Kratos Defense & Security Solutions (KTOS) 10-Q 7 Nov 13 2013 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 29, 2013	Nov. 01, 2013
Document And Entity Information	'	'
Entity Registrant Name	'KRATOS DEFENSE & SECURITY SOLUTIONS, INC.	'
Entity Central Index Key	'0001069258	'
Current Fiscal Year End Date	'--12-29	'
Entity Filer Category	'Accelerated Filer	'
Document Type	'10-Q	'
Document Period End Date	29-Sep-13	'
Document Fiscal Year Focus	'2013	'
Document Fiscal Period Focus	'Q3	'
Amendment Flag	'false	'
Entity Common Stock, Shares Outstanding	'	57,049,205

CONDENSED_CONSOLIDATED_BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	Sep. 29, 2013	Dec. 30, 2012
In Millions, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$49.80	$49
Restricted cash	5	5.5
Accounts receivable, net	269	271.9
Inventoried costs	83.4	94.3
Prepaid expenses	18.4	17.4
Other current assets	3.7	17.3
Total current assets	429.3	455.4
Property, plant and equipment, net	84.5	85.6
Goodwill	596.4	596.4
Intangible assets, net	78.8	106.1
Other assets	35.7	40.4
Total assets	1,224.70	1,283.90
Current liabilities:	'	'
Accounts payable	57.7	83.6
Accrued expenses	45.4	46.4
Accrued compensation	37.1	47.8
Accrued interest	22	6.3
Billings in excess of costs and earnings on uncompleted contracts	51.2	43.7
Deferred income tax liability	29	28.9
Other current liabilities	13.8	22.1
Total current liabilities	256.2	278.8
Long-term debt principal, net of current portion	629	629.7
Long-term debt premium	15.6	18.7
Other long-term liabilities	22.2	32.6
Total liabilities	923	959.8
Commitments and contingencies	'	'
Stockholders’ equity:	'	'
Preferred stock, $0.001 par value, 5,000,000 shares authorized, 0 shares outstanding at December 30, 2012 and September 29, 2013	0	0
Common stock, $0.001 par value, 195,000,000 shares authorized; 56,613,024 and 57,048,005 shares issued and outstanding at December 30, 2012 and September 29, 2013, respectively	0	0
Additional paid-in capital	854.5	847.1
Accumulated other comprehensive loss	-0.8	-0.8
Accumulated deficit	-552	-522.2
Total stockholders' equity	301.7	324.1
Total liabilities and stockholders’ equity	$1,224.70	$1,283.90

CONDENSED_CONSOLIDATED_BALANCE1

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Sep. 29, 2013	Dec. 30, 2012
Preferred Stock:	'	'
Shares authorized (in shares)	5,000,000	5,000,000
Par value (in dollars per share)	$0.00	$0.00
Shares outstanding (in shares)	0	0
Common Stock:	'	'
Par value (in dollars per share)	$0.00	$0.00
Shares authorized (in shares)	195,000,000	195,000,000
Shares issued (in shares)	57,048,005	56,613,024
Shares outstanding (in shares)	57,048,005	56,613,024

CONDENSED_CONSOLIDATED_STATEME

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (USD $)	3 Months Ended		9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 29, 2013	Sep. 30, 2012	Sep. 29, 2013	Sep. 30, 2012
Service revenues	$108.80	$125.60	$335	$339.80
Product sales	117.6	150.7	379.9	365.8
Total revenues	226.4	276.3	714.9	705.6
Cost of service revenues	82.4	98.3	254.3	264.8
Cost of product sales	91.7	103.9	282.1	251.6
Total costs	174.1	202.2	536.4	516.4
Gross profit	52.3	74.1	178.5	189.2
Selling, general and administrative expenses	47.8	54.5	144.9	140.9
Merger and acquisition expenses	0.2	0.3	-2.3	2.7
Research and development expenses	4.8	4.5	14.5	12.9
Unused office space and other restructuring	-6.6	0.7	-5	2.1
Operating income from continuing operations	6.1	14.1	26.4	30.6
Other income (expense):	'	'	'	'
Interest expense, net	-16.2	-17.6	-48.7	-49.9
Other income (expense), net	0.8	0.4	0.2	1.3
Total other expense, net	-15.4	-17.2	-48.5	-48.6
Loss from continuing operations before income taxes	-9.3	-3.1	-22.1	-18
Provision for income taxes from continuing operations	0.2	1.3	2.9	3.8
Loss from continuing operations	-9.5	-4.4	-25	-21.8
Income (loss) from discontinued operations	-0.4	0.2	-4.8	-2.6
Net loss	-9.9	-4.2	-29.8	-24.4
Basic loss per common share:	'	'	'	'
Net loss from continuing operations (in dollars per share)	($0.17)	($0.08)	($0.44)	($0.50)
Net Loss from discontinued operations (in dollars per share)	$0	$0.01	($0.08)	($0.06)
Net loss per common share (in dollars per share)	($0.17)	($0.07)	($0.52)	($0.56)
Diluted loss per common share:	'	'	'	'
Net loss from continuing operations (in dollars per share)	($0.17)	($0.08)	($0.44)	($0.50)
Net Loss from discontinued operations (in dollars per share)	$0	$0.01	($0.08)	($0.06)
Net loss per common share (in dollars per share)	($0.17)	($0.07)	($0.52)	($0.56)
Weighted average common shares outstanding:	'	'	'	'
Basic (in shares)	57.1	56.6	56.7	43.8
Diluted (in shares)	57.1	56.6	56.7	43.8
Comprehensive Loss	'	'	'	'
Net loss from above	-9.9	-4.2	-29.8	-24.4
Other comprehensive income:	'	'	'	'
Change in cumulative translation adjustment	-0.1	-0.2	0	-0.4
Other comprehensive loss, net of tax	-0.1	-0.2	0	-0.4
Comprehensive loss	($10)	($4.40)	($29.80)	($24.80)

CONDENSED_CONSOLIDATED_STATEME1

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 29, 2013	Sep. 30, 2012
Operating activities:	'	'
Net loss	($29.80)	($24.40)
Less: Loss from discontinued operations	-4.8	-2.6
Loss from continuing operations	-25	-21.8
Adjustments to reconcile loss from continuing operations to net cash provided by operating activities from continuing operations:	'	'
Depreciation and amortization	40.7	42.5
Deferred income taxes	0	1.4
Stock-based compensation	6	4.6
Amortization of deferred financing costs	3.9	3.8
Amortization of premium on Senior Secured Notes	-3.1	-3.1
Provision for doubtful accounts	0.8	0.4
Changes in unused office space accrual	-6.8	0
Changes in assets and liabilities, net of acquisitions:	'	'
Accounts receivable	2.1	-6.3
Inventoried costs	10.9	-10.4
Prepaid expenses and other assets	0.3	-1.9
Accounts payable	-26.1	22.8
Accrued compensation	-10.8	-1.5
Accrued expenses	-1.5	-5.2
Accrued interest payable	15.6	16.6
Billings in excess of costs and earnings on uncompleted contracts	7.5	-4.7
Income tax receivable and payable	3.9	-0.8
Other liabilities	-7.4	-1.3
Net cash provided by operating activities from continuing operations	11	35.1
Investing activities:	'	'
Cash paid for acquisitions, net of cash acquired	2.2	-149.4
Decrease in restricted cash	0.5	0.5
Proceeds from the sale of discontinued operations	0.4	0
Capital expenditures	-12.2	-12
Net cash used in investing activities from continuing operations	-9.1	-160.9
Financing activities:	'	'
Proceeds from the issuance of common stock	0	97
Borrowings under credit facility	0	40
Cash paid for contingent acquisition consideration	-2.1	-2.5
Repayment of debt	-0.8	-40.8
Debt issuance costs	0	-1.2
Other	1.2	-0.9
Net cash provided by (used in) financing activities from continuing operations	-1.7	91.6
Net cash flows of continuing operations	0.2	-34.2
Net operating cash flows of discontinued operations	0.5	2.1
Effect of exchange rate changes on cash and cash equivalents	0.1	0.1
Net increase (decrease) in cash and cash equivalents	0.8	-32
Cash and cash equivalents at beginning of period	49	69.6
Cash and cash equivalents at end of period	$49.80	$37.60

Summary_of_Significant_Account

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 29, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Summary of Significant Accounting Policies	'
	Summary of Significant Accounting Policies
	All references to the “Company” and “Kratos” refer to Kratos Defense & Security Solutions, Inc., a Delaware corporation, and its subsidiaries.
	(a)	Basis of Presentation
	The information as of September 29, 2013 and for the three and nine months ended September 30, 2012 and September 29, 2013 is unaudited. The condensed consolidated balance sheet as of December 30, 2012 was derived from the Company’s audited consolidated financial statements at that date. In the opinion of management, these unaudited condensed consolidated financial statements include all adjustments, consisting of normal recurring adjustments necessary for a fair presentation of the Company’s financial position, results of operations and cash flows for the interim periods presented. The results have been prepared in accordance with the instructions to Form 10-Q and do not necessarily include all information and footnotes necessary for presentation in accordance with accounting principles generally accepted in the U.S. (“GAAP”). These unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and the related notes included in the Company’s audited annual consolidated financial statements for the fiscal year ended December 30, 2012, included in the Company’s Annual Report on Form 10-K filed with the U.S. Securities and Exchange Commission ("SEC") on March 12, 2013 (the “Form 10-K”). Interim operating results are not necessarily indicative of operating results expected in subsequent periods or for the year as a whole.
	(b)	Principles of Consolidation
	The condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries for which all inter-company transactions have been eliminated in consolidation.
	(c)	Fiscal Year
	The Company has a 52/53 week fiscal year ending on the last Sunday of the calendar year, with interim fiscal periods ending on the last Sunday of each calendar quarter. The nine months ended September 30, 2012 consisted of a 40-week period. The nine months ended September 29, 2013 consisted of a 39-week period. There were 53 calendar weeks in the fiscal year ended December 30, 2012 and there are 52 calendar weeks in the fiscal year ending on December 29, 2013.
	(d)    Accounting Estimates
	The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Such estimates include revenue recognition, allowance for doubtful accounts, warranties, inventory valuation, valuation of long-lived assets including identifiable intangibles and goodwill, unused office space, accounting for income taxes including the related valuation allowance on the deferred tax asset and uncertain tax positions, contingencies and litigation, contingent acquisition consideration, stock-based compensation and business combination purchase price allocations. In the future, the Company may realize actual results that differ from the current reported estimates, and if the estimates that the Company has used change in the future, such changes could have a material impact on the Company's consolidated financial position, results of operations and cash flows.
	During the three months ended September 29, 2013, the company recognized a $6.8 million reduction in excess facility accrual due primarily to the sublease of additional space to a current subtenant and management's decision to utilize a portion of the building for its own use.
	In accounting for our long-term contracts for production of products and services provided to the U.S. Government and provided to our PSS segment customers under fixed price contracts, we utilize both cost-to-cost and units produced measures under the percentage-of-completion method of accounting in accordance with the provisions of Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 605, Revenue Recognition.
	Due to the size and nature of many of our contracts accounted for under the percentage-of-completion method of accounting, the estimation of total revenues and costs at completion is complicated and subject to many variables. For example, estimates are made regarding the length of time to complete a contract since costs also include expected increases in wages, prices for materials and allocated fixed costs. Similarly, assumptions are made regarding the future impact of our efficiency initiatives and cost reduction efforts. Incentives, awards or penalties related to performance on contracts are considered in estimating revenue and profit rates and are recorded when there is sufficient information to assess anticipated performance. Suppliers' assertions are also assessed and considered in estimating costs and profit rates.
	The Company closely monitors the consistent application of its critical accounting policies and compliance with contract accounting. Business operations personnel conduct periodic contract status and performance reviews. Also, regular and recurring evaluations of contract cost, scheduling and technical matters are performed by management personnel who are independent from the business operations personnel performing work under the contract. When adjustments in estimated contract revenues or costs are required, any significant changes from prior estimates are included in earnings in the current period ("the cumulative catch-up method").
	(e)    Accounting Standards Updates
	In July 2013, the FASB issued Accounting Standards Update 2013-11 ("ASU 2013-11") "Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists," which states that an unrecognized tax benefit, or a portion of an unrecognized tax benefit, should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, except as follows. To the extent a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional income taxes that would result from the disallowance of a tax position or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. The amendments in this ASU are effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. The Company does not believe that the adoption of this guidance will have a material impact on its consolidated financial statements.
	In February 2013, the FASB issued ASU 2013-02 "Comprehensive Income: Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income," which requires entities to provide information about the amounts reclassified out of accumulated other comprehensive income by component. In addition, entities are required to present, either on the face of the statement where net income is presented or in the notes, significant amounts reclassified out of accumulated other comprehensive income by the respective line items of net income but only if the amount is required under GAAP to be reclassified to net income in its entirety in the same reporting period. For other amounts that are not required under GAAP to be reclassified in their entirety to net income, entities are required to cross-reference to other disclosures required under GAAP that provide additional detail on these amounts. This standard is effective prospectively for reporting periods beginning after December 15, 2012. The Company adopted this standard in the quarter ended March 31, 2013, which did not have a material impact on its consolidated financial statements.
	In December 2011 and February 2013, the FASB issued an amendment to the Balance Sheet topic of the Accounting Standards Codification ("ASC"), which requires entities to disclose both gross and net information about both derivatives and transactions eligible for offset in the statement of financial position and instruments and transactions subject to an agreement similar to a master netting agreement. The objective of the disclosure is to facilitate comparison between those entities that prepare their financial statements on the basis of GAAP and those entities that prepare their financial statements on the basis of International Financial Reporting Standards. This standard is effective for fiscal years, and interim periods within those years, beginning on or after January 1, 2013. Retrospective presentation for all comparative periods presented is required. Accordingly, the Company will adopt this amendment in the first quarter of fiscal year 2014. The Company does not believe that the adoption of this guidance will have a material impact on its consolidated financial statements.
	Other than as noted above, there have been no changes in the Company's significant accounting policies for the nine months ended September 29, 2013 as compared to the significant accounting policies described in the Form 10-K.
	(f)	Concentrations and Uncertainties
	The Company maintains cash balances at various financial institutions, and such balances commonly exceed the $250,000 insured amount by the Federal Deposit Insurance Corporation. The Company has not experienced any losses in such accounts, and management believes that the Company is not exposed to any significant credit risk with respect to such cash and cash equivalents.
	Financial instruments, which subject the Company to potential concentrations of credit risk, consist principally of the Company’s billed and unbilled accounts receivable. The Company’s accounts receivable result from sales to customers within the federal government, state and local agencies and commercial customers in various industries. The Company performs ongoing credit evaluations of its commercial customers. Credit is extended based on evaluation of the customer’s financial condition, and collateral is not required. Accounts receivable are recorded at the invoiced amount and do not bear interest. See Note 11 for a discussion of the Company’s significant customers.

Acquisitions

Acquisitions	9 Months Ended
	Sep. 29, 2013
Business Combinations [Abstract]	'
Acquisitions	'
	Acquisitions
	(a)    Summary of Recent Acquisitions
	Composite Engineering, Inc.
	On July 2, 2012, the Company completed the acquisition of Composite Engineering, Inc. (“CEi”) for approximately $164.0 million. The purchase price, including an adjustment for working capital and cash paid to the CEi shareholders for a 338(h)(10) election of the Internal Revenue Code ("IRC"), included $135.0 million in cash and 4.0 million shares of the Company's common stock, valued at $5.94 per share on July 2, 2012, or $23.8 million. $10.7 million of the cash paid was placed into an escrow account as security for CEi's indemnification obligations as set forth in the CEi purchase agreement and was reduced by $1.0 million for the working capital adjustment paid to the Company in July 2013, at which time the remaining escrow was released to the sellers. In addition, $2.5 million was paid to retire certain pre-existing CEi debt and settle pre-existing accounts receivable from CEi at its carrying and fair value of $3.0 million. The Company made an election under Section 338(h)(10) of the IRC, which resulted in tax deductible goodwill related to this transaction, and paid approximately $1.6 million in additional tax liability incurred by the shareholders of CEi for this election. The Company estimates that the tax deductible goodwill and intangibles is approximately $140.6 million and can be deducted for federal and California state income taxes over a 15-year period.
	In connection with the completion of the CEi transaction, certain CEi personnel entered into long-term employment agreements with the Company. On July 2, 2012, the Company granted restricted stock units ("RSUs") for an aggregate of 2.0 million shares of common stock as long-term retention inducement grants to certain employees of CEi who joined Kratos. The RSUs had an estimated value of $11.9 million on the grant date, vest on the fourth anniversary of the closing of the CEi acquisition, or earlier upon the occurrence of certain events, and are being accounted for as compensation expense over such four-year period.
	To fund the acquisition of CEi, on May 14, 2012, the Company sold approximately 20.0 million shares of its common stock at a purchase price of $5.00 per share in an underwritten public offering. The Company received gross proceeds of approximately $100.0 million and net proceeds of approximately $97.0 million after deducting underwriting fees and other offering expenses. The Company used the net proceeds from this offering to fund a portion of the purchase price for the acquisition of CEi. In addition, the Company used borrowings of $40.0 million from its revolving line of credit to fund the purchase price of CEi.
	CEi is a vertically integrated manufacturer and developer of unmanned aerial target systems and composite structures used for national security programs. Its drones are designed to replicate some of the most lethal aerial threats facing warfighters and strategic assets. CEi's customers include U.S. agencies and foreign governments. CEi is a part of the Kratos Government Solutions ("KGS") segment.
	The excess of the purchase price over the fair value of the tangible and identifiable intangible assets acquired and liabilities assumed in the acquisition was allocated to goodwill. The value of the goodwill represents the value the Company expects to be created by enabling it to strategically expand its strengths in the areas of design, engineering, development, manufacturing and production of unmanned aerial targets, and will also enable the Company to realize significant cross selling opportunities.
	The transaction has been accounted for using the acquisition method of accounting, which requires, among other things, that the assets acquired and liabilities assumed be recognized at their fair values as of the acquisition date. The following table summarizes the fair values of the major assets acquired and liabilities assumed (in millions):
	Cash	$	8.9
	Accounts receivable	9.3
	Inventoried costs	12.3
	Other current assets	8.9
	Property and equipment	8.1
	Intangible assets	38
	Goodwill	104.2
	Total assets	189.7
	Current liabilities	(25.7		)
	Net assets acquired	$	164
	The goodwill recorded in this transaction is tax deductible.
	As of July 2, 2012, the expected fair value of accounts receivable approximated historical cost. The gross accounts receivable was $9.3 million, all of which is expected to be collectible. There was no contingent purchase consideration associated with the acquisition of CEi.
	The amounts of revenue and operating loss of CEi included in the Company's condensed consolidated statement of operations and comprehensive loss for the three and nine months ended September 29, 2013 are $23.8 million and $76.8 million, and $7.4 million and $14.2 million, respectively.
	Critical Infrastructure Business
	On December 30, 2011, the Company acquired a critical infrastructure security and public safety system integration business (the “Critical Infrastructure Business”) for approximately $18.8 million, which includes a final agreement on the working capital adjustment.
	The Critical Infrastructure Business designs, engineers, deploys, manages and maintains specialty security systems at some of the most strategic asset and critical infrastructure locations in the U.S. Additionally, these security systems are typically integrated into command and control system infrastructure or command centers. Approximately 15% of the revenues of the Critical Infrastructure Business are recurring in nature due to the operation, maintenance or sustainment of the security systems once deployed. The Critical Infrastructure Business is part of the Company's Public Safety & Security (“PSS”) segment.
	The excess of the purchase price over the fair value of the tangible and identifiable intangible assets acquired and liabilities assumed in the acquisition was allocated to goodwill. The value of the goodwill represents the value the Company expects to be created by enabling it to strategically expand its strengths in the areas of homeland security solutions and will also enable the Company to realize significant cross selling opportunities and increase its sales of higher margin, fixed price products.
	The transaction has been accounted for using the acquisition method of accounting, which requires, among other things, that the assets acquired and liabilities assumed be recognized at their fair values as of the acquisition date. The following table summarizes the fair values of the major assets acquired and liabilities assumed (in millions):
	Accounts receivable	$	23.4
	Other assets	0.5
	Intangible assets	2
	Goodwill	2.6
	Total assets	28.5
	Current liabilities	(9.7		)
	Net assets acquired	$	18.8
	The goodwill recorded in this transaction is tax deductible.
	As of December 30, 2011, the expected fair value of accounts receivable approximated historical cost. The gross accounts receivable was $24.4 million, of which approximately $1.0 million is not expected to be collectible.
	Due to the integration of the Critical Infrastructure Business with the Company's existing PSS business it is impractical to estimate the amounts of revenue and operating income (loss) included in the Company's condensed consolidated statement of operations and comprehensive income (loss).
	(b)    Pro Forma Financial Information
	The following tables summarize the supplemental condensed consolidated statements of operations information on an unaudited pro forma basis as if the acquisition of CEi occurred on December 26, 2011 and include adjustments that were directly attributable to the transaction or were not expected to have a continuing impact on the Company. The acquisition of CEi is included in the results of operations for the three and nine months ended September 29, 2013. There are no material, nonrecurring pro forma adjustments directly attributable to the business combination included in the reported pro forma revenue and earnings for 2012. The pro forma results are for illustrative purposes only for the applicable period and do not purport to be indicative of the actual results that would have occurred had the transaction been completed as of the beginning of the period, nor are they indicative of results of operations that may occur in the future (all amounts except per share amounts are in millions):
			For the Nine Months Ended September 30, 2012
	Pro forma revenues		$	754.3
	Pro forma net loss before tax		(27.6		)
	Pro forma net loss		(31.4		)
	Net loss attributable to the registrant		(21.8		)
	Basic and diluted pro forma loss per share		$	(0.46	)
	The pro forma financial information reflects the elimination of acquisition related expenses incurred for nine months ended of $0.8 million, pro forma adjustments for the additional amortization associated with finite-lived intangible assets acquired, stock compensation related to the RSUs granted in the CEi transaction, adjusted depreciation expense related to the fair value of property, plant, and equipment acquired, and the related tax expense.
	These adjustments are as follows (in millions):
			For the Nine Months Ended September 30, 2012
	Intangible amortization		$	8
	Net change in stock compensation expense		1.4
	Increase in weighted average common shares outstanding for shares issued and not already included in the weighted average common shares outstanding		$	24
	Contingent Acquisition Consideration
	In connection with certain acquisitions, the Company has agreed to make additional future payments to the seller contingent upon achievement of specific performance-based milestones by the acquired entities. Pursuant to the provisions of FASB ASC Topic 805 Business Combinations ("Topic 805"), the Company will re-measure these liabilities each reporting period and record changes in the fair value in its condensed consolidated statement of operations and comprehensive income (loss). Increases or decreases in the fair value of the contingent consideration liability, which is measured as the present value of expected future cash flows, a Level 3 measurement in the fair value hierarchy (Level 3 hierarchy as defined by ASC Topic 820, Fair Value Measurements and Disclosures (“Topic 820”)), can result from changes in discount periods and rates, as well as changes in the estimates on the achievement of the performance-based milestones.
	Pursuant to the terms of the agreement and plan of merger with DEI Services Corporation entered into on August 9, 2010 (“the DEI Agreement”), upon achievement of certain cash receipts, revenue, EBITDA and backlog amounts in 2010, 2011 and 2012, the Company was obligated to pay certain additional contingent consideration (the “DEI Contingent Consideration”). The Company has paid $5.0 million related to the DEI Contingent Consideration, with the final payment of $2.1 million paid in April 2013.

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets	9 Months Ended
	Sep. 29, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill and Intangible Assets	'
	Goodwill and Intangible Assets
	(a)	Goodwill
	The Company performs its annual impairment test for goodwill in accordance with ASC Topic 350, Intangibles-Goodwill and Other (“Topic 350”) as of the last day of each fiscal year or when evidence of potential impairment exists.
	The Company assesses goodwill for impairment at the reporting unit level, which is defined as an operating segment or one level below an operating segment, referred to as a component. The Company determines its reporting units by first identifying its operating segments, and then assessing whether any components of these segments constitute a business for which discrete financial information is available and where segment management regularly reviews the operating results of that component. The Company aggregates components within an operating segment that have similar economic characteristics.
	In order to test for potential impairment, the Company estimates the fair value of each of its reporting units based on a comparison and weighting of the income approach, specifically the discounted cash flow method and the market approach, which estimates the fair value of the Company's reporting units based upon comparable market prices and recent transactions and also validates the reasonableness of the implied multiples from the income approach. The Company reconciles the fair value of its reporting units to its market capitalization by calculating its market capitalization based upon an average of its stock price prior to and subsequent to the date the Company performs its analysis and assuming a control premium. The Company uses these methodologies to determine the fair value of its reporting units for comparison to their corresponding book values because there are no observable inputs available, a Level 3 measurement. If the book value exceeds the estimated fair value for a reporting unit a potential impairment is indicated, and Topic 350 prescribes the approach for determining the impairment amount, if any.
	In accordance with Topic 350, as a result of the Company's decision in June 2012 to dispose of certain non-core businesses acquired in the Integral acquisition, the Company allocated $1.5 million of goodwill to discontinued operations, which resulted in an impairment charge (see Note 8). The Company then tested the goodwill remaining in the KGS reporting unit. The fair value of the KGS reporting unit exceeded its carrying value by 7.4% at that time.
	During the fourth quarter of 2012, the KGS reporting unit was impacted by continued declining market valuations and the economic uncertainty in the U.S. defense industry. At that time, Congress had been unable to agree on a budget that conformed with the Budget Control Act of 2011 requirements, which required additional substantial defense spending reductions through sequestration. Additionally, Congress and the President failed to agree on budgetary, tax and spending issues. As a result a FY 2013 budget was not passed and a six-month continuing resolution that funded the U.S. Government through March 27, 2013 was passed. As of December 2012, these events significantly increased the likelihood of the sequester occurring, which had negative consequences for the defense industry. In addition, as Congress and the Administration could not come to an agreement on terms of a possible national fiscal approach, they also failed to address other fiscal matters such as the debt ceiling, which is currently now expected to be reached in January 2014. These events negatively impacted the Company's estimate of the fair value of the KGS reporting unit, resulting in the book value of KGS exceeding its fair value in step one of the impairment test in the fourth quarter of 2012.
	The Company then performed the second step of the goodwill impairment test to measure the amount of the impairment loss, if any, of the KGS reporting unit. The second step of the test requires the allocation of the reporting unit's fair value to its assets and liabilities, including any unrecognized intangible assets, in a hypothetical analysis that calculates the implied fair value of goodwill as if the reporting unit was being acquired in a business combination. If the implied fair value of goodwill is less than the carrying value, the difference is recorded as an impairment loss. Based on the results of the step two analysis, the Company recorded an $82.0 million goodwill impairment in the fourth quarter of 2012. The changes in the carrying amount of goodwill for the nine months ended September 29, 2013 are as follows (in millions):
			Public Safety & Security			Government Solutions				Total
	Balance as of December 30, 2012		$	35.6		$	560.9			$	596.5
	Retrospective adjustments		—			(0.1		)		(0.1		)
	Balance as of December 30, 2012 after retrospective adjustments		$	35.6		$	560.8			$	596.4
	The accumulated impairment losses as of December 30, 2012 and September 29, 2013 were $247.4 million, of which $229.1 million was associated with the KGS segment and $18.3 million was associated with the PSS segment.
	(b)	Purchased Intangible Assets
	The following table sets forth information for finite-lived and indefinite-lived intangible assets (in millions):
		As of December 30, 2012											As of September 29, 2013
		Gross			Accumulated				Net				Gross		Accumulated			Net
		Value			Amortization				Value				Value		Amortization			Value
	Acquired finite-lived intangible assets:
	Customer relationships	$	97.7		$	(36.2	)		$	61.5			$	97.7	$	(49.4	)	$	48.3
	Contracts and backlog	80			(64.3		)		15.7				80		(75.2		)	4.8
	Developed technology and technical know-how	22.1			(6.4		)		15.7				22.1		(8.0		)	14.1
	Trade names	6.1			(1.2		)		4.9				6.1		(2.7		)	3.4
	Favorable operating lease	1.8			(0.4		)		1.4				1.8		(0.5		)	1.3
	Total finite-lived intangible assets	207.7			(108.5		)		99.2				207.7		(135.8		)	71.9
	Acquired indefinite-lived intangible assets:
	Trade names	6.9			—				6.9				6.9		—			6.9
	Total indefinite-lived intangible assets	6.9			—				6.9				6.9		—			6.9
	Total intangible assets	$	214.6		$	(108.5	)		$	106.1			$	214.6	$	(135.8	)	$	78.8
	Consolidated amortization expense related to intangible assets subject to amortization was $13.0 million and $9.0 million for the three months ended September 30, 2012 and September 29, 2013, respectively, and $32.4 million and $27.3 million for the nine months ended September 30, 2012 and September 29, 2013, respectively.

Inventoried_Costs

Inventoried Costs	9 Months Ended
	Sep. 29, 2013
Inventory Disclosure [Abstract]	'
Inventoried Costs	'
	Inventoried Costs
	Inventoried costs are stated at the lower of cost or market. Cost is determined using the average cost or first-in, first-out method and is applied consistently within an operating entity. Inventoried costs primarily relate to work in process under fixed-price contracts using costs as the basis of the percentage-of-completion calculation under the units produced method of revenue recognition. These costs represent accumulated contract costs less the portion of such costs allocated to delivered items. Accumulated contract costs include direct production costs, factory and engineering overhead and production tooling costs. Pursuant to contract provisions of U.S. Government contracts, such customers may have title to, or a security interest in, inventories related to such contracts as a result of advances, performance-based payments or progress payments. The Company reflects those advances and payments as an offset against the related inventory balances.
	The Company regularly reviews inventory quantities on hand, future purchase commitments with its suppliers, and the estimated utility of its inventory. If the Company’s review indicates a reduction in utility below carrying value, it reduces its inventory to a new cost basis.
	Inventoried costs consisted of the following components (in millions):
		December 30,			September 29,
		2012			2013
	Raw materials	$	48.4		$	44.4
	Work in process	36.5			33.3
	Finished goods	7.3			5
	Supplies and other	2.2			1.9
	Subtotal inventoried costs	94.4			84.6
	Less: Customer advances and progress payments	(0.1		)	(1.2		)
	Total inventoried costs	$	94.3		$	83.4

Stockholders_Equity

Stockholders' Equity	9 Months Ended
	Sep. 29, 2013
Equity [Abstract]	'
Stockholders' Equity	'
	Stockholders’ Equity
	On May 14, 2012, the Company sold 20.0 million shares of its common stock at a purchase price of $5.00 per share in an underwritten public offering. The Company received gross proceeds of $100.0 million. After deducting underwriting and other offering expenses, the Company received approximately $97.0 million in net proceeds. The Company used the net proceeds from this offering to fund a portion of the cash consideration paid to the stockholders of CEi in connection with the Company's acquisition thereof on July 2, 2012.
	A summary of the changes in stockholders’ equity is provided below (in millions):
		For the Nine Months Ended
		September 30, 2012				September 29, 2013
	Stockholders’ equity at beginning of period	$	312.6			$	324.1
	Comprehensive loss:
	Net loss	(24.4		)		(29.8		)
	Foreign currency translation	(0.4		)		—
	Total comprehensive loss	(24.8		)		(29.8		)
	Additional paid-in-capital from the issuance of common stock for cash	97				—
	Additional paid-in-capital from the issuance of commons stock in connection with acquisitions	23.8				—
	Stock-based compensation	4.6				6
	Employee stock purchase plan and restricted stock units settled in cash	(0.4		)		1.6
	Restricted stock units traded for taxes	(0.2		)		(0.2		)
	Stockholders’ equity at end of period	$	412.6			$	301.7
	The components of accumulated other comprehensive loss are as follows (in millions):
		For the Nine Months Ended
		30-Sep-12				29-Sep-13
	Cumulative translation adjustment	$	(0.3	)		$	(0.3	)
	Post retirement benefit reserve adjustment net of tax expense	(0.3		)		(0.5		)
	Total accumulated other comprehensive loss	$	(0.6	)		$	(0.8	)
	There were no reclassifications from other comprehensive income to net loss for the three or nine months ended September 29, 2013.
	Common stock issued by the Company for the nine months ended September 30, 2012 and September 29, 2013 was as follows (in millions):
		For the nine Months Ended
		September 30, 2012			September 29, 2013
	Shares outstanding at beginning of the period	32.4			56.6
	Stock issued for employee stock purchase plan, stock options and restricted stock units exercised	0.1			0.4
	Common stock issued for cash	20			—
	Common stock issued for acquisitions	4			—
	Shares outstanding at end of the period	56.5			57

Net_Income_Loss_Per_Common_Sha

Net Income (Loss) Per Common Share	9 Months Ended
	Sep. 29, 2013
Earnings Per Share [Abstract]	'
Net Income (Loss) Per Common Share	'
	Net Income (Loss) Per Common Share
	The Company calculates net income (loss) per share in accordance with ASC Topic 260, Earnings Per Share (“Topic 260”). Under Topic 260, basic net income (loss) per common share is calculated by dividing net income (loss) by the weighted-average number of common shares outstanding during the reporting period.
		For the Three Months Ended						For the Nine Months Ended
	(In millions, except earnings per share)	September 30,			September 29,			September 30,			September 29,
		2012			2013			2012			2013
	Loss from continuing operations (A)	$	(4.4	)	$	(9.5	)	$	(21.8	)	$	(25.0	)
	Weighted average outstanding shares of common stock (B)	56.6			57.1			43.8			56.7
	Dilutive effect of employee stock options and awards	—			—			—			—
	Common stock and common stock equivalents (C)	56.6			57.1			43.8			56.7
	Loss per share:
	Basic (A/B)	$	(0.08	)	$	(0.17	)	$	(0.50	)	$	(0.44	)
	Diluted (A/C)	$	(0.08	)	$	(0.17	)	$	(0.50	)	$	(0.44	)

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 29, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Income Taxes
	As of December 30, 2012, the Company had $13.4 million of unrecognized tax benefits that, if recognized, would affect the effective tax rate, subject to possible offset by an increase in the valuation allowance. During the nine months ended September 29, 2013, this amount was increased by $0.1 million relating to the CEI acquisition. This increase in unrecognized tax benefits was recorded as an adjustment to goodwill. Additionally, the unrecognized tax benefit amount was reduced by $3.1 million relating to the expiration of statues of limitations. $1.6 million of this reduction in unrecognized tax benefits was recorded as a benefit from continuing operations. The remaining $1.5 million was offset by an increase to the valuation allowance.
	The Company recognizes interest and penalties related to unrecognized tax benefits in its provision for income taxes. The Company recorded an expense related to interest and penalties of $0.3 million and $0.1 million for the nine months ended September 30, 2012 and September 29, 2013, respectively. The Company recorded a benefit for interest and penalties related to the reversal of prior positions of $0.1 million for the nine months ended September 30, 2012 and a benefit for interest and penalties related to the reversal of prior positions of $0.2 million for the nine months ended September 29, 2013. The Company believes that no material amount of the liabilities for uncertain tax positions will expire within twelve months of September 29, 2013.
	The Company is subject to taxation in the U.S., various state tax jurisdictions and various foreign tax jurisdictions. The Company's tax years for 2000 and later are subject to examination by the U.S. and state tax authorities due to the existence of net operating loss (“NOL”) carryforwards. Generally, the Company's tax years for 2002 and later are subject to examination by various foreign tax authorities.
	In assessing the Company's ability to realize deferred tax assets, management considers, on a periodic basis, whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. As such, management has determined that it is appropriate to maintain a full valuation allowance against the Company's U.S. federal, combined state and certain foreign deferred tax assets, with the exception of an amount equal to its deferred tax liabilities, which can be expected to reverse over a definite life. Management will continue to evaluate the necessity to maintain a valuation allowance against the Company's net deferred tax assets.
	A reconciliation of the total income tax provision to the amount computed by applying the statutory federal income tax rate of 35% to loss from continuing operations before income tax provision for the three and nine months ended September 30, 2012 and September 29, 2013 is as follows (in millions):
		For the Three Months Ended						For the Nine Months Ended
		September 30,			September 29,			September 30,			September 29,
		2012			2013			2012			2013
	Income tax benefit at federal statutory rate	$	(0.9	)	$	(3.3	)	$	(6.3	)	$	(7.7	)
	State and foreign taxes, net of federal tax benefit and valuation allowance	0.5			—			1.6			1.6
	Nondeductible expenses and other	1.3			—			2			0.4
	Impact of indefinite lived deferred tax liabilities	0.6			0.2			2.1			2.9
	Increase (decrease) in reserves for uncertain tax positions	0.1			(0.1		)	0.1			(1.7		)
	Increase (decrease) in federal valuation allowance	(0.3		)	3.4			4.3			7.4
	Total	$	1.3		$	0.2		$	3.8		$	2.9
	Federal and state income tax laws impose restrictions on the utilization of NOL and tax credit carryforwards in the event that an “ownership change” occurs for tax purposes, as defined by Section 382 (“Section 382”) of the Internal Revenue Code of 1986, as amended (the “Code”). In general, an ownership change occurs when shareholders owning 5% or more of a “loss corporation” (a corporation entitled to use NOL or other tax attribute carryovers) have increased their ownership of stock in such corporation by more than 50 percentage points during any 3-year period. The annual base Section 382 limitation is calculated by multiplying the loss corporation's value (which may be modified for certain recent increases to capital) at the time of the ownership change times the greater of the long-term tax-exempt rate determined by the Internal Revenue Service (“IRS”) in the month of the ownership change or the two preceding months. The annual base Section 382 limitation may be increased for certain recognized built-in gains during the 5-year period succeeding an ownership change The Company has incurred multiple “ownership changes” in recent years that will limit the utilization of the loss carryforwards. As a result of these changes, the Company's federal and state annual utilization of NOL carryforwards will be limited. For the nine months ended September 29, 2013, there was no impact of such limitations on the income tax provision since the amount of taxable income did not exceed the annual limitation amount. In addition, future equity offerings, shifts or acquisitions that have equity as a component of the purchase price could also result in an ownership change. If and when any other “ownership change” occurs, utilization of the NOL or other tax attributes may be further limited. As discussed elsewhere, deferred tax assets relating to the NOL and credit carryforwards are offset by a full valuation allowance. In addition, utilization of state tax loss carryforwards is dependent upon sufficient taxable income apportioned to the states.

Discontinued_Operations

Discontinued Operations	9 Months Ended
	Sep. 29, 2013
Discontinued Operations and Disposal Groups [Abstract]	'
Discontinued Operations	'
	Discontinued Operations
	In June 2012, consistent with the Company's plans to complete its assessment and evaluation of the non-core businesses acquired in the Integral acquisition, the Company committed to a plan to sell certain lines of business associated with antennas, satellite-cased products and fly-away terminals. These operations were previously reported in the KGS segment, and in accordance with Topic 205, Presentation of Financial Statements ("Topic 205"), these businesses have been classified as held for sale and reported in discontinued operations in the accompanying condensed consolidated financial statements. In the second quarter of 2012, the Company recorded a $1.5 million impairment charge associated with the portion of goodwill that was allocated to the discontinued businesses based on management's estimate of the fair value of the business. The Company sold its domestic operations to two buyers for approximately $0.8 million in cash consideration and the assumption of certain liabilities. The Company received $0.3 million in cash in 2012 from the first buyer and $0.5 million in cash in April 2013 from the second buyer. The Company recorded a $1.2 million impairment charge in the first quarter of 2013 related to its revised estimate of the fair value of these operations.
	The following table presents the results of discontinued operations (in millions):
		For the Three Months Ended					For the Nine Months Ended
		September 30, 2012		September 29, 2013			September 30, 2012			September 29, 2013
	Revenue	$	6	$	—		$	13.3		$	3.6
	Net income (loss) before taxes	0.2		(0.4		)	(2.7		)	(4.8		)
	Provision for income taxes	—		—			(0.1		)	—
	Net income (loss) after taxes	$	0.2	$	(0.4	)	$	(2.6	)	$	(4.8	)
	The following is a summary of the assets and liabilities of discontinued operations, which are in other current assets, other non-current assets, other current liabilities and other long-term liabilities in the accompanying condensed consolidated balance sheets as of December 30, 2012 and September 29, 2013 (in millions):
		December 30,		September 29,
		2012		2013
	Accounts receivable, net	$	3.4	$	—
	Inventoried costs	3		—
	Other current assets	0.2		—
	Current assets of discontinued operations	6.6		—
	Property and equipment, net	0.4		—
	Other non-current assets	0.4		—
	Non-current assets of discontinued operations	$	0.8	$	—
	Accounts payable and accrued expenses	$	4.4	$	2.9
	Billings in excess of costs and earnings on uncompleted contracts	0.1		—
	Other current liabilities	0.4		0.3
	Current liabilities of discontinued operations	4.9		3.2
	Other long-term liabilities	0.3		—
	Long-term liabilities of discontinued operations	$	0.3	$	—

Debt

Debt

9 Months Ended

Sep. 29, 2013

Debt Disclosure [Abstract]

'

Debt

'

Debt

(a)

Issuance of 10% Senior Secured Notes due 2017

On May 19, 2010, the Company entered into an indenture with the guarantors set forth therein and Wilmington Trust FSB, as trustee and collateral agent (as amended or supplemented the “Indenture”), to issue the Notes. As of September 29, 2013, the Company has issued Notes in the aggregate principal amount of $625.0 million under the Indenture, of which $225.0 million were issued on May 19, 2010, $285.0 million were issued on March 25, 2011 at a $20.0 million premium and an effective interest rate of 8.5%, and $115.0 million were issued on July 27, 2011 at a $5.8 million premium and an effective interest rate of 8.9%. These Notes have been used to fund acquisitions and for general corporate purposes. The holders of the Notes have a first priority lien on substantially all of the Company's assets and the assets of the guarantors, except with respect to accounts receivable, inventory, deposit accounts, securities accounts, cash, securities and general intangibles (other than intellectual property), on which the holders of the Notes have a second priority lien to the $110.0 million credit facility described below.

The Company pays interest on the Notes semi-annually, in arrears, on June 1 and December 1 of each year. The Notes include customary covenants and events of default as well as a consolidated fixed charge ratio of 2:1 for the incurrence of additional indebtedness. Negative covenants include, among other things, limitations on additional debt, liens, negative pledges, investments, dividends, stock repurchases, asset sales and affiliate transactions. Events of default include, among other events, non-performance of covenants, breach of representations, cross-default to other material debt, bankruptcy, insolvency, material judgments and changes in control. As of September 29, 2013, the Company was in compliance with the covenants contained in the Indenture governing the Notes.

On or after June 1, 2014, the Company may redeem some or all of the Notes at 105% of the aggregate principal amount of such Notes through June 1, 2015, 102.5% of the aggregate principal amount of such Notes through June 1, 2016 and 100% of the aggregate principal amount of such Notes thereafter, plus accrued and unpaid interest to the date of redemption. Prior to June 1, 2013, the Company may have redeemed up to 35% of the aggregate principal amount of the Notes at 110% of the aggregate principal amount of the Notes, plus accrued and unpaid interest to the date of redemption, with the net cash proceeds of certain equity offerings. In addition, the Company may, at its option, redeem some or all of the Notes at any time prior to June 1, 2014 by paying a “make whole” premium, plus accrued and unpaid interest, if any, to the date of redemption. The Company may also purchase outstanding Notes traded on the open market at any time.

(b)

Other Indebtedness

$110.0 Million Credit Facility

On July 27, 2011, the Company entered into a credit and security agreement with KeyBank National Association (“KeyBank”), as lead arranger, sole book runner and administrative agent, and East West Bank and Bank of the West, as the lenders (the “2011 Credit Agreement”). The 2011 Credit Agreement amends and restates in its entirety the credit and security agreement, dated as of May 19, 2010, by and among the Company, KeyBank and the lenders named therein (as amended). The 2011 Credit Agreement established a five-year senior secured revolving credit facility in the amount of $65.0 million (as amended and described below, the “Amended Revolver”). The Amended Revolver is secured by a lien on substantially all of the Company's assets and the assets of the guarantors thereunder, subject to certain exceptions and permitted liens. The Amended Revolver has a first priority lien on accounts receivable, inventory, deposit accounts, securities accounts, cash, securities and general intangibles (other than intellectual property). On all other assets, the Amended Revolver has a second priority lien junior to the lien securing the Notes.

Borrowings under the Amended Revolver are subject to mandatory prepayment upon the occurrence of certain events, including the issuance of certain securities, the incurrence of certain debt and the sale or other disposition of certain assets. The Amended Revolver includes customary affirmative and negative covenants and events of default, as well as a financial covenant relating to a minimum fixed charge coverage ratio of 1.25. Negative covenants include, among other things, limitations on additional debt, liens, negative pledges, investments, dividends, stock repurchases, asset sales and affiliate transactions. Events of default include, among other events, non-performance of covenants, breach of representations, cross-default to other material debt, bankruptcy and insolvency, material judgments and changes in control.

On November 14, 2011, the Company entered into a first amendment (the “First Amendment”) with certain lenders and KeyBank that amended the 2011 Credit Agreement. Among other things, the First Amendment: (i) increased the amount of the Amended Revolver from $65.0 million to $90.0 million; (ii) added to and modified the definitions of certain terms contained in the 2011 Credit Agreement; (iii) added PNC Bank, National Association as a lender under the 2011 Credit Agreement; and (iv) updated certain schedules to the 2011 Credit Agreement.

On May 4, 2012, the Company entered into a second amendment (the "Second Amendment") to the 2011 Credit Agreement. Among other things, the Second Amendment (i) increased the amount of the Amended Revolver from $90.0 million to $110.0 million, (ii) added to and modified the definitions of certain terms contained in the 2011 Credit Agreement, (iii) added Cathay Bank as a lender under the 2011 Credit Agreement, (iv) increased the maximum available to be borrowed under the 2011 Credit Agreement to $135.0 million subject to KeyBank's approval, and (v) updated certain schedules to the Credit Agreement.

On May 8, 2012, the Company entered into a third amendment (the "Third Amendment") to the 2011 Credit Agreement. Under the terms of the Third Amendment, the definitions of certain terms of the 2011 Credit Agreement were modified and the acquisition of CEi was approved. The Company used the net proceeds from the sale of 20.0 million shares of its common stock, together with the borrowings under its credit facility, to fund the purchase of CEi on July 2, 2012 and to pay related fees and expenses.

On February 27, 2013, the Company entered into a fourth amendment (the "Fourth Amendment") to the 2011 Credit Agreement. Under the terms of the Fourth Amendment, the definition of certain terms of the 2011 Credit Agreement and reporting requirements were modified.

The amounts of borrowings that may be made under the Amended Revolver are based on a borrowing base and are comprised of specified percentages of eligible receivables, eligible unbilled receivables and eligible inventory. If the amount of borrowings outstanding under the Amended Revolver exceeds the borrowing base then in effect, the Company is required to repay such borrowings in an amount sufficient to eliminate such excess. The Amended Revolver includes $50.0 million of availability for letters of credit and $10.0 million of availability for swing line loans.

The Company may borrow funds under the Amended Revolver at a rate based either on LIBOR or a base rate established by KeyBank. Base rate borrowings bear interest at an applicable margin of 1.00% to 1.75% over the base rate (which will be the greater of the prime rate or 0.5% over the federal funds rate, with a floor of 1.0% over one month LIBOR). LIBOR rate borrowings will bear interest at an applicable margin of 3.00% to 3.75% over the LIBOR rate. The applicable margin for base rate borrowings and LIBOR borrowings will depend on the average monthly revolving credit availability. The Amended Revolver also has a commitment fee of 0.50% to 0.75%, depending on the average monthly revolving credit availability. As of September 29, 2013, there were no outstanding borrowings on the Amended Revolver and $15.1 million was outstanding on letters of credit, resulting in net borrowing base availability of $74.6 million. The Company was in compliance with the financial covenants as of September 29, 2013.

Debt Acquired in Acquisition of Herley

The Company assumed a $10.0 million 10-year term loan with a bank in Israel that Herley entered into on September 16, 2008 in connection with the acquisition of one of its wholly owned subsidiaries. The balance as of September 29, 2013 was $5.0 million, and the loan is payable in quarterly installments of $0.3 million plus interest at LIBOR plus a margin of 1.5%. The loan agreement contains various covenants, including a minimum net equity covenant as defined in the loan agreement. The Company was in compliance with all covenants, including the minimum net equity covenant, as of September 29, 2013.

Fair Value of Long-term Debt

Carrying amounts and the related estimated fair values of the Company’s long-term debt financial instruments not measured at fair value on a recurring basis at December 30, 2012 and September 29, 2013 are presented in the following table:

As of December 30, 2012

As of September 29, 2013

$ in millions

Principal

Carrying

Fair Value

Principal

Carrying

Fair Value

Amount

Amount

Total Long-term debt including current portion

$

630.7

$

649.4

$

690.5

$

630

$

645.6

$

686.6

The fair value of the Company’s long-term debt was based upon actual trading activity (Level 1, Observable inputs —quoted prices in active markets) and is the estimated amount the Company would have to pay to repurchase its debt, including any premium or discount attributable to the difference between the stated interest rate and market value of interest at the balance sheet date.

The net unamortized debt premium of $15.6 million as of September 29, 2013, which is the difference between the carrying amount of $645.6 million and the principal amount of $630.0 million represented in the previous table, is being amortized to interest expense over the terms of the related debt.

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	9 Months Ended
	Sep. 29, 2013
Fair Value Disclosures [Abstract]	'
Fair Value of Financial Instruments	'
	Fair Value of Financial Instruments
	The carrying amounts and the related estimated fair values of the Company's long-term debt financial instruments not measured at fair value on a recurring basis at December 30, 2012 and September 29, 2013 are presented in Note 9. The carrying value of all other financial instruments, including cash equivalents, accounts receivable, accounts payable and short-term debt, approximated their estimated fair values at December 30, 2012 and September 29, 2013.

Significant_Customers

Significant Customers	9 Months Ended
	Sep. 29, 2013
Segment Reporting [Abstract]	'
Significant Customers	'
	Significant Customers
	Revenue from the U.S. Government, which includes foreign military sales, includes revenue from contracts for which the Company is the prime contractor as well as those for which the Company is a subcontractor and the ultimate customer is the U.S. Government. The KGS segment has substantial revenue from the U.S. Government. Sales to the U.S. Government amounted to approximately $162.9 million and $143.4 million or 59% and 63% of total Kratos revenue for the three months ended September 30, 2012 and September 29, 2013, respectively, and approximately $443.8 million and $460.9 million, or 63% and 64%, of total revenue for the nine months ended September 30, 2012 and September 29, 2013, respectively.
	The U.S. Government continues to focus on developing and implementing spending, tax, and other initiatives to reduce the deficit, create jobs, and stimulate the economy. Although defense spending is expected to remain a national priority within future federal budgets, the Budget Control Act of 2011 (“Budget Control Act”) committed the U.S. Government to reduce the federal deficit over the following ten years. Under the Budget Control Act, the Bi-Partisan Congressional Joint Select Committee on Deficit Reduction (“the Joint Committee”) was responsible for identifying $1.2 to $1.5 trillion in deficit reductions by November 30, 2011. The Joint Committee was unable to identify the reductions by this deadline and thereby triggered a provision of the Budget Control Act called “sequestration,” which requires very substantial automatic spending cuts that have started in 2013, are split between defense and non-defense programs, and continue over a nine-year period.
	On April 10, 2013, the President delivered his proposed Fiscal Year ("FY") 2014 budget to Congress. The President's $527 billion FY 2014 defense budget is slightly lower than final defense appropriations for FY 2013. While it largely reflects defense spending plans in the FY 2013 budget, it does not reflect the reductions mandated by Part II of the Budget Control Act. On October 17, 2013 HR. 2775 the “Continuing Appropriations Act of 2014” was signed into law by the President, extending the debt ceiling through February 7, 2014 and temporarily restoring funding for government agencies. The legislation funds federal agencies only until January 15, 2014, and at the FY 2013 enacted levels, which reflect the first sequestration cuts that took effect in March and a discretionary funding level of $986 billion, the amount available to the appropriators to fund FY 2014 federal government programs. There continues to be uncertainty in how sequestration will ultimately be implemented, and there are many variables in how the law could be applied that make it difficult to determine the specific impacts. Any automatic reductions in national defense programs could impact the Company's significant customers, which in turn could impact the Company's business and financial results.

Segment_Information

Segment Information	9 Months Ended
	Sep. 29, 2013
Segment Reporting [Abstract]	'
Segment Information	'
	Segment Information
	The Company operates in two principal business segments: Kratos Government Solutions and Public Safety & Security. The Company organizes its business segments based on the nature of the services offered. In the following table, total operating income of the business segments is reconciled to the corresponding consolidated amount. The reconciling item “Unallocated corporate expense, net” includes costs for certain stock-based compensation programs (including stock-based compensation costs for stock options, employee stock purchase plan shares and restricted stock units), the effects of items not considered part of management’s evaluation of segment operating performance, merger and acquisition expenses, corporate costs not allocated to the operating segments, and other miscellaneous corporate activities. Transactions between segments are generally negotiated and accounted for under terms and conditions similar to other government and commercial contracts.
	Revenues, depreciation and amortization, and operating income generated by the Company’s current reporting segments for the three and nine month periods ended September 30, 2012 and September 29, 2013 are as follows (in millions):
		Three Months Ended						Nine Months Ended
		September 30, 2012			September 29, 2013			September 30, 2012			September 29, 2013
	Revenues:
	Kratos Government Solutions
	Service revenues	$	72.8		$	57		$	202.4		$	180.9
	Product sales	150.7			117.6			365.8			379.9
	Total Kratos Government Solutions	223.5			174.6			568.2			560.8
	Public Safety & Security
	Service revenues	52.8			51.8			137.4			154.1
	Product sales	—			—			—			—
	Total Public Safety & Security	52.8			51.8			137.4			154.1
	Total revenues	$	276.3		$	226.4		$	705.6		$	714.9
	Depreciation & amortization:
	Kratos Government Solutions	$	15.7		$	12.1		$	39.9		$	38
	Public Safety & Security	0.9			0.8			2.6			2.7
	Total depreciation and amortization	$	16.6		$	12.9		$	42.5		$	40.7
	Operating income:
	Kratos Government Solutions	$	14		$	6.4		$	32.4		$	23.8
	Public Safety & Security	3.3			1.8			7.3			5.7
	Unallocated corporate expense, net	(3.2		)	(2.1		)	(9.1		)	(3.1		)
	Total operating income	$	14.1		$	6.1		$	30.6		$	26.4

Commitments_and_Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 29, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	Commitments and Contingencies
	(a)	Legal Matters
	In addition to commitments and obligations in the ordinary course of business, the Company is subject to various claims, pending and potential legal actions for damages, investigations relating to governmental laws and regulations and other matters arising out of the normal conduct of its business. The Company assesses contingencies to determine the degree of probability and range of possible loss for potential accrual in its consolidated financial statements. An estimated loss contingency is accrued in the Company's consolidated financial statements if it is probable that a liability has been incurred and the amount of the loss can be reasonably estimated. Because litigation and legal matters are inherently unpredictable and unfavorable resolutions could occur, assessing litigation and legal matter contingencies is highly subjective and requires judgments about future events. When evaluating contingencies, the Company may be unable to provide a meaningful estimate due to a number of factors, including the procedural status of the matter in question, the presence of complex or novel legal theories, and/or the ongoing discovery and development of information important to the matters. In addition, damage amounts claimed in litigation against the Company may be unsupported, exaggerated or unrelated to possible outcomes, and as such are not meaningful indicators of the Company's potential liability. The Company regularly reviews contingencies to determine the adequacy of its accruals and related disclosures. The amount of ultimate loss may differ from these estimates. It is possible that cash flows or results of operations could be materially affected in any particular period by the unfavorable resolution of one or more of these contingencies. Whether any losses finally determined in any claim, action, investigation or proceeding could reasonably have a material effect on the Company's business, financial condition, results of operations or cash flows will depend on a number of variables, including the timing and amount of such losses; the structure and type of any remedies; the monetary significance of any such losses, damages or remedies on the Company's consolidated financial statements; and the unique facts and circumstances of the particular matter that may give rise to additional factors.
	Legal and Regulatory Matters
	Integral Indemnification Obligation. Integral, which was acquired on July 27, 2011, was previously the subject of a SEC investigation. On July 30, 2009, the SEC and Integral each announced that an administrative settlement had been reached concluding the SEC's investigation. In conjunction with its announcement of the administrative settlement, the SEC disclosed that it was instituting separate civil actions against three former officers of Integral, Steven R. Chamberlain (now deceased), Elaine M. Brown and Gary A. Prince, in a case filed July 30, 2009 captioned United States Securities and Exchange Commission v. Steven R. Chamberlain, Elaine M. Brown, and Gary A. Prince, Case No. 09-CV-01423, pending in the United States District Court for the District of Columbia. The SEC's complaint alleges that from 1999 through August 2006, Chamberlain, Brown and Prince made materially false and misleading statements and omitted material information in various filings with the SEC by failing to disclose the role of Prince, who had been convicted of engaging in securities fraud while at another company, at Integral and his legal background in its filings. The SEC sought permanent injunctions against each defendant, as well as court orders imposing officer and director bars and civil penalties. Integral has indemnification obligations to these individuals, as well as to other former directors and officers of Integral who may incur indemnifiable costs in connection with these actions, pursuant to the terms of separate indemnification agreements entered into with each of them effective as of December 4, 2002. As a result of the acquisition of Integral, the Company has assumed these indemnification obligations. The indemnification agreements provide, subject to certain terms and conditions, that the Company shall indemnify the individual to the fullest extent permissible by Maryland law against judgments, penalties, fines, settlements and reasonable expenses actually incurred in the event that the individual is made a party to a legal proceeding by reason of his or her present or prior service as an officer or employee of Integral, and shall also advance reasonable litigation expenses actually incurred subject to, among other conditions, receipt of a written undertaking to repay any costs or expenses advanced if it shall ultimately be determined that the individual has not met the standard of conduct required for indemnification under Maryland law. Certain costs and expenses were previously covered under Integral's applicable directors and officers liability insurance policy. The policy limits were exhausted in December 2011, and the Company is advancing payment of indemnifiable costs pursuant to the indemnification agreements. On November 26, 2012, the SEC announced that it had finalized a settlement with Elaine M. Brown, resulting in a final judgment that resolved the SEC's matter against Brown. The SEC's case against Gary A. Prince proceeded to a bench trial in December 2012, which trial concluded in January 2013. On May 2, 2013, the court issued a memorandum opinion and entered an order granting judgment in favor of the SEC on one count of its complaint. The court found that in 1997, an accounting bar order had been issued against Mr. Prince because of his conduct at a different company, and that Mr. Prince violated the bar order between 1998 and 2006. The court issued an injunction permanently restraining and enjoining Mr. Prince from violating the accounting bar order. The court entered judgment in favor of Mr. Prince on all other counts of the SEC's complaint. No relief was sought or entered against Integral. The deadline for appeals expired on July 1, 2013. Neither party appealed, so the trial court's judgment is final. This matter is now concluded.
	U.S. Government Cost Claims. The Company's contracts with the Department of Defense are subject to audit by the Defense Contract Audit Agency (“DCAA”). As a result of these audits, from time to time, the Company is advised of claims concerning potential disallowed, overstated or disputed costs. For example, during the course of its current audits, the DCAA is closely examining and questioning certain of its established and disclosed practices that it had previously audited and accepted. In addition, based on a DCAA audit, the U.S. Department of Justice is currently investigating whether one of the Company's subsidiaries violated the federal False Claims Act by overstating its labor and material costs in a contract with the Department of Defense prior to the Company's acquisition of the subsidiary. Under the False Claims Act, the Department of Justice can seek civil penalties plus treble damages. The Company intends to defend itself in these matters and to work to resolve or settle any disputed contract costs. When appropriate, the Company records accruals to reflect its expected exposure to the matters raised by the U.S. Government, and it reviews such accruals on a quarterly basis for sufficiency based on the most recent information available. Based on its assessment, it has accrued an amount in its financial statements for contingent liabilities associated with these matters that it considers to be immaterial to its overall financial position. The matter that is currently being investigated was identified during the acquisition process and was taken into consideration in the purchase price allocation of this subsidiary. Contract disputes with the U.S. Government, however, are inherently unpredictable, and unfavorable resolutions could occur. As a result, assessing contingencies is highly subjective and requires judgment about future events. The amount of ultimate loss may exceed the Company's current accruals, and it is possible that its cash flows or results of operations could be materially affected in any particular period by the unfavorable resolution of one or more of these contingencies.
	Other Litigation Matters. The Company is subject to normal and routine litigation arising from the ordinary course and conduct of business, and, at times, as a result of acquisitions and dispositions. Such disputes include, for example, commercial, employment, intellectual property, environmental and securities matters. The aggregate amounts accrued related to these matters are not material to the total liabilities of the Company. We intend to defend ourselves in any such matters and do not currently believe that the outcome of any such matters will have a material adverse impact on our financial condition, results of operations or cash flows.
	(b)	Warranty
	Certain of the Company’s products, product finishes, and services are covered by a warranty to be free from defects in material and workmanship for periods ranging from one to ten years. Optional extended warranty contracts can also be purchased with the revenue deferred and amortized over the extended warranty period. The Company accrues a warranty liability for estimated costs to provide products, parts or services to repair or replace products in satisfaction of warranty obligations. Warranty revenues related to extended warranty contracts are amortized to income, over the life of the contract, using the straight-line method. Costs under extended warranty contracts are expensed as incurred.
	The Company’s estimate of costs to service its warranty obligations is based upon historical experience and expectations of future conditions. To the extent that the Company experiences any changes in warranty claim activity or costs associated with servicing those claims, its warranty liability is adjusted accordingly.
	The changes in the Company's aggregate product warranty liabilities, which are included in other current liabilities and other long term-liabilities on the Company's condensed consolidated balance sheets, were as follows (in millions):
		Nine Months Ended
		September 30,			September 29,
		2012			2013
	Balance at beginning of the period	$	4.6		$	5.2
	Costs accrued and revenues deferred	—			0.3
	Warranty liabilities assumed from acquisitions	1.2			—
	Settlements made (in cash or kind) and revenues recognized	(0.7		)	(0.6		)
	Balance at end of period	5.1			4.9
	Less: Current portion	(5.1		)	(4.6		)
	Non-current accrued product warranty and deferred warranty revenue	$	—		$	0.3

Condensed_Consolidating_Financ

Condensed Consolidating Financial Statements	9 Months Ended
	Sep. 29, 2013
Condensed Consolidating Financial Statements [Abstract]	'
Condensed Consolidating Financial Statements	'
	Condensed Consolidating Financial Statements
	The Company has $625.0 million in outstanding Senior Secured Notes (see Note 9). The Notes are guaranteed by all of the Company's 100% owned domestic subsidiaries (the "Subsidiary Guarantors") and are collateralized by the assets of all of the Company's 100% owned subsidiaries. The Notes are fully and unconditionally guaranteed on a joint and several basis by each guarantor subsidiary and the Company. There are no contractual restrictions limiting cash transfers from guarantor subsidiaries by dividends, loans or advances to the Company. The Senior Secured Notes are not guaranteed by the Company's foreign subsidiaries (the “Non-Guarantor Subsidiaries”).
	The following tables present condensed consolidating financial statements for the parent company, the Subsidiary Guarantors and the Non-Guarantor Subsidiaries, respectively. The condensed consolidating financial information below follows the same accounting policies as described in the consolidated financial statements, except for the use of the equity method of accounting to reflect ownership interests in wholly owned subsidiaries, which are eliminated upon consolidation.
	Condensed Consolidating Balance Sheet
	30-Dec-12
	(Unaudited)
		Parent Company			Guarantors on a Combined Basis			Non-Guarantors on a Combined Basis			Eliminations			Consolidated
	Assets
	Current Assets:
	Cash and cash equivalents	$	37.8		$	(4.0	)	$	15.2		$	—		$	49
	Accounts receivable, net	—			253.5			18.4			—			271.9
	Amounts due from affiliated companies	480.2			—			—			(480.2		)	—
	Inventoried costs	—			75.4			18.9			—			94.3
	Other current assets	9.1			28			3.1			—			40.2
	Total current assets	527.1			352.9			55.6			(480.2		)	455.4
	Property, plant and equipment, net	1.3			74.7			9.6			—			85.6
	Goodwill	—			574.7			21.7			—			596.4
	Intangible assets, net	—			103.4			2.7			—			106.1
	Investment in subsidiaries	439.8			28.8			—			(468.6		)	—
	Amounts due from affiliated companies	—			24			—			(24.0		)	—
	Other assets	17.6			22.4			0.4			—			40.4
	Total assets	$	985.8		$	1,180.90		$	90		$	(972.8	)	$	1,283.90
	Liabilities and Stockholders' Equity
	Current liabilities:
	Accounts payable	$	2.8		$	75.2		$	5.6		$	—		$	83.6
	Accrued expenses	7			42.3			3.4			—			52.7
	Accrued compensation	2.9			41.8			3.1			—			47.8
	Billings in excess of costs and earnings on uncompleted contracts	—			40.5			3.2			—			43.7
	Deferred income tax liability	—			28.9			—			—			28.9
	Amounts due to affiliated companies	—			455.1			25.1			(480.2		)	—
	Other current liabilities	1.1			19.1			1.9			—			22.1
	Total current liabilities	13.8			702.9			42.3			(480.2		)	278.8
	Long-term debt, net of current portion	643.6						4.8			—			648.4
	Amounts due to affiliated companies	—			—			24			(24.0		)	—
	Other long-term liabilities	4.3			26.2			2.1			—			32.6
	Total liabilities	661.7			729.1			73.2			(504.2		)	959.8
	Total stockholders' equity	324.1			451.8			16.8			(468.6		)	324.1
	Total liabilities and stockholders' equity	$	985.8		$	1,180.90		$	90		$	(972.8	)	$	1,283.90
	Condensed Consolidating Balance Sheet
	29-Sep-13
	(Unaudited)
		Parent Company			Guarantors on a Combined Basis			Non-Guarantors on a Combined Basis			Eliminations			Consolidated
	Assets
	Current Assets:
	Cash and cash equivalents	$	34.2		$	(3.4	)	$	19		$	—		$	49.8
	Accounts receivable, net	—			248.6			20.4			—			269
	Amounts due from affiliated companies	450.8			—			—			(450.8		)	—
	Inventoried costs	—			67.8			15.6			—			83.4
	Other current assets	9.5			14.7			2.9			—			27.1
	Total current assets	494.5			327.7			57.9			(450.8		)	429.3
	Amounts due from affiliated companies, long-term	—			24			—			(24.0		)	—
	Property, plant and equipment, net	1.9			72.3			10.3			—			84.5
	Goodwill	—			574.7			21.7			—			596.4
	Intangible assets, net	—			77.1			1.7			—			78.8
	Investment in subsidiaries	463.9			33.1			—			(497.0		)	—
	Other assets	13.8			21.7			0.2			—			35.7
	Total assets	$	974.1		$	1,130.60		$	91.8		$	(971.8	)	$	1,224.70
	Liabilities and Stockholders' Equity
	Current liabilities:
	Accounts payable	$	3		$	51		$	3.7		$	—		$	57.7
	Accrued expenses	22.8			40.9			3.7			—			67.4
	Accrued compensation	2.2			31.2			3.7			—			37.1
	Billings in excess of costs and earnings on uncompleted contracts	—			44.7			6.5			—			51.2
Deferred income tax liability	—			29			—			—			29
Amounts due to affiliated companies	—			428.9			21.9			(450.8		)	—
Other current liabilities	1.3			11.5			1			—			13.8
Total current liabilities	29.3			637.2			40.5			(450.8		)	256.2
Long-term debt, net of current portion	640.6			—			4			—			644.6
Amounts due to affiliated companies	—			—			24			(24.0		)	—
Other long-term liabilities	2.5			17.5			2.2			—			22.2
Total liabilities	672.4			654.7			70.7			(474.8		)	923
Total stockholders' equity	301.7			475.9			21.1			(497.0		)	301.7
Total liabilities and stockholders' equity	$	974.1		$	1,130.60		$	91.8		$	(971.8	)	$	1,224.70
Condensed Consolidating Statement of Operations and Comprehensive Income (Loss)
Three Months Ended September 30, 2012
(Unaudited)
	Parent Company			Guarantors on a Combined Basis			Non-Guarantors on a Combined Basis			Eliminations			Consolidated
Service revenues	$	—		$	124.9		$	0.7		$	—		$	125.6
Product sales	—			136.8			17			(3.1		)	150.7
Total revenues	—			261.7			17.7			(3.1		)	276.3
Cost of service revenues	—			97.8			0.5			—			98.3
Cost of product sales	—			96.1			10.9			(3.1		)	103.9
Total costs	—			193.9			11.4			(3.1		)	202.2
Gross profit	—			67.8			6.3			—			74.1
Selling, general and administrative expenses	4.5			47.2			3.8			—			55.5
Research and development expenses	—			4.3			0.2			—			4.5
Operating income (loss) from continuing operations	(4.5		)	16.3			2.3			—			14.1
Other income (expense):
Interest expense, net	17.6			(0.1		)	0.1			—			17.6
Other income (expense), net	—			0.1			(0.5		)	—			(0.4		)
Total other income and expense, net	17.6			—			(0.4		)	—			17.2
Income (loss) from continuing operations before income taxes	(22.1		)	16.3			2.7			—			(3.1		)
Provision for income taxes from continuing operations	—			0.9			0.4			—			1.3
Income (loss) from continuing operations	(22.1		)	15.4			2.3			—			(4.4		)
Income (loss) from discontinued operations	—			(0.5		)	0.7			—			0.2
Equity in net income (loss) of subsidiaries	17.9			3			—			(20.9		)	—
Net income (loss)	$	(4.2	)	$	17.9		$	3		$	(20.9	)	$	(4.2	)
Comprehensive income (loss)	$	(4.4	)	$	17.9		$	2.8		$	(20.7	)	$	(4.4	)
Condensed Consolidating Statement of Operations and Comprehensive Income (Loss)
Three Months Ended September 29, 2013
(Unaudited)
	Parent Company			Guarantors on a Combined Basis			Non-Guarantors on a Combined Basis			Eliminations			Consolidated
Service revenues	$	—		$	107.6		$	1.2		$	—		$	108.8
Product sales	—			103.9			17.5			(3.8		)	117.6
Total revenues	—			211.5			18.7			(3.8		)	226.4
Cost of service revenues	—			81.7			0.7			—			82.4
Cost of product sales	—			82.2			13.3			(3.8		)	91.7
Total costs	—			163.9			14			(3.8		)	174.1
Gross profit	—			47.6			4.7			—			52.3
Selling, general and administrative expenses	1.4			36.2			3.8			—			41.4
Research and development expenses	—			4.7			0.1			—			4.8
Operating income (loss) from continuing operations	(1.4		)	6.7			0.8			—			6.1
Other income (expense):
Interest expense, net	(16.2		)	0.1			(0.1		)	—			(16.2		)
Other income (expense), net	—			0.2			0.6			—			0.8
Total other income and expense, net	(16.2		)	0.3			0.5			—			(15.4		)
Income (loss) from continuing operations before income taxes	(17.6		)	7			1.3			—			(9.3		)
Provision (benefit) for income taxes from continuing operations	—			(0.1		)	0.3			—			0.2
Income (loss) from continuing operations	(17.6		)	7.1			1			—			(9.5		)
Income (loss) from discontinued operations	—			(0.4		)	—			—			(0.4		)
Equity in net income (loss) of subsidiaries	7.7			1			—			(8.7		)	—
Net income (loss)	$	(9.9	)	$	7.7		$	1		$	(8.7	)	$	(9.9	)
Comprehensive income (loss)	$	(10.0	)	$	7.7		$	0.9		$	(8.6	)	$	(10.0	)
Condensed Consolidating Statement of Operations and Comprehensive Income (Loss)
Nine Months Ended September 30, 2012
(Unaudited)
	Parent Company			Guarantors on a Combined Basis			Non-Guarantors on a Combined Basis			Eliminations			Consolidated
Service revenues	$	—		$	337.9		$	1.9		$	—		$	339.8
Product sales	—			329.4			46			(9.6		)	365.8
Total revenues	—			667.3			47.9			(9.6		)	705.6
Cost of service revenues	—			263.5			1.3			—			264.8
Cost of product sales	—			231			30.2			(9.6		)	251.6
Total costs	—			494.5			31.5			(9.6		)	516.4
Gross profit	—			172.8			16.4			—			189.2
Selling, general and administrative expenses	9.3			126.1			10.3			—			145.7
Research and development expenses	—			12.2			0.7			—			12.9
Operating (loss) income from continuing operations	(9.3		)	34.5			5.4			—			30.6
Other income expense:
Interest expense, net	49.7			(0.2		)	0.4			—			49.9
Other expense, net	(0.3		)	—			(1.0		)	—			(1.3		)
Total other expense, net	49.4			(0.2		)	(0.6		)	—			48.6
Income (loss) from continuing operations before income taxes	(58.7		)	34.7			6			—			(18.0		)
Provision for income taxes from continuing operations	—			3.1			0.7			—			3.8
Income (loss) from continuing operations	(58.7		)	31.6			5.3			—			(21.8		)
Loss from discontinued operations	—			(3.3		)	0.7			—			(2.6		)
Equity in net income (loss) of subsidiaries	34.3			6			—			(40.3		)	—
Net income (loss)	(24.4		)	34.3			6			(40.3		)	(24.4		)
Comprehensive income (loss)	$	(24.8	)	$	34.3		$	5.6		$	(39.9	)	$	(24.8	)
Condensed Consolidating Statement of Operations and Comprehensive Income (Loss)
Nine Months Ended September 29, 2013
(Unaudited)
	Parent Company			Guarantors on a Combined Basis			Non-Guarantors on a Combined Basis			Eliminations			Consolidated
Service revenues	$	—		$	332.4		$	2.6		$	—		$	335
Product sales	—			338.1			55.1			(13.3		)	379.9
Total revenues	—			670.5			57.7			(13.3		)	714.9
Cost of service revenues	—			252.5			1.8			—			254.3
Cost of product sales	—			255.7			39.7			(13.3		)	282.1
Total costs	—			508.2			41.5			(13.3		)	536.4
Gross profit	—			162.3			16.2			—			178.5
Selling, general and administrative expenses	5.1			122.4			10.1			—			137.6
Research and development expenses	—			13.7			0.8			—			14.5
Operating (loss) income from continuing operations	(5.1		)	26.2			5.3			—			26.4
Other income expense:
Interest expense, net	(48.4		)	0.1			(0.4		)	—			(48.7		)
Other expense, net	—			0.3			(0.1		)	—			0.2
Total other expense, net	(48.4		)	0.4			(0.5		)	—			(48.5		)
Income (loss) from continuing operations before income taxes	(53.5		)	26.6			4.8			—			(22.1		)
Provision for income taxes from continuing operations	0.5			1.9			0.5			—			2.9
Income (loss) from continuing operations	(54.0		)	24.7			4.3			—			(25.0		)
Loss from discontinued operations	0.1			(4.9		)	—			—			(4.8		)
Equity in net income (loss) of subsidiaries	24.1			4.3			—			(28.4		)	—
Net income (loss)	$	(29.8	)	$	24.1		$	4.3		$	(28.4	)	$	(29.8	)
Comprehensive income (loss)	$	(29.8	)	$	24.1		$	4.3		$	(28.4	)	$	(29.8	)
Condensed Consolidating Statement of Cash Flows
Nine Months Ended September 30, 2012
(Unaudited)
	Parent Company			Guarantors on a Combined Basis			Non-Guarantors on a Combined Basis			Eliminations			Consolidated
Net cash provided by (used in) operating activities	$	(32.5	)	$	61.6		$	6		$	—		$	35.1
Investing activities:
Cash paid for acquisitions, net of cash acquired	(149.4		)	—			—			—			(149.4		)
(Increase) decrease in restricted cash	(0.4		)	0.9			—			—			0.5
Capital expenditures	(0.4		)	(10.1		)	(1.5		)	—			(12.0		)
Net cash used in investing activities from continuing operations	(150.2		)	(9.2		)	(1.5		)	—			(160.9		)
Financing activities:
Proceeds from the issuance of common stock for cash, net of issuance costs	97			—			—			—			97
Cash paid for contingent acquisition consideration	—			(2.5		)	—			—			(2.5		)
Debt issuance costs	(1.2		)	—			—			—			(1.2		)
Borrowings under line of credit	40												40
Repayment of debt	(40.0		)	—			(0.8		)	—			(40.8		)
Financing from affiliated companies	55.7			(55.7		)	—			—			—
Other, net	(0.5		)	(0.4		)	—			—			(0.9		)
Net cash provided by (used in) financing activities from continuing operations	151			(58.6		)	(0.8		)	—			91.6
Net cash flows of continuing operations	(31.7		)	(6.2		)	3.7			—			(34.2		)
Net operating cash flows from discontinued operations	—			2.1			—			—			2.1
Effect of exchange rate changes on cash and cash equivalents	—			—			0.1			—			0.1
Net increase (decrease) in cash and cash equivalents	$	(31.7	)	$	(4.1	)	$	3.8		$	—		$	(32.0	)
Condensed Consolidating Statement of Cash Flows
Nine Months Ended September 29, 2013
(Unaudited)
	Parent Company			Guarantors on a Combined Basis			Non-Guarantors on a Combined Basis			Eliminations			Consolidated
Net cash provided by (used in) operating activities	$	(33.4	)	$	40.7		$	3.7		$	—		$	11
Investing activities:
Cash paid for acquisitions, net of cash acquired	—			2.2			—			—			2.2
Decrease in restricted cash	—			0.5			—			—			0.5
Other, net	—			0.4			—			—			0.4
Capital expenditures	(1.0		)	(9.3		)	(1.9		)	—			(12.2		)
Net cash used in investing activities from continuing operations	(1.0		)	(6.2		)	(1.9		)	—			(9.1		)
Financing activities:
Repayment of debt	—			—			(0.8		)	—			(0.8		)
Cash paid for contingent acquisition consideration	—			(2.1		)	—			—			(2.1		)
Financings from affiliated companies	29.6			(32.4		)	2.8			—			—
Other, net	1.2			—			—			—			1.2
Net cash provided by (used in) financing activities from continuing operations	30.8			(34.5		)	2			—			(1.7		)
Net cash flows of continuing operations	(3.6		)	—			3.8			—			0.2
Net operating cash flows from discontinued operations	—			0.5			—			—			0.5
Effect of exchange rate changes on cash and cash equivalents	—			—			0.1			—			0.1
Net increase (decrease) in cash and cash equivalents	$	(3.6	)	$	0.5		$	3.9		$	—		$	0.8

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 29, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Principles of Consolidation	'
	Principles of Consolidation
	The condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries for which all inter-company transactions have been eliminated in consolidation.
Fiscal Year	'
	Fiscal Year
	The Company has a 52/53 week fiscal year ending on the last Sunday of the calendar year, with interim fiscal periods ending on the last Sunday of each calendar quarter.
Accounting Policies and Accounting Standards Updates	'
	Accounting Estimates
	The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Such estimates include revenue recognition, allowance for doubtful accounts, warranties, inventory valuation, valuation of long-lived assets including identifiable intangibles and goodwill, unused office space, accounting for income taxes including the related valuation allowance on the deferred tax asset and uncertain tax positions, contingencies and litigation, contingent acquisition consideration, stock-based compensation and business combination purchase price allocations. In the future, the Company may realize actual results that differ from the current reported estimates, and if the estimates that the Company has used change in the future, such changes could have a material impact on the Company's consolidated financial position, results of operations and cash flows.
	During the three months ended September 29, 2013, the company recognized a $6.8 million reduction in excess facility accrual due primarily to the sublease of additional space to a current subtenant and management's decision to utilize a portion of the building for its own use.
	In accounting for our long-term contracts for production of products and services provided to the U.S. Government and provided to our PSS segment customers under fixed price contracts, we utilize both cost-to-cost and units produced measures under the percentage-of-completion method of accounting in accordance with the provisions of Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 605, Revenue Recognition.
	Due to the size and nature of many of our contracts accounted for under the percentage-of-completion method of accounting, the estimation of total revenues and costs at completion is complicated and subject to many variables. For example, estimates are made regarding the length of time to complete a contract since costs also include expected increases in wages, prices for materials and allocated fixed costs. Similarly, assumptions are made regarding the future impact of our efficiency initiatives and cost reduction efforts. Incentives, awards or penalties related to performance on contracts are considered in estimating revenue and profit rates and are recorded when there is sufficient information to assess anticipated performance. Suppliers' assertions are also assessed and considered in estimating costs and profit rates.
	The Company closely monitors the consistent application of its critical accounting policies and compliance with contract accounting. Business operations personnel conduct periodic contract status and performance reviews. Also, regular and recurring evaluations of contract cost, scheduling and technical matters are performed by management personnel who are independent from the business operations personnel performing work under the contract. When adjustments in estimated contract revenues or costs are required, any significant changes from prior estimates are included in earnings in the current period ("the cumulative catch-up method").
	(e)    Accounting Standards Updates
	In July 2013, the FASB issued Accounting Standards Update 2013-11 ("ASU 2013-11") "Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists," which states that an unrecognized tax benefit, or a portion of an unrecognized tax benefit, should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, except as follows. To the extent a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional income taxes that would result from the disallowance of a tax position or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. The amendments in this ASU are effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. The Company does not believe that the adoption of this guidance will have a material impact on its consolidated financial statements.
	In February 2013, the FASB issued ASU 2013-02 "Comprehensive Income: Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income," which requires entities to provide information about the amounts reclassified out of accumulated other comprehensive income by component. In addition, entities are required to present, either on the face of the statement where net income is presented or in the notes, significant amounts reclassified out of accumulated other comprehensive income by the respective line items of net income but only if the amount is required under GAAP to be reclassified to net income in its entirety in the same reporting period. For other amounts that are not required under GAAP to be reclassified in their entirety to net income, entities are required to cross-reference to other disclosures required under GAAP that provide additional detail on these amounts. This standard is effective prospectively for reporting periods beginning after December 15, 2012. The Company adopted this standard in the quarter ended March 31, 2013, which did not have a material impact on its consolidated financial statements.
	In December 2011 and February 2013, the FASB issued an amendment to the Balance Sheet topic of the Accounting Standards Codification ("ASC"), which requires entities to disclose both gross and net information about both derivatives and transactions eligible for offset in the statement of financial position and instruments and transactions subject to an agreement similar to a master netting agreement. The objective of the disclosure is to facilitate comparison between those entities that prepare their financial statements on the basis of GAAP and those entities that prepare their financial statements on the basis of International Financial Reporting Standards. This standard is effective for fiscal years, and interim periods within those years, beginning on or after January 1, 2013. Retrospective presentation for all comparative periods presented is required. Accordingly, the Company will adopt this amendment in the first quarter of fiscal year 2014. The Company does not believe that the adoption of this guidance will have a material impact on its consolidated financial statements.
	Other than as noted above, there have been no changes in the Company's significant accounting policies for the nine months ended September 29, 2013 as compared to the significant accounting policies described in the Form 10-K.
Concentrations and Uncertainties	'
	Concentrations and Uncertainties
	The Company maintains cash balances at various financial institutions, and such balances commonly exceed the $250,000 insured amount by the Federal Deposit Insurance Corporation. The Company has not experienced any losses in such accounts, and management believes that the Company is not exposed to any significant credit risk with respect to such cash and cash equivalents.
	Financial instruments, which subject the Company to potential concentrations of credit risk, consist principally of the Company’s billed and unbilled accounts receivable. The Company’s accounts receivable result from sales to customers within the federal government, state and local agencies and commercial customers in various industries. The Company performs ongoing credit evaluations of its commercial customers. Credit is extended based on evaluation of the customer’s financial condition, and collateral is not required. Accounts receivable are recorded at the invoiced amount and do not bear interest. See Note 11 for a discussion of the Company’s significant customers.
Goodwill and intangible assets	'
	Goodwill
	The Company performs its annual impairment test for goodwill in accordance with ASC Topic 350, Intangibles-Goodwill and Other (“Topic 350”) as of the last day of each fiscal year or when evidence of potential impairment exists.
	The Company assesses goodwill for impairment at the reporting unit level, which is defined as an operating segment or one level below an operating segment, referred to as a component. The Company determines its reporting units by first identifying its operating segments, and then assessing whether any components of these segments constitute a business for which discrete financial information is available and where segment management regularly reviews the operating results of that component. The Company aggregates components within an operating segment that have similar economic characteristics.
	In order to test for potential impairment, the Company estimates the fair value of each of its reporting units based on a comparison and weighting of the income approach, specifically the discounted cash flow method and the market approach, which estimates the fair value of the Company's reporting units based upon comparable market prices and recent transactions and also validates the reasonableness of the implied multiples from the income approach. The Company reconciles the fair value of its reporting units to its market capitalization by calculating its market capitalization based upon an average of its stock price prior to and subsequent to the date the Company performs its analysis and assuming a control premium. The Company uses these methodologies to determine the fair value of its reporting units for comparison to their corresponding book values because there are no observable inputs available, a Level 3 measurement. If the book value exceeds the estimated fair value for a reporting unit a potential impairment is indicated, and Topic 350 prescribes the approach for determining the impairment amount, if any.
Inventoried costs	'
	Inventoried Costs
	Inventoried costs are stated at the lower of cost or market. Cost is determined using the average cost or first-in, first-out method and is applied consistently within an operating entity. Inventoried costs primarily relate to work in process under fixed-price contracts using costs as the basis of the percentage-of-completion calculation under the units produced method of revenue recognition. These costs represent accumulated contract costs less the portion of such costs allocated to delivered items. Accumulated contract costs include direct production costs, factory and engineering overhead and production tooling costs. Pursuant to contract provisions of U.S. Government contracts, such customers may have title to, or a security interest in, inventories related to such contracts as a result of advances, performance-based payments or progress payments. The Company reflects those advances and payments as an offset against the related inventory balances.
	The Company regularly reviews inventory quantities on hand, future purchase commitments with its suppliers, and the estimated utility of its inventory. If the Company’s review indicates a reduction in utility below carrying value, it reduces its inventory to a new cost basis.
Earnings per share	'
	Net Income (Loss) Per Common Share
	The Company calculates net income (loss) per share in accordance with ASC Topic 260, Earnings Per Share (“Topic 260”). Under Topic 260, basic net income (loss) per common share is calculated by dividing net income (loss) by the weighted-average number of common shares outstanding during the reporting period.

Acquisitions_Tables

Acquisitions (Tables)	9 Months Ended
	Sep. 29, 2013
Business Acquisition [Line Items]	'
Schedule of pro forma financial information	'
	The pro forma results are for illustrative purposes only for the applicable period and do not purport to be indicative of the actual results that would have occurred had the transaction been completed as of the beginning of the period, nor are they indicative of results of operations that may occur in the future (all amounts except per share amounts are in millions):
			For the Nine Months Ended September 30, 2012
	Pro forma revenues		$	754.3
	Pro forma net loss before tax		(27.6		)
	Pro forma net loss		(31.4		)
	Net loss attributable to the registrant		(21.8		)
	Basic and diluted pro forma loss per share		$	(0.46	)
Schedule of nonrecurring pro forma adjustments	'
	These adjustments are as follows (in millions):
			For the Nine Months Ended September 30, 2012
	Intangible amortization		$	8
	Net change in stock compensation expense		1.4
	Increase in weighted average common shares outstanding for shares issued and not already included in the weighted average common shares outstanding		$	24
Composite Engineering, Inc.	'
Business Acquisition [Line Items]	'
Summary of the fair values of the major assets acquired and liabilities assumed	'
	The following table summarizes the fair values of the major assets acquired and liabilities assumed (in millions):
	Cash	$	8.9
	Accounts receivable	9.3
	Inventoried costs	12.3
	Other current assets	8.9
	Property and equipment	8.1
	Intangible assets	38
	Goodwill	104.2
	Total assets	189.7
	Current liabilities	(25.7		)
	Net assets acquired	$	164
Critical Infrastructure Business	'
Business Acquisition [Line Items]	'
Summary of the fair values of the major assets acquired and liabilities assumed	'
	The following table summarizes the fair values of the major assets acquired and liabilities assumed (in millions):
	Accounts receivable	$	23.4
	Other assets	0.5
	Intangible assets	2
	Goodwill	2.6
	Total assets	28.5
	Current liabilities	(9.7		)
	Net assets acquired	$	18.8

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets (Tables)	9 Months Ended
	Sep. 29, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Schedule of goodwill	'
	The changes in the carrying amount of goodwill for the nine months ended September 29, 2013 are as follows (in millions):
			Public Safety & Security			Government Solutions				Total
	Balance as of December 30, 2012		$	35.6		$	560.9			$	596.5
	Retrospective adjustments		—			(0.1		)		(0.1		)
	Balance as of December 30, 2012 after retrospective adjustments		$	35.6		$	560.8			$	596.4
Schedule of intangible assets	'
	The following table sets forth information for finite-lived and indefinite-lived intangible assets (in millions):
		As of December 30, 2012											As of September 29, 2013
		Gross			Accumulated				Net				Gross		Accumulated			Net
		Value			Amortization				Value				Value		Amortization			Value
	Acquired finite-lived intangible assets:
	Customer relationships	$	97.7		$	(36.2	)		$	61.5			$	97.7	$	(49.4	)	$	48.3
	Contracts and backlog	80			(64.3		)		15.7				80		(75.2		)	4.8
	Developed technology and technical know-how	22.1			(6.4		)		15.7				22.1		(8.0		)	14.1
	Trade names	6.1			(1.2		)		4.9				6.1		(2.7		)	3.4
	Favorable operating lease	1.8			(0.4		)		1.4				1.8		(0.5		)	1.3
	Total finite-lived intangible assets	207.7			(108.5		)		99.2				207.7		(135.8		)	71.9
	Acquired indefinite-lived intangible assets:
	Trade names	6.9			—				6.9				6.9		—			6.9
	Total indefinite-lived intangible assets	6.9			—				6.9				6.9		—			6.9
	Total intangible assets	$	214.6		$	(108.5	)		$	106.1			$	214.6	$	(135.8	)	$	78.8

Inventoried_Costs_Tables

Inventoried Costs (Tables)	9 Months Ended
	Sep. 29, 2013
Inventory Disclosure [Abstract]	'
Schedule of inventoried costs	'
	Inventoried costs consisted of the following components (in millions):
		December 30,			September 29,
		2012			2013
	Raw materials	$	48.4		$	44.4
	Work in process	36.5			33.3
	Finished goods	7.3			5
	Supplies and other	2.2			1.9
	Subtotal inventoried costs	94.4			84.6
	Less: Customer advances and progress payments	(0.1		)	(1.2		)
	Total inventoried costs	$	94.3		$	83.4

Stockholders_Equity_Tables

Stockholders' Equity (Tables)	9 Months Ended
	Sep. 29, 2013
Equity [Abstract]	'
Summary of changes in stockholders' equity	'
	A summary of the changes in stockholders’ equity is provided below (in millions):
		For the Nine Months Ended
		September 30, 2012				September 29, 2013
	Stockholders’ equity at beginning of period	$	312.6			$	324.1
	Comprehensive loss:
	Net loss	(24.4		)		(29.8		)
	Foreign currency translation	(0.4		)		—
	Total comprehensive loss	(24.8		)		(29.8		)
	Additional paid-in-capital from the issuance of common stock for cash	97				—
	Additional paid-in-capital from the issuance of commons stock in connection with acquisitions	23.8				—
	Stock-based compensation	4.6				6
	Employee stock purchase plan and restricted stock units settled in cash	(0.4		)		1.6
	Restricted stock units traded for taxes	(0.2		)		(0.2		)
	Stockholders’ equity at end of period	$	412.6			$	301.7
Components of accumulated other comprehensive loss	'
	The components of accumulated other comprehensive loss are as follows (in millions):
		For the Nine Months Ended
		30-Sep-12				29-Sep-13
	Cumulative translation adjustment	$	(0.3	)		$	(0.3	)
	Post retirement benefit reserve adjustment net of tax expense	(0.3		)		(0.5		)
	Total accumulated other comprehensive loss	$	(0.6	)		$	(0.8	)
Rollforward of common stock outstanding	'
	Common stock issued by the Company for the nine months ended September 30, 2012 and September 29, 2013 was as follows (in millions):
		For the nine Months Ended
		September 30, 2012			September 29, 2013
	Shares outstanding at beginning of the period	32.4			56.6
	Stock issued for employee stock purchase plan, stock options and restricted stock units exercised	0.1			0.4
	Common stock issued for cash	20			—
	Common stock issued for acquisitions	4			—
	Shares outstanding at end of the period	56.5			57

Net_Income_Loss_Per_Common_Sha1

Net Income (Loss) Per Common Share (Tables)	9 Months Ended
	Sep. 29, 2013
Earnings Per Share [Abstract]	'
Schedule of earnings per share, basic and diluted	'
		For the Three Months Ended						For the Nine Months Ended
	(In millions, except earnings per share)	September 30,			September 29,			September 30,			September 29,
		2012			2013			2012			2013
	Loss from continuing operations (A)	$	(4.4	)	$	(9.5	)	$	(21.8	)	$	(25.0	)
	Weighted average outstanding shares of common stock (B)	56.6			57.1			43.8			56.7
	Dilutive effect of employee stock options and awards	—			—			—			—
	Common stock and common stock equivalents (C)	56.6			57.1			43.8			56.7
	Loss per share:
	Basic (A/B)	$	(0.08	)	$	(0.17	)	$	(0.50	)	$	(0.44	)
	Diluted (A/C)	$	(0.08	)	$	(0.17	)	$	(0.50	)	$	(0.44	)

Income_Taxes_Tables

Income Taxes (Tables)	9 Months Ended
	Sep. 29, 2013
Income Tax Disclosure [Abstract]	'
Schedule of components of income tax expense (benefit)	'
	A reconciliation of the total income tax provision to the amount computed by applying the statutory federal income tax rate of 35% to loss from continuing operations before income tax provision for the three and nine months ended September 30, 2012 and September 29, 2013 is as follows (in millions):
		For the Three Months Ended						For the Nine Months Ended
		September 30,			September 29,			September 30,			September 29,
		2012			2013			2012			2013
	Income tax benefit at federal statutory rate	$	(0.9	)	$	(3.3	)	$	(6.3	)	$	(7.7	)
	State and foreign taxes, net of federal tax benefit and valuation allowance	0.5			—			1.6			1.6
	Nondeductible expenses and other	1.3			—			2			0.4
	Impact of indefinite lived deferred tax liabilities	0.6			0.2			2.1			2.9
	Increase (decrease) in reserves for uncertain tax positions	0.1			(0.1		)	0.1			(1.7		)
	Increase (decrease) in federal valuation allowance	(0.3		)	3.4			4.3			7.4
	Total	$	1.3		$	0.2		$	3.8		$	2.9

Discontinued_Operations_Tables

Discontinued Operations (Tables)	9 Months Ended
	Sep. 29, 2013
Discontinued Operations and Disposal Groups [Abstract]	'
Schedule of income statement and balance sheet disclosures for discontinued operations	'
	The following table presents the results of discontinued operations (in millions):
		For the Three Months Ended					For the Nine Months Ended
		September 30, 2012		September 29, 2013			September 30, 2012			September 29, 2013
	Revenue	$	6	$	—		$	13.3		$	3.6
	Net income (loss) before taxes	0.2		(0.4		)	(2.7		)	(4.8		)
	Provision for income taxes	—		—			(0.1		)	—
	Net income (loss) after taxes	$	0.2	$	(0.4	)	$	(2.6	)	$	(4.8	)
	The following is a summary of the assets and liabilities of discontinued operations, which are in other current assets, other non-current assets, other current liabilities and other long-term liabilities in the accompanying condensed consolidated balance sheets as of December 30, 2012 and September 29, 2013 (in millions):
		December 30,		September 29,
		2012		2013
	Accounts receivable, net	$	3.4	$	—
	Inventoried costs	3		—
	Other current assets	0.2		—
	Current assets of discontinued operations	6.6		—
	Property and equipment, net	0.4		—
	Other non-current assets	0.4		—
	Non-current assets of discontinued operations	$	0.8	$	—
	Accounts payable and accrued expenses	$	4.4	$	2.9
	Billings in excess of costs and earnings on uncompleted contracts	0.1		—
	Other current liabilities	0.4		0.3
	Current liabilities of discontinued operations	4.9		3.2
	Other long-term liabilities	0.3		—
	Long-term liabilities of discontinued operations	$	0.3	$	—

Debt_Tables

Debt (Tables)

9 Months Ended

Sep. 29, 2013

Debt Disclosure [Abstract]

'

Fair value of long-term debt

'

Carrying amounts and the related estimated fair values of the Company’s long-term debt financial instruments not measured at fair value on a recurring basis at December 30, 2012 and September 29, 2013 are presented in the following table:

As of December 30, 2012

As of September 29, 2013

$ in millions

Principal

Carrying

Fair Value

Principal

Carrying

Fair Value

Amount

Amount

Total Long-term debt including current portion

$

630.7

$

649.4

$

690.5

$

630

$

645.6

$

686.6

Segment_Information_Tables

Segment Information (Tables)	9 Months Ended
	Sep. 29, 2013
Segment Reporting [Abstract]	'
Schedule of segment revenues, operating income, and assets	'
	Revenues, depreciation and amortization, and operating income generated by the Company’s current reporting segments for the three and nine month periods ended September 30, 2012 and September 29, 2013 are as follows (in millions):
		Three Months Ended						Nine Months Ended
		September 30, 2012			September 29, 2013			September 30, 2012			September 29, 2013
	Revenues:
	Kratos Government Solutions
	Service revenues	$	72.8		$	57		$	202.4		$	180.9
	Product sales	150.7			117.6			365.8			379.9
	Total Kratos Government Solutions	223.5			174.6			568.2			560.8
	Public Safety & Security
	Service revenues	52.8			51.8			137.4			154.1
	Product sales	—			—			—			—
	Total Public Safety & Security	52.8			51.8			137.4			154.1
	Total revenues	$	276.3		$	226.4		$	705.6		$	714.9
	Depreciation & amortization:
	Kratos Government Solutions	$	15.7		$	12.1		$	39.9		$	38
	Public Safety & Security	0.9			0.8			2.6			2.7
	Total depreciation and amortization	$	16.6		$	12.9		$	42.5		$	40.7
	Operating income:
	Kratos Government Solutions	$	14		$	6.4		$	32.4		$	23.8
	Public Safety & Security	3.3			1.8			7.3			5.7
	Unallocated corporate expense, net	(3.2		)	(2.1		)	(9.1		)	(3.1		)
	Total operating income	$	14.1		$	6.1		$	30.6		$	26.4

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 29, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Schedule of Product Warranty Liabilities	'
	The changes in the Company's aggregate product warranty liabilities, which are included in other current liabilities and other long term-liabilities on the Company's condensed consolidated balance sheets, were as follows (in millions):
		Nine Months Ended
		September 30,			September 29,
		2012			2013
	Balance at beginning of the period	$	4.6		$	5.2
	Costs accrued and revenues deferred	—			0.3
	Warranty liabilities assumed from acquisitions	1.2			—
	Settlements made (in cash or kind) and revenues recognized	(0.7		)	(0.6		)
	Balance at end of period	5.1			4.9
	Less: Current portion	(5.1		)	(4.6		)
	Non-current accrued product warranty and deferred warranty revenue	$	—		$	0.3

Condensed_Consolidating_Financ1

Condensed Consolidating Financial Statements (Tables)	9 Months Ended
	Sep. 29, 2013
Condensed Consolidating Financial Statements [Abstract]	'
Schedule of Condensed Balance Sheet	'
	Condensed Consolidating Balance Sheet
	30-Dec-12
	(Unaudited)
		Parent Company			Guarantors on a Combined Basis			Non-Guarantors on a Combined Basis			Eliminations			Consolidated
	Assets
	Current Assets:
	Cash and cash equivalents	$	37.8		$	(4.0	)	$	15.2		$	—		$	49
	Accounts receivable, net	—			253.5			18.4			—			271.9
	Amounts due from affiliated companies	480.2			—			—			(480.2		)	—
	Inventoried costs	—			75.4			18.9			—			94.3
	Other current assets	9.1			28			3.1			—			40.2
	Total current assets	527.1			352.9			55.6			(480.2		)	455.4
	Property, plant and equipment, net	1.3			74.7			9.6			—			85.6
	Goodwill	—			574.7			21.7			—			596.4
	Intangible assets, net	—			103.4			2.7			—			106.1
	Investment in subsidiaries	439.8			28.8			—			(468.6		)	—
	Amounts due from affiliated companies	—			24			—			(24.0		)	—
	Other assets	17.6			22.4			0.4			—			40.4
	Total assets	$	985.8		$	1,180.90		$	90		$	(972.8	)	$	1,283.90
	Liabilities and Stockholders' Equity
	Current liabilities:
	Accounts payable	$	2.8		$	75.2		$	5.6		$	—		$	83.6
	Accrued expenses	7			42.3			3.4			—			52.7
	Accrued compensation	2.9			41.8			3.1			—			47.8
	Billings in excess of costs and earnings on uncompleted contracts	—			40.5			3.2			—			43.7
	Deferred income tax liability	—			28.9			—			—			28.9
	Amounts due to affiliated companies	—			455.1			25.1			(480.2		)	—
	Other current liabilities	1.1			19.1			1.9			—			22.1
	Total current liabilities	13.8			702.9			42.3			(480.2		)	278.8
	Long-term debt, net of current portion	643.6						4.8			—			648.4
	Amounts due to affiliated companies	—			—			24			(24.0		)	—
	Other long-term liabilities	4.3			26.2			2.1			—			32.6
	Total liabilities	661.7			729.1			73.2			(504.2		)	959.8
	Total stockholders' equity	324.1			451.8			16.8			(468.6		)	324.1
	Total liabilities and stockholders' equity	$	985.8		$	1,180.90		$	90		$	(972.8	)	$	1,283.90
	Condensed Consolidating Balance Sheet
	29-Sep-13
	(Unaudited)
		Parent Company			Guarantors on a Combined Basis			Non-Guarantors on a Combined Basis			Eliminations			Consolidated
	Assets
	Current Assets:
	Cash and cash equivalents	$	34.2		$	(3.4	)	$	19		$	—		$	49.8
	Accounts receivable, net	—			248.6			20.4			—			269
	Amounts due from affiliated companies	450.8			—			—			(450.8		)	—
	Inventoried costs	—			67.8			15.6			—			83.4
	Other current assets	9.5			14.7			2.9			—			27.1
	Total current assets	494.5			327.7			57.9			(450.8		)	429.3
	Amounts due from affiliated companies, long-term	—			24			—			(24.0		)	—
	Property, plant and equipment, net	1.9			72.3			10.3			—			84.5
	Goodwill	—			574.7			21.7			—			596.4
	Intangible assets, net	—			77.1			1.7			—			78.8
	Investment in subsidiaries	463.9			33.1			—			(497.0		)	—
	Other assets	13.8			21.7			0.2			—			35.7
	Total assets	$	974.1		$	1,130.60		$	91.8		$	(971.8	)	$	1,224.70
	Liabilities and Stockholders' Equity
	Current liabilities:
	Accounts payable	$	3		$	51		$	3.7		$	—		$	57.7
	Accrued expenses	22.8			40.9			3.7			—			67.4
	Accrued compensation	2.2			31.2			3.7			—			37.1
	Billings in excess of costs and earnings on uncompleted contracts	—			44.7			6.5			—			51.2
	Deferred income tax liability	—			29			—			—			29
	Amounts due to affiliated companies	—			428.9			21.9			(450.8		)	—
	Other current liabilities	1.3			11.5			1			—			13.8
Total current liabilities	29.3			637.2			40.5			(450.8		)	256.2
Long-term debt, net of current portion	640.6			—			4			—			644.6
Amounts due to affiliated companies	—			—			24			(24.0		)	—
Other long-term liabilities	2.5			17.5			2.2			—			22.2
Total liabilities	672.4			654.7			70.7			(474.8		)	923
Total stockholders' equity	301.7			475.9			21.1			(497.0		)	301.7
Total liabilities and stockholders' equity	$	974.1		$	1,130.60		$	91.8		$	(971.8	)	$	1,224.70
Schedule of Condensed Statement of Operations and Comprehensive Income	'
	Condensed Consolidating Statement of Operations and Comprehensive Income (Loss)
	Three Months Ended September 30, 2012
	(Unaudited)
		Parent Company			Guarantors on a Combined Basis			Non-Guarantors on a Combined Basis			Eliminations			Consolidated
	Service revenues	$	—		$	124.9		$	0.7		$	—		$	125.6
	Product sales	—			136.8			17			(3.1		)	150.7
	Total revenues	—			261.7			17.7			(3.1		)	276.3
	Cost of service revenues	—			97.8			0.5			—			98.3
	Cost of product sales	—			96.1			10.9			(3.1		)	103.9
	Total costs	—			193.9			11.4			(3.1		)	202.2
	Gross profit	—			67.8			6.3			—			74.1
	Selling, general and administrative expenses	4.5			47.2			3.8			—			55.5
	Research and development expenses	—			4.3			0.2			—			4.5
	Operating income (loss) from continuing operations	(4.5		)	16.3			2.3			—			14.1
	Other income (expense):
	Interest expense, net	17.6			(0.1		)	0.1			—			17.6
	Other income (expense), net	—			0.1			(0.5		)	—			(0.4		)
	Total other income and expense, net	17.6			—			(0.4		)	—			17.2
	Income (loss) from continuing operations before income taxes	(22.1		)	16.3			2.7			—			(3.1		)
	Provision for income taxes from continuing operations	—			0.9			0.4			—			1.3
	Income (loss) from continuing operations	(22.1		)	15.4			2.3			—			(4.4		)
	Income (loss) from discontinued operations	—			(0.5		)	0.7			—			0.2
	Equity in net income (loss) of subsidiaries	17.9			3			—			(20.9		)	—
	Net income (loss)	$	(4.2	)	$	17.9		$	3		$	(20.9	)	$	(4.2	)
	Comprehensive income (loss)	$	(4.4	)	$	17.9		$	2.8		$	(20.7	)	$	(4.4	)
	Condensed Consolidating Statement of Operations and Comprehensive Income (Loss)
	Three Months Ended September 29, 2013
	(Unaudited)
		Parent Company			Guarantors on a Combined Basis			Non-Guarantors on a Combined Basis			Eliminations			Consolidated
	Service revenues	$	—		$	107.6		$	1.2		$	—		$	108.8
	Product sales	—			103.9			17.5			(3.8		)	117.6
	Total revenues	—			211.5			18.7			(3.8		)	226.4
	Cost of service revenues	—			81.7			0.7			—			82.4
	Cost of product sales	—			82.2			13.3			(3.8		)	91.7
	Total costs	—			163.9			14			(3.8		)	174.1
	Gross profit	—			47.6			4.7			—			52.3
	Selling, general and administrative expenses	1.4			36.2			3.8			—			41.4
	Research and development expenses	—			4.7			0.1			—			4.8
	Operating income (loss) from continuing operations	(1.4		)	6.7			0.8			—			6.1
	Other income (expense):
	Interest expense, net	(16.2		)	0.1			(0.1		)	—			(16.2		)
	Other income (expense), net	—			0.2			0.6			—			0.8
	Total other income and expense, net	(16.2		)	0.3			0.5			—			(15.4		)
	Income (loss) from continuing operations before income taxes	(17.6		)	7			1.3			—			(9.3		)
	Provision (benefit) for income taxes from continuing operations	—			(0.1		)	0.3			—			0.2
	Income (loss) from continuing operations	(17.6		)	7.1			1			—			(9.5		)
	Income (loss) from discontinued operations	—			(0.4		)	—			—			(0.4		)
	Equity in net income (loss) of subsidiaries	7.7			1			—			(8.7		)	—
	Net income (loss)	$	(9.9	)	$	7.7		$	1		$	(8.7	)	$	(9.9	)
	Comprehensive income (loss)	$	(10.0	)	$	7.7		$	0.9		$	(8.6	)	$	(10.0	)
	Condensed Consolidating Statement of Operations and Comprehensive Income (Loss)
	Nine Months Ended September 30, 2012
	(Unaudited)
		Parent Company			Guarantors on a Combined Basis			Non-Guarantors on a Combined Basis			Eliminations			Consolidated
	Service revenues	$	—		$	337.9		$	1.9		$	—		$	339.8
	Product sales	—			329.4			46			(9.6		)	365.8
	Total revenues	—			667.3			47.9			(9.6		)	705.6
	Cost of service revenues	—			263.5			1.3			—			264.8
	Cost of product sales	—			231			30.2			(9.6		)	251.6
	Total costs	—			494.5			31.5			(9.6		)	516.4
	Gross profit	—			172.8			16.4			—			189.2
	Selling, general and administrative expenses	9.3			126.1			10.3			—			145.7
	Research and development expenses	—			12.2			0.7			—			12.9
Operating (loss) income from continuing operations	(9.3		)	34.5			5.4			—			30.6
Other income expense:
Interest expense, net	49.7			(0.2		)	0.4			—			49.9
Other expense, net	(0.3		)	—			(1.0		)	—			(1.3		)
Total other expense, net	49.4			(0.2		)	(0.6		)	—			48.6
Income (loss) from continuing operations before income taxes	(58.7		)	34.7			6			—			(18.0		)
Provision for income taxes from continuing operations	—			3.1			0.7			—			3.8
Income (loss) from continuing operations	(58.7		)	31.6			5.3			—			(21.8		)
Loss from discontinued operations	—			(3.3		)	0.7			—			(2.6		)
Equity in net income (loss) of subsidiaries	34.3			6			—			(40.3		)	—
Net income (loss)	(24.4		)	34.3			6			(40.3		)	(24.4		)
Comprehensive income (loss)	$	(24.8	)	$	34.3		$	5.6		$	(39.9	)	$	(24.8	)
Condensed Consolidating Statement of Operations and Comprehensive Income (Loss)
Nine Months Ended September 29, 2013
(Unaudited)
	Parent Company			Guarantors on a Combined Basis			Non-Guarantors on a Combined Basis			Eliminations			Consolidated
Service revenues	$	—		$	332.4		$	2.6		$	—		$	335
Product sales	—			338.1			55.1			(13.3		)	379.9
Total revenues	—			670.5			57.7			(13.3		)	714.9
Cost of service revenues	—			252.5			1.8			—			254.3
Cost of product sales	—			255.7			39.7			(13.3		)	282.1
Total costs	—			508.2			41.5			(13.3		)	536.4
Gross profit	—			162.3			16.2			—			178.5
Selling, general and administrative expenses	5.1			122.4			10.1			—			137.6
Research and development expenses	—			13.7			0.8			—			14.5
Operating (loss) income from continuing operations	(5.1		)	26.2			5.3			—			26.4
Other income expense:
Interest expense, net	(48.4		)	0.1			(0.4		)	—			(48.7		)
Other expense, net	—			0.3			(0.1		)	—			0.2
Total other expense, net	(48.4		)	0.4			(0.5		)	—			(48.5		)
Income (loss) from continuing operations before income taxes	(53.5		)	26.6			4.8			—			(22.1		)
Provision for income taxes from continuing operations	0.5			1.9			0.5			—			2.9
Income (loss) from continuing operations	(54.0		)	24.7			4.3			—			(25.0		)
Loss from discontinued operations	0.1			(4.9		)	—			—			(4.8		)
Equity in net income (loss) of subsidiaries	24.1			4.3			—			(28.4		)	—
Net income (loss)	$	(29.8	)	$	24.1		$	4.3		$	(28.4	)	$	(29.8	)
Comprehensive income (loss)	$	(29.8	)	$	24.1		$	4.3		$	(28.4	)	$	(29.8	)
Schedule of Condensed Cash Flow Statement	'
	Condensed Consolidating Statement of Cash Flows
	Nine Months Ended September 30, 2012
	(Unaudited)
		Parent Company			Guarantors on a Combined Basis			Non-Guarantors on a Combined Basis			Eliminations			Consolidated
	Net cash provided by (used in) operating activities	$	(32.5	)	$	61.6		$	6		$	—		$	35.1
	Investing activities:
	Cash paid for acquisitions, net of cash acquired	(149.4		)	—			—			—			(149.4		)
	(Increase) decrease in restricted cash	(0.4		)	0.9			—			—			0.5
	Capital expenditures	(0.4		)	(10.1		)	(1.5		)	—			(12.0		)
	Net cash used in investing activities from continuing operations	(150.2		)	(9.2		)	(1.5		)	—			(160.9		)
	Financing activities:
	Proceeds from the issuance of common stock for cash, net of issuance costs	97			—			—			—			97
	Cash paid for contingent acquisition consideration	—			(2.5		)	—			—			(2.5		)
	Debt issuance costs	(1.2		)	—			—			—			(1.2		)
	Borrowings under line of credit	40												40
	Repayment of debt	(40.0		)	—			(0.8		)	—			(40.8		)
	Financing from affiliated companies	55.7			(55.7		)	—			—			—
	Other, net	(0.5		)	(0.4		)	—			—			(0.9		)
	Net cash provided by (used in) financing activities from continuing operations	151			(58.6		)	(0.8		)	—			91.6
	Net cash flows of continuing operations	(31.7		)	(6.2		)	3.7			—			(34.2		)
	Net operating cash flows from discontinued operations	—			2.1			—			—			2.1
	Effect of exchange rate changes on cash and cash equivalents	—			—			0.1			—			0.1
	Net increase (decrease) in cash and cash equivalents	$	(31.7	)	$	(4.1	)	$	3.8		$	—		$	(32.0	)
	Condensed Consolidating Statement of Cash Flows
	Nine Months Ended September 29, 2013
	(Unaudited)
		Parent Company			Guarantors on a Combined Basis			Non-Guarantors on a Combined Basis			Eliminations			Consolidated
	Net cash provided by (used in) operating activities	$	(33.4	)	$	40.7		$	3.7		$	—		$	11
	Investing activities:
	Cash paid for acquisitions, net of cash acquired	—			2.2			—			—			2.2
	Decrease in restricted cash	—			0.5			—			—			0.5
	Other, net	—			0.4			—			—			0.4
	Capital expenditures	(1.0		)	(9.3		)	(1.9		)	—			(12.2		)
	Net cash used in investing activities from continuing operations	(1.0		)	(6.2		)	(1.9		)	—			(9.1		)
	Financing activities:
	Repayment of debt	—			—			(0.8		)	—			(0.8		)
	Cash paid for contingent acquisition consideration	—			(2.1		)	—			—			(2.1		)
	Financings from affiliated companies	29.6			(32.4		)	2.8			—			—
	Other, net	1.2			—			—			—			1.2
	Net cash provided by (used in) financing activities from continuing operations	30.8			(34.5		)	2			—			(1.7		)
	Net cash flows of continuing operations	(3.6		)	—			3.8			—			0.2
	Net operating cash flows from discontinued operations	—			0.5			—			—			0.5
	Effect of exchange rate changes on cash and cash equivalents	—			—			0.1			—			0.1
	Net increase (decrease) in cash and cash equivalents	$	(3.6	)	$	0.5		$	3.9		$	—		$	0.8

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Sep. 29, 2013	Sep. 30, 2012	Sep. 29, 2013	Sep. 30, 2012	Dec. 30, 2012
Significant Accounting Policies Disclosure [Line Items]	'	'	'	'	'
Fiscal year duration	'	'	'364 days	'	'371 days
First quarter duration	'	'280 days	'273 days	'	'
Reduction in excess facility accrual	$6.80	'	($6.80)	$0	'
Minimum	'	'	'	'	'
Significant Accounting Policies Disclosure [Line Items]	'	'	'	'	'
Fiscal year duration	'	'	'364 days	'	'
Maximum	'	'	'	'	'
Significant Accounting Policies Disclosure [Line Items]	'	'	'	'	'
Fiscal year duration	'	'	'371 days	'	'

Acquisitions_Composite_Enginee

Acquisitions - Composite Engineering, Inc. (Details) (USD $)	9 Months Ended			0 Months Ended		3 Months Ended	9 Months Ended		0 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 29, 2013	Sep. 30, 2012	Sep. 29, 2013	Jul. 02, 2012	14-May-12	Sep. 29, 2013	Sep. 29, 2013	Jul. 02, 2012	Jul. 02, 2012
			Revolving credit facility	Composite Engineering, Inc.	Composite Engineering, Inc.	Composite Engineering, Inc.	Composite Engineering, Inc.	Composite Engineering, Inc.	Composite Engineering, Inc.
								Revolving credit facility	Restricted Stock Units (RSUs)
									Management
Business Acquisition [Line Items]	'	'	'	'	'	'	'	'	'
Consideration transferred	'	'	'	$164	'	'	'	'	'
Aggregate amount of cash paid	'	'	'	135	'	'	'	'	'
Number of shares given as part of purchase price	'	'	'	4	'	'	'	'	'
Purchase price per share	'	'	'	$5.94	$5	'	'	'	'
Common stock exchanged as consideration, value	'	'	'	23.8	'	'	'	'	'
Amount of cash paid placed in escrow	'	'	'	10.7	'	'	'	'	'
Working capital adjustment paid to the Company	'	'	'	1	'	'	'	'	'
Consideration transferred, retirement of acquiree's debt	'	'	'	2.5	'	'	'	'	'
Consideration transferred, settlement of pre-existing accounts receivable	'	'	'	3	'	'	'	'	'
Additional tax liability incurred	'	'	'	1.6	'	'	'	'	'
Estimate of tax deductible goodwill and intangible assets	'	'	'	140.6	'	'	'	'	'
Tax deductible goodwill, deduction realization period	'	'	'	'15 years	'	'	'	'	'
Number of shares issued as part of long-term employment agreements	'	'	'	'	'	'	'	'	2
Fair value of shares issued as part of long-term employment agreements	'	'	'	'	'	'	'	'	11.9
Share-based compensation, period for recognition	'	'	'	'	'	'	'	'	'4 years
Common stock issued for acquisitions	0	4	'	20	20	'	'	'	'
Gross proceeds from issuance of common stock	'	'	'	'	100	'	'	'	'
Proceeds from the issuance of common stock	0	97	'	'	97	'	'	'	'
Outstanding borrowings	'	'	0	'	'	'	'	40	'
Acquired accounts receivable, gross	'	'	'	9.3	'	'	'	'	'
Revenues of CEI included in the Company's financial statements	'	'	'	'	'	23.8	76.8	'	'
Operating income (loss) of CEI included in the Company's financial statements	'	'	'	'	'	$7.40	$14.20	'	'

Acquisitions_Critical_Infrastr

Acquisitions - Critical Infrastructure Business (Details) (Critical Infrastructure Business, USD $)	0 Months Ended	3 Months Ended
In Millions, unless otherwise specified	Dec. 30, 2011	Sep. 29, 2013
Critical Infrastructure Business	'	'
Business Acquisition [Line Items]	'	'
Consideration transferred	$18.80	'
Recurring revenues, percentage	'	15.00%
Business Combination, Acquired Receivables [Abstract]	'	'
Acquired accounts receivable, gross	24.4	'
Acquired accounts receivable, estimated uncollectible	$1	'

Acquisitions_Assets_Acquired_a

Acquisitions - Assets Acquired and Liabilities Assumed (Details) (USD $)	Sep. 29, 2013	Dec. 30, 2012	Jul. 02, 2012	Dec. 30, 2011
In Millions, unless otherwise specified			Composite Engineering, Inc.	Critical Infrastructure Business
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]	'	'	'	'
Cash	'	'	$8.90	'
Accounts receivable	'	'	9.3	23.4
Inventoried costs	'	'	12.3	'
Other current assets	'	'	8.9	'
Property and equipment	'	'	8.1	'
Intangible assets	'	'	38	2
Goodwill	596.4	596.4	104.2	2.6
Other assets	'	'	'	0.5
Total assets	'	'	189.7	28.5
Current liabilities	'	'	-25.7	-9.7
Net assets acquired	'	'	$164	$18.80

Acquisitions_Pro_Forma_Financi

Acquisitions - Pro Forma Financial Information (Details) (Composite Engineering, Inc., USD $)	9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2012
Composite Engineering, Inc.	'
Business Acquisition [Line Items]	'
Pro forma revenues	$754.30
Pro forma net loss before tax	-27.6
Pro forma net loss	-31.4
Net loss attributable to the registrant	($21.80)
Basic and diluted pro forma loss per share (in dollars per share)	($0.46)

Acquisitions_Pro_Forma_Financi1

Acquisitions - Pro Forma Financial Information, Nonrecurring Adjustments (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 29, 2013	Sep. 30, 2012	Sep. 29, 2013	Sep. 30, 2012
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]	'	'	'	'
Merger and acquisition expenses	$0.20	$0.30	($2.30)	$2.70
Intangible amortization	9	13	27.3	32.4
Net change in stock compensation expense	'	'	6	4.6
Composite Engineering, Inc.	'	'	'	'
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]	'	'	'	'
Merger and acquisition expenses	'	'	0.8	'
Composite Engineering, Inc. | Acquisition related expenses	'	'	'	'
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]	'	'	'	'
Intangible amortization	'	'	'	8
Net change in stock compensation expense	'	'	'	$1.40
Increase in weighted average common shares outstanding for shares issued and not already included in the weighted average common shares outstanding (in shares)	'	'	'	24

Acquisitions_Contingent_Acquis

Acquisitions - Contingent Acquisition Consideration (Details) (DEI Services Corporation, USD $)	1 Months Ended
In Millions, unless otherwise specified	Apr. 30, 2012	Sep. 29, 2013
DEI Services Corporation	'	'
Business Acquisition, Contingent Consideration [Line Items]	'	'
Cumulative amount of contingent consideration paid	'	$5
Cash payments	$2.10	'

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets - Goodwill (Details) (USD $)	9 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended	1 Months Ended	3 Months Ended
In Millions, unless otherwise specified	Sep. 29, 2013	Dec. 30, 2012	Sep. 29, 2013	Dec. 30, 2012	Dec. 30, 2012	Sep. 29, 2013	Jun. 30, 2012	Jun. 24, 2012	Dec. 30, 2012	Dec. 30, 2012	Dec. 30, 2012
			Public Safety and Security	Public Safety and Security	Kratos Government Solutions	Kratos Government Solutions	Discontinued operations	Discontinued operations	Previously reported	Previously reported	Previously reported
										Public Safety and Security	Kratos Government Solutions
Goodwill [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Goodwill impairment charge associated with discontinued operations	'	'	'	'	$82	'	$1.50	$1.50	'	'	'
Percentage that goodwill fair value exceeded its carrying value	'	'	'	'	'	7.40%	'	'	'	'	'
Goodwill	596.4	596.4	'	35.6	560.8	'	'	'	596.5	35.6	560.9
Retrospective adjustments	-0.1	'	0	'	'	-0.1	'	'	'	'	'
Accumulated impairment losses	$247.40	$247.40	$18.30	$18.30	$229.10	$229.10	'	'	'	'	'

Goodwill_and_Intangible_Assets3

Goodwill and Intangible Assets - Purchased Intangible Assets (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 29, 2013	Sep. 30, 2012	Sep. 29, 2013	Sep. 30, 2012	Dec. 30, 2012
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Gross Value	$207.70	'	$207.70	'	$207.70
Accumulated Amortization	-135.8	'	-135.8	'	-108.5
Net Value	71.9	'	71.9	'	99.2
Gross Value	6.9	'	6.9	'	6.9
Gross Value	214.6	'	214.6	'	214.6
Net Value	78.8	'	78.8	'	106.1
Consolidated amortization expense related to intangible assets subject to amortization	9	13	27.3	32.4	'
Customer relationships	'	'	'	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Gross Value	97.7	'	97.7	'	97.7
Accumulated Amortization	-49.4	'	-49.4	'	-36.2
Net Value	48.3	'	48.3	'	61.5
Contracts and backlog	'	'	'	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Gross Value	80	'	80	'	80
Accumulated Amortization	-75.2	'	-75.2	'	-64.3
Net Value	4.8	'	4.8	'	15.7
Developed technology and technical know-how	'	'	'	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Gross Value	22.1	'	22.1	'	22.1
Accumulated Amortization	-8	'	-8	'	-6.4
Net Value	14.1	'	14.1	'	15.7
Trade names	'	'	'	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Gross Value	6.1	'	6.1	'	6.1
Accumulated Amortization	-2.7	'	-2.7	'	-1.2
Net Value	3.4	'	3.4	'	4.9
Favorable operating lease	'	'	'	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Gross Value	1.8	'	1.8	'	1.8
Accumulated Amortization	-0.5	'	-0.5	'	-0.4
Net Value	1.3	'	1.3	'	1.4
Trade names	'	'	'	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Gross Value	$6.90	'	$6.90	'	$6.90

Inventoried_Costs_Details

Inventoried Costs (Details) (USD $)	Sep. 29, 2013	Dec. 30, 2012
In Millions, unless otherwise specified
Inventory Disclosure [Abstract]	'	'
Raw materials	$44.40	$48.40
Work in process	33.3	36.5
Finished goods	5	7.3
Supplies and other	1.9	2.2
Subtotal inventoried costs	84.6	94.4
Less: customer advances and progress payments	-1.2	-0.1
Total inventoried costs	$83.40	$94.30

Stockholders_Equity_Narrative_

Stockholders' Equity - Narrative (Details) (USD $)	9 Months Ended		0 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 29, 2013	Sep. 30, 2012	Jul. 02, 2012	14-May-12
			Composite Engineering, Inc.	Composite Engineering, Inc.
Business Acquisition [Line Items]	'	'	'	'
Common stock issued for acquisitions	0	4	20	20
Purchase price per share	'	'	$5.94	$5
Gross proceeds from issuance of common stock	'	'	'	$100
Proceeds from the issuance of common stock	$0	$97	'	$97

Stockholders_Equity_Summary_of

Stockholders' Equity - Summary of Changes in Stockholders' Equity (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 29, 2013	Sep. 30, 2012	Sep. 29, 2013	Sep. 30, 2012
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'
Stockholders’ equity at beginning of period	'	'	$324.10	$312.60
Comprehensive loss:	'	'	'	'
Net loss	-9.9	-4.2	-29.8	-24.4
Foreign currency translation	'	'	0	-0.4
Comprehensive loss	-10	-4.4	-29.8	-24.8
Additional paid-in-capital from the issuance of common stock for cash	'	'	0	97
Additional paid-in-capital from the issuance of commons stock in connection with acquisitions	'	'	0	23.8
Stock-based compensation	'	'	6	4.6
Employee stock purchase plan and restricted stock units settled in cash	'	'	1.6	-0.4
Restricted stock units traded for taxes	'	'	-0.2	-0.2
Stockholders’ equity at end of period	$301.70	$412.60	$301.70	$412.60

Stockholders_Equity_Accumulate

Stockholders' Equity - Accumulated Other Comprehensive Loss (Details) (USD $)	3 Months Ended	9 Months Ended
In Millions, unless otherwise specified	Sep. 29, 2013	Sep. 29, 2013	Dec. 30, 2012	Sep. 30, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Total accumulated other comprehensive loss	($0.80)	($0.80)	($0.80)	($0.60)
Reclassifications from other comprehensive income	0	0	'	'
Cumulative translation adjustment	'	'	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Total accumulated other comprehensive loss	-0.3	-0.3	'	-0.3
Post retirement benefit reserve adjustment net of tax expense	'	'	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Total accumulated other comprehensive loss	($0.50)	($0.50)	'	($0.30)

Stockholders_Equity_Rollforwar

Stockholders' Equity - Rollforward of Common Stock Outstanding (Details)	9 Months Ended
	Sep. 29, 2013	Sep. 30, 2012
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'
Shares outstanding at beginning of the period	56,613,024	32,400,000
Stock issued for employee stock purchase plan, stock options and restricted stock units exercised	400,000	100,000
Common stock issued for cash	0	20,000,000
Common stock issued for acquisitions	0	4,000,000
Shares outstanding at end of the period	57,048,005	56,500,000

Net_Income_Loss_Per_Common_Sha2

Net Income (Loss) Per Common Share (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 29, 2013	Sep. 30, 2012	Sep. 29, 2013	Sep. 30, 2012
Earnings Per Share [Abstract]	'	'	'	'
Loss from continuing operations (A)	($9.50)	($4.40)	($25)	($21.80)
Weighted average outstanding shares of common stock (B) (in shares)	57.1	56.6	56.7	43.8
Dilutive effect of employee stock options and awards (in shares)	0	0	0	0
Common stock and common stock equivalents (C) (in shares)	57.1	56.6	56.7	43.8
Basic (A/B) (in dollars per share)	($0.17)	($0.08)	($0.44)	($0.50)
Diluted (A/C) (in dollars per share)	($0.17)	($0.08)	($0.44)	($0.50)

Income_Taxes_Narrative_Details

Income Taxes - Narrative (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 29, 2013	Sep. 30, 2012	Dec. 30, 2012
Income Tax Contingency [Line Items]	'	'	'
Unrecognized tax benefits that if recognized would affect effective tax rate	'	'	$13.40
Unrecognized tax benefits increase related to the CEI acquisition	0.1	'	'
Unrecognized tax benefits reduction relating to expiration of statutes of limitations	3.1	'	'
Income tax penalties and interest expense	0.1	0.3	'
Benefit for interest and penalties related to reversal of prior positions	0.2	0.1	'
Continuing operations	'	'	'
Income Tax Contingency [Line Items]	'	'	'
Unrecognized tax benefits reduction relating to expiration of statutes of limitations	$1.60	'	'

Income_Taxes_Income_Tax_Provis

Income Taxes - Income Tax Provision Reconciliation (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 29, 2013	Sep. 30, 2012	Sep. 29, 2013	Sep. 30, 2012
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]	'	'	'	'
Federal statutory income tax rate	'	35.00%	35.00%	35.00%
Income tax benefit at federal statutory rate	($3.30)	($0.90)	($7.70)	($6.30)
State and foreign taxes, net of federal benefit and valuation allowance	0	0.5	1.6	1.6
Nondeductible expenses and other	0	1.3	0.4	2
Impact of indefinite lived deferred tax liabilities and state law changes	0.2	0.6	2.9	2.1
Increase (decrease) in reserves for uncertain tax positions	-0.1	0.1	-1.7	0.1
Increase (decrease) in federal valuation allowance	3.4	-0.3	7.4	4.3
Total	$0.20	$1.30	$2.90	$3.80

Discontinued_Operations_Detail

Discontinued Operations (Details) (USD $)	1 Months Ended	3 Months Ended			9 Months Ended		12 Months Ended		1 Months Ended	3 Months Ended
In Millions, unless otherwise specified	Apr. 30, 2013	Sep. 29, 2013	Mar. 31, 2013	Sep. 30, 2012	Sep. 29, 2013	Sep. 30, 2012	Dec. 30, 2012	Jun. 24, 2012	Jun. 30, 2012	Jun. 24, 2012
								buyer	Discontinued operations	Discontinued operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'	'	'	'	'	'	'	'	'
Goodwill impairment charge associated with discontinued operations	'	'	'	'	'	'	'	'	$1.50	$1.50
Number of buyers of divested business	'	'	'	'	'	'	'	2	'	'
Total cash and assumption of liabilities for divested operations	'	0.8	'	'	0.8	'	'	'	'	'
Cash received for divested operations	0.5	'	'	'	'	'	0.3	'	'	'
Impairment charge related to revised estimate of the fair value of divested operations	'	'	1.2	'	'	'	'	'	'	'
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]	'	'	'	'	'	'	'	'	'	'
Revenue	'	0	'	6	3.6	13.3	'	'	'	'
Net income (loss) before taxes	'	-0.4	'	0.2	-4.8	-2.7	'	'	'	'
Provision for income taxes	'	0	'	0	0	-0.1	'	'	'	'
Net income (loss) after taxes	'	-0.4	'	0.2	-4.8	-2.6	'	'	'	'
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract]	'	'	'	'	'	'	'	'	'	'
Accounts receivable, net	'	0	'	'	0	'	3.4	'	'	'
Inventoried costs	'	0	'	'	0	'	3	'	'	'
Other current assets	'	0	'	'	0	'	0.2	'	'	'
Current assets of discontinued operations	'	0	'	'	0	'	6.6	'	'	'
Property and equipment, net	'	0	'	'	0	'	0.4	'	'	'
Other non-current assets	'	0	'	'	0	'	0.4	'	'	'
Non-current assets of discontinued operations	'	0	'	'	0	'	0.8	'	'	'
Accounts payable and accrued expenses	'	2.9	'	'	2.9	'	4.4	'	'	'
Billings in excess of costs and earnings on uncompleted contracts	'	0	'	'	0	'	0.1	'	'	'
Other current liabilities	'	0.3	'	'	0.3	'	0.4	'	'	'
Current liabilities of discontinued operations	'	3.2	'	'	3.2	'	4.9	'	'	'
Other long-term liabilities	'	0	'	'	0	'	0.3	'	'	'
Long-term liabilities of discontinued operations	'	$0	'	'	$0	'	$0.30	'	'	'

Debt_Issuance_of_10_Senior_Sec

Debt - Issuance of 10% Senior Secured Notes due 2017 (Details) (USD $)	Sep. 29, 2013	Dec. 30, 2012	Sep. 29, 2013	Jul. 27, 2011	Mar. 25, 2011	19-May-10	Sep. 29, 2013	Sep. 29, 2013	Sep. 29, 2013	Sep. 29, 2013
			Senior notes	Senior notes	Senior notes	Senior notes	Senior notes	Senior notes	Senior notes	Senior notes
			Senior Notes due June 2017	Senior Notes due June 2017	Senior Notes due June 2017	Senior Notes due June 2017	Senior Notes due June 2017	Senior Notes due June 2017	Senior Notes due June 2017	Senior Notes due June 2017
							Between 6/1/2014 and 6/1/2015	Between 6/1/2015 and 6/1/2016	After 6/1/2016	Prior to 6/1/2013
Debt Instrument [Line Items]	'	'	'	'	'	'	'	'	'	'
Stated interest rate percentage	'	'	10.00%	'	'	'	'	'	'	'
Principal amount outstanding	$630,000,000	$630,700,000	$625,000,000	$115,000,000	$285,000,000	$225,000,000	'	'	'	'
Long-term debt premium	$15,600,000	$18,700,000	'	$5,800,000	$20,000,000	'	'	'	'	'
Effective interest rate	'	'	'	8.90%	8.50%	'	'	'	'	'
Fixed charge coverage ratio	'	'	2	'	'	'	'	'	'	'
Redemption price as percentage of aggregate principal amount	'	'	'	'	'	'	105.00%	102.50%	100.00%	110.00%
Permitted redemption amount as percentage of aggregate principal amount	'	'	'	'	'	'	'	'	'	35.00%

Debt_1100_million_Credit_Facil

Debt - $110.0 million Credit Facility (Details) (USD $)

9 Months Ended

0 Months Ended

0 Months Ended

Share data in Millions, unless otherwise specified

Sep. 29, 2013

Sep. 30, 2012

Jul. 02, 2012

14-May-12

Sep. 29, 2013

4-May-12

Nov. 14, 2011

Jul. 27, 2011

Jul. 02, 2012

Jul. 27, 2011

Jul. 27, 2011

Jul. 27, 2011

Jul. 27, 2011

Jul. 27, 2011

Jul. 27, 2011

Jul. 27, 2011

Jul. 27, 2011

Sep. 29, 2013

Jul. 27, 2011

Jul. 27, 2011

CEI

CEI

Revolving credit facility

Revolving credit facility

Revolving credit facility

Revolving credit facility

Revolving credit facility

Revolving credit facility

Revolving credit facility

LIBOR base rate

LIBOR base rate

LIBOR base rate

Base rate other than LIBOR

Base rate other than LIBOR

Base rate other than LIBOR

Letter of credit

Letter of credit

Swing line loan

CEI

Minimum

Maximum

Minimum

Maximum

Minimum

Maximum

Line of Credit Facility [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum borrowing capacity

'

'

'

'

$110,000,000

'

$90,000,000

$65,000,000

'

'

'

'

'

'

'

'

'

'

$50,000,000

$10,000,000

Maturity period

'

'

'

'

'

'

'

'5 years

'

'

'

'

'

'

'

'

'

'

'

'

Fixed charge coverage ratio

'

'

'

'

'

'

'

'

'

1.25

'

'

'

'

'

'

'

'

'

'

Maximum possible borrowing capacity subject to application and bank approval

'

'

'

'

'

135,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Common stock issued for acquisitions

0

4

20

20

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Description of variable rate basis

'

'

'

'

'

'

'

'

'

'

'

'LIBOR

'

'

'federal funds rate

'

'

'

'

'

Basis spread on variable rate

'

'

'

'

'

'

'

'

'

'

'

'

3.00%

3.75%

'

1.00%

1.75%

'

'

'

Base rate (the greater of prime rate or 0.5% over federal funds rate)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.50%

'

'

'

'

'

Base rate (floor, 1.0% over one-month LIBOR)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.00%

'

'

'

'

'

Commitment fee

'

'

'

'

'

'

'

'

'

0.50%

0.75%

'

'

'

'

'

'

'

'

'

Outstanding borrowings

'

'

'

'

0

'

'

'

40,000,000

'

'

'

'

'

'

'

'

15,100,000

'

'

Remaining borrowing capacity

'

'

'

'

$74,600,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt_Debt_Acquired_in_Acquisit

Debt - Debt Acquired in Acquisition of Herley (Details) (USD $)	Sep. 29, 2013	Dec. 30, 2012	Mar. 25, 2011	Sep. 29, 2013
			10-year term loan	10-year term loan
Debt Instrument [Line Items]	'	'	'	'
Principal amount outstanding	$630,000,000	$630,700,000	$10,000,000	'
Maturity period	'	'	'10 years	'
Carrying amount	645,600,000	649,400,000	'	5,000,000
Quarterly installment payment - principal	'	'	$300,000	'
Basis spread on variable rate	'	'	1.50%	'

Debt_Fair_Value_of_Longterm_De

Debt - Fair Value of Long-term Debt (Details) (USD $)	Sep. 29, 2013	Dec. 30, 2012
Debt Disclosure [Abstract]	'	'
Principal amount outstanding	$630,000,000	$630,700,000
Carrying amount	645,600,000	649,400,000
Fair value	686,600,000	690,500,000
Long-term debt premium	$15,600,000	$18,700,000

Significant_Customers_Details

Significant Customers (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 29, 2013	Sep. 30, 2012	Sep. 29, 2013	Sep. 30, 2012
Revenue, Major Customer [Line Items]	'	'	'	'
Sales to the U.S. Government - amount	$226.40	$276.30	$714.90	$705.60
Kratos Government Solutions	'	'	'	'
Revenue, Major Customer [Line Items]	'	'	'	'
Sales to the U.S. Government - amount	174.6	223.5	560.8	568.2
U.S. Government | Kratos Government Solutions	'	'	'	'
Revenue, Major Customer [Line Items]	'	'	'	'
Sales to the U.S. Government - amount	$143.40	$162.90	$460.90	$443.80
Sales to the U.S. Government - percentage of total revenue	63.00%	59.00%	64.00%	63.00%

Segment_Information_Details

Segment Information (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 29, 2013	Sep. 30, 2012	Sep. 29, 2013	Sep. 30, 2012
			Segment
Segment Reporting Information [Line Items]	'	'	'	'
Number of principal business segments	'	'	2	'
Service revenues	$108.80	$125.60	$335	$339.80
Product sales	117.6	150.7	379.9	365.8
Revenues	226.4	276.3	714.9	705.6
Depreciation and amortization	12.9	16.6	40.7	42.5
Operating income	6.1	14.1	26.4	30.6
Kratos Government Solutions	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Service revenues	57	72.8	180.9	202.4
Product sales	117.6	150.7	379.9	365.8
Revenues	174.6	223.5	560.8	568.2
Depreciation and amortization	12.1	15.7	38	39.9
Operating income	6.4	14	23.8	32.4
Public Safety and Security	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Service revenues	51.8	52.8	154.1	137.4
Product sales	0	0	0	0
Revenues	51.8	52.8	154.1	137.4
Depreciation and amortization	0.8	0.9	2.7	2.6
Operating income	1.8	3.3	5.7	7.3
Unallocated corporate expense, net	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Operating income	($2.10)	($3.20)	($3.10)	($9.10)

Commitments_and_Contingencies_1

Commitments and Contingencies (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 29, 2013	Sep. 30, 2012
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]	'	'
Balance at beginning of the period	$5.20	$4.60
Costs accrued and revenues deferred	0.3	0
Warranty liabilities assumed from acquisitions	0	1.2
Settlements made (in cash or kind) and revenues recognized	-0.6	-0.7
Balance at end of period	4.9	5.1
Less: Current portion	-4.6	-5.1
Non-current accrued product warranty and deferred warranty revenue	$0.30	$0
Product Warranties | Minimum	'	'
Warranty Coverage Period [Line Items]	'	'
Warranty coverage period	'1 year	'
Product Warranties | Maximum	'	'
Warranty Coverage Period [Line Items]	'	'
Warranty coverage period	'10 years	'

Condensed_Consolidating_Financ2

Condensed Consolidating Financial Statements - Balance Sheet (Details) (USD $)	Sep. 29, 2013	Dec. 30, 2012	Sep. 30, 2012	Dec. 25, 2011	Sep. 29, 2013	Dec. 30, 2012	Sep. 29, 2013	Dec. 30, 2012	Sep. 29, 2013	Dec. 30, 2012	Sep. 29, 2013	Dec. 30, 2012	Sep. 29, 2013	Jul. 27, 2011	Mar. 25, 2011	19-May-10
					Parent Company	Parent Company	Guarantors on a Combined Basis	Guarantors on a Combined Basis	Non-Guarantors on a Combined Basis	Non-Guarantors on a Combined Basis	Eliminations	Eliminations	Senior notes	Senior notes	Senior notes	Senior notes
													Senior Notes due June 2017	Senior Notes due June 2017	Senior Notes due June 2017	Senior Notes due June 2017
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'
Principal amount outstanding	$630,000,000	$630,700,000	'	'	'	'	'	'	'	'	'	'	$625,000,000	$115,000,000	$285,000,000	$225,000,000
Current assets:	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'
Cash and cash equivalents	49,800,000	49,000,000	37,600,000	69,600,000	34,200,000	37,800,000	-3,400,000	-4,000,000	19,000,000	15,200,000	0	0	'	'	'	'
Accounts receivable, net	269,000,000	271,900,000	'	'	0	0	248,600,000	253,500,000	20,400,000	18,400,000	0	0	'	'	'	'
Amounts due from affiliated companies	0	0	'	'	450,800,000	480,200,000	0	0	0	0	-450,800,000	-480,200,000	'	'	'	'
Inventoried costs	83,400,000	94,300,000	'	'	0	0	67,800,000	75,400,000	15,600,000	18,900,000	0	0	'	'	'	'
Other current assets	27,100,000	40,200,000	'	'	9,500,000	9,100,000	14,700,000	28,000,000	2,900,000	3,100,000	0	0	'	'	'	'
Total current assets	429,300,000	455,400,000	'	'	494,500,000	527,100,000	327,700,000	352,900,000	57,900,000	55,600,000	-450,800,000	-480,200,000	'	'	'	'
Property, plant and equipment, net	84,500,000	85,600,000	'	'	1,900,000	1,300,000	72,300,000	74,700,000	10,300,000	9,600,000	0	0	'	'	'	'
Goodwill	596,400,000	596,400,000	'	'	0	0	574,700,000	574,700,000	21,700,000	21,700,000	0	0	'	'	'	'
Intangible assets, net	78,800,000	106,100,000	'	'	0	0	77,100,000	103,400,000	1,700,000	2,700,000	0	0	'	'	'	'
Investment in subsidiaries	0	0	'	'	463,900,000	439,800,000	33,100,000	28,800,000	0	0	-497,000,000	-468,600,000	'	'	'	'
Amounts due from affiliated companies	0	0	'	'	0	0	24,000,000	24,000,000	0	0	-24,000,000	-24,000,000	'	'	'	'
Other assets	35,700,000	40,400,000	'	'	13,800,000	17,600,000	21,700,000	22,400,000	200,000	400,000	0	0	'	'	'	'
Total assets	1,224,700,000	1,283,900,000	'	'	974,100,000	985,800,000	1,130,600,000	1,180,900,000	91,800,000	90,000,000	-971,800,000	-972,800,000	'	'	'	'
Current liabilities:	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'
Accounts payable	57,700,000	83,600,000	'	'	3,000,000	2,800,000	51,000,000	75,200,000	3,700,000	5,600,000	0	0	'	'	'	'
Accrued expenses	67,400,000	52,700,000	'	'	22,800,000	7,000,000	40,900,000	42,300,000	3,700,000	3,400,000	0	0	'	'	'	'
Accrued compensation	37,100,000	47,800,000	'	'	2,200,000	2,900,000	31,200,000	41,800,000	3,700,000	3,100,000	0	0	'	'	'	'
Billings in excess of costs and earnings on uncompleted contracts	51,200,000	43,700,000	'	'	0	0	44,700,000	40,500,000	6,500,000	3,200,000	0	0	'	'	'	'
Deferred income tax liability	29,000,000	28,900,000	'	'	0	0	29,000,000	28,900,000	0	0	0	0	'	'	'	'
Amounts due to affiliated companies	0	0	'	'	0	0	428,900,000	455,100,000	21,900,000	25,100,000	-450,800,000	-480,200,000	'	'	'	'
Other current liabilities	13,800,000	22,100,000	'	'	1,300,000	1,100,000	11,500,000	19,100,000	1,000,000	1,900,000	0	0	'	'	'	'
Total current liabilities	256,200,000	278,800,000	'	'	29,300,000	13,800,000	637,200,000	702,900,000	40,500,000	42,300,000	-450,800,000	-480,200,000	'	'	'	'
Long-term debt, net of current portion	644,600,000	648,400,000	'	'	640,600,000	643,600,000	0	'	4,000,000	4,800,000	0	0	'	'	'	'
Amounts due to affiliated companies	0	0	'	'	0	0	0	0	24,000,000	24,000,000	-24,000,000	-24,000,000	'	'	'	'
Other long-term liabilities	22,200,000	32,600,000	'	'	2,500,000	4,300,000	17,500,000	26,200,000	2,200,000	2,100,000	0	0	'	'	'	'
Total liabilities	923,000,000	959,800,000	'	'	672,400,000	661,700,000	654,700,000	729,100,000	70,700,000	73,200,000	-474,800,000	-504,200,000	'	'	'	'
Total stockholders' equity	301,700,000	324,100,000	'	'	301,700,000	324,100,000	475,900,000	451,800,000	21,100,000	16,800,000	-497,000,000	-468,600,000	'	'	'	'
Total liabilities and stockholders’ equity	$1,224,700,000	$1,283,900,000	'	'	$974,100,000	$985,800,000	$1,130,600,000	$1,180,900,000	$91,800,000	$90,000,000	($971,800,000)	($972,800,000)	'	'	'	'

Condensed_Consolidating_Financ3

Condensed Consolidating Financial Statements - Statement of Operations and Comprehensive Income (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 29, 2013	Sep. 30, 2012	Sep. 29, 2013	Sep. 30, 2012
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Service revenues	$108.80	$125.60	$335	$339.80
Product sales	117.6	150.7	379.9	365.8
Total revenues	226.4	276.3	714.9	705.6
Cost of service revenues	82.4	98.3	254.3	264.8
Cost of product sales	91.7	103.9	282.1	251.6
Total costs	174.1	202.2	536.4	516.4
Gross profit	52.3	74.1	178.5	189.2
Selling, general and administrative expenses	41.4	55.5	137.6	145.7
Research and development expenses	4.8	4.5	14.5	12.9
Operating income from continuing operations	6.1	14.1	26.4	30.6
Other income (expense):	'	'	'	'
Interest expense, net	16.2	17.6	48.7	49.9
Other income (expense), net	-0.8	-0.4	-0.2	-1.3
Total other expense, net	15.4	17.2	48.5	48.6
Loss from continuing operations before income taxes	-9.3	-3.1	-22.1	-18
Provision (benefit) for income taxes from continuing operations	0.2	1.3	2.9	3.8
Loss from continuing operations	-9.5	-4.4	-25	-21.8
Income (loss) from discontinued operations	-0.4	0.2	-4.8	-2.6
Equity in net income (loss) of subsidiaries	0	0	0	0
Net loss	-9.9	-4.2	-29.8	-24.4
Comprehensive income (loss)	-10	-4.4	-29.8	-24.8
Parent Company	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Service revenues	0	0	0	0
Product sales	0	0	0	0
Total revenues	0	0	0	0
Cost of service revenues	0	0	0	0
Cost of product sales	0	0	0	0
Total costs	0	0	0	0
Gross profit	0	0	0	0
Selling, general and administrative expenses	1.4	4.5	5.1	9.3
Research and development expenses	0	0	0	0
Operating income from continuing operations	-1.4	-4.5	-5.1	-9.3
Other income (expense):	'	'	'	'
Interest expense, net	16.2	17.6	48.4	49.7
Other income (expense), net	0	0	0	-0.3
Total other expense, net	16.2	17.6	48.4	49.4
Loss from continuing operations before income taxes	-17.6	-22.1	-53.5	-58.7
Provision (benefit) for income taxes from continuing operations	0	0	0.5	0
Loss from continuing operations	-17.6	-22.1	-54	-58.7
Income (loss) from discontinued operations	0	0	0.1	0
Equity in net income (loss) of subsidiaries	7.7	17.9	24.1	34.3
Net loss	-9.9	-4.2	-29.8	-24.4
Comprehensive income (loss)	-10	-4.4	-29.8	-24.8
Guarantors on a Combined Basis	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Service revenues	107.6	124.9	332.4	337.9
Product sales	103.9	136.8	338.1	329.4
Total revenues	211.5	261.7	670.5	667.3
Cost of service revenues	81.7	97.8	252.5	263.5
Cost of product sales	82.2	96.1	255.7	231
Total costs	163.9	193.9	508.2	494.5
Gross profit	47.6	67.8	162.3	172.8
Selling, general and administrative expenses	36.2	47.2	122.4	126.1
Research and development expenses	4.7	4.3	13.7	12.2
Operating income from continuing operations	6.7	16.3	26.2	34.5
Other income (expense):	'	'	'	'
Interest expense, net	-0.1	-0.1	-0.1	-0.2
Other income (expense), net	-0.2	0.1	-0.3	0
Total other expense, net	-0.3	0	-0.4	-0.2
Loss from continuing operations before income taxes	7	16.3	26.6	34.7
Provision (benefit) for income taxes from continuing operations	-0.1	0.9	1.9	3.1
Loss from continuing operations	7.1	15.4	24.7	31.6
Income (loss) from discontinued operations	-0.4	-0.5	-4.9	-3.3
Equity in net income (loss) of subsidiaries	1	3	4.3	6
Net loss	7.7	17.9	24.1	34.3
Comprehensive income (loss)	7.7	17.9	24.1	34.3
Non-Guarantors on a Combined Basis	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Service revenues	1.2	0.7	2.6	1.9
Product sales	17.5	17	55.1	46
Total revenues	18.7	17.7	57.7	47.9
Cost of service revenues	0.7	0.5	1.8	1.3
Cost of product sales	13.3	10.9	39.7	30.2
Total costs	14	11.4	41.5	31.5
Gross profit	4.7	6.3	16.2	16.4
Selling, general and administrative expenses	3.8	3.8	10.1	10.3
Research and development expenses	0.1	0.2	0.8	0.7
Operating income from continuing operations	0.8	2.3	5.3	5.4
Other income (expense):	'	'	'	'
Interest expense, net	0.1	0.1	0.4	0.4
Other income (expense), net	-0.6	-0.5	0.1	-1
Total other expense, net	-0.5	-0.4	0.5	-0.6
Loss from continuing operations before income taxes	1.3	2.7	4.8	6
Provision (benefit) for income taxes from continuing operations	0.3	0.4	0.5	0.7
Loss from continuing operations	1	2.3	4.3	5.3
Income (loss) from discontinued operations	0	0.7	0	0.7
Equity in net income (loss) of subsidiaries	0	0	0	0
Net loss	1	3	4.3	6
Comprehensive income (loss)	0.9	2.8	4.3	5.6
Eliminations	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Service revenues	0	0	0	0
Product sales	-3.8	-3.1	-13.3	-9.6
Total revenues	-3.8	-3.1	-13.3	-9.6
Cost of service revenues	0	0	0	0
Cost of product sales	-3.8	-3.1	-13.3	-9.6
Total costs	-3.8	-3.1	-13.3	-9.6
Gross profit	0	0	0	0
Selling, general and administrative expenses	0	0	0	0
Research and development expenses	0	0	0	0
Operating income from continuing operations	0	0	0	0
Other income (expense):	'	'	'	'
Interest expense, net	0	0	0	0
Other income (expense), net	0	0	0	0
Total other expense, net	0	0	0	0
Loss from continuing operations before income taxes	0	0	0	0
Provision (benefit) for income taxes from continuing operations	0	0	0	0
Loss from continuing operations	0	0	0	0
Income (loss) from discontinued operations	0	0	0	0
Equity in net income (loss) of subsidiaries	-8.7	-20.9	-28.4	-40.3
Net loss	-8.7	-20.9	-28.4	-40.3
Comprehensive income (loss)	($8.60)	($20.70)	($28.40)	($39.90)

Condensed_Consolidating_Financ4

Condensed Consolidating Financial Statements - Statement of Cash Flows (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 29, 2013	Sep. 30, 2012
Condensed Financial Statements, Captions [Line Items]	'	'
Net cash provided by (used in) operating activities	$11	$35.10
Investing activities:	'	'
Cash paid for acquisitions, net of cash acquired	2.2	-149.4
Decrease in restricted cash	0.5	0.5
Other, net	0.4	0
Capital expenditures	-12.2	-12
Net cash used in investing activities from continuing operations	-9.1	-160.9
Financing activities:	'	'
Proceeds from the issuance of common stock for cash, net of issuance costs	0	97
Cash paid for contingent acquisition consideration	-2.1	-2.5
Debt issuance costs	0	-1.2
Borrowings under credit facility	0	40
Repayment of debt	-0.8	-40.8
Financing from affiliated companies	0	0
Other, net	1.2	-0.9
Net cash provided by (used in) financing activities from continuing operations	-1.7	91.6
Net cash flows of continuing operations	0.2	-34.2
Net operating cash flows of discontinued operations	0.5	2.1
Effect of exchange rate changes on cash and cash equivalents	0.1	0.1
Net increase (decrease) in cash and cash equivalents	0.8	-32
Parent Company	'	'
Condensed Financial Statements, Captions [Line Items]	'	'
Net cash provided by (used in) operating activities	-33.4	-32.5
Investing activities:	'	'
Cash paid for acquisitions, net of cash acquired	0	-149.4
Decrease in restricted cash	0	-0.4
Other, net	0	'
Capital expenditures	-1	-0.4
Net cash used in investing activities from continuing operations	-1	-150.2
Financing activities:	'	'
Proceeds from the issuance of common stock for cash, net of issuance costs	'	97
Cash paid for contingent acquisition consideration	0	0
Debt issuance costs	'	-1.2
Borrowings under credit facility	'	40
Repayment of debt	0	-40
Financing from affiliated companies	29.6	55.7
Other, net	1.2	-0.5
Net cash provided by (used in) financing activities from continuing operations	30.8	151
Net cash flows of continuing operations	-3.6	-31.7
Net operating cash flows of discontinued operations	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	-3.6	-31.7
Guarantors on a Combined Basis	'	'
Condensed Financial Statements, Captions [Line Items]	'	'
Net cash provided by (used in) operating activities	40.7	61.6
Investing activities:	'	'
Cash paid for acquisitions, net of cash acquired	2.2	0
Decrease in restricted cash	0.5	0.9
Other, net	0.4	'
Capital expenditures	-9.3	-10.1
Net cash used in investing activities from continuing operations	-6.2	-9.2
Financing activities:	'	'
Proceeds from the issuance of common stock for cash, net of issuance costs	'	0
Cash paid for contingent acquisition consideration	-2.1	-2.5
Debt issuance costs	'	0
Repayment of debt	0	0
Financing from affiliated companies	-32.4	-55.7
Other, net	0	-0.4
Net cash provided by (used in) financing activities from continuing operations	-34.5	-58.6
Net cash flows of continuing operations	0	-6.2
Net operating cash flows of discontinued operations	0.5	2.1
Effect of exchange rate changes on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	0.5	-4.1
Non-Guarantors on a Combined Basis	'	'
Condensed Financial Statements, Captions [Line Items]	'	'
Net cash provided by (used in) operating activities	3.7	6
Investing activities:	'	'
Cash paid for acquisitions, net of cash acquired	0	0
Decrease in restricted cash	0	0
Other, net	0	'
Capital expenditures	-1.9	-1.5
Net cash used in investing activities from continuing operations	-1.9	-1.5
Financing activities:	'	'
Proceeds from the issuance of common stock for cash, net of issuance costs	'	0
Cash paid for contingent acquisition consideration	0	0
Debt issuance costs	'	0
Repayment of debt	-0.8	-0.8
Financing from affiliated companies	2.8	0
Other, net	0	0
Net cash provided by (used in) financing activities from continuing operations	2	-0.8
Net cash flows of continuing operations	3.8	3.7
Net operating cash flows of discontinued operations	0	0
Effect of exchange rate changes on cash and cash equivalents	0.1	0.1
Net increase (decrease) in cash and cash equivalents	3.9	3.8
Eliminations	'	'
Condensed Financial Statements, Captions [Line Items]	'	'
Net cash provided by (used in) operating activities	0	0
Investing activities:	'	'
Cash paid for acquisitions, net of cash acquired	0	0
Decrease in restricted cash	0	0
Other, net	0	'
Capital expenditures	0	0
Net cash used in investing activities from continuing operations	0	0
Financing activities:	'	'
Proceeds from the issuance of common stock for cash, net of issuance costs	'	0
Cash paid for contingent acquisition consideration	0	0
Debt issuance costs	'	0
Repayment of debt	0	0
Financing from affiliated companies	0	0
Other, net	0	0
Net cash provided by (used in) financing activities from continuing operations	0	0
Net cash flows of continuing operations	0	0
Net operating cash flows of discontinued operations	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	$0	$0