)		—				234.4				—
Changes in working capital pertaining to continuing operating activities (net of acquisitions):
Receivables		—				(7.8		)		2.1				—				(5.7		)
Inventories		—				35.5				22.3				—				57.8
Accounts payable		0.5				(55.9		)		(13.8		)		—				(69.2		)
Accrued liabilities		—				12.8				(1.8		)		—				11
Interest payable		(0.2		)		7.3				(7.3		)		—				(0.2		)
Income taxes		(17.2		)		(1.1		)		0.7				—				(17.6		)
Accrual for black lung benefits		—				1.3				—								1.3
Other		(4.9		)		(17.0		)		14				—				(7.9		)
Net cash (used in) provided by continuing operating activities		(56.2		)		12.4				187.8				—				144
Cash Flows from Continuing Investing Activities:
Capital expenditures		—				(20.9		)		(33.3		)		—				(54.2		)
Net cash used in continuing investing activities		—				(20.9		)		(33.3		)		—				(54.2		)
Cash Flows from Continuing Financing Activities:
Repayment of long-term debt		(3.3		)		—				—				—				(3.3		)
Cash distributions to noncontrolling interests		—				—				(2.3		)		—				(2.3		)
Shares repurchased		(9.4		)		—				—				—				(9.4		)
Proceeds from exercise of stock options		4.7				—				—				—				4.7
Net increase (decrease) in advances from affiliate		64.2				73.8				(138.0		)		—				—
Net cash provided by (used in) continuing financing activities		56.2				73.8				(140.3		)		—				(10.3		)
Net increase in cash and cash equivalents from continuing operations		—				65.3				14.2				—				79.5
Cash Flows from Discontinued Operations:
Cash flows from discontinued operations - operating activities		—				62.1				—				—				62.1
Cash flows from discontinued operations - investing activities		—				(29.9		)		—				—				(29.9		)
Net increase in cash and cash equivalents from discontinued operations		—				32.2				—				—				32.2
Net increase in cash and cash equivalents		—				97.5				14.2				—				111.7
Cash and cash equivalents at beginning of year		—				109.4				18.1				—				127.5
Cash and cash equivalents at end of year		$	—			$	206.9			$	32.3			$	—			$	239.2

General_and_Basis_of_Presentat1

General and Basis of Presentation (Details) (USD $)	0 Months Ended				12 Months Ended			0 Months Ended
In Millions, except Share data, unless otherwise specified	9-May-14	Jan. 24, 2013	Jan. 17, 2012	Jul. 26, 2011	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Mar. 18, 2013	Jan. 13, 2015	Jul. 18, 2011
					T			T
General (Textual) [Abstract]
Coal Mining, proven and probable reserves (in tons)					110,000,000
Quantity of metallurgical coal sold (in tons)					1,500,000
Quantity of thermal sold (in tons)					100,000
Common stock held (as a percent)										100.00%
IPO of common stock (in shares)				13,340,000
Ownership of company (as a percent)				19.10%
Common shares outstanding (in shares)				56,660,000
Percentage of parent ownership (as a percent)				80.90%
Share of common stock received (in shares)			0.53046456
Proceeds from issuance of common units of SunCoke Energy Partners, L.P., net of offering costs					$90.50	$237.80	$0
Direct costs related to increase in ownership interest		24.7
Accrual for Sales Volume Discounts Payable Current					0	13.6
Ownership interest of general partnership (as a percent)	2.00%				2.00%
Interest in partnership (as a percent)					56.00%	55.90%
Ownership percentage held by public unitholders	43.90%				44.00%
United States
General (Textual) [Abstract]
Number of cokemaking facilities					5
Cokemaking capacity (in tons)					4,200,000
Brazil
General (Textual) [Abstract]
Number of cokemaking facilities					1
Cokemaking capacity (in tons)					1,700,000
VISA SunCoke Limited
General (Textual) [Abstract]
Cokemaking facility capacity (in tons)					440,000			440,000
IPO
General (Textual) [Abstract]
IPO of common stock (in shares)		13,500,000
Proceeds from issuance of common units of SunCoke Energy Partners, L.P., net of offering costs		231.8
Interest in partnership (as a percent)		55.90%
IPO | Public
General (Textual) [Abstract]
Interest in partnership (as a percent)		42.10%
Interest Rate Swap | IPO
General (Textual) [Abstract]
Direct costs related to increase in ownership interest							6
Haverhill and Granite City | IPO
General (Textual) [Abstract]
Proceeds from Partnership offering used		67			119
Haverhill
General (Textual) [Abstract]
Accrual for Sales Volume Discounts Payable Current		$12.40
Kanawha River Terminals LLC
General (Textual) [Abstract]
Coal handling capacity (in tons)					30,000,000
Haverhill Coke Company LLC and Middletown Coke Company LLC
General (Textual) [Abstract]
Interest in partnership (as a percent)	54.10%				54.00%
Haverhill Coke Company LLC and Middletown Coke Company LLC | SunCoke Energy Partners, L.P.
General (Textual) [Abstract]
Additional interest sold (as a percent)	33.00%
Subsequent Event
General (Textual) [Abstract]
Ownership interest of general partnership (as a percent)									2.00%
Interest in partnership (as a percent)									56.10%
Ownership percentage held by public unitholders									41.90%
Subsequent Event | Granite City
General (Textual) [Abstract]
Ownership interest of general partnership (as a percent)									2.00%
Interest in partnership (as a percent)									25.00%
Subsequent Event | Granite City | SunCoke Energy Partners, L.P.
General (Textual) [Abstract]
Additional interest sold (as a percent)									75.00%

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Details) (USD $)	0 Months Ended	12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Aug. 16, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
		Employee
Summary of Significant Accounting Policies (Textual) [Abstract]
Foreign currency transaction gain (loss)		($0.30)	($1.50)
Capitalized interest costs		3.2	1	0.1
Number of employees		1,202
Percentage of domestic employees		2.00%
Labor agreement term (in years)	3 years
Vitoria, Brazil
Summary of Significant Accounting Policies (Textual) [Abstract]
Number of employees		278
Date on which agreement expires		31-Oct-15
Maximum
Summary of Significant Accounting Policies (Textual) [Abstract]
Revenue recognized for contingent rentals (as a percent)		10.00%	10.00%	10.00%
Cokemaking Operations
Summary of Significant Accounting Policies (Textual) [Abstract]
Percentage of domestic employees		26.00%
Coke and energy plant, machinery and equipment | Minimum
Summary of Significant Accounting Policies (Textual) [Abstract]
Coke and energy plant, machinery and equipment useful life (in years)		25 years
Coke and energy plant, machinery and equipment | Maximum
Summary of Significant Accounting Policies (Textual) [Abstract]
Coke and energy plant, machinery and equipment useful life (in years)		30 years
Service Life | Jewell
Summary of Significant Accounting Policies (Textual) [Abstract]
Additional depreciation recorded due to change in estimated useful life		1
Depreciation per common share		$0.01
Indiana Harbor | Service Life
Summary of Significant Accounting Policies (Textual) [Abstract]
Additional depreciation recorded due to change in estimated useful life		$15.60	$9.50	$2.20
Depreciation per common share		$0.23	$0.14	$0.03

Coal_Impairment_Charges_and_Di2

Coal Impairment Charges and Discontinued Operations Textuals (Details) (USD $)	3 Months Ended		12 Months Ended				48 Months Ended	0 Months Ended	1 Months Ended	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2015
								employee
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets			$1,998.10	$2,243.90			$1,998.10	1,998.10	1,998.10
Liabilities			1,292.70	1,411.60			1,292.70	1,292.70	1,292.70
Asset impairment			16.8	0	0
Asset impairment			16.8	0	0
Impairment of Long-Lived Assets Held-for-use	15.1		16.8
Charges		1.4	2.1	1.3	0.6	8.4	12.4
Coal Mining Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Asset impairment			150.3
Asset impairment	97.1		133.5							27.9
Impairment of Long-Lived Assets to be Disposed of, Net of Tax			81.9
Reduction in coal mining production (as a percent)									50.00%
Number of coal mining positions eliminated								400
Employee Severance
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Charges			1.4	0.1	0.5	5.5	7.5
Employee Severance | Coal Mining Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Charges			12.5
Contract Termination
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Charges			0.7	1.2	0.1	2	4
Contract Termination | Coal Mining Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Charges			6
Other Segments
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total legacy costs			17.1	0.4	3.9
Increase (Decrease) in Estimated Black Lung Liability			14.3	-0.3	3.3
Black Lung Benefit
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Increase (Decrease) in Estimated Black Lung Liability			14.3	-0.3	3.3
Legacy Assets | Other Segments
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets			12.9	30.5			12.9	12.9	12.9
Legacy Liabilities | Other Segments
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Liabilities			86.9	68.6			86.9	86.9	86.9
Scenario, Forecast | Minimum | Coal Mining Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Expected exit and disposal costs											1.5
Scenario, Forecast | Maximum | Coal Mining Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Expected exit and disposal costs											$4.50

Coal_Impairment_Charges_and_Di3

Coal Impairment Charges and Discontinued Operations Schedule of Assets Held for Sale (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Balance Sheet Related Disclosures [Abstract]
Total current liabilities held for sale	$37.40				$25.90				$37.40	$25.90
Income Statement [Abstract]
Depreciation, depletion and amortization									10.2	18.9	16
Income tax benefit (expense)									66.2	9.7	-5.3
(Loss) income from discontinued operations, net of tax	-40.1	-18.5	-41.2	-6.2	-4.4	-3.6	-2.8	-4.7	-106	-15.5	20.5
Coal Mining Business
Balance Sheet Related Disclosures [Abstract]
Receivables	2.8				6.2				2.8	6.2
Inventories	8.8				6.7				8.8	6.7
Properties, plants and equipment, net	31.1				0				31.1	0
Lease and mineral rights, net	18.6				0				18.6	0
Other current assets	3.5				0				3.5	0
Valuation allowance	-45.5				0				-45.5	0
Total current assets held for sale	19.3				12.9				19.3	12.9
Properties, plants and equipment, net	0				85.2				0	85.2
Lease and mineral rights, net	0				52.8				0	52.8
Goodwill and other intangible assets, net	0				6				0	6
Other assets	0				2.1				0	2.1
Total assets held for sale	19.3				159				19.3	159
Accounts payable	10.4				15.9				10.4	15.9
Accrued liabilities	19.9				10				19.9	10
Asset retirement obligations	7.1				0				7.1	0
Total current liabilities held for sale	37.4				25.9				37.4	25.9
Deferred income taxes	0				21.9				0	21.9
Asset retirement obligations	0				7				0	7
Other deferred credits and liabilities	0				4.4				0	4.4
Total liabilities held for sale	37.4				59.2				37.4	59.2
Income Statement [Abstract]
Total revenues									31.1	62.2	49.4
Cost of products sold and operating expenses									38.8	65.5	4.5
Selling, general and administrative expenses									20.8	3	3.1
Depreciation, depletion and amortization									10.2	18.9	16
Asset and goodwill impairment									133.5	0	0
Pre-tax (loss) income from discontinued operations									-172.2	-25.2	25.8
Income tax benefit (expense)									66.2	9.7	-5.3
(Loss) income from discontinued operations, net of tax									($106)	($15.50)	$20.50

DropDown_Transaction_Details

Drop-Down Transaction (Details) (USD $)	0 Months Ended		12 Months Ended
	9-May-14	Jul. 26, 2011	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Business Acquisition [Line Items]
Ownership interest of general partnership (as a percent)	2.00%		2.00%
Interest in partnership (as a percent)			56.00%	55.90%
Ownership percentage held by public unitholders	43.90%		44.00%
Decrease in noncontrolling interest			$0
Debt assumed			651,500,000	689,100,000
Shares issued		13,340,000
Proceeds from issuance of common units of SunCoke Energy Partners, L.P., net of offering costs			90,500,000	237,800,000	0
Haverhill Coke Company LLC and Middletown Coke Company LLC
Business Acquisition [Line Items]
Interest in partnership (as a percent)	54.10%		54.00%
SunCoke Energy Partners, L.P. | Haverhill Coke Company LLC and Middletown Coke Company LLC
Business Acquisition [Line Items]
Additional interest sold (as a percent)	33.00%
Consideration for additional interest sold	365,000,000
Decrease in noncontrolling interest			83,700,000
Value received from drop-down transaction	10,400,000
Market premium	11,400,000
Cash proceeds received from drop-down transaction	3,400,000
Consideration withheld to pre-fund anticipated environmental remediation costs	7,000,000
Proceeds from Issuance of Private Placement	263,100,000
Common Units | SunCoke Energy Partners, L.P.
Business Acquisition [Line Items]
Proceeds from Issuance of Private Placement			1,800,000
Common Units | SunCoke Energy Partners, L.P. | Haverhill Coke Company LLC and Middletown Coke Company LLC
Business Acquisition [Line Items]
Total shares received from drop-down transaction	2,700,000
Value received from drop-down transaction	80,000,000
Shares issued	3,200,000
Proceeds from issuance of common units of SunCoke Energy Partners, L.P., net of offering costs	88,700,000
General Partner | SunCoke Energy Partners, L.P. | Haverhill Coke Company LLC and Middletown Coke Company LLC
Business Acquisition [Line Items]
Value received from drop-down transaction	3,300,000
Term Loans
Business Acquisition [Line Items]
Debt assumed		300,000,000	0	99,100,000
Term Loans | SunCoke Energy Partners, L.P. | Haverhill Coke Company LLC and Middletown Coke Company LLC
Business Acquisition [Line Items]
Debt assumed	271,300,000
Partnership notes, due 2020
Business Acquisition [Line Items]
Debt assumed			411,500,000	150,000,000
Interest rate (as a percent)			7.38%	7.38%
Partnership notes, due 2020 | Haverhill Coke Company LLC and Middletown Coke Company LLC
Business Acquisition [Line Items]
Proceeds to fund interest	5,000,000
Partnership notes, due 2020 | SunCoke Energy Partners, L.P.
Business Acquisition [Line Items]
Debt assumed	250,000,000
Interest rate (as a percent)	7.38%

DropDown_Transaction_Effects_o

Drop-Down Transaction Effects of Changes in Company's Ownership (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Business Acquisition [Line Items]
Net income attributable to SunCoke Energy, Inc.	($65.40)	($3.60)	($49.10)	($8)	$11.10	$6.20	$5.70	$2.10	($126.10)	$25	$98.80
Decrease in noncontrolling interest									0
SunCoke Energy Partners, L.P. | Haverhill Coke Company LLC and Middletown Coke Company LLC
Business Acquisition [Line Items]
Net income attributable to SunCoke Energy, Inc.									-126.1
Decrease in noncontrolling interest									83.7
Deconsolidation, Gain (Loss), Amount									($42.40)

Acquisitions_Details

Acquisitions (Details) (USD $)	0 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Aug. 30, 2013	Oct. 01, 2013	Dec. 31, 2013
SunCoke Lake Terminal LLC
Consideration:
Fair value of total consideration transferred	$28.60
Recognized amounts of identifiable assets acquired and liabilities assumed:
Property and equipment	25.9
Inventory	2.7
Kanawha River Terminals LLC
Business Acquisition [Line Items]
Consideration transferred, cash payment		44.7	84.7
Consideration:
Fair value of total consideration transferred		84.7
Recognized amounts of identifiable assets acquired and liabilities assumed:
Current assets		5.2
Property and equipment		67.2
Intangible assets		7.9
Current liabilities		-3.7
Other long-term liabilities		-0.1
Total identifiable net assets assumed		76.5
Goodwill		$8.20	$8.20

Acquisitions_Details_Textual

Acquisitions (Details Textual) (USD $)	1 Months Ended	3 Months Ended								12 Months Ended			0 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Aug. 30, 2013	Oct. 01, 2013
Business Acquisition [Line Items]
Revenue, Net		$378.30	$367.50	$364.20	$351.50	$377.40	$373.10	$383.70	$438	$1,461.50	$1,572.20	$1,853.70
Intersegment sales										1,472.70	1,585.50	1,864.70
Revenues										1,472.70	1,585.50	1,864.70
Operating (loss) income										109.8	136.5	147.6
Ownership percentage (as a percent)		100.00%								100.00%
Term of coal handling and blending services contract (in years)	10 years
SunCoke Lake Terminal LLC
Business Acquisition [Line Items]
Fair value of total consideration transferred													28.6
Intersegment sales										13.4	4.6
Revenues										13.4	4.6
Operating (loss) income										1.7	1.9
Kanawha River Terminals LLC
Business Acquisition [Line Items]
Fair value of total consideration transferred														84.7
Consideration transferred, cash payment											84.7			44.7
Borrowing incurred due to acquisition														40
Coal handling capacity (in tons)										30,000,000
Goodwill						8.2					8.2			8.2
Intersegment sales										41.6	9
Revenues										41.6	9
Operating (loss) income										5	1
DTE Energy Company | SunCoke Lake Terminal LLC
Business Acquisition [Line Items]
Payments to third party investor													1.8
Ownership percentage (as a percent)													15.00%
Indiana Harbor | SunCoke Lake Terminal LLC
Business Acquisition [Line Items]
Term of coal handling and blending services contract (in years)	10 years
Coal Logistics Intersegment Sales
Business Acquisition [Line Items]
Revenue, Net										18.8	5.5	0
Coal Logistics Intersegment Sales | SunCoke Lake Terminal LLC
Business Acquisition [Line Items]
Revenue, Net										13.1	4.3
Coal Logistics Intersegment Sales | Kanawha River Terminals LLC
Business Acquisition [Line Items]
Revenue, Net										$5.70	$1.20

Equity_Method_Investment_Detai

Equity Method Investment (Details Textual) (USD $)	12 Months Ended			0 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Mar. 18, 2013
				T
Schedule of Equity Method Investments [Line Items]
Ownership percentage (as a percent)	100.00%
Impairment charge	$16.80	$0	$0
Loss from equity method investment	35	2.2	0
VISA SunCoke Limited
Schedule of Equity Method Investments [Line Items]
Cokemaking facility capacity (in tons)	440,000			440,000
Investment in joint venture				67.7
Ownership percentage (as a percent)	49.00%			49.00%
Impairment charge	$30.50
VISA Steel | VISA SunCoke Limited
Schedule of Equity Method Investments [Line Items]
Ownership percentage (as a percent)				51.00%

Customer_Concentrations_Detail

Customer Concentrations (Details Textual) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Customer Concentrations (Textual) [Abstract]
Sales and other operating revenue	$378.30	$367.50	$364.20	$351.50	$377.40	$373.10	$383.70	$438	$1,461.50	$1,572.20	$1,853.70
Customer Concentration Risk
Customer Concentrations (Textual) [Abstract]
Quantity of coke sold to three primary customers (in tons)									4,200,000
Number of primary customers in U.S									3
Customer Concentration Risk | ArcelorMittal | Accounts Receivable
Customer Concentrations (Textual) [Abstract]
Accounts receivable due	48.5								48.5
Customer Concentration Risk | ArcelorMittal | Sales Revenue
Customer Concentrations (Textual) [Abstract]
Sales and other operating revenue									781.6	826.7	1,018.90
Sales to customers (as a percent)									53.00%	53.00%	56.00%
Customer Concentration Risk | AK Steel | Accounts Receivable
Customer Concentrations (Textual) [Abstract]
Accounts receivable due	14.5								14.5
Customer Concentration Risk | AK Steel | Sales Revenue
Customer Concentrations (Textual) [Abstract]
Sales and other operating revenue									402.4	468.6	539.4
Sales to customers (as a percent)									27.00%	30.00%	29.00%
Customer Concentration Risk | U.S Steel | Accounts Receivable
Customer Concentrations (Textual) [Abstract]
Accounts receivable due	6.4								6.4
Customer Concentration Risk | U.S Steel | Sales Revenue
Customer Concentrations (Textual) [Abstract]
Sales and other operating revenue									232.3	245.8	273.7
Sales to customers (as a percent)									16.00%	16.00%	15.00%
Customer Concentration Risk | ArcelorMittal Brasil | Accounts Receivable
Customer Concentrations (Textual) [Abstract]
Preferred dividend									9.5
Customer Concentration Risk | ArcelorMittal Brasil | Other Income
Customer Concentrations (Textual) [Abstract]
Preferred dividend									$9.50	$9.50	$9.40

Income_Taxes_Details_1

Income Taxes (Details 1) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
The components of income before income tax expense
Domestic	$35.20	$71.70	$92.20
Foreign	11.4	12.5	7.8
Total	$46.60	$84.20	$100

Income_Taxes_Details_2

Income Taxes (Details 2) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income taxes currently payable (receivable):
U.S. federal	$8	$9.70	($16.20)
State	2.4	3.4	1.1
Foreign	3	2.8	2.7
Total taxes currently payable (receivable)	13.4	15.9	-12.4
Deferred tax (benefit):
U.S. federal	-7.5	-5.7	31
State	1.5	6.2	-0.6
Total deferred tax	-6	0.5	30.4
Income tax expense	$7.40	$16.40	$18

Income_Taxes_Details_3

Income Taxes (Details 3) (USD $)	12 Months Ended			0 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 22, 2014
Reconciliation of income tax expense
Income tax expense at 35 percent U.S. statutory rate	$16.30	$29.50	$35
Income attributable to noncontrolling interests	-8.7	-8.9	-1.3
Nonconventional fuel credit	0	-9.5	-16
State and other income taxes, net of federal income tax effects	2.9	5.2	0.3
Return-to-provision adjustments	-1.8	-0.9	-1.1
Change in valuation allowance	11.1	0.9	-0.1
Impact of tax sharing agreement	-0.8	0.4	0
Domestic production activity deduction	-0.7	-0.5	-0.3
Investment in subsidiary	-11.9	0	0
Other	1	0.2	1.5
Income tax expense	7.4	16.4	18
Reconciliation of income tax expense (as a percent)
Income tax expense at 35 percent U.S. statutory rate	35.00%	35.00%	35.00%
Income attributable to noncontrolling interests	-18.60%	-10.60%	-1.30%
Nonconventional fuel credit	0.00%	-11.30%	-16.00%
State and other income taxes, net of federal income tax effects	6.20%	6.20%	0.30%
Return-to-provision adjustments	-4.00%	-1.10%	-1.10%
Change in valuation allowance	23.70%	1.10%	0.00%
Impact of tax sharing agreement	-1.70%	0.50%	0.00%
Domestic production activity deduction	-1.40%	-0.60%	-0.30%
Investment in subsidiary	-25.50%	0.00%	0.00%
Other	2.10%	0.30%	1.50%
Total effective income tax expense	15.80%	19.50%	18.10%
Valuation allowance	14.7	3.3
Harold Keene Coal Co [Member]
Reconciliation of income tax expense (as a percent)
Interest in Harold Keene Coal Companies sold				100.00%
Valuation allowance				$9.80

Income_Taxes_Details_4

Income Taxes (Details 4) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Deferred tax assets:
Retirement benefit liabilities	$14.60	$13.40
Black lung benefit liabilities	16.8	12.5
Share-based compensation	6.9	5
Federal tax credit carryforward	19.8	19.3
State tax credit carryforward, net of federal income tax effects	9.2	8.6
State net operating loss carryforward, net of federal income tax effects	5.4	5.3
Other liabilities not yet deductible	18.7	9.8
Investment in subsidiaries	11.8	0
Total deferred tax assets	103.2	73.9
Less valuation allowance	-14.7	-3.3
Deferred tax asset, net	88.5	70.6
Deferred tax liabilities:
Properties, plants and equipment	-84.3	-118.1
Investment in partnerships	-299.7	-294.6
Total deferred tax liabilities	-384	-412.7
Net deferred tax liability	($295.50)	($342.10)

Income_Taxes_Details_5

Income Taxes (Details 5) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Net deferred income tax liability classified in consolidated balance sheets
Current asset	$26.40	$12.60
Noncurrent liability	-321.9	-354.7
Net deferred tax liability	($295.50)	($342.10)

Income_Taxes_Details_Textual

Income Taxes (Details Textual) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jul. 18, 2011
Income Tax Disclosure [Abstract]
Federal tax credit carryforward	$19.80	$19.30
State net operating loss and tax credit carryforwards	14.6
Income tax expense at U.S. statutory rate (as a percent)	35.00%	35.00%	35.00%
Increase decrease in percentage of stock ownership (as a percent)	50.00%
Eliminated tax amount, current and deferred				229.2
Amount reduced from equity			$85.80
State and foreign income tax returns subject to examination period (in years)	3 years
State and foreign income tax returns subject to examination period maximum (in years)	5 years

Inventories_Details

Inventories (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Components of inventories
Coal	$96.50	$81.20
Coke	6.9	11.8
Materials, supplies and other	35.7	35.6
Total inventories	$139.10	$128.60

Properties_Plants_and_Equipmen2

Properties, Plants and Equipment, Net (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Components of net properties, plants and equipment
Gross investment, at cost	$1,970	$1,895.20
Less: Accumulated depreciation	-503.4	-436.3
Total properties, plants and equipment, net	1,466.60	1,458.90
Coke and energy plant, machinery and equipment
Components of net properties, plants and equipment
Gross investment, at cost	1,676.20	1,596.50
Less: Accumulated depreciation	-262.4	-228.9
Coal logistics plant, machinery and equipment
Components of net properties, plants and equipment
Gross investment, at cost	83.6	82.6
Land and land improvements
Components of net properties, plants and equipment
Gross investment, at cost	82.5	82.5
Construction-in-progress
Components of net properties, plants and equipment
Gross investment, at cost	62.4	57.3
Other
Components of net properties, plants and equipment
Gross investment, at cost	$65.30	$76.30

Properties_Plants_and_Equipmen3

Properties, Plants and Equipment, Net (Details Textual) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Properties Plants and Equipment, Net (Textual) [Abstract]
Accumulated depreciation	$503.40	$436.30
Coke and energy plant, machinery and equipment
Properties Plants and Equipment, Net (Textual) [Abstract]
Coke and energy plant, machinery and equipment	1,155.10	1,133.10
Accumulated depreciation	$262.40	$228.90

Asset_Retirement_Obligations_D

Asset Retirement Obligations (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of changes in the asset retirement obligation
Beginning Balance	$10.90	$7.70
Liabilities incurred	2	3.1
Liabilities settled	0	0
Accretion expense	0.9	0.6
Revisions in estimated cash flows	1.3	-0.5
Ending Balance	$15.10	$10.90

Goodwill_and_Other_Intangible_2

Goodwill and Other Intangible Assets (Details 1) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$15.60	$15.60
Accumulated Amortization	5.2	3.7
Net	10.4	11.9
Customer Contracts
Finite-Lived Intangible Assets [Line Items]
Weighted - Average Remaining Amortization (in years)	6 years
Gross Carrying Amount	7.7	7.7
Accumulated Amortization	4.2	3.6
Net	3.5	4.1
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted - Average Remaining Amortization (in years)	10 years
Gross Carrying Amount	6.7	6.7
Accumulated Amortization	0.7	0.1
Net	6	6.6
Trade name
Finite-Lived Intangible Assets [Line Items]
Weighted - Average Remaining Amortization (in years)	4 years
Gross Carrying Amount	1.2	1.2
Accumulated Amortization	0.3	0
Net	$0.90	$1.20

Goodwill_and_Other_Intangible_3

Goodwill and Other Intangible Assets (Details Textual) (USD $)	12 Months Ended		0 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Oct. 01, 2013
Business Acquisition [Line Items]
Total amortization expense	$1.50	$0.80
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2015 Estimated amortization expense	1.4
2016 Estimated amortization expense	1.4
2017 Estimated amortization expense	1.4
2018 Estimated amortization expense	1.4
2019 Estimated amortization expense	1.2
Kanawha River Terminals LLC
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross		84.7	44.7
Goodwill		8.2	8.2
Domestic Coke
Business Acquisition [Line Items]
Goodwill	3.4	3.4
Coal Logistics
Business Acquisition [Line Items]
Goodwill	$8.20	$8.20

Retirement_Benefits_Plans_Deta

Retirement Benefits Plans (Details Textual) (USD $)	0 Months Ended	1 Months Ended	12 Months Ended			0 Months Ended	3 Months Ended	12 Months Ended
	Jan. 01, 2011	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 01, 2013	Jun. 30, 2013	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Years of service, less than	10 years
Threshold which participants have option of receiving a lump sum payout or annuity		$25,000	$25,000
Curtailment gain		2,500,000
Current portion of retirement liabilities classified in accrued liabilities		3,700,000	3,700,000	3,600,000
Anticipated employer contributions in next fiscal year			400,000
Allocation to investment income securities weighted average (as a percent)				100.00%
Health care cost trend assumption increased health care cost trend rates (as a percent)			7.50%	8.00%
Health care cost trend assumption increased health care cost trend rates (as a percent)			5.00%
Impact of health care cost trend rates on the total of service and interest cost components of postretirement benefits expense and APBO			100,000	100,000
Company's pretax income and the aggregate compensation levels of participating employees			8,000,000	7,400,000	6,200,000
Defined Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Curtailment of benefits			0	0
Amortization of net gains (losses)			900,000
Increase in accrued benefit due to plan termination			500,000	0
Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Curtailment of benefits			1,400,000	0
Curtailment gain			2,500,000	0	0
Amortization of net gains (losses)			800,000
Prior service benefit amortization			1,300,000
Increase in accrued benefit due to plan termination			0	0
Equity securities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, equity target plan asset allocation (as a percent)						66.00%	50.00%
Investment Grade Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, equity target plan asset allocation (as a percent)						34.00%	50.00%
Scenario, Forecast
Defined Benefit Plan Disclosure [Line Items]
Curtailment gain								$4,000,000

Retirement_Benefits_Plans_Defi

Retirement Benefits Plans (Defined Benefit Plan Expense (Benefit) Components) (Details) (Defined Benefit Plan, USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan
Defined benefit plan expense (benefit)
Interest cost on benefit obligations	$1.50	$1.30	$1.50
Expected return on plan assets	-1.8	-2.4	-1.8
Amortization of:
Actuarial losses	0.5	1	0.9
Benefit plan (benefit) expense, total	$0.20	($0.10)	$0.60

Retirement_Benefits_Plans_Post

Retirement Benefits Plans (Postretirement Benefit Plans (Benefit) Expense Components) (Details) (USD $)	1 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Amortization of:
Curtailment gain	($2.50)
Postretirement Benefit Plans
Postretirement benefit plans benefit
Service cost		0.2	0.3	0.3
Interest cost on benefit obligations		1.5	1.4	1.8
Amortization of:
Actuarial losses		0.9	1.5	1.6
Prior service benefit		-5.6	-5.7	-5.6
Curtailment gain		-2.5	0	0
Benefit plan (benefit) expense, net		($5.50)	($2.50)	($1.90)

Retirement_Benefits_Plans_Assu

Retirement Benefits Plans (Assumptions Used to Determine Defined Benefit Plan and Postretirement Benefit Plans Expense (Benefit) (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan
Defined benefit plan and postretirement benefit plans expense (benefit)
Discount Rate (as a percent)	4.55%	3.65%	4.25%
Long term expected rate of return on plan assets (as a percent)	4.90%	7.10%	6.25%
Postretirement Benefit Plans
Defined benefit plan and postretirement benefit plans expense (benefit)
Discount Rate (as a percent)	4.15%	3.30%	3.90%
Long term expected rate of return on plan assets (as a percent)	0.00%	0.00%	0.00%

Retirement_Benefits_Plans_Amou

Retirement Benefits Plans (Amounts Recognized as Components of Other Comprehensive (Loss) Income) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Retirement benefit plan funded status adjustments:
Actuarial (losses) gains	($4)	($1.90)	($1.90)
Total	2.6	-5.7	-1.6
Defined Benefit Plan
Reclassifications to earnings of:
Actuarial loss amortization	0.5	1	0.9
Prior service benefit amortization	0	0	0
Curtailment gain	0	0	0
Retirement benefit plan funded status adjustments:
Actuarial (losses) gains	3.9	-5.6	1.9
Prior service (cost) benefit	-0.5	0	0
Total	-3.9	6.6	-1
Postretirement Benefit Plans
Reclassifications to earnings of:
Actuarial loss amortization	0.9	1.5	1.6
Prior service benefit amortization	-5.6	-5.7	-5.6
Curtailment gain	-2.5	0	0
Retirement benefit plan funded status adjustments:
Actuarial (losses) gains	-0.2	-3.9	-0.4
Prior service (cost) benefit	0	0	3.9
Total	($7)	($0.30)	$0.30

Retirement_Benefits_Plans_Comp

Retirement Benefits Plans (Components of the Changes in Benefit Obligations and Fair Value of Plan Assets) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Components of the changes in benefit obligations and fair value of plan assets
Fair value of plan assets at end of year		$36.90
Defined Benefit Plan
Components of the changes in benefit obligations and fair value of plan assets
Benefit obligations at beginning of year	32.9	37.5
Service cost	0	0
Interest cost	1.5	1.3	1.5
Actuarial losses (gains)	7.2	-3.9
Plan amendments	0.5	0
Curtailment of benefits	0	0
Benefits paid	-2.2	-2
Benefit obligations at end of year	39.9	32.9	37.5
Fair value of plan assets at beginning of year	36.9	34.9
Actual income on plan assets	5.1	4
Benefits paid from plan assets	-2.2	-2
Fair value of plan assets at end of year	39.8	36.9	34.9
Net asset (liability) at end of year	-0.1	4
Postretirement Benefit Plans
Components of the changes in benefit obligations and fair value of plan assets
Benefit obligations at beginning of year	38.4	43.7
Service cost	0.2	0.3	0.3
Interest cost	1.5	1.4	1.8
Actuarial losses (gains)	1.2	-4
Plan amendments	0	0
Curtailment of benefits	-1.4	0
Benefits paid	-2.8	-3
Benefit obligations at end of year	37.1	38.4	43.7
Benefits paid from plan assets	-2.8	-3
Net asset (liability) at end of year	($37.10)	($38.40)

Retirement_Benefits_Plans_Cumu

Retirement Benefits Plans (Cumulative Amounts Not Yet Recognized in Net Income) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Defined Benefit Plan
Cumulative amounts not yet recognized in net income:
Actuarial losses	$13.50	$10.10
Prior service costs (benefits)	0.5	0
Accumulated other comprehensive loss (income) (before related tax benefit)	14	10.1
Postretirement Benefit Plans
Cumulative amounts not yet recognized in net income:
Actuarial losses	10	11.1
Prior service costs (benefits)	-8.4	-16.5
Accumulated other comprehensive loss (income) (before related tax benefit)	$1.60	($5.40)

Retirement_Benefits_Plans_Plan

Retirement Benefits Plans (Plan Assets in the Funded Defined Benefit Plan Measured at Fair Value, by Input Level) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Schedule of Plan assets in the funded defined benefit plan measured at fair value
Fair value of plan assets		$36.90
Quoted Prices in Active Markets for Identical Assets (Level 1)
Schedule of Plan assets in the funded defined benefit plan measured at fair value
Fair value of plan assets	39.8	36.9
Quoted Prices in Active Markets for Identical Assets (Level 1) | Cash and cash equivalents
Schedule of Plan assets in the funded defined benefit plan measured at fair value
Fair value of plan assets	0.4	0.9
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed income securities | Fixed income securities | Fixed income securities
Schedule of Plan assets in the funded defined benefit plan measured at fair value
Fair value of plan assets	$39.40	$36

Retirement_Benefits_Plans_Asse

Retirement Benefits Plans (Asset Allocations Attributable to the Defined Benefit Plan) (Details)	0 Months Ended	3 Months Ended
	Jan. 01, 2013	Jun. 30, 2013	Dec. 31, 2013
Asset allocations attributable to defined benefit plan and the target allocation of plan assets
Actual allocation of plan assets			100.00%
Equity securities
Asset allocations attributable to defined benefit plan and the target allocation of plan assets
Target allocation of plan assets	66.00%	50.00%
Fixed income securities
Asset allocations attributable to defined benefit plan and the target allocation of plan assets
Target allocation of plan assets	34.00%	50.00%

Retirement_Benefits_Plans_Expe

Retirement Benefits Plans (Expected Benefit Payments) (Details) (USD $)	Dec. 31, 2014
In Millions, unless otherwise specified
Defined Benefit Plan
Expected benefit payments
2015	$2.20
2016	2.3
2017	2.3
2018	2.3
2019	2.2
2020 through 2024	10.7
Postretirement Benefit Plans
Expected benefit payments
2015	3.7
2016	3.8
2017	3.5
2018	3.2
2019	3
2020 through 2024	$12.10

Retirement_Benefits_Plans_Deta1

Retirement Benefits Plans (Details 10)	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan
Measurement date for the Company's defined benefit plan and postretirement benefit plans
Discount rate (as a percent)	3.75%	4.55%
Postretirement Benefit Plans
Measurement date for the Company's defined benefit plan and postretirement benefit plans
Discount rate (as a percent)	3.45%	4.15%

Accrued_Liabilities_Details

Accrued Liabilities (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Accrued liabilities
Accrued sales discounts	$0	$13.60
Accrued benefits	21	23.5
Other taxes payable	10.4	9.8
Other	10.2	12.6
Total	$41.60	$59.50

Debt_Details

Debt (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Jul. 26, 2011	Jan. 23, 2013
Total debt, including the current portion of long-term debt
Total debt	$651,500,000	$689,100,000
Less: short-term debt, including current portion of long-term debt	0	41,000,000
Total long-term debt	651,500,000	648,100,000
Term loans, bearing interest at variable rates, due 2018, net of original issue discount of $1.0 million at December 31, 2013(1)
Total debt, including the current portion of long-term debt
Total debt	0	99,100,000	300,000,000
Discount on original issue	1,000,000	1,700,000
7.625 percent senior notes, due 2019 (bNotesb)
Total debt, including the current portion of long-term debt
Total debt	240,000,000	400,000,000
Interest rate (as a percent)	7.63%	7.63%	7.63%
7.375 percent senior notes, due 2020 (Partnership Notes), including original issue premium of $11.5 million at December 31, 2014.
Total debt, including the current portion of long-term debt
Total debt	411,500,000	150,000,000
Interest rate (as a percent)	7.38%	7.38%
Debt Instrument, Unamortized Premium				11,500,000
Revolving credit facility, due 2019 | Revolving credit facility, due 2019
Total debt, including the current portion of long-term debt
Total debt	$0	$40,000,000

Debt_Details_Textual

Debt (Details Textual) (USD $)	1 Months Ended	12 Months Ended			0 Months Ended		1 Months Ended	0 Months Ended
	Jul. 26, 2011	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jul. 26, 2011	Jan. 24, 2013	Jan. 31, 2013	Aug. 28, 2013	9-May-14	Aug. 15, 2011	Dec. 15, 2011	Jan. 23, 2013	Sep. 30, 2013	8-May-14
Debt (Textual) [Abstract]
Long-term Debt		$651,500,000	$689,100,000
Percent of principal amount repayable for term loan on quarterly basis (as a percent)	1.00%
Letters of credit outstanding under revolving facility		0
Repayments of long-term debt		276,500,000	225,000,000	3,300,000
Debt issuance cost		19,100,000
Repayments of Lines of Credit		80,000,000	0	0
Maturity year	2019
Redemption of notes as percentage of principal amount change of control event (as a percent)		101.00%
Redemption of notes as percentage of principal amount asset disposition (as percent)		100.00%
Debt issuance costs		5,800,000	6,900,000	0
Long-term Debt, Maturities, 2015		0
Long-term Debt, Maturities, 2016		0
Long-term Debt, Maturities, 2017		0
Long-term Debt, Maturities, 2018		0
Long-term Debt, Maturities, 2019		240,000,000
Aggregate notional amount for interest rate swap agreements										125,000,000
7.625% senior notes, due 2019
Debt (Textual) [Abstract]
Long-term Debt		240,000,000	400,000,000
Repayments of long-term debt					160,000,000
Senior notes	400,000,000				400,000,000
Interest rate (as a percent)	7.63%	7.63%	7.63%		7.63%
Term loans, bearing interest at variable rates, due 2018, net of original issue
Debt (Textual) [Abstract]
Period for term loan (in years)	7 years
Long-term Debt	300,000,000	0	99,100,000		300,000,000
Borrowed term loan											30,000,000
Debt discount	2,100,000				2,100,000
Partnership notes, due 2020
Debt (Textual) [Abstract]
Long-term Debt		411,500,000	150,000,000
Interest rate (as a percent)		7.38%	7.38%
Incremental Credit Facility
Debt (Textual) [Abstract]
Incremental facilities under credit agreement	75,000,000				75,000,000
Revolving Credit Facility
Debt (Textual) [Abstract]
The weighted-average interest rate for borrowings outstanding under credit agreement (as a percent)		4.06%
Revolving Credit Facility | Line of Credit
Debt (Textual) [Abstract]
Long-term Debt		0	40,000,000
IPO | Term loans, bearing interest at variable rates, due 2018, net of original issue
Debt (Textual) [Abstract]
Repayments of long-term debt						225,000,000
Unamortized debt issuance expense						2,900,000
Debt issuance cost							700,000
IPO | Partnership notes, due 2020
Debt (Textual) [Abstract]
Unamortized debt issuance expense												3,700,000
Senior notes												150,000,000
Interest rate (as a percent)												7.38%
Debt Issuance Cost Immediately Expensed		800,000
Redeem partnership note percentage (as a percent)						35.00%
IPO | Revolving Credit Facility with A Term Extending through January 2018
Debt (Textual) [Abstract]
Principal amount of term loan						100,000,000		150,000,000
Debt issuance cost						2,200,000		900,000
Amount outstanding under term loan and incremental facilities													40,000,000
Debt issuance costs			600,000
IPO | Uncommitted Incremental Revolving Credit Facility
Debt (Textual) [Abstract]
Incremental facilities under credit agreement								100,000,000
Credit Agreement | Revolving Credit Facility
Debt (Textual) [Abstract]
Period for term loan (in years)		5 years
Principal amount of term loan		150,000,000
Letters of credit outstanding under revolving facility		1,500,000
Remaining letters of credit agreement amount		148,500,000
Unused capacity commitment fee (as a percent)		0.35%
Credit Agreement and Partner Revolver
Debt (Textual) [Abstract]
Debt Instrument, Covenant, Leverage ratio, Maximum		3.75
Debt Instrument, Covenant, Interest Coverage Ratio, Minimum		2.75
SunCoke Energy Partners, L.P. | Line of Credit
Debt (Textual) [Abstract]
Long-term Debt									250,000,000					150,000,000
Remaining letters of credit agreement amount		250,000,000
Unused capacity commitment fee (as a percent)		0.40%
The weighted-average interest rate for borrowings outstanding under credit agreement (as a percent)		2.39%
Line of Credit Amendment Fee									1,800,000
SunCoke Energy Partners, L.P. | Partnership notes, due 2020
Debt (Textual) [Abstract]
Long-term Debt									250,000,000
Debt issuance cost									4,900,000
Interest rate (as a percent)									7.38%
Debt Issuance Cost Immediately Expensed									900,000
Proceeds from Issuance of Private Placement, Premium									13,100,000
SunCoke Energy Partners, L.P. | Revolving Credit Facility | Line of Credit
Debt (Textual) [Abstract]
Repayments of Lines of Credit									40,000,000
SunCoke Energy Partners, L.P. | Credit Agreement and Partner Revolver
Debt (Textual) [Abstract]
Debt Instrument, Covenant, Leverage ratio, Maximum		4
Debt Instrument, Covenant, Interest Coverage Ratio, Minimum		2.5
Haverhill Coke Company LLC and Middletown Coke Company LLC | Partnership notes, due 2020
Debt (Textual) [Abstract]
Proceeds to fund interest									5,000,000
Haverhill Coke Company LLC and Middletown Coke Company LLC | SunCoke Energy Partners, L.P.
Debt (Textual) [Abstract]
Proceeds from Issuance of Private Placement									263,100,000
Redemption premium									11,400,000
Extinguishment of Debt, Amount									3,100,000
Haverhill Coke Company LLC and Middletown Coke Company LLC | SunCoke Energy Partners, L.P. | Term loans, bearing interest at variable rates, due 2018, net of original issue
Debt (Textual) [Abstract]
Long-term Debt									271,300,000
Repayments of long-term debt									$99,900,000

Black_Lung_Benefit_Obligations1

Black Lung Benefit Obligations (Details Textual) (Black Lung Benefit, USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Black Lung Benefit
Black Lung Benefit Obligations (Textual) [Abstract]
Discount rate for period end liability (as a percent)	3.65%	4.65%	3.80%
Estimated liability	$43.90	$32.40
Black lung liability expense	$14.30	($0.30)	$3.30

Commitments_and_Contingent_Lia1

Commitments and Contingent Liabilities (Details) (USD $)	Dec. 31, 2014
In Millions, unless otherwise specified
Aggregate amount of future minimum annual rentals applicable to noncancelable operating leases and related subleases
2015	$4.10
2016	3.5
2017	2
2018	1.3
2019	1
2020-Thereafter	2.9
Total	$14.80

Commitments_and_Contingent_Lia2

Commitments and Contingent Liabilities (Details Textual) (USD $)	1 Months Ended	12 Months Ended			0 Months Ended	36 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 24, 2013	Dec. 31, 2014
Commitments and Contingent Liabilities (Textual) [Abstract]
Rental expense, net of sublease income		$7.90	$6.40	$4.80
Estimate possible loss		2.5				2.5
Cost of capital projects estimated for 2015 to 2016		50				50
Term of coal handling and blending services contract (in years)	10 years
Environmental contingency, project maintenance cost current estimate		100				100
Carried out cost of capital, ending period		2016
Carried out cost of capital,initial period		2015
Indiana Harbor Partnership
Commitments and Contingent Liabilities (Textual) [Abstract]
Percentage interest in the Indiana Harbor Partnership		15.00%				15.00%
IPO | Haverhill and Granite City
Commitments and Contingent Liabilities (Textual) [Abstract]
Proceeds from Partnership offering used		119			67
Environmental Issue
Commitments and Contingent Liabilities (Textual) [Abstract]
Estimate possible loss		125				125
Haverhill and Granite City
Commitments and Contingent Liabilities (Textual) [Abstract]
Civil penalty		2.2
Cost of capital projects since 2012						75
Indiana Harbor
Commitments and Contingent Liabilities (Textual) [Abstract]
Cost of capital projects since 2012		$25				$105

Restructuring_Details

Restructuring (Details) (USD $)	3 Months Ended	12 Months Ended				48 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2014
Aggregate restructuring charges
Charges	$1.40	$2.10	$1.30	$0.60	$8.40	$12.40
Employee- Related Costs
Aggregate restructuring charges
Charges		1.4	0.1	0.5	5.5	7.5
Asset Write-offs
Aggregate restructuring charges
Charges		0	0	0	0.9	0.9
Lease Terminations
Aggregate restructuring charges
Charges		$0.70	$1.20	$0.10	$2	$4

Restructuring_Details_1

Restructuring (Details 1) (USD $)	3 Months Ended	12 Months Ended				48 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2014
Accrued restructuring and related activity
Beginning Balance	$1.80	$1.80	$2	$2.50
Charges	1.4	2.1	1.3	0.6	8.4	12.4
Cash payments		-2	-1.5	-1.1
Ending Balance		1.9	1.8	2	2.5	1.9
Employee- Related Costs
Accrued restructuring and related activity
Beginning Balance	0.1	0.1	0.6	0.8
Charges		1.4	0.1	0.5	5.5	7.5
Cash payments		-1	-0.6	-0.7
Ending Balance		0.5	0.1	0.6	0.8	0.5
Lease Terminations
Accrued restructuring and related activity
Beginning Balance	1.7	1.7	1.4	1.7
Charges		0.7	1.2	0.1	2	4
Cash payments		-1	-0.9	-0.4
Ending Balance		$1.40	$1.70	$1.40	$1.70	$1.40

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Loss (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Components of accumulated other comprehensive (loss) income (net of related income taxes)
Balance at beginning of period	($14.10)	($7.90)
Other comprehensive loss before reclassifications	-0.8	-10
Amounts reclassified from accumulated other comprehensive loss	-4	-1.9	-1.9
Retirement benefit plans funded status adjustment	-2.6	5.7	1.6
Net current period other comprehensive income (loss)	-7.4	-6.2
Balance at end of period	-21.5	-14.1	-7.9
Benefit Plans
Components of accumulated other comprehensive (loss) income (net of related income taxes)
Balance at beginning of period	-2.8	-6.6
Other comprehensive loss before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive loss	-4	-1.9
Retirement benefit plans funded status adjustment	-2.6	5.7
Net current period other comprehensive income (loss)	-6.6	3.8
Balance at end of period	-9.4	-2.8
Tax benefit associated with benefit plans	6.2	1.9
Currency Translation Adjustments
Components of accumulated other comprehensive (loss) income (net of related income taxes)
Balance at beginning of period	-11.3	-1.3
Other comprehensive loss before reclassifications	-0.8	-10
Amounts reclassified from accumulated other comprehensive loss	0	0
Retirement benefit plans funded status adjustment	0	0
Net current period other comprehensive income (loss)	-0.8	-10
Balance at end of period	($12.10)	($11.30)

Accumulated_Other_Comprehensiv3

Accumulated Other Comprehensive Loss (Details1) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Amortization of Actuarial Losses and Prior Service Benefit [Abstract]
Prior service benefit and curtailment gain	$8.10	$5.70	$5.60
Actuarial loss	-1.4	-2.5	-2.5
Total before taxes	6.7	3.2	3.1
Income tax benefit	-2.7	-1.3	-1.2
Total, net of tax	$4	$1.90	$1.90

ShareBased_Compensation_Detail

Share-Based Compensation (Details Textual) (USD $)	12 Months Ended			3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2013	Jul. 13, 2011
Distribution First | Modified Options Sunoco Employees
Share-based compensation (Textual) [Abstract]
Stock option time until expiration (in years)	10 years
Total intrinsic value of stock options exercised	$400,000	$900,000	$2,600,000
Restricted stock units expected to vest (in shares)	138,194
Modified options granted Sonoco employees (in shares)	1,219,842
Stock option range lower (in dollars per share)	$4.77
Stock option range upper (in dollars per share)	$29.35
Weighted average remaining life (in years)	2 years 1 month
Expected to vest at end of period	200,000
Stock option exercised (in shares)	59,462	167,762	463,699
Stock option canceled (in shares)	14,640	361,604	14,481
Distribution Second | Modified Options
Share-based compensation (Textual) [Abstract]
Stock option time until expiration (in years)	10 years
Total intrinsic value of stock options exercised	100,000
Restricted stock units expected to vest (in shares)	282,277
Weighted average remaining contractual term (in years)	3 years 8 months
Stock option range lower (in dollars per share)	$8.93
Stock option range upper (in dollars per share)	$22.31
Expected to vest at end of period	1,600,000
Stock option exercised (in shares)	0		13,577
Modified options granted to SunCoke employees (in shares)	295,854
Anti-dilution provision				500,000
SunCoke LTPEP
Share-based compensation (Textual) [Abstract]
Common stock issuable (in shares)					1,600,000
Common stock issuable pursuant to new awards (in shares)					6,000,000
Stock Options
Share-based compensation (Textual) [Abstract]
Granted stock options (in shares)	407,075	446,948	486,182
Stock option time until expiration (in years)	10 years
Granted	$22.30	$16.55	$14.29
Number of annual installment in which stock option exercisable	3
Period from grant date for annual installment (in years)	1 year
Weighted-average fair value stock option (in dollars per share)	$7.86	$6	$5.70
Forfeiture rate (as a percent)	3.00%	3.00%	0.00%
Total intrinsic value of stock options exercised	900,000	100,000	0
Compensation expense	4,700,000	4,600,000	3,800,000
Compensation expense, net of tax	3,000,000	2,900,000	2,300,000
Unrecognized compensation cost	3,400,000
Unrecognized compensation cost, period for recognition (in years)	1 year 8 months
Weighted average remaining contractual term (in years)	7 years 3 months	8 years
Options outstanding (in shares)	2,403,850	2,287,252
Expected to vest at end of period	1,600,000
Aggregate intrinsic value	4,200,000
Stock option exercised (in shares)	185,433
Number of stock options which are fully vested and exercisable ( in shares)	828,226
Stock Options | Executive Officer
Share-based compensation (Textual) [Abstract]
Forfeiture rate (as a percent)	0.00%
Restricted Stock Units (RSUs)
Share-based compensation (Textual) [Abstract]
Number of annual installment in which stock option exercisable	3
Period from grant date for annual installment (in years)	1 year
Compensation expense	3,900,000	2,500,000	1,500,000
Compensation expense, net of tax	2,500,000	1,600,000	900,000
Unrecognized compensation cost	6,200,000
Unrecognized compensation cost, period for recognition (in years)	1 year 8 months
Non-option award units (in shares)	236,844	293,918	83,082
Weighted average grant-date fair value, non-option award units (in dollars per share)	$22.06	$16.58	$14.29
Total fair value of non-option award units vested	2,900,000	1,300,000	800,000
Non-option award units outstanding (in shares)	479,673	501,801
Performance Share Units
Share-based compensation (Textual) [Abstract]
Compensation expense	1,200,000	500,000
Compensation expense, net of tax	700,000	300,000
Unrecognized compensation cost	$2,300,000
Unrecognized compensation cost, period for recognition (in years)	1 year 8 months
Non-option award units (in shares)		96,073
Weighted average grant-date fair value, non-option award units (in dollars per share)		$19.56
Percentage of award determined by the Company's three year TSR (as a percent)	50.00%
Percentage of award determined by pre-tax return on capital (as a percent)	50.00%
Non-option award units outstanding (in shares)	161,438	96,073
Performance Share Units | Distribution First | Units Awarded During Period [Member]
Share-based compensation (Textual) [Abstract]
Non-option award units (in shares)	84,734
Weighted average grant-date fair value, non-option award units (in dollars per share)	$26.09
Performance Share Units | Minimum
Share-based compensation (Textual) [Abstract]
Percentage adjustment of award determined by pre-tax return on capital (as a percent)	0.00%
Performance Share Units | Maximum
Share-based compensation (Textual) [Abstract]
Percentage adjustment of award determined by pre-tax return on capital (as a percent)	200.00%

ShareBased_Compensation_Detail1

Share-Based Compensation (Details) (Stock Options)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stock Options
Weighted-average assumptions
Risk Free Interest Rate (as a percent)	1.57%	0.93%	0.82%
Expected Term (in years)	5 years	5 years	5 years
Volatility (as a percent)	38.00%	44.00%	45.00%
Dividend yield (as a percent)	0.00%	0.00%	0.00%

ShareBased_Compensation_Detail2

Share-Based Compensation (Details 1) (Stock Options, USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stock Options
Number of Options (in shares)
Outstanding at the beginning of period	2,287,252
Granted	407,075	446,948	486,182
Exercised	-185,433
Forfeited	-105,044
Outstanding at end of period	2,403,850	2,287,252
Exercisable at end of period	1,570,632
Expected to vest at end of period	828,226
Weighted Average Exercise Price (in dollars per share)
Outstanding at beginning of period	$16.52
Granted	$22.30	$16.55	$14.29
Exercised	$16.96
Forfeited	$19.55
Outstanding at end of period	$17.34	$16.52
Exercisable at end of period	$16.66
Expected to vest at end of period	$18.63
Weighted Average Remaining Contractual Term (years)
Outstanding at beginning of period	7 years 3 months	8 years
Outstanding at end of period	7 years 3 months	8 years
Exercisable at end of period	6 years 9 months
Expected to vest at end of period	8 years 3 months
Aggregate Intrinsic Value (millions)
Outstanding at beginning of period	$14.40
Outstanding at end of period	5.9	14.4
Exercisable at end of period	4.2
Expected to vest at end of period	$1.60

ShareBased_Compensation_Detail3

Share-Based Compensation (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at beginning of period	501,801
Granted	236,844	293,918	83,082
Vested	-181,925
Forfeited	-77,047
Outstanding at end of period	479,673	501,801
Weighted Average Grant- Date Fair Value (in dollars per share)
Outstanding at beginning of period	$16.44
Granted	$22.06	$16.58	$14.29
Vested	$16.48
Forfeited	$19.07
Outstanding at end of period	$18.77	$16.44
Performance Share Units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at beginning of period	96,073
Granted		96,073
Vested	0
Forfeited	-19,369
Outstanding at end of period	161,438	96,073
Weighted Average Grant- Date Fair Value (in dollars per share)
Outstanding at beginning of period	$19.56
Granted		$19.56
Vested	$0
Forfeited	$19.21
Outstanding at end of period	$22.63	$19.56

Earnings_per_Share_Details

Earnings per Share (Details)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share [Abstract]
Weighted-average number of common shares outstanding-basic (in shares)	68.8	69.9	70
Add: effect of dilutive share-based compensation awards (in shares)	0	0.3	0.3
Weighted-average number of shares-diluted (in shares)	68.8	70.2	70.3

Earnings_per_Share_Details_Tex

Earnings per Share (Details Textual) (USD $)	0 Months Ended		1 Months Ended	29 Months Ended	12 Months Ended			0 Months Ended
	Jul. 29, 2014	Jul. 23, 2014	Oct. 31, 2014	Jul. 22, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 31, 2015	Jan. 28, 2015	Feb. 16, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of shares authorized for repurchase										3,500,000
Shares repurchased, shares			3,200,000	1,800,000
Common stock, par value		$0.01			0.01	0.01
Share repurchase program, maximum amount		$150,000,000
Aggregate cost of share repurchases	75,000,000
Shares repurchased, in dollar per share			$23.28
Share repurchase program, remaining authorized repurchase amount			75,000,000
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential dilutive effect excluded from the computation of diluted weighted-average shares outstanding (in shares)					2,700,000	200,000	2,500,000
Restricted Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential dilutive effect excluded from the computation of diluted weighted-average shares outstanding (in shares)					500,000		100,000
Performance Share Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential dilutive effect excluded from the computation of diluted weighted-average shares outstanding (in shares)					100,000
Subsequent Event
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Aggregate cost of share repurchases									20,000,000
Share repurchase program, remaining authorized repurchase amount								$55,000,000

Equity_Distribution_Agreement_

Equity Distribution Agreement (Details) (USD $)	0 Months Ended	12 Months Ended
	9-May-14	Dec. 31, 2014	Dec. 31, 2013	Aug. 05, 2014
Limited Partners' Capital Account [Line Items]
Ownership percentage held by public unitholders	43.90%	44.00%
Interest in partnership (as a percent)		56.00%	55.90%
SunCoke Energy Partners, L.P. | Common Units
Limited Partners' Capital Account [Line Items]
Partnership common units authorized for sale				$75,000,000
Shares sold under the equity agreement (in shares)		62,956
Proceeds from Issuance of Private Placement		1,800,000
Remaining partnership common units authorized for sale		73,200,000

Supplemental_Cash_Flow_Informa2

Supplemental Cash Flow Information (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Supplemental Cash Flow Information
Interest paid	$45.80	$43.20	$44
Income taxes paid	$9.10	$15.30	$6.30

Fair_Value_Measurements_Detail

Fair Value Measurements (Details)

3 Months Ended

12 Months Ended

12 Months Ended

3 Months Ended

9 Months Ended

12 Months Ended

3 Months Ended

9 Months Ended

12 Months Ended

Jun. 30, 2014

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Aug. 15, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2014

Feb. 21, 2013

Nov. 26, 2012

Dec. 31, 2013

Apr. 01, 2013

Mar. 31, 2013

Oct. 11, 2011

Aug. 15, 2011

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2014

Sep. 30, 2014

Jun. 30, 2014

Sep. 30, 2014

Jun. 30, 2014

Sep. 30, 2014

Dec. 31, 2014

Jun. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2014

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

Foreign Exchange Contract

Foreign Exchange Contract

Foreign Exchange Contract

Foreign Exchange Contract

Foreign Exchange Contract

Interest Rate Swap

Interest Rate Swap

Interest Rate Swap

Interest Rate Swap

Interest Rate Swap

Level 1

Level 1

Discontinued Operations

Discontinued Operations

Discontinued Operations

Coal Mining Business

Coal Mining Business

Coal Mining Business

Coal Mining Business

Coal Mining Business

Minimum

Maximum

VISA SunCoke Limited

VISA SunCoke Limited

VISA SunCoke Limited

USD ($)

USD ($)

USD ($)

INR

INR

USD ($)

USD ($)

USD ($)

USD ($)

Cash Equivalents

Cash Equivalents

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

Discontinued Operations

Coal Mining Business

Coal Mining Business

USD ($)

Minimum

Maximum

USD ($)

USD ($)

USD ($)

T

T

Fair Value Measurements (Textual) [Abstract]

Cash equivalents measured at fair value

$88,200,000

$125,100,000

Notional amount of hedging derivatives

125,000,000

0

0

1,830,000,000

1,845,000,000

100,000,000

-25,000,000

125,000,000

Weighted average exchange rate

54.81

56.075

Increase (decrease) in interest cost due to mark to market impact

-400,000

200,000

600,000

Asset impairment

16,800,000

0

0

17,800,000

10,100,000

54,000,000

150,300,000

30,500,000

Foreign exchange contract gain

-300,000

-1,500,000

900,000

Weighted average rate for receiving floating rate payment (as a percent)

1.32%

Minimum floating rate payments (as a percent)

1.00%

Fair value of swap agreement

300,000

Fair value of long-term debt

662,900,000

687,100,000

Carrying amount of long-term debt

651,500,000

689,100,000

Asset impairment

16,800,000

0

0

27,900,000

97,100,000

133,500,000

82,000,000

Impairment of Long-Lived Assets Held-for-use

15,100,000

16,800,000

Coal sales price per ton

97

149

Sales volume in tons

1,600,000

1,800,000

Discount rate

14.00%

Goodwill impairment

6,000,000

Impairment charge

45,500,000

Valuation allowance on assets held for sale

45,500,000

Discount rate on discounted cash flow analysis

13.50%

Gross margin per ton on coke imports

5

4

24

Change in investment valuation from $5 change in gross margin per ton

$8,000,000

Business_Segment_Information_D

Business Segment Information (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Business Segment Information
Sales and other operating revenue	$378.30	$367.50	$364.20	$351.50	$377.40	$373.10	$383.70	$438	$1,461.50	$1,572.20	$1,853.70
Adjusted EBITDA from Continuing Operations									237.8	221.8	227.7
Adjusted EBITDA, Continuing Operations, Legacy Expense Net									-17.1	-0.4	-3.9
Adjusted EBITDA from Discontinued Operations									-10	-6.3	41.8
Adjusted EBITDA									210.7	215.1	265.6
Depreciation and amortization expense									96.1	77.1	65
Capital expenditures									118.3	132.3	54.2
Asset, tax	32.4				19.2				32.4	19.2
Assets	1,998.10				2,243.90				1,998.10	2,243.90
Domestic Coke
Business Segment Information
Sales and other operating revenue									1,388.30	1,528.70	1,816.80
Adjusted EBITDA from Continuing Operations									247.9	243.2	249.3
Depreciation and amortization expense									81.3	68.1	60.7
Capital expenditures									109.2	121.2	42.3
Brazil Coke
Business Segment Information
Sales and other operating revenue									37	35.4	36.9
Adjusted EBITDA from Continuing Operations									18.9	16.1	11.9
Depreciation and amortization expense									0.5	0.4	0.3
Capital expenditures									0.9	0.8	1.5
India Coke
Business Segment Information
Adjusted EBITDA from Continuing Operations									-3.1	0.9	0
Coal Logistics
Business Segment Information
Sales and other operating revenue									36.2	8.1	0
Adjusted EBITDA from Continuing Operations									14.3	4.7	0
Depreciation and amortization expense									7.6	1.8	0
Capital expenditures									2.9	0.2	0
Coal Logistics Intersegment Sales
Business Segment Information
Sales and other operating revenue									18.8	5.5	0
Corporate and Other
Business Segment Information
Sales and other operating revenue									18.6	17.5	17.9
Adjusted EBITDA from Continuing Operations									-40.2	-43.1	-33.5
Depreciation and amortization expense									6.7	6.8	4
Capital expenditures									5.3	10.1	10.4
Intersegment Eliminations
Business Segment Information
Sales and other operating revenue									-37.4	-23	-17.9
Continuing Operations
Business Segment Information
Asset, tax	1,946.40				2,065.70				1,946.40	2,065.70
Continuing Operations | Domestic Coke
Business Segment Information
Asset, tax	1,585.80				1,533.70				1,585.80	1,533.70
Continuing Operations | Brazil Coke
Business Segment Information
Asset, tax	61.6				61.4				61.6	61.4
Continuing Operations | India Coke
Business Segment Information
Asset, tax	22.5				57				22.5	57
Continuing Operations | Coal Logistics
Business Segment Information
Asset, tax	114.4				119				114.4	119
Continuing Operations | Corporate and Other
Business Segment Information
Asset, tax	162.1				294.6				162.1	294.6
Discontinued Operations
Business Segment Information
Asset, tax	$19.30				$159				$19.30	$159

Business_Segment_Information_D1

Business Segment Information (Details 1) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Summary of total sales and other operating revenue by product or service
Coke sales									$1,322.80	$1,463	$1,750.50
Steam and electricity sales									65.7	65.6	62.5
Operating and licensing fees									36.9	35.4	36.9
Coal logistics									33.9	7.2	0
Other									2.2	1	3.8
Total sales and other operating revenue	$378.30	$367.50	$364.20	$351.50	$377.40	$373.10	$383.70	$438	$1,461.50	$1,572.20	$1,853.70

Business_Segment_Information_D2

Business Segment Information (Details 2) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of Adjusted EBITDA to net income
Adjusted EBITDA attributable to SunCoke Energy, Inc.									$150	$173.90	$265.60
Add: Adjusted EBITDA attributable to noncontrolling interest									60.7	41.2	0
Adjusted EBITDA									210.7	215.1	265.6
Adjusted EBITDA from Discontinued Operations									-10	-6.3	41.8
Legacy costs, net(3)									-17.1	-0.4	-3.9
Adjusted EBITDA from Continuing Operations									237.8	221.8	227.7
Subtract:
Adjustment to unconsolidated affiliate earnings									3	3.2	0
Depreciation, depletion and amortization									96.1	77.1	65
India impairment									30.5	0	0
Asset impairment									16.8	0	0
Financing expense, net									63.2	52.3	47.6
Income tax expense									7.4	16.4	18
Sales discount provided to customers due to sharing of nonconventional fuel tax credits									-0.5	6.8	11.2
Income from continuing operations	-15.7	24.9	-7.2	2.2	23.1	15.9	15.5	11.1	4.2	65.6	82
(Loss) income from discontinued operations, net of tax	-40.1	-18.5	-41.2	-6.2	-4.4	-3.6	-2.8	-4.7	-106	-15.5	20.5
Net (loss) income	-55.8	6.4	-48.4	-4	18.7	12.3	12.7	6.4	-101.8	50.1	102.5
Accrued sales discounts	0				13.6				0	13.6
Settlement of accrued sales discount				13.1
Gain on settlement of sales discounts				0.5
Adjusted EBITDA from Discontinued Operations									-10	-6.3	41.8
Depreciation and depletion from discontinued operations									10.2	18.9	16
Income tax (benefit) expense from discontinued operations									-66.2	-9.7	5.3
Asset and goodwill impairment from discontinued operations									133.5	0	0
(Loss) income from discontinued operations, net of tax	-40.1	-18.5	-41.2	-6.2	-4.4	-3.6	-2.8	-4.7	-106	-15.5	20.5
Other Segments
Subtract:
Legacy costs, net(3)									17.1	0.4	3.9
Discontinued Operations
Subtract:
Asset impairment	17.8	10.1	54
Exit costs									$18.50	$0	$0

Business_Segment_Information_B

Business Segment Information Business Segment Information (Details 3) (Other Segments, USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other Segments
Segment Reporting Information [Line Items]
Black lung liability expense	$14.30	($0.30)	$3.30
Postretirement benefit plan benefit	-3.7	-1	-0.6
Defined benefit plan expense (benefit)	0.2	-0.1	0.6
Workers compensation expense	4.6	2	1.2
Other	1.7	-0.2	-0.6
Total legacy costs	$17.10	$0.40	$3.90

Business_Segment_Information_D3

Business Segment Information (Details Textual)	0 Months Ended	12 Months Ended
	Mar. 18, 2013	Dec. 31, 2014
	T	T
Business Segment Information (Textual) [Abstract]
Number of facilities		5
Ownership percentage (as a percent)		100.00%
VISA SunCoke Limited
Business Segment Information (Textual) [Abstract]
Ownership percentage (as a percent)	49.00%	49.00%
Cokemaking facility capacity (in tons)	440,000	440,000

Selected_Quarterly_Data_unaudi2

Selected Quarterly Data (unaudited) (Details) (USD $)	0 Months Ended	3 Months Ended								12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Oct. 23, 2014	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Selected Quarterly Financial Information
Sales and other operating revenue		$378.30	$367.50	$364.20	$351.50	$377.40	$373.10	$383.70	$438	$1,461.50	$1,572.20	$1,853.70
Gross profit		38.1	64.3	55.2	33.7	56.5	54.6	51.7	49.8
(Loss) income from continuing operations		-15.7	24.9	-7.2	2.2	23.1	15.9	15.5	11.1	4.2	65.6	82
(Loss) income from discontinued operations, net of tax		-40.1	-18.5	-41.2	-6.2	-4.4	-3.6	-2.8	-4.7	-106	-15.5	20.5
Net (loss) income		-55.8	6.4	-48.4	-4	18.7	12.3	12.7	6.4	-101.8	50.1	102.5
Less: Net income attributable to noncontrolling interests		9.6	10	0.7	4	7.7	6.1	7	4.3	24.3	25.1	3.7
Net income attributable to SunCoke Energy, Inc.		($65.40)	($3.60)	($49.10)	($8)	$11.10	$6.20	$5.70	$2.10	($126.10)	$25	$98.80
Basic
Continuing operations (in dollar per share)		($0.38)	($0.21)	($0.12)	($0.02)	$0.22	$0.14	$0.12	($0.10)	($0.29)	$0.58	$1.12
Discontinued operations (in dollar per share)		($0.60)	($0.27)	($0.59)	($0.09)	($0.06)	($0.05)	($0.04)	($0.07)
Diluted
Continuing operations (in dollar per share)		($0.38)	($0.21)	($0.12)	($0.02)	$0.22	$0.14	$0.12	($0.10)	($0.29)	$0.58	$1.11
Discontinued operations (in dollar per share)		($0.60)	($0.26)	($0.59)	($0.09)	($0.06)	($0.05)	($0.04)	($0.07)
Cash dividend declared per share	$0.06	$0.06	$0	$0	$0	$0	$0	$0	$0

Selected_Quarterly_Data_unaudi3

Selected Quarterly Data (unaudited) (Details Textual) (USD $)	0 Months Ended	3 Months Ended								12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Oct. 23, 2014	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Asset impairment										$16.80	$0	$0
Income Tax Expense (Benefit)										-7.4	-16.4	-18
Cash dividend declared per share	$0.06	$0.06	$0	$0	$0	$0	$0	$0	$0
Coal Mining
Asset impairment		1.7		15.1
Income Tax Expense (Benefit)		0.7		5.8
Discontinued Operations
Asset impairment		$17.80	$10.10	$54

Supplemental_Condensed_Consoli2

Supplemental Condensed Consolidating Financial Information (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues
Sales and other operating revenue	$378.30	$367.50	$364.20	$351.50	$377.40	$373.10	$383.70	$438	$1,461.50	$1,572.20	$1,853.70
Equity in (loss) earnings of subsidiaries									0	0	0
Other (loss) income, net									11.2	13.3	11
Total revenues									1,472.70	1,585.50	1,864.70
Costs and operating expenses
Cost of products sold and operating expenses									1,174.10	1,282.50	1,573.10
Selling, general and administrative expenses									75.9	89.4	79
Depreciation, depletion and amortization									96.1	77.1	65
Asset impairment									16.8	0	0
Total costs and operating expenses									1,362.90	1,449	1,717.10
Operating (loss) income									109.8	136.5	147.6
Interest (income) expense, net - affiliate									0	0	0
Interest expense (income), net									63.2	52.3	47.6
Total interest expense (income), net									63.2	52.3	47.6
(Loss) income before income tax expense and loss from equity method investment									46.6	84.2	100
Income tax expense									7.4	16.4	18
Loss from equity method investment									35	2.2	0
(Loss) income from continuing operations	-15.7	24.9	-7.2	2.2	23.1	15.9	15.5	11.1	4.2	65.6	82
(Loss) income from discontinued operations, net of tax	-40.1	-18.5	-41.2	-6.2	-4.4	-3.6	-2.8	-4.7	-106	-15.5	20.5
Net (loss) income	-55.8	6.4	-48.4	-4	18.7	12.3	12.7	6.4	-101.8	50.1	102.5
Less: Net income attributable to noncontrolling interests	9.6	10	0.7	4	7.7	6.1	7	4.3	24.3	25.1	3.7
Net income attributable to SunCoke Energy, Inc./net parent investment	-65.4	-3.6	-49.1	-8	11.1	6.2	5.7	2.1	-126.1	25	98.8
Comprehensive (loss) income									-109.2	43.9	101.1
Less: Comprehensive income attributable to noncontrolling interests									24.3	25.1	3.7
Comprehensive (loss) income attributable to SunCoke Energy, Inc.									-133.5	18.8	97.4
Issuer
Revenues
Sales and other operating revenue									0	0	0
Equity in (loss) earnings of subsidiaries									-101.3	56.2	138.9
Other (loss) income, net									-0.3	0	0
Total revenues									-101.6	56.2	138.9
Costs and operating expenses
Cost of products sold and operating expenses									0	0	0
Selling, general and administrative expenses									13.4	12.1	10.6
Depreciation, depletion and amortization									0	0	0
Asset impairment									0
Total costs and operating expenses									13.4	12.1	10.6
Operating (loss) income									-115	44.1	128.3
Interest (income) expense, net - affiliate									0	0	0
Interest expense (income), net									26.3	37.9	48
Total interest expense (income), net									26.3	37.9	48
(Loss) income before income tax expense and loss from equity method investment									-141.3	6.2	80.3
Income tax expense									-15.2	-18.8	-18.5
Loss from equity method investment									0	0
(Loss) income from continuing operations									-126.1	25	98.8
(Loss) income from discontinued operations, net of tax									0	0	0
Net (loss) income									-126.1	25	98.8
Less: Net income attributable to noncontrolling interests									0	0	0
Net income attributable to SunCoke Energy, Inc./net parent investment									-126.1	25	98.8
Comprehensive (loss) income									-133.5	18.8	97.4
Less: Comprehensive income attributable to noncontrolling interests									0	0	0
Comprehensive (loss) income attributable to SunCoke Energy, Inc.									-133.5	18.8	97.4
Guarantor Subsidiaries
Revenues
Sales and other operating revenue									435.8	480.6	564.4
Equity in (loss) earnings of subsidiaries									56	88.6	95.5
Other (loss) income, net									1.6	3.7	1.5
Total revenues									493.4	572.9	661.4
Costs and operating expenses
Cost of products sold and operating expenses									354	389.4	462.6
Selling, general and administrative expenses									34.5	49.6	42.4
Depreciation, depletion and amortization									25.5	25.2	22.3
Asset impairment									16.8
Total costs and operating expenses									430.8	464.2	527.3
Operating (loss) income									62.6	108.7	134.1
Interest (income) expense, net - affiliate									-7.3	-7.3	-7.4
Interest expense (income), net									-1.8	-0.8	0
Total interest expense (income), net									-9.1	-8.1	-7.4
(Loss) income before income tax expense and loss from equity method investment									71.7	116.8	141.5
Income tax expense									24.5	36.8	13.5
Loss from equity method investment									0	0
(Loss) income from continuing operations									47.2	80	128
(Loss) income from discontinued operations, net of tax									-106	-15.5	20.5
Net (loss) income									-58.8	64.5	148.5
Less: Net income attributable to noncontrolling interests									0	0	0
Net income attributable to SunCoke Energy, Inc./net parent investment									-58.8	64.5	148.5
Comprehensive (loss) income									-65.4	68.5	148.2
Less: Comprehensive income attributable to noncontrolling interests									0	0	0
Comprehensive (loss) income attributable to SunCoke Energy, Inc.									-65.4	68.5	148.2
Non- Guarantor Subsidiaries
Revenues
Sales and other operating revenue									1,025.70	1,091.60	1,289.30
Equity in (loss) earnings of subsidiaries									0	0	0
Other (loss) income, net									9.9	9.6	9.5
Total revenues									1,035.60	1,101.20	1,298.80
Costs and operating expenses
Cost of products sold and operating expenses									820.1	893.1	1,110.50
Selling, general and administrative expenses									28	27.7	26
Depreciation, depletion and amortization									70.6	51.9	42.7
Asset impairment									0
Total costs and operating expenses									918.7	972.7	1,179.20
Operating (loss) income									116.9	128.5	119.6
Interest (income) expense, net - affiliate									7.3	7.3	7.4
Interest expense (income), net									38.7	15.2	-0.4
Total interest expense (income), net									46	22.5	7
(Loss) income before income tax expense and loss from equity method investment									70.9	106	112.6
Income tax expense									-1.9	-1.6	23
Loss from equity method investment									35	2.2
(Loss) income from continuing operations									37.8	105.4	89.6
(Loss) income from discontinued operations, net of tax									0	0	0
Net (loss) income									37.8	105.4	89.6
Less: Net income attributable to noncontrolling interests									24.3	25.1	3.7
Net income attributable to SunCoke Energy, Inc./net parent investment									13.5	80.3	85.9
Comprehensive (loss) income									37	95.2	88.5
Less: Comprehensive income attributable to noncontrolling interests									24.3	25.1	3.7
Comprehensive (loss) income attributable to SunCoke Energy, Inc.									12.7	70.1	84.8
Combining and Consolidating Adjustments
Revenues
Sales and other operating revenue									0	0	0
Equity in (loss) earnings of subsidiaries									45.3	-144.8	-234.4
Other (loss) income, net									0	0	0
Total revenues									45.3	-144.8	-234.4
Costs and operating expenses
Cost of products sold and operating expenses									0	0	0
Selling, general and administrative expenses									0	0	0
Depreciation, depletion and amortization									0	0	0
Asset impairment									0
Total costs and operating expenses										0	0
Operating (loss) income									45.3	-144.8	-234.4
Interest (income) expense, net - affiliate									0	0	0
Interest expense (income), net									0	0	0
Total interest expense (income), net									0	0	0
(Loss) income before income tax expense and loss from equity method investment									45.3	-144.8	-234.4
Income tax expense									0	0	0
Loss from equity method investment									0	0
(Loss) income from continuing operations									45.3	-144.8	-234.4
(Loss) income from discontinued operations, net of tax									0	0	0
Net (loss) income									45.3	-144.8	-234.4
Less: Net income attributable to noncontrolling interests									0	0	0
Net income attributable to SunCoke Energy, Inc./net parent investment									45.3	-144.8	-234.4
Comprehensive (loss) income									52.7	-138.6	-233
Less: Comprehensive income attributable to noncontrolling interests									0	0	0
Comprehensive (loss) income attributable to SunCoke Energy, Inc.									$52.70	($138.60)	($233)

Supplemental_Condensed_Consoli3

Supplemental Condensed Consolidating Financial Information (Details 1) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Millions, unless otherwise specified
Assets
Cash and cash equivalents	$139	$233.60	$239.20	$127.50
Receivables	75.4	85.3
Inventories	139.1	128.6
Income tax receivable	6	6.6
Deferred income taxes	26.4	12.6
Other current assets	3.6	2.3
Current assets held for sale	19.3	12.9
Advances to affiliates	0	0
Interest receivable from affiliate		0
Total current assets	408.8	481.9
Notes receivable from affiliate	0	0
Investment in Brazilian cokemaking operations	41	41
Equity method investment in VISA SunCoke Limited	22.3	56.8
Properties, plants and equipment, net	1,466.60	1,458.90
Goodwill and other intangible assets, net	22	23.5
Deferred charges and other assets	37.4	35.7
Long-term assets held for sale	0	146.1
Investment in subsidiaries	0	0
Total assets	1,998.10	2,243.90
Liabilities and Equity
Advances from affiliate	0	0
Accounts payable	110.9	138.4
Accrued liabilities	41.6	59.5
Short-term debt, including current portion of long-term debt	0	41
Interest payable	19.9	18.2
Income taxes payable	0	0
Interest payable to affiliate		0
Current liabilities held for sale	37.4	25.9
Total current liabilities	209.8	283
Long-term debt	651.5	648.1
Payable to affiliate	0	0
Accrual for black lung benefits	43.9	32.4
Retirement benefit liabilities	33.6	34.8
Deferred income taxes	321.9	354.7
Asset retirement obligations	15.1	10.9
Other deferred credits and liabilities	16.9	14.4
Long-term liabilities held for sale	0	33.3
Total liabilities	1,292.70	1,411.60
Equity
Preferred stock, $0.01 par value. Authorized 50,000,000 shares; no issued and outstanding shares at December 31, 2014 and December 31, 2013, respectively	0	0
Common stock, $0.01 par value. Authorized 300,000,000 shares; issued and outstanding 71,251,529 and 70,892,140 shares at December 31, 2014 and December 31, 2013, respectively	0.7	0.7
Treasury stock, 4,977,115 shares and 1,255,355 shares at December 31, 2014 and 2013 respectively	-105	-19.9
Additional paid-in capital	543.6	446.9
Accumulated other comprehensive loss	-21.5	-14.1	-7.9
Retained earnings	13.9	143.8
Total SunCoke Energy, Inc. stockholdersb equity	431.7	557.4
Noncontrolling interests	273.7	274.9
Total equity	705.4	832.3	574.9	559.9
Total liabilities and equity	1,998.10	2,243.90
Issuer
Assets
Cash and cash equivalents	0	0	0	0
Receivables	0.1	0
Inventories	0	0
Income tax receivable	28	39.9
Deferred income taxes	2.6	9.4
Other current assets	0	0
Current assets held for sale	0	0
Advances to affiliates	0	48.2
Interest receivable from affiliate		0
Total current assets	30.7	97.5
Notes receivable from affiliate	0	0
Investment in Brazilian cokemaking operations	0	0
Equity method investment in VISA SunCoke Limited	0	0
Properties, plants and equipment, net	0	0
Goodwill and other intangible assets, net	0	0
Deferred charges and other assets	5.8	11.7
Long-term assets held for sale		0
Investment in subsidiaries	718.2	963.3
Total assets	754.7	1,072.50
Liabilities and Equity
Advances from affiliate	73.4	0
Accounts payable	0	0
Accrued liabilities	0.1	0.5
Short-term debt, including current portion of long-term debt		1
Interest payable	7.6	13.6
Income taxes payable	0	0
Interest payable to affiliate		0
Current liabilities held for sale	0	0
Total current liabilities	81.1	15.1
Long-term debt	240	498.4
Payable to affiliate	0	0
Accrual for black lung benefits	0	0
Retirement benefit liabilities	0	0
Deferred income taxes	0	0
Asset retirement obligations	0	0
Other deferred credits and liabilities	1.9	1.6
Long-term liabilities held for sale		0
Total liabilities	323	515.1
Equity
Preferred stock, $0.01 par value. Authorized 50,000,000 shares; no issued and outstanding shares at December 31, 2014 and December 31, 2013, respectively	0	0
Common stock, $0.01 par value. Authorized 300,000,000 shares; issued and outstanding 71,251,529 and 70,892,140 shares at December 31, 2014 and December 31, 2013, respectively	0.7	0.7
Treasury stock, 4,977,115 shares and 1,255,355 shares at December 31, 2014 and 2013 respectively	-105	-19.9
Additional paid-in capital	543.6	446.9
Accumulated other comprehensive loss	-21.5	-14.1
Retained earnings	13.9	143.8
Total SunCoke Energy, Inc. stockholdersb equity	431.7	557.4
Noncontrolling interests	0	0
Total equity	431.7	557.4
Total liabilities and equity	754.7	1,072.50
Guarantor Subsidiaries
Assets
Cash and cash equivalents	102.4	184.7	206.9	109.4
Receivables	23.1	47.2
Inventories	39.2	37.4
Income tax receivable	0	0
Deferred income taxes	25.6	11.8
Other current assets	2.7	1.3
Current assets held for sale	19.3	12.9
Advances to affiliates	150.5	33.6
Interest receivable from affiliate		7.3
Total current assets	362.8	336.2
Notes receivable from affiliate	89	89
Investment in Brazilian cokemaking operations	0	0
Equity method investment in VISA SunCoke Limited	0	0
Properties, plants and equipment, net	387.8	415.7
Goodwill and other intangible assets, net	6.9	7.5
Deferred charges and other assets	13	14.3
Long-term assets held for sale		146.1
Investment in subsidiaries	494.1	723.8
Total assets	1,353.60	1,732.60
Liabilities and Equity
Advances from affiliate	0	48.2
Accounts payable	29.3	32.9
Accrued liabilities	23.4	42.6
Short-term debt, including current portion of long-term debt		0
Interest payable	0	0
Income taxes payable	28.8	46.7
Interest payable to affiliate		0
Current liabilities held for sale	37.4	25.9
Total current liabilities	118.9	196.3
Long-term debt	0	0
Payable to affiliate	300	300
Accrual for black lung benefits	43.9	32.4
Retirement benefit liabilities	33.6	34.8
Deferred income taxes	320.8	362
Asset retirement obligations	12.5	8.5
Other deferred credits and liabilities	13.8	12.2
Long-term liabilities held for sale		33.3
Total liabilities	843.5	979.5
Equity
Preferred stock, $0.01 par value. Authorized 50,000,000 shares; no issued and outstanding shares at December 31, 2014 and December 31, 2013, respectively	0	0
Common stock, $0.01 par value. Authorized 300,000,000 shares; issued and outstanding 71,251,529 and 70,892,140 shares at December 31, 2014 and December 31, 2013, respectively	0	0
Treasury stock, 4,977,115 shares and 1,255,355 shares at December 31, 2014 and 2013 respectively	0	0
Additional paid-in capital	176.6	354.2
Accumulated other comprehensive loss	-9.3	-2.7
Retained earnings	342.8	401.6
Total SunCoke Energy, Inc. stockholdersb equity	510.1	753.1
Noncontrolling interests	0	0
Total equity	510.1	753.1
Total liabilities and equity	1,353.60	1,732.60
Non- Guarantor Subsidiaries
Assets
Cash and cash equivalents	36.6	48.9	32.3	18.1
Receivables	52.2	38.1
Inventories	99.9	91.2
Income tax receivable	6.8	13.4
Deferred income taxes	0.8	0.8
Other current assets	0.9	1
Current assets held for sale	0	0
Advances to affiliates	0	0
Interest receivable from affiliate		0
Total current assets	197.2	193.4
Notes receivable from affiliate	300	300
Investment in Brazilian cokemaking operations	41	41
Equity method investment in VISA SunCoke Limited	22.3	56.8
Properties, plants and equipment, net	1,078.80	1,043.20
Goodwill and other intangible assets, net	15.1	16
Deferred charges and other assets	18.6	9.7
Long-term assets held for sale		0
Investment in subsidiaries	0	0
Total assets	1,673	1,660.10
Liabilities and Equity
Advances from affiliate	77.1	33.6
Accounts payable	81.6	105.5
Accrued liabilities	18.1	16.4
Short-term debt, including current portion of long-term debt		40
Interest payable	12.3	4.6
Income taxes payable	0	0
Interest payable to affiliate		7.3
Current liabilities held for sale	0	0
Total current liabilities	189.1	207.4
Long-term debt	411.5	149.7
Payable to affiliate	89	89
Accrual for black lung benefits	0	0
Retirement benefit liabilities	0	0
Deferred income taxes	3.7	2.1
Asset retirement obligations	2.6	2.4
Other deferred credits and liabilities	1.2	0.6
Long-term liabilities held for sale		0
Total liabilities	697.1	451.2
Equity
Preferred stock, $0.01 par value. Authorized 50,000,000 shares; no issued and outstanding shares at December 31, 2014 and December 31, 2013, respectively	0	0
Common stock, $0.01 par value. Authorized 300,000,000 shares; issued and outstanding 71,251,529 and 70,892,140 shares at December 31, 2014 and December 31, 2013, respectively	0	0
Treasury stock, 4,977,115 shares and 1,255,355 shares at December 31, 2014 and 2013 respectively	0	0
Additional paid-in capital	501.1	745.6
Accumulated other comprehensive loss	-12.2	-11.4
Retained earnings	213.3	199.8
Total SunCoke Energy, Inc. stockholdersb equity	702.2	934
Noncontrolling interests	273.7	274.9
Total equity	975.9	1,208.90
Total liabilities and equity	1,673	1,660.10
Combining and Consolidating Adjustments
Assets
Cash and cash equivalents	0	0	0	0
Receivables	0	0
Inventories	0	0
Income tax receivable	-28.8	-46.7
Deferred income taxes	-2.6	-9.4
Other current assets	0	0
Current assets held for sale	0	0
Advances to affiliates	-150.5	-81.8
Interest receivable from affiliate		-7.3
Total current assets	-181.9	-145.2
Notes receivable from affiliate	-389	-389
Investment in Brazilian cokemaking operations	0	0
Equity method investment in VISA SunCoke Limited	0	0
Properties, plants and equipment, net	0	0
Goodwill and other intangible assets, net	0	0
Deferred charges and other assets	0	0
Long-term assets held for sale		0
Investment in subsidiaries	-1,212.30	-1,687.10
Total assets	-1,783.20	-2,221.30
Liabilities and Equity
Advances from affiliate	-150.5	-81.8
Accounts payable	0	0
Accrued liabilities	0	0
Short-term debt, including current portion of long-term debt		0
Interest payable	0	0
Income taxes payable	-28.8	-46.7
Interest payable to affiliate		-7.3
Current liabilities held for sale	0	0
Total current liabilities	-179.3	-135.8
Long-term debt	0	0
Payable to affiliate	-389	-389
Accrual for black lung benefits	0	0
Retirement benefit liabilities	0	0
Deferred income taxes	-2.6	-9.4
Asset retirement obligations	0	0
Other deferred credits and liabilities	0	0
Long-term liabilities held for sale		0
Total liabilities	-570.9	-534.2
Equity
Preferred stock, $0.01 par value. Authorized 50,000,000 shares; no issued and outstanding shares at December 31, 2014 and December 31, 2013, respectively	0	0
Common stock, $0.01 par value. Authorized 300,000,000 shares; issued and outstanding 71,251,529 and 70,892,140 shares at December 31, 2014 and December 31, 2013, respectively	0	0
Treasury stock, 4,977,115 shares and 1,255,355 shares at December 31, 2014 and 2013 respectively		0
Additional paid-in capital	-677.7	-1,099.80
Accumulated other comprehensive loss	21.5	14.1
Retained earnings	-556.1	-601.4
Total SunCoke Energy, Inc. stockholdersb equity	-1,212.30	-1,687.10
Noncontrolling interests	0	0
Total equity	-1,212.30	-1,687.10
Total liabilities and equity	($1,783.20)	($2,221.30)

Supplemental_Condensed_Consoli4

Supplemental Condensed Consolidating Financial Information (Details 2) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash Flows from Continuing Operating Activities:
Net (loss) income	($55,800,000)	$6,400,000	($48,400,000)	($4,000,000)	$18,700,000	$12,300,000	$12,700,000	$6,400,000	($101,800,000)	$50,100,000	$102,500,000
Adjustments to reconcile net income to net cash provided by continuing operating activities:
(Loss) income from discontinued operations, net of tax	40,100,000	18,500,000	41,200,000	6,200,000	4,400,000	3,600,000	2,800,000	4,700,000	106,000,000	15,500,000	-20,500,000
Asset impairment									16,800,000	0	0
Depreciation and amortization expense									96,100,000	77,100,000	65,000,000
Deferred income tax expense (benefit)									-6,000,000	500,000	30,400,000
Payments in Excess of Expense for Retirement Plans									-8,100,000	-5,400,000	-9,600,000
Share-based compensation expense									9,800,000	7,600,000	6,700,000
Equity in Earnings of Subsidiaries									0	0	0
Excess tax benefit from share-based awards									-300,000	0	0
Loss from equity method investment									35,000,000	2,200,000	0
Loss on extinguishment/modification of debt									15,400,000	0	0
Changes in working capital pertaining to continuing operating activities (net of acquisitions):
Receivables									9,900,000	-17,100,000	-5,700,000
Inventories									-10,500,000	30,900,000	57,800,000
Accounts payable									-27,500,000	25,200,000	-69,200,000
Accrued liabilities									-17,900,000	-22,800,000	11,000,000
Interest payable									1,700,000	2,500,000	-200,000
Income taxes									1,000,000	-10,100,000	-17,600,000
Accrual for black lung benefits									11,500,000	-2,400,000	1,300,000
Other									-1,100,000	2,900,000	-7,900,000
Net cash provided by continuing operating activities									130,000,000	156,700,000	144,000,000
Cash Flows from Continuing Investing Activities:
Capital expenditures									-118,300,000	-132,300,000	-54,200,000
Acquisition of businesses, net of cash acquired									0	-113,300,000	0
Equity method investment in VISA SunCoke Limited									0	-67,700,000	0
Net cash used in continuing investing activities									-118,300,000	-313,300,000	-54,200,000
Cash Flows from Continuing Financing Activities:
Proceeds from issuance of common units of SunCoke Energy Partners, L.P., net of offering costs									90,500,000	237,800,000	0
Proceeds from issuance of long-term debt									268,100,000	150,000,000
Repayment of long-term debt									-276,500,000	-225,000,000	-3,300,000
Debt issuance costs									-5,800,000	-6,900,000	0
Proceeds from revolving facility									40,000,000	40,000,000	0
Repayment of revolving facility									-80,000,000	0	0
Cash distributions to noncontrolling interests									-32,300,000	-17,800,000	-2,300,000
Shares repurchased									-85,100,000	-10,900,000	-9,400,000
Proceeds from exercise of stock options									2,900,000	2,500,000	4,700,000
Excess tax benefit from share-based awards									300,000	0	0
Dividends paid									-3,800,000	0	0
Net increase (decrease) in advances from affiliate									0	0	0
Net cash (used in) provided by continuing financing activities									-81,700,000	169,700,000	-10,300,000
Net (decrease) increase in cash and cash equivalents from continuing operations									-70,000,000	13,100,000	79,500,000
Cash flows from discontinued operations - operating activities									-17,700,000	-5,400,000	62,100,000
Cash flows from discontinued operations - investing activities									-6,900,000	-13,300,000	-29,900,000
Net Cash Provided by (Used in) Discontinued Operations									-24,600,000	-18,700,000	32,200,000
Net (decrease) increase in cash and cash equivalents									-94,600,000	-5,600,000	111,700,000
Cash and cash equivalents at beginning of year				233,600,000				239,200,000	233,600,000	239,200,000	127,500,000
Cash and cash equivalents at end of year	139,000,000				233,600,000				139,000,000	233,600,000	239,200,000
Issuer
Cash Flows from Continuing Operating Activities:
Net (loss) income									-126,100,000	25,000,000	98,800,000
Adjustments to reconcile net income to net cash provided by continuing operating activities:
(Loss) income from discontinued operations, net of tax									0	0	0
Asset impairment									0
Depreciation and amortization expense									0	0	0
Deferred income tax expense (benefit)									6,800,000	0	-1,000,000
Payments in Excess of Expense for Retirement Plans									0	0	0
Share-based compensation expense									9,800,000	7,600,000	6,700,000
Equity in Earnings of Subsidiaries									101,300,000	-56,200,000	-138,900,000
Excess tax benefit from share-based awards									-400,000
Loss from equity method investment									0	0
Loss on extinguishment/modification of debt									0
Changes in working capital pertaining to continuing operating activities (net of acquisitions):
Receivables									-100,000	0	0
Inventories									0	0	0
Accounts payable									0	-600,000	500,000
Accrued liabilities									-500,000	0	0
Interest payable									-6,000,000	-2,100,000	-200,000
Income taxes									12,300,000	-23,500,000	-17,200,000
Accrual for black lung benefits									0	0	0
Other									6,100,000	7,100,000	-4,900,000
Net cash provided by continuing operating activities									3,200,000	-42,700,000	-56,200,000
Cash Flows from Continuing Investing Activities:
Capital expenditures									0	0	0
Acquisition of businesses, net of cash acquired										0
Net cash used in continuing investing activities									0	0	0
Cash Flows from Continuing Financing Activities:
Proceeds from issuance of common units of SunCoke Energy Partners, L.P., net of offering costs									0	0
Proceeds from issuance of long-term debt									0	0
Repayment of long-term debt									0	0	-3,300,000
Debt issuance costs									0	-1,600,000
Proceeds from revolving facility									0	0
Repayment of revolving facility									0
Cash distributions to noncontrolling interests									0	0	0
Shares repurchased									-85,100,000	-10,900,000	-9,400,000
Proceeds from exercise of stock options									2,900,000	2,500,000	4,700,000
Excess tax benefit from share-based awards									300,000
Dividends paid									-3,800,000
Net increase (decrease) in advances from affiliate									82,500,000	52,700,000	64,200,000
Net cash (used in) provided by continuing financing activities									-3,200,000	42,700,000	56,200,000
Net (decrease) increase in cash and cash equivalents from continuing operations									0	0	0
Cash flows from discontinued operations - operating activities									0	0	0
Cash flows from discontinued operations - investing activities									0	0	0
Net Cash Provided by (Used in) Discontinued Operations									0	0	0
Net (decrease) increase in cash and cash equivalents									0	0	0
Cash and cash equivalents at beginning of year				0				0	0	0	0
Cash and cash equivalents at end of year	0				0				0	0	0
Guarantor Subsidiaries
Cash Flows from Continuing Operating Activities:
Net (loss) income									-58,800,000	64,500,000	148,500,000
Adjustments to reconcile net income to net cash provided by continuing operating activities:
(Loss) income from discontinued operations, net of tax									106,000,000	15,500,000	-20,500,000
Asset impairment									16,800,000
Depreciation and amortization expense									25,500,000	25,200,000	22,300,000
Deferred income tax expense (benefit)									-14,300,000	500,000	-7,900,000
Payments in Excess of Expense for Retirement Plans									-8,100,000	-5,300,000	-9,600,000
Share-based compensation expense									0	0	0
Equity in Earnings of Subsidiaries									-56,000,000	-88,600,000	-95,500,000
Excess tax benefit from share-based awards									100,000
Loss from equity method investment									0	0
Loss on extinguishment/modification of debt									0
Changes in working capital pertaining to continuing operating activities (net of acquisitions):
Receivables									24,100,000	-23,600,000	-7,800,000
Inventories									-1,800,000	14,800,000	35,500,000
Accounts payable									-3,600,000	4,200,000	-55,900,000
Accrued liabilities									-19,100,000	-6,100,000	12,800,000
Interest payable									7,300,000	-7,300,000	7,300,000
Income taxes									-17,900,000	26,400,000	-1,100,000
Accrual for black lung benefits									11,500,000	-2,400,000	1,300,000
Other									200,000	4,100,000	-17,000,000
Net cash provided by continuing operating activities									11,900,000	21,900,000	12,400,000
Cash Flows from Continuing Investing Activities:
Capital expenditures									-12,600,000	-19,800,000	-20,900,000
Acquisition of businesses, net of cash acquired										0
Net cash used in continuing investing activities									-12,600,000	-19,800,000	-20,900,000
Cash Flows from Continuing Financing Activities:
Proceeds from issuance of common units of SunCoke Energy Partners, L.P., net of offering costs									0	0
Proceeds from issuance of long-term debt									0	0
Repayment of long-term debt									0	0	0
Debt issuance costs									0	0
Proceeds from revolving facility									0	0
Repayment of revolving facility									0
Cash distributions to noncontrolling interests									0	0	0
Shares repurchased									0	0	0
Proceeds from exercise of stock options									0	0	0
Excess tax benefit from share-based awards									0
Dividends paid									0
Net increase (decrease) in advances from affiliate									-57,000,000	-5,600,000	73,800,000
Net cash (used in) provided by continuing financing activities									-57,000,000	-5,600,000	73,800,000
Net (decrease) increase in cash and cash equivalents from continuing operations									-57,700,000	-3,500,000	65,300,000
Cash flows from discontinued operations - operating activities									-17,700,000	-5,400,000	62,100,000
Cash flows from discontinued operations - investing activities									-6,900,000	-13,300,000	-29,900,000
Net Cash Provided by (Used in) Discontinued Operations									-24,600,000	-18,700,000	32,200,000
Net (decrease) increase in cash and cash equivalents									-82,300,000	-22,200,000	97,500,000
Cash and cash equivalents at beginning of year				184,700,000				206,900,000	184,700,000	206,900,000	109,400,000
Cash and cash equivalents at end of year	102,400,000				184,700,000				102,400,000	184,700,000	206,900,000
Non- Guarantor Subsidiaries
Cash Flows from Continuing Operating Activities:
Net (loss) income									37,800,000	105,400,000	89,600,000
Adjustments to reconcile net income to net cash provided by continuing operating activities:
(Loss) income from discontinued operations, net of tax									0	0	0
Asset impairment									0
Depreciation and amortization expense									70,600,000	51,900,000	42,700,000
Deferred income tax expense (benefit)									1,500,000	0	39,300,000
Payments in Excess of Expense for Retirement Plans									0	-100,000	0
Share-based compensation expense									0	0	0
Equity in Earnings of Subsidiaries									0	0	0
Excess tax benefit from share-based awards									0
Loss from equity method investment									35,000,000	2,200,000
Loss on extinguishment/modification of debt									15,400,000
Changes in working capital pertaining to continuing operating activities (net of acquisitions):
Receivables									-14,100,000	6,500,000	2,100,000
Inventories									-8,700,000	16,100,000	22,300,000
Accounts payable									-23,900,000	21,600,000	-13,800,000
Accrued liabilities									1,700,000	-16,700,000	-1,800,000
Interest payable									400,000	11,900,000	-7,300,000
Income taxes									6,600,000	-13,000,000	700,000
Accrual for black lung benefits									0	0	0
Other									-7,400,000	-8,300,000	14,000,000
Net cash provided by continuing operating activities									114,900,000	177,500,000	187,800,000
Cash Flows from Continuing Investing Activities:
Capital expenditures									-105,700,000	-112,500,000	-33,300,000
Acquisition of businesses, net of cash acquired										-113,300,000
Equity method investment in VISA SunCoke Limited										-67,700,000
Net cash used in continuing investing activities									-105,700,000	-293,500,000	-33,300,000
Cash Flows from Continuing Financing Activities:
Proceeds from issuance of common units of SunCoke Energy Partners, L.P., net of offering costs									90,500,000	237,800,000
Proceeds from issuance of long-term debt									268,100,000	150,000,000
Repayment of long-term debt									-276,500,000	-225,000,000	0
Debt issuance costs									-5,800,000	-5,300,000
Proceeds from revolving facility									40,000,000	40,000,000
Repayment of revolving facility									-80,000,000
Cash distributions to noncontrolling interests									-32,300,000	-17,800,000	-2,300,000
Shares repurchased									0	0	0
Proceeds from exercise of stock options									0	0	0
Excess tax benefit from share-based awards									0
Dividends paid									0
Net increase (decrease) in advances from affiliate									-25,500,000	-47,100,000	-138,000,000
Net cash (used in) provided by continuing financing activities									-21,500,000	132,600,000	-140,300,000
Net (decrease) increase in cash and cash equivalents from continuing operations									-12,300,000	16,600,000	14,200,000
Cash flows from discontinued operations - operating activities									0	0	0
Cash flows from discontinued operations - investing activities									0	0	0
Net Cash Provided by (Used in) Discontinued Operations									0	0	0
Net (decrease) increase in cash and cash equivalents									-12,300,000	16,600,000	14,200,000
Cash and cash equivalents at beginning of year				48,900,000				32,300,000	48,900,000	32,300,000	18,100,000
Cash and cash equivalents at end of year	36,600,000				48,900,000				36,600,000	48,900,000	32,300,000
Combining and Consolidating Adjustments
Cash Flows from Continuing Operating Activities:
Net (loss) income									45,300,000	-144,800,000	-234,400,000
Adjustments to reconcile net income to net cash provided by continuing operating activities:
(Loss) income from discontinued operations, net of tax									0	0	0
Asset impairment									0
Depreciation and amortization expense									0	0	0
Deferred income tax expense (benefit)									0	0	0
Payments in Excess of Expense for Retirement Plans									0	0	0
Share-based compensation expense									0	0	0
Equity in Earnings of Subsidiaries									-45,300,000	144,800,000	234,400,000
Excess tax benefit from share-based awards									0
Loss from equity method investment									0	0
Loss on extinguishment/modification of debt									0
Changes in working capital pertaining to continuing operating activities (net of acquisitions):
Receivables									0	0	0
Inventories									0	0	0
Accounts payable									0	0	0
Accrued liabilities									0	0	0
Interest payable									0	0	0
Income taxes									0	0	0
Other									0	0	0
Net cash provided by continuing operating activities									0	0	0
Cash Flows from Continuing Investing Activities:
Capital expenditures									0	0	0
Acquisition of businesses, net of cash acquired										0
Net cash used in continuing investing activities									0	0	0
Cash Flows from Continuing Financing Activities:
Proceeds from issuance of common units of SunCoke Energy Partners, L.P., net of offering costs									0	0
Proceeds from issuance of long-term debt									0	0
Repayment of long-term debt									0	0	0
Debt issuance costs									0	0
Proceeds from revolving facility									0	0
Repayment of revolving facility									0
Cash distributions to noncontrolling interests									0	0	0
Shares repurchased									0	0	0
Proceeds from exercise of stock options									0	0	0
Excess tax benefit from share-based awards									0
Dividends paid									0
Net increase (decrease) in advances from affiliate									0	0	0
Net cash (used in) provided by continuing financing activities									0	0	0
Net (decrease) increase in cash and cash equivalents from continuing operations									0	0	0
Cash flows from discontinued operations - operating activities									0	0	0
Cash flows from discontinued operations - investing activities									0	0	0
Net Cash Provided by (Used in) Discontinued Operations									0	0	0
Net (decrease) increase in cash and cash equivalents									0	0	0
Cash and cash equivalents at beginning of year				0				0	0	0	0
Cash and cash equivalents at end of year	$0				$0				$0	$0	$0

Supplemental_Condensed_Consoli5

Supplemental Condensed Consolidating Financial Information (Details Textual) (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jul. 23, 2014
Guarantor Obligations [Line Items]
Discontinued Operation, Tax Effect of Income (Loss) from Disposal of Discontinued Operation	$66.20	$9.70	($5.30)
Supplemental Condensed Consolidating Financial Information (Textual) [Abstract]
Ownership percentage (as a percent)	100.00%
Supplemental Condensed Consolidating Financial Information (Additional Textual) [Abstract]
Preferred stock, par value	$0.01	$0.01
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$0.01	$0.01		$0.01
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares, issued	71,251,529	70,892,140
Treasury stock, shares	4,977,115	1,255,355
Guarantor Subsidiaries
Supplemental Condensed Consolidating Financial Information (Textual) [Abstract]
Guarantors obligations under the credit agreement	$240
SunCoke Energy Partners, L.P.
Supplemental Condensed Consolidating Financial Information (Textual) [Abstract]
Partnership net assets restricted (as a percent)	25.00%

Subsequent_Events_Details

Subsequent Events (Details) (USD $)

0 Months Ended

1 Months Ended

3 Months Ended

12 Months Ended

0 Months Ended

1 Months Ended

Oct. 23, 2014

Jul. 29, 2014

9-May-14

Oct. 31, 2014

Dec. 31, 2014

Sep. 30, 2014

Jun. 30, 2014

Mar. 31, 2014

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2014

Feb. 19, 2015

Jan. 31, 2015

Jan. 28, 2015

Jan. 13, 2015

Dec. 31, 2014

Jan. 31, 2015

Jul. 26, 2011

employee

employee

Subsequent Event [Line Items]

Interest in partnership (as a percent)

56.00%

55.90%

56.00%

56.00%

Ownership interest of general partnership (as a percent)

2.00%

2.00%

Debt assumed

$651,500,000

$689,100,000

$651,500,000

651,500,000

Interest payable

19,900,000

18,200,000

19,900,000

19,900,000

Ownership percentage held by public unitholders

43.90%

44.00%

Aggregate cost of share repurchases

75,000,000

Share repurchase program, remaining authorized repurchase amount

75,000,000

Cash dividend declared per share

$0.06

$0.06

$0

$0

$0

$0

$0

$0

$0

Subsequent Event

Subsequent Event [Line Items]

Interest in partnership (as a percent)

56.10%

Ownership interest of general partnership (as a percent)

2.00%

Ownership percentage held by public unitholders

41.90%

Aggregate cost of share repurchases

20,000,000

Share repurchase program, remaining authorized repurchase amount

55,000,000

Cash dividend declared per share

$0.06

Granite City | Subsequent Event

Subsequent Event [Line Items]

Interest in partnership (as a percent)

25.00%

Ownership interest of general partnership (as a percent)

2.00%

SunCoke Energy Partners, L.P. | Granite City | Subsequent Event

Subsequent Event [Line Items]

Interest sold (as a percent)

75.00%

Fair value of total consideration transferred

245,000,000

Interest payable

5,600,000

Redemption premium

7,700,000

Consideration withheld to pre-fund anticipated environmental remediation costs

45,000,000

Common Units | SunCoke Energy Partners, L.P. | Granite City | Subsequent Event

Subsequent Event [Line Items]

Value of equity received in transaction

50,700,000

General Partner | SunCoke Energy Partners, L.P. | Granite City | Subsequent Event

Subsequent Event [Line Items]

Value of equity received in transaction

1,000,000

Term Loans

Subsequent Event [Line Items]

Debt assumed

0

99,100,000

0

0

300,000,000

Term Loans | SunCoke Energy Partners, L.P. | Granite City | Subsequent Event

Subsequent Event [Line Items]

Debt assumed

135,000,000

Private Placement | SunCoke Energy Partners, L.P. | Subsequent Event

Subsequent Event [Line Items]

Debt assumed

200,000,000

Interest rate (as a percent)

7.38%

Coal Mining Business

Subsequent Event [Line Items]

Number of coal mining positions eliminated

400

Coal Mining Business | Subsequent Event

Subsequent Event [Line Items]

Number of coal mining positions eliminated

150