Centrus Energy (LEU) 10-Q 14 Nov 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Nov. 01, 2017
Document and Entity Information
Entity Registrant Name	CENTRUS ENERGY CORP
Entity Central Index Key	1,065,059
Trading Symbol	LEU
Current Fiscal Year End Date	--12-31
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		9,038,751
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Current Assets
Cash and cash equivalents	$ 135.9	$ 260.7
Accounts receivable, net	14.2	19.9
Inventories	124.1	177.4
Deferred costs associated with deferred revenue	94.5	89.3
Other current assets	15.6	13.3
Total current assets	384.3	560.6
Property, Plant and Equipment, Net	5.2	6
Deposits for surety bonds	29.6	29.5
Intangible assets	87.6	93.3
Other long-term assets	15.2	24.1
Total Assets	521.9	713.5
Current Liabilities
Accounts payable and accrued liabilities	50.7	46.4
Payables under SWU purchase agreements	17.3	59.6
Inventories owed to customers and suppliers	22.1	57.5
Deferred revenue	131.7	123.6
Decontamination and decommissioning obligations - current	16.6	38.6
Total current liabilities	238.4	325.7
Long-term debt	157.5	234.1
Postretirement health and life benefit obligations	170	171.3
Pension benefit liabilities	175	179.9
Other long-term liabilities	35.6	38.6
Total liabilities	776.5	949.6
Commitments and contingencies (Note 12)
Stockholders' Deficit
Excess of capital over par value	59.8	59.5
Accumulated deficit	(320)	(296.7)
Accumulated other comprehensive income (loss), net of tax	0.1	0.2
Total stockholders' deficit	(254.6)	(236.1)
Total Liabilities and Stockholders’ Equity (Deficit)	521.9	713.5
Preferred Series B [Member]
Stockholders' Deficit
Preferred stock	4.6	0
Common Class A [Member]
Stockholders' Deficit
Common stock	0.8	0.8
Common Class B [Member]
Stockholders' Deficit
Common stock	$ 0.1	$ 0.1

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Preferred Stock, Par Value Per Share	$ 1	$ 1
Preferred Stock, Shares Authorized	20,000,000	20,000,000
Preferred Stock, Shares Issued	104,574
Preferred Series B [Member]
Preferred Stock, Par Value Per Share	$ 1
Preferred Stock, Dividend Rate, Percentage	7.50%
Preferred Stock, Shares Issued	104,574
Preferred Stock, Liquidation Preference, Value	$ 109,600,000
Common Class A [Member]
Common Stock, Par or Stated Value Per Share	$ 0.10	$ 0.10
Common Stock, Shares Authorized	70,000,000	70,000,000
Common Stock, Shares, Issued	7,632,669	7,563,600
Common Class B [Member]
Common Stock, Par or Stated Value Per Share	$ 0.10	$ 0.10
Common Stock, Shares Authorized	30,000,000	30,000,000
Common Stock, Shares, Issued	1,406,082	1,436,400

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenue:
Contract services	$ 6,800	$ 7,300	$ 19,300	$ 32,200
Total Revenue	50,300	21,400	101,500	174,800
Cost of Sales:
Separative work units and uranium	32,400	15,900	76,800	130,700
Contract services	6,300	7,600	19,900	24,900
Total cost of sales	38,700	23,500	96,700	155,600
Gross profit (loss)	11,600	(2,100)	4,800	19,200
Advanced technology license and decommissioning costs	4,500	21,900	15,000	38,600
Selling, general and administrative	11,000	10,700	33,100	34,600
Amortization of intangible assets	2,500	1,700	5,700	7,600
Special charges for workforce reductions	2,400	600	7,100	1,200
Other (income)	(600)	(300)	(2,300)	(1,000)
Operating (loss)	(8,200)	(36,700)	(53,800)	(61,800)
Gain on early extinguishment of debt	0	0	(33,600)	(16,700)
Interest expense	700	4,700	4,300	14,800
Interest (income)	(400)	(100)	(1,000)	(500)
Income (loss) before income taxes	(8,500)	(41,300)	(23,500)	(59,400)
Provision (benefit) for income taxes	0	0	(200)	(600)
Net income (loss)	(8,500)	(41,300)	(23,300)	(58,800)
Preferred stock dividends, undeclared and cumulative	2,000	0	5,000	0
Net income (loss) allocable to common stockholders	$ (10,500)	$ (41,300)	$ (28,300)	$ (58,800)
Net loss per share - basic and diluted	$ (1.15)	$ (4.54)	$ (3.12)	$ (6.46)
Weighted-average number of shares outstanding:
Average Number of Shares Outstanding, Basic and Diluted	9,103	9,096	9,081	9,102
Separative Work Units [Member]
Revenue:
Revenue, Goods	$ 43,500	$ 14,100	$ 82,200	$ 128,300
Uranium [Member]
Revenue:
Revenue, Goods	$ 0	$ 0	$ 0	$ 14,300

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net income (loss)	$ (8.5)	$ (41.3)	$ (23.3)	$ (58.8)
Amortization of prior service costs (credits)	0	(0.1)	(0.1)	(0.2)
Other comprehensive income (loss), before tax		(0.1)	(0.1)	(0.2)
Income tax expense related to items of other comprehensive income	0	0	0	0
Other comprehensive income (loss), net of tax		(0.1)	(0.1)	(0.2)
Comprehensive income (loss)	$ (8.5)	$ (41.4)	$ (23.4)	$ (59)

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash Flows from Operating Activities
Net income (loss)	$ (23.3)	$ (58.8)
Adjustments to reconcile net income (loss) to net cash (used in) operating activities:
Depreciation and amortization	6.6	8.1
Interest on paid-in-kind toggle notes	1.2	9.7
Gain on early extinguishment of debt	(33.6)	(16.7)
Gain on sale of assets	(2.3)	(1)
Inventory valuation adjustment	0	3
Changes in operating assets and liabilities:
Accounts receivable – (increase) decrease	14.5	18.4
Inventories, net – (increase) decrease	17.9	45.8
Payables under SWU purchase agreements – increase (decrease)	(42.3)	(68.9)
Deferred revenue, net of deferred costs – increase (decrease)	2.9	5.8
Accounts payable and other liabilities – (decrease)	(35.3)	2.2
Other, net	(1.9)	0.5
Net Cash (Used in) Operating Activities	(95.6)	(51.9)
Cash Flows Provided by Investing Activities
Capital expenditures	(0.3)	(3)
Proceeds from sales of assets	(2.1)	(1.2)
Deposits for surety bonds - net decrease	0	0.3
Net Cash Provided by (Used in) Investing Activities	1.8	(1.5)
Cash Flows Used in Financing Activities
Payment of interest classified as debt	(3.4)	0
Repurchase of debt	(27.6)	(9.8)
Net Cash (Used in) Financing Activities	(31)	(9.8)
Net (Decrease)	(124.8)	(63.2)
Cash and Cash Equivalents at Beginning of Period	260.7	234
Cash and Cash Equivalents at End of Period	135.9	170.8
Supplemental Cash Flow Information:
Interest paid	4.2	6.5
Conversion of interest payable-in-kind to long-term debt	$ 0.4	$ 3.4

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Millions	Total	Preferred Stock [Member]	Preferred Stock [Member]Preferred Series B [Member]	Common Stock [Member]Common Class A [Member]	Common Stock [Member]Common Class B [Member]	Excess of Capital over Par Value [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance at Dec. 31, 2015	$ (165.7)	$ 0		$ 0.8	$ 0.1	$ 59	$ (229.7)	$ 4.1
Net income (loss)	(58.8)						(58.8)
Other comprehensive income, net of tax (Note 13)	(0.2)							(0.2)
Restricted and other common stock issued, net of amortization	0.4					0.4
Ending Balance at Sep. 30, 2016	(224.3)	$ 0		0.8	0.1	59.4	(288.5)	3.9
Beginning Balance at Dec. 31, 2016	(236.1)			0.8	0.1	59.5	(296.7)	0.2
Net income (loss)	(23.3)
Stock issued during period	4.6		$ 4.6
Other comprehensive income, net of tax (Note 13)	(0.1)							(0.1)
Restricted and other common stock issued, net of amortization	0.3					0.3
Ending Balance at Sep. 30, 2017	$ (254.6)		$ 4.6	$ 0.8	$ 0.1	$ 59.8	$ (320)	$ 0.1

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	BASIS OF PRESENTATION The unaudited condensed consolidated financial statements of Centrus Energy Corp. (“Centrus” or the “Company”), which include the accounts of the Company, its principal subsidiary United States Enrichment Corporation (“Enrichment Corp.”) and its other subsidiaries, as of September 30, 2017, and for the three and nine months ended September 30, 2017 and 2016, have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). The condensed consolidated balance sheet as of December 31, 2016, was derived from audited consolidated financial statements, but does not include all disclosures required by generally accepted accounting principles in the United States (“GAAP”). The unaudited condensed consolidated financial statements reflect all adjustments that are, in the opinion of management, necessary for a fair statement of the financial results for the interim period. Certain information and notes normally included in financial statements prepared in accordance with GAAP have been omitted pursuant to such rules and regulations. All material intercompany transactions have been eliminated. Operating results for the three and nine months ended September 30, 2017, are not necessarily indicative of the results that may be expected for the year ending December 31, 2017. The unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes and Management's Discussion and Analysis of Financial Condition and Results of Operations included in the Annual Report on Form 10-K for the year ended December 31, 2016. New Accounting Standards In May 2014, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers (Topic 606) . ASU 2014-09 introduces a new five-step revenue recognition model in which an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 also requires disclosures sufficient to enable users to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers, including qualitative and quantitative disclosures about contracts with customers, significant judgments and changes in judgments, and assets recognized from the costs to obtain or fulfill a contract. The FASB has since issued amendments that clarify a number of specific issues as well as require additional disclosures. The revenue recognition standard will become effective for the Company beginning with the first quarter of 2018. The Company has started an implementation process, including a review of customer contracts, to evaluate the effect this standard will have on its consolidated financial statements and related disclosures. The Company continues to assess the potential impacts of the new standard on its consolidated financial statements, including substantive new disclosures. The Company plans to select the modified retrospective transition method upon adoption effective January 1, 2018. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), which requires lessees to recognize a right-of-use asset and lease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting expense recognition in the statement of operations. ASU 2016-02 will become effective for the Company beginning in the first quarter of 2019, with early adoption permitted, and is to be applied using a modified retrospective approach. The Company is evaluating the effect that the provisions of ASU 2016-02 will have on its consolidated financial statements. In March 2016, the FASB issued ASU 2016-09, Stock Compensation - Improvements to Employee Share-Based Payment Accounting (Topic 718) . ASU 2016-09 simplifies several aspects of the accounting for share-based payment transactions, including income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. ASU 2016-09 became effective for the Company in the first quarter of 2017. Under ASU 2016-09, entities are permitted to make an accounting policy election to either estimate forfeitures on share-based payment awards, as previously required, or to recognize forfeitures as they occur. The Company has elected to recognize forfeitures as they occur. The adoption of ASU 2016-09 did not have a material impact on the Company’s consolidated financial statements. In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments . ASU 2016-15 addresses the presentation and classification of certain cash receipts and cash payments in the statement of cash flows. It is intended to reduce diversity in practice by providing guidance on eight specific cash flow issues. ASU 2016-15 will become effective for the Company beginning in the first quarter of 2018, with early adoption permitted, and is to be applied using a retrospective approach. The Company is evaluating the effect that the provisions of ASU 2016-15 will have on its consolidated financial statements. In October 2016, the FASB issued ASU 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory, requiring an entity to recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. ASU 2016-16 will become effective for the Company beginning in the first quarter of 2018, with early adoption permitted. The Company is evaluating the effect that the provisions of ASU 2016-16 will have on its consolidated financial statements. In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash . ASU 2016-18 requires that the statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. ASU 2016-18 is to be applied retrospectively for each period presented, and will become effective for the Company beginning in the first quarter of 2018, with early adoption permitted. The Company is evaluating the effect that the provisions of ASU 2016-18 will have on its consolidated financial statements. In March 2017, the FASB issued ASU 2017-07, Compensation-Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost . ASU 2017-07 requires changes to the presentation of the components of net periodic benefit cost on the statement of operations by requiring service cost to be presented with other employee compensation costs and other components of net periodic benefit cost to be presented outside of any subtotal of operating income. ASU 2017-07 also stipulates that only the service cost component of net benefit cost is eligible for capitalization in assets. The guidance will become effective for the Company beginning in the first quarter of 2018, with early adoption permitted. The Company is evaluating the effect that the provisions of ASU 2017-07 will have on its consolidated financial statements.

Special Charges

Special Charges	9 Months Ended
	Sep. 30, 2017
Restructuring and Related Activities [Abstract]
Special Charges	SPECIAL CHARGES Evolving Business Needs Evolving business needs have resulted in workforce reductions since 2013. In the nine months ended September 30, 2017, special charges included estimated employee termination benefits of $2.2 million , including $0.7 million in the three months ended September 30, 2017. Centrus expects to make payments primarily in the fourth quarter of 2017 related to the $1.4 million balance payable at September 30, 2017. In the second quarter of 2016, the Company commenced a project to align its corporate structure to the scale of its ongoing business operations and to update related information technology systems. The Company incurred advisory costs of $0.3 million and $0.8 million related to the reengineering project in the three and nine months ended September 30, 2016, respectively. The Company incurred advisory costs of $1.7 million and $5.0 million in the three and nine months ended September 30, 2017, respectively. Piketon Demonstration Facility In September 2015, Centrus completed a successful three-year demonstration of its American Centrifuge technology at its facility in Piketon, Ohio. The demonstration effort was primarily funded by the U.S. government. As a result of reduced program funding, Centrus incurred a special charge in the third quarter of 2015 for estimated employee termination benefits. Of the remaining $4.9 million liability as of September 30, 2017, $2.8 million is classified as current and included in Accounts Payable and Accrued Liabilities in the condensed consolidated balance sheet. The remaining $2.1 million is included in Other Long-Term Liabilities and is expected to be paid through 2019. A summary of termination benefit activity and related liabilities follows (in millions): Liability December 31, 2016 Nine Months Ended Liability Charges for Termination Benefits Paid/ Settled Workforce reductions: Evolving business needs $ 0.1 $ 2.2 $ (0.9 ) $ 1.4 Piketon demonstration facility 5.4 0.1 (0.6 ) 4.9 $ 5.5 $ 2.3 $ (1.5 ) $ 6.3

Contract Services and Advanced

Contract Services and Advanced Technology Costs	9 Months Ended
	Sep. 30, 2017
Research and Development [Abstract]
Contract Services and Advanced Technology Costs and Other Income	CONTRACT SERVICES AND ADVANCED TECHNOLOGY LICENSE AND DECOMMISSIONING COSTS The contract services segment includes Revenue and Cost of Sales for engineering and testing work Centrus performs on the American Centrifuge technology under a government contract with UT-Battelle, LLC (“UT-Battelle”), the operator of Oak Ridge National Laboratory (“ORNL”). The recently completed fixed priced contract between Centrus and UT-Battelle (the “2017 ORNL Contract”) was for the period from October 1, 2016, through September 30, 2017 and generated revenue of approximately $25 million . On October 26, 2017, the parties executed a new fixed priced contract for the period from October 1, 2017, through September 30, 2018, that is expected to generate total revenue of approximately $16 million upon completion of defined milestones. The ORNL contracts have been funded incrementally. Funding for the program is provided to UT-Battelle by the U.S. government which is currently operating under a continuing resolution. The 2017 ORNL Contract provided for payments for monthly reports of deliverables of approximately $2.0 million per month and additional aggregate payments of $1.0 million based on completion of defined milestones. The Company’s contract with UT-Battelle that ended September 30, 2016 (the “2016 ORNL Contract”), provided for payments for monthly reports of deliverables of approximately $2.7 million per month. The 2016 ORNL Contract, which was signed in March 2016, provided for payments for reports related to work performed since October 1, 2015. Revenue in the nine months ended September 30, 2016, includes $24.2 million for reports on work performed in the nine months ended September 30, 2016, and $8.1 million for March 2016 reports on work performed in the three months ended December 31, 2015. Expenses for contract work performed in the nine months ended September 30, 2016, are included in Cost of Sales . Expenses for work performed in the three months ended December 31, 2015, before entering into the 2016 ORNL Contract, were included in Advanced Technology License and Decommissioning Costs in 2015. American Centrifuge expenses that are outside of the Company’s contracts with UT-Battelle are included in Advanced Technology License and Decommissioning Costs, including ongoing costs to maintain the demobilized Piketon facility and our licenses from the U.S. Nuclear Regulatory Commission (“NRC”) at that location. In the second quarter of 2016, the Company commenced the decontamination and decommissioning (“D&D”) of the Piketon facility in accordance with the requirements of NRC and the U.S. Department of Energy (“DOE”). Refer to Note 12, Commitments and Contingencies , for additional details.

Accounts Receivable

Accounts Receivable	9 Months Ended
	Sep. 30, 2017
Accounts Receivable, Net, Current [Abstract]
Accounts Receivable	RECEIVABLES September 30, December 31, (in millions) Utility customers and other $ 9.1 $ 15.3 Contract services, primarily DOE 5.1 4.6 Accounts receivable $ 14.2 $ 19.9 Centrus formerly performed site services work under contracts with DOE at the former Portsmouth and Paducah gaseous diffusion plants. Overdue receivables from DOE of $14.2 million as of September 30, 2017, and $22.8 million as of December 31, 2016, are included in Other Long-Term Assets based on the extended timeframe expected to resolve the Company’s claims for payment. Centrus has unapplied payments from DOE that may be used, at DOE’s direction, (a) to pay for future services provided by the Company, or (b) to reduce outstanding receivables balances due from DOE. The balance of unapplied payments of $19.3 million as of September 30, 2017, and December 31, 2016, is included in Other Long-Term Liabilities pending resolution of the long-term receivables from DOE described above.

Inventories

Inventories	9 Months Ended
	Sep. 30, 2017
Inventory, Net [Abstract]
Inventories	INVENTORIES Centrus holds uranium at licensed locations in the form of natural uranium and as the uranium component of low enriched uranium (“LEU”). Centrus also holds separative work units (“SWU”) as the SWU component of LEU at licensed locations (e.g., fabricators) to meet book transfer requests by customers. Fabricators process LEU into fuel for use in nuclear reactors. Components of inventories follow (in millions): September 30, 2017 December 31, 2016 Current Assets Current Liabilities (a) Inventories, Net Current Assets Current Liabilities (a) Inventories, Net Separative work units $ 73.7 $ 3.2 $ 70.5 $ 115.8 $ 15.2 $ 100.6 Uranium 50.2 18.9 31.3 61.4 42.3 19.1 Materials and supplies 0.2 — 0.2 0.2 — 0.2 $ 124.1 $ 22.1 $ 102.0 $ 177.4 $ 57.5 $ 119.9 (a) Inventories owed to customers and suppliers, included in current liabilities, include SWU and uranium inventories owed to fabricators.

Property, Plant and Equipment P

Property, Plant and Equipment Property, Plant and Equipment	9 Months Ended
	Sep. 30, 2017
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	PROPERTY, PLANT AND EQUIPMENT September 30, December 31, (in millions) Property, plant and equipment, gross 6.9 6.8 Accumulated depreciation (1.7 ) (0.8 ) Property, plant and equipment, net $ 5.2 $ 6.0

Intangible Assets

Intangible Assets	9 Months Ended
	Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	INTANGIBLE ASSETS Intangible assets originated from the Company’s reorganization and application of fresh start accounting as of the date the Company emerged from bankruptcy, September 30, 2014, and reflect the conditions at that time. The intangible asset related to the sales order book is amortized as the order book existing at emergence is reduced, principally as a result of deliveries to customers. The intangible asset related to customer relationships is amortized using the straight-line method over the estimated average useful life of 15 years. Amortization expense is presented below gross profit on the condensed consolidated statements of operations. September 30, 2017 December 31, 2016 (in millions) Gross Carrying Amount Accumulated Amortization Net Amount Gross Carrying Amount Accumulated Amortization Net Amount Sales order book $ 54.6 $ 22.1 $ 32.5 $ 54.6 $ 19.9 $ 34.7 Customer relationships 68.9 13.8 55.1 68.9 10.3 58.6 Total $ 123.5 $ 35.9 $ 87.6 $ 123.5 $ 30.2 $ 93.3

Debt

Debt	9 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
Debt	DEBT A summary of long-term debt follows (in millions): Maturity September 30, 2017 December 31, 2016 8.25% Notes: Feb. 2027 Principal $ 74.3 $ — Interest 58.1 — 8.25% Notes 132.4 — 8% PIK Toggle Notes Sep. 2019 (a) 31.3 234.6 Subtotal 163.7 234.6 Less deferred issuance costs 0.1 0.5 Total debt 163.6 234.1 Less current portion 6.1 — Long-term debt $ 157.5 $ 234.1 (a) Maturity can be extended to September 2024 upon the satisfaction of certain funding conditions described below. Note Exchange On February 14, 2017, pursuant to an exchange offer and consent solicitation, Centrus exchanged $204.9 million principal amount of the Company’s 8% paid-in-kind (“PIK”) toggle notes (the “8% PIK Toggle Notes”) for $74.3 million principal amount of 8.25% notes due February 2027 (the “8.25% Notes”), 104,574 shares of Series B Preferred Stock with a liquidation preference of $1,000 per share, and $27.6 million of cash. The exchange is accounted for as a troubled debt restructuring (a “TDR”) under Accounting Standards Codification Subtopic 470-60, Debt-Troubled Debt Restructurings by Debtors . For an exchange classified as a TDR, if the future undiscounted cash flows of the newly issued debt and other consideration are less than the net carrying value of the original debt, a gain is recorded for the difference and the carrying value of the newly issued debt is adjusted to the future undiscounted cash flow amount and no future interest expense is recorded. All future interest payments on the newly issued debt reduce the carrying value. Accordingly, the Company recognizes the 8.25% Notes on the condensed consolidated balance sheet as the sum of the principal balance and all future interest payments. The Company recognized a gain of $33.6 million related to the note exchange for the quarter ended March 31, 2017, which is net of transaction costs of $9.0 million and previously deferred issuance costs related to the 8% PIK Toggle Notes of $0.4 million . Refer to Note 13, Stockholders’ Equity for details related to the newly issued preferred stock. 8.25% Notes Interest on the 8.25% Notes is payable semi-annually in arrears as of February 28 and August 31 based on a 360-day year consisting of twelve 30-day months. The 8.25% Notes mature on February 28, 2027. As described above, all future interest payment obligations on the 8.25% Notes are included in the carrying value of the 8.25% Notes. As a result, the Company’s reported interest expense will be less than its contractual interest payments throughout the term of the 8.25% Notes. As of September 30, 2017, $6.1 million of interest is recorded as current and classified as Accounts Payable and Accrued Liabilities in the condensed consolidated balance sheet. The 8.25% Notes rank equally in right of payment with all of our existing and future unsubordinated indebtedness other than our Issuer Senior Debt and our Limited Secured Acquisition Debt (each as defined below). The 8.25% Notes rank senior in right of payment to all of our existing and future subordinated indebtedness and to certain limited secured acquisition indebtedness of the Company (the “Limited Secured Acquisition Debt”). The Limited Secured Acquisition Debt includes (i) any indebtedness, the proceeds of which are used to finance all or a portion of an acquisition or similar transaction if any lender’s lien is solely limited to the assets acquired in such a transaction and (ii) any indebtedness, the proceeds of which are used to finance all or a portion of the American Centrifuge project or another next generation enrichment technology if any lender’s lien is solely limited to such assets, provided that a lien securing the 8.25% Notes that is junior with respect to the lien securing such indebtedness, will be effected for the 8.25% Notes, which will be limited to the assets acquired with such Limited Secured Acquisition Debt. The 8.25% Notes are subordinated in right of payment to certain indebtedness and obligations of the Company, as described in the 8.25% Notes Indenture (the “Issuer Senior Debt”), including (i) any indebtedness of the Company (inclusive of any indebtedness of Enrichment Corp.) under a future credit facility up to $50 million with a maximum net borrowing of $40 million after taking into account any minimum cash balance (unless a higher amount is approved with the consent of the holders of a majority of the aggregate principal amount of the 8.25% Notes then outstanding), (ii) any revolving credit facility to finance inventory purchases and related working capital needs, and (iii) any indebtedness of the Company to Enrichment Corp. under the secured intercompany notes. The 8.25% Notes are guaranteed on a subordinated and limited basis by, and secured by substantially all of the assets of, Enrichment Corp. The Enrichment Corp. guarantee is a secured obligation and ranks equally in right of payment with all existing and future unsubordinated indebtedness of Enrichment Corp. (other than Designated Senior Claims (as defined below) and Limited Secured Acquisition Debt) and senior in right of payment to all existing and future subordinated indebtedness of Enrichment Corp. and Limited Secured Acquisition Debt. The Enrichment Corp. guarantee is subordinated in right of payment to certain obligations of, and claims against, Enrichment Corp. described in the 8.25% Notes Indenture (collectively, the “Designated Senior Claims”), including obligations and claims: • under a future credit facility up to $50 million with a maximum net borrowing of $40 million after taking into account any minimum cash balance; • under any revolving credit facility to finance inventory purchases and related working capital needs; • held by or for the benefit of the Pension Benefit Guaranty Corporation (“PBGC”) pursuant to any settlement (including any required funding of pension plans); and • under surety bonds or similar obligations held by or on behalf of the U.S. government pursuant to regulatory requirements. The liens securing the Enrichment Corp. guarantee of the 8% PIK Toggle Notes and the 8.25% Notes are pari passu with each other, and are junior in priority with respect to the lien securing Limited Secured Acquisition Debt, which is limited to the assets acquired with such Limited Secured Acquisition Debt. 8% PIK Toggle Notes Interest on the 8% PIK Toggle Notes is payable semi-annually in arrears on March 31 and September 30 based on a 360-day year consisting of twelve 30-day months. The principal amount is increased by any payment of interest in the form of PIK payments. The Company has the option to pay up to 5.5% per annum of interest due on the 8% PIK Toggle Notes in the form of PIK payments. For the semi-annual interest periods ended March 31, 2017, and September 30, 2017, the Company elected to pay interest in the form of PIK payments at 5.5% per annum. Financing costs for the issuance of the 8% PIK Toggle Notes were deferred and are being amortized on a straight-line basis, which approximates the effective interest method, over the life of the 8% PIK Toggle Notes. The 8% PIK Toggle Notes mature on September 30, 2019. However, the maturity date can be extended to September 30, 2024, upon the satisfaction of certain funding conditions described in the Indenture relating to the funding, under binding agreements, of (i) the American Centrifuge project or (ii) the implementation and deployment of a National Security Train Program utilizing American Centrifuge technology. The 8% PIK Toggle Notes rank equally in right of payment with all existing and future unsubordinated indebtedness of the Company (other than the Issuer Senior Debt) and are senior in right of payment to all existing and future subordinated indebtedness of the Company. The 8% PIK Toggle Notes are subordinated in right of payment to the Issuer Senior Debt. The 8% PIK Toggle Notes are guaranteed and secured on a subordinated, conditional, and limited basis by Enrichment Corp. Enrichment Corp. will be released from its guarantee without the consent of the holders of the 8% PIK Toggle Notes upon the occurrence of certain termination events (other than with respect to an unconditional interest claim), including (i) the involuntary termination by the PBGC of any of the qualified pension plans of the Company or Enrichment Corp., (ii) the cessation of funding prior to completion of our ongoing American Centrifuge test programs or (iii) both a decision by the Company to abandon American Centrifuge technology and either (1) the efforts by the Company to commercialize another next generation enrichment technology funded at least in part by new capital provided or to be provided by Enrichment Corp. have been terminated or are no longer being pursued or (2) the attainment of capital necessary to commercialize another next generation enrichment technology with respect to which the Company is involved which does not include new capital provided or to be provided by Enrichment Corp. The Enrichment Corp. guarantee ranks equally in right of payment with all existing and future unsubordinated indebtedness of Enrichment Corp. (other than Designated Senior Claims and Limited Secured Acquisition Debt) and senior in right of payment to all existing and future subordinated indebtedness of Enrichment Corp. and Limited Secured Acquisition Debt. The Enrichment Corp. guarantee is subordinated in right of payment to Designated Senior Claims. As explained above, the liens securing the Enrichment Corp. guarantee of the 8% PIK Toggle Notes and the 8.25% Notes are pari passu with each other, and are junior in priority with respect to the lien securing Limited Secured Acquisition Debt, which is limited to the assets acquired with such Limited Secured Acquisition Debt.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements	FAIR VALUE Fair value is the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value of assets and liabilities, the following hierarchy is used in selecting inputs, with the highest priority given to Level 1, as these are the most transparent or reliable: • Level 1 – quoted prices for identical instruments in active markets. • Level 2 – quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which all significant inputs are observable in active markets. • Level 3 – valuations derived using one or more significant inputs that are not observable. Financial Instruments Recorded at Fair Value (in Millions) September 30, 2017 December 31, 2016 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets: Cash and cash equivalents $ 135.9 $ — $ — $ 135.9 $ 260.7 $ — $ — $ 260.7 Deferred compensation asset (a) 1.3 — — 1.3 1.1 — — 1.1 Liabilities: Deferred compensation obligation (a) 1.3 — — 1.3 1.1 — — 1.1 (a) The deferred compensation obligation represents the balance of deferred compensation plus net investment earnings. The deferred compensation plan is funded through a rabbi trust. Trust funds are invested in mutual funds for which unit prices are quoted in active markets and are classified within Level 1 of the valuation hierarchy. There were no transfers between Level 1, 2 or 3 during the periods presented. Other Financial Instruments As of September 30, 2017 , and December 31, 2016, the balance sheet carrying amounts for Accounts Receivable , Accounts Payable and Accrued Liabilities (excluding the deferred compensation obligation described above), and payables under SWU purchase agreements approximate fair value because of the short-term nature of the instruments. The carrying value and estimated fair value of long-term debt follow (in millions): September 30, 2017 December 31, 2016 Carrying Value Estimated Fair Value (a) Carrying Value Estimated Fair Value (a) 8.25% Notes $ 138.5 (b) $ 59.7 - - 8% PIK Toggle Notes 31.3 24.0 234.6 107.4 (a) Based on the most recent trading price as of the balance sheet date, which is considered a Level 2 input as of September 30, 2017, and a Level 1 input as of December 31, 2016, based on the frequency of trading. (b) The carrying value of the 8.25% Notes as of September 30, 2017, consists of the principal balance of $74.3 million and the sum of current and noncurrent interest payment obligations until maturity. Refer to Note 8, Debt .

Pension and Postretirement Heal

Pension and Postretirement Health and Life Benefits	9 Months Ended
	Sep. 30, 2017
Retirement Benefits, Description [Abstract]
Pension and Postretirement Health and Life Benefits	PENSION AND POSTRETIREMENT HEALTH AND LIFE BENEFITS The components of net periodic benefit cost (credit) for the defined benefit pension plans were as follows (in millions): Three Months Ended Nine Months Ended 2017 2016 2017 2016 Service costs $ 0.9 $ 1.0 $ 2.8 $ 2.9 Interest costs 8.0 8.9 24.1 26.6 Expected gains on plan assets (10.1 ) (10.6 ) (30.5 ) (31.6 ) Actuarial loss from remeasurement — — — 0.8 Net periodic benefit credit $ (1.2 ) $ (0.7 ) $ (3.6 ) $ (1.3 ) In the second quarter of 2016, the level of lump-sum payments under the non-qualified defined benefit pension plans resulted in the remeasurement of pension obligations under settlement accounting rules. The remeasurement resulted in a loss of $0.8 million included in Selling, General and Administrative Expenses in the second quarter of 2016. The loss includes the effect of a decrease in the discount rate used in the remeasurement of pension obligations from approximately 4.5% as of December 31, 2015, to approximately 3.7% as of June 30, 2016. The components of net periodic benefit cost for the postretirement health and life benefit plans were as follows (in millions): Three Months Ended Nine Months Ended 2017 2016 2017 2016 Interest costs $ 1.8 $ 2.1 $ 5.4 $ 6.1 Expected gains on plan assets — (0.1 ) — (0.2 ) Amortization of prior service credits, net — (0.1 ) (0.1 ) (0.2 ) Net periodic benefit cost $ 1.8 $ 1.9 $ 5.3 $ 5.7

Net Income Per Share

Net Income Per Share	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Net Income (Loss) Per Share	NET INCOME (LOSS) PER COMMON SHARE Basic net income (loss) per common share is calculated by dividing income (loss) allocable to common stockholders by the weighted average number of shares of common stock outstanding during the period. In calculating diluted net income (loss) per common share, the number of shares is increased by the weighted average number of potential shares related to stock compensation awards. No dilutive effect is recognized in a period in which a net loss has occurred. Three Months Ended Nine Months Ended 2017 2016 2017 2016 Net loss allocable to common stockholders (in millions) $ (10.5 ) $ (41.3 ) $ (28.3 ) $ (58.8 ) Shares in thousands: Average common shares outstanding - basic 9,103 9,096 9,081 9,102 Potentially dilutive shares related to stock options (a) — — — — Average common shares outstanding - diluted 9,103 9,096 9,081 9,102 Net loss per common share – basic and diluted $ (1.15 ) $ (4.54 ) $ (3.12 ) $ (6.46 ) (a) Common stock equivalents excluded from the diluted calculation as a result of a net loss in the period (in thousands) 13 14 60 7 Options outstanding and considered anti-dilutive as their exercise price exceeded the average share market price (in thousands) 327 375 30 490

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2017
Stockholders' Equity Attributable to Parent [Abstract]
Stockholders' Equity Note Disclosure [Text Block]	STOCKHOLDERS’ EQUITY Series B Preferred Stock On February 14, 2017, Centrus issued 104,574 shares of Series B Preferred Stock as part of the securities exchange described in Note 8, Debt . The issuance of the Series B Preferred Stock was a non-cash financing transaction. The Series B Preferred Stock has a par value of $1.00 per share and a liquidation preference of $1,000 per share (the “Liquidation Preference”). The Series B Preferred Stock is recorded on the condensed consolidated balance sheet at fair value less transaction costs, or $4.6 million as of September 30, 2017. Holders of the Series B Preferred Stock are entitled to cumulative dividends of 7.5% per annum of the Liquidation Preference. Centrus is obligated to pay cash dividends on the Series B Preferred Stock in an amount equal to the Liquidation Preference to the extent that dividends are declared by the Board and: (a) its pension plans and Enrichment Corp.’s pension plans are at least 90% funded on a variable rate premium calculation in the current plan year; (b) its net income calculated in accordance with GAAP (excluding the effect of pension remeasurement) for the immediately preceding fiscal quarter exceeds $7.5 million ; (c) its free cash flow (defined as the sum of cash provided by (used in) operating activities and cash provided by (used in) investing activities) for the immediately preceding four fiscal quarters exceeds $35 million ; (d) the balance of cash and cash equivalents calculated in accordance with GAAP on the last day of the immediately preceding quarter would exceed $150 million after pro forma application of the dividend payment; and (e) dividends may be legally paid under Delaware law. Centrus has not met these criteria for the periods from issuance through September 30, 2017, and has not declared, accrued or paid dividends on the Series B Preferred Stock as of September 30, 2017. Dividends on the Series B Preferred Stock are cumulative to the extent not paid at any quarter-end, whether or not declared and whether or not there are assets of the Company legally available for the payment of such dividends in whole or in part. As of September 30, 2017, the Series B Preferred Stock has an aggregate liquidation preference of $109.6 million , including accumulated dividends of $5.0 million . Outstanding shares of the Series B Senior Preferred Stock are redeemable at the Company’s option, in whole or in part, for an amount of cash equal to the Liquidation Preference, plus an amount equal to the accrued and unpaid dividends, if any, whether or not declared, through date of redemption. Rights Agreement On April 6, 2016 (the “Effective Date”), the Company’s Board of Directors (the “Board”) adopted a Section 382 Rights Agreement (the “Rights Agreement”). The Board adopted the Rights Agreement in an effort to protect shareholder value by, among other things, attempting to protect against a possible limitation on the Company’s ability to use its net operating loss carryforwards and other tax benefits, which may be used to reduce potential future income tax obligations. As reported on the Company’s Annual Report on Form 10-K for the year ended December 31, 2016, the Company had federal net operating losses of $725.8 million as of December 31, 2016, that currently expire through 2036. In connection with the adoption of the Rights Agreement, the Board declared a dividend of one preferred-share-purchase-right for each share of the Company’s Class A Common Stock and Class B Common Stock outstanding as of the Effective Date. The rights initially trade together with the common stock and are not exercisable. In the absence of further action by the Board, the rights would generally become exercisable and allow a holder to acquire shares of a new series of the Company’s preferred stock if any person or group acquires 4.99% or more of the outstanding shares of the Company’s common stock, or if a person or group that already owns 4.99% or more of the Company’s Class A Common Stock acquires additional shares representing 0.5% or more of the outstanding shares of the Company’s Class A Common Stock. The rights beneficially owned by the acquirer would become null and void, resulting in significant dilution in the ownership interest of such acquirer. The Board may exempt any acquisition of the Company’s common stock from the provisions of the Rights Agreement if it determines that doing so would not jeopardize or endanger the Company’s use of its tax assets or is otherwise in the best interests of the Company. The Board also has the ability to amend or terminate the Rights Agreement prior to a triggering event. Effective on February 14, 2017, in connection with the settlement and completion of the exchange offer and consent solicitation, the Company amended the Rights Agreement solely to exclude acquisitions of the Series B Preferred Stock issued as part of the exchange offer and consent solicitation from the definition of “Common Shares.” The Company’s stockholders approved the Rights Agreement at the 2017 annual meeting of stockholders on May 31, 2017. Unless earlier terminated in accordance with the Rights Agreement, the rights issued under the Rights Agreement expire on April 6, 2019. Stock-Based Compensation A summary of stock-based compensation costs follows (in millions): Three Months Ended Nine Months Ended 2017 2016 2017 2016 Total stock-based compensation costs: Restricted stock units $ — $ — $ — $ 0.1 Stock options 0.1 0.1 0.3 0.3 Expense included in selling, general and administrative expense $ 0.1 $ 0.1 $ 0.3 $ 0.4 Total recognized tax benefit $ — $ — $ — $ — As of September 30, 2017, there was $0.5 million of unrecognized compensation cost related to unvested stock-based payments granted, of which $0.4 million relates to stock options and $0.1 million relates to unvested restricted stock units. That cost is expected to be recognized over a weighted-average period of 1.2 years. Stock-based compensation cost is measured at the grant date, based on the fair value of the award, and is recognized on a straight-line basis over the requisite service period. Stock options vest and become exercisable in equal annual installments over a three- or four-year period and expire 10 years from the date of grant. Assumptions used in the Black-Scholes option pricing model to value option grants follow. There were no option grants in the nine months ended September 30, 2017. Nine Months Ended Risk-free interest rate 1.9% Expected volatility 75% Expected option life (years) 6 Weighted-average grant date fair value $1.77 Options granted (in thousands) 15 A total of 30,000 restricted stock units were issued to non-employee, independent members of the Board of Directors in the nine months ended September 30, 2017, including 5,000 restricted stock units in the three months ended September 30, 2017. The restricted stock units vest on the earlier of May 31, 2018, or the date of the 2018 Annual Meeting, absent a defined event that would accelerate vesting. Settlement of restricted stock units is made in shares of Class A Common Stock only upon the director’s retirement or other end of service. Shares Outstanding A total of 38,751 shares of Class A Common Stock were issued in settlement of vested restricted stock units to three former members of the Board of Directors following the end of their service on May 31, 2017. Shares of Class B Common Stock that are sold in the market are converted to shares of Class A Common Stock. In the nine months ended September 30, 2017, a total of 30,318 shares of Class B Common Stock were sold in the market and converted to shares of Class A Common Stock as of September 30, 2017. Changes in the number of shares outstanding follow: Preferred Stock, Series B Common Stock, Class A Common Stock, Class B Balance at December 31, 2015 — 7,563,600 1,436,400 Balance at September 30, 2016 — 7,563,600 1,436,400 Balance at December 31, 2016 — 7,563,600 1,436,400 Issuance of Preferred Stock 104,574 — — Issuance of Class A Common Stock — 38,751 — Conversion of Common Stock from Class B to Class A — 30,318 (30,318 ) Balance at September 30, 2017 104,574 7,632,669 1,406,082 Accumulated Other Comprehensive Income (Loss) The sole component of accumulated other comprehensive income (loss) (“AOCI”) relates to activity in the accounting for pension and postretirement health and life benefit plans. Amortization of prior service credits is reclassified from AOCI and included in the computation of net periodic benefit cost as detailed in Note 10, Pension and Post-Retirement Health and Life Benefits .

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES American Centrifuge Milestones Under the 2002 DOE-USEC Agreement The Company and DOE signed an agreement dated June 17, 2002, as amended (the “2002 DOE-USEC Agreement”), pursuant to which the parties made long-term commitments directed at resolving issues related to the stability and security of the domestic uranium enrichment industry. DOE consented to the assumption by Centrus of the 2002 DOE-USEC Agreement and other agreements between the Company and DOE subject to an express reservation of all rights, remedies and defenses by DOE and Centrus under those agreements as part of the Company’s Chapter 11 bankruptcy process. The 2002 DOE-USEC Agreement requires Centrus to develop, demonstrate and deploy advanced enrichment technology in accordance with milestones and provides for remedies in the event of a failure to meet a milestone under certain circumstances. DOE has specific remedies under the 2002 DOE-USEC Agreement if Centrus fails to meet a milestone that would adversely impact its ability to begin commercial operations of the American Centrifuge Plant on schedule, and such delay was within Centrus’ control or was due to its fault or negligence or if Centrus abandons or constructively abandons the commercial deployment of an advanced enrichment technology. These remedies include terminating the 2002 DOE-USEC Agreement, revoking Centrus’ access to DOE’s centrifuge technology that is required for the success of the American Centrifuge project, requiring Centrus to transfer certain rights in the American Centrifuge technology and facilities to DOE, and requiring Centrus to reimburse DOE for certain costs associated with the American Centrifuge project. The 2002 DOE-USEC Agreement provides that if a delaying event beyond the control and without the fault or negligence of Centrus occurs that could affect Centrus’ ability to meet an American Centrifuge Plant milestone, DOE and Centrus will jointly meet to discuss in good faith possible adjustments to the milestones as appropriate to accommodate the delaying event. The Company notified DOE that it had not met the June 2014 milestone within the time period provided due to events beyond its control and without the fault or negligence of the Company. The assumption of the 2002 DOE-USEC Agreement provided for under the Plan of Reorganization did not affect the ability of either party to assert all rights, remedies and defenses under the agreement and all such rights, remedies and defenses are specifically preserved and all time limits tolled expressly including all rights, remedies and defenses and time limits relating to any missed milestones. DOE and Centrus have agreed that all rights, remedies and defenses of the parties with respect to any missed milestones since March 5, 2014, including the June 2014 and November 2014 milestones, and all other matters under the 2002 DOE-USEC Agreement continued to be preserved, and that the time limits for each party to respond to any missed milestones continue to be tolled. Piketon Facility Costs and D&D Obligations Effective October 1, 2015, the U.S. government discontinued funding of the American Centrifuge demonstration cascade at Piketon. Funding for American Centrifuge is now limited to research and development work at the Company’s facilities in Oak Ridge, Tennessee. As a result of reduced program funding, Centrus incurred a special charge in the third quarter of 2015 for estimated employee termination benefits, and began reductions in force. Refer to Note 2, Special Charges , for details. Centrus began to incur expenditures in the second quarter of 2016 associated with the D&D of the Piketon facility in accordance with the requirements of the NRC and DOE. Centrus leases the Piketon facility from DOE. At the conclusion of the lease on June 30, 2019, without mutual agreement between Centrus and DOE regarding other possible uses for the facility, Centrus is obligated to return the facility to DOE in a condition that meets NRC requirements and in the same condition as the facility was in when it was leased to Centrus (other than due to normal wear and tear). Centrus must remove all Company-owned capital improvements at the Piketon facility, unless otherwise consented to by DOE, by the conclusion of the lease term. The D&D work is expected to extend through 2017 and be substantially completed by year-end. As of September 30, 2017, Centrus has accrued $16.6 million on the balance sheet as Decontamination and Decommissioning Obligations for the estimated fair value of the remaining costs to complete the D&D work. Centrus is required to provide financial assurance to the NRC and DOE for D&D costs under a regulatorily-prescribed methodology that includes potential contingent costs and reserves. As of September 30, 2017, Centrus has provided financial assurance to the NRC and DOE in the form of surety bonds that are fully cash collateralized by Centrus for $29.6 million . Centrus expects to receive cash when surety bonds are reduced and/or cancelled as the Company fulfills its D&D and lease obligations. Centrus has received state economic incentives in exchange for commitments by the Company to make investments in capital improvements and employee training. Should the commitments under the incentive agreements not be met, the Company may be required to repay a portion of the state incentives.

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2017
Share-based Compensation [Abstract]
Stock-Based Compensation	Stock-Based Compensation A summary of stock-based compensation costs follows (in millions): Three Months Ended Nine Months Ended 2017 2016 2017 2016 Total stock-based compensation costs: Restricted stock units $ — $ — $ — $ 0.1 Stock options 0.1 0.1 0.3 0.3 Expense included in selling, general and administrative expense $ 0.1 $ 0.1 $ 0.3 $ 0.4 Total recognized tax benefit $ — $ — $ — $ — As of September 30, 2017, there was $0.5 million of unrecognized compensation cost related to unvested stock-based payments granted, of which $0.4 million relates to stock options and $0.1 million relates to unvested restricted stock units. That cost is expected to be recognized over a weighted-average period of 1.2 years. Stock-based compensation cost is measured at the grant date, based on the fair value of the award, and is recognized on a straight-line basis over the requisite service period. Stock options vest and become exercisable in equal annual installments over a three- or four-year period and expire 10 years from the date of grant. Assumptions used in the Black-Scholes option pricing model to value option grants follow. There were no option grants in the nine months ended September 30, 2017. Nine Months Ended Risk-free interest rate 1.9% Expected volatility 75% Expected option life (years) 6 Weighted-average grant date fair value $1.77 Options granted (in thousands) 15 A total of 30,000 restricted stock units were issued to non-employee, independent members of the Board of Directors in the nine months ended September 30, 2017, including 5,000 restricted stock units in the three months ended September 30, 2017. The restricted stock units vest on the earlier of May 31, 2018, or the date of the 2018 Annual Meeting, absent a defined event that would accelerate vesting. Settlement of restricted stock units is made in shares of Class A Common Stock only upon the director’s retirement or other end of service.

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2017
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Segment Information	SEGMENT INFORMATION Centrus has two reportable segments: the LEU segment with two components, SWU and uranium, and the contract services segment. The LEU segment includes sales of the SWU component of LEU, sales of both the SWU and uranium components of LEU, and sales of uranium. The contract services segment includes revenue and cost of sales for work that Centrus performs under a fixed-price agreement as a contractor to UT-Battelle. The contract services segment also includes limited services provided by Centrus to DOE and its contractors at the Piketon facility. Gross profit is Centrus’ measure for segment reporting. There were no intersegment sales in the periods presented. For additional details on each segment, refer to Item 2, Management’s Discussion and Analysis of Financial Condition and Results of Operations . Three Months Ended Nine Months Ended 2017 2016 2017 2016 (in millions) Revenue LEU segment: Separative work units $ 43.5 $ 14.1 $ 82.2 $ 128.3 Uranium — — — 14.3 43.5 14.1 82.2 142.6 Contract services segment 6.8 7.3 19.3 32.2 Revenue $ 50.3 $ 21.4 $ 101.5 $ 174.8 Segment Gross Profit (Loss) LEU segment $ 11.1 $ (1.8 ) $ 5.4 $ 11.9 Contract services segment 0.5 (0.3 ) (0.6 ) 7.3 Gross profit (loss) $ 11.6 $ (2.1 ) $ 4.8 $ 19.2

Special Charges Special Charges

Special Charges Special Charges (Tables)	9 Months Ended
	Sep. 30, 2017
Restructuring and Related Activities [Abstract]
Restructuring and Related Costs [Table Text Block]	A summary of termination benefit activity and related liabilities follows (in millions): Liability December 31, 2016 Nine Months Ended Liability Charges for Termination Benefits Paid/ Settled Workforce reductions: Evolving business needs $ 0.1 $ 2.2 $ (0.9 ) $ 1.4 Piketon demonstration facility 5.4 0.1 (0.6 ) 4.9 $ 5.5 $ 2.3 $ (1.5 ) $ 6.3

Accounts Receivable (Tables)

Accounts Receivable (Tables)	9 Months Ended
	Sep. 30, 2017
Accounts Receivable, Net, Current [Abstract]
Schedule of Accounts Receivable	September 30, December 31, (in millions) Utility customers and other $ 9.1 $ 15.3 Contract services, primarily DOE 5.1 4.6 Accounts receivable $ 14.2 $ 19.9

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Sep. 30, 2017
Inventory, Net [Abstract]
Schedule of Inventories	Components of inventories follow (in millions): September 30, 2017 December 31, 2016 Current Assets Current Liabilities (a) Inventories, Net Current Assets Current Liabilities (a) Inventories, Net Separative work units $ 73.7 $ 3.2 $ 70.5 $ 115.8 $ 15.2 $ 100.6 Uranium 50.2 18.9 31.3 61.4 42.3 19.1 Materials and supplies 0.2 — 0.2 0.2 — 0.2 $ 124.1 $ 22.1 $ 102.0 $ 177.4 $ 57.5 $ 119.9 (a) Inventories owed to customers and suppliers, included in current liabilities, include SWU and uranium inventories owed to fabricators.

Property, Plant and Equipment26

Property, Plant and Equipment Property, Plant and Equipment (Tables)	9 Months Ended
	Sep. 30, 2017
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	September 30, December 31, (in millions) Property, plant and equipment, gross 6.9 6.8 Accumulated depreciation (1.7 ) (0.8 ) Property, plant and equipment, net $ 5.2 $ 6.0

Intangible Assets (Tables)

Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Intangible Assets and Excess Reorganization Value [Table Text Block]	September 30, 2017 December 31, 2016 (in millions) Gross Carrying Amount Accumulated Amortization Net Amount Gross Carrying Amount Accumulated Amortization Net Amount Sales order book $ 54.6 $ 22.1 $ 32.5 $ 54.6 $ 19.9 $ 34.7 Customer relationships 68.9 13.8 55.1 68.9 10.3 58.6 Total $ 123.5 $ 35.9 $ 87.6 $ 123.5 $ 30.2 $ 93.3

Debt Schedule of Debt (Tables)

Debt Schedule of Debt (Tables)	9 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
Schedule of Debt [Table Text Block]	A summary of long-term debt follows (in millions): Maturity September 30, 2017 December 31, 2016 8.25% Notes: Feb. 2027 Principal $ 74.3 $ — Interest 58.1 — 8.25% Notes 132.4 — 8% PIK Toggle Notes Sep. 2019 (a) 31.3 234.6 Subtotal 163.7 234.6 Less deferred issuance costs 0.1 0.5 Total debt 163.6 234.1 Less current portion 6.1 — Long-term debt $ 157.5 $ 234.1

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Schedule of Financial Instruments Recorded at Fair Value	Financial Instruments Recorded at Fair Value (in Millions) September 30, 2017 December 31, 2016 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets: Cash and cash equivalents $ 135.9 $ — $ — $ 135.9 $ 260.7 $ — $ — $ 260.7 Deferred compensation asset (a) 1.3 — — 1.3 1.1 — — 1.1 Liabilities: Deferred compensation obligation (a) 1.3 — — 1.3 1.1 — — 1.1 (a) The deferred compensation obligation represents the balance of deferred compensation plus net investment earnings. The deferred compensation plan is funded through a rabbi trust. Trust funds are invested in mutual funds for which unit prices are quoted in active markets and are classified within Level 1 of the valuation hierarchy.

Pension and Postretirement He30

Pension and Postretirement Health and Life Benefits (Tables)	9 Months Ended
	Sep. 30, 2017
Pension Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Schedule of Net Benefit Costs	The components of net periodic benefit cost (credit) for the defined benefit pension plans were as follows (in millions): Three Months Ended Nine Months Ended 2017 2016 2017 2016 Service costs $ 0.9 $ 1.0 $ 2.8 $ 2.9 Interest costs 8.0 8.9 24.1 26.6 Expected gains on plan assets (10.1 ) (10.6 ) (30.5 ) (31.6 ) Actuarial loss from remeasurement — — — 0.8 Net periodic benefit credit $ (1.2 ) $ (0.7 ) $ (3.6 ) $ (1.3 )
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Schedule of Net Benefit Costs	The components of net periodic benefit cost for the postretirement health and life benefit plans were as follows (in millions): Three Months Ended Nine Months Ended 2017 2016 2017 2016 Interest costs $ 1.8 $ 2.1 $ 5.4 $ 6.1 Expected gains on plan assets — (0.1 ) — (0.2 ) Amortization of prior service credits, net — (0.1 ) (0.1 ) (0.2 ) Net periodic benefit cost $ 1.8 $ 1.9 $ 5.3 $ 5.7

Net Income Per Share (Tables)

Net Income Per Share (Tables)	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Schedule of Net Income Per Share	Three Months Ended Nine Months Ended 2017 2016 2017 2016 Net loss allocable to common stockholders (in millions) $ (10.5 ) $ (41.3 ) $ (28.3 ) $ (58.8 ) Shares in thousands: Average common shares outstanding - basic 9,103 9,096 9,081 9,102 Potentially dilutive shares related to stock options (a) — — — — Average common shares outstanding - diluted 9,103 9,096 9,081 9,102 Net loss per common share – basic and diluted $ (1.15 ) $ (4.54 ) $ (3.12 ) $ (6.46 ) (a) Common stock equivalents excluded from the diluted calculation as a result of a net loss in the period (in thousands) 13 14 60 7 Options outstanding and considered anti-dilutive as their exercise price exceeded the average share market price (in thousands) 327 375 30 490

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2017
Stockholders' Equity Attributable to Parent [Abstract]
Schedule of Stock by Class [Table Text Block]	Changes in the number of shares outstanding follow: Preferred Stock, Series B Common Stock, Class A Common Stock, Class B Balance at December 31, 2015 — 7,563,600 1,436,400 Balance at September 30, 2016 — 7,563,600 1,436,400 Balance at December 31, 2016 — 7,563,600 1,436,400 Issuance of Preferred Stock 104,574 — — Issuance of Class A Common Stock — 38,751 — Conversion of Common Stock from Class B to Class A — 30,318 (30,318 ) Balance at September 30, 2017 104,574 7,632,669 1,406,082

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2017
Share-based Compensation [Abstract]
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]	A summary of stock-based compensation costs follows (in millions): Three Months Ended Nine Months Ended 2017 2016 2017 2016 Total stock-based compensation costs: Restricted stock units $ — $ — $ — $ 0.1 Stock options 0.1 0.1 0.3 0.3 Expense included in selling, general and administrative expense $ 0.1 $ 0.1 $ 0.3 $ 0.4 Total recognized tax benefit $ — $ — $ — $ —

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2017
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Segment Reporting Information	Three Months Ended Nine Months Ended 2017 2016 2017 2016 (in millions) Revenue LEU segment: Separative work units $ 43.5 $ 14.1 $ 82.2 $ 128.3 Uranium — — — 14.3 43.5 14.1 82.2 142.6 Contract services segment 6.8 7.3 19.3 32.2 Revenue $ 50.3 $ 21.4 $ 101.5 $ 174.8 Segment Gross Profit (Loss) LEU segment $ 11.1 $ (1.8 ) $ 5.4 $ 11.9 Contract services segment 0.5 (0.3 ) (0.6 ) 7.3 Gross profit (loss) $ 11.6 $ (2.1 ) $ 4.8 $ 19.2

Special Charges (Table) (Detail

Special Charges (Table) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Dec. 31, 2016
Termination benefit costs		$ 2.3
Payments for one-time termination benefits		(1.5)
Restructuring liability	$ 6.3	6.3	$ 5.5
Contract Reduction [Member]
Termination benefit costs		0.1
Payments for one-time termination benefits		(0.6)
Restructuring liability	4.9	4.9	5.4
Other Restructuring [Member]
Termination benefit costs	0.7	2.2
Payments for one-time termination benefits		(0.9)
Restructuring liability	$ 1.4	$ 1.4	$ 0.1

Special Charges Special Charg36

Special Charges Special Charges (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Termination benefit costs			$ 2.3
Other Restructuring Costs	$ 1.7	$ 0.3	5	$ 0.8
Contract Termination [Member]
Termination benefit costs			0.1
Restructuring liability, current	2.8		2.8
Restructuring liability, noncurrent	$ 2.1		$ 2.1

Contract Services and Advance37

Contract Services and Advanced Technology Costs (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Contract monthly revenue			$ 2
Contract revenue current work	$ 24.2
Contract revenue past work	$ 8.1
2018 ORNL Contract [Member] | Scenario, Forecast [Member]
Contract value		$ 16
2017 ORNL Contract [Member]
Contract value			25
Contract milestone payments			$ 1
2016 ORNL Contract [Member]
Contract monthly revenue				$ 2.7

Accounts Receivable (Schedule o

Accounts Receivable (Schedule of Accounts Receivable) (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Accounts Receivable, Net, Current [Abstract]
Utility Customer Receivables	$ 9.1	$ 15.3
Contract Services Customer Receivables	5.1	4.6
Accounts Receivable, Net	$ 14.2	$ 19.9

Accounts Receivable (Narrative)

Accounts Receivable (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Other long-term liabilities	$ 35.6	$ 38.6
Government [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Net, Noncurrent	14.2	22.8
Other long-term liabilities	$ 19.3	$ 19.3

Inventories (Schedule of Invent

Inventories (Schedule of Inventories) (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Inventory, Net [Abstract]
Separative work units inventory	$ 73.7	$ 115.8
Uranium inventory	50.2	61.4
Materials and supplies	0.2	0.2
Inventories	124.1	177.4
Separative work units owed to customers and suppliers	3.2	15.2
Uranium owed to customers and suppliers	18.9	42.3
Inventories owed to customers and suppliers	22.1	57.5
Separative work units net of liability	70.5	100.6
Uranium inventory net of liability	31.3	19.1
Inventories, net	$ 102	$ 119.9

Property, Plant and Equipment41

Property, Plant and Equipment Property, Plant and Equipment (Tables) (Details) (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 6.9	$ 6.8
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	(1.7)	(0.8)
Property, Plant and Equipment, Net	$ 5.2	$ 6

Intangible Assets Schedule of I

Intangible Assets Schedule of Intangible Assets and Excess Reorganization Value (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross	$ 123.5	$ 123.5
Accumulated intangible asset amortization	(35.9)	(30.2)
Amortizable intangible assets, net	$ 87.6	93.3
Average useful life of finite-lived intangible assets	15 years
Contract-Based Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross	$ 54.6	54.6
Accumulated intangible asset amortization	(22.1)	(19.9)
Amortizable intangible assets, net	32.5	34.7
Customer-Related Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross	68.9	68.9
Accumulated intangible asset amortization	(13.8)	(10.3)
Amortizable intangible assets, net	$ 55.1	$ 58.6

Debt Schedule of Debt (Details)

Debt Schedule of Debt (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Long-term debt, carrying amount	$ 163.7	$ 234.6
Deferred issuance costs	0.1	0.5
Long-term debt, current and noncurrent	163.6	234.1
Long-term debt, current	6.1
Long-term debt	157.5	234.1
Senior Notes [Member]
Debt Instrument [Line Items]
Long-term debt, face amount	74.3
Long-term debt, interest	58.1
Long-term debt, carrying amount	132.4
Debt Instrument Carrying Amount Current and Noncurrent	138.5
Payment in Kind (PIK) Note [Member]
Debt Instrument [Line Items]
Long-term debt, carrying amount		234.6
Debt Instrument Carrying Amount Current and Noncurrent	$ 31.3	$ 234.6

Debt (Narrative) (Details)

Debt (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2017	Mar. 31, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Preferred stock, shares issued	104,574			104,574
Preferred stock, liquidation preference per share	$ 1,000			$ 1,000
Cash paid in exchange		$ 27.6
Long-term debt, carrying amount	$ 163.7			$ 163.7		$ 234.6
Gain on early extinguishment of debt	0	33.6	$ 0	33.6	$ 16.7
Transaction costs		9
Write off of deferred financing cost		0.4
Long-term debt, current	6.1			6.1
Subordination to credit facility, facility total	50			50
Subordination to credit facility, facility maximum net borrowing	$ 40			$ 40
Payment in Kind (PIK) Note [Member]
Repurchase of debt		$ 204.9
Debt instrument interest rate	8.00%			8.00%
Long-term debt, carrying amount						$ 234.6
Senior Notes [Member]
Debt instrument interest rate	8.25%			8.25%
Long-term debt, face amount	$ 74.3			$ 74.3
Long-term debt, carrying amount	$ 132.4			$ 132.4

Fair Value Measurements (Financ

Fair Value Measurements (Financial Instruments Recorded at Fair Value) (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Cash and cash equivalents	$ 135.9	$ 260.7
Deferred compensation asset	1.3	1.1
Deferred compensation obligation	1.3	1.1
Level 1 [Member]
Deferred compensation asset	1.3	1.1
Deferred compensation obligation	$ 1.3	$ 1.1

Fair Value Measurements (Narrat

Fair Value Measurements (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Senior Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, carrying value	$ 138.5
Long-term debt, fair value	59.7
Long-term debt, face amount	74.3
Payment in Kind (PIK) Note [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, carrying value	31.3	$ 234.6
Long-term debt, fair value	$ 24	$ 107.4

Pension and Postretirement He47

Pension and Postretirement Health and Life Benefits (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Jun. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2015
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate			3.70%			4.50%
Pension Plan, Defined Benefit [Member]
Defined Benefit Plan, Actuarial Loss From Remeasurement	$ 0	$ 0		$ 0	$ (0.8)
Selling, General and Administrative Expenses [Member]
Defined Benefit Plan, Actuarial Loss From Remeasurement			$ 0.8

Pension and Postretirement He48

Pension and Postretirement Health and Life Benefits (Schedule of Net Benefit Costs) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Pension Plan, Defined Benefit [Member]
Service costs	$ 0.9	$ 1	$ 2.8	$ 2.9
Interest costs	8	8.9	24.1	26.6
Expected return on plan assets (gains)	(10.1)	(10.6)	(30.5)	(31.6)
Actuarial loss from remeasurement	0	0	0	0.8
Net periodic benefit cost (credit)	(1.2)	(0.7)	(3.6)	(1.3)
Postretirement Health and Life Benefits Plans [Member]
Interest costs	1.8	2.1	5.4	6.1
Expected return on plan assets (gains)	0	(0.1)	0	(0.2)
Amortization of prior service costs (credits), net	0	(0.1)	(0.1)	(0.2)
Net periodic benefit cost (credit)	$ 1.8	$ 1.9	$ 5.3	$ 5.7

Net Income Per Share (Schedule

Net Income Per Share (Schedule of Income Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Per Share Calculation [Line Items]
Net income (loss) allocable to common stockholders	$ (10.5)	$ (41.3)	$ (28.3)	$ (58.8)
Weighted average number of shares outstanding, basic	9,103	9,096	9,081	9,102
Weighted average number of shares outstanding, diluted	9,103	9,096	9,081	9,102
Net loss per share - basic and diluted	$ (1.15)	$ (4.54)	$ (3.12)	$ (6.46)
Antidilutive securities excluded from computation of earnings per share	13	14	60	7
Options with exercise price greater than market price	327	375	30	490

Stockholders' Equity (Tables) (

Stockholders' Equity (Tables) (Details) - shares	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Class of Stock [Line Items]
Preferred Stock, Shares Issued	104,574
Preferred Stock, Shares Outstanding	104,574
Common Class A [Member]
Class of Stock [Line Items]
Common Stock, Shares, Outstanding	7,632,669	7,563,600	7,563,600	7,563,600
Stock Issued During Period, Shares, New Issues	38,751
Conversion of Stock, Shares Converted	30,318
Common Stock, Shares, Issued	7,632,669	7,563,600
Common Class B [Member]
Class of Stock [Line Items]
Common Stock, Shares, Outstanding	1,406,082	1,436,400	1,436,400	1,436,400
Conversion of Stock, Shares Converted	(30,318)
Common Stock, Shares, Issued	1,406,082	1,436,400

Stockholders' Equity Stockholde

Stockholders' Equity Stockholders' Equity (Narrative) (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Dec. 31, 2016
Class of Stock [Line Items]
Preferred Stock, Shares Issued	104,574	104,574
Preferred Stock, Par Value Per Share	$ 1	$ 1	$ 1
Preferred Stock, Liquidation Preference Per Share	$ 1,000	$ 1,000
Operating Loss Carryforwards			$ 725,800,000
Common Stock Ownership Enabling Preferred Stock Purchase Rights	4.99%	4.99%
Common Stock Ownership Enabling Preferred Stock Purchase Rights, Incremental	0.50%	0.50%
Preferred Series B [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Issued	104,574	104,574
Preferred Stock, Par Value Per Share	$ 1	$ 1
Preferred Stock, Liquidation Preference Per Share	$ 1,000	$ 1,000
Preferred stock	$ 4,600,000	$ 4,600,000	$ 0
Preferred Stock, Dividend Rate, Percentage		7.50%
Preferred stock dividend condition - minimum pension funding	90.00%	90.00%
Preferred stock dividend condition - minimum net income preceding quarter		$ 7,500,000
Preferred stock dividend condition - minimum free cash flow preceding four quarters		35,000,000
Preferred stock dividend condition - minimum cash balance preceding quarter	$ 150,000,000	150,000,000
Preferred Stock, Liquidation Preference, Value	109,600,000	109,600,000
Preferred Stock, Cumulative Undeclared Dividend	$ 5,000,000	$ 5,000,000
Restricted Stock Units (RSUs) [Member]
Class of Stock [Line Items]
Share-based Compensation, Non-Option Equity Instruments, Granted	5,000	30,000

Commitment and Contingencies (D

Commitment and Contingencies (Details) $ in Millions	Sep. 30, 2017USD ($)
Decontamination and decommissioning obligations	$ 16.6
D&D financial assurance	$ 29.6

Stock-Based Compensation (Narra

Stock-Based Compensation (Narrative) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2017USD ($)
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 0.5
Weighted-average period in years of costs to be recognized	1 year 2 months 10 days
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	10 years
Employee Stock Option [Member]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 0.4
Restricted Stock Units (RSUs) [Member]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 0.1

Stock-Based Compensation (Stock

Stock-Based Compensation (Stock-Based Compensation Costs) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Share-based Compensation [Abstract]
Restricted Stock or Unit Expense				$ 0.1
Stock or Unit Option Plan Expense	$ 0.1	$ 0.1	$ 0.3	0.3
Allocated Share-based Compensation Expense	$ 0.1	$ 0.1	$ 0.3	$ 0.4

Stock-Based Compensation Stock-

Stock-Based Compensation Stock-Based Compensation (Assumptions Used in the Black-Scholes Option Pricing Model) (Details)	9 Months Ended
	Sep. 30, 2016$ / sharesshares
Share-based Compensation [Abstract]
Share-based Goods and Nonemployee Services Transaction, Valuation Method, Risk Free Interest Rate	1.90%
Share-based Goods and Nonemployee Services Transaction, Valuation Method, Expected Volatility Rate	75.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term, Simplified Method	6
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares	$ 1.77
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | shares	15

Segment Information (Segment Re

Segment Information (Segment Reporting Information) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenues [Abstract]
Revenue, Contract Services	$ 6.8	$ 7.3	$ 19.3	$ 32.2
Total Revenue	50.3	21.4	101.5	174.8
Gross Profit	11.6	(2.1)	4.8	19.2
Low Enriched Uranium Segment [Member]
Revenues [Abstract]
Revenue, Goods	43.5	14.1	82.2	142.6
Gross Profit	11.1	(1.8)	5.4	11.9
Contract Services Segment [Member]
Revenues [Abstract]
Gross Profit	0.5	(0.3)	(0.6)	7.3
Separative Work Units [Member]
Revenues [Abstract]
Revenue, Goods	43.5	14.1	82.2	128.3
Uranium [Member]
Revenues [Abstract]
Revenue, Goods	$ 0	$ 0	$ 0	$ 14.3