Centrus Energy (LEU) 10-Q 12 Aug 19 2019 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2019	Aug. 01, 2019
Document and Entity Information
Entity Registrant Name	CENTRUS ENERGY CORP
Entity Central Index Key	0001065059
Current Fiscal Year End Date	--12-31
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2019
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		9,457,389
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Current Reporting Status	Yes

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Current Assets
Cash and cash equivalents	$ 88.3	$ 123.1
Accounts receivable, net	30.2	60.2
Inventories	141.7	129.7
Deferred costs associated with deferred revenue	138.7	134.9
Deposits for financial assurance	18	30.3
Other current assets	7.4	6.3
Total current assets	424.3	484.5
Property, Plant and Equipment, Net	3.9	4.2
Deposits for surety bonds	5.7	6.3
Intangible assets	73.7	76
Other long-term assets	7.7	0.7
Total Assets	515.3	571.7
Current Liabilities
Accounts payable and accrued liabilities	37.9	52.4
Payables under SWU purchase agreements	14.9	46
Inventories owed to customers and suppliers	59	103
Deferred revenue and advances from customers	267.2	204.5
Current debt	33.6	32.8
Total current liabilities	412.6	438.7
Long-term debt	117.1	120.2
Postretirement health and life benefit obligations	132.6	136.2
Pension benefit liabilities	161.5	168.9
Advances from customers	29.4	15
Other long-term liabilities	20.4	14.6
Total liabilities	873.6	893.6
Commitments and contingencies (Note 11)
Stockholders' Deficit
Excess of capital over par value	61.3	61.2
Accumulated deficit	(425)	(388.5)
Accumulated other comprehensive income (loss), net of tax	(0.1)	(0.1)
Total stockholders' deficit	(358.3)	(321.9)
Total Liabilities and Stockholders’ Equity (Deficit)	515.3	571.7
Preferred Series B [Member]
Stockholders' Deficit
Preferred stock	4.6	4.6
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 ($)	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Preferred Stock, Par Value Per Share	$ 1	$ 1
Preferred Stock, Shares Authorized	20,000,000	20,000,000
Accumulated Depreciation, Property, Plant, and Equipment	$ 1,900,000	$ 1,600,000
Preferred Series B [Member]
Preferred Stock, Dividend Rate, Percentage	7.50%
Preferred Stock, Shares Issued	104,574	104,574
Preferred Stock, Liquidation Preference, Value	$ 119,300,000	$ 111,500,000
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	8,051,307	7,632,669
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	1,406,082

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue from Contract with Customer, Excluding Assessed Tax	$ 10.6	$ 39.4	$ 49.3	$ 75.1
Revenue	10.6	39.4	49.3	75.1
Cost of sales	14.9	50.1	59.1	91.1
Gross profit (loss)	(4.3)	(10.7)	(9.8)	(16)
Advanced technology license and decommissioning costs	5.1	5.4	11.7	13.4
Selling, general and administrative	7.7	9.7	15.8	20.9
Amortization of intangible assets	1.2	1.5	2.3	2.8
Special charges for workforce reductions and advisory costs	(2.9)	0.3	(3)	0.9
Other (income)	(0.1)	(0.2)	(0.5)	(0.3)
Operating (loss)	(15.3)	(27.4)	(36.1)	(53.7)
Nonoperating components of net periodic benefit expense (income)	0	(1.7)	(0.1)	(3.3)
Interest expense	1	1	2	2
Investment income	(0.7)	(0.6)	(1.4)	(1.2)
Income (loss) before income taxes	(15.6)	(26.1)	(36.6)	(51.2)
Provision (benefit) for income taxes	0	0	(0.1)	(0.1)
Net income (loss)	(15.6)	(26.1)	(36.5)	(51.1)
Preferred stock dividends, undeclared and cumulative	2	2	4	4
Net income (loss) allocable to common stockholders	$ (17.6)	$ (28.1)	$ (40.5)	$ (55.1)
Net loss per share - basic and diluted	$ (1.84)	$ (3.08)	$ (4.24)	$ (6.05)
Weighted-average number of shares outstanding:
Average number of common shares outstanding, basic and diluted	9,565	9,118	9,549	9,111
Weighted Average Number of Shares Outstanding, Diluted	9,565	9,118	9,549	9,111
Separative Work Units [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 0	$ 32.9	$ 12.4	$ 50.6
Uranium [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	2.6	0	25.3	3.6
Product [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	2.6	32.9	37.7	54.2
Cost of sales	7.7	42.9	46	77.7
Service [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	8	6.5	11.6	20.9
Cost of sales	$ 7.2	$ 7.2	$ 13.1	$ 13.4

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash Flows from Operating Activities
Net income (loss)	$ (36,500,000)	$ (51,100,000)
Adjustments to reconcile net income (loss) to net cash (used in) operating activities:
Depreciation and amortization	2,600,000	3,300,000
Interest on paid-in-kind toggle notes	700,000	900,000
Gain on sale of assets	(500,000)	(300,000)
Inventory valuation adjustments	2,300,000	0
Changes in operating assets and liabilities:
Accounts receivable – (increase) decrease	24,600,000	32,100,000
Inventories, net – (increase) decrease	(6,600,000)	20,400,000
Payables under SWU purchase agreements – increase (decrease)	(31,100,000)	(59,900,000)
Deferred revenue, net of deferred costs – increase (decrease)	27,000,000	9,800,000
Accounts payable and other liabilities – increase (decrease)	(15,800,000)	(12,500,000)
Pension and postretirement liabilities - increase (decrease)	(11,100,000)	(9,000,000)
Other, net	(700,000)	600,000
Net Cash (Used in) Operating Activities	(45,100,000)	(65,700,000)
Cash Flows Provided by Investing Activities
Capital expenditures	0	(100,000)
Proceeds from sales of assets	500,000	300,000
Net Cash Provided by (Used in) Investing Activities	500,000	200,000
Cash Flows Used in Financing Activities
Payment of interest classified as debt	(3,100,000)	(3,000,000)
Net Cash (Used in) Financing Activities	(3,100,000)	(3,000,000)
Decrease in cash, cash equivalents and restricted cash	(47,700,000)	(68,500,000)
Cash, cash equivalents and restricted cash, start of period	159,700,000	244,800,000
Cash, cash equivalents and restricted cash, end of period	112,000,000	176,300,000
Supplemental Cash Flow Information:
Interest paid	400,000	400,000
Conversion of interest payable-in-kind to long-term debt	$ 700,000	$ 900,000

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' DEFICIT - 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, 2017	$ (218.9)	$ 4.6		$ 0.8	$ 0.1	$ 60	$ (284.5)	$ 0.1
Adoption of ASC 606 as of January 1, 2018	0.1						0.1
Net income (loss)	(25)						(25)
Restricted and other common stock issued, net of amortization	0.1					0.1
Ending Balance at Mar. 31, 2018	(243.7)	4.6		0.8	0.1	60.1	(309.4)	0.1
Beginning Balance at Dec. 31, 2017	(218.9)	4.6		0.8	0.1	60	(284.5)	0.1
Net income (loss)	(51.1)
Ending Balance at Jun. 30, 2018	(269.8)	4.6		0.8	0.1	60.2	(335.5)	0
Beginning Balance at Mar. 31, 2018	(243.7)	4.6		0.8	0.1	60.1	(309.4)	0.1
Adoption of ASC 606 as of January 1, 2018	(26.1)						(26.1)
Net income (loss)	(26.1)
Other comprehensive income, net of tax	(0.1)							(0.1)
Ending Balance at Jun. 30, 2018	(269.8)	4.6		0.8	0.1	60.2	(335.5)	0
Beginning Balance at Dec. 31, 2018	(321.9)	4.6		0.8	0.1	61.2	(388.5)	(0.1)
Net income (loss)	(20.9)						(20.9)
Restricted and other common stock issued, net of amortization	0.1					0.1
Ending Balance at Mar. 31, 2019	(342.7)		$ 4.6	0.8	0.1	61.3	(409.4)	(0.1)
Beginning Balance at Dec. 31, 2018	(321.9)	$ 4.6		0.8	0.1	61.2	(388.5)	(0.1)
Net income (loss)	(36.5)
Ending Balance at Jun. 30, 2019	(358.3)		4.6	0.8	0.1	61.3	(425)	(0.1)
Beginning Balance at Mar. 31, 2019	(342.7)		4.6	0.8	0.1	61.3	(409.4)	(0.1)
Net income (loss)	(15.6)
Ending Balance at Jun. 30, 2019	$ (358.3)		$ 4.6	$ 0.8	$ 0.1	$ 61.3	$ (425)	$ (0.1)

Basis of Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	BASIS OF PRESENTATION Basis of Presentation and Principles of Consolidation 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, and its other subsidiaries, as of June 30, 2019, and for the three and six months ended June 30, 2019 and 2018, 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, 2018, was derived from audited consolidated financial statements, but does not include all disclosures required by generally accepted accounting principles in the United States (“GAAP”). In the opinion of management, the unaudited condensed consolidated financial statements reflect all adjustments, including normal recurring adjustments, necessary for a fair statement of the financial results for the interim period. Certain prior year amounts have been reclassified for consistency with the current year presentation. 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. The Company’s components of comprehensive income for the three and six months ended June 30, 2019 and 2018 are insignificant. Operating results for the three and six months ended June 30, 2019, are not necessarily indicative of the results that may be expected for the year ending December 31, 2019. 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, 2018. New Accounting Standards Recently Adopted Accounting Standards In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-02, Leases (Topic 842) (“Topic 842”) , which requires lessees to recognize a right-of-use asset and lease liability on the balance sheet for all leases with a term longer than 12 months. The Company adopted this standard on January 1, 2019, using the modified transition method which provides for recognition of existing leases as of the adoption date without requiring comparable presentation for the prior period. Lease assets and liabilities are recognized based on the present value of lease payments over the lease term. The Company’s leases do not provide an implicit interest rate. The Company uses an estimated incremental borrowing rate based on the term of the lease using information available at the adoption date or the lease commencement, if later, including the yield on the Company’s collateralized debt. The Company has elected to adopt the package of practical expedients provided under Topic 842, which allowed the Company to not apply a reassessment of whether any existing or expired contracts contain leases, reassessment of lease classification for existing or expired leases and reassessment of initial direct costs for leases. The adoption of this standard had no impact on the Company’s consolidated statement of operations or statement of cash flows. Refer to Note 8, Leases , for additional information. In February 2018, the FASB issued ASU 2018-02, Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income . The amendments in ASU 2018-02 allow a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cut and Jobs Act of 2017 (the “Tax Act”). However, because the amendments only relate to the reclassification of the income tax effects of the Tax Act, the underlying guidance that requires that the effect of a change in tax laws or rates be included in income from continuing operations is not affected. The Company adopted the new standard effective January 1, 2019, and elected not to reclassify the stranded tax effect resulting from the 2017 Tax Act to retained earnings. Accounting Standards Effective in Future Periods In August 2018, the FASB issued ASU 2018-14, Compensation - Retirement Benefits - Defined Benefit Plans - General (Subtopic 715-20), which modifies the disclosure requirements for employers that sponsor defined benefit pension plans and other postretirement plans. ASU 2018-14 is effective for public companies for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. The standard is to be applied on a retrospective basis to all periods presented and early adoption is permitted. The Company is evaluating the effect that the provisions of ASU 2018-14 will have on its consolidated financial statements. Significant Accounting Policies The accounting policies of the Company are set forth in Note 1 to the Consolidated Financial Statements contained in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018. Updates to those policies as a result of the adoption of ASC 842 have been included in Note 8, Leases .

Revenue and Contracts with Cust

Revenue and Contracts with Customers	6 Months Ended
	Jun. 30, 2019
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer	REVENUE AND CONTRACTS WITH CUSTOMERS Disaggregation of Revenue The following table presents revenue from separative work units (“SWU”) and uranium sales disaggregated by geographical region based on the billing addresses of customers (in millions): Three Months Ended Six Months Ended 2019 2018 2019 2018 United States $ 2.6 $ 32.9 $ 37.7 $ 54.0 Foreign — — — 0.2 Revenue - SWU and uranium $ 2.6 $ 32.9 $ 37.7 $ 54.2 Refer to Note 13, Segment Information, for disaggregation of revenue by segment. Disaggregation by end-market is provided in Note 13 and the condensed consolidated statements of operations. SWU and uranium sales are made primarily to electric utility customers. Contract services revenue resulted primarily from services provided to government contractors and, in the first quarter of 2018, the settlement with DOE and the U.S. government. SWU and uranium revenue is recognized at point of sale and contract services revenue is generally recognized over time. Contract Balances The following table represents changes in contract assets and contract liabilities balances (in millions): June 30, 2019 December 31, 2018 Year-To-Date Change Contract assets Accounts receivable: Billed $ 20.1 $ 50.4 $ (30.3 ) Unbilled 5.6 — 5.6 Uranium feed receivable 4.5 9.8 (5.3 ) Accounts receivable $ 30.2 $ 60.2 $ (30.0 ) Deferred costs associated with deferred revenue $ 138.7 $ 134.9 $ 3.8 Contract liabilities Accounts payable and accrued liabilities $ 0.5 $ — $ 0.5 Deferred revenue - current $ 220.5 $ 204.5 $ 16.0 Advances from customers - current $ 46.7 $ — $ 46.7 Advances from customers - noncurrent $ 29.4 $ 15.0 $ 14.4 Deferred cost and deferred revenue activity in the six months ended June 30, 2019, follows (in millions): Deferred Sales in the Period Previously Deferred Sales Recognized in the Period Year-To-Date Change Deferred costs associated with deferred revenue $ 3.8 $ — $ 3.8 Deferred revenue 16.0 — 16.0 LEU Segment Under the terms of certain contracts with customers in the low-enriched uranium (“LEU”) segment, the Company will accept payment in the form of uranium. Revenue from the sale of SWU under such contracts is recognized at the time LEU is delivered and is based on the fair value of the uranium at contract inception, or as the quantity of uranium is finalized, if variable. In the three months ended June 30, 2019, the Company received uranium from customers valued at $61.1 million as advance payments for the future sales of SWU. The advance payments are included in either Advances from Customers, Current or Advances from Customers, Noncurrent, based on the anticipated SWU sales period. In the three months ended June 30, 2018, the Company received uranium from customers valued at $14.5 million as advance payments for the future sales of SWU. The advance payments are included in Advances from Customers, Noncurrent, based on the anticipated SWU sales period. In the three months ended December 2018, the Company borrowed SWU inventory valued at $7.3 million from a customer under terms that require repayment within 48 months. The Company recorded the SWU and the related liability for the borrowing using an average purchase price over the borrowing period. The liability to the customer is included in Other Liabilities, which is included in noncurrent liabilities. Contract Services Segment Revenue for the contract services segment, representing the Company’s technical, manufacturing, engineering and operations services offered to public and private sector customers, is recognized over the contractual period as services are rendered. On May 31, 2019, the Company entered in a letter agreement with DOE (“the HALEU Letter Agreement”) for the Company to demonstrate the ability to produce high assay, low-enriched uranium (“HALEU”) with existing United States origin enrichment technology and provide DOE with HALEU for near term use in its research and development for the advancement of civilian nuclear energy and security, and other programmatic missions. HALEU is an advanced nuclear reactor fuel that is not commercially available today. The Company commenced work pursuant to the letter agreement on June 1, 2019, and will work with DOE to enter into a definitive contract by October 31, 2019. According to the letter agreement, the definitive contract is anticipated to be an incrementally funded, cost reimbursable contract with DOE reimbursing up to 80% of costs and the Company incurring 20% of costs. Allocable costs include project costs, classified as Cost of Sales, and an allocation of corporate costs classified as Selling, General and Administrative Expenses . It is anticipated that the definitive contract will run through May 31, 2022, and the total amount of DOE’s share will be capped at $115 million. However, the Company has no assurance that a definitive contract will be executed. Based upon the anticipated cost share described above, and the total amount of DOE’s share of $115 million , the Company’s cost share would be approximately $29 million . Any costs incurred above these amounts would be borne by the Company. The HALEU Letter Agreement obligates DOE for costs up to $18.6 million of the $115 million and currently authorizes up to $6.4 million in payments to the Company. Services to be provided over the anticipated three-year contract involve constructing and assembling centrifuge machines and related infrastructure in a cascade formation. When estimates of total project costs to be incurred for such an integrated, construction-type contract exceed estimates of total revenue to be earned, a provision for the entire loss on the contract is recorded to Cost of Sales in the period the loss is determined, and is reflected in Current Liabilities . For the quarter ended June 30, 2019, the Company recorded a loss provision of $0.5 million which represents the anticipated gross loss for the remaining initial phase of contract work performed under the HALEU Letter Agreement as the parties work to enter into a definitive contract. On January 11, 2018, the Company entered into a settlement agreement with DOE and the U.S. government regarding breach of contract claims brought by the Company relating to work performed by the Company under contracts with DOE and subcontracts with DOE contractors. In connection with the settlement, the Company (a) received $4.7 million from the U.S. government, (b) applied approximately $19.3 million of advances from the U.S. government received in prior years against the receivables balance, and (c) recorded additional revenue of $9.5 million . Centrus and DOE have yet to fully settle the Company’s claims for reimbursements for certain pension and postretirement benefits costs related to past contract work performed for DOE. There is the potential for additional revenue to be recognized for this work pending the outcome of legal proceedings related to the Company’s claims for payment and the potential release of previously established valuation allowances on receivables. As a result of the application of fresh start accounting following the Company’s emergence from Chapter 11 bankruptcy on September 30, 2014, the receivables related to the Company’s claims for payment are carried at fair value as of September 30, 2014, which is net of the valuation allowances. Refer to Note 12, Commitments and Contingencies . LEU Segment Order Book The SWU component of LEU is typically bought and sold under long-term contracts with deliveries over several years. The Company’s agreements for natural uranium sales are generally shorter-term, fixed-commitment contracts. The Company’s order book sales under contract in the LEU segment (“order book”) extends to 2030. The order book represents the Company’s remaining performance obligations under these contracts and includes the Deferred Revenue and Advances from Customers amounts in the Contract Balances table above. As of June 30, 2019, the order book was $1.1 billion , compared to $1.0 billion at December 31, 2018, reflecting completed deliveries and new contracts signed in the six months ended June 30, 2019. Most of the Company’s contracts provide for fixed purchases of SWU during a given year. T he Company’s estimate of the aggregate dollar amount of future SWU and uranium sales is partially based on customers’ estimates of the timing and size of their fuel requirements and other assumptions that are subject to change. For example, depending on the terms of specific contracts, the customer may be able to increase or decrease the quantity delivered within an agreed range. T he Company’s order book estimate is also based on the Company’s estimates of selling prices, which are subject to change. For example, depending on the terms of specific contracts, prices may be adjusted based on escalation using a general inflation index, published SWU price indicators prevailing at the time of delivery, and other factors, all of which are variable. T he Company uses external composite forecasts of future market prices and inflation rates in its pricing estimates.

Special Charges

Special Charges	6 Months Ended
	Jun. 30, 2019
Restructuring and Related Activities [Abstract]
Special Charges	SPECIAL CHARGES As a result of the HALEU Letter Agreement, special charges in the three and six months ended June 30, 2019, included a credit of $2.9 million for the reversal of accrued termination benefits for employees who were retained at the Company’s facility in Piketon, Ohio. For the six months ended June 30, 2018, special charges totaled $0.9 million , consisting of estimated employee termination benefits related to corporate functions of $0.8 million and advisory costs related to updating the Company’s information technology systems of $0.1 million . The remaining balance of termination benefits of $0.6 million is expected to be paid within twelve months and is classified in Accounts Payable and Accrued Liabilities in the condensed consolidated balance sheet. A summary of termination benefit activity an d the accrued liability follows (in millions): Liability December 31, 2018 Six Months Ended Liability 2019 Charges (Credits) for Termination Benefits Paid/ Settled Workforce reductions: Corporate functions $ 0.9 $ — $ (0.7 ) $ 0.2 Piketon facility 3.2 (2.9 ) 0.1 0.4 Total $ 4.1 $ (2.9 ) $ (0.6 ) $ 0.6

Cash, Cash Equivalents and Rest

Cash, Cash Equivalents and Restricted Cash	6 Months Ended
	Jun. 30, 2019
Cash, Cash Equivalents and Restricted Cash [Abstract]
Cash and Cash Equivalents Disclosure	CASH, CASH EQUIVALENTS AND RESTRICTED CASH The following table summarizes the Company’s cash, cash equivalents and restricted cash as presented on the condensed consolidated balance sheet to amounts on the condensed consolidated statement of cash flows (in millions): June 30, 2019 December 31, 2018 Cash and cash equivalents $ 88.3 $ 123.1 Deposits for financial assurance - current 18.0 30.3 Deposits for financial assurance - noncurrent 5.7 6.3 Total cash, cash equivalents and restricted cash $ 112.0 $ 159.7 The following table provides additional detail regarding the Company’s deposits for financial assurance (in millions): June 30, 2019 December 31, 2018 Current Long-Term Current Long-Term NRC license $ 16.9 $ — $ 16.6 $ — DOE lease — — 13.5 — Workers compensation 0.6 5.4 — 6.0 Other 0.5 0.3 0.2 0.3 Total deposits for financial assurance $ 18.0 $ 5.7 $ 30.3 $ 6.3 Piketon Facility Obligations and Surety Bonds Centrus leases gas centrifuge enrichment plant facilities and related personal property in Piketon, Ohio from DOE. Centrus previously provided financial assurance to DOE for lease turnover obligations in the form of surety bonds that were fully cash collateralized. On May 31, 2019, DOE and Centrus amended the lease agreement, which was scheduled to expire by its terms on June 30, 2019. In the second quarter of 2019, Centrus completed its lease turnover obligations related to the term ended June 30, 2019. DOE released the bonds and Centrus received the cash collateral of $13.5 million . In addition, Centrus has previously provided financial assurance to the U.S. Nuclear Regulatory Commission (“NRC”) for the decontamination and decommissioning (“D&D”) of the facility in the form of surety bonds that are fully cash collateralized by Centrus for $16.9 million . The Company has completed the D&D work required for elimination of financial assurance under NRC license requirements and is working with the NRC to have the surety bonds cancelled, which would permit the Company to receive the cash collateral. Financial Assurance for Workers’ Compensation The Company has provided financial assurance to states in which it was previously self-insured for workers’ compensation in accordance with each state’s requirements in the form of a surety bond and a letter of credit that are fully cash collateralized by Centrus. When each state determines that Centrus is likely to have no further workers’ compensation obligations related to the period of self-insurance, the surety bond and letter of credit will be cancelled and the Company expects to receive the cash collateral. Of the $6.0 million in cash collateral as of June 30, 2019, $0.6 million relates to a letter of credit that is cancelling within 12 months.

Inventories

Inventories	6 Months Ended
	Jun. 30, 2019
Inventory, Net [Abstract]
Inventories	INVENTORIES Centrus holds uranium at licensed locations in the form of natural uranium and as the uranium component of LEU. Centrus also holds 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 are as follows (in millions): June 30, 2019 December 31, 2018 Current Assets Current Liabilities (a) Inventories, Net Current Assets Current Liabilities (a) Inventories, Net Separative work units $ 18.4 $ 0.5 $ 17.9 $ 20.1 $ 3.6 $ 16.5 Uranium 123.3 58.5 64.8 109.6 99.4 10.2 Total $ 141.7 $ 59.0 $ 82.7 $ 129.7 $ 103.0 $ 26.7 (a) Inventories owed to customers and suppliers, included in current liabilities, include SWU and uranium inventories owed to fabricators. Inventories are valued at the lower of cost or net realizable value. Valuation adjustments for uranium inventory to reflect declines in uranium market price indicators totaled $2.3 million in the six months ended June 30, 2019, including $2.0 million in the second quarter of 2019.

Intangible Assets

Intangible Assets	6 Months Ended
	Jun. 30, 2019
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 consolidated statements of operations. Intangible asset balances are as follows (in millions): June 30, 2019 December 31, 2018 Gross Carrying Amount Accumulated Amortization Net Amount Gross Carrying Amount Accumulated Amortization Net Amount Sales order book $ 54.6 $ 28.0 $ 26.6 $ 54.6 $ 28.0 $ 26.6 Customer relationships 68.9 21.8 47.1 68.9 19.5 49.4 Total $ 123.5 $ 49.8 $ 73.7 $ 123.5 $ 47.5 $ 76.0

Debt

Debt	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Debt	DEBT A summary of debt is as follows (in millions): June 30, 2019 December 31, 2018 Maturity Current Long-Term Current Long-Term 8.25% Notes: Feb. 2027 Principal $ — $ 74.3 $ — $ 74.3 Interest 6.1 42.8 6.1 45.9 8.25% Notes $ 6.1 $ 117.1 $ 6.1 $ 120.2 8% PIK Toggle Notes Sep. 2019 (a) $ 27.5 $ — $ 26.7 $ — Less deferred issuance costs — — — — 8% PIK Toggle Notes $ 27.5 $ — $ 26.7 $ — Total $ 33.6 $ 117.1 $ 32.8 $ 120.2 (a) Maturity can be extended to September 2024 upon the satisfaction of certain funding conditions described in the applicable indenture. 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 June 30, 2019, and December 31, 2018, $6.1 million of interest is recorded as current and classified as Current Debt in the condensed consolidated balance sheet. 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 in-kind PIK payments. For the semi-annual interest periods in 2018 and 2019, 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. Additional terms and conditions of the 8.25% Notes and the 8% PIK Toggle Notes are described in Note 9, Debt , of the audited consolidated financial statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018.

Leases

Leases	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Lessee, Operating Leases [Text Block]	LEASES Centrus leases facilities and equipment under operating leases. Lease expense for operating leases is recognized on a straight-line basis over the lease term. The Company has facility leases with terms greater than 12 months, and the Company records the related asset and obligation at the present value of lease payments over the term. Leases with an initial term of 12 months or less are not recorded on the balance sheet. Refer to Note 1, Basis of Presentation , for information regarding the Company’s adoption of Topic 842 on January 1, 2019. Lease assets represent the right to use an underlying asset for the lease term, and lease liabilities represent the obligation to make lease payments arising from the lease. Lease assets exclude lease incentives. Lease terms reflect options to extend or terminate the lease when it is reasonably certain that those options will be exercised. The depreciable life of lease assets and leasehold improvements is limited by the expected lease term. The weighted-average remaining lease term was 3.9 years at June 30, 2019, with maturity dates ranging from June 2019 to September 2027, and the weighted-average discount rate was 12.1% . Lease expense amounted to $0.3 million in the three months ended June 30, 2019 and $0.9 million in the three months ended June 30, 2018. Expense for the three months ended June 30, 2019 was primarily related to operating leases and includes a $0.5 million credit from DOE for true up of prior year lease expense. Other amounts related to short-term lease expense were insignificant. Operating lease expense is included in Cost of Sales, Selling, General and Administrative Expenses and Advance Technology Costs on the Statement of Operations. Cash paid for amounts included in operating cash flows for operating leases was $0.8 million in the six months ended June 30, 2019. The Company leases gas centrifuge enrichment plant facilities and related personal property in Piketon, Ohio from DOE. On May 31, 2019, in connection with the HALEU Letter Agreement, DOE and the Company amended the lease agreement, which was scheduled to expire by its terms on June 30, 2019. The lease was renewed and extended until May 31, 2022, provided, however, that DOE has the right to terminate the lease if the parties do not enter into a definitive contract as contemplated by the HALEU Letter Agreement. Any facilities or equipment constructed or installed under contract with DOE will be owned by DOE, may be returned to DOE in an “as is” condition at the end of the lease term, and DOE would be responsible for its decontamination and decommissioning. The Company accounted for the amendment as a modification and reassessed its classification. The Company classified the lease as an operating lease as the lease does not contain a transfer of ownership or purchase option, the fair value of the underlying asset cannot be practicably determined and the economic life of the asset is indeterminate. The remeasurement of the remaining consideration resulted in $2.9 million of additional lease assets and liabilities related to the modification. The modification resulted in an insignificant impact on the consolidated statement of operations. Operating Lease Assets and Liabilities The table below presents the lease-related assets and liabilities recorded on the balance sheet (in millions). June 30, 2019 Classification on the Balance Sheet Lease assets $ 7.3 Other long-term assets Lease liabilities: Current 2.4 Accounts payable and accrued liabilities Noncurrent 7.3 Other long-term liabilities Total lease liabilities $ 9.7 Maturity of Operating Lease Liabilities The table below reconciles undiscounted payments for operating leases with terms greater than 12 months to the operating lease liabilities recorded on the balance sheet (in millions). Remainder of 2019 $ 1.8 2020 2.6 2021 2.6 2022 1.7 2023 1.0 Thereafter 3.8 Total lease payments 13.5 Less imputed interest 3.8 Present value of lease payments $ 9.7 Minimum Lease Payments Prior to the adoption of Topic 842, future estimated minimum lease payments as of December 31, 2018 for leases with remaining terms in excess of one year were as follows (in millions): 2019 $ 0.9 2020 0.9 2021 0.9 2022 1.0 2023 1.0 Thereafter 3.8 $ 8.5

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2019
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): June 30, 2019 December 31, 2018 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets: Cash and cash equivalents $ 88.3 $ — $ — $ 88.3 $ 123.1 $ — $ — $ 123.1 Deferred compensation asset (a) 1.7 — — 1.7 1.4 — — 1.4 Liabilities: Deferred compensation obligation (a) $ 1.7 $ — $ — $ 1.7 $ 1.4 $ — $ — $ 1.4 (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 June 30, 2019 , and December 31, 2018, 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 their short-term nature. The carrying value and estimated fair value of long-term debt are as follows (in millions): June 30, 2019 December 31, 2018 Carrying Value Estimated Fair Value (a) Carrying Value Estimated Fair Value (a) 8.25% Notes $ 123.2 (b) $ 61.1 $ 126.3 (b) $ 57.9 8% PIK Toggle Notes 27.5 23.4 26.7 21.8 (a) Based on recent trading prices and bid/ask quotes as of or near the balance sheet date, which are considered Level 2 inputs based on the frequency of trading. (b) The carrying value of the 8.25% Notes consists of the principal balance of $74.3 million and the sum of current and noncurrent interest payment obligations until maturity. Refer to Note 7, Debt .

Pension and Postretirement Heal

Pension and Postretirement Health and Life Benefits	6 Months Ended
	Jun. 30, 2019
Retirement Benefits, Description [Abstract]
Pension and Postretirement Health and Life Benefits	PENSION AND POSTRETIREMENT HEALTH AND LIFE BENEFITS The components of net periodic benefit (credits) for the defined benefit pension plans were as follows (in millions): Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Service costs $ 0.8 $ 0.9 $ 1.6 $ 1.7 Interest costs 7.6 7.2 15.2 14.4 Expected return on plan assets (gains) (9.1 ) (10.3 ) (18.2 ) (20.5 ) Net periodic benefit (credits) $ (0.7 ) $ (2.2 ) $ (1.4 ) $ (4.4 ) The components of net periodic benefit costs for the postretirement health and life benefit plans were as follows (in millions): Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Interest costs $ 1.5 $ 1.5 $ 3.0 $ 2.9 Amortization of prior service costs (credits), net — (0.1 ) (0.1 ) (0.1 ) Net periodic benefit costs $ 1.5 $ 1.4 $ 2.9 $ 2.8 The Company reports service costs for its defined benefit pension plans and its postretirement health and life benefit plans in Cost of Sales and Selling, General and Administrative Expenses . The remaining components of net periodic benefit (credits) costs are reported as Nonoperating Components of Net Periodic Benefit Expense (Income).

Net Income Per Share

Net Income Per Share	6 Months Ended
	Jun. 30, 2019
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. The weighted average number of common and common equivalent shares used in the calculation of basic and diluted income (loss) per common share are as follows: Three Months Ended Six Months Ended 2019 2018 2019 2018 Numerator (in millions): Net loss $ (15.6 ) $ (26.1 ) $ (36.5 ) $ (51.1 ) Preferred stock dividends - undeclared and cumulative 2.0 2.0 4.0 4.0 Net loss allocable to common stockholders $ (17.6 ) $ (28.1 ) $ (40.5 ) $ (55.1 ) Denominator (in thousands): Average common shares outstanding - basic 9,565 9,118 9,549 9,111 Potentially dilutive shares related to stock options and restricted stock units (a) — — — — Average common shares outstanding - diluted 9,565 9,118 9,549 9,111 Net loss per common share (in dollars) - basic and diluted: $ (1.84 ) $ (3.08 ) $ (4.24 ) $ (6.05 ) (a) Common stock equivalents excluded from the diluted calculation as a result of a net loss in the period (in thousands) 77 3 80 10 Options outstanding and considered anti-dilutive as their exercise price exceeded the average share market price (in thousands) 360 360 360 360

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES Commitments under SWU Purchase Agreements TENEX A major supplier of SWU to the Company is the Russian government entity Joint Stock Company “TENEX” (“TENEX”). Under a 2011 agreement with TENEX, as amended, (the “Russian Supply Agreement”), the Company purchases SWU contained in LEU received from TENEX, and the Company delivers natural uranium to TENEX for the LEU’s uranium component. The LEU that the Company obtains from TENEX under the agreement is subject to quotas and other restrictions applicable to commercial Russian LEU. The Russian Supply Agreement was originally signed with commitments through 2022 but was modified in 2015 to give the Company the right to reschedule certain quantities of SWU of the original commitments into the period 2023 and beyond, in return for the purchase of additional SWU in those years. The Company has exercised this right to reschedule in each year through December 31, 2018. If the Company exercises this right to reschedule in full during the remaining years of the contract’s original term, the Company will have a rescheduled post-2022 purchase commitment through 2028. The Russian Supply Agreement provides that the Company must pay for all SWU in its minimum purchase obligation each year, even if it fails to submit orders for such SWU. The Company would then have the right to take the unordered SWU in the following year. Pricing terms for SWU under the Russian Supply Agreement are based on a combination of market-related price points and other factors. This formula was subject to an adjustment at the end of 2018 that will reduce the unit costs of SWU under this contract for the duration of the contract. Orano On April 27, 2018, the Company entered into an agreement (the “Orano Supply Agreement”) with Orano Cycle (formerly, AREVA NC) (“Orano”) for the long-term supply to the Company of SWU contained in LEU, nominally commencing in 2023. Under the Orano Supply Agreement, the Company purchases SWU contained in LEU received from Orano, and the Company delivers natural uranium to Orano for the natural uranium feed material component of LEU. The Company may elect to begin to accept deliveries as early as 2021 or to defer the commencement of purchases until 2024 and has the option to extend the six-year purchase period for an additional two years. The Orano Supply Agreement provides significant flexibility to adjust purchase volumes, subject to annual minimums and maximums in fixed amounts that vary year by year. The pricing for the SWU purchased by the Company is determined by a formula that uses a combination of market-related price points and other factors, and is subject to certain floors and ceilings. Prices are payable in a combination of U.S. dollars and euros. 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 the Company 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 the Company 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 the Company 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 continue to be preserved, and that the time limits for each party to respond to any missed milestones continue to be tolled. Legal Matters On August 30, 2013, the Company submitted a claim to DOE under the Contract Disputes Act for payment of $42.8 million , representing DOE’s share of pension and postretirement benefits costs related to the transition of Portsmouth site employees to DOE’s D&D contractor. On August 27, 2014, the DOE contracting officer denied the Company’s claim. As a result, the Company filed an appeal of the decision in the U.S. Court of Federal Claims in January 2015. Centrus believes that DOE is responsible for a significant portion of any pension and postretirement benefit costs associated with the transition of employees at Portsmouth. The receivable for DOE’s share of pension and postretirement benefits costs has a full valuation allowance due to the lack of a resolution with DOE and uncertainty regarding the amounts owed and the timing of collection. The parties filed cross motions for partial summary judgment to seek a judicial determination of two issues related to the calculation of the pension liability and the entitlement of Centrus to reimbursement for postretirement benefit costs. The Court ruled on the pension calculation methodology and ruled Centrus was entitled to recover costs associated with postretirement benefits for employees afforded protection under the USEC Privatization Act. At the Government’s request, the Court has issued a revised scheduling order providing for fact discovery to close on August 30, 2019, expert opinions to be disclosed by October 25, 2019 and expert discovery to close on November 22, 2019. A status report is due by December 2, 2019. The Company is still pursuing settlement. On May 26, 2019, the Company, its subsidiary United States Enrichment Corp. (“Enrichment Corp.”), and five other DOE contractors who have operated facilities at the Portsmouth Gaseous Diffusion Plant (“GDP”) site were named as defendants in a class action complaint filed by Ursula McGlone, Jason McGlone, Julia Dunham, and K.D. and C.D., minor children by and through their parent and natural guardian Julia Dunham (collectively, the “Plaintiffs”) in the U.S. District Court in the Southern District of Ohio, Eastern Division. The complaint seeks damages for alleged off-site contamination allegedly resulting from activities on the Portsmouth GDP site. The Plaintiffs are seeking to represent a class of (i) all current or former residents within a 7-mile radius of the Portsmouth GDP site and (ii) all students and their parents at the Zahn’s Corner Middle School from 1993-present. The Company and Enrichment Corp. have not been served with the complaint. The Company believes that its operations at the Portsmouth GDP site and American Centrifuge Plant site were fully in compliance with the Nuclear Regulatory Commission’s regulations. Further the Company believes that any such liability should be covered by our indemnification under the Price-Anderson Act. The Company and Enrichment Corp. has provided notifications to DOE required to invoke indemnification under the Price-Anderson Act and other contractual provisions. On June 28, 2019, the Company, Enrichment Corp., and four other Department of Energy (“DOE”) contractors who have operated facilities at the Portsmouth GDP site were named as defendants in a class action complaint filed by Ray Pritchard and Sharon Melick (collectively, the “Plaintiffs”) in the U.S. District Court in the Southern District of Ohio, Eastern Division. The complaint seeks damages for alleged off-site contamination allegedly resulting from activities on the Portsmouth GDP site. The Plaintiffs are seeking to represent a class of all current or former residents within a 7-mile radius of the Portsmouth GDP site. The Company and Enrichment Corp. have not been served with the complaint. The Company believes that its operations at the Portsmouth GDP site and American Centrifuge Plant site were fully in compliance with the Nuclear Regulatory Commission’s regulations. Further the Company believes that any such liability should be covered by our indemnification under the Price-Anderson Act. The Company and Enrichment Corp. has provided notifications to DOE required to invoke indemnification under the Price-Anderson Act and other contractual provisions. Centrus is subject to various legal proceedings and claims, either asserted or unasserted, which arise in the ordinary course of business. While the outcome of these claims cannot be predicted with certainty, other than the above, Centrus does not believe that the outcome of any of these legal matters, individually and in the aggregate, will have a material adverse effect on its cash flows, results of operations or consolidated financial condition.

Segment Information

Segment Information	6 Months Ended
	Jun. 30, 2019
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Segment Information	SEGMENT INFORMATION Gross profit is Centrus’ measure for segment reporting. There were no intersegment sales in the periods presented. Refer to Note 2, Revenue and Contracts with Customers, for additional details on revenue for each segment. The following table presents the Company’s segment information (in millions): Three Months Ended Six Months Ended 2019 2018 2019 2018 Revenue LEU segment: Separative work units $ — $ 32.9 $ 12.4 $ 50.6 Uranium 2.6 — 25.3 3.6 Total 2.6 32.9 37.7 54.2 Contract services segment 8.0 6.5 11.6 20.9 Total revenue $ 10.6 $ 39.4 $ 49.3 $ 75.1 Segment Gross Profit (Loss) LEU segment $ (5.1 ) $ (10.0 ) $ (8.3 ) $ (23.5 ) Contract services segment 0.8 (0.7 ) (1.5 ) 7.5 Gross loss $ (4.3 ) $ (10.7 ) $ (9.8 ) $ (16.0 ) Revenue from Major Customers (10% or More of Total Revenue) In the three months ended June 30, 2019, one customer in the LEU segment represented $2.6 million of revenue and one customer in the contract services segment represented $6.3 million of revenue. In the six months ended June 30, 2019, one customer in the LEU segment represented $35.0 million of revenue and one customer in the contract services segment represented $8.7 million of revenue. In the three months ended June 30, 2018, individual customers in the LEU segment represented $18.6 million and $14.3 million of revenue, and one customer in the contract services segment represented $4.5 million of revenue. In the six months ended June 30, 2018, individual customers in the LEU segment represented $30.7 million and $14.4 million of revenue, and individual customers in the contract services segment represented $9.9 million and $9.2 million of revenue.

Revenue and Contracts with Cu_2

Revenue and Contracts with Customers (Tables)	6 Months Ended
	Jun. 30, 2019
Revenue from Contract with Customer [Abstract]
Revenue from External Customers by Geographic Areas	The following table presents revenue from separative work units (“SWU”) and uranium sales disaggregated by geographical region based on the billing addresses of customers (in millions): Three Months Ended Six Months Ended 2019 2018 2019 2018 United States $ 2.6 $ 32.9 $ 37.7 $ 54.0 Foreign — — — 0.2 Revenue - SWU and uranium $ 2.6 $ 32.9 $ 37.7 $ 54.2
Contract with Customer, Asset and Liability	The following table represents changes in contract assets and contract liabilities balances (in millions): June 30, 2019 December 31, 2018 Year-To-Date Change Contract assets Accounts receivable: Billed $ 20.1 $ 50.4 $ (30.3 ) Unbilled 5.6 — 5.6 Uranium feed receivable 4.5 9.8 (5.3 ) Accounts receivable $ 30.2 $ 60.2 $ (30.0 ) Deferred costs associated with deferred revenue $ 138.7 $ 134.9 $ 3.8 Contract liabilities Accounts payable and accrued liabilities $ 0.5 $ — $ 0.5 Deferred revenue - current $ 220.5 $ 204.5 $ 16.0 Advances from customers - current $ 46.7 $ — $ 46.7 Advances from customers - noncurrent $ 29.4 $ 15.0 $ 14.4

Special Charges (Tables)

Special Charges (Tables)	6 Months Ended
	Jun. 30, 2019
Restructuring and Related Activities [Abstract]
Restructuring and Related Costs	Liability December 31, 2018 Six Months Ended Liability 2019 Charges (Credits) for Termination Benefits Paid/ Settled Workforce reductions: Corporate functions $ 0.9 $ — $ (0.7 ) $ 0.2 Piketon facility 3.2 (2.9 ) 0.1 0.4 Total $ 4.1 $ (2.9 ) $ (0.6 ) $ 0.6

Cash, Cash Equivalents and Re_2

Cash, Cash Equivalents and Restricted Cash (Tables)	6 Months Ended
	Jun. 30, 2019
Cash, Cash Equivalents and Restricted Cash [Abstract]
Schedule of Cash and Cash Equivalents	The following table summarizes the Company’s cash, cash equivalents and restricted cash as presented on the condensed consolidated balance sheet to amounts on the condensed consolidated statement of cash flows (in millions): June 30, 2019 December 31, 2018 Cash and cash equivalents $ 88.3 $ 123.1 Deposits for financial assurance - current 18.0 30.3 Deposits for financial assurance - noncurrent 5.7 6.3 Total cash, cash equivalents and restricted cash $ 112.0 $ 159.7
Restrictions on Cash and Cash Equivalents	The following table provides additional detail regarding the Company’s deposits for financial assurance (in millions): June 30, 2019 December 31, 2018 Current Long-Term Current Long-Term NRC license $ 16.9 $ — $ 16.6 $ — DOE lease — — 13.5 — Workers compensation 0.6 5.4 — 6.0 Other 0.5 0.3 0.2 0.3 Total deposits for financial assurance $ 18.0 $ 5.7 $ 30.3 $ 6.3

Inventories (Tables)

Inventories (Tables)	6 Months Ended
	Jun. 30, 2019
Inventory, Net [Abstract]
Schedule of Inventories	Components of inventories are as follows (in millions): June 30, 2019 December 31, 2018 Current Assets Current Liabilities (a) Inventories, Net Current Assets Current Liabilities (a) Inventories, Net Separative work units $ 18.4 $ 0.5 $ 17.9 $ 20.1 $ 3.6 $ 16.5 Uranium 123.3 58.5 64.8 109.6 99.4 10.2 Total $ 141.7 $ 59.0 $ 82.7 $ 129.7 $ 103.0 $ 26.7 (a) Inventories owed to customers and suppliers, included in current liabilities, include SWU and uranium inventories owed to fabricators.

Intangible Assets (Tables)

Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Intangible Assets and Excess Reorganization Value [Table Text Block]	Intangible asset balances are as follows (in millions): June 30, 2019 December 31, 2018 Gross Carrying Amount Accumulated Amortization Net Amount Gross Carrying Amount Accumulated Amortization Net Amount Sales order book $ 54.6 $ 28.0 $ 26.6 $ 54.6 $ 28.0 $ 26.6 Customer relationships 68.9 21.8 47.1 68.9 19.5 49.4 Total $ 123.5 $ 49.8 $ 73.7 $ 123.5 $ 47.5 $ 76.0

Debt Schedule of Debt (Tables)

Debt Schedule of Debt (Tables)	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Schedule of Debt	A summary of debt is as follows (in millions): June 30, 2019 December 31, 2018 Maturity Current Long-Term Current Long-Term 8.25% Notes: Feb. 2027 Principal $ — $ 74.3 $ — $ 74.3 Interest 6.1 42.8 6.1 45.9 8.25% Notes $ 6.1 $ 117.1 $ 6.1 $ 120.2 8% PIK Toggle Notes Sep. 2019 (a) $ 27.5 $ — $ 26.7 $ — Less deferred issuance costs — — — — 8% PIK Toggle Notes $ 27.5 $ — $ 26.7 $ — Total $ 33.6 $ 117.1 $ 32.8 $ 120.2

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Lessee, Operating Lease, Liability, Maturity [Table Text Block]	Prior to the adoption of Topic 842, future estimated minimum lease payments as of December 31, 2018 for leases with remaining terms in excess of one year were as follows (in millions): 2019 $ 0.9 2020 0.9 2021 0.9 2022 1.0 2023 1.0 Thereafter 3.8 $ 8.5 The table below reconciles undiscounted payments for operating leases with terms greater than 12 months to the operating lease liabilities recorded on the balance sheet (in millions). Remainder of 2019 $ 1.8 2020 2.6 2021 2.6 2022 1.7 2023 1.0 Thereafter 3.8 Total lease payments 13.5 Less imputed interest 3.8 Present value of lease payments $ 9.7
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	LEASES Centrus leases facilities and equipment under operating leases. Lease expense for operating leases is recognized on a straight-line basis over the lease term. The Company has facility leases with terms greater than 12 months, and the Company records the related asset and obligation at the present value of lease payments over the term. Leases with an initial term of 12 months or less are not recorded on the balance sheet. Refer to Note 1, Basis of Presentation , for information regarding the Company’s adoption of Topic 842 on January 1, 2019. Lease assets represent the right to use an underlying asset for the lease term, and lease liabilities represent the obligation to make lease payments arising from the lease. Lease assets exclude lease incentives. Lease terms reflect options to extend or terminate the lease when it is reasonably certain that those options will be exercised. The depreciable life of lease assets and leasehold improvements is limited by the expected lease term. The weighted-average remaining lease term was 3.9 years at June 30, 2019, with maturity dates ranging from June 2019 to September 2027, and the weighted-average discount rate was 12.1% . Lease expense amounted to $0.3 million in the three months ended June 30, 2019 and $0.9 million in the three months ended June 30, 2018. Expense for the three months ended June 30, 2019 was primarily related to operating leases and includes a $0.5 million credit from DOE for true up of prior year lease expense. Other amounts related to short-term lease expense were insignificant. Operating lease expense is included in Cost of Sales, Selling, General and Administrative Expenses and Advance Technology Costs on the Statement of Operations. Cash paid for amounts included in operating cash flows for operating leases was $0.8 million in the six months ended June 30, 2019. The Company leases gas centrifuge enrichment plant facilities and related personal property in Piketon, Ohio from DOE. On May 31, 2019, in connection with the HALEU Letter Agreement, DOE and the Company amended the lease agreement, which was scheduled to expire by its terms on June 30, 2019. The lease was renewed and extended until May 31, 2022, provided, however, that DOE has the right to terminate the lease if the parties do not enter into a definitive contract as contemplated by the HALEU Letter Agreement. Any facilities or equipment constructed or installed under contract with DOE will be owned by DOE, may be returned to DOE in an “as is” condition at the end of the lease term, and DOE would be responsible for its decontamination and decommissioning. The Company accounted for the amendment as a modification and reassessed its classification. The Company classified the lease as an operating lease as the lease does not contain a transfer of ownership or purchase option, the fair value of the underlying asset cannot be practicably determined and the economic life of the asset is indeterminate. The remeasurement of the remaining consideration resulted in $2.9 million of additional lease assets and liabilities related to the modification. The modification resulted in an insignificant impact on the consolidated statement of operations. Operating Lease Assets and Liabilities The table below presents the lease-related assets and liabilities recorded on the balance sheet (in millions). June 30, 2019 Classification on the Balance Sheet Lease assets $ 7.3 Other long-term assets Lease liabilities: Current 2.4 Accounts payable and accrued liabilities Noncurrent 7.3 Other long-term liabilities Total lease liabilities $ 9.7 Maturity of Operating Lease Liabilities The table below reconciles undiscounted payments for operating leases with terms greater than 12 months to the operating lease liabilities recorded on the balance sheet (in millions). Remainder of 2019 $ 1.8 2020 2.6 2021 2.6 2022 1.7 2023 1.0 Thereafter 3.8 Total lease payments 13.5 Less imputed interest 3.8 Present value of lease payments $ 9.7 Minimum Lease Payments Prior to the adoption of Topic 842, future estimated minimum lease payments as of December 31, 2018 for leases with remaining terms in excess of one year were as follows (in millions): 2019 $ 0.9 2020 0.9 2021 0.9 2022 1.0 2023 1.0 Thereafter 3.8 $ 8.5

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Schedule of Financial Instruments Recorded at Fair Value	Financial Instruments Recorded at Fair Value (in millions): June 30, 2019 December 31, 2018 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets: Cash and cash equivalents $ 88.3 $ — $ — $ 88.3 $ 123.1 $ — $ — $ 123.1 Deferred compensation asset (a) 1.7 — — 1.7 1.4 — — 1.4 Liabilities: Deferred compensation obligation (a) $ 1.7 $ — $ — $ 1.7 $ 1.4 $ — $ — $ 1.4 (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 He_2

Pension and Postretirement Health and Life Benefits (Tables)	6 Months Ended
	Jun. 30, 2019
Defined Benefit Plan Disclosure [Line Items]
Schedule of Net Benefit Costs [Table Text Block]	The components of net periodic benefit (credits) for the defined benefit pension plans were as follows (in millions): Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Service costs $ 0.8 $ 0.9 $ 1.6 $ 1.7 Interest costs 7.6 7.2 15.2 14.4 Expected return on plan assets (gains) (9.1 ) (10.3 ) (18.2 ) (20.5 ) Net periodic benefit (credits) $ (0.7 ) $ (2.2 ) $ (1.4 ) $ (4.4 ) The components of net periodic benefit costs for the postretirement health and life benefit plans were as follows (in millions): Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Interest costs $ 1.5 $ 1.5 $ 3.0 $ 2.9 Amortization of prior service costs (credits), net — (0.1 ) (0.1 ) (0.1 ) Net periodic benefit costs $ 1.5 $ 1.4 $ 2.9 $ 2.8

Net Income Per Share (Tables)

Net Income Per Share (Tables)	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Schedule of Net Income Per Share	Three Months Ended Six Months Ended 2019 2018 2019 2018 Numerator (in millions): Net loss $ (15.6 ) $ (26.1 ) $ (36.5 ) $ (51.1 ) Preferred stock dividends - undeclared and cumulative 2.0 2.0 4.0 4.0 Net loss allocable to common stockholders $ (17.6 ) $ (28.1 ) $ (40.5 ) $ (55.1 ) Denominator (in thousands): Average common shares outstanding - basic 9,565 9,118 9,549 9,111 Potentially dilutive shares related to stock options and restricted stock units (a) — — — — Average common shares outstanding - diluted 9,565 9,118 9,549 9,111 Net loss per common share (in dollars) - basic and diluted: $ (1.84 ) $ (3.08 ) $ (4.24 ) $ (6.05 ) (a) Common stock equivalents excluded from the diluted calculation as a result of a net loss in the period (in thousands) 77 3 80 10 Options outstanding and considered anti-dilutive as their exercise price exceeded the average share market price (in thousands) 360 360 360 360

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2019
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Revenue from External Customers by Geographic Areas	The following table presents revenue from separative work units (“SWU”) and uranium sales disaggregated by geographical region based on the billing addresses of customers (in millions): Three Months Ended Six Months Ended 2019 2018 2019 2018 United States $ 2.6 $ 32.9 $ 37.7 $ 54.0 Foreign — — — 0.2 Revenue - SWU and uranium $ 2.6 $ 32.9 $ 37.7 $ 54.2
Segment Reporting Information	The following table presents the Company’s segment information (in millions): Three Months Ended Six Months Ended 2019 2018 2019 2018 Revenue LEU segment: Separative work units $ — $ 32.9 $ 12.4 $ 50.6 Uranium 2.6 — 25.3 3.6 Total 2.6 32.9 37.7 54.2 Contract services segment 8.0 6.5 11.6 20.9 Total revenue $ 10.6 $ 39.4 $ 49.3 $ 75.1 Segment Gross Profit (Loss) LEU segment $ (5.1 ) $ (10.0 ) $ (8.3 ) $ (23.5 ) Contract services segment 0.8 (0.7 ) (1.5 ) 7.5 Gross loss $ (4.3 ) $ (10.7 ) $ (9.8 ) $ (16.0 ) Revenue from Major Customers (10% or More of Total Revenue) In the three months ended June 30, 2019, one customer in the LEU segment represented $2.6 million of revenue and one customer in the contract services segment represented $6.3 million of revenue. In the six months ended June 30, 2019, one customer in the LEU segment represented $35.0 million of revenue and one customer in the contract services segment represented $8.7 million of revenue. In the three months ended June 30, 2018, individual customers in the LEU segment represented $18.6 million and $14.3 million of revenue, and one customer in the contract services segment represented $4.5 million of revenue. In the six months ended June 30, 2018, individual customers in the LEU segment represented $30.7 million and $14.4 million of revenue, and individual customers in the contract services segment represented $9.9 million and $9.2 million of revenue.

Revenue and Contracts with Cu_3

Revenue and Contracts with Customers (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Dec. 31, 2018
Advances from customers, noncurrent	$ 29.4	$ 14.5	$ 29.4	$ 15
Separative work units owed to others noncurrent	7.3		7.3
Government cost share portion	115		115
Company cost share portion	29		29
Government cost obligation	18.6		18.6
Government spending authorization	6.4		6.4
Loss on contracts	0.5		0.5
Accounts receivable, net	30.2		30.2	60.2
Government [Member]
Proceeds from Customers		4.7
Advances from customers				19.3
Gain (loss) related to litigation settlement		$ 9.5
Low Enriched Uranium Segment [Member]
Revenue, remaining performance obligation, amount	$ 1,100		$ 1,100	$ 1,000

Revenue and Contracts with Cu_4

Revenue and Contracts with Customers (Revenue from External Customers by Geographic Areas) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue	$ 10.6	$ 39.4	$ 49.3	$ 75.1
Product [Member]
Revenue	2.6	32.9	37.7	54.2
Product [Member] | United States
Revenue	$ 2.6	$ 32.9	$ 37.7	54
Product [Member] | Other Foreign
Revenue				$ 0.2

Revenue and Contracts with Cu_5

Revenue and Contracts with Customers (Contract with Customer Asset and Liability) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Revenue from Contract with Customer [Abstract]
Billed accounts receivable	$ 20.1	$ 20.1	$ 50.4
Billed accounts receivable – increase (decrease)		(30.3)
Uranium feed receivable	4.5	4.5	9.8
Uranium feed receivable - increase (decrease)		(5.3)
Unbilled contract revenue	5.6	5.6
Unbilled receivables – increase (decrease)		5.6
Accounts receivable, net	30.2	30.2	60.2
Accounts receivable - increase (decrease)		(30)
Deferred costs associated with deferred revenue	138.7	138.7	134.9
Deferred costs – increase (decrease)		3.8
Provision for Loss on Contracts	0.5	0.5
Loss on contracts	0.5	0.5
Deferred revenue	220.5	220.5	204.5
Deferred revenue – increase (decrease)		16
Advances from customers	46.7	46.7
Customer advances – increase (decrease)		46.7
Deferred revenue and advances from customers	267.2	267.2	204.5
Advances from customers, noncurrent	$ 29.4	29.4	$ 15	$ 14.5
Advances from customers, noncurrent - increase (decrease)		14.4
Deferred costs, additions		3.8
Deferred revenue, additions		$ 16

Special Charges (Table) (Detail

Special Charges (Table) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Termination benefit costs	$ (2.9)	$ 0.8
Payments for one-time termination benefits	(0.6)
Restructuring liability	0.6		$ 4.1
Contract Termination [Member]
Termination benefit costs	(2.9)
Payments for one-time termination benefits	(0.1)
Restructuring liability	0.4		3.2
Other Restructuring [Member]
Termination benefit costs	0
Payments for one-time termination benefits	(0.7)
Restructuring liability	$ 0.2		$ 0.9

Special Charges (Narrative) (De

Special Charges (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Special charges for workforce reductions and advisory costs	$ (2.9)	$ 0.3	$ (3)	$ 0.9
Termination benefit costs			(2.9)	0.8
Other restructuring costs				$ 0.1
Restructuring reserve, accrual adjustment			(2.9)
Restructuring liability, current	$ 0.6		0.6
Contract Termination [Member]
Termination benefit costs			$ (2.9)

Cash, Cash Equivalents and Re_3

Cash, Cash Equivalents and Restricted Cash (Schedule of Cash, Cash Equivalents and Restricted Cash) (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 88.3	$ 123.1
Restricted cash included in other current assets	18	30.3
Restricted cash included in other long-term assets	5.7	6.3
Total cash, cash equivalents and restricted cash	$ 112	$ 159.7	$ 176.3	$ 244.8

Cash, Cash Equivalents and Re_4

Cash, Cash Equivalents and Restricted Cash (Schedule of Restricted Cash) (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash included in other current assets	$ 18	$ 30.3
Restricted cash included in other long-term assets	5.7	6.3
Other financial assurance [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash included in other current assets	0.5	0.2
Restricted cash included in other long-term assets	0.3	0.3
ARO financial assurance [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash included in other current assets	16.9	16.6
Workers compensation financial assurance [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash included in other current assets	0.6
Restricted cash included in other long-term assets	5.4	6
Lease turnover financial assurance [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash included in other current assets	$ 0	13.5
Restricted cash included in other long-term assets		$ 0

Cash, Cash Equivalents and Re_5

Cash, Cash Equivalents and Restricted Cash (Narrative) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Restricted cash included in other current assets	$ 18	$ 30.3
Accrued lease turnover costs		1.6
Restricted cash included in other long-term assets	5.7	6.3
ARO financial assurance [Member]
Restricted cash included in other current assets	16.9	16.6
Increase (decrease) in restricted cash	13.5
Lease turnover financial assurance [Member]
Restricted cash included in other current assets	0	13.5
Restricted cash included in other long-term assets		0
Workers compensation financial assurance [Member]
Restricted cash included in other current assets	0.6
Restricted cash included in other long-term assets	$ 5.4	$ 6

Inventories (Schedule of Invent

Inventories (Schedule of Inventories) (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Inventory, Net [Abstract]
Separative work units inventory	$ 18.4	$ 20.1
Uranium inventory	123.3	109.6
Inventories	141.7	129.7
Separative work units owed to customers and suppliers	0.5	3.6
Uranium owed to customers and suppliers	58.5	99.4
Inventories owed to customers and suppliers	59	103
Separative work units net of liability	17.9	16.5
Uranium inventory net of liability	64.8	10.2
Inventories, net	$ 82.7	$ 26.7

Inventories (Narrative) (Detail

Inventories (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Inventory, Net [Abstract]
Inventory write-down	$ 2	$ 2.3

Schedule of Intangible Assets (

Schedule of Intangible Assets (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross	$ 123.5	$ 123.5
Accumulated intangible asset amortization	(49.8)	(47.5)
Amortizable intangible assets, net	$ 73.7	76
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	(28)	(28)
Amortizable intangible assets, net	26.6	26.6
Customer-Related Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross	68.9	68.9
Accumulated intangible asset amortization	(21.8)	(19.5)
Amortizable intangible assets, net	$ 47.1	$ 49.4

Schedule of Debt (Details)

Schedule of Debt (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Long-term debt, current	$ 33.6	$ 32.8
Long-term debt	117.1	120.2
Senior Notes [Member]
Debt Instrument [Line Items]
Long-term debt, face amount	74.3	74.3
Long-term debt, interest	42.8	45.9
Long-term debt, current	6.1	6.1
Long-term debt	117.1	120.2
Payment in Kind (PIK) Note [Member]
Debt Instrument [Line Items]
Long-term debt, carrying amount	0	0
Long-term debt, current	27.5	26.7
Long-term debt	$ 0	$ 0

Debt (Narrative) (Details)

Debt (Narrative) (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Long-term debt, current	$ 33.6	$ 32.8
Payment in Kind (PIK) Note [Member]
Debt instrument interest rate	8.00%
Long-term debt, carrying amount	$ 0	0
Long-term debt, current	$ 27.5	26.7
Senior Notes [Member]
Debt instrument interest rate	8.25%
Long-term debt, face amount	$ 74.3	74.3
Long-term debt, current	$ 6.1	$ 6.1

Leases (Narrative) (Details)

Leases (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019
Leases [Abstract]
Operating Lease, Weighted Average Remaining Lease Term	3 years 10 months 25 days		3 years 10 months 25 days
Operating Lease, Weighted Average Discount Rate, Percent	12.10%		12.10%
Operating Lease, Right-of-Use Asset	$ 7.3		$ 7.3
Operating Lease, Liability, Current	2.4		2.4
Operating Lease, Liability, Noncurrent	7.3		7.3
Operating Lease, Liability	9.7		9.7
Operating Lease, Expense	0.3	$ 0.9
Operating Lease, Expense Adjustment	0.5
Operating Lease, Payments			$ 0.8
Operating Lease, Liability, Increase	$ 2.9

Maturity of Operating Lease Lia

Maturity of Operating Lease Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Leases [Abstract]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	$ 1.8
Lessee, Operating Lease, Liability, Payments, Due Year Two	2.6	$ 0.9
Lessee, Operating Lease, Liability, Payments, Due Year Three	2.6	0.9
Lessee, Operating Lease, Liability, Payments, Due Year Four	1.7	1
Lessee, Operating Lease, Liability, Payments, Due Year Five	1	1
Lessee, Operating Lease, Liability, Payments, Due after Year Five	3.8	3.8
Lessee, Operating Lease, Liability, Payments, Due	13.5	$ 8.5
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	3.8
Operating Lease, Liability	$ 9.7

Leases Operating Lease Liabilit

Leases Operating Lease Liabilities, Payments Due (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Leases [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months		$ 0.9
Lessee, Operating Lease, Liability, Payments, Due Year Two	$ 2.6	0.9
Lessee, Operating Lease, Liability, Payments, Due Year Three	2.6	0.9
Lessee, Operating Lease, Liability, Payments, Due Year Four	1.7	1
Lessee, Operating Lease, Liability, Payments, Due Year Five	1	1
Lessee, Operating Lease, Liability, Payments, Due after Year Five	3.8	3.8
Lessee, Operating Lease, Liability, Payments, Due	$ 13.5	$ 8.5

Fair Value Measurements (Financ

Fair Value Measurements (Financial Instruments Recorded at Fair Value) (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Cash and cash equivalents	$ 88.3	$ 123.1
Cash and cash equivalents	88.3	123.1
Deferred compensation asset	1.7	1.4
Deferred compensation obligation	1.7	1.4
Level 1 [Member]
Cash and cash equivalents		123.1
Deferred compensation asset	1.7	1.4
Deferred compensation obligation	$ 1.7	$ 1.4

Fair Value Measurements (Narrat

Fair Value Measurements (Narrative) (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, current	$ 33.6	$ 32.8
Senior Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, long-term and short-term, combined carrying value	123.2	126.3
Long-term debt, current	6.1	6.1
Long-term debt, fair value	61.1	57.9
Long-term debt, face amount	74.3	74.3
Payment in Kind (PIK) Note [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, current	27.5	26.7
Long-term debt, fair value	$ 23.4	$ 21.8

Pension and Postretirement He_3

Pension and Postretirement Health and Life Benefits (Schedule of Net Benefit Costs) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Pension Plan, Defined Benefit [Member]
Service costs	$ 0.8	$ 0.9	$ 1.6	$ 1.7
Interest costs	7.6	7.2	15.2	14.4
Expected return on plan assets (gains)	(9.1)	(10.3)	(18.2)	(20.5)
Net periodic benefit cost (credit)	(0.7)	(2.2)	(1.4)	(4.4)
Postretirement Health and Life Benefits Plans [Member]
Interest costs	1.5	1.5	3	2.9
Amortization of prior service costs (credits), net	0	(0.1)	(0.1)	(0.1)
Net periodic benefit cost (credit)	$ 1.5	$ 1.4	$ 2.9	$ 2.8

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				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Per Share Calculation [Line Items]
Net income (loss)	$ (15.6)	$ (20.9)	$ (26.1)	$ (25)	$ (36.5)	$ (51.1)
Preferred stock dividends, undeclared and cumulative	2		2		4	4
Net income (loss) allocable to common stockholders	$ (17.6)		$ (28.1)		$ (40.5)	$ (55.1)
Weighted average number of shares outstanding, basic	9,565		9,118		9,549	9,111
Potentially dilutive shares related to stock options	0		0		0	0
Weighted average number of shares outstanding, diluted	9,565		9,118		9,549	9,111
Net loss per share - basic and diluted	$ (1.84)		$ (3.08)		$ (4.24)	$ (6.05)
Antidilutive securities excluded from computation of earnings per share	77		3		80	10
Options with exercise price greater than market price	360		360		360	360

Commitment and Contingencies (D

Commitment and Contingencies (Details) $ in Millions	Jun. 30, 2019USD ($)
Claim filed, unrecorded gain contingency,	$ 42.8

Segment Information (Segment Re

Segment Information (Segment Reporting Information) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Revenue	$ 10.6	$ 39.4	$ 49.3	$ 75.1
Gross Profit	(4.3)	(10.7)	(9.8)	(16)
Low Enriched Uranium Segment [Member]
Segment Reporting Information [Line Items]
Gross Profit	(5.1)	(10)	(8.3)	(23.5)
Contract Services Segment [Member]
Segment Reporting Information [Line Items]
Gross Profit	0.8	(0.7)	(1.5)	7.5
Separative Work Units [Member]
Segment Reporting Information [Line Items]
Revenue	0	32.9	12.4	50.6
Uranium [Member]
Segment Reporting Information [Line Items]
Revenue	2.6	0	25.3	3.6
Product [Member]
Segment Reporting Information [Line Items]
Revenue	2.6	32.9	37.7	54.2
Service [Member]
Segment Reporting Information [Line Items]
Revenue	$ 8	$ 6.5	$ 11.6	$ 20.9

Segment Information Schedule Of

Segment Information Schedule Of Entity Wide Revenue By Major Customers (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Customer A [Member] | Low Enriched Uranium Segment [Member]
Revenue, Major Customer [Line Items]
Revenue	$ 2.6
Customer A [Member] | Contract Services Segment [Member]
Revenue, Major Customer [Line Items]
Revenue			$ 8.7	$ 9.9
Customer B [Member] | Contract Services Segment [Member]
Revenue, Major Customer [Line Items]
Revenue	$ 6.3
Customer C [Member] | Low Enriched Uranium Segment [Member]
Revenue, Major Customer [Line Items]
Revenue		$ 18.6	$ 35	30.7
Customer D [Member] | Low Enriched Uranium Segment [Member]
Revenue, Major Customer [Line Items]
Revenue		14.3		14.4
Customer E [Member] | Contract Services Segment [Member]
Revenue, Major Customer [Line Items]
Revenue		$ 4.5		$ 9.2