Business Acquisition [Axis] Business Acquisition [Axis] FTT Inc Florida Turbine Technologies, Inc. [Member] Florida Turbine Technologies, Inc. [Member] Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Total lease payments Lessee, Operating Lease, Liability, to be Paid Net income (loss) Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Recovery of doubtful accounts Accounts Receivable, Credit Loss Expense (Reversal) Total debt Long-Term Debt, Gross Entity Address, Postal Zip Code Entity Address, Postal Zip Code Property, plant and equipment, net Finance Lease, Right-of-Use Asset, after Accumulated Amortization Net cash used in continuing operations Net Cash Provided by (Used in) Continuing Operations Depreciation and amortization: Depreciation, Depletion and Amortization, Nonproduction [Abstract] Shares outstanding (in shares) Preferred Stock, Shares Outstanding 2024 Long-Term Debt, Maturity, Year Two Debt Instrument [Axis] Debt Instrument [Axis] Schedule of Intangible Assets (Indefinite-Lived) Schedule of Indefinite-Lived Intangible Assets [Table Text Block] Total present value of lease liabilities Finance Lease, Liability Revolving credit facility Line of Credit Facility, Maximum Borrowing Capacity Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Foreign Exchange Contract Foreign Exchange Contract [Member] Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Investing activities: Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Basis spread on variable rate percentage Debt Instrument, Basis Spread on Variable Rate Statistical Measurement [Domain] Statistical Measurement [Domain] 2026 Finance Lease, Liability, to be Paid, Year Four Thereafter Lessee, Operating Lease, Liability, Payments, Due After Year Four Lessee, Operating Lease, Liability, Payments, Due After Year Four Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-Lived Intangible Assets, Major Class Name [Domain] Deferred tax assets, net Deferred Tax Assets, Net Current period interest rate Debt Instrument, Interest Rate, Stated Percentage Operating leases Operating Lease, Weighted Average Discount Rate, Percent Schedule of Business Acquisitions by Acquisition, Contingent Consideration Schedule of Business Acquisitions by Acquisition, Contingent Consideration [Table Text Block] Additional paid-in capital Additional Paid in Capital, Common Stock Repayment of debt Repayments of Debt Effect of exchange rate changes on cash, cash equivalents and restricted cash Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations Property, plant and equipment, net Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Negotiation and settlement with the customer Contract with Customer Asset, Subject To Negotiation And Settlement With The Customer Contract with Customer Asset, Subject To Negotiation And Settlement With The Customer Amount agreed to settlement Contract with Customer, Asset, Reclassified to Receivable 2025 Finance Lease, Liability, to be Paid, Year Three Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Net income (loss) attributable to Kratos Net income (loss) Net Income (Loss) Attributable to Parent Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive securities excluded from computation of EPS (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Leases Lessee, Finance Leases [Text Block] 2022 Finance Lease, Liability, to be Paid, Remainder of Fiscal Year Schedule of Future Long-Term Debt Principal Payments Schedule of Maturities of Long-Term Debt [Table Text Block] Operating Leases Lessee, Operating Lease, Liability, to be Paid [Abstract] Net operating cash flows of discontinued operations Cash Provided by (Used in) Operating Activities, Discontinued Operations Equity Component [Domain] Equity Component [Domain] Secured Debt Secured Debt [Member] Weighted average common shares outstanding: Earnings Per Share Reconciliation [Abstract] Redemption percentage Debt Instrument, Redemption Price, Percentage Amortization Period [Axis] Amortization Period [Axis] Amortization Period Acquired Finite-Lived Intangible Assets [Line Items] Acquired Finite-Lived Intangible Assets [Line Items] Ownership [Axis] Ownership [Axis] Leases Lessee, Operating Leases [Text Block] Amortization of right of use assets - finance leases Finance Lease, Right-of-Use Asset, Amortization Contract assets Contract with Customer, Asset, after Allowance for Credit Loss Hedging Designation [Domain] Hedging Designation [Domain] Acquired finite-lived intangible assets: Finite-Lived Intangible Assets, Net [Abstract] Income (loss) from continuing operations (in dollars per share) Income (Loss) from Continuing Operations, Per Diluted Share Derivative Instrument [Axis] Derivative Instrument [Axis] Noncontrolling Interest [Abstract] Noncontrolling Interest [Abstract] Kratos Government Solutions KGS Kratos Government Solutions [Member] Kratos Government Solutions operating/reportable segment 2022 Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Goodwill [Line Items] Goodwill [Line Items] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Outstanding borrowings Long-Term Line of Credit Entity Address, State or Province Entity Address, State or Province Amortization of lease right-of-use assets Operating And Finance Lease, Right-of-Use Asset, Amortization Operating And Finance Lease, Right-of-Use Asset, Amortization Current portion of operating lease liabilities Current portion of operating lease liabilities Operating Lease, Liability, Current Derivative asset Derivative Asset Revenue Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual In-process research and development In Process Research and Development [Member] Contract with Customer, Basis of Pricing [Axis] Contract with Customer, Basis of Pricing [Axis] Sale of discontinued operations Proceeds from Divestiture of Businesses Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Accounts receivable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Property and equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Long-term debt, net of current portion Long-Term Debt, Excluding Current Maturities Total liabilities Liabilities Operating leases Operating Lease, Weighted Average Remaining Lease Term Percentage of voting interests acquired Business Acquisition, Percentage of Voting Interests Acquired Issuance of common stock for acquisitions Common stock issuance for acquisition Stock Issued During Period, Value, New Issues Finance leases: Finance Lease, Assets And Liabilities, Lessee [Abstract] Finance Lease, Assets And Liabilities, Lessee [Abstract] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Risks and Uncertainties [Abstract] Risks and Uncertainties [Abstract] Revolving Credit Facility Revolving Credit Facility [Member] Document Type Document Type SOFR Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Segments [Axis] Segments [Axis] Debt Debt Disclosure [Text Block] Finance Leases Finance Lease, Liability, to be Paid [Abstract] Product and Service [Domain] Product and Service [Domain] Operating activities: Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Entity Shell Company Entity Shell Company T for C T for C [Member] T for C [Member] Deferred income taxes Deferred Income Tax Expense (Benefit) Weighted-average discount rate: Weighted Average Discount Rate, Percent [Abstract] Weighted Average Discount Rate, Percent [Abstract] Nondeductible expenses and other Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount Number of shares issued (in shares) Business Acquisition, Equity Interest Issued or Issuable, Number of Shares 2023 Lessee, Operating Lease, Liability, to be Paid, Year One KTT CORE, LLC KTT CORE, LLC [Member] KTT CORE, LLC Developed technology Developed technology and technical know-how Developed Technology Rights [Member] 2025 Long-Term Debt, Maturity, Year Three Swing Line Loan Swing Line Loan [Member] Swing Line Loan [Member] Revenue Revenue Benchmark [Member] Consolidation Items [Domain] Consolidation Items [Domain] Schedule of Net Contract Assets (Liabilities) Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Document Period End Date Document Period End Date Operating lease liabilities Increase (Decrease) In Operating Lease Liabilities Increase (Decrease) In Operating Lease Liabilities Total assets Assets Debt Disclosure [Abstract] Debt Disclosure [Abstract] Earnings Per Share [Abstract] Earnings Per Share [Abstract] Premium Debt Instrument, Unamortized Premium Antidilutive Securities [Axis] Antidilutive Securities [Axis] Company's Training Solutions Company's Training Solutions [Member] Company's Training Solutions Payments to acquire businesses, amount not included holdback paid at later Payments to Acquire Businesses, Amount Not Included Holdback Paid at Later Payments to Acquire Businesses, Amount Not Included Holdback Paid at Later Accrued expenses Accrued Liabilities, Current Intangible assets acquired Finite-Lived Intangible Assets Acquired Net cash used in financing activities from continuing operations Net Cash Provided by (Used in) Financing Activities Operating income (loss) from continuing operations: Operating Income (Loss) [Abstract] Fair Value Long-Term Debt, Fair Value Contracts and backlog Contracts and Backlog [Member] Contracts and Backlog [Member] Accrued compensation Employee-related Liabilities, Current Line of Credit Line of Credit [Member] Variable lease cost (cost excluded from lease payments) Variable Lease, Cost Income (loss) from continuing operations before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Segments [Domain] Segments [Domain] Schedule of Goodwill [Table] Schedule of Goodwill [Table] Redeemable Noncontrolling Interest Noncontrolling Interest Disclosure [Text Block] Net Income (Loss) per Common Share Earnings Per Share [Text Block] Customer [Axis] Customer [Axis] Other long-term liabilities Finance Lease, Liability, Noncurrent Gross value Goodwill, Gross Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Schedule of Reconciliation of Income Tax Benefit at Statutory Rate to Income Tax Provision Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Loss on extinguishment of debt Loss on extinguishment of debt Gain (Loss) on Extinguishment of Debt Schedule of Intangible Assets (Finite-Lived) Schedule of Finite-Lived Intangible Assets [Table Text Block] Inventoried costs Inventoried costs Inventory, Net of Allowances, Customer Advances and Progress Billings Cash paid Payments to Acquire Businesses, Gross Derivative Contract [Domain] Derivative Contract [Domain] Gross profit Gross Profit Financing activities: Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Entity Registrant Name Entity Registrant Name Issuance of common stock for acquisitions (in shares) Stock Issued During Period, Shares, New Issues Line of credit amortization percentage Line Of Credit, Amortization Percentage Line Of Credit, Amortization Percentage Inventory Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory Customer relationships Customer Relationships [Member] Entity Address, City or Town Entity Address, City or Town Leases [Abstract] Leases [Abstract] Subsegments [Axis] Subsegments [Axis] Total stockholders’ equity Balance, beginning of period Balance, end of period Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Principles of Consolidation Consolidation, Policy [Policy Text Block] Minimum Minimum [Member] Balance, beginning of period Balance, end of period Stockholders' Equity Attributable to Noncontrolling Interest Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Entity Emerging Growth Company Entity Emerging Growth Company Par value (in dollars per share) Common Stock, Par or Stated Value Per Share Raw materials Inventory, Raw Materials, Net of Reserves Contract with Customer, Basis of Pricing [Domain] Contract with Customer, Basis of Pricing [Domain] Intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Stock compensation - excess tax benefits Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Amount Unamortized debt issuance costs Debt Issuance Costs, Net Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Payments to acquire business, subject to adjustments Payments To Acquire Business, Gross, Subject To Adjustments Payments To Acquire Business, Gross, Subject To Adjustments Trading Symbol Trading Symbol Entity File Number Entity File Number Research and development expenses Research and Development Expense Accrued interest Interest Payable, Current Less: Comprehensive income attributable to noncontrolling interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Disposal Group Classification [Axis] Disposal Group Classification [Axis] Proceeds from lines of credit Proceeds from Lines of Credit Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Less current portion Long-term Debt, Current Maturities, Gross Long-term Debt, Current Maturities, Gross Federal impact of research & development tax credits Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount Accounting Estimates Use of Estimates, Policy [Policy Text Block] Acquisitions Business Combination Disclosure [Text Block] Other expense: Other Nonoperating Income (Expense) [Abstract] Accounts payable Increase (Decrease) in Accounts Payable Net assets acquired, excluding cash Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Summary of Significant Accounting Policies Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Sales to the U.S. Government, percentage of total revenue (percent) Concentration Risk, Percentage Sales to the U.S. Government, amount Revenues Income Taxes Income Tax Disclosure [Text Block] Finished goods Inventory, Finished Goods, Net of Reserves Credit Facility [Domain] Credit Facility [Domain] Long-term liabilities of discontinued operations Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent Aggregate amortization expense for finite-lived intangible assets Amortization of Intangible Assets Schedule of Goodwill Schedule of Goodwill [Table Text Block] Loss per common share (in dollars per share) Earnings Per Share, Basic Restructuring expenses and other Impairment Charges And Adjustments To Unused Office Space Liability Impairment Charges And Adjustments To Unused Office Space Liability CTT Inc. CTT Inc. [Member] CTT Inc. 2025 Lessee, Operating Lease, Liability, to be Paid, Year Three Corporate activities Corporate, Non-Segment [Member] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Indefinite-lived Intangible Assets by Major Class [Axis] Indefinite-Lived Intangible Assets [Axis] Derivative Financial Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Prepaid expenses Prepaid Expense, Current Financing lease obligation incurred Finance lease liabilities arising from obtaining right-of-use assets Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Ownership [Domain] Ownership [Domain] Entity Interactive Data Current Entity Interactive Data Current Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] International Non-US Government [Member] Non-US Government [Member] Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Restricted stock issued and related taxes Restricted Stock, Value, Shares Issued Net of Tax Withholdings Changes in assets and liabilities, net of acquisitions: Increase (Decrease) in Operating Capital [Abstract] 2027 Long-Term Debt, Maturity, Year Five Accumulated Deficit Retained Earnings [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Term Loan A Term Loan A [Member] Term Loan A Total lease cost Lease, Cost Common Stock Common Stock [Member] Issuance of common stock for employee stock purchase plan and stock options Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Number of reportable segments Number of Reportable Segments Schedule of Lease Cost Lease, Cost [Table Text Block] Class of Stock [Axis] Class of Stock [Axis] Cosmic Advanced Engineering Solutions, Inc. Cosmic Advanced Engineering Solutions, Inc. [Member] Cosmic Advanced Engineering Solutions, Inc. Statement [Table] Statement [Table] Current period interest rate Debt Instrument, Interest Rate, Effective Percentage Document Quarterly Report Document Quarterly Report Letter of Credit Letter of Credit [Member] Total identifiable net assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Discontinued Operations and Disposal Groups [Abstract] Discontinued Operations and Disposal Groups [Abstract] Current assets: Assets, Current [Abstract] Expense for interest and penalties Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Operating lease liabilities, net of current portion Operating lease liabilities, net of current portion Operating Lease, Liability, Noncurrent Unbilled receivables, net Unbilled Receivables, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Indefinite-lived trade names Indefinite-Lived Intangible Assets (Excluding Goodwill) Accumulated deficit Retained Earnings (Accumulated Deficit) Disposal Group Name [Axis] Disposal Group Name [Axis] Accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Equity Components [Axis] Equity Components [Axis] Interest expense, net Interest Income (Expense), Nonoperating, Net Document Fiscal Year Focus Document Fiscal Year Focus Changes in noncontrolling interest (in shares) Increase From Subsidiary Equity Issuance Of Shares, In Noncontrolling Interest Increase From Subsidiary Equity Issuance Of Shares, In Noncontrolling Interest Statement [Line Items] Statement [Line Items] Payments under finance leases Finance lease - financing cash flows Finance Lease, Principal Payments U.S. Commercial and other customers US Commercial [Member] US Commercial [Member] Redeemable Noncontrolling Interest Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] Purchase price, in cash Disposal Group, Including Discontinued Operation, Consideration Cost plus fee Cost Plus Fee Contract [Member] Cost Plus Fee Contract [Member] Total intangible assets: gross value Intangible Assets (Excluding Goodwill), Gross Intangible Assets (Excluding Goodwill), Gross Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Total other expense, net Nonoperating Income (Expense) Variable Rate [Domain] Variable Rate [Domain] Gross Value Finite-Lived Intangible Assets, Gross Selling, general and administrative expenses Selling, General and Administrative Expense Southern Research Engineering Division Southern Research Engineering Division [Member] Southern Research Engineering Division Product sales Product [Member] Operating lease right-of-use assets Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Capital expenditures Payments to Acquire Productive Assets Document Transition Report Document Transition Report Local Phone Number Local Phone Number Operating income (loss) Total operating income (loss) from continuing operations Operating Income (Loss) Inventoried costs Increase (Decrease) in Inventories Disposed of by Sale Discontinued Operations, Disposed of by Sale [Member] Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Working capital adjustment Disposal Group, Including Discontinued Operation, Working Capital Adjustment Disposal Group, Including Discontinued Operation, Working Capital Adjustment Shares outstanding (in shares) Balance, beginning of period (in shares) Balance, end of period (in shares) Common Stock, Shares, Outstanding Service revenues Service [Member] Goodwill Goodwill Net Goodwill Income tax benefit Discontinued Operation, Tax Effect of Discontinued Operation Adjustments to reconcile income (loss) from continuing operations to net cash provided by (used in) operating activities from continuing operations: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Goodwill and Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Provision (benefit) for income taxes from continuing operations Expense (benefit) for income taxes from continuing operations Income Tax Expense (Benefit) Government Contracts Government Contracts Concentration Risk [Member] Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share 2026 Lessee, Operating Lease, Liability, to be Paid, Year Four Income Statement [Abstract] Income Statement [Abstract] Schedule of Revenue by Major Customers, by Reportiing Segments [Table] Schedule of Revenue by Major Customers, by Reporting Segments [Table] Additional Paid-In Capital Additional Paid-in Capital [Member] Document Fiscal Period Focus Document Fiscal Period Focus Basic income (loss) per common share attributable to Kratos: Earnings Per Share, Basic [Abstract] Total costs Cost of Goods and Services Sold Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Derivative liability Derivative Liability Significant Customers Concentration Risk Disclosure [Text Block] Schedule of Inventoried Costs Schedule of Inventory, Current [Table Text Block] Debt issuance costs Debt Issuance Costs, Gross Base Rate Base Rate [Member] Billing Status, Type [Axis] Billing Status, Type [Axis] Holdback to be paid at later date Payments to Acquire Businesses, Remaining Holdback Amount Payments to Acquire Businesses, Remaining Holdback Amount Common stock, $0.001 par value, 195,000,000 shares authorized; 125,947,889 and 123,987,424 shares issued and outstanding at September 25, 2022 and December 26, 2021, respectively Common Stock, Value, Issued Current liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities Income (loss) from discontinued operations (in dollars per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Senior Notes Senior Notes [Member] 6.5% Notes Six Point Five Percent Senior Secured Notes Due 2025 [Member] Six Point Five Percent Senior Secured Notes Due 2025 [Member] Restricted stock issued and related taxes (in shares) Restricted Stock, Shares Issued Net of Shares for Tax Withholdings Reportable Segments Operating Segments [Member] Short-term lease cost Short-Term Lease, Cost Shares authorized (in shares) Preferred Stock, Shares Authorized Liabilities for uncertain tax positions believed to be reasonably possible to expire within twelve months Decrease in Unrecognized Tax Benefits is Reasonably Possible Cash, cash equivalents and restricted cash at beginning of period Cash, cash equivalents and restricted cash at end of period Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Change in cumulative translation adjustment Other comprehensive loss, net of tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Less: Net income attributable to noncontrolling interest Net Income (Loss) Attributable to Noncontrolling Interest Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Less accumulated impairment Goodwill, Impaired, Accumulated Impairment Loss Current liabilities: Liabilities, Current [Abstract] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Proceeds from shares issued under equity plans Proceeds from Stock Options Exercised Proceeds from the issuance of long-term debt Proceeds from Issuance of Long-Term Debt Shares issued (in shares) Common Stock, Shares, Issued Current liabilities of discontinued operations Disposal Group, Including Discontinued Operation, Liabilities, Current Interest on lease liabilities - finance leases Finance Lease, Interest Expense Merger and acquisition expenses Business Combination, Acquisition Related Costs Other current liabilities Finance Lease, Liability, Current Amendment Flag Amendment Flag Net cash used in investing activities from continuing operations Net Cash Provided by (Used in) Investing Activities Operating lease cost Operating Lease, Cost Principal Principal Debt Instrument, Face Amount Comprehensive income (loss) attributable to Kratos Comprehensive Income (Loss), Net of Tax, Attributable to Parent Net cash provided by (used in) operating activities from continuing operations Net Cash Provided by (Used in) Operating Activities, Continuing Operations Total identifiable net liabilities assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Schedule of Segment Revenues, Depreciation and Amortization, and Operating Income (Loss) Schedule of Segment Reporting Information, by Segment [Table Text Block] Entity Current Reporting Status Entity Current Reporting Status Public Safety & Security Public Safety and Security [Member] Public Safety and Security [Member] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Other current liabilities Other Liabilities, Current Other assets Other Assets, Noncurrent Accrued compensation Increase (Decrease) in Employee Related Liabilities 2023 Finance Lease, Liability, to be Paid, Year One Depreciation and amortization Total depreciation and amortization Depreciation, Depletion and Amortization Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Amortization Period [Domain] Amortization Period [Domain] Amortization Period [Domain] Revenue Recognition, Multiple-deliverable Arrangements [Line Items] Revenue Recognition, Multiple-deliverable Arrangements [Line Items] Schedule of Recognized Identified Assets Acquired and Liabilities Assumed Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Unamortized debt issuance costs Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code 2024 Finance Lease, Liability, to be Paid, Year Two Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Operating lease - operating cash flows (fixed payments) Operating Lease, Payments Contract assets, net change Contract With Customer, Asset, Increase (Decrease) Contract With Customer, Asset, Increase (Decrease) Preferred Stock: Preferred Stock, Number of Shares, Par Value and Other Disclosure [Abstract] Income (loss) from discontinued operations (in dollars per share) Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax, Per Basic Share Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Fixed price Fixed-Price Contract [Member] Carrying Amount Total debt Long-term debt Long-Term Debt Other income (expense), net Other Nonoperating Income (Expense) Shares authorized (in shares) Common Stock, Shares Authorized Statement of Comprehensive Income [Abstract] Maximum Maximum [Member] Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Fiscal Year Fiscal Period, Policy [Policy Text Block] Billings in excess of costs and earnings on uncompleted contracts Increase (Decrease) in Contract with Customer, Liability Total current assets Assets, Current Designated as Hedging Instrument Designated as Hedging Instrument [Member] Schedule of Balance Sheet Information Assets And Liabilities, Lessee [Table Text Block] Assets And Liabilities, Lessee [Table Text Block] Payments for legal settlements Payments for Legal Settlements Revenue recognized Contract with Customer, Liability, Revenue Recognized Business Acquisition [Line Items] Business Acquisition [Line Items] Changes in noncontrolling interest Noncontrolling Interest, Period Increase (Decrease) Entity Small Business Entity Small Business Long-term debt, net of current portion Long-term Debt, Excluding Current Maturities, Gross Long-term Debt, Excluding Current Maturities, Gross Billings in excess of costs and earnings on uncompleted contracts Billings In Excess Of Cost1 Billings In Excess Of Cost1 Net Value Finite-Lived Intangible Assets, Net Income (loss) from continuing operations Income (loss) from continuing operations Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Line of Credit Facility [Table] Line of Credit Facility [Table] Expected timing of satisfaction, period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Schedule of Carrying Amounts and Estimated Fair Value of Long-Term Debt Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block] Revenue Recognition, Milestone Method [Table] Revenue Recognition, Milestone Method [Table] Income (loss) from discontinued operations before income taxes Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax Sublease income Sublease Income U.S. Government United States Government [Member] United States Government [Member] Accounts receivable Increase (Decrease) in Accounts Receivable Title of 12(b) Security Title of 12(b) Security Noncontrolling interest owned (as a percent) Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners Repayments of lines of credit Repayments of Lines of Credit Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Debt Instrument [Line Items] Debt Instrument [Line Items] Business Combination and Asset Acquisition [Abstract] Common Stock: Common Stock, Number of Shares, Par Value and Other Disclosure [Abstract] Issuance of common stock for employee stock purchase plan and stock options (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Debt issuance costs Payments of Debt Issuance Costs Total present value of lease liabilities Operating Lease, Liability Segment Information Segment Reporting Disclosure [Text Block] Total lease payments Finance Lease, Liability, to be Paid Net contract assets Contract With Customer, Asset (Liability), Net Contract With Customer, Asset (Liability), Net Schedule of Maturities of Financing Lease Liabilities Finance Lease, Liability, Fiscal Year Maturity [Table Text Block] Accrued expenses Increase (Decrease) in Other Accrued Liabilities Noncontrolling Interest [Table] Noncontrolling Interest [Table] Deferred tax liabilities Deferred Tax Liabilities, Net Liabilities and Stockholders’ Equity Liabilities and Equity [Abstract] Subsegments [Domain] Subsegments [Domain] 2022 Long-Term Debt, Maturity, Remainder of Fiscal Year Accounts payable Accounts Payable, Current Income (loss) from continuing operations (in dollars per share) Income (Loss) from Continuing Operations, Per Basic Share 2026 Long-Term Debt, Maturity, Year Four First And Second Year First And Second Year [Member] First And Second Year Hedging Designation [Axis] Hedging Designation [Axis] Write-off Write off of Deferred Debt Issuance Cost Premium redemption price percentage Debt Instrument, Premium Redemption Price, Percentage Debt Instrument, Premium Redemption Price, Percentage Entity Filer Category Entity Filer Category Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Operating income Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual Commitments and contingencies Commitments and Contingencies Security Exchange Name Security Exchange Name Useful life Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life Derivative notional amount Derivative, Notional Amount Common stock issuance for purchase of noncontrolling interests Stock Issued Preferred stock, $0.001 par value, 5,000,000 shares authorized, 0 shares outstanding at September 25, 2022 and December 26, 2021 Preferred Stock, Value, Issued Accrued interest Increase (Decrease) in Interest Payable, Net Redeemable noncontrolling interest Redeemable Noncontrolling Interest, Equity, Carrying Amount Letters of credit outstanding Letters of Credit Outstanding, Amount Amortization of deferred financing costs Amortization of Deferred Charges Operating leases: Operating Lease, Assets And Liabilities, Lessee [Abstract] Operating Lease, Assets And Liabilities, Lessee [Abstract] Total revenues Total Revenues Revenue from Contract with Customer, Excluding Assessed Tax Common stock consideration Common stock issued Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Unbilled receivables Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Unbilled Receivables Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Unbilled Receivables Cover [Abstract] Cover [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Net contract assets, net change Contract With Customer, Asset (Liability), Net Increase (Decrease) Contract With Customer, Asset (Liability), Net Increase (Decrease) Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Work in process Inventory, Work in Process, Net of Reserves Finance leases Finance Lease, Weighted Average Discount Rate, Percent Revenue Recognition Revenue from Contract with Customer [Text Block] Less: Cash acquired Cash Acquired from Acquisition Segment Reporting [Abstract] Segment Reporting [Abstract] Contract liabilities, net change Contract With Customer, Liability, Increase (Decrease) Contract With Customer, Liability, Increase (Decrease) Unbilled receivables Increase (Decrease) in Contract with Customer, Asset Stock Options and Awards Stock Options and Stock Awards [Member] Stock Options and Stock Awards [Member] Redeemable Noncontrolling Interest Noncontrolling Interest [Member] Unmanned Systems US Kratos Unmanned Systems [Member] Kratos Unmanned Systems [Member] Payments of employee taxes withheld from share-based awards Payment, Tax Withholding, Share-Based Payment Arrangement Total liabilities and stockholders’ equity Liabilities and Equity Debt instrument, term Maturity period Debt Instrument, Term Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Term Loan Payment on June 30, 2022 Term Loan Payment on June 30, 2022 [Member] Term Loan Payment on June 30, 2022 Net income (loss) Net Income (Loss) Attributable to Redeemable Noncontrolling Interest Total current liabilities Liabilities, Current, Including Deferred Income Tax Liabilities, Net Liabilities, Current, Including Deferred Income Tax Liabilities, Net Diluted income (loss) per common share attributable to Kratos: Earnings Per Share, Diluted [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Disposal Group Name [Domain] Disposal Group Name [Domain] Cash paid for acquisitions, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Current Fiscal Year End Date Current Fiscal Year End Date Less: imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Other current assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other Loss per common share (in dollars per share) Earnings Per Share, Diluted Intangible assets, net Total intangible assets: net value Intangible Assets, Net (Excluding Goodwill) Proceeds from sale of assets Proceeds from Sale of Property, Plant, and Equipment Subsidiary percent owned (as a percent) Noncontrolling Interest, Ownership Percentage by Parent Stock-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Consolidation Items [Axis] Consolidation Items [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Axis] New Credit Facility New Credit Facility [Member] New Credit Facility 2024 Lessee, Operating Lease, Liability, to be Paid, Year Two Proceeds from insurance Proceeds from Insurance Settlement, Investing Activities Other current assets Other Assets, Current Receivables Billing Status [Domain] Receivables Billing Status [Domain] Discontinued Operations Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Unrecognized tax benefits that if recognized would impact the effective tax rate for continuing operations Unrecognized Tax Benefits that Would Impact Effective Tax Rate Remaining performance obligation Revenue, Remaining Performance Obligation, Amount Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Income (loss) from discontinued operations Income (loss) from discontinued operations Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Schedule of Maturities of Operating Lease Liabilities Lessee, Operating Lease, Liability, Maturity [Table Text Block] Income tax receivable and payable Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable Entity Address, Address Line Two Entity Address, Address Line Two Entity Address, Address Line One Entity Address, Address Line One Unbilled Revenues Unbilled Revenues [Member] Contract liabilities Contract with Customer, Liability Product and Service [Axis] Product and Service [Axis] Class of Stock [Domain] Class of Stock [Domain] Other assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Finance leases Finance Lease, Weighted Average Remaining Lease Term Remaining borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Derivative Instruments and Hedging Activities Disclosure [Abstract] Trade names Trade names Trade Names [Member] Credit Facility [Axis] Credit Facility [Axis] Time and materials Time-and-Materials Contract [Member] Inventoried Costs Inventory Disclosure [Text Block] Schedule of Long-Term Debt and the Current Period Interest Rates Schedule of Long-Term Debt Instruments [Table Text Block] Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Entity Tax Identification Number Entity Tax Identification Number Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Schedule of Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Third, Fourth and Fifth Year Third, Fourth and Fifth Year [Member] Third, Fourth and Fifth Year Credit agreement borrowings Credit Agreement Borrowings Credit Agreement Borrowings Finance lease - cash paid for interest Finance Lease, Interest Payment on Liability New Revolving Credit Facility New Revolving Credit Facility [Member] New Revolving Credit Facility Litigation related charges Litigation Settlement, Expense Net decrease in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Entity Central Index Key Entity Central Index Key Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Repayments of secured debt Repayments of Secured Debt Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Aggregate purchase price Total consideration Business Combination, Consideration Transferred City Area Code City Area Code Assets Assets [Abstract] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Company's C5ISR Company's C5ISR [Member] Company's C5ISR Revenue, Major Customer [Line Items] Revenue, Major Customer [Line Items] Income tax expense (benefit) at federal statutory rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Thereafter Finance Lease, Liability, Payments, Due After Year Four Finance Lease, Liability, Payments, Due After Year Four Expected timing of satisfaction, percentage Revenue, Remaining Performance Obligation, Percentage Net Income (Loss) per Common Share Earnings Per Share, Policy [Policy Text Block] 2023 Long-Term Debt, Maturity, Year One Significant non-cash investing and financing activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Stock-based compensation Share-Based Payment Arrangement, Noncash Expense Variable Rate [Axis] Variable Rate [Axis] Less: imputed interest Finance Lease, Liability, Undiscounted Excess Amount Weighted-average remaining lease term (in years): Weighted Average Remaining Lease Term [Abstract] Weighted Average Remaining Lease Term [Abstract] Other long-term liabilities Other Liabilities, Noncurrent Decrease resulting from current period tax positions Unrecognized Tax Benefits, Decrease Resulting from Current Period Tax Positions Disposal Group Classification [Domain] Disposal Group Classification [Domain] Other liabilities Increase (Decrease) in Other Operating Liabilities Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Operating lease liabilities arising from obtaining right-of-use assets Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Customer [Domain] Customer [Domain]