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Interactive Data Current Entity Interactive Data Current Variable Rate [Axis] Variable Rate [Axis] Noncash or Part Noncash Acquisition, Fixed Assets Acquired Noncash or Part Noncash Acquisition, Fixed Assets Acquired Backlog Reduction due to Divestiture Backlog Reduction due to Divestiture Backlog Reduction due to Divestiture Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Small Business Entity Small Business Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent OBBBA [Member] OBBBA [Member] One Big Beautiful Bill Act Termination Date Trading Arrangement Termination Date Property, Plant, and Equipment [Line Items] Property, Plant, and Equipment [Line Items] Commercial Paper, Maximum Borrowing Capacity (Prior) Commercial Paper, Maximum Borrowing Capacity (Prior) Commercial Paper, Maximum Borrowing Capacity (Prior) Disposal Groups, Including Discontinued Operations, Disclosure Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Other current liabilities Other Liabilities, Current Liability for Uncertainty in Income Taxes, Noncurrent Liability for Uncertainty in Income Taxes, Noncurrent Marketable Securities Marketable Securities Other non-current assets Other Assets, Noncurrent Document Type Document Type Fixed-price [Member] Fixed-Price Contract [Member] Fair Value as of Grant Date Award Grant Date Fair Value Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Site Contingency [Line Items] Site Contingency [Line Items] Schedule of Change in Accounting Estimate [Table] Change in Accounting Estimate [Table] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Amount remaining under authorization for share repurchases Share Repurchase Program, Remaining Authorized, Amount Arrangement Duration Trading Arrangement Duration Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Proceeds from Issuance of Long-Term Debt Proceeds from Issuance of Long-Term Debt Local Phone Number Local Phone Number OPB Other Postretirement Benefits Plan [Member] Consolidation Items [Axis] Consolidation Items [Axis] California Franchise Tax Board California Franchise Tax Board [Member] Entity Address, Postal ZIP Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Changes in assets and liabilities: Increase (Decrease) in Operating Assets [Abstract] Earnings before income taxes Earnings before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Commitments and Contingencies Commitments and Contingencies Revenues Revenues Revenues Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Space Systems [Member] Space Systems [Member] Space Systems reporting segment. Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] Effect of Tax Legislation Enacted [Domain] Effect of Tax Legislation Enacted During the Period [Domain] Effect of Tax Legislation Enacted During the Period [Domain] Vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Inventoried costs, net Inventory, Net Change in other, net Other Comprehensive Income (Loss), Other Components, Net of Tax Other Comprehensive Income (Loss), Other Components, Net of Tax Award Type [Domain] Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount FAIR VALUE OF FINANCIAL INSTRUMENTS Fair Value Disclosures [Text Block] Fair Value, Inputs, Level 3 Fair Value, Inputs, Level 3 [Member] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] PEO Name PEO Name Accelerated Share Repurchase Initial Receipt (Shares) Accelerated Share Repurchase Initial Receipt (Shares) Accelerated Share Repurchase Initial Receipt (Shares) Geographical [Axis] Geographical [Axis] Leasehold Improvements [Member] Leasehold Improvements [Member] Long-Lived Asset, Class [Axis] Long-Lived Asset, Class [Axis] FAS/CAS operating adjustment FAS/ CAS operating adjustment FAS/ CAS operating adjustment Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Derivative Instruments and Hedging Activities Disclosures [Table] Derivative Instruments and Hedging Activities Disclosures [Table] Environmental Remediation Range of Future Costs [Line Items] Environmental Remediation Range of Future Costs [Line Items] [Line Items] for Environmental Remediation Range of Future Costs, the amount accrued within the range and the deferred costs expected to be recoverable through overhead charges on US Government contracts [Table] Cash and cash equivalents, beginning of year Cash and cash equivalents, end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Increase (Decrease) in Accounts Payable Increase (Decrease) in Accounts Payable Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Cash Performance Units Cash Performance Units [Member] Cash performance units. Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Debt Instrument [Axis] Debt Instrument [Axis] Measurement Frequency [Domain] Measurement Frequency [Domain] Stock-based compensation Share-Based Payment Arrangement, Noncash Expense Income Tax Authority, Name [Domain] Income Tax Authority, Name [Domain] Sentinel EMD phase [Member] Sentinel EMD phase [Member] Sentinel EMD phase Customer [Domain] Customer [Domain] Schedule of Inventory, Current [Table Text Block] Schedule of Inventory, Current [Table Text Block] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Basic earnings per share Earnings Per Share, Basic Share Repurchase [Line Items] Equity, Class of Treasury Stock [Line Items] Common stock repurchases Payments for Repurchase of Common Stock Advance payments and billings in excess of costs incurred Contract with Customer, Liability, Current Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Accelerated Share Repurchases, Cash or Stock Settlement Accelerated Share Repurchases, Cash or Stock Settlement Long-term debt, net of current portion of $763 for 2026 and $534 for 2025 Long-Term Debt, Excluding Current Maturities Award Type [Axis] Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Share Repurchases Class of Treasury Stock [Table Text Block] Retained earnings Retained Earnings (Accumulated Deficit) Product and Service [Axis] Product and Service [Axis] Equity Securities, FV-NI Equity Securities, FV-NI Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Liability for Uncertainty in Income Taxes, Current Liability for Uncertainty in Income Taxes, Current Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Pension Benefits Pension Plan [Member] Common stock Common Stock [Member] Income Tax Authority, Name [Axis] Income Tax Authority, Name [Axis] Effect of Change in Accounting Estimate, Type [Axis] Effect of Change in Accounting Estimate, Type [Axis] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Summary of Significant Accounting Policies Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Derivative Contract [Domain] Derivative Contract [Domain] Equity Awards Adjustments Equity Awards Adjustments [Member] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Total liabilities and shareholders’ equity Liabilities and Equity Employee Stock Option Share-Based Payment Arrangement, Option [Member] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Income Tax Authority [Domain] Income Tax Jurisdiction [Domain] Accelerated Share Repurchases, Date [Domain] Accelerated Share Repurchases, Date [Domain] Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Environmental Remediation [Table Text Block] Environmental Remediation [Table Text Block] Environmental Remediation Range of Possible Future Costs, Accrued Costs within that range and Deferred Cost expected to be recovered [Table Text Block] Tabular List, Table Tabular List [Table Text Block] Other Defined Benefit Plan, Other Cost (Credit) B-21 loss provision Loss Contingency Accrual, Loss (Reversal of Loss) Disposal Group, Not Discontinued Operation, Disposal Disclosures [Abstract] Other, net Other Nonoperating Income (Expense) Long-Term Debt Long-Term Debt [Text Block] IRS Notice 2026-7 [Member] IRS Notice 2026-7 [Member] IRS Notice 2026-7 Minimum Loss Contingency Minimum Loss Contingency [Member] Minimum Loss Contingency Name Awards Close in Time to MNPI Disclosures, Individual Name Mission Systems [Member] Mission Systems [Member] Mission Systems reporting segment. Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] General and administrative expenses General and Administrative Expense Long-Lived Asset, Class [Domain] Long-Lived Asset, Class [Domain] Cost Reimbursable Cost Reimbursable [Member] Cost Reimbursable contract type Employer contributions to retirement plans Schedule of Defined Benefit Plans Disclosures [Table Text Block] Preferred Stock, Shares Authorized Preferred Stock, Shares Authorized Property, Plant, and Equipment [Table] Property, Plant, and Equipment [Table] Preferred stock, $1 par value; 10,000,000 shares authorized; no shares issued and outstanding Preferred Stock, Value, Issued Adjustment to Compensation: Adjustment to Compensation [Axis] US Government US Government [Member] US Government [Member] Marketable Security, Unrealized Gain (Loss) Marketable Security, Unrealized Gain (Loss) Hedging Designation [Domain] Hedging Designation [Domain] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Components of net periodic benefit cost Schedule of Costs of Retirement Plans [Table Text Block] Commercial Paper, Maximum Borrowing Capacity Commercial Paper, Maximum Borrowing Capacity Commercial Paper, Maximum Borrowing Capacity Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Accelerated Share Repurchases, Adjustment to Recorded Amount Accelerated Share Repurchases, Adjustment to Recorded Amount Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Extinguishment of Debt, Amount Extinguishment of Debt, Amount Pension and OPB contributions Payment for Pension and Other Postretirement Benefits Hedging Designation [Axis] Hedging Designation [Axis] Foreign Exchange Forward [Member] Foreign Exchange Forward [Member] Gain on Sale of Investments Gain on Sale of Investments Effect of New Tax Legislation [Line Items] Effect of New Tax Legislation [Line Items] Effect of New Tax Legislation [Line Items] Inventory [Line Items] Inventory [Line Items] Credit Facility [Axis] Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Income Tax Authority [Axis] Income Tax Jurisdiction [Axis] Name Measure Name INCOME TAXES Income Tax Disclosure [Text Block] Trade accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Other operating activities, net Other Noncash Income (Expense) Corporate Alternative Minimum Tax Corporate Alternative Minimum Tax [Member] Corporate Alternative Minimum Tax Debt Instrument [Line Items] Debt Instrument [Line Items] Investment in Public Company [Domain] Investment in Public Company [Domain] Investment in Public Company [Domain] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Retirement Plan Type [Domain] Retirement Plan Type [Domain] Paid-in capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Environmental Remediation Expense, Recovery Environmental Remediation Expense, Recovery Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and Cash Equivalent Inventory, Raw Materials, Net of Reserves Inventory, Raw Materials, Net of Reserves Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect, Continuing Operation Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect, Continuing Operation Company Selected Measure Amount Company Selected Measure Amount Sales, operating costs and expenses, and operating income by segment Segment Reporting, Reconciliation of Profit (Loss) by Segment to Consolidated [Table Text Block] Income Taxes Receivable Income Taxes Receivable Depreciation and amortization Depreciation, Depletion and Amortization Effect of New Tax Legislation [Table] Effect of New Tax Legislation [Table] Effect of New Tax Legislation [Table] Non-PEO NEO Non-PEO NEO [Member] Entity Address, Line 1 Entity Address, Address Line One Restricted Stock Rights and Restricted Performance Stock Rights Grant Date Aggregate Fair Value Restricted Stock Rights and Restricted Performance Stock Rights Grant Date Aggregate Fair Value Restricted Stock Rights and Restricted Performance Stock Rights Grant Date Aggregate Fair Value Federal and foreign income tax expense Income Tax Expense (Benefit) Federal and foreign income tax expense Income Tax Expense (Benefit) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers, Net Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers, Net Adjustments to reconcile to net cash used in operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item [Abstract] Cost of Sales Cost of Product and Service Sold Award Timing Method Award Timing Method [Text Block] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Principles of Consolidation Consolidation, Policy [Policy Text Block] Increase (Decrease) in Earnings before Income Taxes Increase (Decrease) in Earnings before Income Taxes Increase (Decrease) in Income before Income Taxes Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Disclosure Text Block Supplement [Abstract] Disclosure Text Block Supplement [Abstract] Net earnings Net earnings (from above) Net earnings Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Statement [Table] Statement [Table] Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member] Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member] Restatement Determination Date: Restatement Determination Date [Axis] Accumulated Other Comprehensive Loss Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Accelerated Share Repurchases [Line Items] Accelerated Share Repurchases [Line Items] Share Repurchases - Notes to Table Share Repurchases Table Abstract Share Repuchase Table Footnotes, detail tags Change in Contract with Customer, Liability [Abstract] Change in Contract with Customer, Liability [Abstract] Debt Instruments [Abstract] Debt Instruments [Abstract] Shares Retired Treasury Stock, Shares, Retired Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]