EnergySolutions 10-Q 15 May 14 2014 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2014	15-May-14
Entity Information [Line Items]	'	'
Entity Registrant Name	'EnergySolutions, Inc.	'
Entity Central Index Key	'0001393744	'
Document Type	'10-Q	'
Document Period End Date	31-Mar-14	'
Amendment Flag	'false	'
Current Fiscal Year End Date	'--12-31	'
Entity Current Reporting Status	'Yes	'
Entity Filer Category	'Non-accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	100
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q1	'

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Mar. 31, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets:	'		'
Cash and cash equivalents	$65,579		$84,213
Accounts receivable, net of allowance for doubtful accounts	340,538		287,438
Costs and estimated earnings in excess of billings on uncompleted contracts	75,269		85,965
Prepaid expenses	9,977		10,157
Nuclear decommissioning trust fund investments, current portion	110,359		112,475
Deferred costs, current portion	101,192		91,841
Other current assets	5,628		5,711
Total current assets	708,542		677,800
Property, plant and equipment, net	131,665		114,476
Goodwill	266,247		309,508
Other intangible assets, net	180,321		214,361
Nuclear decommissioning trust fund investments	312,132		330,442
Restricted cash and decontamination and decommissioning deposits	205,830		293,896
Deferred costs	241,029		270,039
Deferred income taxes	28,023		29,707
Other noncurrent assets	177,905		180,314
Total assets	2,251,694	[1]	2,420,543
Current liabilities:	'		'
Current portion of long-term debt	0		65,000
Accounts payable	152,065		145,857
Accrued expenses and other current liabilities	270,388		208,177
Deferred income taxes	29,085		30,363
Facility and equipment decontamination and decommissioning liabilities, current portion	97,681		98,175
Unearned revenue, current portion	135,164		118,465
Total current liabilities	684,383		666,037
Long-term debt, less current portion	646,430		666,814
Pension liability	120,820		111,644
Facility and equipment decontamination and decommissioning liabilities	352,089		378,389
Deferred income taxes	0		12,497
Unearned revenue, less current portion	243,803		272,940
Other noncurrent liabilities	32,279		44,007
Total liabilities	2,079,804		2,152,328
Commitments and contingencies	0		0
Stockholders’ equity:	'		'
Common stock, $0.01 par value, 100 shares authorized as of March 31, 2014 and December 31, 2013, respectively, and 100 shares issued and outstanding as of March 31, 2014 and December 31, 2013, respectively.	0		0
Additional paid-in capital	536,361		535,288
Accumulated other comprehensive loss	-22,163		-22,877
Accumulated deficit	-342,795		-244,684
Total EnergySolutions stockholders’ equity	171,403		267,727
Noncontrolling interests	487		488
Total equity	171,890		268,215
Total liabilities and stockholders’ equity	$2,251,694		$2,420,543
[1]	Corporate unallocated assets relate primarily to income tax receivables, deferred tax assets, deferred financing costs, prepaid expenses, and property, plant and equipment that benefit the entire Company and cash

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Common stock, par value (in dollars per share)	$0.01	$0.01
Common stock, shares authorized	100	100
Common stock, shares issued	100	100
Common stock, shares outstanding	100	100

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (Unaudited) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014		Mar. 31, 2013
Revenue	$476,793	[1],[2]	$526,208	[1],[2]
Cost of revenue	-432,770		-479,788
Gross profit	44,023		46,420
Selling, general and administrative expenses	-30,882		-32,221
Impairment of goodwill and other intangible assets	-102,324		0
Equity in income of unconsolidated joint ventures	292		676
Income (loss) from operations	-88,891	[2],[3],[4]	14,875	[2],[3]
Interest expense	-21,356		-18,645
Other income, net	11,618		2,111
Loss before income taxes and noncontrolling interests	-98,629		-1,659
Income tax benefit (expense)	517		-6,539
Net loss	-98,112		-8,198
Less: Net (income) loss attributable to noncontrolling interests	1		-2
Net loss attributable to EnergySolutions	-98,111		-8,200
Other comprehensive income (loss):	'		'
Net loss	-98,112		-8,198
Foreign currency translation adjustments, net of taxes	840		-8,687
Change in unrecognized actuarial loss	-126		-478
Other comprehensive loss, net of taxes	-97,398		-17,363
Less: net (income) loss attributable to noncontrolling interests	1		-2
Comprehensive loss attributable to EnergySolutions	($97,397)		($17,365)
[1]	We eliminate intersegment revenue in consolidation. Intersegment revenue for the three month periods ended March 31, 2014, and 2013 was $0.7 million and $5.5 million, respectively. Revenue by segment represent revenue earned based on third-party billings to customers.
[2]	Results of our operations for services provided to our customers in Asia and Europe are included in our Products Group, and for services provided in Canada are included
[3]	For the three month periods ended March 31, 2014, and 2013, we recorded $0.3 million and $0.7 million, respectively of income from our unconsolidated joint ventures of which $0.1million and $0.2 million, respectively, of losses are attributable to LP&D operations; and $0.4 million and $0.9 million, respectively, of income is attributable to the Projects Group.
[4]	Losses from our International operations for the three month period ended March 31, 2014, included a $102.3 million non cash impairment charge related to Goodwill and the customer relationship intangible assets associated to the Magnox contract.

Condensed_Consolidated_Stateme1

Condensed Consolidated Statement of Changes in Stockholders' Equity (Unaudited) (USD $)	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit	Noncontrolling Interests
In Thousands, except Share data, unless otherwise specified
Balance at Dec. 31, 2013	$268,215	$0	$535,288	($22,877)	($244,684)	$488
Balance (in shares) at Dec. 31, 2013	100	100	'	'	'	'
Increase (Decrease) in Stockholders' Equity	'	'	'	'	'	'
Net loss	-98,112	'	'	'	-98,111	-1
Equity-based compensation	1,073	'	1,073	'	'	'
Change in unrecognized actuarial loss	-126	'	'	-126	'	'
Foreign currency translation, net of taxes	840	'	'	840	'	'
Balance at Mar. 31, 2014	$171,890	$0	$536,361	($22,163)	($342,795)	$487
Balance (in shares) at Mar. 31, 2014	100	100	'	'	'	'

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014		Mar. 31, 2013
Cash flows from operating activities	'		'
Net loss	($98,112)		($8,198)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:	'		'
Depreciation, amortization and accretion	16,706	[1]	17,400	[1]
Equity-based compensation expense	1,073		-342
Deferred income taxes	-10,963		-1,187
Amortization of debt financing fees and debt discount	4,415		1,801
Impairment of goodwill and other intangible assets	102,324		0
Gain on disposal of property, plant and equipment	-46		0
Realized and unrealized gains on nuclear decommissioning trust fund investments	-13,155		-5,354
Changes in operating assets and liabilities, net of effects from acquisition:	'		'
Accounts receivable	-45,820		-102,815
Costs and estimated earnings in excess of billings on uncompleted contracts	14,094		3,704
Prepaid expenses and other current assets	-161		6,543
Accounts payable	1,643		761
Accrued expenses and other current liabilities	32,386		69,911
Unearned revenue	-14,161		-29,708
Facility and equipment decontamination and decommissioning liabilities	-41,206		-41,384
Restricted cash and decontamination and decommissioning deposits	385		791
Nuclear decommissioning trust fund	32,938		38,289
Deferred costs	19,686		30,237
Other noncurrent assets	3,364		-8,033
Other noncurrent liabilities	-3,555		7,258
Net cash provided by (used in) operating activities	1,835		-20,326
Cash flows from investing activities	'		'
Purchase of nuclear decommissioning trust fund investments	-135,712		-188,286
Proceeds from sales of nuclear decommissioning trust fund investments	136,745		189,367
Acquisition of business, net of cash acquired	-20,996		0
Purchases of property, plant and equipment	-1,158		-3,082
Proceeds from disposition of property, plant and equipment	66		0
Net cash used in investing activities	-21,055		-2,001
Cash flows from financing activities	'		'
Repayments of long-term debt	-87,000		-16,592
Restricted cash held as collateral of letter of credit obligations	87,681		0
Minimum tax withholding on restricted stock awards	0		-431
Repayments of capital lease obligations	-208		-211
Debt financing fees	0		-3,160
Net cash provided by (used in) financing activities	473		-20,394
Effect of exchange rate on cash	113		-1,045
Net decrease in cash and cash equivalents	-18,634		-43,766
Cash and cash equivalents, beginning of period	84,213		134,191
Cash and cash equivalents, end of period	$65,579		$90,425
[1]	Depreciation, amortization and accretion expenses ("DA&A") are included in cost of revenue and SG&A expenses in the accompanying condensed consolidated statements of operations and comprehensive income (loss). DA&A expenses included in cost of revenue for the three month periods ended March 31, 2014, and 2013 were $11.5 million and $12.1 million, respectively. DA&A expenses included in SG&A for the three month periods ended March 31, 2014, and 2013, were $5.2 million and $5.3 million, respectively.

Description_of_Business

Description of Business	3 Months Ended
	Mar. 31, 2014
Description of Business	'
Description of Business	'
	Description of Business
	EnergySolutions, Inc. ("we," "our," "EnergySolutions" or the "Company") provides a broad range of services nationally and internationally. Our broad range of nuclear services includes engineering, in-plant support services, spent nuclear fuel management, decontamination and decommissioning ("D&D") services, operation of nuclear reactors, comprehensive long-term stewardship D&D work for shut-down nuclear power plants, logistics, transportation, processing and LLRW disposal. We derive almost 100% of our revenue from the provision of nuclear services. We operate facilities for the processing and disposal of radioactive materials, including one facility in Clive, Utah, our four facilities in Tennessee, or our two facilities in Barnwell, South Carolina and one facility in Brampton, Ontario, Canada. We also provide turn-key services and sub-contract services for the treatment, processing, storage and disposal of radioactive waste from nuclear sites and non-nuclear facilities.
	On January 7, 2013, the Company entered into an Agreement and Plan of Merger (the "Merger Agreement") with Rockwell Holdco, Inc., a Delaware corporation (the "Parent" or "Rockwell") and Rockwell Acquisition Corp., a Delaware corporation and wholly owned subsidiary of Parent ("Merger Sub") established as an acquisition vehicle for the purpose of acquiring the Company. The Merger Agreement was later amended on April 5, 2013. Pursuant to the terms of the Merger Agreement, as amended, on May 24, 2013, (the "Merger Date"), Merger Sub merged with and into the Company, with the Company surviving as a wholly-owned subsidiary of Parent (the "Merger"). Parent is 100% owned by Energy Capital Partners II, LP and its parallel funds ("Energy Capital" or "ECP") a private equity firm focused on investing in North America’s energy infrastructure.
	We have contracts with government and commercial customers. Our government customers are primarily individual offices, departments and administrations within the U.S. Department of Energy ("DOE"), U.S. Department of Defense ("DOD"), the Nuclear Decommissioning Authority ("NDA") in the United Kingdom ("U.K.") and state agencies. Our commercial customers include power and utility companies, pharmaceutical companies, research laboratories, manufacturing and industrial facilities, hospitals, universities and other commercial entities that are involved with nuclear materials.
	We report our results through four major operating groups: Projects, Products, Logistics, Processing and Disposal ("LP&D") and International.

Business_Combinations

Business Combinations	3 Months Ended
	Mar. 31, 2014
Business Combinations [Abstract]	'
Business Combinations	'
	Business Combinations
	On the Merger Date, each issued and outstanding share of common stock of the Company (other than shares of Company common stock held in the treasury of the Company or owned by Parent, affiliates of Parent, Merger Sub, a subsidiary of the Company or by stockholders who had validly exercised and perfected their appraisal rights under Delaware law), was converted into the right to receive $4.15 in cash, without interest and subject to any required withholding of taxes. The Company's common stock ceased to be traded on the New York Stock Exchange after close of market on May 24, 2013. The Company continues its operations as a privately-held company. The Company filed with the Securities and Exchange Commission (the "SEC"), or has had filed on its behalf, a Form 15 and Form 25 to deregister the Company's common stock under Sections 12(b) and (g) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), respectively, which deregistration became effective 90 days after the filing of the applicable form. Further, the Company's reporting obligations under Section 15(d) of the Exchange Act on account of its common stock were suspended effective January 1, 2014, at which time the Company ceased filing periodic reports with the SEC on account of its common stock, but continues to have public reporting obligations with the SEC with respect to its 10.75% Senior Notes due 2018, as required by the indenture governing such Senior Notes.
	We refer to the acquisition of EnergySolutions by Rockwell as the "Merger Transaction". The following events describe the transactions that occurred in connection with the Merger Transaction:
	•	Parent and EnergySolutions purchased and retired all of the Company's outstanding common stock as of the Merger Date and paid approximately $383.9 million in cash to the Company's stockholders. Of the total amount paid, EnergySolutions directly purchased 1.8 million shares for $7.3 million from cash on hand. The 1.8 million shares were issued as a result of accelerated vesting of previously issued restricted stock awards due to the change in control.
	•	Parent paid $10.9 million of Merger Transaction related costs on behalf of EnergySolutions. Payments made by Parent on the Company's behalf were accounted for as capital contributions. Of the $10.9 million transaction costs, approximately $3.1 million was capitalized as debt issuance costs and the remainder was expensed on the Merger Date and is included in the condensed consolidated statements of operations and comprehensive income (loss) under selling, general and administrative ("SG&A") expenses.
	•	EnergySolutions incurred $49.2 million of Merger Transaction related expenses which were funded by both, the Company and the Parent. These expenses were comprised primarily of employee incentive compensation and related payroll taxes of $26.9 million, professional fees of $13.4 million, lead arranger banker fees of $6.9 million and D&O run out insurance cost of $2.0 million. These expenses were included in the condensed consolidated statements of operations and comprehensive income (loss) under cost of revenue and SG&A expenses.
	The Merger Transaction was accounted for as a recapitalization, and accordingly, the Company will continue to apply its historical basis of accounting in its stand-alone financial statements after the Merger. This is based on our determination under Financial Accounting Standards Board ("FASB") accounting standards codification Topic 805 - Business Combinations, and SEC Staff Accounting Bulletin (SAB) No. 54, codified as Topic 5J, Push Down Basis of Accounting Required In Certain Limited Circumstances, that while the push down of Parent's basis in EnergySolutions is permissible, it was not required due to the existence of significant outstanding public debt securities at EnergySolutions.
	On March 4, 2014, we acquired Studsvik, Inc.'s Tennessee radioactive waste processing facilities located in Erwin and Memphis, Tennessee, the exclusive rights to use Studsvik's patented Thermal Organic Reduction ("THOR") technology, in the commercial North America markets and China, and the remaining equity interest in the SempraSafe LLC, joint venture, in which the Company previously owned an equity interest of 49.0%. Studsvik will retain patents and rights for THOR in other markets. The aggregate purchase price for the acquisition was $22.5 million. For the three month period ended March 31, 2014, we incurred $0.4 million in acquisition costs which are included in the condensed consolidated statements of operations and comprehensive income (loss) under cost of revenue and SG&A expenses.
	The table below presents the preliminary allocation to the purchase price to the estimated fair values of the assets acquired and liabilities assumed on the closing date (in thousands):
	Cash	$	1,461
	Accounts receivables	5,123
	Costs and estimated earnings in excess of billings on uncompleted contracts	3,152
	Other current assets	1,065
	Intangible assets	9,011
	Property, plant and equipment	20,595
	Accounts payable	(3,419		)
	Accrued expenses and other current liabilities	(4,047		)
	Unearned revenue	(1,718		)
	Asset retirement obligations	(8,766		)
	Total purchase price allocated	$	22,457
	The acquisition was accounted for by using the acquisition method of accounting. The assets acquired and liabilities assumed in connection with the acquisition, including identifiable intangible assets, have been measured at their fair value primarily using Level 3 inputs. Determining the fair value of the assets acquired and liabilities assumed requires judgment and involved the use of significant estimates and assumptions, including assumptions with respect to future cash inflows and outflows, discount rates, asset useful lives and market multiples, among other items. The use of different estimates and judgments could yield materially different results. The assets acquired and liabilities assumed in connection with the acquisition were allocated to the LP&D group.
	We have engaged an independent third party valuation firm to complete a business appraisal on the assets and the THOR technology acquired from Studsvik. Our preliminary purchase price allocation may differ from their results and as such adjustments may be required. A decrease in the preliminary fair market value of these assets may result in recognition of goodwill in future periods.

Basis_of_Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2014
Basis of Presentation	'
Basis of Presentation	'
	Basis of Presentation
	The accompanying unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the SEC regarding interim financial reporting. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements and should be read in conjunction with the audited consolidated financial statements and notes thereto contained in our Annual Report on Form 10-K for the year ended December 31, 2013 (the "2013 Annual Report").
	In the opinion of management, all material adjustments which are of a normal and recurring nature necessary for a fair presentation of the results for the periods presented have been reflected. Preparing financial statements requires management to make estimates and assumptions that affect the amounts that are reported in the condensed consolidated financial statements and accompanying disclosures. Although these estimates are based on our best knowledge of current events and actions that we may undertake in the future, actual results may be different from these estimates. The results of operations for the three months ended March 31, 2014 are not necessarily indicative of the results to be expected for any future period or the full fiscal year.
	We have majority voting rights for one of our minority-owned joint ventures. Accordingly, we have consolidated its operations in our consolidated financial statements and therefore, we recorded the noncontrolling interests, which reflect the portion of the earnings of operations which are applicable to other noncontrolling partners. Assets from our consolidated joint venture can only be used to settle its own obligations. Additionally, our assets cannot be used to settle the joint ventures’ obligations because this minority owned joint venture does not have recourse to our general credit.

Recent_Accounting_Pronouncemen

Recent Accounting Pronouncements	3 Months Ended
	Mar. 31, 2014
Accounting Changes and Error Corrections [Abstract]	'
Recent Accounting Pronouncements	'
	Recent Accounting Pronouncements
	Accounting Pronouncements Issued
	New accounting pronouncements implemented by the Company during the three month period ended March 31, 2014 or requiring implementation in future periods are discussed below or elsewhere in the notes, where appropriate.
	In April 2014, the Financial Accounting Standard Board (the "FASB") issued guidance related to presentation of financial statements (Topic 205) and property, plant, and equipment (Topic 360): reporting of discontinued operations and disclosures of disposals of components of an entity. This guidance defines a discontinued operation as a disposal of a component or group of components that is disposed of or is classified as held for sale and “represents a strategic shift that has (or will have) a major effect on an entity’s operations and financial results.” The standard states that a strategic shift could include a disposal of (i) a major geographical area of operations, (ii) a major line of business, (iii) a major equity method investment, or (iv) other major parts of an entity. Although “major” is not defined, the standard provides examples of when a disposal qualifies as a discontinued operation. An entity is required to present in the statement of cash flows or disclose in a note either (i) total operating and investing cash flows for discontinued operations, or (ii) depreciation, amortization, capital expenditures, and significant operating and investing non cash items related to discontinued operations. Additional disclosures are required when an entity retains significant continuing involvement with a discontinued operation after its disposal, including the amount of cash flows to and from a discontinued operation. This guidance is effective in the first quarter of 2015 and early adoption is permitted. The Company is evaluating the impact of this guidance on its financial statements and disclosures.
	In July 2013, the FASB issued guidance related to presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. The guidance eliminates diversity in practice for presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is available to reduce the taxable income or tax payable that would result from disallowance of a tax position. This guidance is effective for interim and annual reporting periods beginning after December 15, 2013 and should be applied prospectively to all unrecognized tax benefits that exist at the effective date. The adoption of this guidance did not have a material impact on the Company’s financial position, results of operations or cash flows.
	In March 2013, the FASB issued guidance related to foreign currency matters. The standard update addresses the accounting for the release of cumulative translation adjustment when a parent either sells a part or all of its investment in a foreign entity or no longer holds a controlling financial interest in a business unit or a group of assets that do not produce a profit within a foreign entity. Under such circumstances, a parent company is required to release any related currency adjustments to earnings. The currency adjustment is released into earnings only if the sale or transfer results in a complete or substantially complete liquidation of the foreign entity in question. The standard update is effective for interim and annual reporting periods beginning after December 15, 2013. We adopted this guidance during the first quarter of fiscal year 2014. (See note 14 for our assessment of the impact of adopting this guidance).

Trust_Fund_Investments

Trust Fund Investments	3 Months Ended
	Mar. 31, 2014
Investments, Debt and Equity Securities [Abstract]	'
Trust Fund Investments	'
	Trust Fund Investments
	The nuclear decommissioning trust ("NDT") fund was established solely to satisfy obligations related to the D&D of the Zion Station. The NDT fund holds investments in marketable debt and equity securities directly and indirectly through commingled funds. Investments in the NDT fund are carried at fair value and are classified as trading securities. We consolidate the NDT fund as a variable interest entity ("VIE"). We have a contractual interest in the NDT fund and this interest is a variable interest due to its exposure to the fluctuations caused by market risk. We are able to control the NDT fund by appointing the trustee and, subject to certain restrictions, we are able to direct the investment policies of the fund. We are the primary beneficiary of the NDT fund as we benefit from positive market returns and bear the risk of market losses.
	A portion of our NDT fund is invested in a securities lending program with the trustee of the NDT fund. The program authorizes the trustee of the NDT fund to loan securities that are assets of the NDT fund to approved borrowers. Borrowers have the right to sell or re-pledge the loaned securities. The trustee requires borrowers, pursuant to a security lending agreement, to deliver collateral to secure each loan. The securities are required to be collateralized by cash, U.S. government securities or irrevocable bank letters of credit. Initial collateral levels are no less than 102% and 105% of the market value of the borrowed securities for collateral denominated in U.S. and foreign currency, respectively.
	NDT fund investments consisted of the following (in thousands):
		As of March 31, 2014											As of December 31, 2013
		Amortized			Gross		Gross			Estimated			Amortized		Gross		Gross			Estimated
		cost			unrealized		unrealized			fair value			cost		unrealized		unrealized			fair value
					gains		losses								gains		losses
	Assets
	Receivables for securities sold	$	5,218		$	—	$	—		$	5,218		$	4,568	$	—	$	—		$	4,568
	Investments
	Corporate debt securities	167,594			9,279		(518		)	176,355			201,377		8,050		(2,352		)	207,075
	Equity securities	200			14		—			214			400		13		—			413
	Direct lending securities	138,436			10,420		(2,479		)	146,377			134,161		11,476		(3,387		)	142,250
	Debt securities issued by states of the U.S.	20,660			1,121		(120		)	21,661			23,725		761		(468		)	24,018
	Cash and cash equivalents	49,390			—		—			49,390			29,686		—		—			29,686
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	24,377			512		(317		)	24,572			35,685		77		(855		)	34,907
	Total investments	400,657			21,346		(3,434		)	418,569			425,034		20,377		(7,062		)	438,349
	Total assets	405,875			21,346		(3,434		)	423,787			429,602		20,377		(7,062		)	442,917
	Liabilities
	Payable for securities purchased	(1,296		)	—		—			(1,296		)	—		—		—			—
	Total liabilities	(1,296		)	—		—			(1,296		)	—		—		—			—
	Net assets held by the NDT fund	$	404,579		$	21,346	$	(3,434	)	422,491			$	429,602	$	20,377	$	(7,062	)	442,917
	Less: current portion									(110,359		)								(112,475		)
	Long-term investments									$	312,132									$	330,442
	Investments held by the NDT fund, net, totaled $422.5 million and $442.9 million as of March 31, 2014 and December 31, 2013, respectively, and are included in current and other long-term assets in the accompanying condensed consolidated balance sheets, depending on the expected timing of usage of funds. We have withdrawn from the NDT fund approximately $32.9 million and $38.3 million for three month periods ended March 31, 2014 and 2013, respectively, to pay for Zion Station D&D project expenses and estimated trust income taxes. In addition, we paid fees associated with the management of the NDT fund investments of approximately $1.0 million and $1.1 million, respectively. These fees are included in other income, net, in the condensed consolidated statements of operations and comprehensive income (loss).
	We record changes to the fair value of the NDT fund investments as unrealized gains or losses. For the three month periods ended March 31, 2014 and 2013, we recorded $4.6 million of unrealized gains and $6.0 million of unrealized losses, respectively. Investment income related to sales of investments, dividends and interest payments received from investments held by the NDT fund are recorded as realized gains or losses. For the three month periods ended March 31, 2014 and 2013, we recorded $8.5 million and $11.3 million, of realized gains, respectively. Both, unrealized and realized gains and losses on the NDT fund investments are included in other income, net, in the accompanying condensed consolidated statements of operations and comprehensive income (loss).

Fair_Value_Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	Fair Value Measurements
	We have implemented the accounting requirements for financial assets, financial liabilities, non-financial assets and non-financial liabilities reported or disclosed at fair value. The requirements define fair value, establish a three level hierarchy for measuring fair value in GAAP, and expand disclosures about fair value measurements. Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that a company has the ability to access at the measurement date. Level 2 inputs are inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly. Level 3 inputs are unobservable inputs for the assets or liabilities.
	This hierarchy requires us to use observable market data, when available, and to minimize the use of unobservable inputs when determining fair value. The methods described above may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. Furthermore, while we believe our valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date. Assets are classified in their entirety based on the lowest level of input that is significant to their fair value measurement.
	The carrying value of accounts receivable, costs, and estimated earnings in excess of billings on uncompleted contracts, prepaid assets, accounts payable, and accrued expenses approximate their fair value principally because of the short-term nature of these assets and liabilities.
	The fair market value of our term loan is estimated utilizing market quotations for debt that have quoted prices in active markets. Since our term loan does not trade on a daily basis in an active market, the fair value estimates are based on market observable inputs based on borrowing rates currently available for debt with similar terms and average maturities and is categorized as Level 2. The fair value of our term loan is calculated by taking the mid-point of the trading prices and multiplying it by the outstanding principal balance of our term loan. The fair market value of our term loan was approximately $356.1 million as of March 31, 2014 and $444.4 million as of December 31, 2013. The carrying value of our term loan was $353.0 million as of March 31, 2014 and $440.0 million as of December 31, 2013.
	In the case of our senior notes, we estimate fair value based on quoted market prices from active markets as they are publicly traded and are categorized as Level 1. As of March 31, 2014 and December 31, 2013, we had outstanding senior notes obligations with a carrying amount of $300.0 million and $300.0 million, respectively, with a fair market value of approximately $317.8 million as of March 31, 2014 and $320.2 million as of December 31, 2013.
	The following table presents the NDT fund investments measured at fair value (in thousands):
		As of March 31, 2014										As of December 31, 2013
		Total			Quoted Prices			Significant		Significant		Total		Quoted Prices		Significant		Significant
		Investments			in Active			Other		Unobservable		Investments		in Active		Other		Unobservable
		at Fair			Markets for			Observable		Inputs		at Fair		Markets for		Observable		Inputs
		Value			Identical			Inputs		Level 3		Value		Identical		Inputs		Level 3
					Assets			Level 2						Assets		Level 2		(revised)
					Level 1									Level 1
	Assets
	Receivables for securities sold	$	5,218		$	5,218		$	—	$	—	$	4,568	$	4,568	$	—	$	—
	Investments
	Cash and cash equivalents	49,390			49,390			—		—		29,686		29,686		—		—
	Fixed income securities(1)	222,588			24,572			198,016		—		266,000		34,907		231,093		—
	Equity securities(2)	214			214			—		—		413		413		—		—
	Direct lending securities(3)	146,377			—			—		146,377		142,250		—		—		142,250
	Total investments	418,569			74,176			198,016		146,377		438,349		65,006		231,093		142,250
	Total assets	423,787			79,394			198,016		146,377		442,917		69,574		231,093		142,250
	Liabilities
	Payable for securities purchased	(1,296		)	(1,296		)	—		—		—		—		—		—
	Total liabilities	(1,296		)	(1,296		)	—		—		—		—		—		—
	Net assets held by the NDT fund	$	422,491		$	78,098		$	198,016	$	146,377	$	442,917	$	69,574	$	231,093	$	142,250
	_____________________________
	-1	For fixed income securities, multiple prices from pricing services are obtained from pricing vendors whenever possible, which enables cross- provider validations in addition to checks for unusual daily movements. A primary price source is identified based on asset type, class or issue for each security. The trustee monitors prices supplied by pricing services and may use a supplemental price source or change the primary price source of a given security if the portfolio managers challenge an assigned price and the trustee determines that another price source is considered to be preferable. U.S. Treasury securities are categorized as Level 1 because they trade in a highly liquid and transparent market. Investments with maturities of three months or less when purchased, including certain short-term fixed income securities, are considered cash equivalents and are also categorized as Level 1. The fair values of fixed income securities, excluding U.S. Treasury securities, are based on evaluated prices that reflect observable market information, such as actual trade information or similar securities, adjusted for observable differences and are categorized in Level 2.
	-2	With respect to individually held equity securities, the trustee obtains prices from pricing services, whose prices are obtained from direct feeds from market exchanges. The fair values of equity securities held directly by the trust fund are based on quoted prices in active markets and are categorized in Level 1. Equity securities held individually are primarily traded on the New York Stock Exchange and NASDAQ Global Select Market, which contain only actively traded securities due to the volume trading requirements imposed by these national securities exchanges.
	-3	Direct lending securities are investments in managed funds that invest in private companies for long-term capital appreciation. The fair value of these securities is determined using either an enterprise value model or a bond valuation model. The enterprise value model develops valuation estimates based on valuations of comparable public companies, recent sales of private and public companies, discounting the forecasted cash flows of the portfolio company, estimating the liquidation or collateral value of the portfolio company or its assets, considering offers from third parties to buy the portfolio company, its historical and projected financial results, as well as other factors that may impact value. Significant judgment is required in the applications of discounts or premiums applied to the prices of comparable companies for factors such as size, marketability and relative performance. Under the bond valuation model, expected future cash flows are discounted using a discount rate. The discount rate is composed of a market based rate for similar credits in the public market and an internal credit rate based on the underlying risk of the credit. Investments in direct lending funds are categorized as Level 3 because the fair value of these securities is based largely on inputs that are unobservable and also utilize complex valuation models. Investments in direct lending securities typically cannot be redeemed until maturity of the term loan.
	Management determines the value of Level 3 investments by considering third party valuations and have concluded that quantitative information about significant unobservable inputs used in valuing these investments is not reasonably available. This includes information regarding the sensitivity of the fair values to changes in the unobservable inputs. We obtain annual valuations from the fund managers and gain an understanding of the inputs and assumptions used in preparing the valuations. We also conclude on the reasonableness of the fair value of these investments. We obtain quarterly reports from the fund managers and review for consistency and reasonableness with regards to the valuations of these investments that were analyzed at the most recent year-end.
	The following table presents the roll forward for Level 3 assets and liabilities measured at fair value on a recurring basis (in thousands):
	Direct Lending Securities	March 31,			March 31,
		2014			2013
	Beginning balance	$	142,250		$	102,443
	Purchases and issuances	17,074			17,351
	Sales, dispositions and settlements	(12,802		)	(5,094		)
	Realized gains and losses	4			46
	Change in unrealized gains and losses	(149		)	3,112
	Ending balance	$	146,377		$	117,858

Joint_Ventures

Joint Ventures	3 Months Ended
	Mar. 31, 2013
Equity Method Investments and Joint Ventures [Abstract]	'
Joint Ventures	'
	Joint Ventures
	We use the equity method of accounting for our unconsolidated joint ventures. Under the equity method, we recognize our proportionate share of the net earnings of these joint ventures as a single line item under "Equity in income of unconsolidated joint ventures" in our condensed consolidated statements of operations and comprehensive income (loss). In accordance with authoritative guidance, we analyzed all of our joint ventures and classified them into two groups: (a) joint ventures that must be consolidated because we hold the majority voting interest, or because they are VIEs of which we are the primary beneficiary; and (b) joint ventures that do not need to be consolidated because we hold only a minority voting or other ownership interest, or because they are VIEs of which we are not the primary beneficiary.
	On March 4, 2014, we acquired from Studsvik Inc., the remaining equity interest in the SempraSafe LLC, joint venture, in which the Company previously owned an equity interest of 49.0%. As such, we discontinued the use of the equity method on the acquisition date and have since consolidated SempraSafe LLC's results of operations.
	For the three month period ended March 31, 2014, we performed an assessment on all of our other joint ventures and concluded that no other unconsolidated joint ventures should be consolidated and that no other consolidated joint ventures should be deconsolidated.
	The table below presents unaudited financial information, for our unconsolidated joint ventures (in thousands):
		As of		As of
		March 31,		December 31,
		2014		2013
	Current assets	$	51,023	$	55,229
	Current liabilities	30,905		30,606
		For The Three Month
		Period Ended
		March 31,
		2014		2013
	Revenue	$	32,493	$	26,506
	Gross profit	1,196		2,566
	Net income	1,086		2,275
	Net income attributable to EnergySolutions	292		676
	As of March 31, 2014 and December 31, 2013, we had investments in unconsolidated joint ventures of $6.5 million and $6.1 million, respectively, which are included in other long term assets in the condensed consolidated balance sheets.We received $2.2 million and $0 million in cash dividend distributions from our unconsolidated joint ventures for the three month periods ended March 31, 2014 and 2013, respectively.

Goodwill

Goodwill	3 Months Ended
	Mar. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill	'
	Goodwill
	The following summary sets forth the changes in goodwill for the three months period ended March 31, 2014 (in thousands):
		Gross		Foreign			Accumulated Impairment Losses			Total Goodwill
		Carrying		Currency
		Amount		Translation
	Beginning Balance at December 31, 2013	$	526,334	$	(7,826	)	$	(209,000	)	$	309,508
	Acquisitions	—		—			—			—
	Impairment	—		7,236			(50,668		)	(43,432		)
	Translation adjustments	—		171			—			171
	Ending balance at March 31, 2014	$	526,334	$	(419	)	$	(259,668	)	$	266,247
	The Company performs its annual goodwill impairment test in accordance with authoritative guidance for accounting for Goodwill and Other Intangible Assets, during the second quarter of each fiscal year, or more often when events occur or circumstances change that would, more likely than not, reduce the fair value of a reporting unit below its carrying value. For impairment analysis, we allocate goodwill at the reporting unit level. In determining our reporting units, we considered how the business is managed at the segment operating level, the financial information available to management to operate the business, and how the business leaders make decisions on allocation of resources and performance assessment of the Company. Our reporting units are: Projects, Products, LP&D and International.
	On March 31, 2014, the NDA announced that our team was not selected as the preferred bidder to manage the D&D of the Magnox sites for the next contract period. This event prompted us to perform an interim evaluation of our goodwill related to our international operations in the U.K. We determined that the fair value of our International reporting unit was below its carrying value and as such recorded a $50.9 million non cash impairment charge, of which $7.4 million relates to AOCIL resulting from foreign currency translation adjustments made since the acquisition date in June 2007. We measured the fair value of the International reporting unit by using management's business plans and projections as the basis for expected cash flows for the next five years, a 2.5% estimated residual growth rate for future years and a 17% weighted average discount rate. This non-cash charge reduced goodwill recorded in connection with previous acquisitions and did not impact our cash position, operating cash flow or debt covenants.

Other_Intangible_Assets

Other Intangible Assets	3 Months Ended
	Mar. 31, 2014
Intangible Assets, Net (Excluding Goodwill) [Abstract]	'
Other Intangible Assets	'
	Other Intangible Assets
	Other intangible assets consisted of the following (in thousands):
		As of March 31, 2014						As of December 31, 2013
		Gross		Accumulated			Weighted	Gross		Accumulated			Weighted
		Carrying		Amortization			Average	Carrying		Amortization			Average
		Amount					Remaining	Amount					Remaining
							Useful Life						Useful Life
	Permits	$	243,173	$	(88,714	)	15.6 years	$	243,173	$	(86,263	)	15.8 years
	Customer relationships	124,866		(110,848		)	3.1 years	161,903		(107,718		)	4.8 years
	Technology and other	24,501		(12,657		)	5.8 years	15,490		(12,224		)	2.1 years
	Total amortizable intangibles	$	392,540	$	(212,219	)	13.6 years	$	420,566	$	(206,205	)	12.8 years
	All of our other intangible assets are subject to amortization. Amortization expense was $6.6 million and $6.4 million for the three month periods ended March 31, 2014 and 2013, respectively. Amortization expense is included in cost of revenue and SG&A expenses within the condensed consolidated statement of operations and comprehensive income (loss).
	In connection with the performance of our goodwill impairment analysis for the International reporting unit, with respect to the Magnox contract loss, we determined that an indicator of impairment also existed with regard to the customer relationship intangible asset and initiated an evaluation in accordance with applicable accounting guidance. As of March 31, 2014, we had recorded a $39.8 million customer relationship intangible asset related this reporting unit. Based upon our analysis, we determined that the fair value of the customer relationship intangible asset was below its carrying value and as such recorded a non cash impairment charge of $36.7 million. We also recorded a loss of approximately $18.0 million of related AOCIL resulting from foreign currency translation adjustments made since the acquisition date in June 2007. Both charges are included in net income from operations within the condensed consolidated statement of operations and comprehensive income (loss).

LongTerm_Debt

Long-Term Debt	3 Months Ended
	Mar. 31, 2014
Debt Disclosure [Abstract]	'
Long-Term Debt	'
	Our outstanding long-term debt consists of the following (in thousands):
		March 31,			December 31,
		2014			2013
	Term loan facilities due through 2016(1)(2)	$	353,000		$	440,000
	Term loan unamortized discount	(4,013		)	(5,519		)
	Senior notes, 10.75% due through 2018	300,000			300,000
	Senior notes unamortized discount	(2,557		)	(2,667		)
	Revolving credit facility (3)	—			—
	Total debt	646,430			731,814
	Less: current portion	—			(65,000		)
	Total long-term debt	$	646,430		$	666,814
	______________________________
	-1	The variable interest rate on borrowings under our senior secured credit facility was 6.75% and 7.25% as of March 31, 2014, and December 31, 2013, respectively. Borrowings under the senior secured credit facility bear interest at a rate equal to Adjusted LIBOR plus 5.00% or ABR plus 4.00% in the case of the senior secured term loan; and Adjusted LIBOR plus 4.50%, or ABR plus 3.50% in the case of the senior secured revolving credit facility.
	-2	$202.2 million and $289.7 million of the term loan balances, for each of the periods ended March 31, 2014 and December 31, 2013, respectively, was held in a restricted cash account as collateral for the Company’s reimbursement obligations with respect to deposit letters of credit.
	-3	Includes a senior secured revolving credit facility due with availability of $105.0 million, of which $65.5 million was used to fund letters of credit issued as of March 31, 2014, with the balance being payable on August 13, 2015.
	On August 13, 2010, the Company entered into a senior secured credit facility with JPMorgan Chase Bank, N.A., as the administrative agent and collateral agent, consisting of a senior secured term loan in an aggregate principal amount of $560.0 million at a discount rate of 2.5%, with the balance being payable on August 13, 2016.
	On February 15, 2013, we entered into Amendment No. 2 to the Credit Agreement and Consent and Waiver (the "Second Loan Amendment"), which became effective on May 24, 2013 upon the consummation of the Merger. Pursuant to the Second Loan Amendment, the lenders and the administrative agent consented to i) a waiver of the change of control provisions and certain other covenants and provisions under the senior secured credit facility; ii) any repayment of our 10.75% Senior Notes due 2018, provided that any payments are funded from equity contributions made to us by ECP or its affiliates; iii) an extension to the maturity date of our senior secured revolving credit facility, subject to certain conditions and acceptance by the extending revolving lenders; and iv) 1% prepayment premium if any senior secured term loan is refinanced prior to the date that is one year following the execution date of the Second Loan Amendment.
	On October 11, 2013, we entered into Amendment No. 3 to the Credit Agreement (the "Third Loan Amendment"), which extended the mandatory debt prepayment deadline on our collective senior debt to 270 days after the Third Loan Amendment's effective date of October 15, 2013, and increased the applicable margin for our senior secured term loan and revolving credit facility by 0.50% until we reduce the aggregate outstanding amount of senior secured term loan under the amended senior secured credit facility and our 10.75% Senior Notes due 2018 to $675.0 million or less. During the first quarter of 2014, we made principal debt repayments totaling $87.0 million, with funds released from our restricted cash escrow account, bringing the aggregate outstanding principal balance of our debt down to $653.0 million. As a result, as of March 21, 2014, we have met the requirements of the Third Loan Amendment and the interest rates on the senior secured term loan and revolving credit facility decreased by 0.50%.
	During 2013, in connection with the execution of amendments to our senior secured credit facility, we paid to our lenders $7.6 million in consent fees, of which $3.2 million was recorded during the three month period ended March 31, 2013. All consent fees were capitalized and are included in other noncurrent assets within the condensed consolidated balance sheet as of March 31, 2014. Parent contributed $3.1 million to fund the payment of these consent fees in 2013. During 2013, we also paid $8.0 million of lead arranger banker fees, of which $2.7 million was recorded during the three month period ended March 31, 2013, and were included in other income, net, within the condensed consolidated statement of operations and comprehensive income (loss). Parent contributed $4.3 million to fund the payment of these lead arranger banker fees in 2013.
	Covenants
	The senior secured credit facility requires the Company to maintain a leverage ratio (based upon the ratio of indebtedness for money borrowed to consolidated adjusted EBITDA, as defined in the senior secured credit facility) and an interest coverage ratio (based upon the ratio of consolidated adjusted EBITDA to consolidated cash interest expense), both of which are calculated quarterly. Failure to comply with these financial ratio covenants would result in an event of default under the senior secured credit facility and, absent a waiver or an amendment from the lenders, preclude us from making further borrowings under the senior secured credit facility and permit the lenders to accelerate repayment of all outstanding borrowings under the senior secured credit facility. We are required to maintain a maximum total leverage ratio of 4.0 for the quarter ending March 31, 2014, which is reduced by 0.25 on an annual basis through the maturity date. We are required to maintain a minimum cash interest coverage ratio of 2.00 from the quarter ended March 31, 2014 through the quarter ended September 30, 2014 and 2.25 through the maturity date. As of March 31, 2014, our total leverage and cash interest coverage ratios were 2.96 and 2.41, respectively.
	The senior secured credit facility also contains a number of affirmative and restrictive covenants including limitations on mergers, consolidations and dissolutions, sales of assets, investments and acquisitions, indebtedness, liens, affiliate transactions, and dividends and restricted payments. Under the senior secured credit facility, we are permitted maximum annual capital expenditures of $40.0 million for 2014 and each year thereafter, plus for each year the lesser of (1) a one year carryforward of the unused amount from the previous fiscal year and (2) 50% of the amount permitted for capital expenditures in the previous fiscal year. The senior secured credit facility contains events of default for non-payment of principal and interest when due, a cross-default provision with respect to other indebtedness having an aggregate principal amount of at least $5.0 million and an event of default that would be triggered by a change of control, as defined in the senior secured credit facility. Capital expenditures for the three month period ended March 31, 2014 were $1.2 million. As of March 31, 2014, we were in compliance with all of the covenants under our senior secured credit facility.
	The obligations under the senior secured credit facility are secured by a lien on substantially all of the assets of the Company and each of the Company’s domestic subsidiary guarantors, including a pledge of equity interests with the exception of the equity interests in our ZionSolutions subsidiary, which includes investments in the NDT fund of approximately $422.5 million as of March 31, 2014, and other special purpose subsidiaries, whose organizational documentation prohibits or limits such pledge.
	Senior Notes
	On August 13, 2010, we completed a $300.0 million private offering of 10.75% senior notes at a discount rate of 1.3%. The senior notes are governed by an indenture among EnergySolutions and Wells Fargo Bank, National Association, as trustee. Interest on the senior notes is payable semiannually in arrears on February 15 and August 15 of each year beginning on February 15, 2011. The senior notes rank in equal right of payment to all existing and future senior debt and senior in right of payment to all future subordinated debt.
	At any time prior to August 15, 2014, we are entitled to redeem all or a portion of the senior notes at a redemption price equal to 100% of the principal amount of the senior notes plus an applicable make-whole premium, as of, and accrued and unpaid interest to, the redemption date. In addition, on or after August 15, 2014, we may redeem all or a portion of the senior notes at the following redemption prices during the 12-month period commencing on August 15 of the years set forth below, plus accrued and unpaid interest to the redemption date.
	Period	Redemption
		Price
	2014	105.375	%
	2015	102.688	%
	2016 and thereafter	100	%
	The senior notes are guaranteed on a senior unsecured basis by all of our domestic restricted subsidiaries that guarantee the senior secured credit facility. The senior notes and related guarantees are effectively subordinated to our secured obligations, including the senior secured credit facility and related guarantees, to the extent of the value of assets securing such debt. The senior notes are structurally subordinated to all liabilities of each of our subsidiaries that do not guarantee the senior notes. If a change of control of the Company occurs, each holder will have the right to require that we purchase all or a portion of such holder’s senior notes at a purchase price of 101% of the principal amount, plus accrued and unpaid interest to the date of the purchase. The indenture contains, among other things, certain covenants limiting our ability and the ability of one restricted subsidiary to incur or guarantee additional indebtedness, pay dividends or make other restricted payments, make certain investments, create or incur liens, sell assets and subsidiary stock, transfer all or substantially all of our assets, or enter into a merger or consolidation transactions, and enter into transactions with affiliates.
	Each subsidiary co-issuer and guarantor of our senior notes is exempt from reporting under the Exchange Act, pursuant to Rule 12h-5 under the Exchange Act, as the subsidiary co-issuer and each of the subsidiary guarantors is 100% owned by us, and the obligations of the co-issuer and the guarantees of our subsidiary guarantors are full and unconditional and joint and several. There are no significant restrictions on our ability or any subsidiary guarantor to obtain funds from its subsidiaries.
	During the three month periods ended March 31, 2014 and 2013, we made cash interest payments totaling $23.6 million and $25.2 million, respectively, related to our outstanding debt obligations as of those dates.

Facility_and_Equipment_Deconta

Facility and Equipment Decontamination and Decommissioning	3 Months Ended
	Mar. 31, 2014
Asset Retirement Obligation Disclosure [Abstract]	'
Facility and Equipment Decontamination and Decommissioning	'
	Facility and Equipment Decontamination and Decommissioning
	Our facility and equipment D&D liabilities consist of the following (in thousands):
		March 31,			December 31,
		2014			2013
	Facilities and equipment ARO—Zion Station	$	374,848		$	409,190
	Facilities and equipment ARO—Clive, UT	27,585			28,106
	Facilities and equipment ARO—other	44,091			35,446
	Total facilities and equipment ARO	446,524			472,742
	Barnwell Closure	3,246			3,822
		449,770			476,564
	Less: current portion	(97,681		)	(98,175		)
		$	352,089		$	378,389
	We recognize asset retirement obligations ("AROs") when we have a legal obligation to perform D&D and removal activities upon retirement of an asset. The fair value of an ARO liability is recognized in the period in which it is incurred, if a reasonable estimate of fair value can be made, and is added to the carrying amount of the associated asset, which is then depreciated over the remaining useful life of the asset, in the case of all our AROs except the Zion Station ARO. Our ARO is based on a cost estimate for a third party to perform the D&D work. This estimate is inflated, using an inflation rate, to the expected time at which the D&D activity will occur, and then discounted back, using our credit adjusted risk free rate, to the present value.
	The ARO established in connection with the Zion Station project differs somewhat from our traditional AROs. The assets acquired in the Zion Station transaction have no fair value, no future useful life and are in a shut-down, non-operating state. As a result, the ARO established in connection with the Zion Station project is not accompanied by a related depreciable asset. Changes to the ARO liability due to accretion expense and changes in cost estimates are recorded in cost of revenue in our condensed consolidated statements of operations and comprehensive income (loss). Also, since we perform most of the work related to the Zion Station ARO with internal resources, we recognized an ARO gain for the difference between our actual costs incurred and the recorded ARO which includes an element of profit. Due to the nature of this contract and the purpose of the license stewardship initiative, we have presented this gain in cost of revenue rather than as a credit to operating expense, as we would with our other AROs.
	The following is a roll forward of our facilities and equipment ARO liabilities (in thousands):
		March 31,
		2014
	Beginning Balance as of January 1	$	472,742
	Liabilities incurred(1)	8,766
	Liabilities settled	(40,552		)
	Accretion expense	5,568
	ARO estimate adjustments	—
	Ending liability	$	446,524
	_____________________________
	(1) Represents ARO liabilities related to the acquisition of Studsvik, Inc.'s Tennessee processing facilities located in Erwin and Memphis, Tennessee.
	Accretion expense represents adjustment to the ARO to reflect the passage of time. Accretion expense for three month periods ended March 31, 2014 and 2013, was $5.6 million and $6.6 million, respectively, and is included within cost of revenue in our condensed consolidated statements of operations and comprehensive income (loss).
	Our processing and disposal facilities operate under licenses and permits that require financial assurance for landfill closure, post-closure and remediation obligations. We provide for these requirements through a combination of restricted cash, cash deposits, escrow accounts, letters of credit, surety bonds and/or insurance policies.We also have funds held in trusts for completion of various site clean-up projects. As of March 31, 2014 and December 31, 2013, the closure and post-closure state regulatory requirements for our facilities were $141.9 million and $142.5 million, respectively. These assurance mechanisms do not extinguish our D&D liabilities.
	In connection with the execution of the Exelon Agreements, and in fulfillment of NRC regulations, we secured a $200.0 million letter of credit facility to further support the D&D activities at Zion Station. This letter of credit is fully collateralized with cash held in a restricted cash escrow account.

EquityBased_Compensation

Equity-Based Compensation	3 Months Ended
	Mar. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Equity-Based Compensation	'
	Equity-Based Compensation
	On May 24, 2013, the board of directors and stockholders of Parent approved the Stock Option Plan of Rockwell Holdco, Inc. (the "Rockwell Plan"), pursuant to which stock options may be granted to the employees, consultants, non-employee directors of Parent or its subsidiaries. Under the Rockwell Plan, 36,087 shares of Parent common stock have been reserved for issuance. Any option granted under the Rockwell Plan will be subject to terms and conditions contained in a written stock option agreement, and any shares of Parent common stock received upon exercise of an option under the Rockwell Plan will be subject to Parent’s Stockholders Agreement. The board of directors of Parent administers the Rockwell Plan and may amend, suspend or terminate the Rockwell Plan at any time.
	As of March 31, 2014, 34,867 options had been issued under the Rockwell Plan to employees of the Company. Our estimates of fair value for the stock options were made using the Black‑Scholes model based upon the fair value of the stock price on the date of grant, volatility of 72.2%, risk-free interest rate of 1.39% per year and expected life of 6.5 years. We are currently using the simplified method to calculate expected life, which is based on the average term of the options and the weighted‑average graded vesting period because we do not have sufficient exercise history to calculate an expected holding period. The risk-free rate is based on the U.S. Treasury rate for the expected life at the time of grant.
	In connection with our initial public offering, we adopted the EnergySolutions, Inc. 2007 Equity Incentive Plan (the "former Plan"). The former Plan had 10,440,000 shares reserved for issuance of stock options, restricted stock and other equity based awards to directors, officers, employees and consultants. No shares from the former Plan were granted during 2013.
	We recognize equity based compensation expense over the instruments' vesting periods based on the instruments' fair values on the measurement date, in SG&A expenses in the condensed consolidated statements of operations and comprehensive income (loss). We recorded $1.1 million and negative $0.3 million of stock based compensation expense for the three month periods ended March 31, 2014, and 2013, respectively. As of March 31, 2014, we had $18.7 million of unrecognized compensation expense related to outstanding stock options, which will be recognized over a weighted-average period of 4.2 years.
	We also had a phantom stock plan that provided cash or stock award based on the value of a number of shares to be paid out at the end of a specified period of time at the Company’s closing stock price on the vesting date. For the three month periods ended March 31, 2014 and 2013, we recorded $0 million and $1.6 million, respectively, of compensation expense related to these awards.
	On May 24, 2013, as a result of the completion of the Merger, a change in control occurred that resulted in immediate vesting of all outstanding share-based awards. The acceleration in vesting resulted from a preexisting change in control provision included in the terms of the awards issued under the former Plan. Both, the former Plan and the phantom stock plan were terminated on May 24, 2013. As such, we had no outstanding liabilities related to these plans as of March 31, 2014 or December 31, 2013.

Income_Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Income Taxes
	We recognized income tax benefit of $0.5 million and an income tax expense of $6.5 million for the three month periods ended March 31, 2014 and 2013, respectively, for year-to-date effective rates of negative 0.5% and negative 393.6%, respectively, based on an estimated annual effective tax rate method. The income tax benefit arises from income tax expense for certain entities in the U.K. and for the Zion NDT fund offset by a discrete benefit in the quarter related to other entities in the U.K. No benefits from losses in the U.S. are available to offset tax expense due to the full valuation allowance position.
	The 2014 effective tax rate differs from the statutory rate of 35% primarily as a result of the small amount of net tax benefit from the U.K. and Zion NDT fund relative to consolidated pretax book losses. The consolidated pretax book losses include large impairment charges in the U.K. for which no benefit is recorded as these amounts are not deductible for income tax purposes. The net income tax benefit for the quarter also includes a discrete benefit of approximately $2.0 million for the release of the valuation allowance against net operating loss deferred tax assets recorded in prior years for certain entities in the U.K. Recently enacted regulations allow the net operating losses of certain U.K. entities, previously subject to a full valuation allowance, to offset the taxable income of other U.K. entities. The realization of the deferred tax asset allowed the valuation allowance to be reversed in the current quarter.
	The 2013 negative effective tax rate differs from the statutory rate of 35% primarily as a result of the combination of income tax expense and pretax book losses. Income tax expense arises from income in certain jurisdictions in the U.K. and for the Zion NDT fund. No benefits from losses in the U.S. and other jurisdictions in the U.K. are available to offset tax expense due to their respective full valuation allowance positions. During the three month period ended March 31, 2013, an extension of the research and development credit in the U.S. was signed into law. While the Company fully intends to take advantage of the research and development credit for the 2012 and 2013 tax years, no benefit has been recorded in the financial statements due to the full valuation allowance position in the U.S.
	During the first quarter of 2014, the Company received a dividend from the U.K. operations of approximately $29.7 million. As of March 1, 2014, we have approximately $68.0 million of undistributed earnings of non-U.S. operations.
	During the three month periods ended March 31, 2014 and 2013, we made income tax payments, net of income tax refunds, of $2.6 million and $0.9 million, respectively.
	As of March 31, 2014 and December 31, 2013, we had $0.1 million and $0.1 million, respectively, of gross unrecognized tax benefits. These tax benefits were accounted for under guidance for accounting for uncertainties in income taxes.

Segment_Reporting_and_Business

Segment Reporting and Business Concentrations	3 Months Ended
	Mar. 31, 2014
Segment Reporting [Abstract]	'
Segment Reporting and Business Concentrations	'
	Segment Reporting and Business Concentrations
	During the fourth quarter of 2013, we streamlined our business groups to enable us to evaluate and oversee strategic initiatives more efficiently and to improve future growth and profitability. We report our results through four major operating segments: Projects, Products, LP&D and International. The chief operating decision maker now reviews the operating results of the four new segments.
	Certain reclassifications have been made to the segment information reported for prior periods, to conform to current year presentation.
	Our International operations derive revenue primarily through a contract with the NDA in the U.K. for the D&D of its ten Magnox nuclear power plant sites. We have exclusively managed the D&D of the Magnox sites for the NDA since June 2007. The operations for this contract are measured in the local currency and then translated into U.S. dollars. The balance sheet accounts, with the exception of retained earnings accounts, are translated using the current exchange rate at the balance sheet date and the operating results are translated using the average rates prevailing throughout the reporting period. The retained earnings equity accounts are translated at historical average rates. Accumulated translation gains or losses are recorded in accumulated other comprehensive income (loss) (“AOCIL”) and are included as a component of comprehensive income.
	On March 31, 2014, the NDA announced that our team was not selected as the preferred bidder to manage the D&D of the Magnox sites for the next contract period. As a result, the Company determined that the fair value of the related reporting unit was below its carrying value and as such recorded an impairment of goodwill and intangible assets in the amount of $102.3 million of which $22.2 million relates to AOCIL associated to those assets. The impairment charge is included in net income from operations within the condensed consolidated statement of operations and comprehensive income (loss).
	On September 1, 2014, after a five month transition period, the Company will no longer hold the shares of the parent body organization owning the Magnox contract. On this date and in accordance with topic 830-40-10 Derecognition of Cumulative Translation Adjustments upon Loss of Ownership Interest in a Foreign Entity, the Company will derecognize the AOCIL as a component of comprehensive income against the accrued impairment. On this date and in accordance with topic 810-10-40 Derecognition of a Group of Assets, the Company will also deconsolidate the Magnox entity. As of March 31, 2014, the Company held $380.7 million and $388.0 million in total assets and liabilities, respectively, related to that entity. For the three month periods ended March 31, 2014 and 2013, we recognized $318.0 million and $376.3 million, respectively, of revenues related to that entity.
	The following table presents the segment information by operating group (in thousands):
		As of and for the Three Month Period Ended March 31, 2014
		Projects		Products		LP&D		International			Corporate			Consolidated
											Unallocated Items
	Revenue from external customers(1)(2)	$	62,104	$	42,175	$	51,357	$	321,157		$	—		$	476,793
	Income (loss) from operations(2)(3)(7)	2,856		9,547		7,407		(93,580		)	(15,121		)	(88,891		)
	Depreciation, amortization and accretion expense(4)	5,555		520		7,805		1,978			848			16,706
	Goodwill	40,236		17,951		208,060		—			—			266,247
	Other long-lived assets(5)	15,453		15,635		262,796		3,727			14,375			311,986
	Purchases of property, plant and equipment	—		—		757		—			401			1,158
	Total assets(6)	1,080,881		65,265		543,107		458,918			103,523			2,251,694
		As of and for the Three Month Period ended March 31, 2013
		Projects		Products		LP&D		International			Corporate			Consolidated
											Unallocated Items
	Revenue from external customers(1)(2)	$	76,916	$	21,297	$	46,808	$	381,187		$	—		$	526,208
	Income (loss) from operations(2)(3)	4,584		3,791		6,683		16,919			(17,102		)	14,875
	Depreciation, amortization and accretion expense(4)	6,659		513		7,385		1,898			945			17,400
	Goodwill	40,236		17,951		208,096		39,149			—			305,432
	Other long-lived assets(5)	17,023		17,178		254,754		44,499			13,230			346,684
	Purchases of property, plant and equipment	—		50		2,766		5			261			3,082
	Total assets(6)	1,367,047		59,739		633,854		472,173			84,703			2,617,516
	______________________
	-1	We eliminate intersegment revenue in consolidation. Intersegment revenue for the three month periods ended March 31, 2014, and 2013 was $0.7 million and $5.5 million, respectively. Revenue by segment represent revenue earned based on third-party billings to customers.
	-2	Results of our operations for services provided to our customers in Asia and Europe are included in our Products Group, and for services provided in Canada are included in our LP&D and Projects Groups.
	-3	For the three month periods ended March 31, 2014, and 2013, we recorded $0.3 million and $0.7 million, respectively of income from our unconsolidated joint ventures of which $0.1million and $0.2 million, respectively, of losses are attributable to LP&D operations; and $0.4 million and $0.9 million, respectively, of income is attributable to the Projects Group.
	-4	Depreciation, amortization and accretion expenses ("DA&A") are included in cost of revenue and SG&A expenses in the accompanying condensed consolidated statements of operations and comprehensive income (loss). DA&A expenses included in cost of revenue for the three month periods ended March 31, 2014, and 2013 were $11.5 million and $12.1 million, respectively. DA&A expenses included in SG&A for the three month periods ended March 31, 2014, and 2013, were $5.2 million and $5.3 million, respectively.
	-5	Other long-lived assets include property, plant and equipment and other intangible assets.
	-6	Corporate unallocated assets relate primarily to income tax receivables, deferred tax assets, deferred financing costs, prepaid expenses, and property, plant and equipment that benefit the entire Company and cash.
	-7	Losses from our International operations for the three month period ended March 31, 2014, included a $102.3 million non cash impairment charge related to Goodwill and the customer relationship intangible assets associated to the Magnox contract.

Pension_Plans

Pension Plans	3 Months Ended
	Mar. 31, 2014
Compensation and Retirement Disclosure [Abstract]	'
Pension Plans	'
	Pension Plans
	Net periodic benefit costs related to the Magnox pension plan consisted of the following (in thousands):
		For The Three Month
		Period Ended
		March 31,
		2014			2013
	Service cost	$	16,552		$	14,216
	Interest cost	45,559			38,726
	Expected return on plan assets	(54,084		)	(45,290		)
	Net actuarial loss	83			78
	Total net periodic benefit costs	$	8,110		$	7,730

Restructuring

Restructuring	3 Months Ended
	Mar. 31, 2014
Restructuring and Related Activities [Abstract]	'
Restructuring	'
	Restructuring
	In 2012, we initiated a restructuring plan (the "Restructuring Plan") to reduce operating costs and improve profitability within our operations in the U.S. Under the Restructuring Plan, we reduced our facility footprint and implemented a reduction of force across multiple business segments and functions.
	During 2012, in connection with the plan, we recorded restructuring charges related to severance and employee termination benefits. In February 2013, we announced that we had substantially completed the Restructuring Plan. The corresponding liabilities as of March 31, 2014 and December 31, 2013 were $0.6 million and $1.1 million, respectively, and are included in accrued expenses and other current liabilities and other noncurrent liabilities in the condensed consolidated balance sheets. The remaining unpaid termination benefits are expected to be paid within the next six months.
	We also recorded restructuring charges associated with lease and contract terminations. The corresponding accrued liabilities as of March 31, 2014 and December 31, 2013 were $9.1 million and $9.5 million, respectively, of which $7.0 million and $7.3 million, respectively, were included in other long term liabilities in the condensed consolidated balance sheets. For the three month periods ended March 31, 2014 and 2013, we recognized $0 million and $1.8 million, respectively, in restructuring charges associated with lease contract terminations. These charges are included in the condensed consolidated statements of operations and comprehensive income (loss) under cost of revenue related to our LP&D operations. In determining facilities lease loss liability, various assumptions were made, including the time period over which the buildings will be vacant, expected sublease terms and expected sublease rates. Adjustments to this accrual may be required in future periods if events and circumstances change.
	In 2009, we started an initial organizational review of our Magnox sites and identified an opportunity to reduce the existing workforce, primarily at three sites at which decommissioning was relatively close to completion with only a few projects remaining. The termination plan was presented in two phases and was approved by the NDA. As a result of overstaffing at the Magnox sites, approximately 300 employees left us on a voluntary basis. For the three month period ended March 31, 2013, we recognized an additional $55.6 million of expected employee termination benefits related to the termination of approximately 200 employees at the Bradwell site, which is rapidly moving into the early care and maintenance phase. Additionally, we also accrued employee termination benefits for the Chapelcross site, which is decreasing in size following completion of defueling activities and is preparing for further decommissioning, as well as the Dungeness, Oldbury, Trawsfynydd sites, which are getting ready to re-shape the workforce following cessation of power generation in 2014. No termination benefits were recognized for the three month period ended March 31, 2014. These benefits are included in cost of revenue in the accompanying condensed consolidated statements of operations and comprehensive income (loss) related to our International operations. The corresponding liability as of March 31, 2014 and December 31, 2013 was $41.7 million and $46.7 million, respectively, and is included in accrued expenses and other current liabilities and other long term liabilities in the condensed consolidated balance sheets. The remaining liability is expected to be paid over approximately the next 20 months.
	The following is a reconciliation of the beginning and ending liability balances related to the Magnox employee termination benefits (in thousands):
		March 31,
		2014
	Beginning liability	$	46,728
	Additions	—
	Payments	(5,453		)
	Effect of exchange rate	398
	Ending liability	41,673
	Less current portion	(10,676		)
		$	30,997
	The termination plan and employee benefits paid for the termination of these employees are in accordance with the existing employee and the trade union agreements and were pre-approved by the NDA. All employee termination benefits are treated as part of the normal Magnox cost base and are reimbursed by the NDA.

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	Commitments and Contingencies
	We may become subject to various claims and legal proceedings covering matters that may arise in the ordinary course of our business activities.
	On March 31, 2014 the NDA announced that our team was not selected as the preferred bidder to manage the D&D of the Magnox sites for the next contract period. We have managed the Magnox sites for the NDA since June 2007 through our subsidiary EnergySolutions EU Limited. As permitted under English law, on April 28, 2014, EnergySolutions EU Limited issued a claim form in the High Court of Justice, Queen’s Bench Division, Technology and Construction Court, in respect of the NDA’s decision to award the rebid of the Magnox Contracts to another bidder. The claim form alleges, among other things, that the NDA failed to properly evaluate certain material submitted by our bid team, applied the evaluation criteria inconsistently, and erred in the assessment in its scoring of the competing bids. EnergySolutions EU Limited is seeking an award of damages and costs. Our teaming partner is not participating in this legal proceeding against the NDA.

Guarantor_and_NonGuarantor_Fin

Guarantor and Non-Guarantor Financial Information	3 Months Ended
	Mar. 31, 2014
Guarantor and Non-Guarantor Financial Information	'
Guarantor and Non-Guarantor Financial Information	'
	Guarantor and Non-Guarantor Financial Information
	The 2018 senior notes were issued by EnergySolutions, Inc., the parent company, and EnergySolutions, LLC (together with EnergySolutions, Inc., the "Issuers"). The senior notes are jointly and severally guaranteed on a full and unconditional basis by each of the EnergySolutions, Inc.’s current and future domestic 100% owned subsidiaries that are guarantors under the senior secured credit facility, other than ZionSolutions LLC, which was established for the purpose of the Company’s license stewardship initiative, as well as up to five other special purpose subsidiaries that may be established for similar license stewardship projects, and certain other non-operating or immaterial subsidiaries.
	Presented below is the condensed consolidating financial information of the issuers, our subsidiaries that are guarantors (the "Guarantor Subsidiaries"), and our subsidiaries that are not guarantors (the "Non-Guarantor Subsidiaries"). The condensed consolidating financial information reflects the investments of EnergySolutions, Inc. in the Guarantor Subsidiaries and the Non-Guarantor Subsidiaries using the equity method of accounting.
	CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS
	For The Three Month Period ended March 31, 2014
	(in thousands)
		Energy			Energy			Guarantor			Non-			Eliminations			Consolidated
		Solutions,			Solutions,			Subsidiaries			Guarantor
		Inc.			LLC						Subsidiaries
	Revenue	$	—		$	18,510		$	120,240		$	352,456		$	(14,413	)	$	476,793
	Cost of revenue	—			(13,923		)	(98,030		)	(335,230		)	14,413			(432,770		)
	Gross profit	—			4,587			22,210			17,226			—			44,023
	Selling, general and administrative expenses	—			(15,835		)	(9,430		)	(5,617		)	—			(30,882		)
	Impairment of goodwill and other intangible assets	—			—			—			(102,324		)	—			(102,324		)
	Equity in income of unconsolidated joint ventures	—			—			292			—			—			292
	Operating income (loss)	—			(11,248		)	13,072			(90,715		)	—			(88,891		)
	Interest expense	—			(17,187		)	—			(4,169		)	—			(21,356		)
	Income (loss) from subsidiaries	(100,913		)	(72,512		)	—			—			173,425			—
	Other, net	—			34			29,790			(18,206		)	—			11,618
	Income (loss) before income taxes	(100,913		)	(100,913		)	42,862			(113,090		)	173,425			(98,629		)
	Provision for income taxes	2,802			—			—			(2,285		)	—			517
	Net income (loss)	(98,111		)	(100,913		)	42,862			(115,375		)	173,425			(98,112		)
	Less: net loss attributable to noncontrolling interests	—			—			1			—			—			1
	Net income (loss) attributable to EnergySolutions	$	(98,111	)	$	(100,913	)	$	42,863		$	(115,375	)	$	173,425		$	(98,111	)
	Other comprehensive income (loss):
	Net income (loss)	(98,111		)	(100,913		)	42,862			(115,375		)	173,425			(98,112		)
	Foreign currency translation adjustments, net of taxes	—			—			—			840			—			840
	Change in unrecognized actuarial loss	—			—			—			(126		)	—			(126		)
	Other comprehensive income (loss)	(98,111		)	(100,913		)	42,862			(114,661		)	173,425			(97,398		)
	Less: net loss attributable to noncontrolling interests	—			—			1			—			—			1
	Comprehensive income (loss) attributable to EnergySolutions	$	(98,111	)	$	(100,913	)	$	42,863		$	(114,661	)	$	173,425		$	(97,397	)
	CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS
	For The Three Month Period ended March 31, 2013
	(in thousands)
		Energy			Energy			Guarantor			Non-			Eliminations			Consolidated
		Solutions,			Solutions,			Subsidiaries			Guarantor
		Inc.			LLC						Subsidiaries
	Revenue	$	—		$	11,275		$	96,895		$	431,052		$	(13,014	)	$	526,208
	Cost of revenue	—			(7,195		)	(80,077		)	(405,530		)	13,014			(479,788		)
	Gross profit	—			4,080			16,818			25,522			—			46,420
	Selling, general and administrative expenses	—			(17,492		)	(9,975		)	(4,754		)	—			(32,221		)
	Equity in income of unconsolidated joint ventures	—			—			676			—			—			676
	Operating income (loss)	—			(13,412		)	7,519			20,768			—			14,875
	Interest expense	—			(15,190		)	—			(3,455		)	—			(18,645		)
	Income (loss) from subsidiaries	(6,236		)	24,772			—			—			(18,536		)	—
	Other, net	—			(2,406		)	163			4,354			—			2,111
	Income (loss) before income taxes	(6,236		)	(6,236		)	7,682			21,667			(18,536		)	(1,659		)
	Benefit from (provision for) income taxes	(1,964		)	—			—			(4,575		)	—			(6,539		)
	Net income (loss)	(8,200		)	(6,236		)	7,682			17,092			(18,536		)	(8,198		)
	Less: net income attributable to noncontrolling interests	—			—			—			(2		)	—			(2		)
	Net income (loss) attributable to EnergySolutions	$	(8,200	)	$	(6,236	)	$	7,682		$	17,090		$	(18,536	)	$	(8,200	)
	Other comprehensive income (loss):
	Net income (loss)	(8,200		)	(6,236		)	7,682			17,092			(18,536		)	(8,198		)
	Foreign currency translation adjustments, net of taxes	—			—			—			(8,687		)	—			(8,687		)
	Change in unrecognized actuarial gain	—			—			—			(478		)	—			(478		)
	Other comprehensive income (loss)	(8,200		)	(6,236		)	7,682			7,927			(18,536		)	(17,363		)
	Less: net income attributable to noncontrolling interests	—			—			—			(2		)	—			(2		)
	Comprehensive income (loss) attributable to EnergySolutions	$	(8,200	)	$	(6,236	)	$	7,682		$	7,925		$	(18,536	)	$	(17,365	)
	CONDENSED CONSOLIDATING BALANCE SHEET
	As of March 31, 2014
	(in thousands)
		Energy			Energy			Guarantor			Non-			Eliminations			Consolidated
		Solutions,			Solutions,			Subsidiaries			Guarantor
Inc.			LLC						Subsidiaries
Assets
Cash and cash equivalents	$	—		$	39,487		$	4,643		$	21,449		$	—		$	65,579
Accounts receivable, net of allowance for doubtful accounts	—			10,769			53,570			277,343			(1,144		)	340,538
Costs and estimated earnings in excess of billings on uncompleted contracts	—			9,080			40,701			28,234			(2,746		)	75,269
Nuclear decommissioning trust fund investments, current portion	—			—			—			110,359			—			110,359
Deferred costs, current portion	—			—			7,873			93,319			—			101,192
Other current assets	—			9,405			5,393			807			—			15,605
Total current assets	—			68,741			112,180			531,511			(3,890		)	708,542
Property, plant and equipment, net	—			74,975			54,860			1,830			—			131,665
Goodwill	—			35,769			228,116			2,362			—			266,247
Intangibles, net	—			155,398			21,744			3,179			—			180,321
Restricted cash	—			1,924			3,245			200,661			—			205,830
Nuclear decommissioning trust fund	—			—			—			312,132			—			312,132
Deferred Income Taxes	28,023			—			—			—			—			28,023
Deferred costs less current portion	—			—			—			241,029			—			241,029
Investment in subsidiaries	(165,294		)	620,690			—			—			(455,396		)	—
Intercompany receivable	337,082			—			198,794			10,625			(546,501		)	—
Other long term assets	—			8,839			18,553			150,513			—			177,905
TOTAL ASSETS	$	199,811		$	966,336		$	637,492		$	1,453,842		$	(1,005,787	)	$	2,251,694
Liabilities and Equity
Intercompany payable	$	—		$	—		$	3,775		$	10,509		$	(14,284	)	$	—
Deferred income taxes	29,085			—			—			—			—			29,085
Accounts payable	—			4,587			7,283			140,195			—			152,065
Accrued expenses and other current liabilities	—			74,171			20,912			176,269			(964		)	270,388
Unearned revenue, current portion	—			12,496			28,763			93,055			850			135,164
Facility and equipment decontamination and decommissioning	—			—			—			97,681			—			97,681
Total current liabilities	29,085			91,254			60,733			517,709			(14,398		)	684,383
Intercompany loan payable	—			535,993			—			—			(535,993		)	—
Long-term debt, less current portion	—			448,657			—			197,773			—			646,430
Facility and equipment decontamination and decommissioning liabilities, current portion	—			38,664			36,241			277,184			—			352,089
Unearned revenue, less current portion	—			—			—			243,803			—			243,803
Other liabilities, net	(677		)	17,062			1,335			135,379			—			153,099
Equity	171,403			(165,294		)	539,183			81,507			(455,396		)	171,403
Noncontrolling interests	—			—			—			487			—			487
TOTAL LIABILITIES AND EQUITY	$	199,811		$	966,336		$	637,492		$	1,453,842		$	(1,005,787	)	$	2,251,694
CONDENSED CONSOLIDATING BALANCE SHEET
As of December 31, 2013
(in thousands)
	Energy			Energy			Guarantor			Non-			Eliminations			Consolidated
	Solutions,			Solutions,			Subsidiaries			Guarantor
	Inc.			LLC						Subsidiaries
Assets
Cash and cash equivalents	$	—		$	33,556		$	872		$	49,785		$	—		$	84,213
Accounts receivable, net of allowance for doubtful accounts	—			13,793			47,034			229,138			(2,527		)	287,438
Costs and estimated earnings in excess of billings on uncompleted contracts	—			9,884			41,993			36,820			(2,732		)	85,965
Nuclear decommissioning trust fund investments, current portion	—			—			—			112,475			—			112,475
Deferred costs, current portion	—			—			333			91,508			—			91,841
Other current assets	—			6,548			4,402			4,918			—			15,868
Total current assets	—			63,781			94,634			524,644			(5,259		)	677,800
Property, plant and equipment, net	—			52,149			60,269			2,058			—			114,476
Goodwill	—			29,764			223,506			56,238			—			309,508
Intangibles, net	—			151,580			21,210			41,571			—			214,361
Restricted cash	—			89,537			3,821			200,538			—			293,896
Nuclear decommissioning trust fund	—			—			—			330,442			—			330,442
Deferred Income Taxes	29,707			—			—			—			—			29,707
Deferred costs less current portion	—			—			—			270,039			—			270,039
Investment in subsidiaries	(65,095		)	693,474			—			—			(628,379		)	—
Intercompany receivable	333,300			—			193,465			8,997			(535,762		)	—
Other long term assets	—			11,275			17,955			151,084			—			180,314
TOTAL ASSETS	$	297,912		$	1,091,560		$	614,860		$	1,585,611		$	(1,169,400	)	$	2,420,543
Liabilities and Stockholders’ Equity
Intercompany payable	$	—		$	—		$	5,215		$	22,626		$	(27,841	)	$	—
Accounts payable	—			5,198			16,027			124,632			—			145,857
Accrued expenses and other current liabilities	477			56,788			35,075			116,306			(469		)	208,177
Unearned revenue, current portion	—			2,229			23,296			92,515			425			118,465
Facility and equipment decontamination and decommissioning	—			—			—			98,175			—			98,175
Other current liabilities	19,261			65,000			—			11,102			—			95,363
Total current liabilities	19,738			129,215			79,613			465,356			(27,885		)	666,037
Intercompany loan payable	—			513,136			—			—			(513,136		)	—
Long-term debt, less current portion	—			469,260			—			197,554			—			666,814
Facility and equipment decontamination and decommissioning liabilities, current portion	—			30,375			36,981			311,033			—			378,389
Unearned revenue, less current portion	—			0			—			272,940			—			272,940
Other liabilities, net	10,447			14,669			1,944			141,088			—			168,148
Stockholders’ equity	267,727			(65,095		)	496,322			197,152			(628,379		)	267,727
Noncontrolling interests	—			—			—			488			—			488
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$	297,912		$	1,091,560		$	614,860		$	1,585,611		$	(1,169,400	)	$	2,420,543
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOW
For The Three Month Period Ended March 31, 2014
(in thousands)
	Energy			Energy			Guarantor			Non-			Eliminations			Consolidated
	Solutions,			Solutions,			Subsidiaries			Guarantor
	Inc.			LLC						Subsidiaries
Cash flow from operating activities
Net cash provided by (used in) operating activities	$	(95,463	)	$	(68,072	)	$	12,213		$	(29,504	)	$	182,661		$	1,835
Cash flow from investing activities
Purchases of property, plant and equipment	—			(1,180		)	—			22			—			(1,158		)
Purchase of investments in nuclear decommissioning trust fund	—			—			—			(135,712		)	—			(135,712		)
Proceeds from sales of nuclear decommissioning trust fund investments	—			—			—			136,745			—			136,745
Acquisition of business, net of cash acquired	—			(20,996		)	—			—			—			(20,996		)
Proceeds from sales of property, plant and equipment	—			66			—			—			—			66
Net cash provided by (used in) investing activities	—			(22,110		)	—			1,055			—			(21,055		)
Cash flows from financing activities
Intercompany loan receivable	(4,736		)	—			(8,442		)	—			13,178			—
Intercompany loan payable	—			22,797			—			—			(22,797		)	—
Investment in subsidiary	100,199			72,843			—			—			(173,042		)	—
Repayments of long term debt	—			(87,000		)	—			—			—			(87,000		)
Restricted cash held as collateral of letter of credit obligations	—			87,681			—			—			—			87,681
Repayments of capital lease obligations	—			(208		)	—			—			—			(208		)
Net cash provided by (used in) financing activities	95,463			96,113			(8,442		)	—			(182,661		)	473
Effect of exchange rate on cash	—			—			—			113			—			113
Net increase (decrease) in cash and cash equivalents	—			5,931			3,771			(28,336		)	—			(18,634		)
Cash and cash equivalents, beginning of period	—			33,556			872			49,785			—			84,213
Cash and cash equivalents, end of period	$	—		$	39,487		$	4,643		$	21,449		$	—		$	65,579
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOW
For The Three Month Period Ended March 31, 2013
(in thousands)
	Energy			Energy			Guarantor			Non-			Eliminations			Consolidated
	Solutions,			Solutions,			Subsidiaries			Guarantor
	Inc.			LLC						Subsidiaries
Cash flow from operating activities
Net cash provided by (used in) operating activities	$	(10,470	)	$	(9,127	)	$	(2,201	)	$	3,701		$	(2,229	)	$	(20,326	)
Cash flow from investing activities
Purchase of investments in nuclear decommissioning trust fund	—			—			—			(188,286		)	—			(188,286		)
Proceeds from sales of nuclear decommissioning trust fund investments	—			—			—			189,367			—			189,367
Purchases of property, plant and equipment	—			(942		)	(2,131		)	(9		)	—			(3,082		)
Net cash provided by (used in) investing activities	—			(942		)	(2,131		)	1,072			—			(2,001		)
Cash flows from financing activities
Intercompany loan receivable	(4,499		)	—			6,249			—			(1,750		)	—
Intercompany loan payable	—			(2,413		)	(1,514		)	—			3,927			—
Investment in subsidiary	15,400			(15,452		)	—			—			52			—
Repayments of long term debt	—			(16,592		)	—			—			—			(16,592		)
Debt financing fees	—			(1,960		)	—			(1,200		)	—			(3,160		)
Dividend: minority interest	—			—			—			—			—			—
Proceeds from issuance of common stock	—			—			—			—			—			—
Minimum tax withholding on restricted stock awards	(431		)	—			—			—			—			(431		)
Repayments of capital lease obligations	—			(211		)	—			—			—			(211		)
Net cash provided by (used in) financing activities	10,470			(36,628		)	4,735			(1,200		)	2,229			(20,394		)
Effect of exchange rate on cash	—			—			(23		)	(1,022		)	—			(1,045		)
Net increase (decrease) in cash and cash equivalents	—			(46,697		)	380			2,551			—			(43,766		)
Cash and cash equivalents, beginning of period	—			93,080			3,371			37,740			—			134,191
Cash and cash equivalents, end of period	$	—		$	46,383		$	3,751		$	40,291		$	—		$	90,425

Business_Combinations_Business

Business Combinations Business Combinations (Tables)	3 Months Ended
	Mar. 31, 2014
Business Combinations [Abstract]	'
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	'
	The table below presents the preliminary allocation to the purchase price to the estimated fair values of the assets acquired and liabilities assumed on the closing date (in thousands):
	Cash	$	1,461
	Accounts receivables	5,123
	Costs and estimated earnings in excess of billings on uncompleted contracts	3,152
	Other current assets	1,065
	Intangible assets	9,011
	Property, plant and equipment	20,595
	Accounts payable	(3,419		)
	Accrued expenses and other current liabilities	(4,047		)
	Unearned revenue	(1,718		)
	Asset retirement obligations	(8,766		)
	Total purchase price allocated	$	22,457

Trust_Fund_Investments_Tables

Trust Fund Investments (Tables)	3 Months Ended
	Mar. 31, 2014
Investments, Debt and Equity Securities [Abstract]	'
Schedule of NDT fund investments	'
	NDT fund investments consisted of the following (in thousands):
		As of March 31, 2014											As of December 31, 2013
		Amortized			Gross		Gross			Estimated			Amortized		Gross		Gross			Estimated
		cost			unrealized		unrealized			fair value			cost		unrealized		unrealized			fair value
					gains		losses								gains		losses
	Assets
	Receivables for securities sold	$	5,218		$	—	$	—		$	5,218		$	4,568	$	—	$	—		$	4,568
	Investments
	Corporate debt securities	167,594			9,279		(518		)	176,355			201,377		8,050		(2,352		)	207,075
	Equity securities	200			14		—			214			400		13		—			413
	Direct lending securities	138,436			10,420		(2,479		)	146,377			134,161		11,476		(3,387		)	142,250
	Debt securities issued by states of the U.S.	20,660			1,121		(120		)	21,661			23,725		761		(468		)	24,018
	Cash and cash equivalents	49,390			—		—			49,390			29,686		—		—			29,686
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	24,377			512		(317		)	24,572			35,685		77		(855		)	34,907
	Total investments	400,657			21,346		(3,434		)	418,569			425,034		20,377		(7,062		)	438,349
	Total assets	405,875			21,346		(3,434		)	423,787			429,602		20,377		(7,062		)	442,917
	Liabilities
	Payable for securities purchased	(1,296		)	—		—			(1,296		)	—		—		—			—
	Total liabilities	(1,296		)	—		—			(1,296		)	—		—		—			—
	Net assets held by the NDT fund	$	404,579		$	21,346	$	(3,434	)	422,491			$	429,602	$	20,377	$	(7,062	)	442,917
	Less: current portion									(110,359		)								(112,475		)
	Long-term investments									$	312,132									$	330,442

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2013
Fair Value Disclosures [Abstract]	'
Schedule of the NDT fund investments measured at fair value	'
	The following table presents the NDT fund investments measured at fair value (in thousands):
		As of March 31, 2014										As of December 31, 2013
		Total			Quoted Prices			Significant		Significant		Total		Quoted Prices		Significant		Significant
		Investments			in Active			Other		Unobservable		Investments		in Active		Other		Unobservable
		at Fair			Markets for			Observable		Inputs		at Fair		Markets for		Observable		Inputs
		Value			Identical			Inputs		Level 3		Value		Identical		Inputs		Level 3
					Assets			Level 2						Assets		Level 2		(revised)
					Level 1									Level 1
	Assets
	Receivables for securities sold	$	5,218		$	5,218		$	—	$	—	$	4,568	$	4,568	$	—	$	—
	Investments
	Cash and cash equivalents	49,390			49,390			—		—		29,686		29,686		—		—
	Fixed income securities(1)	222,588			24,572			198,016		—		266,000		34,907		231,093		—
	Equity securities(2)	214			214			—		—		413		413		—		—
	Direct lending securities(3)	146,377			—			—		146,377		142,250		—		—		142,250
	Total investments	418,569			74,176			198,016		146,377		438,349		65,006		231,093		142,250
	Total assets	423,787			79,394			198,016		146,377		442,917		69,574		231,093		142,250
	Liabilities
	Payable for securities purchased	(1,296		)	(1,296		)	—		—		—		—		—		—
	Total liabilities	(1,296		)	(1,296		)	—		—		—		—		—		—
	Net assets held by the NDT fund	$	422,491		$	78,098		$	198,016	$	146,377	$	442,917	$	69,574	$	231,093	$	142,250
	_____________________________
	-1	For fixed income securities, multiple prices from pricing services are obtained from pricing vendors whenever possible, which enables cross- provider validations in addition to checks for unusual daily movements. A primary price source is identified based on asset type, class or issue for each security. The trustee monitors prices supplied by pricing services and may use a supplemental price source or change the primary price source of a given security if the portfolio managers challenge an assigned price and the trustee determines that another price source is considered to be preferable. U.S. Treasury securities are categorized as Level 1 because they trade in a highly liquid and transparent market. Investments with maturities of three months or less when purchased, including certain short-term fixed income securities, are considered cash equivalents and are also categorized as Level 1. The fair values of fixed income securities, excluding U.S. Treasury securities, are based on evaluated prices that reflect observable market information, such as actual trade information or similar securities, adjusted for observable differences and are categorized in Level 2.
	-2	With respect to individually held equity securities, the trustee obtains prices from pricing services, whose prices are obtained from direct feeds from market exchanges. The fair values of equity securities held directly by the trust fund are based on quoted prices in active markets and are categorized in Level 1. Equity securities held individually are primarily traded on the New York Stock Exchange and NASDAQ Global Select Market, which contain only actively traded securities due to the volume trading requirements imposed by these national securities exchanges.
	-3	Direct lending securities are investments in managed funds that invest in private companies for long-term capital appreciation. The fair value of these securities is determined using either an enterprise value model or a bond valuation model. The enterprise value model develops valuation estimates based on valuations of comparable public companies, recent sales of private and public companies, discounting the forecasted cash flows of the portfolio company, estimating the liquidation or collateral value of the portfolio company or its assets, considering offers from third parties to buy the portfolio company, its historical and projected financial results, as well as other factors that may impact value. Significant judgment is required in the applications of discounts or premiums applied to the prices of comparable companies for factors such as size, marketability and relative performance. Under the bond valuation model, expected future cash flows are discounted using a discount rate. The discount rate is composed of a market based rate for similar credits in the public market and an internal credit rate based on the underlying risk of the credit. Investments in direct lending funds are categorized as Level 3 because the fair value of these securities is based largely on inputs that are unobservable and also utilize complex valuation models. Investments in direct lending securities typically cannot be redeemed until maturity of the term loan.
	Management determines the value of Level 3 investments by considering third party valuations and have concluded that quantitative information about significant unobservable inputs used in valuing these investments is not reasonably available. This includes information regarding the sensitivity of the fair values to changes in the unobservable inputs. We obtain annual valuations from the fund managers and gain an understanding of the inputs and assumptions used in preparing the valuations. We also conclude on the reasonableness of the fair value of these investments. We obtain quarterly reports from the fund managers and review for consistency and reasonableness with regards to the valuations of these investments that were analyzed at the most recent year-end.
Schedule of the rollforward for Level 3 assets and liabilities measured at fair value on a recurring basis	'
	The following table presents the roll forward for Level 3 assets and liabilities measured at fair value on a recurring basis (in thousands):
	Direct Lending Securities	March 31,			March 31,
		2014			2013
	Beginning balance	$	142,250		$	102,443
	Purchases and issuances	17,074			17,351
	Sales, dispositions and settlements	(12,802		)	(5,094		)
	Realized gains and losses	4			46
	Change in unrealized gains and losses	(149		)	3,112
	Ending balance	$	146,377		$	117,858

Joint_Ventures_Tables

Joint Ventures (Tables)	3 Months Ended
	Mar. 31, 2013
Equity Method Investments and Joint Ventures [Abstract]	'
Schedule of financial information for unconsolidated joint ventures	'
	The table below presents unaudited financial information, for our unconsolidated joint ventures (in thousands):
		As of		As of
		March 31,		December 31,
		2014		2013
	Current assets	$	51,023	$	55,229
	Current liabilities	30,905		30,606
		For The Three Month
		Period Ended
		March 31,
		2014		2013
	Revenue	$	32,493	$	26,506
	Gross profit	1,196		2,566
	Net income	1,086		2,275
	Net income attributable to EnergySolutions	292		676

Other_Intangible_Assets_Tables

Other Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2014
Intangible Assets, Net (Excluding Goodwill) [Abstract]	'
Schedule of other intangible assets	'
	Other intangible assets consisted of the following (in thousands):
		As of March 31, 2014						As of December 31, 2013
		Gross		Accumulated			Weighted	Gross		Accumulated			Weighted
		Carrying		Amortization			Average	Carrying		Amortization			Average
		Amount					Remaining	Amount					Remaining
							Useful Life						Useful Life
	Permits	$	243,173	$	(88,714	)	15.6 years	$	243,173	$	(86,263	)	15.8 years
	Customer relationships	124,866		(110,848		)	3.1 years	161,903		(107,718		)	4.8 years
	Technology and other	24,501		(12,657		)	5.8 years	15,490		(12,224		)	2.1 years
	Total amortizable intangibles	$	392,540	$	(212,219	)	13.6 years	$	420,566	$	(206,205	)	12.8 years

LongTerm_Debt_Tables

Long-Term Debt (Tables)	3 Months Ended
	Mar. 31, 2014
Debt Disclosure [Abstract]	'
Schedule of outstanding long-term debt	'
	Our outstanding long-term debt consists of the following (in thousands):
		March 31,			December 31,
		2014			2013
	Term loan facilities due through 2016(1)(2)	$	353,000		$	440,000
	Term loan unamortized discount	(4,013		)	(5,519		)
	Senior notes, 10.75% due through 2018	300,000			300,000
	Senior notes unamortized discount	(2,557		)	(2,667		)
	Revolving credit facility (3)	—			—
	Total debt	646,430			731,814
	Less: current portion	—			(65,000		)
	Total long-term debt	$	646,430		$	666,814
	______________________________
	-1	The variable interest rate on borrowings under our senior secured credit facility was 6.75% and 7.25% as of March 31, 2014, and December 31, 2013, respectively. Borrowings under the senior secured credit facility bear interest at a rate equal to Adjusted LIBOR plus 5.00% or ABR plus 4.00% in the case of the senior secured term loan; and Adjusted LIBOR plus 4.50%, or ABR plus 3.50% in the case of the senior secured revolving credit facility.
	-2	$202.2 million and $289.7 million of the term loan balances, for each of the periods ended March 31, 2014 and December 31, 2013, respectively, was held in a restricted cash account as collateral for the Company’s reimbursement obligations with respect to deposit letters of credit.
	-3	Includes a senior secured revolving credit facility due with availability of $105.0 million, of which $65.5 million was used to fund letters of credit issued as of March 31, 2014, with the balance being payable on August 13, 2015.
Schedule of debt instrument redemption prices	'
	Period	Redemption
		Price
	2014	105.375	%
	2015	102.688	%
	2016 and thereafter	100	%

Facility_and_Equipment_Deconta1

Facility and Equipment Decontamination and Decommissioning (Tables)	3 Months Ended
	Mar. 31, 2014
Asset Retirement Obligation Disclosure [Abstract]	'
Schedule of facility and equipment D&D liabilities	'
	Our facility and equipment D&D liabilities consist of the following (in thousands):
		March 31,			December 31,
		2014			2013
	Facilities and equipment ARO—Zion Station	$	374,848		$	409,190
	Facilities and equipment ARO—Clive, UT	27,585			28,106
	Facilities and equipment ARO—other	44,091			35,446
	Total facilities and equipment ARO	446,524			472,742
	Barnwell Closure	3,246			3,822
		449,770			476,564
	Less: current portion	(97,681		)	(98,175		)
		$	352,089		$	378,389
Rollforward of facilities and equipment ARO	'
	The following is a roll forward of our facilities and equipment ARO liabilities (in thousands):
		March 31,
		2014
	Beginning Balance as of January 1	$	472,742
	Liabilities incurred(1)	8,766
	Liabilities settled	(40,552		)
	Accretion expense	5,568
	ARO estimate adjustments	—
	Ending liability	$	446,524

Segment_Reporting_and_Business1

Segment Reporting and Business Concentrations (Tables)	3 Months Ended
	Mar. 31, 2014
Segment Reporting [Abstract]	'
Schedule of segment information	'
	he following table presents the segment information by operating group (in thousands):
		As of and for the Three Month Period Ended March 31, 2014
		Projects		Products		LP&D		International			Corporate			Consolidated
											Unallocated Items
	Revenue from external customers(1)(2)	$	62,104	$	42,175	$	51,357	$	321,157		$	—		$	476,793
	Income (loss) from operations(2)(3)(7)	2,856		9,547		7,407		(93,580		)	(15,121		)	(88,891		)
	Depreciation, amortization and accretion expense(4)	5,555		520		7,805		1,978			848			16,706
	Goodwill	40,236		17,951		208,060		—			—			266,247
	Other long-lived assets(5)	15,453		15,635		262,796		3,727			14,375			311,986
	Purchases of property, plant and equipment	—		—		757		—			401			1,158
	Total assets(6)	1,080,881		65,265		543,107		458,918			103,523			2,251,694
		As of and for the Three Month Period ended March 31, 2013
		Projects		Products		LP&D		International			Corporate			Consolidated
											Unallocated Items
	Revenue from external customers(1)(2)	$	76,916	$	21,297	$	46,808	$	381,187		$	—		$	526,208
	Income (loss) from operations(2)(3)	4,584		3,791		6,683		16,919			(17,102		)	14,875
	Depreciation, amortization and accretion expense(4)	6,659		513		7,385		1,898			945			17,400
	Goodwill	40,236		17,951		208,096		39,149			—			305,432
	Other long-lived assets(5)	17,023		17,178		254,754		44,499			13,230			346,684
	Purchases of property, plant and equipment	—		50		2,766		5			261			3,082
	Total assets(6)	1,367,047		59,739		633,854		472,173			84,703			2,617,516
	______________________
	-1	We eliminate intersegment revenue in consolidation. Intersegment revenue for the three month periods ended March 31, 2014, and 2013 was $0.7 million and $5.5 million, respectively. Revenue by segment represent revenue earned based on third-party billings to customers.
	-2	Results of our operations for services provided to our customers in Asia and Europe are included in our Products Group, and for services provided in Canada are included in our LP&D and Projects Groups.
	-3	For the three month periods ended March 31, 2014, and 2013, we recorded $0.3 million and $0.7 million, respectively of income from our unconsolidated joint ventures of which $0.1million and $0.2 million, respectively, of losses are attributable to LP&D operations; and $0.4 million and $0.9 million, respectively, of income is attributable to the Projects Group.
	-4	Depreciation, amortization and accretion expenses ("DA&A") are included in cost of revenue and SG&A expenses in the accompanying condensed consolidated statements of operations and comprehensive income (loss). DA&A expenses included in cost of revenue for the three month periods ended March 31, 2014, and 2013 were $11.5 million and $12.1 million, respectively. DA&A expenses included in SG&A for the three month periods ended March 31, 2014, and 2013, were $5.2 million and $5.3 million, respectively.
	-5	Other long-lived assets include property, plant and equipment and other intangible assets.
	-6	Corporate unallocated assets relate primarily to income tax receivables, deferred tax assets, deferred financing costs, prepaid expenses, and property, plant and equipment that benefit the entire Company and cash.
	-7	Losses from our International operations for the three month period ended March 31, 2014, included a $102.3 million non cash impairment charge related to Goodwill and the customer relationship intangible assets associated to the Magnox contract.

Pension_Plans_Tables

Pension Plans (Tables)	3 Months Ended
	Mar. 31, 2014
Compensation and Retirement Disclosure [Abstract]	'
Schedule of net periodic postretirement benefit costs	'
	Net periodic benefit costs related to the Magnox pension plan consisted of the following (in thousands):
		For The Three Month
		Period Ended
		March 31,
		2014			2013
	Service cost	$	16,552		$	14,216
	Interest cost	45,559			38,726
	Expected return on plan assets	(54,084		)	(45,290		)
	Net actuarial loss	83			78
	Total net periodic benefit costs	$	8,110		$	7,730

Restructuring_Tables

Restructuring (Tables)	3 Months Ended
	Mar. 31, 2014
Restructuring and Related Activities [Abstract]	'
Schedule of reconciliation of the beginning and ending liability balances related to the Magnox employee termination benefits	'
	The following is a reconciliation of the beginning and ending liability balances related to the Magnox employee termination benefits (in thousands):
		March 31,
		2014
	Beginning liability	$	46,728
	Additions	—
	Payments	(5,453		)
	Effect of exchange rate	398
	Ending liability	41,673
	Less current portion	(10,676		)
		$	30,997

Guarantor_and_NonGuarantor_Fin1

Guarantor and Non-Guarantor Financial Information (Tables)	3 Months Ended
	Mar. 31, 2014
Guarantor and Non-Guarantor Financial Information	'
Schedule of Condensed Consolidating Statement of Operations	'
	ing.
	CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS
	For The Three Month Period ended March 31, 2014
	(in thousands)
		Energy			Energy			Guarantor			Non-			Eliminations			Consolidated
		Solutions,			Solutions,			Subsidiaries			Guarantor
		Inc.			LLC						Subsidiaries
	Revenue	$	—		$	18,510		$	120,240		$	352,456		$	(14,413	)	$	476,793
	Cost of revenue	—			(13,923		)	(98,030		)	(335,230		)	14,413			(432,770		)
	Gross profit	—			4,587			22,210			17,226			—			44,023
	Selling, general and administrative expenses	—			(15,835		)	(9,430		)	(5,617		)	—			(30,882		)
	Impairment of goodwill and other intangible assets	—			—			—			(102,324		)	—			(102,324		)
	Equity in income of unconsolidated joint ventures	—			—			292			—			—			292
	Operating income (loss)	—			(11,248		)	13,072			(90,715		)	—			(88,891		)
	Interest expense	—			(17,187		)	—			(4,169		)	—			(21,356		)
	Income (loss) from subsidiaries	(100,913		)	(72,512		)	—			—			173,425			—
	Other, net	—			34			29,790			(18,206		)	—			11,618
	Income (loss) before income taxes	(100,913		)	(100,913		)	42,862			(113,090		)	173,425			(98,629		)
	Provision for income taxes	2,802			—			—			(2,285		)	—			517
	Net income (loss)	(98,111		)	(100,913		)	42,862			(115,375		)	173,425			(98,112		)
	Less: net loss attributable to noncontrolling interests	—			—			1			—			—			1
	Net income (loss) attributable to EnergySolutions	$	(98,111	)	$	(100,913	)	$	42,863		$	(115,375	)	$	173,425		$	(98,111	)
	Other comprehensive income (loss):
	Net income (loss)	(98,111		)	(100,913		)	42,862			(115,375		)	173,425			(98,112		)
	Foreign currency translation adjustments, net of taxes	—			—			—			840			—			840
	Change in unrecognized actuarial loss	—			—			—			(126		)	—			(126		)
	Other comprehensive income (loss)	(98,111		)	(100,913		)	42,862			(114,661		)	173,425			(97,398		)
	Less: net loss attributable to noncontrolling interests	—			—			1			—			—			1
	Comprehensive income (loss) attributable to EnergySolutions	$	(98,111	)	$	(100,913	)	$	42,863		$	(114,661	)	$	173,425		$	(97,397	)
	CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS
	For The Three Month Period ended March 31, 2013
	(in thousands)
		Energy			Energy			Guarantor			Non-			Eliminations			Consolidated
		Solutions,			Solutions,			Subsidiaries			Guarantor
		Inc.			LLC						Subsidiaries
	Revenue	$	—		$	11,275		$	96,895		$	431,052		$	(13,014	)	$	526,208
	Cost of revenue	—			(7,195		)	(80,077		)	(405,530		)	13,014			(479,788		)
	Gross profit	—			4,080			16,818			25,522			—			46,420
	Selling, general and administrative expenses	—			(17,492		)	(9,975		)	(4,754		)	—			(32,221		)
	Equity in income of unconsolidated joint ventures	—			—			676			—			—			676
	Operating income (loss)	—			(13,412		)	7,519			20,768			—			14,875
	Interest expense	—			(15,190		)	—			(3,455		)	—			(18,645		)
	Income (loss) from subsidiaries	(6,236		)	24,772			—			—			(18,536		)	—
	Other, net	—			(2,406		)	163			4,354			—			2,111
	Income (loss) before income taxes	(6,236		)	(6,236		)	7,682			21,667			(18,536		)	(1,659		)
	Benefit from (provision for) income taxes	(1,964		)	—			—			(4,575		)	—			(6,539		)
	Net income (loss)	(8,200		)	(6,236		)	7,682			17,092			(18,536		)	(8,198		)
	Less: net income attributable to noncontrolling interests	—			—			—			(2		)	—			(2		)
	Net income (loss) attributable to EnergySolutions	$	(8,200	)	$	(6,236	)	$	7,682		$	17,090		$	(18,536	)	$	(8,200	)
	Other comprehensive income (loss):
	Net income (loss)	(8,200		)	(6,236		)	7,682			17,092			(18,536		)	(8,198		)
	Foreign currency translation adjustments, net of taxes	—			—			—			(8,687		)	—			(8,687		)
	Change in unrecognized actuarial gain	—			—			—			(478		)	—			(478		)
	Other comprehensive income (loss)	(8,200		)	(6,236		)	7,682			7,927			(18,536		)	(17,363		)
	Less: net income attributable to noncontrolling interests	—			—			—			(2		)	—			(2		)
	Comprehensive income (loss) attributable to EnergySolutions	$	(8,200	)	$	(6,236	)	$	7,682		$	7,925		$	(18,536	)	$	(17,365	)
Schedule of Condensed Consolidating Balance Sheet	'
	CONDENSED CONSOLIDATING BALANCE SHEET
	As of March 31, 2014
	(in thousands)
		Energy			Energy			Guarantor			Non-			Eliminations			Consolidated
		Solutions,			Solutions,			Subsidiaries			Guarantor
		Inc.			LLC						Subsidiaries
	Assets
	Cash and cash equivalents	$	—		$	39,487		$	4,643		$	21,449		$	—		$	65,579
	Accounts receivable, net of allowance for doubtful accounts	—			10,769			53,570			277,343			(1,144		)	340,538
	Costs and estimated earnings in excess of billings on uncompleted contracts	—			9,080			40,701			28,234			(2,746		)	75,269
	Nuclear decommissioning trust fund investments, current portion	—			—			—			110,359			—			110,359
	Deferred costs, current portion	—			—			7,873			93,319			—			101,192
	Other current assets	—			9,405			5,393			807			—			15,605
	Total current assets	—			68,741			112,180			531,511			(3,890		)	708,542
	Property, plant and equipment, net	—			74,975			54,860			1,830			—			131,665
	Goodwill	—			35,769			228,116			2,362			—			266,247
	Intangibles, net	—			155,398			21,744			3,179			—			180,321
	Restricted cash	—			1,924			3,245			200,661			—			205,830
	Nuclear decommissioning trust fund	—			—			—			312,132			—			312,132
	Deferred Income Taxes	28,023			—			—			—			—			28,023
	Deferred costs less current portion	—			—			—			241,029			—			241,029
	Investment in subsidiaries	(165,294		)	620,690			—			—			(455,396		)	—
	Intercompany receivable	337,082			—			198,794			10,625			(546,501		)	—
	Other long term assets	—			8,839			18,553			150,513			—			177,905
	TOTAL ASSETS	$	199,811		$	966,336		$	637,492		$	1,453,842		$	(1,005,787	)	$	2,251,694
	Liabilities and Equity
	Intercompany payable	$	—		$	—		$	3,775		$	10,509		$	(14,284	)	$	—
	Deferred income taxes	29,085			—			—			—			—			29,085
	Accounts payable	—			4,587			7,283			140,195			—			152,065
	Accrued expenses and other current liabilities	—			74,171			20,912			176,269			(964		)	270,388
	Unearned revenue, current portion	—			12,496			28,763			93,055			850			135,164
	Facility and equipment decontamination and decommissioning	—			—			—			97,681			—			97,681
	Total current liabilities	29,085			91,254			60,733			517,709			(14,398		)	684,383
	Intercompany loan payable	—			535,993			—			—			(535,993		)	—
	Long-term debt, less current portion	—			448,657			—			197,773			—			646,430
	Facility and equipment decontamination and decommissioning liabilities, current portion	—			38,664			36,241			277,184			—			352,089
	Unearned revenue, less current portion	—			—			—			243,803			—			243,803
	Other liabilities, net	(677		)	17,062			1,335			135,379			—			153,099
	Equity	171,403			(165,294		)	539,183			81,507			(455,396		)	171,403
	Noncontrolling interests	—			—			—			487			—			487
	TOTAL LIABILITIES AND EQUITY	$	199,811		$	966,336		$	637,492		$	1,453,842		$	(1,005,787	)	$	2,251,694
	CONDENSED CONSOLIDATING BALANCE SHEET
	As of December 31, 2013
	(in thousands)
		Energy			Energy			Guarantor			Non-			Eliminations			Consolidated
		Solutions,			Solutions,			Subsidiaries			Guarantor
		Inc.			LLC						Subsidiaries
	Assets
	Cash and cash equivalents	$	—		$	33,556		$	872		$	49,785		$	—		$	84,213
	Accounts receivable, net of allowance for doubtful accounts	—			13,793			47,034			229,138			(2,527		)	287,438
	Costs and estimated earnings in excess of billings on uncompleted contracts	—			9,884			41,993			36,820			(2,732		)	85,965
	Nuclear decommissioning trust fund investments, current portion	—			—			—			112,475			—			112,475
	Deferred costs, current portion	—			—			333			91,508			—			91,841
	Other current assets	—			6,548			4,402			4,918			—			15,868
	Total current assets	—			63,781			94,634			524,644			(5,259		)	677,800
	Property, plant and equipment, net	—			52,149			60,269			2,058			—			114,476
	Goodwill	—			29,764			223,506			56,238			—			309,508
	Intangibles, net	—			151,580			21,210			41,571			—			214,361
	Restricted cash	—			89,537			3,821			200,538			—			293,896
	Nuclear decommissioning trust fund	—			—			—			330,442			—			330,442
	Deferred Income Taxes	29,707			—			—			—			—			29,707
	Deferred costs less current portion	—			—			—			270,039			—			270,039
	Investment in subsidiaries	(65,095		)	693,474			—			—			(628,379		)	—
Intercompany receivable	333,300			—			193,465			8,997			(535,762		)	—
Other long term assets	—			11,275			17,955			151,084			—			180,314
TOTAL ASSETS	$	297,912		$	1,091,560		$	614,860		$	1,585,611		$	(1,169,400	)	$	2,420,543
Liabilities and Stockholders’ Equity
Intercompany payable	$	—		$	—		$	5,215		$	22,626		$	(27,841	)	$	—
Accounts payable	—			5,198			16,027			124,632			—			145,857
Accrued expenses and other current liabilities	477			56,788			35,075			116,306			(469		)	208,177
Unearned revenue, current portion	—			2,229			23,296			92,515			425			118,465
Facility and equipment decontamination and decommissioning	—			—			—			98,175			—			98,175
Other current liabilities	19,261			65,000			—			11,102			—			95,363
Total current liabilities	19,738			129,215			79,613			465,356			(27,885		)	666,037
Intercompany loan payable	—			513,136			—			—			(513,136		)	—
Long-term debt, less current portion	—			469,260			—			197,554			—			666,814
Facility and equipment decontamination and decommissioning liabilities, current portion	—			30,375			36,981			311,033			—			378,389
Unearned revenue, less current portion	—			0			—			272,940			—			272,940
Other liabilities, net	10,447			14,669			1,944			141,088			—			168,148
Stockholders’ equity	267,727			(65,095		)	496,322			197,152			(628,379		)	267,727
Noncontrolling interests	—			—			—			488			—			488
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$	297,912		$	1,091,560		$	614,860		$	1,585,611		$	(1,169,400	)	$	2,420,543
Schedule of Condensed Cash Flow Statement	'
	CONDENSED CONSOLIDATING STATEMENT OF CASH FLOW
	For The Three Month Period Ended March 31, 2014
	(in thousands)
		Energy			Energy			Guarantor			Non-			Eliminations			Consolidated
		Solutions,			Solutions,			Subsidiaries			Guarantor
		Inc.			LLC						Subsidiaries
	Cash flow from operating activities
	Net cash provided by (used in) operating activities	$	(95,463	)	$	(68,072	)	$	12,213		$	(29,504	)	$	182,661		$	1,835
	Cash flow from investing activities
	Purchases of property, plant and equipment	—			(1,180		)	—			22			—			(1,158		)
	Purchase of investments in nuclear decommissioning trust fund	—			—			—			(135,712		)	—			(135,712		)
	Proceeds from sales of nuclear decommissioning trust fund investments	—			—			—			136,745			—			136,745
	Acquisition of business, net of cash acquired	—			(20,996		)	—			—			—			(20,996		)
	Proceeds from sales of property, plant and equipment	—			66			—			—			—			66
	Net cash provided by (used in) investing activities	—			(22,110		)	—			1,055			—			(21,055		)
	Cash flows from financing activities
	Intercompany loan receivable	(4,736		)	—			(8,442		)	—			13,178			—
	Intercompany loan payable	—			22,797			—			—			(22,797		)	—
	Investment in subsidiary	100,199			72,843			—			—			(173,042		)	—
	Repayments of long term debt	—			(87,000		)	—			—			—			(87,000		)
	Restricted cash held as collateral of letter of credit obligations	—			87,681			—			—			—			87,681
	Repayments of capital lease obligations	—			(208		)	—			—			—			(208		)
	Net cash provided by (used in) financing activities	95,463			96,113			(8,442		)	—			(182,661		)	473
	Effect of exchange rate on cash	—			—			—			113			—			113
	Net increase (decrease) in cash and cash equivalents	—			5,931			3,771			(28,336		)	—			(18,634		)
	Cash and cash equivalents, beginning of period	—			33,556			872			49,785			—			84,213
	Cash and cash equivalents, end of period	$	—		$	39,487		$	4,643		$	21,449		$	—		$	65,579
	CONDENSED CONSOLIDATING STATEMENT OF CASH FLOW
	For The Three Month Period Ended March 31, 2013
	(in thousands)
		Energy			Energy			Guarantor			Non-			Eliminations			Consolidated
		Solutions,			Solutions,			Subsidiaries			Guarantor
		Inc.			LLC						Subsidiaries
	Cash flow from operating activities
	Net cash provided by (used in) operating activities	$	(10,470	)	$	(9,127	)	$	(2,201	)	$	3,701		$	(2,229	)	$	(20,326	)
	Cash flow from investing activities
	Purchase of investments in nuclear decommissioning trust fund	—			—			—			(188,286		)	—			(188,286		)
	Proceeds from sales of nuclear decommissioning trust fund investments	—			—			—			189,367			—			189,367
	Purchases of property, plant and equipment	—			(942		)	(2,131		)	(9		)	—			(3,082		)
	Net cash provided by (used in) investing activities	—			(942		)	(2,131		)	1,072			—			(2,001		)
	Cash flows from financing activities
	Intercompany loan receivable	(4,499		)	—			6,249			—			(1,750		)	—
	Intercompany loan payable	—			(2,413		)	(1,514		)	—			3,927			—
	Investment in subsidiary	15,400			(15,452		)	—			—			52			—
	Repayments of long term debt	—			(16,592		)	—			—			—			(16,592		)
	Debt financing fees	—			(1,960		)	—			(1,200		)	—			(3,160		)
	Dividend: minority interest	—			—			—			—			—			—
	Proceeds from issuance of common stock	—			—			—			—			—			—
	Minimum tax withholding on restricted stock awards	(431		)	—			—			—			—			(431		)
	Repayments of capital lease obligations	—			(211		)	—			—			—			(211		)
	Net cash provided by (used in) financing activities	10,470			(36,628		)	4,735			(1,200		)	2,229			(20,394		)
	Effect of exchange rate on cash	—			—			(23		)	(1,022		)	—			(1,045		)
	Net increase (decrease) in cash and cash equivalents	—			(46,697		)	380			2,551			—			(43,766		)
	Cash and cash equivalents, beginning of period	—			93,080			3,371			37,740			—			134,191
	Cash and cash equivalents, end of period	$	—		$	46,383		$	3,751		$	40,291		$	—		$	90,425

Description_of_Business_Detail

Description of Business (Details)	3 Months Ended
	Mar. 31, 2014
	group
Description of Business	'
Number of major operating groups	4
Clive, UT	'
Description of Business	'
Number of facilities	1
Barnwell, South Carolina	'
Description of Business	'
Number of facilities	2
Tennessee	'
Description of Business	'
Number of facilities	4
Brampton, Canada [Member]	'
Description of Business	'
Number of facilities	1

Business_Combinations_Details

Business Combinations (Details) (USD $)

Mar. 31, 2014

24-May-13

24-May-13

24-May-13

24-May-13

24-May-13

24-May-13

Mar. 04, 2014

24-May-13

24-May-13

24-May-13

Mar. 04, 2014

In Millions, except Per Share data, unless otherwise specified

Senior notes due 2018

Energy Solutions Inc.

Energy Solutions Inc.

Energy Solutions Inc.

Energy Solutions Inc.

Energy Solutions Inc.

Energy Solutions Inc.

Studsvik, Inc. [Member]

Rockwell Holdco, Inc

Rockwell Holdco, Inc

Rockwell Holdco, Inc

Sempra Safe LLC [Member]

Common Stock

Employee incentives and related payroll taxes

Professional Fee [Member]

Lead Arranger Banker Fees [Member]

Directors and Officers Liability Insurance [Member]

Energy Solutions Inc.

Energy Solutions Inc.

Energy Solutions Inc.

Studsvik, Inc. [Member]

Amount paid on behalf of acquiree

Amount capitalized as debt issuance cost

Business Acquisition [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Conversion price of shares (in dollars per share)

'

'

'

'

'

'

'

'

$4.15

'

'

'

Interest rate on senior notes

10.75%

'

'

'

'

'

'

'

'

'

'

'

Payments for Repurchase of Common Stock

'

$383.90

'

'

'

'

'

'

'

'

'

'

Stock repurchased during period (in shares)

'

'

1.8

'

'

'

'

'

'

'

'

'

Stock repurchased during period

'

'

7.3

'

'

'

'

'

'

'

'

'

Merger transaction related costs paid

'

'

'

'

'

'

'

'

'

10.9

3.1

'

Merger transaction related costs expensed

'

49.2

'

26.9

13.4

6.9

2

0.4

'

'

'

'

Equity Method Investment, Ownership Percentage

'

'

'

'

'

'

'

'

'

'

'

49.00%

Payments to Acquire Businesses, Gross

'

'

'

'

'

'

'

$22.50

'

'

'

'

Business_Combinations_Business1

Business Combinations Business Combinations (Assets Acquired and Liabilities Assumed) (Details) (Studsvik, Inc. [Member], USD $)	Mar. 04, 2014
In Thousands, unless otherwise specified
Studsvik, Inc. [Member]	'
Business Acquisition [Line Items]	'
Cash	$1,461
Accounts receivables	5,123
Costs and estimated earnings in excess of billings on uncompleted contracts	3,152
Other current assets	1,065
Intangible assets	9,011
Property, plant and equipment	20,595
Accounts payable	-3,419
Accrued expenses and other current liabilities	-4,047
Unearned revenue	-1,718
Asset retirement obligations	-8,766
Total purchase price allocated	$22,457

Basis_of_Presentation_Details

Basis of Presentation (Details)	3 Months Ended
	Mar. 31, 2014
	venture
Basis of Presentation	'
Number of minority-owned joint ventures consolidated	1

Trust_Fund_Investments_Details

Trust Fund Investments (Details) (USD $)	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Dec. 31, 2013
Investments	'		'		'
Total assets	$2,251,694,000	[1]	$2,617,516,000	[1]	$2,420,543,000
Total liabilities, amortized cost	-2,079,804,000		'		-2,152,328,000
Less: current portion	-110,359,000		'		-112,475,000
Nuclear decommissioning trust fund investments	312,132,000		'		330,442,000
Additional disclosures	'		'		'
Nuclear decommissioning trust fund	32,938,000		38,289,000		'
NDT fund	'		'		'
Assets	'		'		'
Receivables for securities sold	5,218,000		'		4,568,000
Investments	'		'		'
Investments, amortized cost	400,657,000		'		425,034,000
Investments, gross unrealized gains	21,346,000		'		20,377,000
Investments, gross unrealized losses	-3,434,000		'		-7,062,000
Investments, estimated fair value	418,569,000		'		438,349,000
Total assets	405,875,000		'		429,602,000
Assets, gross unrealized gains	21,346,000		'		20,377,000
Assets, gross unrealized losses	-3,434,000		'		-7,062,000
Total assets, estimated fair value	423,787,000		'		442,917,000
Payables to Broker-Dealers and Clearing Organizations	-1,296,000		'		'
Total liabilities, amortized cost	-1,296,000		'		'
Net assets held by the NDT fund, amortized cost	404,579,000		'		429,602,000
Net assets held by the NDT fund, gross unrealized gains	21,346,000		'		20,377,000
Net assets held by the NDT fund, gross unrealized losses	-3,434,000		'		-7,062,000
Net assets held by the NDT fund	422,500,000		'		442,900,000
Additional disclosures	'		'		'
Nuclear decommissioning trust fund	32,900,000		38,300,000		'
Payments for Brokerage Fees	1,000,000		1,100,000		'
Unrealized (losses) gains resulting from adjustments to the fair value of the NDT fund investments	-4,600,000		6,000,000		'
Realized gains related to sales of investments, dividends and interest payments received from investments held by the NDT fund	8,500,000		11,300,000		'
NDT fund | Corporate debt securities	'		'		'
Investments	'		'		'
Investments, amortized cost	167,594,000		'		201,377,000
Investments, gross unrealized gains	9,279,000		'		8,050,000
Investments, gross unrealized losses	-518,000		'		-2,352,000
Investments, estimated fair value	176,355,000		'		207,075,000
NDT fund | Equity securities	'		'		'
Investments	'		'		'
Investments, amortized cost	200,000		'		400,000
Investments, gross unrealized gains	14,000		'		13,000
Investments, gross unrealized losses	0		'		0
Investments, estimated fair value	214,000		'		413,000
NDT fund | Direct lending securities	'		'		'
Investments	'		'		'
Investments, amortized cost	138,436,000		'		134,161,000
Investments, gross unrealized gains	10,420,000		'		11,476,000
Investments, gross unrealized losses	-2,479,000		'		-3,387,000
Investments, estimated fair value	146,377,000		'		142,250,000
NDT fund | Debt securities issued by states of the U.S.	'		'		'
Investments	'		'		'
Investments, amortized cost	20,660,000		'		23,725,000
Investments, gross unrealized gains	1,121,000		'		761,000
Investments, gross unrealized losses	-120,000		'		-468,000
Investments, estimated fair value	21,661,000		'		24,018,000
NDT fund | Cash and cash equivalents	'		'		'
Investments	'		'		'
Investments, amortized cost	49,390,000		'		29,686,000
Investments, estimated fair value	49,390,000		'		29,686,000
NDT fund | Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	'		'		'
Investments	'		'		'
Investments, amortized cost	24,377,000		'		35,685,000
Investments, gross unrealized gains	512,000		'		77,000
Investments, gross unrealized losses	-317,000		'		-855,000
Investments, estimated fair value	24,572,000		'		34,907,000
NDT fund | Estimated fair value	'		'		'
Assets	'		'		'
Receivables for securities sold	5,218,000		'		4,568,000
Investments	'		'		'
Payables to Broker-Dealers and Clearing Organizations	-1,296,000		'		'
Total liabilities, estimated fair value	-1,296,000		'		'
Net assets held by the NDT fund	422,491,000		'		442,917,000
Less: current portion	-110,359,000		'		-112,475,000
Nuclear decommissioning trust fund investments	$312,132,000		'		$330,442,000
Minimum | NDT fund	'		'		'
Trust Fund Investments	'		'		'
Collateral Levels as Percentage of Market Value of Borrowed Securities for Collateral Denominated in US Currency	'		102.00%		'
Additional disclosures	'		'		'
Collateral Levels as Percentage of Market Value of Borrowed Securities for Collateral Denominated in Foreign Currency	'		105.00%		'
[1]	Corporate unallocated assets relate primarily to income tax receivables, deferred tax assets, deferred financing costs, prepaid expenses, and property, plant and equipment that benefit the entire Company and cash

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Fair market value | Revolving credit facility	'	'
Fair market value and carrying value	'	'
Debt	$356.10	$444.40
Fair market value | Senior notes	'	'
Fair market value and carrying value	'	'
Debt	317.8	320.2
Carrying value | Revolving credit facility	'	'
Fair market value and carrying value	'	'
Debt	353	440
Carrying value | Senior notes	'	'
Fair market value and carrying value	'	'
Debt	$300	$300

Fair_Value_Measurements_Detail1

Fair Value Measurements (Details 2) (NDT fund, USD $)	Mar. 31, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Assets	'		'
Receivables for securities sold	$5,218		$4,568
Investments	418,569		438,349
Total assets, estimated fair value	423,787		442,917
Payables to Broker-Dealers and Clearing Organizations	-1,296		'
Net assets held by the NDT fund	422,500		442,900
Cash and cash equivalents	'		'
Assets	'		'
Investments	49,390		29,686
Equity securities	'		'
Assets	'		'
Investments	214		413
Direct lending securities	'		'
Assets	'		'
Investments	146,377		142,250
Total Investments at Fair Value	'		'
Assets	'		'
Receivables for securities sold	5,218		4,568
Investments	418,569		438,349
Total assets, estimated fair value	423,787		442,917
Payables to Broker-Dealers and Clearing Organizations	-1,296		'
Total liabilities, estimated fair value	-1,296		'
Net assets held by the NDT fund	422,491		442,917
Total Investments at Fair Value | Cash and cash equivalents	'		'
Assets	'		'
Investments	49,390		29,686
Total Investments at Fair Value | Fixed income securities	'		'
Assets	'		'
Investments	222,588	[1]	266,000	[1]
Total Investments at Fair Value | Equity securities	'		'
Assets	'		'
Investments	214	[2]	413	[2]
Total Investments at Fair Value | Direct lending securities	'		'
Assets	'		'
Investments	146,377	[3]	142,250	[3]
Quoted Prices in Active Markets for Identical Assets Level 1	'		'
Assets	'		'
Receivables for securities sold	5,218		4,568
Investments	74,176		65,006
Total assets, estimated fair value	79,394		69,574
Payables to Broker-Dealers and Clearing Organizations	-1,296		'
Total liabilities, estimated fair value	-1,296		'
Net assets held by the NDT fund	78,098		69,574
Quoted Prices in Active Markets for Identical Assets Level 1 | Cash and cash equivalents	'		'
Assets	'		'
Investments	49,390		29,686
Quoted Prices in Active Markets for Identical Assets Level 1 | Fixed income securities	'		'
Assets	'		'
Investments	24,572	[1]	34,907	[1]
Quoted Prices in Active Markets for Identical Assets Level 1 | Equity securities	'		'
Assets	'		'
Investments	214	[2]	413	[2]
Significant Other Observable Inputs Level 2	'		'
Assets	'		'
Investments	198,016		231,093
Total assets, estimated fair value	198,016		231,093
Net assets held by the NDT fund	198,016		231,093
Significant Other Observable Inputs Level 2 | Fixed income securities	'		'
Assets	'		'
Investments	198,016	[1]	231,093	[1]
Significant Unobservable Inputs Level 3	'		'
Assets	'		'
Investments	146,377		142,250
Total assets, estimated fair value	146,377		142,250
Net assets held by the NDT fund	146,377		142,250
Significant Unobservable Inputs Level 3 | Direct lending securities	'		'
Assets	'		'
Investments	$146,377	[3]	$142,250	[3]
[1]	For fixed income securities, multiple prices from pricing services are obtained from pricing vendors whenever possible, which enables cross- provider validations in addition to checks for unusual daily movements. A primary price source is identified based on asset type, class or issue for each security. The trustee monitors prices supplied by pricing services and may use a supplemental price source or change the primary price source of a given security if the portfolio managers challenge an assigned price and the trustee determines that another price source is considered to be preferable. U.S. Treasury securities are categorized as Level 1 because they trade in a highly liquid and transparent market. Investments with maturities of three months or less when purchased, including certain short-term fixed income securities, are considered cash equivalents and are also categorized as Level 1. The fair values of fixed income securities, excluding U.S. Treasury securities, are based on evaluated prices that reflect observable market information, such as actual trade information or similar securities, adjusted for observable differences and are categorized in Level 2.
[2]	With respect to individually held equity securities, the trustee obtains prices from pricing services, whose prices are obtained from direct feeds from market exchanges. The fair values of equity securities held directly by the trust fund are based on quoted prices in active markets and are categorized in Level 1. Equity securities held individually are primarily traded on the New York Stock Exchange and NASDAQ Global Select Market, which contain only actively traded securities due to the volume trading requirements imposed by these national securities exchanges.
[3]	Direct lending securities are investments in managed funds that invest in private companies for long-term capital appreciation. The fair value of these securities is determined using either an enterprise value model or a bond valuation model. The enterprise value model develops valuation estimates based on valuations of comparable public companies, recent sales of private and public companies, discounting the forecasted cash flows of the portfolio company, estimating the liquidation or collateral value of the portfolio company or its assets, considering offers from third parties to buy the portfolio company, its historical and projected financial results, as well as other factors that may impact value. Significant judgment is required in the applications of discounts or premiums applied to the prices of comparable companies for factors such as size, marketability and relative performance. Under the bond valuation model, expected future cash flows are discounted using a discount rate. The discount rate is composed of a market based rate for similar credits in the public market and an internal credit rate based on the underlying risk of the credit. Investments in direct lending funds are categorized as Level 3 because the fair value of these securities is based largely on inputs that are unobservable and also utilize complex valuation models. Investments in direct lending securities typically cannot be redeemed until maturity of the term loan.Management determines the value of Level 3 investments by considering third party valuations and have concluded that quantitative information about significant unobservable inputs used in valuing these investments is not reasonably available. This includes information regarding the sensitivity of the fair values to changes in the unobservable inputs. We obtain annual valuations from the fund managers and gain an understanding of the inputs and assumptions used in preparing the valuations. We also conclude on the reasonableness of the fair value of these investments. We obtain quarterly reports from the fund managers and review for consistency and reasonableness with regards to the valuations of these investments that were analyzed at the most recent year-end.

Fair_Value_Measurements_Detail2

Fair Value Measurements (Details 3) (Direct lending securities, NDT fund, USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
Direct lending securities | NDT fund	'	'	'
Rollforward for Level 3 assets and liabilities measured at fair value on a recurring basis	'	'	'
Beginning balance	$142,250	$102,443	$117,858
Purchases and issuances	17,074	17,351	'
Sales, dispositions and settlements	-12,802	-5,094	'
Realized gains and losses	4	46	'
Change in unrealized gains and losses	-149	3,112	'
Ending balance	$146,377	$142,250	$117,858

Joint_Ventures_Details

Joint Ventures (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Mar. 04, 2014
	group		Unconsolidated joint ventures	Unconsolidated joint ventures	Unconsolidated joint ventures	Studsvik, Inc. [Member]
						Sempra Safe LLC [Member]
Equity Method Investments and Joint Ventures [Abstract]	'	'	'	'	'	'
Number of groups into which joint ventures are classified	2	'	'	'	'	'
Joint Ventures	'	'	'	'	'	'
Current assets	'	'	$51,023,000	'	$55,229,000	'
Current liabilities	'	'	30,905,000	'	30,606,000	'
Revenue	'	'	32,493,000	26,506,000	'	'
Gross profit	'	'	1,196,000	2,566,000	'	'
Net income	'	'	1,086,000	2,275,000	'	'
Net income attributable to EnergySolutions	292,000	676,000	292,000	676,000	'	'
Equity Method Investments	'	'	6,500,000	'	6,100,000	'
Proceeds in cash dividend distributions from unconsolidated joint ventures	'	'	$2,200,000	$0	'	'
Equity Method Investment, Ownership Percentage	'	'	'	'	'	49.00%

Goodwill_Details

Goodwill (Details) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2012	Mar. 31, 2013
Goodwill [Line Items]	'	'	'
Discounted Future Cash Flows Relating to Entity's Business Segment Fair Value Calculated as Per Plan and Projections as Basis for Future Cash Flows	'	'5 years	'
Fair Value Inputs Residual Growth Rate	'	2.50%	'
Discount rate (as a percent)	'	17.00%	'
Goodwill [Roll Forward]	'	'	'
Gross Carrying Amount, Beginning Balance	$526,334	'	'
Foreign Currency Translation, Beginning Balance	-7,826	'	'
Accumulated Impairment Losses, Beginning Balance	-209,000	'	'
Goodwill, Beginning Balance	309,508	'	305,432
Gain (losses) recorded on translation related to goodwill denominated in foreign currencies	171	'	'
Goodwill, Acquisition	0	'	'
Goodwill, Impairment, Foreign Currency Translation	7,236	'	'
Goodwill, Impairment, Gross	-50,668	'	'
Goodwill, Impairment	-43,432	'	'
Goodwill, Ending Balance	266,247	'	305,432
Accumulated Impairment Losses, Ending Balance	-259,668	'	'
Foreign Currency Translation, Ending Balance	-419	'	'
Gross Carrying Amount, Ending Balance	526,334	'	'
International	'	'	'
Goodwill [Roll Forward]	'	'	'
Goodwill, Beginning Balance	'	'	39,149
Goodwill, Impairment, Foreign Currency Translation	7,400	'	'
Goodwill, Impairment, Gross	50,900	'	'
Goodwill, Ending Balance	$0	'	$39,149

Other_Intangible_Assets_Detail

Other Intangible Assets (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Other Intangible Assets	'	'	'
Gross Carrying Amount	$392,540,000	'	$420,566,000
Accumulated Amortization	-212,219,000	'	-206,205,000
Weighted Average Remaining Useful Life	'13 years 7 months 0 days	'	'12 years 9 months 0 days
Amortization expense	6,600,000	6,400,000	'
Foreign currency translation adjustments to AOCIL	-840,000	8,687,000	'
Permits	'	'	'
Other Intangible Assets	'	'	'
Gross Carrying Amount	243,173,000	'	243,173,000
Accumulated Amortization	-88,714,000	'	-86,263,000
Weighted Average Remaining Useful Life	'15 years 7 months 18 days	'	'15 years 9 months 0 days
Customer relationships	'	'	'
Other Intangible Assets	'	'	'
Gross Carrying Amount	124,866,000	'	161,903,000
Accumulated Amortization	-110,848,000	'	-107,718,000
Weighted Average Remaining Useful Life	'3 years 1 month 6 days	'	'4 years 9 months 0 days
Technology and other	'	'	'
Other Intangible Assets	'	'	'
Gross Carrying Amount	24,501,000	'	15,490,000
Accumulated Amortization	-12,657,000	'	-12,224,000
Weighted Average Remaining Useful Life	'5 years 10 months 6 days	'	'2 years 1 month 6 days
Magnox Site [Member] | Customer relationships	'	'	'
Other Intangible Assets	'	'	'
Gross Carrying Amount	39,800,000	'	'
Impairment charge	36,700,000	'	'
Foreign currency translation adjustments to AOCIL	$18,000,000	'	'

LongTerm_Debt_Details

Long-Term Debt (Details) (USD $)

3 Months Ended

12 Months Ended

0 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

3 Months Ended

12 Months Ended

0 Months Ended

3 Months Ended

12 Months Ended

0 Months Ended

Mar. 31, 2014

Mar. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Aug. 13, 2010

Mar. 31, 2014

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Mar. 31, 2013

Dec. 31, 2013

Aug. 13, 2010

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Dec. 31, 2013

Dec. 31, 2013

Feb. 15, 2013

Aug. 13, 2010

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Oct. 15, 2013

Oct. 15, 2013

Mar. 31, 2014

Feb. 15, 2013

Mar. 31, 2014

Dec. 31, 2013

Term loan facilities due through 2016

Term loan facilities due through 2016

Term loan facilities due through 2016

Term loan facilities due through 2016

Term loan facilities due through 2016

Revolving credit facility

Revolving credit facility

Senior secured credit facility

Senior secured credit facility

Senior secured credit facility

Senior secured credit facility

Senior secured credit facility

Senior secured credit facility

Senior secured credit facility

Senior secured credit facility

Senior secured credit facility

Senior secured credit facility

Senior secured credit facility

Senior secured credit facility

Loan Amendment

Senior notes

Senior notes

Senior notes

Senior notes

Senior notes

Senior notes

Rockwell Holdco, Inc

Rockwell Holdco, Inc

NDT fund

NDT fund

Third Loan Amendment

Third Loan Amendment

Third Loan Amendment

Third Loan Amendment

Senior notes due 2018

Senior notes due 2018

Adjusted LIBOR

ABR

Required

Actual

Minimum

Minimum

Maximum

Maximum

Adjusted LIBOR

ABR

Prior to August 15, 2014

Twelve month period commencing on August 15, 2014

Twelve month period commencing on August 15, 2015

Twelve month period commencing on August 15, 2016 and thereafter

Senior secured credit facility

Senior secured credit facility

Senior secured credit facility

Senior Debt

Senior Debt

Senior Debt

Senior notes

Senior notes

Period from quarter ended September 30, 2014 through the maturity date

Required

Required

July 1, 2013 through September 30, 2014 [Member]

Long-Term Debt

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term debt, gross

'

'

'

'

'

$353,000,000

[1],[2]

$440,000,000

[1],[2]

'

'

$0

[3]

$0

[3]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$653,000,000

'

$300,000,000

$300,000,000

Unamortized discount

'

'

'

'

'

-4,013,000

-5,519,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-2,557,000

-2,667,000

Interest rate (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

10.75%

'

'

'

'

'

'

'

'

'

'

'

'

'

10.75%

10.75%

Total debt

646,430,000

'

'

731,814,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Less: current portion

0

'

'

-65,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term debt, less current portion

646,430,000

'

'

666,814,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Variable interest rate on borrowings (as a percent)

'

'

'

'

'

6.75%

7.25%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Aggregate principal amount

'

'

'

'

560,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Discount rate (as a percent)

'

'

17.00%

'

2.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.30%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum borrowing capacity under credit facility

'

'

'

'

'

'

'

'

'

'

'

'

'

'

105,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Borrowings held in a restricted cash account as collateral for the reimbursement obligations with respect to letters of credit

'

'

'

'

'

202,200,000

289,700,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Amount used to fund letters of credit issued

'

'

'

'

'

'

'

'

'

'

'

65,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Prepayment premium

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Period for refinancing of debt instrument following the execution date of the loan amendment

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'1 year

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Payment of debt financing fees

0

3,160,000

'

'

'

'

'

'

'

'

'

'

3,200,000

7,600,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3,100,000

'

'

'

'

'

'

'

'

Payments of lead arranger banker fees

'

'

'

'

'

'

'

'

'

'

'

2,700,000

'

8,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4,300,000

'

'

'

'

'

'

'

'

'

Variable rate basis

'

'

'

'

'

'

'

'LIBOR

'ABR

'

'

'

'

'

'

'

'

'

'

'

'

'LIBOR

'ABR

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Basis spread on variable rate basis (as a percent)

'

'

'

'

'

'

'

5.00%

4.00%

'

'

'

'

'

'

'

'

'

'

'

'

4.50%

3.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Consolidated leverage ratio for mandatory prepayment under the credit facility's covenants

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.96

'

'

'

4

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Repayments of long-term debt

87,000,000

16,592,000

'

'

'

'

'

'

'

'

'

87,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Annual reduction in consolidated leverage ratio under the covenants

'

'

'

'

'

'

'

'

'

'

'

0.25

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Consolidated cash interest coverage ratio

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.25

2.41

'

2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Annual capital expenditure permitted under the covenants

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

40,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Carryforward period of the unused amount from the previous fiscal year

'

'

'

'

'

'

'

'

'

'

'

'1 year

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of the amount permitted for capital expenditures in previous fiscal year by which annual capital expenditure can be increased

'

'

'

'

'

'

'

'

'

'

'

50.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Outstanding aggregate principal amount required for applicability of cross-default provisions

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Capital expenditures

1,158,000

3,082,000

'

'

'

'

'

'

'

'

'

1,200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net assets held by the NDT fund

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

422,500,000

442,900,000

'

'

'

'

'

'

Borrowings through private offering

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

300,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Redemption price of the debt instrument if redeemed with the proceeds of certain public equity offerings as a percentage of principal amount

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

Redemption price of debt instrument as a percentage of principal amount

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

105.38%

102.69%

100.00%

'

'

'

'

'

'

'

'

'

'

Purchase price at which debt may be required to be purchased as a percentage of principal amount

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

101.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Cash interest payments

23,600,000

25,200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Payment term period after third loan amendment

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'270 days

'

'

'

'

Maximum amount outstanding threshold on specified debt after period from amendment effective date

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$675,000,000

'

'

Decrease in applicable margin per amendment upon reduction of debt to threshold

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.50%

'

'

'

'

'

[1]

$202.2 million and $289.7 million of the term loan balances, for each of the periods ended March 31, 2014 and December 31, 2013, respectively, was held in a restricted cash account as collateral for the Company’s reimbursement obligations with respect to deposit letters of credit.

[2]

The variable interest rate on borrowings under our senior secured credit facility was 6.75% and 7.25% as of March 31, 2014, and December 31, 2013, respectively. Borrowings under the senior secured credit facility bear interest at a rate equal to Adjusted LIBOR plus 5.00% or ABR plus 4.00% in the case of the senior secured term loan; and Adjusted LIBOR plus 4.50%, or ABR plus 3.50% in the case of the senior secured revolving credit facility.

[3]

Includes a senior secured revolving credit facility due with availability of $105.0 million, of which $65.5 million was used to fund letters of credit issued as of March 31, 2014, with the balance being payable on August 13, 2015.

Facility_and_Equipment_Deconta2

Facility and Equipment Decontamination and Decommissioning (Details) (USD $)	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013	Dec. 31, 2013
Facility and Equipment Decontamination and Decommissioning	'		'	'
Facility and equipment decontamination and decommissioning liabilities	$449,770,000		'	$476,564,000
Facility and equipment decontamination and decommissioning liabilities, current portion	-97,681,000		'	-98,175,000
Facility and equipment decontamination and decommissioning liabilities	352,089,000		'	378,389,000
Reconciliation of facility and equipment ARO	'		'	'
Beginning balance	472,742,000		'	'
Liabilities incurred(1)	8,766,000	[1]	'	'
Liabilities settled	-40,552,000		'	'
Accretion expense	-5,568,000		-6,600,000	'
ARO estimate adjustments	0		'	'
Ending liability	446,524,000		'	'
Regulatory requirement for funds for clean-up projects	141,900,000		'	142,500,000
Facilities and equipment ARO	'		'	'
Facility and Equipment Decontamination and Decommissioning	'		'	'
Facility and equipment decontamination and decommissioning liabilities	446,524,000		'	472,742,000
Facilities and equipment ARO | Zion Station	'		'	'
Facility and Equipment Decontamination and Decommissioning	'		'	'
Facility and equipment decontamination and decommissioning liabilities	374,848,000		'	409,190,000
Facilities and equipment ARO | Clive, UT	'		'	'
Facility and Equipment Decontamination and Decommissioning	'		'	'
Facility and equipment decontamination and decommissioning liabilities	27,585,000		'	28,106,000
Facilities and equipment ARO | Other	'		'	'
Facility and Equipment Decontamination and Decommissioning	'		'	'
Facility and equipment decontamination and decommissioning liabilities	44,091,000		'	35,446,000
Closure | Barnwell	'		'	'
Facility and Equipment Decontamination and Decommissioning	'		'	'
Facility and equipment decontamination and decommissioning liabilities	3,246,000		'	3,822,000
Line of Credit [Member] | Zion Station	'		'	'
Reconciliation of facility and equipment ARO	'		'	'
Maximum borrowing capacity under credit facility	$200,000,000		'	'
[1]	Represents ARO liabilities related to the acquisition of Studsvik, Inc.'s Tennessee processing facilities located in Erwin and Memphis, Tennessee.

EquityBased_Compensation_Detai

Equity-Based Compensation (Details) (USD $)	Dec. 31, 2012	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	22-May-13
In Millions, except Share data, unless otherwise specified		Stock options	Stock options	Phantom Stock	Phantom Stock	Rockwell Plan	Rockwell Plan
Equity-Based Compensation	'	'	'	'	'	'	'
Aggregate number of shares of common stock that may be issued pursuant to awards granted under the plan	10,440,000	'	'	'	'	'	36,087
Options issued under the plan	'	'	'	'	'	34,867	'
Fair Value Assumptions of Options under Black‑Scholes Model [Abstract]	'	'	'	'	'	'	'
Expected volatility rate	'	'	'	'	'	72.20%	'
Risk free interest rate	'	'	'	'	'	1.39%	'
Expected term	'	'	'	'	'	'6 years 6 months	'
Non-cash compensation expense	'	$1.10	($0.30)	$0	$1.60	'	'
Unrecognized compensation expense	'	$18.70	'	'	'	'	'
Recognition period of unrecognized compensation expense	'	'4 years 1 month 50 days	'	'	'	'	'

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Income Tax Contingency [Line Items]	'	'	'
Undistributed earnings of non-U.S. operations	$68,000,000	'	'
Income tax expense (benefit)	-517,000	6,539,000	'
Effective income tax rate (as a percent)	0.50%	-393.60%	'
Statutory federal income tax rate (as a percent)	35.00%	'	'
Income tax discrete benefit	2,000,000	'	'
Income taxes payment	2,600,000	900,000	'
Gross unrecognized tax benefits	100,000	'	100,000
UNITED KINGDOM	'	'	'
Income Tax Contingency [Line Items]	'	'	'
Dividends received	$29,700,000	'	'

Segment_Reporting_and_Business2

Segment Reporting and Business Concentrations (Details) (USD $)	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Dec. 31, 2013
	group
Segment Reporting and Business Concentrations	'		'		'
Number of major operating groups	4		'		'
Impairment of goodwill and other intangible assets	($102,324,000)		$0		'
Accumulated other comprehensive loss	-22,163,000		'		-22,877,000
Liabilities	2,079,804,000		'		2,152,328,000
Revenue from external customers	476,793,000	[1],[2]	526,208,000	[1],[2]	'
Income (loss) from operations	-88,891,000	[2],[3],[4]	14,875,000	[2],[3]	'
Depreciation, amortization and accretion expense	16,706,000	[5]	17,400,000	[5]	'
Goodwill	266,247,000		305,432,000		309,508,000
Other long-lived assets	311,986,000	[6]	346,684,000	[6]	'
Purchases of property, plant and equipment	1,158,000		3,082,000		'
Total assets	2,251,694,000	[7]	2,617,516,000	[7]	2,420,543,000
Income (loss) from unconsolidated joint ventures	292,000		676,000		'
Government Group	'		'		'
Segment Reporting and Business Concentrations	'		'		'
Revenue from external customers	62,104,000	[1],[2]	76,916,000	[1],[2]	'
Income (loss) from operations	2,856,000	[2],[3],[4]	4,584,000	[2],[3]	'
Depreciation, amortization and accretion expense	5,555,000	[5]	6,659,000	[5]	'
Goodwill	40,236,000		40,236,000		'
Other long-lived assets	15,453,000	[6]	17,023,000	[6]	'
Purchases of property, plant and equipment	0		0		'
Total assets	1,080,881,000	[7]	1,367,047,000	[7]	'
Income (loss) from unconsolidated joint ventures	400,000		900,000		'
CS	'		'		'
Segment Reporting and Business Concentrations	'		'		'
Revenue from external customers	42,175,000	[1],[2]	21,297,000	[1],[2]	'
Income (loss) from operations	9,547,000	[2],[3],[4]	3,791,000	[2],[3]	'
Depreciation, amortization and accretion expense	520,000	[5]	513,000	[5]	'
Goodwill	17,951,000		17,951,000		'
Other long-lived assets	15,635,000	[6]	17,178,000	[6]	'
Purchases of property, plant and equipment	0		50,000		'
Total assets	65,265,000	[7]	59,739,000	[7]	'
LP&D	'		'		'
Segment Reporting and Business Concentrations	'		'		'
Revenue from external customers	51,357,000	[1],[2]	46,808,000	[1],[2]	'
Income (loss) from operations	7,407,000	[2],[3],[4]	6,683,000	[2],[3]	'
Depreciation, amortization and accretion expense	7,805,000	[5]	7,385,000	[5]	'
Goodwill	208,060,000		208,096,000		'
Other long-lived assets	262,796,000	[6]	254,754,000	[6]	'
Purchases of property, plant and equipment	757,000		2,766,000		'
Total assets	543,107,000	[7]	633,854,000	[7]	'
Income (loss) from unconsolidated joint ventures	100,000		200,000		'
International	'		'		'
Segment Reporting and Business Concentrations	'		'		'
Revenue from external customers	321,157,000	[1],[2]	381,187,000	[1],[2]	'
Income (loss) from operations	-93,580,000	[2],[3],[4]	16,919,000	[2],[3]	'
Depreciation, amortization and accretion expense	1,978,000	[5]	1,898,000	[5]	'
Goodwill	0		39,149,000		'
Other long-lived assets	3,727,000	[6]	44,499,000	[6]	'
Purchases of property, plant and equipment	0		5,000		'
Total assets	458,918,000	[7]	472,173,000	[7]	'
Corporate Unallocated Items	'		'		'
Segment Reporting and Business Concentrations	'		'		'
Revenue from external customers	0	[1],[2]	0	[1],[2]	'
Income (loss) from operations	-15,121,000	[2],[3],[4]	-17,102,000	[2],[3]	'
Depreciation, amortization and accretion expense	848,000	[5]	945,000	[5]	'
Goodwill	0		0		'
Other long-lived assets	14,375,000	[6]	13,230,000	[6]	'
Purchases of property, plant and equipment	401,000		261,000		'
Total assets	103,523,000	[7]	84,703,000	[7]	'
Intersegment Eliminations	'		'		'
Segment Reporting and Business Concentrations	'		'		'
Revenue from external customers	700,000		5,500,000		'
Cost of Revenue [Member]	'		'		'
Segment Reporting and Business Concentrations	'		'		'
Depreciation, amortization and accretion expense	11,500,000		12,100,000		'
Selling, General and Administrative Expenses [Member]	'		'		'
Segment Reporting and Business Concentrations	'		'		'
Depreciation, amortization and accretion expense	5,200,000		5,300,000		'
Magnox Site [Member]	'		'		'
Segment Reporting and Business Concentrations	'		'		'
Impairment of goodwill and other intangible assets	-102,300,000		'		'
Accumulated other comprehensive loss	22,200,000		'		'
Liabilities	388,000,000		'		'
Revenues	318,000,000		376,300,000		'
Total assets	$380,700,000		'		'
[1]	We eliminate intersegment revenue in consolidation. Intersegment revenue for the three month periods ended March 31, 2014, and 2013 was $0.7 million and $5.5 million, respectively. Revenue by segment represent revenue earned based on third-party billings to customers.
[2]	Results of our operations for services provided to our customers in Asia and Europe are included in our Products Group, and for services provided in Canada are included
[3]	For the three month periods ended March 31, 2014, and 2013, we recorded $0.3 million and $0.7 million, respectively of income from our unconsolidated joint ventures of which $0.1million and $0.2 million, respectively, of losses are attributable to LP&D operations; and $0.4 million and $0.9 million, respectively, of income is attributable to the Projects Group.
[4]	Losses from our International operations for the three month period ended March 31, 2014, included a $102.3 million non cash impairment charge related to Goodwill and the customer relationship intangible assets associated to the Magnox contract.
[5]	Depreciation, amortization and accretion expenses ("DA&A") are included in cost of revenue and SG&A expenses in the accompanying condensed consolidated statements of operations and comprehensive income (loss). DA&A expenses included in cost of revenue for the three month periods ended March 31, 2014, and 2013 were $11.5 million and $12.1 million, respectively. DA&A expenses included in SG&A for the three month periods ended March 31, 2014, and 2013, were $5.2 million and $5.3 million, respectively.
[6]	Other long-lived assets include property, plant and equipment and other intangible assets.
[7]	Corporate unallocated assets relate primarily to income tax receivables, deferred tax assets, deferred financing costs, prepaid expenses, and property, plant and equipment that benefit the entire Company and cash

Pension_Plans_Details

Pension Plans (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Compensation and Retirement Disclosure [Abstract]	'	'
Service cost	$16,552	$14,216
Interest cost	45,559	38,726
Expected return on plan assets	-54,084	-45,290
Net actuarial loss	83	78
Net periodic benefit costs	$8,110	$7,730

Restructuring_Details

Restructuring (Details) (USD $)

3 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

In Thousands, unless otherwise specified

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Mar. 31, 2013

Dec. 31, 2013

Dec. 31, 2009

Mar. 31, 2014

Mar. 31, 2013

Dec. 31, 2009

Mar. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Restructuring Plan

Restructuring Plan

Restructuring Plan

Restructuring Plan

Restructuring Plan

Magnox organizational restructuring program

Magnox organizational restructuring program

Magnox organizational restructuring program

Magnox organizational restructuring program

Magnox organizational restructuring program

Other Noncurrent Liabilities [Member]

Other Noncurrent Liabilities [Member]

Employee Severance and Termination Benefits [Member]

Employee Severance and Termination Benefits [Member]

Contract Termination [Member]

Contract Termination [Member]

Contract Termination [Member]

phase

Reduction of employees

Reduction of employees

Reduction of employees

Reduction of employees

Restructuring Plan

Restructuring Plan

site

Magnox sites

Bradwell site

Contract Termination [Member]

Contract Termination [Member]

employee

employee

Employee Termination Benefits

'

'

'

'

'

'

'

'

'

'

'

'

Restructuring costs

'

'

$0

$1,800

'

'

$0

$55,600

'

'

'

'

Period for payment of unpaid liability related to restructuring activities

'6 months

'

'

'

'

'

'20 months

'

'

'

'

'

Number of Magnox sites identified to reduce the existing workforce

'

'

'

'

'

3

'

'

'

'

'

'

Number of phases in which termination plan presented

'

'

'

'

'

2

'

'

'

'

'

'

Number of employees terminated or left on a voluntary basis

'

'

'

'

'

'

'

'

300

200

'

'

Reconciliation of the beginning and ending liability balances

'

'

'

'

'

'

'

'

'

'

'

'

Restructuring reserve, beginning balance

'

'

'

'

'

'

46,728

'

'

'

'

'

Additions

'

'

0

1,800

'

'

0

55,600

'

'

'

'

Payments

'

'

'

'

'

'

-5,453

'

'

'

'

'

Effect of exchange rate

'

'

'

'

'

'

398

'

'

'

'

'

Restructuring reserve, ending balance

'

'

'

'

'

'

41,673

'

'

'

'

'

Restructuring reserve, current

-600

-1,100

-9,100

'

-9,500

'

-10,676

'

'

'

-7,000

-7,300

Restructuring reserve, noncurrent

'

'

'

'

'

'

$30,997

'

'

'

'

'

Guarantor_and_NonGuarantor_Fin2

Guarantor and Non-Guarantor Financial Information (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014		Mar. 31, 2013
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS)	'		'
Revenue	$476,793	[1],[2]	$526,208	[1],[2]
Cost of revenue	-432,770		-479,788
Gross profit	44,023		46,420
Selling, general and administrative expenses	-30,882		-32,221
Impairment of goodwill and other intangible assets	-102,324		'
Equity in income of unconsolidated joint ventures	292		676
Income (loss) from operations	-88,891	[2],[3],[4]	14,875	[2],[3]
Interest expense	-21,356		-18,645
Income (loss) from subsidiaries	0		0
Other, net	11,618		2,111
Loss before income taxes and noncontrolling interests	-98,629		-1,659
Provision for income taxes	517		-6,539
Net loss	-98,112		-8,198
Net loss attributable to EnergySolutions	-98,111		-8,200
Other comprehensive income (loss):	'		'
Net income (loss)	-98,112		-8,198
Foreign currency translation adjustments, net of taxes	840		-8,687
Change in unrecognized actuarial loss	-126		-478
Other comprehensive loss, net of taxes	-97,398		-17,363
Net Income (Loss) Attributable to Noncontrolling Interest	-1		2
Less: net loss attributable to noncontrolling interests	1		-2
Comprehensive loss attributable to EnergySolutions	-97,397		-17,365
Energy Solutions, Inc.	'		'
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS)	'		'
Revenue	0		0
Cost of revenue	0		0
Gross profit	0		0
Selling, general and administrative expenses	0		0
Impairment of goodwill and other intangible assets	0		'
Equity in income of unconsolidated joint ventures	0		0
Income (loss) from operations	0		0
Interest expense	0		0
Income (loss) from subsidiaries	-100,913		-6,236
Other, net	0		0
Loss before income taxes and noncontrolling interests	-100,913		-6,236
Provision for income taxes	2,802		-1,964
Net loss	-98,111		-8,200
Net loss attributable to EnergySolutions	-98,111		-8,200
Other comprehensive income (loss):	'		'
Net income (loss)	-98,111		-8,200
Foreign currency translation adjustments, net of taxes	0		0
Change in unrecognized actuarial loss	0		0
Other comprehensive loss, net of taxes	-98,111		-8,200
Net Income (Loss) Attributable to Noncontrolling Interest	0		0
Less: net loss attributable to noncontrolling interests	0		0
Comprehensive loss attributable to EnergySolutions	-98,111		-8,200
EnergySolutions, LLC	'		'
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS)	'		'
Revenue	18,510		11,275
Cost of revenue	-13,923		-7,195
Gross profit	4,587		4,080
Selling, general and administrative expenses	-15,835		-17,492
Impairment of goodwill and other intangible assets	0		'
Equity in income of unconsolidated joint ventures	0		0
Income (loss) from operations	-11,248		-13,412
Interest expense	-17,187		-15,190
Income (loss) from subsidiaries	-72,512		24,772
Other, net	34		-2,406
Loss before income taxes and noncontrolling interests	-100,913		-6,236
Provision for income taxes	0		0
Net loss	-100,913		-6,236
Net loss attributable to EnergySolutions	-100,913		-6,236
Other comprehensive income (loss):	'		'
Net income (loss)	-100,913		-6,236
Foreign currency translation adjustments, net of taxes	0		0
Change in unrecognized actuarial loss	0		0
Other comprehensive loss, net of taxes	-100,913		-6,236
Net Income (Loss) Attributable to Noncontrolling Interest	0		0
Less: net loss attributable to noncontrolling interests	0		0
Comprehensive loss attributable to EnergySolutions	-100,913		-6,236
Guarantor Subsidiaries	'		'
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS)	'		'
Revenue	120,240		96,895
Cost of revenue	-98,030		-80,077
Gross profit	22,210		16,818
Selling, general and administrative expenses	-9,430		-9,975
Impairment of goodwill and other intangible assets	0		'
Equity in income of unconsolidated joint ventures	292		676
Income (loss) from operations	13,072		7,519
Interest expense	0		0
Income (loss) from subsidiaries	0		0
Other, net	29,790		163
Loss before income taxes and noncontrolling interests	42,862		7,682
Provision for income taxes	0		0
Net loss	42,862		7,682
Net loss attributable to EnergySolutions	42,863		7,682
Other comprehensive income (loss):	'		'
Net income (loss)	42,862		7,682
Foreign currency translation adjustments, net of taxes	0		0
Change in unrecognized actuarial loss	0		0
Other comprehensive loss, net of taxes	42,862		7,682
Net Income (Loss) Attributable to Noncontrolling Interest	-1		0
Less: net loss attributable to noncontrolling interests	1		0
Comprehensive loss attributable to EnergySolutions	42,863		7,682
Non-Guarantor Subsidiaries	'		'
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS)	'		'
Revenue	352,456		431,052
Cost of revenue	-335,230		-405,530
Gross profit	17,226		25,522
Selling, general and administrative expenses	-5,617		-4,754
Impairment of goodwill and other intangible assets	-102,324		'
Equity in income of unconsolidated joint ventures	0		0
Income (loss) from operations	-90,715		20,768
Interest expense	-4,169		-3,455
Income (loss) from subsidiaries	0		0
Other, net	-18,206		4,354
Loss before income taxes and noncontrolling interests	-113,090		21,667
Provision for income taxes	-2,285		-4,575
Net loss	-115,375		17,092
Net loss attributable to EnergySolutions	-115,375		17,090
Other comprehensive income (loss):	'		'
Net income (loss)	-115,375		17,092
Foreign currency translation adjustments, net of taxes	840		-8,687
Change in unrecognized actuarial loss	-126		-478
Other comprehensive loss, net of taxes	-114,661		7,927
Net Income (Loss) Attributable to Noncontrolling Interest	0		2
Less: net loss attributable to noncontrolling interests	0		-2
Comprehensive loss attributable to EnergySolutions	-114,661		7,925
Eliminations	'		'
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS)	'		'
Revenue	-14,413		-13,014
Cost of revenue	14,413		13,014
Gross profit	0		0
Selling, general and administrative expenses	0		0
Impairment of goodwill and other intangible assets	0		'
Equity in income of unconsolidated joint ventures	0		0
Income (loss) from operations	0		0
Interest expense	0		0
Income (loss) from subsidiaries	173,425		-18,536
Other, net	0		0
Loss before income taxes and noncontrolling interests	173,425		-18,536
Provision for income taxes	0		0
Net loss	173,425		-18,536
Net loss attributable to EnergySolutions	173,425		-18,536
Other comprehensive income (loss):	'		'
Net income (loss)	173,425		-18,536
Foreign currency translation adjustments, net of taxes	0		0
Change in unrecognized actuarial loss	0		0
Other comprehensive loss, net of taxes	173,425		-18,536
Net Income (Loss) Attributable to Noncontrolling Interest	0		0
Less: net loss attributable to noncontrolling interests	0		0
Comprehensive loss attributable to EnergySolutions	$173,425		($18,536)
[1]	We eliminate intersegment revenue in consolidation. Intersegment revenue for the three month periods ended March 31, 2014, and 2013 was $0.7 million and $5.5 million, respectively. Revenue by segment represent revenue earned based on third-party billings to customers.
[2]	Results of our operations for services provided to our customers in Asia and Europe are included in our Products Group, and for services provided in Canada are included
[3]	For the three month periods ended March 31, 2014, and 2013, we recorded $0.3 million and $0.7 million, respectively of income from our unconsolidated joint ventures of which $0.1million and $0.2 million, respectively, of losses are attributable to LP&D operations; and $0.4 million and $0.9 million, respectively, of income is attributable to the Projects Group.
[4]	Losses from our International operations for the three month period ended March 31, 2014, included a $102.3 million non cash impairment charge related to Goodwill and the customer relationship intangible assets associated to the Magnox contract.

Guarantor_and_NonGuarantor_Fin3

Guarantor and Non-Guarantor Financial Information (Details 2) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013	Mar. 31, 2013		Dec. 31, 2012
	subsidiary
Guarantor and Non-Guarantor Financial Information	'		'	'		'
Maximum number of other special purpose subsidiaries that may be established for license stewardship projects and excluded as a guarantor of senior secured credit facility	5		'	'		'
Assets	'		'	'		'
Cash and cash equivalents	$65,579		$84,213	$90,425		$134,191
Accounts receivable, net of allowance for doubtful accounts	340,538		287,438	'		'
Costs and estimated earnings in excess of billings on uncompleted contracts	75,269		85,965	'		'
Nuclear decommissioning trust fund investments, current portion	110,359		112,475	'		'
Deferred costs, current portion	101,192		91,841	'		'
Prepaid Expense and Other Assets, Current	15,605		15,868	'		'
Total current assets	708,542		677,800	'		'
Property, plant and equipment, net	131,665		114,476	'		'
Goodwill	266,247		309,508	305,432		'
Intangibles, net	180,321		214,361	'		'
Restricted cash	205,830		293,896	'		'
Nuclear decommissioning trust fund	312,132		330,442	'		'
Deferred income taxes	28,023		29,707	'		'
Deferred costs	241,029		270,039	'		'
Investment in subsidiaries	0		0	'		'
Intercompany receivable	0		0	'		'
Other long term assets	177,905		180,314	'		'
Total assets	2,251,694	[1]	2,420,543	2,617,516	[1]	'
Liabilities and Stockholders’ Equity	'		'	'		'
Intercompany payable	0		0	'		'
Deferred income taxes	29,085		30,363	'		'
Accounts payable	152,065		145,857	'		'
Accrued expenses and other current liabilities	270,388		208,177	'		'
Unearned revenue, current portion	135,164		118,465	'		'
Facility and equipment decontamination and decommissioning liabilities, current portion	97,681		98,175	'		'
Other Liabilities, Current	'		95,363	'		'
Total current liabilities	684,383		666,037	'		'
Intercompany loan payable	0		0	'		'
Long-term debt, less current portion	646,430		666,814	'		'
Facility and equipment decontamination and decommissioning liabilities, current portion	352,089		378,389	'		'
Unearned revenue, less current portion	243,803		272,940	'		'
Other liabilities, net	153,099		168,148	'		'
Stockholders' equity	171,403		267,727	'		'
Net income attributable to noncontrolling interests	487		488	'		'
Total liabilities and stockholders’ equity	2,251,694		2,420,543	'		'
Energy Solutions, Inc.	'		'	'		'
Assets	'		'	'		'
Cash and cash equivalents	0		0	0		0
Accounts receivable, net of allowance for doubtful accounts	0		0	'		'
Costs and estimated earnings in excess of billings on uncompleted contracts	0		0	'		'
Nuclear decommissioning trust fund investments, current portion	0		0	'		'
Deferred costs, current portion	0		0	'		'
Prepaid Expense and Other Assets, Current	0		0	'		'
Total current assets	0		0	'		'
Property, plant and equipment, net	0		0	'		'
Goodwill	0		0	'		'
Intangibles, net	0		0	'		'
Restricted cash	0		0	'		'
Nuclear decommissioning trust fund	0		0	'		'
Deferred income taxes	28,023		29,707	'		'
Deferred costs	0		0	'		'
Investment in subsidiaries	-165,294		-65,095	'		'
Intercompany receivable	337,082		333,300	'		'
Other long term assets	0		0	'		'
Total assets	199,811		297,912	'		'
Liabilities and Stockholders’ Equity	'		'	'		'
Intercompany payable	0		0	'		'
Deferred income taxes	29,085		'	'		'
Accounts payable	0		0	'		'
Accrued expenses and other current liabilities	0		477	'		'
Unearned revenue, current portion	0		0	'		'
Facility and equipment decontamination and decommissioning liabilities, current portion	0		0	'		'
Other Liabilities, Current	'		19,261	'		'
Total current liabilities	29,085		19,738	'		'
Intercompany loan payable	0		0	'		'
Long-term debt, less current portion	0		0	'		'
Facility and equipment decontamination and decommissioning liabilities, current portion	0		0	'		'
Unearned revenue, less current portion	0		0	'		'
Other liabilities, net	-677		10,447	'		'
Stockholders' equity	171,403		267,727	'		'
Net income attributable to noncontrolling interests	0		0	'		'
Total liabilities and stockholders’ equity	199,811		297,912	'		'
EnergySolutions, LLC	'		'	'		'
Assets	'		'	'		'
Cash and cash equivalents	39,487		33,556	46,383		93,080
Accounts receivable, net of allowance for doubtful accounts	10,769		13,793	'		'
Costs and estimated earnings in excess of billings on uncompleted contracts	9,080		9,884	'		'
Nuclear decommissioning trust fund investments, current portion	0		0	'		'
Deferred costs, current portion	0		0	'		'
Prepaid Expense and Other Assets, Current	9,405		6,548	'		'
Total current assets	68,741		63,781	'		'
Property, plant and equipment, net	74,975		52,149	'		'
Goodwill	35,769		29,764	'		'
Intangibles, net	155,398		151,580	'		'
Restricted cash	1,924		89,537	'		'
Nuclear decommissioning trust fund	0		0	'		'
Deferred income taxes	0		0	'		'
Deferred costs	0		0	'		'
Investment in subsidiaries	620,690		693,474	'		'
Intercompany receivable	0		0	'		'
Other long term assets	8,839		11,275	'		'
Total assets	966,336		1,091,560	'		'
Liabilities and Stockholders’ Equity	'		'	'		'
Intercompany payable	0		0	'		'
Deferred income taxes	0		'	'		'
Accounts payable	4,587		5,198	'		'
Accrued expenses and other current liabilities	74,171		56,788	'		'
Unearned revenue, current portion	12,496		2,229	'		'
Facility and equipment decontamination and decommissioning liabilities, current portion	0		0	'		'
Other Liabilities, Current	'		65,000	'		'
Total current liabilities	91,254		129,215	'		'
Intercompany loan payable	535,993		513,136	'		'
Long-term debt, less current portion	448,657		469,260	'		'
Facility and equipment decontamination and decommissioning liabilities, current portion	38,664		30,375	'		'
Unearned revenue, less current portion	0		0	'		'
Other liabilities, net	17,062		14,669	'		'
Stockholders' equity	-165,294		-65,095	'		'
Net income attributable to noncontrolling interests	0		0	'		'
Total liabilities and stockholders’ equity	966,336		1,091,560	'		'
Guarantor Subsidiaries	'		'	'		'
Assets	'		'	'		'
Cash and cash equivalents	4,643		872	3,751		3,371
Accounts receivable, net of allowance for doubtful accounts	53,570		47,034	'		'
Costs and estimated earnings in excess of billings on uncompleted contracts	40,701		41,993	'		'
Nuclear decommissioning trust fund investments, current portion	0		0	'		'
Deferred costs, current portion	7,873		333	'		'
Prepaid Expense and Other Assets, Current	5,393		4,402	'		'
Total current assets	112,180		94,634	'		'
Property, plant and equipment, net	54,860		60,269	'		'
Goodwill	228,116		223,506	'		'
Intangibles, net	21,744		21,210	'		'
Restricted cash	3,245		3,821	'		'
Nuclear decommissioning trust fund	0		0	'		'
Deferred income taxes	0		0	'		'
Deferred costs	0		0	'		'
Investment in subsidiaries	0		0	'		'
Intercompany receivable	198,794		193,465	'		'
Other long term assets	18,553		17,955	'		'
Total assets	637,492		614,860	'		'
Liabilities and Stockholders’ Equity	'		'	'		'
Intercompany payable	3,775		5,215	'		'
Deferred income taxes	0		'	'		'
Accounts payable	7,283		16,027	'		'
Accrued expenses and other current liabilities	20,912		35,075	'		'
Unearned revenue, current portion	28,763		23,296	'		'
Facility and equipment decontamination and decommissioning liabilities, current portion	0		0	'		'
Other Liabilities, Current	'		0	'		'
Total current liabilities	60,733		79,613	'		'
Intercompany loan payable	0		0	'		'
Long-term debt, less current portion	0		0	'		'
Facility and equipment decontamination and decommissioning liabilities, current portion	36,241		36,981	'		'
Unearned revenue, less current portion	0		0	'		'
Other liabilities, net	1,335		1,944	'		'
Stockholders' equity	539,183		496,322	'		'
Net income attributable to noncontrolling interests	0		0	'		'
Total liabilities and stockholders’ equity	637,492		614,860	'		'
Non-Guarantor Subsidiaries	'		'	'		'
Assets	'		'	'		'
Cash and cash equivalents	21,449		49,785	40,291		37,740
Accounts receivable, net of allowance for doubtful accounts	277,343		229,138	'		'
Costs and estimated earnings in excess of billings on uncompleted contracts	28,234		36,820	'		'
Nuclear decommissioning trust fund investments, current portion	110,359		112,475	'		'
Deferred costs, current portion	93,319		91,508	'		'
Prepaid Expense and Other Assets, Current	807		4,918	'		'
Total current assets	531,511		524,644	'		'
Property, plant and equipment, net	1,830		2,058	'		'
Goodwill	2,362		56,238	'		'
Intangibles, net	3,179		41,571	'		'
Restricted cash	200,661		200,538	'		'
Nuclear decommissioning trust fund	312,132		330,442	'		'
Deferred income taxes	0		0	'		'
Deferred costs	241,029		270,039	'		'
Investment in subsidiaries	0		0	'		'
Intercompany receivable	10,625		8,997	'		'
Other long term assets	150,513		151,084	'		'
Total assets	1,453,842		1,585,611	'		'
Liabilities and Stockholders’ Equity	'		'	'		'
Intercompany payable	10,509		22,626	'		'
Deferred income taxes	0		'	'		'
Accounts payable	140,195		124,632	'		'
Accrued expenses and other current liabilities	176,269		116,306	'		'
Unearned revenue, current portion	93,055		92,515	'		'
Facility and equipment decontamination and decommissioning liabilities, current portion	97,681		98,175	'		'
Other Liabilities, Current	'		11,102	'		'
Total current liabilities	517,709		465,356	'		'
Intercompany loan payable	0		0	'		'
Long-term debt, less current portion	197,773		197,554	'		'
Facility and equipment decontamination and decommissioning liabilities, current portion	277,184		311,033	'		'
Unearned revenue, less current portion	243,803		272,940	'		'
Other liabilities, net	135,379		141,088	'		'
Stockholders' equity	81,507		197,152	'		'
Net income attributable to noncontrolling interests	487		488	'		'
Total liabilities and stockholders’ equity	1,453,842		1,585,611	'		'
Eliminations	'		'	'		'
Assets	'		'	'		'
Cash and cash equivalents	0		0	0		0
Accounts receivable, net of allowance for doubtful accounts	-1,144		-2,527	'		'
Costs and estimated earnings in excess of billings on uncompleted contracts	-2,746		-2,732	'		'
Nuclear decommissioning trust fund investments, current portion	0		0	'		'
Deferred costs, current portion	0		0	'		'
Prepaid Expense and Other Assets, Current	0		0	'		'
Total current assets	-3,890		-5,259	'		'
Property, plant and equipment, net	0		0	'		'
Goodwill	0		0	'		'
Intangibles, net	0		0	'		'
Restricted cash	0		0	'		'
Nuclear decommissioning trust fund	0		0	'		'
Deferred income taxes	0		0	'		'
Deferred costs	0		0	'		'
Investment in subsidiaries	-455,396		-628,379	'		'
Intercompany receivable	-546,501		-535,762	'		'
Other long term assets	0		0	'		'
Total assets	-1,005,787		-1,169,400	'		'
Liabilities and Stockholders’ Equity	'		'	'		'
Intercompany payable	-14,284		-27,841	'		'
Deferred income taxes	0		'	'		'
Accounts payable	0		0	'		'
Accrued expenses and other current liabilities	-964		-469	'		'
Unearned revenue, current portion	850		425	'		'
Facility and equipment decontamination and decommissioning liabilities, current portion	0		0	'		'
Other Liabilities, Current	'		0	'		'
Total current liabilities	-14,398		-27,885	'		'
Intercompany loan payable	-535,993		-513,136	'		'
Long-term debt, less current portion	0		0	'		'
Facility and equipment decontamination and decommissioning liabilities, current portion	0		0	'		'
Unearned revenue, less current portion	0		0	'		'
Other liabilities, net	0		0	'		'
Stockholders' equity	-455,396		-628,379	'		'
Net income attributable to noncontrolling interests	0		0	'		'
Total liabilities and stockholders’ equity	($1,005,787)		($1,169,400)	'		'
[1]	Corporate unallocated assets relate primarily to income tax receivables, deferred tax assets, deferred financing costs, prepaid expenses, and property, plant and equipment that benefit the entire Company and cash

Guarantor_and_NonGuarantor_Fin4

Guarantor and Non-Guarantor Financial Information (Details 3) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities	'	'
Net cash provided by (used in) operating activities	$1,835	($20,326)
Cash flows from investing activities	'	'
Purchases of property, plant and equipment	-1,158	-3,082
Purchase of nuclear decommissioning trust fund investments	-135,712	-188,286
Proceeds from sales of nuclear decommissioning trust fund investments	136,745	189,367
Acquisition of business, net of cash acquired	-20,996	0
Proceeds from disposition of property, plant and equipment	66	0
Net cash used in investing activities	-21,055	-2,001
Cash flows from financing activities	'	'
Intercompany loan receivable	0	0
Intercompany loan payable	0	0
Investment in subsidiary	0	0
Repayments of long-term debt	-87,000	-16,592
Debt financing fees	0	-3,160
Dividend: minority interest	'	0
Proceeds from issuance of common stock	'	0
Restricted cash held as collateral of letter of credit obligations	87,681	0
Minimum tax withholding on restricted stock awards	0	-431
Repayments of capital lease obligations	-208	-211
Net cash provided by (used in) financing activities	473	-20,394
Effect of exchange rate on cash	113	-1,045
Net decrease in cash and cash equivalents	-18,634	-43,766
Cash and cash equivalents, beginning of period	84,213	134,191
Cash and cash equivalents, end of period	65,579	90,425
Energy Solutions, Inc.	'	'
Cash flows from operating activities	'	'
Net cash provided by (used in) operating activities	-95,463	-10,470
Cash flows from investing activities	'	'
Purchases of property, plant and equipment	0	0
Purchase of nuclear decommissioning trust fund investments	0	0
Proceeds from sales of nuclear decommissioning trust fund investments	0	0
Acquisition of business, net of cash acquired	0	'
Proceeds from disposition of property, plant and equipment	0	'
Net cash used in investing activities	0	0
Cash flows from financing activities	'	'
Intercompany loan receivable	-4,736	-4,499
Intercompany loan payable	0	0
Investment in subsidiary	100,199	15,400
Repayments of long-term debt	0	0
Debt financing fees	'	0
Dividend: minority interest	'	0
Proceeds from issuance of common stock	'	0
Restricted cash held as collateral of letter of credit obligations	0	'
Minimum tax withholding on restricted stock awards	'	-431
Repayments of capital lease obligations	0	0
Net cash provided by (used in) financing activities	95,463	10,470
Effect of exchange rate on cash	0	0
Net decrease in cash and cash equivalents	0	0
Cash and cash equivalents, beginning of period	0	0
Cash and cash equivalents, end of period	0	0
EnergySolutions, LLC	'	'
Cash flows from operating activities	'	'
Net cash provided by (used in) operating activities	-68,072	-9,127
Cash flows from investing activities	'	'
Purchases of property, plant and equipment	-1,180	-942
Purchase of nuclear decommissioning trust fund investments	0	0
Proceeds from sales of nuclear decommissioning trust fund investments	0	0
Acquisition of business, net of cash acquired	-20,996	'
Proceeds from disposition of property, plant and equipment	66	'
Net cash used in investing activities	-22,110	-942
Cash flows from financing activities	'	'
Intercompany loan receivable	0	0
Intercompany loan payable	22,797	-2,413
Investment in subsidiary	72,843	-15,452
Repayments of long-term debt	-87,000	-16,592
Debt financing fees	'	-1,960
Dividend: minority interest	'	0
Proceeds from issuance of common stock	'	0
Restricted cash held as collateral of letter of credit obligations	87,681	'
Minimum tax withholding on restricted stock awards	'	0
Repayments of capital lease obligations	-208	-211
Net cash provided by (used in) financing activities	96,113	-36,628
Effect of exchange rate on cash	0	0
Net decrease in cash and cash equivalents	5,931	-46,697
Cash and cash equivalents, beginning of period	33,556	93,080
Cash and cash equivalents, end of period	39,487	46,383
Guarantor Subsidiaries	'	'
Cash flows from operating activities	'	'
Net cash provided by (used in) operating activities	12,213	-2,201
Cash flows from investing activities	'	'
Purchases of property, plant and equipment	0	-2,131
Purchase of nuclear decommissioning trust fund investments	0	0
Proceeds from sales of nuclear decommissioning trust fund investments	0	0
Acquisition of business, net of cash acquired	0	'
Proceeds from disposition of property, plant and equipment	0	'
Net cash used in investing activities	0	-2,131
Cash flows from financing activities	'	'
Intercompany loan receivable	-8,442	6,249
Intercompany loan payable	0	-1,514
Investment in subsidiary	0	0
Repayments of long-term debt	0	0
Debt financing fees	'	0
Dividend: minority interest	'	0
Proceeds from issuance of common stock	'	0
Restricted cash held as collateral of letter of credit obligations	0	'
Minimum tax withholding on restricted stock awards	'	0
Repayments of capital lease obligations	0	0
Net cash provided by (used in) financing activities	-8,442	4,735
Effect of exchange rate on cash	0	-23
Net decrease in cash and cash equivalents	3,771	380
Cash and cash equivalents, beginning of period	872	3,371
Cash and cash equivalents, end of period	4,643	3,751
Non-Guarantor Subsidiaries	'	'
Cash flows from operating activities	'	'
Net cash provided by (used in) operating activities	-29,504	3,701
Cash flows from investing activities	'	'
Purchases of property, plant and equipment	22	-9
Purchase of nuclear decommissioning trust fund investments	-135,712	-188,286
Proceeds from sales of nuclear decommissioning trust fund investments	136,745	189,367
Acquisition of business, net of cash acquired	0	'
Proceeds from disposition of property, plant and equipment	0	'
Net cash used in investing activities	1,055	1,072
Cash flows from financing activities	'	'
Intercompany loan receivable	0	0
Intercompany loan payable	0	0
Investment in subsidiary	0	0
Repayments of long-term debt	0	0
Debt financing fees	'	-1,200
Dividend: minority interest	'	0
Proceeds from issuance of common stock	'	0
Restricted cash held as collateral of letter of credit obligations	0	'
Minimum tax withholding on restricted stock awards	'	0
Repayments of capital lease obligations	0	0
Net cash provided by (used in) financing activities	0	-1,200
Effect of exchange rate on cash	113	-1,022
Net decrease in cash and cash equivalents	-28,336	2,551
Cash and cash equivalents, beginning of period	49,785	37,740
Cash and cash equivalents, end of period	21,449	40,291
Eliminations	'	'
Cash flows from operating activities	'	'
Net cash provided by (used in) operating activities	182,661	-2,229
Cash flows from investing activities	'	'
Purchases of property, plant and equipment	0	0
Purchase of nuclear decommissioning trust fund investments	0	0
Proceeds from sales of nuclear decommissioning trust fund investments	0	0
Acquisition of business, net of cash acquired	0	'
Proceeds from disposition of property, plant and equipment	0	'
Net cash used in investing activities	0	0
Cash flows from financing activities	'	'
Intercompany loan receivable	13,178	-1,750
Intercompany loan payable	-22,797	3,927
Investment in subsidiary	-173,042	52
Repayments of long-term debt	0	0
Debt financing fees	'	0
Dividend: minority interest	'	0
Proceeds from issuance of common stock	'	0
Restricted cash held as collateral of letter of credit obligations	0	'
Minimum tax withholding on restricted stock awards	'	0
Repayments of capital lease obligations	0	0
Net cash provided by (used in) financing activities	-182,661	2,229
Effect of exchange rate on cash	0	0
Net decrease in cash and cash equivalents	0	0
Cash and cash equivalents, beginning of period	0	0
Cash and cash equivalents, end of period	$0	$0