Business Combinations [Abstract]
Acquisitions
Business Combination Disclosure [Text Block]
Restructuring and Related Activities [Abstract]
Schedule of Restructuring and Related Costs [Table]
Schedule of Restructuring and Related Costs [Table]
Restructuring Type [Axis]
Restructuring Type [Axis]
Type of Restructuring [Domain]
Type of Restructuring [Domain]
Severance costs
Employee Severance [Member]
Lease termination expenses
Contract Termination [Member]
Restructuring Plan [Axis]
Restructuring Plan [Axis]
Restructuring Plan [Domain]
Restructuring Plan [Domain]
Separation of New SAIC and Real Estate Optimization Initiatives
Separation of New SAIC and Real Estate Optimization Initiatives [Member]
Separation of New SAIC and Real Estate Optimization Initiatives [Member]
IS&GS Acquisition
IS&GS Acquisition [Member]
Restructuring Due To IS&GS Acquisition [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Cost and Reserve [Line Items]
Lease termination expenses
Restructuring Charges, Including Separation Costs
Restructuring Charges, Including Separation Costs
Restructuring Reserve [Roll Forward]
Restructuring Reserve [Roll Forward]
Opening balance
Restructuring Reserve
Charges
Restructuring Charges
Cash payments
Payments for Restructuring
Closing balance
Restructuring liability, period to settle
Restructuring Liability, Period to Settle
Restructuring Liability, Period to Settle
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Financial Data (Unaudited)
Quarterly Financial Information [Text Block]
Schedule of Business Acquisitions, by Acquisition [Table]
Schedule of Business Acquisitions, by Acquisition [Table]
Legal Entity [Axis]
Legal Entity [Axis]
Entity [Domain]
Entity [Domain]
Leidos Holdings, Inc
Leidos Holdings, Inc [Member]
Leidos Holdings, Inc [Member]
Business Acquisition [Axis]
Business Acquisition [Axis]
Business Acquisition, Acquiree [Domain]
Business Acquisition, Acquiree [Domain]
Information Systems & Global Solutions Business of Lockheed Martin
Information Systems & Global Solutions Business of Lockheed Martin [Member]
Information Systems & Global Solutions Business of Lockheed Martin [Member]
Business Acquisition [Line Items]
Business Acquisition [Line Items]
Revenues
Business Acquisition, Pro Forma Revenue
Income from continuing operations
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations, Net of Tax
Basic (in usd per share)
Business Acquisition, Pro Forma Earnings Per Share, Basic
Diluted (in usd per share)
Business Acquisition, Pro Forma Earnings Per Share, Diluted
Segment Reporting [Abstract]
Schedule of Segment Reporting Information by Segment
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Schedule of Total Revenue Percentages Contributable to Specific Government Agencies
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]
Receivables [Abstract]
Schedule of Accounts, Notes, Loans and Financing Receivable [Table]
Schedule of Accounts, Notes, Loans and Financing Receivable [Table]
Customer [Axis]
Customer [Axis]
Customer [Domain]
Customer [Domain]
One Customer
One Customer [Member]
One Customer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Billed and billable receivables
Billed Contracts Receivable
Unbilled receivables
Unbilled Contracts Receivable
Allowance for doubtful accounts
Allowance for Doubtful Accounts Receivable, Current
Accounts receivable, net
Accounts Receivable, Net, Current
Number of projects
Number of Projects
Number of Projects
Bad debt expense
Provision for Doubtful Accounts
Proceeds from sale of receivables
Proceeds from Sale and Collection of Receivables
Schedule of Selected Quarterly Financial Data
Quarterly Financial Information [Table Text Block]
Subsequent Events [Abstract]
Subsequent Event [Table]
Subsequent Event [Table]
Debt Instrument [Axis]
Debt Instrument [Axis]
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
Term Loan B Due August 2023
Term Loan B Due August Twenty Twenty Three [Member]
Term Loan B Dollar One Thousand and One Hundred and Thirty One Million Due August Twenty Twenty Three [Member]
Subsequent Event Type [Axis]
Subsequent Event Type [Axis]
Subsequent Event Type [Domain]
Subsequent Event Type [Domain]
Subsequent Event
Subsequent Event [Member]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Domain]
Long-term Debt, Type [Domain]
Secured Debt
Secured Debt [Member]
Subsequent Event [Line Items]
Subsequent Event [Line Items]
Debt instrument, face amount
Debt Instrument, Face Amount
Debt Instrument, Decrease in Basis Points
Debt Instrument, Decrease in Basis Points
Debt Instrument, Decrease in Basis Points
Stated interest rate (in percentage)
Debt Instrument, Interest Rate, Stated Percentage
Business Segments
Segment Reporting Disclosure [Text Block]
Disposal Groups, Including Discontinued Operations [Table]
Disposal Group Name [Axis]
Disposal Group Name [Axis]
Disposal Groups, Including Discontinued Operations, Name [Domain]
Disposal Group Name [Domain]
SAIC
SAIC [Member]
SAIC [Member]
Other Disposals
Other Disposals [Member]
Other Disposals [Member]
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]
Discontinued Operation
Discontinued Operations and Disposal Groups [Abstract]
Revenues
Disposal Group, Including Discontinued Operation, Revenue
Cost of revenues
Disposal Group, Including Discontinued Operation, Costs of Goods Sold
Selling, general and administrative expenses
Disposal Group, Including Discontinued Operation, Selling, General and Administrative Expense
Disposal Group, Including Discontinued Operation, Selling, General and Administrative Expense
Intangible asset impairment
Impairment of Intangible Assets, Finite-lived
Operating income
Disposal Group, Including Discontinued Operation, Operating Income (Loss)
Nonoperating Income (Expense)
Nonoperating Income (Expense)
(Loss) income from discontinued operations before income taxes
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Loss
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Income Tax Disclosure [Abstract]
Current, Federal and foreign
Current Federal and Foreign Tax Expense (Benefit)
Current Federal and Foreign Tax Expense (Benefit)
Current, State
Current State and Local Tax Expense (Benefit)
Deferred, Federal and foreign
Deferred Federal and Foreign Income Tax Expense (Benefit)
Deferred Federal and Foreign Income Tax Expense (Benefit)
Deferred, State
Deferred State and Local Income Tax Expense (Benefit)
Total
Income Tax Expense (Benefit)
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Scenario [Axis]
Scenario [Axis]
Scenario, Unspecified [Domain]
Scenario, Unspecified [Domain]
Scenario, Adjustment
Scenario, Adjustment [Member]
Plan Name [Axis]
Plan Name [Axis]
Plan Name [Domain]
Plan Name [Domain]
2006 Equity Incentive Plan
Two Thousand Six Equity Incentive Plan [Member]
Two Thousand Six Equity Incentive Plan [Member]
Award Type [Axis]
Award Type [Axis]
Award Type [Domain]
Equity Award [Domain]
Performance Shares
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected number of shares of stock to be issued under performance-based stock awards
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Shares, beginning balance (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number
Awards canceled/forfeited (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period
Awards granted (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
Awards vested (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period
Shares, ending balance (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted average grant-date fair value, Shares, beginning balance (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Weighted average grant-date fair value, Awards granted (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value
Weighted average grant-date fair value, Awards forfeited/canceled (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value
Weighted average grant-date fair value, Awards vested (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value
Weighted average grant-date fair value, Shares, ending balance (in dollars per share)
Performance period (in years)
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period
Maximum Percentage That Will Ultimately Vest For Shares Provided Under Long Term Performance Based Incentive Equity Awards Based On Target Amount Stated In Agreement
Maximum Percentage That Will Ultimately Vest For Shares Provided Under Long Term Performance Based Incentive Equity Awards Based On Target Amount Stated In Agreement
Maximum Percentage That Will Ultimately Vest for Shares Provided Under Long Term Performance Based Incentive Equity Awards Based on Target Amount Stated in Agreement
Stock issued to Leidos shareholder upon divestiture of SAIC, ratio
Stock Conversion Upon Divestiture
Stock Conversion Upon Divestiture
Weighted average grant date fair value of the awards granted, excluding dividend equivalents (usd per share)
Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Excluding Dividends Equivalents, Weighted Average Grant Date Fair Value
Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Excluding Dividends Equivalents, Weighted Average Grant Date Fair Value
Weighted average grant-date fair value (usd per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value
Expected volatility (in percentage)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate
Risk-free interest rate (in percentage)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate
Weighted average grant-date fair value, Awards granted (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Stock Price
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Stock Price
Unrecognized compensation cost, net of estimated forfeitures
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized
Expected weighted-average period of recognition, years
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition
Fair value of vesting awards that vested
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value
Statement of Stockholders' Equity [Abstract]
Statement [Table]
Statement [Table]
Equity Components [Axis]
Equity Components [Axis]
Equity Component [Domain]
Equity Component [Domain]
Leidos Holdings, Inc. stockholders' equity
Parent [Member]
Shares of common stock
Common Stock [Member]
Additional paid-in capital
Additional Paid-in Capital [Member]
Accumulated earnings (deficit)
Retained Earnings [Member]
Accumulated other comprehensive loss
AOCI Attributable to Parent [Member]
Non-controlling interest
Noncontrolling Interest [Member]
Statement [Line Items]
Statement [Line Items]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, shares
Shares, Issued
Balance, value
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest
Net income
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Other comprehensive income (loss), net of tax
Other Comprehensive Income (Loss), Net of Tax
Issuances of stock (less forfeitures), shares
Stock Issued During Period, New Issues Net of Cancellations, Shares
Stock Issued During Period, New Issues Net of Cancellations, Shares
Issuances of stock (less forfeitures)
Stock Issued During Period, Value, New Issues Net of Cancellations
Stock Issued During Period, Value, New Issues Net of Cancellations
Repurchases of stock, shares
Stock Repurchased and Retired During Period, Shares
Repurchases of stock and other
Stock Repurchased and Retired During Period, Value
Dividends
Dividends, Common Stock
Special cash dividend of $13.64 per share
Special Dividend Declared
Special Dividend Declared
Adjustments for income tax benefits from stock-based compensation
Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net
Stock-based compensation
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition
Stock issued for the IS&GS Business acquisition, shares
Stock Issued During Period, Shares, Acquisitions
Stock issued for the IS&GS Business acquisition
Stock Issued During Period, Value, Acquisitions
Other
Adjustments to Additional Paid in Capital, Other
Equity interest acquired
Noncontrolling Interest, Increase from Business Combination
Balance, shares
Balance, value
Earnings Per Share [Abstract]
Basic weighted average number of shares outstanding
Weighted Average Number of Shares Outstanding, Basic
Dilutive common share equivalents—stock options and other stock awards
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements
Diluted weighted average number of shares outstanding
Weighted Average Number of Shares Outstanding, Diluted
Reverse stock split
Stockholders' Equity Note, Stock Split, Conversion Ratio
Accumulated Other Comprehensive Loss
Stockholders' Equity Note Disclosure [Text Block]
Debt Disclosure [Abstract]
Note Payable and Long-Term Debt
Long-term Debt, Unclassified [Abstract]
2017
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months
2018
Long-term Debt, Maturities, Repayments of Principal in Year Two
2019
Long-term Debt, Maturities, Repayments of Principal in Year Three
2020
Long-term Debt, Maturities, Repayments of Principal in Year Four
2021
Long-term Debt, Maturities, Repayments of Principal in Year Five
2022 and thereafter
Long-term Debt, Maturities, Repayments of Principal after Year Five
Total principal payments
Long Term Debt Before Unamortized Discount
Long Term Debt Before Unamortized Discount
Less: unamortized debt discount and issuance costs
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net
Total notes payable and long-term debt
Long-term Debt and Capital Lease Obligations, Including Current Maturities
Accounting Policies [Abstract]
Project Assets Policy [Policy Text Block]
Project Assets Policy [Policy Text Block]
Project Assets Policy [Policy Text Block]
Fiscal Period, Policy [Policy Text Block]
Fiscal Period, Policy [Policy Text Block]
Goodwill
Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]
Use of Estimates
Use of Estimates, Policy [Policy Text Block]
Restructuring
Costs Associated with Exit or Disposal Activities or Restructurings, Policy [Policy Text Block]
Operating Cycle
Operating Cycle Policy [Text Block]
Operating Cycle
Business Combinations
Business Combinations Policy [Policy Text Block]
Investments
Equity Method Investments, Policy [Policy Text Block]
Variable Interest Entities
Consolidation, Variable Interest Entity, Policy [Policy Text Block]
Revenue Recognition
Revenue Recognition, Policy [Policy Text Block]
Changes In Estimates On Contracts
Changes In Estimates On Contracts [Policy Text Block]
Changes In Estimates On Contracts [Policy Text Block]
Dispositions
Discontinued Operations, Policy [Policy Text Block]
Pre-contract Costs
Precontract Costs, Policy [Policy Text Block]
Transition Costs Policy [Policy Text Block]
Transition Costs Policy [Policy Text Block]
Transition Costs Policy [Policy Text Block]
Fair Value Measurement, Policy [Policy Text Block]
Fair Value Measurement, Policy [Policy Text Block]
Fair Value Measurement
Fair Value of Financial Instruments, Policy [Policy Text Block]
Cash and Cash Equivalents
Cash and Cash Equivalents, Policy [Policy Text Block]
Restricted Cash
Restricted Cash Policy [Text Block]
Restricted Cash
Concentration of Credit Risk
Concentration Risk, Credit Risk, Policy [Policy Text Block]
Receivables
Receivables, Policy [Policy Text Block]
Inventories
Inventory, Policy [Policy Text Block]
Property, Plant and Equipment
Property, Plant and Equipment, Policy [Policy Text Block]
Intangible Assets
Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block]
Selling, General and Administrative Expenses
Selling, General and Administrative Expenses, Policy [Policy Text Block]
Income Taxes
Income Tax, Policy [Policy Text Block]
Stock-Based Compensation
Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]
Foreign Currency
Foreign Currency Transactions and Translations Policy [Policy Text Block]
Accounting Standards Updates Adopted
New Accounting Pronouncements, Policy [Policy Text Block]
Description of New Accounting Pronouncements Not Yet Adopted
Accounting Standards Updates Issued But Not Yet Adopted Policy [Text Block]
Accounting Standards Updates Issued But Not Yet Adopted
Stock-Based Compensation
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]
Subsequent Events
Subsequent Events [Text Block]
Commitments and Contingencies Disclosure [Abstract]
Legal Proceedings [Table]
Legal Proceedings [Table]
Legal Proceedings [Table]
Lockheed Martin
Lockheed Martin [Member]
Lockheed Martin [Member]
Leidos
Leidos [Member]
Leidos [Member]
Litigation Case [Axis]
Litigation Case [Axis]
Litigation Case [Domain]
Litigation Case [Domain]
MSA Venture
MSA Venture [Member]
MSA Venture [Member]
Data Privacy Litigation
Data Privacy Litigation [Member]
Data Privacy Litigation [Member]
Contracts by Third Party [Axis]
Contracts By Third Party [Axis]
Contracts by Third Party [Axis]
Contracts by Third Party [Domain]
Contracts By Third Party [Domain]
Contracts by Third Party [Domain]
Greek Government Contract
Greek Government Contract [Member]
Greek Government Contract [Member]
Legal Proceedings And Related Matters [Axis]
Legal Proceedings And Related Matters [Axis]
Legal Proceedings And Related Matters [Axis]
Legal Proceedings And Related Matters [Domain]
Legal Proceedings And Related Matters [Domain]
Legal Proceedings And Related Matters [Domain]
Securities Class Actions
Securities Class Actions [Member]
Securities Class Actions [Member]
Guarantor Obligations, Nature [Axis]
Guarantor Obligations, Nature [Axis]
Guarantor Obligations, Nature [Domain]
Guarantor Obligations, Nature [Domain]
Letters of Credit Related System Support and Maintenance
Letters Of Credit Related System Support And Maintenance [Member]
Letters of Credit Related System Support and Maintenance [Member]
Loss Contingency Nature [Axis]
Loss Contingency Nature [Axis]
Loss Contingency, Nature [Domain]
Loss Contingency, Nature [Domain]
Letters of Credit Relating to Delivery
Letters Of Credit Relating To Delivery [Member]
Letters of Credit Relating to Delivery [Member]
Standby Letters of Credit
Standby Letters of Credit [Member]
Invoice For Undisputed Portion Of Contract
Invoice For Undisputed Portion Of Contract [Member]
Invoice for Undisputed Portion of Contract [Member]
Value Added Taxes
Value Added Taxes [Member]
Value Added Taxes [Member]
Legal Proceedings [Line Items]
Legal Proceedings [Line Items]
Legal Proceedings [Line Items]
Estimate of loss
Loss Contingency, Estimate of Possible Loss
Percentage of damages covered, between $38 million and $64 million settlement amount
Loss Contingency, Percentage of Damages Covered, Between Thirty Eight Million and Sixty Four Million Settlement Amount
Loss Contingency, Percentage of Damages Covered, Between Thirty Eight Million and Sixty Four Million Settlement Amount
Percentage of damages covered, in excess of $64 million settlement amount
Loss Contingency, Percentage of Damages Covered, Excess of Sixty Four Million Settlement Amount
Loss Contingency, Percentage of Damages Covered, Excess of Sixty Four Million Settlement Amount
Loss contingency accrual
Loss Contingency Accrual
Indemnification assets, amount as of acquisition date
Business Combination, Indemnification Assets, Amount as of Acquisition Date
Number of plaintiffs
Loss Contingency, Number of Plaintiffs
Number of lawsuits
Number Of Lawsuits
Number Of Lawsuits
Number of lawsuits, withdrawn
Loss Contingency Claims Resolved
Loss Contingency Claims Resolved
Number of lawsuits, consolidated
Consolidated Cases Number Of Lawsuits
Consolidated Cases Number Of Lawsuits
Number of former CEO's
Number of Former Chief Executive Officers
Number of Former Chief Executive Officers
Contracts receivable
Contract Receivable
Arbitral award
Gain Contingency, Unrecorded Amount
Recorded losses
Cumulative Contract Losses
Cumulative losses on a customer contract.
Accounts and Notes Receivable, Net
Accounts and Notes Receivable, Net
Receivables relating to value added taxes
Value Added Tax Receivable
Amount outstanding
Long-term Line of Credit
Letter of credit available to the company
Third Party Credit Enhancement Amount
Third Party Credit Enhancement, Amount
Disclosure Leases Additional Information [Abstract]
Disclosure Leases Additional Information [Abstract]
Capital lease obligations
Capital Lease Obligations
Remaining term of capital lease
Remaining Term of Capital Lease
Remaining Term of Capital Lease
Leases [Abstract]
Schedule of Rental Expense for Facilities and Equipment
Schedule of Rent Expense [Table Text Block]
Schedule of Future Minimum Lease Commitments and Sublease Receipts under Non-Cancelable Operating Leases
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment [Table]
Property, Plant and Equipment [Table]
Property, Plant and Equipment, Type [Axis]
Property, Plant and Equipment, Type [Axis]
Property, Plant and Equipment, Type [Domain]
Property, Plant and Equipment, Type [Domain]
Computers and other equipment
Computer and Other Equipment [Member]
Computer and Other Equipment [Member]
Leasehold improvements
Leasehold Improvements [Member]
Buildings and improvements
Building and Building Improvements [Member]
Office furniture and fixtures
Furniture and Fixtures [Member]
Land
Land [Member]
Construction in progress
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross
Property, Plant and Equipment, Gross
Less accumulated depreciation and amortization
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
Property, plant and equipment, net
Property, Plant and Equipment, Net
Depreciation
Depreciation
Asset impairment charges
Tangible Asset Impairment Charges
Write off of property disposed
Property, Plant and Equipment, Disposals
Disclosure Schedule Of Certain Financial Statement Captions [Abstract]
Disclosure - Schedule of Certain Financial Statement Captions [Abstract]
Inventory, prepaid expenses and other current assets:
Inventory Prepaid Expenses And Other Current Assets [Abstract]
Inventory, prepaid expenses and other current assets
Inventory
Inventory, Net
Prepaid expenses
Prepaid Expense, Current
Prepaid income taxes and tax refunds receivable
Prepaid Taxes
Transition costs and project assets
Transition Costs and Project Assets
Transition Costs and Project Assets
Pre-contract costs
Prepaid Contract Costs
Prepaid Contract Costs
Restricted cash
Restricted Cash and Cash Equivalents, Current
Short-term notes receivable
Notes, Loans and Financing Receivable, Net, Current
Other
Other Assets, Miscellaneous, Current
Total inventory, prepaid expenses and other current assets
Other Assets, Current
Other assets:
Other Assets [Abstract]
Long-term notes receivables
Notes, Loans and Financing Receivable, Net, Noncurrent
Investment in rabbi trust
Investments
Deferred costs
Deferred Costs
Derivatives
Derivative Asset
Equity method investments
Equity Method Investments
Other
Other Assets, Miscellaneous
Other Assets
Other Assets
Dividends received from equity method investments
Proceeds from Equity Method Investment, Dividends or Distributions
Accounts payable and accrued liabilities:
Accounts Payable and Accrued Liabilities, Current [Abstract]
Accrued liabilities
Accrued Liabilities, Current
Accounts payable
Accounts Payable, Current
Collections in excess of revenues and deferred revenue
Collections In Excess Of Revenues And Deferred Revenue
Collections In Excess Of Revenues And Deferred Revenue.
Provision for loss contracts
Provision for Loss on Contracts
Total accounts payable and accrued liabilities
Accounts Payable and Accrued Liabilities, Current
Accrued payroll and employee benefits:
Employee-related Liabilities, Current [Abstract]
Salaries, bonuses and amounts withheld from employees’ compensation
Salaries Bonuses And Amounts Withheld From Employees Compensation
Salaries, bonuses and amounts withheld from employees' compensation.
Accrued vacation
Accrued Vacation, Current
Accrued contributions to employee benefit plans
Accrued Employee Benefits, Current
Total Accrued payroll and employee benefits
Employee-related Liabilities, Current
Other long-term liabilities:
Other Noncurrent Liabilities [Abstract]
Other Noncurrent Liabilities [Abstract]
Deferred compensation
Deferred Compensation Liability, Classified, Noncurrent
Lease related obligations
Operating Lease Obligation, Noncurrent
Operating Lease Obligation, Noncurrent
Tax indemnity liability
Tax Indemnity Liability
Tax Indemnity Liability
Deferred revenue
Deferred Revenue
Accrued pension liabilities
Defined Benefit Pension Plan, Liabilities, Noncurrent
Liabilities for uncertain tax positions
Liability for Uncertainty in Income Taxes, Noncurrent
Other
Other Liabilities Noncurrent Other
Other Liabilities Noncurrent Other.
Total other long-term liabilities
Other Liabilities, Noncurrent
Other (expense) income, net
Nonoperating Income (Expense) [Abstract]
Loss on foreign currency
Foreign Currency Transaction Gain (Loss), Realized
Gain on sale of former headquarters
Gain (Loss) on Disposition of Property Plant Equipment
Other income, net
Other Income (Expense), Net
Other Income (Expense), Net
Other (expense) income, net
Other Nonoperating Income (Expense)
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill [Table]
Schedule of Goodwill [Table]
Segments [Axis]
Segments [Axis]
Segment [Domain]
Segments [Domain]
Health and Infrastructure
Health and Infrastructure [Member]
Health and Infrastructure [Member]
Subsegments [Axis]
Subsegments [Axis]
Subsegments [Domain]
Subsegments [Domain]
Health Solutions
Health Solutions [Member]
Health Solutions [Member]
Infrastructure [Member]
Infrastructure [Member]
Infrastructure [Member]
Valuation Technique [Axis]
Valuation Technique [Axis]
Valuation Technique [Domain]
Valuation Technique [Domain]
Income Approach Valuation Technique
Income Approach Valuation Technique [Member]
Market Approach Valuation Technique
Market Approach Valuation Technique [Member]
Goodwill [Line Items]
Goodwill [Line Items]
Accumulated impairment loss
Goodwill, Impaired, Accumulated Impairment Loss
Fair Value Inputs, EBITDA multiple
Fair Value Inputs, Earnings before Interest, Taxes, Depreciation, and Amortization Multiple
Fair Value Inputs, revenue multiple
Fair Value Inputs, Revenue Multiple
Fair Value Inputs, control premium
Fair Value Inputs, Control Premium
Fair Value Inputs, LT revenue growth rate
Fair Value Inputs, Long-term Revenue Growth Rate
Fair Value Inputs, Cap rate
Fair Value Inputs, Cap Rate
Fair Value Input, Specific company risk premium
Fair Value Input, Specific Company Risk Premium
Fair Value Input, Specific Company Risk Premium
Fair Value as percentage of carrying value
Goodwill Impairment, Fair Value as Percentage of Carrying Value
Goodwill Impairment, Fair Value as Percentage of Carrying Value
Goodwill impairment charges
Goodwill, Impairment Loss
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]
Antidilutive Securities [Axis]
Antidilutive Securities [Axis]
Antidilutive Securities, Name [Domain]
Antidilutive Securities, Name [Domain]
Stock Options
Employee Stock Option [Member]
Outstanding Stock Awards
Stock Compensation Plan [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive stock based awards
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Balance Sheet Location [Axis]
Balance Sheet Location [Axis]
Balance Sheet Location [Domain]
Balance Sheet Location [Domain]
Decrease in strike price by factor
Share-based Compensation, Decrease in Strike Price by Factor
Share-based Compensation, Decrease in Strike Price by Factor
Increase in number of shares issuable upon exercise of each option (in shares)
Share-based Compensation, Increase in Number of Shares Issuable Upon Exercise of Each Option
Share-based Compensation, Increase in Number of Shares Issuable Upon Exercise of Each Option
Options, outstanding, period increase (decrease)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Period Increase (Decrease)
Special dividend declared
Special Dividend Paid
Special Dividend Paid
Stock issued
Stock Issued
Schedule of Notes Payable and Long-Term Debt
Schedule of Long-term Debt Instruments [Table Text Block]
Schedule of Maturities of Notes Payable and Long-Term Debt
Schedule of Maturities of Long-term Debt [Table Text Block]
Supplemental Cash Flow Information [Abstract]
Schedule of Supplementary Cash Flow Information
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]
Sale Leaseback Transaction [Table]
Sale Leaseback Transaction [Table]
Notes Payable
Notes Payable, Other Payables [Member]
Counterparty Name [Axis]
Counterparty Name [Axis]
Counterparty Name [Domain]
Counterparty Name [Domain]
Purchaser of the Property
Purchaser of the Property [Member]
Purchaser of the Property [Member]
Debt Instrument, Redemption, Period [Axis]
Debt Instrument, Redemption, Period [Axis]
Debt Instrument, Redemption, Period [Domain]
Debt Instrument, Redemption, Period [Domain]
Prepaid Before December 17, 2018
Prepaid Before December Seventeen Twenty Eighteen [Member]
Prepaid Before December Seventeen Twenty Eighteen [Member]
Prepaid Prior to Maturity
Prepaid Prior to Maturity [Member]
Prepaid Prior to Maturity [Member]
Derivative Instrument [Axis]
Derivative Instrument [Axis]
Derivative Contract [Domain]
Derivative Contract [Domain]
Floor
Interest Rate Floor [Member]
Variable Rate [Axis]
Variable Rate [Axis]
Variable Rate [Domain]
Variable Rate [Domain]
30 day LIBOR
Thirty day LIBOR [Member]
Thirty day LIBOR [Member]
Sale Leaseback Transaction, Description [Axis]
Sale Leaseback Transaction, Description [Axis]
Sale Leaseback Transaction, Name [Domain]
Sale Leaseback Transaction, Name [Domain]
May 2013 Sales Lease Back Agreement
May 2013 Sales Lease Back Agreement [Member]
May 2013 Sales Lease Back Agreement [Member]
Amendment to the Original Purchase and Sale Agreement
Amendment to the Original Purchase and Sale Agreement [Member]
Amendment to the Original Purchase and Sale Agreement [Member]
Sale Leaseback Transaction [Line Items]
Sale Leaseback Transaction [Line Items]
Area of land
Area of Land
Number of real estate properties
Number of Real Estate Properties
Proceeds from real estate financing transaction
Sale Leaseback Transaction, Gross Proceeds, Financing Activities
Proceeds from sale
Sale Leaseback Transaction, Net Proceeds, Financing Activities
Allocated consideration to Note parable and Other long-term liabilities
Sale Leaseback Transaction, Amount Due under Financing Arrangement
Discount on proceeds
Sale Leaseback Transaction, Transaction Costs, Financing Activities
Gain (loss) on sale of properties
Gain (Loss) on Sale of Properties
Write off of financing note payable
Gain (Loss) on Extinguishment of Debt
Write off of other long term liabilities
Increase (Decrease) in Other Noncurrent Liabilities
Lease termination fees
Gain (Loss) on Contract Termination
Selling costs
Selling Expense
Variable interest rate (in percentage)
Debt Instrument, Basis Spread on Variable Rate
Term of debt instrument (in years)
Debt Instrument, Term
Percentage of accrued interest (in percentage)
Debt Instrument, Redemption, Percentage of Accrued Interest
Debt Instrument, Redemption, Percentage of Accrued Interest
Summary of Significant Accounting Policies
Significant Accounting Policies [Text Block]
Earnings (Loss) Per Share (EPS)
Earnings Per Share [Text Block]
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Programs and contract intangibles
Contract-Based Intangible Assets [Member]
Backlog
Order or Production Backlog [Member]
Weighted average lives of finite-lived intangibles (years)
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life
Intangible assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles
Acquisition costs
Strategic Acquisition and Integration Costs
Strategic Acquisition and Integration Costs
Integration costs
Other Integration Costs
Other Integration Costs
Acquisition and Integration Costs
Acquisition and Integration Costs
Acquisition and Integration Costs
Goodwill
Goodwill Disclosure [Text Block]
Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table]
Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table]
Indefinite-lived Intangible Assets by Major Class [Axis]
Indefinite-lived Intangible Assets [Axis]
Indefinite-lived Intangible Assets, Major Class Name [Domain]
Indefinite-lived Intangible Assets, Major Class Name [Domain]
Trade names
Trade Names [Member]
Customer relationships
Customer Relationships [Member]
Software and technology
Computer Software, Intangible Asset [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying value
Finite-Lived Intangible Assets, Gross
Accumulated amortization
Finite-Lived Intangible Assets, Accumulated Amortization
Net carrying value
Finite-Lived Intangible Assets, Net
Indefinite-lived intangible assets
Indefinite-Lived Intangible Assets (Excluding Goodwill)
Total intangible assets, Gross carrying value
Intangible Assets, Gross (Excluding Goodwill)
Total intangible assets, Net carrying value
Intangible Assets, Net (Excluding Goodwill)
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-term Debt Instruments [Table]
LIBOR
London Interbank Offered Rate (LIBOR) [Member]
Range [Axis]
Range [Axis]
Range [Domain]
Range [Domain]
Minimum
Minimum [Member]
Maximum
Maximum [Member]
Interest rate swaps
Interest Rate Swap [Member]
Hedging Designation [Axis]
Hedging Designation [Axis]
Hedging Designation [Domain]
Hedging Designation [Domain]
Designated as Hedging Instrument
Designated as Hedging Instrument [Member]
Hedging Relationship [Axis]
Hedging Relationship [Axis]
Hedging Relationship [Domain]
Hedging Relationship [Domain]
Fair value interest rate swaps
Fair Value Hedging [Member]
Senior Notes
Senior Notes [Member]
Unsecured Debt [Member]
Unsecured Debt [Member]
Income Statement Location [Axis]
Income Statement Location [Axis]
Income Statement Location [Domain]
Income Statement Location [Domain]
Other Income, Net
Other Income, Net [Member]
Other Income, Net [Member]
Extinguishment of Debt [Axis]
Extinguishment of Debt [Axis]
Extinguishment of Debt, Type [Domain]
Extinguishment of Debt, Type [Domain]
Notes Which Mature In December 2020
Notes Which Mature On December Two Thousand Twenty [Member]
Notes Which Mature on December Two Thousand Twenty [Member]
Notes Which Mature In December 2040
Notes Which Mature On December Two Thousand Forty [Member]
Notes Which Mature On December Two Thousand Forty [Member]
Notes Which Mature In July 2033
Notes Which Mature On July Two Thousand Thirty Three [Member]
Notes Which Mature On July Two Thousand Thirty Three [Member]
Term Loan A $690 Million due August 2021
Term Loan A Dollar Six Hundred and Ninety Million Due August Twenty Twenty One [Member]
Term Loan A Dollar Six Hundred and Ninety Million Due August Twenty Twenty One [Member]
Term Loan A
Term Loan A [Member]
Term Loan A [Member]
Term Loan B
Term Loan B [Member]
Term Loan B [Member]
Term Loan A Due August 2019
Term Loan A Due August Twenty Nineteen [Member]
Term Loan A Due August Twenty Nineteen [Member]
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Long-term debt, gross
Long-term Debt, Gross
Unamortized discount
Debt Instrument, Unamortized Discount
Debt issuance costs, net
Debt Issuance Costs, Net
Retired principle amount
Extinguishment of Debt, Amount
Note payable, face amount
Gain (loss) on extinguishment of debt
Gain (Loss) on Repurchase of Debt Instrument
Repayments of debt
Repayments of Long-term Debt
Long-term debt
Long-term Debt
Debt instrument, credit agreement, incremental available amount of funds, initial Value
Debt Instrument, Credit Agreement, Incremental Available Amount Of Funds, initial Value
Debt Instrument, Credit Agreement, Incremental Available Amount Of Funds, Initial Value
Debt instrument, annual fixed amount allowed per credit agreement
Debt Instrument, Annual Fixed Amount Allowed Per Credit Agreement
Debt Instrument, Annual Fixed Amount Allowed Per Credit Agreement
Debt instrument, required prepayment amount equal to percentage of excess cash flow calculated based on secured leverage ratio greater than 2.75 (in percentage)
Debt Instrument, Required Prepayment Amount Equal To Percentage of Excess Cash Flow Calculated Based on Secured Leverage Ratio Greater Than Two Point Seven Five, Percentage
Debt Instrument, Required Prepayment Amount Equal To Percentage of Excess Cash Flow Calculated Based on Secured Leverage Ratio, Percentage
Debt instrument, covenant, secured leverage ratio, for debt prepayment to be 50% of excess cash flow, minimum
Debt Instrument, Covenant, Secured Leverage Ratio, For Debt Prepayment to be Fifty Percent of Excess Cash Flow, Minimum
Debt Instrument, Covenant, Secured Leverage Ratio, For Debt Prepayment to be Fifty Percent of Excess Cash Flow
Debt instrument, required prepayment amount equal to percentage of excess cash flow calculated based on secured leverage ratio between 2.0 and 2.75, (in percentage)
Debt Instrument, Required Prepayment Amount Equal To Percentage of Excess Cash Flow Calculated Based on Secured Leverage Ratio Between Two Point Zero and Two Point Seven Five, Percentage
Debt Instrument, Required Prepayment Amount Equal To Percentage of Excess Cash Flow Calculated Based on Secured Leverage Ratio Between Two Point Zero and Two Point Seven Five, Percentage
Debt instrument, covenant, secured leverage ratio, for debt prepayment to be 25% of excess cash flow, minimum
Debt Instrument, Covenant, Secured Leverage Ratio, For Debt Prepayment to be Twenty Five Percent of Excess Cash Flow, Minimum
Debt Instrument, Covenant, Secured Leverage Ratio
Debt instrument, required prepayment amount equal to ratio less than 2.0
Debt Instrument, Required Prepayment Amount Secured Leverage Ratio Less Than Two Point Zero
Debt Instrument, Required Prepayment Amount Secured Leverage Ratio Less Than Two Point Zero
Repayments of debt
Repayments of Debt
Write off of deferred debt issuance cost
Write off of Deferred Debt Issuance Cost
Debt issuance costs, gross
Debt Issuance Costs, Gross
Amortization of financing costs
Amortization of Deferred Debt Issuance Cost And Debt Discount
Amortization of Deferred Debt Issuance Cost And Debt Discount
Basic:
Earnings Per Share, Basic [Abstract]
Income (loss) from continuing operations attributable to Leidos common stockholders (usd per share)
Income (Loss) from Continuing Operations, Per Basic Share
Discontinued operations, net of taxes (usd per share)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share
Net income (loss) attributable to Leidos common stockholders (usd per share)
Earnings Per Share, Basic
Diluted:
Earnings Per Share, Diluted [Abstract]
Income (loss) from continuing operations attributable to Leidos common stockholders (usd per share)
Income (Loss) from Continuing Operations, Per Diluted Share
Discontinued operations, net of taxes (usd per share)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share
Net income (loss) attributable to Leidos common stockholders (usd per share)
Earnings Per Share, Diluted
Net favorable impact to income (loss) from continuing operations before taxes
Increase (Decrease) In Income From Change In Contract Estimates
Increase (Decrease) In Income From Change In Contract Estimates
Impact on diluted EPS from continuing operations attributable to Leidos common stockholders
Increase (Decrease) In Income From Change In Contract Estimates Per Diluted Share
Increase (Decrease) In Income From Change In Contract Estimates Per Diluted Share
Other Commitments And Contingencies [Table]
Other Commitments And Contingencies [Table]
Other Commitments And Contingencies [Table]
Virnet X Inc
Virnet X Inc [Member]
Virnet X Inc [Member]
Performance Guarantee
Performance Guarantee [Member]
Other Commitments And Contingencies [Line Items]
Other Commitments And Contingencies [Line Items]
Other Commitments And Contingencies [Line Items]
Number of patents infringed
Number Of Patents Infringed
Number of Patents Infringed
Litigation settlement
Litigation Settlement, Amount
Proceeds from legal settlements
Proceeds from Legal Settlements
Patents found infringed upon, number
Gain Contingency, Patents Found Infringed upon, Number
Percentage of settlement
Litigation Settlement, Amount, Percentage of Total
Litigation Settlement, Amount, Percentage of Total
Comprehensive income attributable to non-controlling interest, net of taxes
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest
Amount outstanding
Letters of Credit Outstanding, Amount
Surety bonds
Surety Bonds Amount Outstanding
Surety Bonds, Amount Outstanding
Estimated accruals for claims incurred but not yet reported
Liability for Claims and Claims Adjustment Expense
Disposal Groups, Including Discontinued Operations [Table]
Contingent Consideration by Type [Axis]
Contingent Consideration by Type [Axis]
Contingent Consideration Type [Domain]
Contingent Consideration Type [Domain]
Milestone Two
Milestone Two [Member]
Milestone Two [Member]
Plainfield Renewal Energy Holdings LLC
Plainfield Renewal Energy Holdings LLC [Member]
Plainfield Renewal Energy Holdings LLC [Member]
Other Operating Income (Expense)
Other Operating Income (Expense) [Member]
Disposal Group Classification [Axis]
Disposal Group Classification [Axis]
Disposal Group Classification [Domain]
Disposal Group Classification [Domain]
Disposal Group, Disposed of by Sale, Not Discontinued Operations
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Discontinued Operations, Disposed of by Sale
Discontinued Operations, Disposed of by Sale [Member]
One Business
One Business [Member]
One Business [Member]
HES
Emergency Management Consulting [Member]
Emergency Management Consulting [Member]
Cloudshield Technologies
Cloudshield Technologies [Member]
Cloudshield Technologies [Member]
Leidos, Inc.
Subsidiaries [Member]
Proceeds from disposition of business
Proceeds from Divestiture of Businesses, Net of Cash Divested
Gain on sale of business
Gain (Loss) on Disposition of Business
Disposal group, account receivable
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net
Disposal group, non-current assets
Disposal Group, Including Discontinued Operation, Other Assets
Disposal group, account payable and accrued liabilities
Disposal Group, Including Discontinued Operation, Accounts Payable and Accrued Liabilities, Current
Accounts payable and accrued liabilities
Capacity of power plant
Capacity of Power Plant
Capacity of Power Plant
Percentage of ownership (in percentage)
Percentage of Ownership
Percentage of Ownership
Proceeds from U.S. Treasury cash grant
Proceeds from Government Grant
Proceeds from Government Grant
Deferred tax assets
Deferred Tax Assets, Gross
Discontinued operation, percentage of ownership sold (in percentage)
Discontinued Operation, Percentage of Ownership Sold
Discontinued Operation, Percentage of Ownership Sold
Discontinued operation, consideration
Disposal Group, Including Discontinued Operation, Consideration
Cash payment on closing
Proceeds from Divestiture of Interest in Consolidated Subsidiaries
Promissory note, net received for disposition of business
Noncash or Part Noncash Divestiture, Amount of Consideration Received
Contingent earn-out payments
Disposal Group, Including Discontinued Operation, Contingent Consideration, Maximum Earn-out Payment
Disposal Group, Including Discontinued Operation, Contingent Consideration, Maximum Earn-out Payment
Contingent consideration arrangements
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High
Note receivable, option to extend for one year period, number
Note Receivable, Option to Extend for One Year Period, Number
Note Receivable, Option to Extend for One Year Period, Number of Extensions
Note receivable, interest rate, stated percentage (in percentage)
Note Receivable, Interest Rate, Stated Percentage
Note Receivable, Interest Rate, Stated Percentage
Note receivable, interest rate, stated percentage, if maturity is extended beyond July 24, 2017 (in percentage),
Note Receivable, Interest Rate, Stated Percentage, If Maturity is Extended Beyond July Twenty Four Twenty Seventeen
Note Receivable, Interest Rate, Stated Percentage, If Maturity is Extended
Stated interest rate, if maturity is extended beyond July 24, 2019 (in percentage)
Note Receivable, Interest Rate, Stated Percentage, If Maturity is Extended Beyond July Twenty Four Twenty Nineteen
Note Receivable, Interest Rate, Stated Percentage, If Maturity is Extended Beyond July Twenty Four Twenty Nineteen
Proceeds from collections on promissory note
Proceeds from Collection of Notes Receivable
Proceeds from divestiture of businesses
Proceeds from Divestiture of Businesses
Impairment of assets
Impairment of Long-Lived Assets to be Disposed of
Asset impairment charges
Asset Impairment Charges
Cash
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents
Receivables, net
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables
Inventory, prepaid expenses and other current assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets
Property, plant and equipment
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment
Deferred tax assets
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets
Intangible assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill
Other assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets
Accounts payable and accrued liabilities
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable
Accrued payroll and employee benefits
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other
Long-term debt, current portion
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt
Deferred tax liabilities
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities
Long-term debt, net of current portion
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Liabilities
Other long-term liabilities
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other
Total identifiable net liabilities assumed
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net
Non-controlling interest
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value
Goodwill
Goodwill
Preliminary purchase price
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest
Quarterly Financial Information [Table]
Quarterly Financial Information [Table]
Quarterly Financial Information [Table]
Quarterly Financial Information [Line Items]
Quarterly Financial Information [Line Items]
Quarterly Financial Information [Line Items]
Acquisition and integration costs
Gain (Loss) on Sale of Properties
Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense
Intangible Assets
Intangible Assets Disclosure [Text Block]
Credit Facility [Axis]
Credit Facility [Axis]
Credit Facility [Domain]
Credit Facility [Domain]
Revolving Credit Facility
Revolving Credit Facility [Member]
Line of Credit
Line of Credit [Member]
Abacus Innovations Corporation (Splitco)
Abacus Innovations Corporation (Splitco) [Member]
Abacus Innovations Corporation (Splitco) [Member]
Number of shares Lockheed Martin shareholders will receive from Leidos, as a percentage of Leidos common stock (in percentage)
Business Combination, Merger Agreement, Equity Interest Issued or Issuable , Percentage of Common Stock Issued To The Acquiree Company
Business Combination, Merger Agreement, Equity Interest Issued or Issuable , Percentage of Common Stock Issued To The Acquiree Company
Percentage of common stock retained by the Leidos ( in percentage)
Business Combination, Merger Agreement, Percentage of Common Stock Retained by the Acquiring Company
Business Combination, Merger Agreement, Percentage of Common Stock Retained by the Acquiring Company
Debt financing
Proceeds from Issuance of Long-term Debt
Payments to parent, special payment
Payments to Parent, Special Payment
Payments to Parent, Special Payment
Leidos Innovations Corporation indebtedness assumed
Business Combination, Consideration Transferred, Liabilities Incurred
Unsecured borrowing capacity
Line of Credit Facility, Maximum Borrowing Capacity
Special cash dividend
Special Dividend, Per Share, Declared
Special Dividend, Per Share, Declared
Number of shares Lockheed Martin shareholders will receive from Leidos
Business Combination, Merger Agreement, Equity Interest Issued or Issuable , Number of Shares
Business Combination, Merger Agreement, Equity Interest Issued or Issuable , Number of Shares
Share price (usd per share)
Share Price
Acquisition related costs
Business Combination, Acquisition Related Costs
Change in PPE
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Property, Plant, and Equipment
Decrease in deferred tax liabilities
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deferred Tax Assets
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deferred Tax Assets
Change in receivable
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Receivables
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Receivables
Goodwill adjustment
Goodwill, Purchase Accounting Adjustments
Deferred tax liabilities adjustment
Business Combination, Provisional Information, Initial Accounting Incomplete, Deferred Tax Liabilities
Business Combination, Provisional Information, Initial Accounting Incomplete, Deferred Tax Liabilities
Adjustment, other Long-term Liabilities
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, other Long-term Liabilities
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, other Long-term Liabilities
Goodwill, expected tax deductible, amount
Business Acquisition, Goodwill, Expected Tax Deductible Amount
Intangible assets acquired
Schedule of Property, Plant and Equipment
Property, Plant and Equipment [Table Text Block]
Operating Activities [Axis]
Operating Activities [Axis]
Operating Activities [Domain]
Operating Activities [Domain]
Continuing Operations
Continuing Operations [Member]
Vesting Stock Awards
Vesting Stock Awards [Member]
Vesting Stock Awards [Member]
Total stock-based compensation expense
Allocated Share-based Compensation Expense
Tax benefits recognized from stock-based compensation
Schedule of Stock-Based Compensation and Related Tax Benefits Recognized
Schedule Of Share Based Compensation And Related Tax Benefits Recognized Table [Text Block]
Schedule Of Share Based Compensation And Related Tax Benefits Recognized
Schedule of Weighted Average Grant-Date Fair Value And Assumptions Used
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
Schedule of Options Outstanding
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]
Schedule of Vesting Stock Award Activity
Schedule of Unrecognized Compensation Cost, Nonvested Awards [Table Text Block]
Schedule of Performance-Based Stock Award Activity
Schedule of Share-based Compensation, Stock Options and Stock Appreciation Rights Award Activity [Table Text Block]
Class of Treasury Stock [Table]
Class of Treasury Stock [Table]
Share Repurchase Program [Axis]
Share Repurchase Program [Axis]
Share Repurchase Program [Domain]
Share Repurchase Program [Domain]
Third Accelerated Share Repurchase
Third Accelerated Share Repurchase [Member]
Third Accelerated Share Repurchase [Member]
Second Accelerated Share Repurchase
Second Accelerated Share Repurchase [Member]
Second Accelerated Share Repurchase [Member]
Second Accelerated Share Repurchase, Initial Delivery
Second Accelerated Share Repurchase, Initial Delivery [Member]
Second Accelerated Share Repurchase, Initial Delivery [Member]
Second Accelerated Share Repurchase, Final Delivery
Second Accelerated Share Repurchase, Final Delivery [Member]
Second Accelerated Share Repurchase, Final Delivery [Member]
Accelerated Share Repurchase (ASR)
Accelerated Share Repurchase [Member]
Accelerated Share Repurchase [Member]
Equity, Class of Treasury Stock [Line Items]
Equity, Class of Treasury Stock [Line Items]
Agreement to repurchase shares, amount
Stock Repurchase Program, Authorized Amount
Number of shares repurchased and retired
Amount paid to repurchase outstanding shares
Payments for Repurchase of Equity
Value of initial shares repurchased
Accumulated Other Comprehensive Income (Loss) [Table]
Accumulated Other Comprehensive Income (Loss) [Table]
Foreign currency translation adjustments
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Unrecognized net (loss) income on derivative instruments
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Pension liability adjustments
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Other comprehensive (loss) income
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax
Reclassification from accumulated other comprehensive loss
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax
Accrued vacation and bonuses
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Compensated Absences
Investments
Deferred Tax Assets, Investment in Subsidiaries
Deferred compensation
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation
Vesting stock awards
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost
Credits and net operating losses carryovers
Deferred Tax Assets, Tax Credit and Net Operating Loss Carryforwards
Deferred Tax Assets, Tax Credit and Net Operating Loss Carryforwards
Employee benefit contributions
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Benefits
Capital loss carryover
Deferred Tax Assets, Capital Loss Carryforwards
Reserves
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Loss Reserves
Deferred rent and tenant allowances
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Deferred Rent
Other
Deferred Tax Assets, Other
Total deferred tax assets
Valuation allowance
Deferred Tax Assets, Valuation Allowance
Deferred tax assets, net of valuation allowance
Deferred Tax Assets, Net of Valuation Allowance
Deferred revenue
Deferred Tax Liabilities, Tax Deferred Income
Fixed asset basis differences
Deferred Tax Liabilities, Property, Plant and Equipment
Purchased intangible assets
Deferred Tax Liabilities, Intangible Assets
Partnership interest
Deferred Tax Liabilities, Partnership Interest
Deferred Tax Liabilities, Partnership Interest
Employee benefit contributions
Deferred Tax Liability, Tax Deferred Expenses, Compensation and Benefits, Employee Benefit Contributions
Deferred Tax Liability, Tax Deferred Expenses, Compensation and Benefits, Employee Benefit Contributions
Other
Deferred Tax Liabilities, Other
Total deferred tax liabilities
Deferred Tax Liabilities, Gross
Net deferred tax liabilities
Deferred Tax Liabilities, Net
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location
Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block]
Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location
Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]
Restructuring Expenses
Restructuring and Related Activities Disclosure [Text Block]
Expected term (in years)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term
Dividend yield (in percentage)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate
Deferred income taxes
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent
Net non-current deferred tax liabilities
Deferred Tax Liabilities, Net, Noncurrent
Leases
Operating Leases of Lessee Disclosure [Table Text Block]
Schedule of Certain Financial Statement Captions
Schedule Of Certain Financial Statement Captions [Text Block]
Schedule Of Certain Financial Statement Captions
Income Statement
Condensed Income Statement [Table Text Block]
Value of common stock issued to Lockheed Martin stockholders(1)
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable
Equity consideration for replacement awards
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Equity -based Awards
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Equity -based Awards
Preliminary working capital adjustments
Consideration Transfered, Working Capital Adjustment
Consideration Transfered, Working Capital Adjustment
Preliminary purchase price
Business Combination, Consideration Transferred
NSS
National Security Solutions [Member]
National Security Solutions [Member]
IS&GS
Information Systems & Global Solutions [Member]
Information Systems & Global Solutions [Member]
Goodwill [Roll Forward]
Goodwill [Roll Forward]
Beginning balance, Goodwill
Adjustments
Goodwill, Translation and Purchase Accounting Adjustments
Acquisition of the IS&GS Business
Goodwill, Acquired During Period
Ending balance, Goodwill
Schedule of Change in Accounting Estimate
Schedule of Change in Accounting Estimate [Table Text Block]
Schedule of Depreciation using Estimated Useful Lives
Schedule of Finite-Lived Intangible Assets
Schedule of Finite-Lived Intangible Assets [Table Text Block]
Legal Proceedings
Legal Matters and Contingencies [Text Block]
Term Loan A $310 million Due August 2021
Term Loan A Dollar Three Hundred and Ten Million Due August Twenty Twenty One [Member]
Term Loan A Dollar Three Hundred and Ten Million Due August Twenty Twenty One [Member]
Notes Which Mature In July 2032
Notes Which Mature On July Two Thousand Thirty Two [Member]
Notes Which Mature On July Two Thousand Thirty Two [Member]
Capital leases due on various dates through fiscal 2020
Capital Leases And Other Notes Payable Due On Various Dates Through Fiscal Two Thousand Twenty [Member]
Capital Leases And Other Notes Payable Due On Various Dates Through Fiscal Two Thousand Twenty One [Member]
Senior unsecured notes
Senior Notes
Other notes payable due on various dates through fiscal 2021
Total notes payable and long-term debt, net of current portion
Long-term Debt and Capital Lease Obligations
Less: current portion
Long-term Debt and Capital Lease Obligations, Current
Fair value of notes payable and long-term debt
Debt Instrument, Fair Value Disclosure
Effective interest rate
Debt Instrument, Interest Rate, Effective Percentage
Unsecured Debt
Unsecured Debt
Secured Debt
Secured Debt
Senior unsecured notes, face amount
Document Documentand Entity Information [Abstract]
Document Documentand Entity Information [Abstract]
Document Type
Document Type
Amendment Flag
Amendment Flag
Document Period End Date
Document Period End Date
Document Fiscal Year Focus
Document Fiscal Year Focus
Document Fiscal Period Focus
Document Fiscal Period Focus
Trading Symbol
Trading Symbol
Entity Registrant Name
Entity Registrant Name
Entity Central Index Key
Entity Central Index Key
Current Fiscal Year End Date
Current Fiscal Year End Date
Entity Well-known Seasoned Issuer
Entity Well-known Seasoned Issuer
Entity Current Reporting Status
Entity Current Reporting Status
Entity Voluntary Filers
Entity Voluntary Filers
Entity Filer Category
Entity Filer Category
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Entity Public Float
Entity Public Float
Income Taxes [Table]
Income Taxes [Table]
Income Taxes [Table]
Tax Period [Axis]
Tax Period [Axis]
Tax Period [Domain]
Tax Period [Domain]
Expiration in Calender Year 2018
Expiration Begin in Calender Year 2018 [Member]
Expiration Begins in Calender Year 2018 [Member]
Income Tax Authority [Axis]
Income Tax Authority [Axis]
Income Tax Authority [Domain]
Income Tax Authority [Domain]
Domestic Tax Authority
Domestic Tax Authority [Member]
State
State and Local Jurisdiction [Member]
Foreign Tax Authority
Foreign Tax Authority [Member]
Tax Credit Carryforward [Axis]
Tax Credit Carryforward [Axis]
Tax Credit Carryforward, Name [Domain]
Tax Credit Carryforward, Name [Domain]
Capital Loss Carryforward
Capital Loss Carryforward [Member]
Income Taxes [Line Items]
Income Taxes [Line Items]
Income Taxes [Line Items]
Effective income tax rate (in percentage)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Goodwill impairment charges
Tax benefit due to conversion of subsidiary to LLC from Partnership
Income Tax Expense Benefit Due to Conversion of Subsidiary to LLC from Corporation
Income Tax Expense Benefit Due to Conversion of Subsidiary to LLC from Corporation
Net operating loss carryforwards
Operating Loss Carryforwards
State tax credit carryforwards
Tax Credit Carryforward, Amount
State tax credits
Deferred Tax Assets, Tax Credit Carryforwards
Unrecognized tax benefits accrued interest and penalties
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued
Liabilities for uncertain tax positions
Liability For Uncertain Tax Positions
Liability For Uncertain Tax Positions
Liabilities for uncertain tax positions, long-term
Amount of reasonably possible resolution of reviews
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit
Compensation and Retirement Disclosure [Abstract]
Retirement Plans
Pension and Other Postretirement Benefits Disclosure [Text Block]
Statement of Comprehensive Income [Abstract]
Net income (loss)
Other comprehensive income (loss), net of taxes:
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Foreign currency translation adjustments, net of taxes of $1 million for fiscal 2016 and fiscal 2015
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax
Unrecognized gain on derivative instruments, net of taxes of ($10) million for fiscal 2016
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax
Pension liability adjustments, net of taxes of $2 million, ($2) million, $2 million and $3 million for fiscal 2016, the 11-month periods ended January 1, 2016 and January 2, 2015, and fiscal 2015, respectively
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax
Total other comprehensive income (loss), net of taxes
Comprehensive income (loss)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest
Less: comprehensive income attributable to non-controlling interest, net of taxes
Comprehensive income (loss) attributable to Leidos
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Schedule of Segment Reporting Information, by Segment [Table]
Schedule of Segment Reporting Information, by Segment [Table]
Concentration Risk Type [Axis]
Concentration Risk Type [Axis]
Concentration Risk Type [Domain]
Concentration Risk Type [Domain]
Government Contracts Concentration Risk
Government Contracts Concentration Risk [Member]
Major Customers [Axis]
US DoD
US DoD [Member]
US DoD [Member]
U.S. Government
U S Government [Member]
U S Government [Member]
U.S. Army
U S Army [Member]
U S Army [Member]
Maryland Procurement Office
Maryland Procurement Office [Member]
Maryland Procurement Office [Member]
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Percentage of sales
Concentration Risk, Percentage
2017
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months
2018
Finite-Lived Intangible Assets, Amortization Expense, Year Two
2019
Finite-Lived Intangible Assets, Amortization Expense, Year Three
2020
Finite-Lived Intangible Assets, Amortization Expense, Year Four
2021
Finite-Lived Intangible Assets, Amortization Expense, Year Five
2022 and thereafter
Finite-Lived Intangible Assets, Amortization Expense, after Year Five
Statement of Cash Flows [Abstract]
Cash flows from operations:
Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract]
Net income (loss)
Income (loss) from discontinued operations
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest
Adjustments to reconcile net income (loss) to net cash provided by continuing operations:
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Depreciation and amortization
Depreciation, Depletion and Amortization
Stock-based compensation
Share-based Compensation
Asset impairment charges
Gain on a real estate sale
Other
Other Noncash Expense
Change in assets and liabilities, net of effects of acquisitions and dispositions:
Increase (Decrease) in Operating Capital [Abstract]
Receivables
Increase (Decrease) in Receivables
Inventory, prepaid expenses and other current assets
Increase (Decrease) in Prepaid Expense and Other Assets
Accounts payable and accrued liabilities
Increase (Decrease) in Accounts Payable and Accrued Liabilities
Accrued payroll and employee benefits
Increase (Decrease) in Employee Related Liabilities
Increase (Decrease) in Income Taxes
Increase (Decrease) in Income Taxes
Increase (Decrease) in Other Noncurrent Assets and Liabilities, Net
Increase (Decrease) in Other Noncurrent Assets and Liabilities, Net
Total cash flows provided by operating activities of continuing operations
Net Cash Provided by (Used in) Operating Activities, Continuing Operations
Cash flows from investing activities:
Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract]
Payments for property, plant and equipment
Payments to Acquire Property, Plant, and Equipment
Acquisitions of businesses
Payments to Acquire Businesses, Net of Cash Acquired
Payments on accrued purchase price related to prior acquisition
Payments for (Proceeds from) Previous Acquisition
Net proceeds from sale of assets
Proceeds from Sale of Property, Plant, and Equipment
Total cash flows provided by investing activities of continuing operations
Net Cash Provided by (Used in) Investing Activities, Continuing Operations
Cash flows from financing activities:
Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract]
Payments of long-term debt
Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities
Payments on real estate financing transaction
Payments for Lease Termination Fees
Payments for Lease Termination Fees
Proceeds from debt issuance
Proceeds from Issuance of Debt
Payments for debt issuance costs
Payments of Debt Issuance Costs
Proceeds from issuances of stock
Proceeds from Issuance or Sale of Equity
Repurchases of stock and other
Special cash dividend payment
Payments of Dividends
Dividend payments
Payments of Ordinary Dividends
Other
Proceeds from (Payments for) Other Financing Activities
Total cash flows used in financing activities of continuing operations
Net Cash Provided by (Used in) Financing Activities, Continuing Operations
(Decrease) increase in cash and cash equivalents from continuing operations
Net Cash Provided by (Used in) Continuing Operations
Cash flows from discontinued operations:
Net Cash Provided by (Used in) Discontinued Operations [Abstract]
(Decrease) increase in cash and cash equivalents from discontinued operations
Cash Provided by (Used in) Operating Activities, Discontinued Operations
Cash (used in) provided by operating activities of discontinued operations
Cash Provided by (Used in) Investing Activities, Discontinued Operations
(Decrease) increase in cash and cash equivalents from discontinued operations
Net Cash Provided by (Used in) Discontinued Operations
Total (decrease) increase in cash and cash equivalents
Cash and Cash Equivalents, Period Increase (Decrease)
Cash and cash equivalents at beginning of year
Cash and Cash Equivalents, at Carrying Value, Including Discontinued Operations
Cash and cash equivalents at end of year
Shares of stock under stock awards
Awards granted (in shares)
Awards forfeited (in shares)
Weighted average grant- date fair value
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted average grant-date fair value, Awards granted (in dollars per share)
Weighted average grant-date fair value, Awards forfeited (in dollars per share)
Supplementary Cash Flow Information
Cash Flow, Supplemental Disclosures [Text Block]
National Security Solutions
Information Systems & Global Solutions
Corporate and Other
Corporate and Other [Member]
Revenues
Revenues
Operating income (loss)
Operating Income (Loss)
Operating Income (Loss) Margin
Operating Income (Loss) Margin
Operating Income (Loss) Margin
Amortization of intangible assets
Amortization of Intangible Assets
Equipment
Equipment [Member]
Building
Building [Member]
Building improvements and leasehold improvements
Building Improvements And Leasehold Improvements [Member]
Building Improvements And Leasehold Improvements [Member].
Estimated useful lives (in years)
Property, Plant and Equipment, Estimated Useful Lives
Estimated useful lives (in years)
Property, Plant and Equipment, Useful Life
Schedule of Provision for Income Taxes
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Schedule of Reconciliation of Provision for Income Taxes
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Schedule of Deferred Tax Assets (Liabilities)
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Schedule of Net Deferred Tax Assets
Schedule Of Classified Deferred Tax Assets And Liabilities Table [Text Block]
Schedule Of Classified Deferred Tax Assets And Liabilities
Schedule of Changes in Unrecognized Tax Benefits
Summary of Income Tax Contingencies [Table Text Block]
Divestitures
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]
Operating lease Commitment
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2017
Operating Leases, Future Minimum Payments Due, Next Twelve Months
2018
Operating Leases, Future Minimum Payments, Due in Two Years
2019
Operating Leases, Future Minimum Payments, Due in Three Years
2020
Operating Leases, Future Minimum Payments, Due in Four Years
2021
Operating Leases, Future Minimum Payments, Due in Five Years
2022 and thereafter
Operating Leases, Future Minimum Payments, Due Thereafter
Total
Operating Leases, Future Minimum Payments Due
Sublease receipts
Operating Leases, Future Minimum Payments Receivable [Abstract]
2017
Operating Leases, Future Minimum Payments Receivable, Current
2018
Operating Leases, Future Minimum Payments Receivable, in Two Years
2019
Operating Leases, Future Minimum Payments Receivable, in Three Years
2020
Operating Leases, Future Minimum Payments Receivable, in Four Years
2021
Operating Leases, Future Minimum Payments Receivable, in Five Years
2022 and thereafter
Operating Leases, Future Minimum Payments Receivable, Thereafter
Total
Operating Leases, Future Minimum Payments Receivable
Other Commitments and Contingencies
Commitments and Contingencies Disclosure [Text Block]
Title of Individual [Axis]
Title of Individual [Axis]
Relationship to Entity [Domain]
Relationship to Entity [Domain]
Outside Directors
Outside Directors [Member]
Outside Directors [Member]
Award Date [Axis]
Award Date [Axis]
Award Date [Domain]
Award Date [Domain]
Vesting period (in years)
Schedule of Discontinued Operations
Disposal Groups, Including Discontinued Operations [Table Text Block]
Schedule of Intangible Assets Including Estimates of Assets Acquired
Schedule of Intangible Assets and Goodwill [Table Text Block]
Schedule of Amortization Expense for Finite-Lived Intangible Assets
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
Reconciliation of Weighted Average Number of Shares Outstanding
Schedule of Weighted Average Number of Shares [Table Text Block]
Schedule Of Basic and Diluted EPS
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Schedule Of Stock-Based Awards Excluded from Weighted Average Shares Outstanding
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
Statement of Financial Position [Abstract]
ASSETS
Assets [Abstract]
Current assets:
Assets, Current [Abstract]
Cash and cash equivalents
Cash and Cash Equivalents, at Carrying Value
Receivables, net
Receivables, Net, Current
Inventory, prepaid expenses and other current assets
Prepaid Expense and Other Assets, Current
Total current assets
Assets, Current
Property, plant and equipment, net
Intangible assets, net
Other assets
Other Assets, Noncurrent
Total assets
Assets
LIABILITIES AND STOCKHOLDER’S EQUITY
Liabilities and Equity [Abstract]
Current liabilities:
Liabilities, Current [Abstract]
Accrued payroll and employee benefits
Dividends payable
Dividends Payable, Current
Income taxes payable
Taxes Payable, Current
Notes payable and long-term debt, current portion
Debt, Current
Liabilities of discontinued operations
Disposal Group, Including Discontinued Operation, Liabilities, Current
Total current liabilities
Liabilities, Current
Notes payable and long-term debt, net of current portion
Deferred tax liabilities
Other long-term liabilities
Commitments and contingencies (Notes 17, 20 and 21)
Commitments and Contingencies
Total liabilities and stockholders' equity
Liabilities and Equity
Stockholder's equity:
Stockholders' Equity Attributable to Parent [Abstract]
Preferred stock, $.0001 par value,10 million shares authorized and no shares issued and outstanding at December 30, 2016 and January 1, 2016
Preferred Stock, Value, Issued
Common stock, $.0001 par value, 500 million shares authorized, 150 million and 72 million shares issued and outstanding at December 30, 2016, and January 1, 2016, respectively
Common Stock, Value, Issued
Additional paid-in capital
Additional Paid in Capital
Accumulated deficit
Retained Earnings (Accumulated Deficit)
Accumulated other comprehensive loss
Accumulated Other Comprehensive Income (Loss), Net of Tax
Non-controlling interest
Stockholders' Equity Attributable to Noncontrolling Interest
Total equity
Total stockholder's equity
Stockholders' Equity Attributable to Parent
Old Revolving Credit Facility
Old Revolving Credit Facility [Member]
Old Revolving Credit Facility [Member]
Revolving credit facility financial covenants description
Line of Credit Facility, Covenant Compliance
Ratio of consolidated funded debt to earnings before interest taxes depreciation and amortization numerator maximum, until Feb 16, 2018
Ratio Of Consolidated Funded Debt To Earnings Before Interest Taxes Depreciation And Amortization Numerator Maximum, Until February Sixteen Twenty Eighteen
Ratio Of Consolidated Funded Debt To Earnings Before Interest Taxes Depreciation And Amortization Numerator Maximum, Until February Sixteen Twenty Eighteen
Ratio of consolidated funded debt to earnings before interest taxes depreciation and amortization numerator maximum, from Feb 16, 2018 to Feb 16, 2019
Ratio Of Consolidated Funded Debt To Earnings Before Interest Taxes Depreciation And Amortization Numerator Maximum, From February Sixteen Twenty Eighteen to February Sixteen Twenty Nineteen
Ratio Of Consolidated Funded Debt To Earnings Before Interest Taxes Depreciation And Amortization Numerator Maximum, From February Sixteen Twenty Eighteen to February Sixteen Twenty Nineteen
Ratio of consolidated funded debt to earnings before interest taxes depreciation and amortization numerator, after Feb 16, 2019
Ratio Of Consolidated Funded Debt To Earnings Before Interest Taxes Depreciation And Amortization Numerator, After February Sixteen Twenty Nineteen
Ratio Of Consolidated Funded Debt To Earnings Before Interest Taxes Depreciation And Amortization, Numerator, Maximum
Pension and Other Postretirement Benefits Disclosure [Table]
Pension And Other Postretirement Benefits Disclosure [Table]
Pension and Other Postretirement Benefits Disclosure [Table]
Postretirement Benefits, Type of Deferred Compensation [Axis]
Other Postretirement Benefits, Individual Contracts, Type of Deferred Compensation [Axis]
Other Postretirement Benefits, Individual Contracts, Type of Deferred Compensation [Domain]
Other Postretirement Benefits, Individual Contracts, Type of Deferred Compensation [Domain]
Deferred Compensation Plans
Deferred Compensation Arrangement with Individual, by Type of Compensation, Pension and Other Postretirement Benefits [Member]
Pension and Other Postretirement Benefits Disclosure [Line Items]
Pension And Other Postretirement Benefits Disclosure [Line Items]
Pension and Other Postretirement Benefits Disclosure [Line Items]
Compensation expense
Defined Contribution Plan, Cost Recognized
Maximum percentage certain employees can defer from salary for certain plans
Participants Maximum Percentage Of Eligible Salary Defer
Participants maximum percentage that an employee can defer of their eligible salary for 401 (k) plan.
Projected benefit obligation
Defined Benefit Plan, Benefit Obligation
Fair value of plan assets
Defined Benefit Plan, Fair Value of Plan Assets
Funded status of plan
Defined Benefit Plan, Funded Status of Plan
Property, Plant and Equipment
Property, Plant and Equipment Disclosure [Text Block]
Debt
Long-term Debt [Text Block]
Schedule of Accounts Receivable
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
Composition of Certain Financial Statement Captions
Composition Of Certain Financial Statement Captions [Text Block]
Composition Of Certain Financial Statement Captions
Schedule of Finite-Lived Intangible Assets [Table]
Schedule of Finite-Lived Intangible Assets [Table]
Vitalize and maxIT
Vitalize and maxIT [Member]
Vitalize and maxIT [Member]
Reveal Imaging Technologies, Inc.
Reveal Imaging Technologies, Inc. [Member]
Reveal Imaging Technologies, Inc. [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets [Line Items]
Cash dividend per share
Common Stock, Dividends, Per Share, Declared
Dividends declared and other
Dividends Payable
Capital lease obligations
Capital Lease Obligations Incurred
Promissory note, net received from a real estate sale
Other Significant Noncash Transaction, Value of Consideration Received
Cash paid for interest
Interest Paid
Cash paid for income taxes, net of refunds (including discontinued operations)
Income Taxes Paid
Foreign currency translation adjustments, tax
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax
Unrecognized gain on derivative instruments, tax
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax
Pension liability adjustments, tax
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax
Gross rental expense
Operating Leases, Rent Expense, Minimum Rentals
Less lease and sublease income
Operating Leases, Income Statement, Sublease Revenue
Net rental expense
Operating Leases, Rent Expense
Operating income
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest
Income from continuing operations
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent
Less: net income attributable to non-controlling interest, net of taxes
Net Income (Loss) Attributable to Noncontrolling Interest
Income from discontinued operations
Net income (loss) attributable to Leidos common stockholders
Net Income (Loss) Attributable to Parent
Basic earnings (loss) per share ( usd per share)
Diluted earnings per share attributable to Leidos common stockholders( usd per share)
Amount computed at the statutory federal income tax rate (35%)
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount
State income taxes, net of federal tax benefit
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount
Taxable conversion of subsidiary
Effective Income Tax Rate Reconciliation Taxable Conversion of Subsidiary from Corporation to Limited Liability Company
Effective Income Tax Rate Reconciliation Taxable Conversion of Subsidiary from Corporation to Limited Liability Company
Change in valuation allowance for deferred tax assets
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount
Change in accruals for uncertain tax positions
Effective Income Tax Rate Reconciliation, Tax Contingency, Amount
Research and development credits
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount
Dividends paid to employee stock ownership plan
Effective Income Tax Rate Reconciliation, Deduction, Employee Stock Ownership Plan Dividend, Amount
Capitalized transaction costs
Effective Income Tax Rate Reconciliation,Capitalized Transaction Costs
Effective Income Tax Rate Reconciliation,Capitalized Transaction Costs
Excess tax benefits from stock-based compensation
Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount
Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount
Non-deductible goodwill
Income Tax Reconciliation, Non Deductible Expense, Goodwill Impairment
Income Tax Reconciliation, Non Deductible Expense, Goodwill Impairment
Other
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount
Effective income tax rate
Effective Income Tax Rate Reconciliation, Percent
Equity Award [Domain]
Employee Stock Purchase Plan
Employee Stock Purchase Plan [Member]
Employee Stock Purchase Plan [Member]
Tax benefits from stock options exercised
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options
Fair value of stock surrendered in payment of the exercise price for stock options exercised
Fair Value of Stock Surrendered in Payment of Exercise Price for Stock Options Exercised
Fair Value of Stock Surrendered in Payment of Exercise Price for Stock Options Exercised
Percentage of stock awards vest or exercisable after three years
Percentage Of Stock Awards Vest Or Exercisable After Three Years
Percentage Of Stock Awards Vest Or Exercisable After Three Years
Percentage of stock awards vest or exercisable after four years
Percentage Of Stock Awards Vest Or Exercisable After Four Years
Percentage Of Stock Awards Vest Or Exercisable After Four Years
Percentage of stock awards vest or exercisable, every year
Percentage Of Stock Awards Vest Or Exercisable
Percentage Of Stock Awards Vest Or Exercisable
Stock reserved for future issuance
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant
Percentage of stock compensation plans awards that vest after January 1, 2006
Percentage Of Stock Compensation Plans Awards Vest After Vesting Period
Percentage Of Stock Compensation Plans Awards Vest After Certain Date
Percentage of market price per share for stock purchase program
Percentage Of Market Price of Shares For Stock Purchase Program
Percentage Of Market Price of Shares For Stock Purchase Program
Percentage of market price for employee purchase program for stock purchases during non-compensatory period
Percentage Of Market Price During Non Compensatory Period
Percentage Of Market Price During Non Compensatory Period
Shares reserved for future issuance (in shares)
Common Stock, Capital Shares Reserved for Future Issuance
Percentage of revenues contributed by external customers to total revenues
Basis For Attributing Revenues From External Customers
Basis For Attributing Revenues From External Customers
Schedule of Business Acquisitions, by Acquisition
Schedule of Business Acquisitions, by Acquisition [Table Text Block]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]
Business Acquisition, Pro Forma Information
Business Acquisition, Pro Forma Information [Table Text Block]
Derivative [Table]
Derivative [Table]
Scenario, Forecast
Scenario, Forecast [Member]
Cash flow interest rate swaps
Cash Flow Hedging [Member]
Notes Payable and Long Term Debt, Net of Current Portion
Notes Payable and Long Term Debt, Net of Current Portion [Member]
Notes Payable and Long Term Debt, Net of Current Portion [Member]
Other assets
Other Assets [Member]
Derivative [Line Items]
Derivative [Line Items]
Hedged instrument, face amount
Derivative Liability, Notional Amount
Stated interest rate
Derivative, Fixed Interest Rate
Other assets
Derivative Asset, Fair Value, Gross Asset
Fair value adjustment
Liabilities, Fair Value Adjustment
Effective portion recognized in other comprehensive income
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net
Effective portion reclassified from accumulated other comprehensive loss to earnings
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net
Ineffective portion recognized in earnings
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net
Loss to be recognized in the next 12 months
Derivative Instruments, Loss Recognized in Other Comprehensive Income (Loss), Effective Portion
Income Statement [Abstract]
Cost of revenues
Cost of Revenue
Selling, general and administrative expenses
Selling, General and Administrative Expense
Restructuring expenses
Equity earnings of non-consolidated subsidiaries
Income (Loss) from Equity Method Investments
Operating income (loss)
Interest income
Interest Income, Other
Interest expense
Interest Expense
Other (expense) income, net
Income tax expense
Income (loss) from continuing operations
Discontinued operations:
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract]
Loss from discontinued operations before income taxes
Income tax benefit
Discontinued Operation, Tax Effect of Discontinued Operation
(Loss) income from discontinued operations
Net income (loss)
Earnings (loss) per share:
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits at beginning of year
Unrecognized Tax Benefits
Additions for tax positions related to current year
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions
Additions for tax positions related to prior years
Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions And Settlements With Tax Authorities
Unrecognized tax benefits increases resulting from prior period tax positions and settlements with tax authorities.
Reductions for tax positions related to prior years
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions
Settlements with taxing authorities
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities
Lapse of statute of limitations
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations
Unrecognized tax benefits at end of year
Unrecognized tax benefits that, if recognized, would affect the effective income tax rate
Unrecognized Tax Benefits that Would Impact Effective Tax Rate
Income Taxes
Income Tax Disclosure [Text Block]
Restricted Stock Units (RSUs)
Restricted Stock Units (RSUs) [Member]
Type of Arrangement and Non-arrangement Transactions [Axis]
Type of Arrangement and Non-arrangement Transactions [Axis]
Arrangements and Non-arrangement Transactions [Domain]
Arrangements and Non-arrangement Transactions [Domain]
Group One
Group One [Member]
Group One [Member]
Stock issued during the period (in shares)
Stock Issued During Period, Shares, New Issues
Stock issued during the period
Stock Issued During Period, Value, New Issues
Compensation not yet recognized
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options
Restructuring and Related Costs
Restructuring and Related Costs [Table Text Block]
Schedule of Restructuring Reserve
Schedule of Restructuring Reserve by Type of Cost [Table Text Block]
Preferred stock, par value (usd per share)
Preferred Stock, Par or Stated Value Per Share
Preferred stock, shares authorized (shares)
Preferred Stock, Shares Authorized
Preferred stock, shares issued (shares)
Preferred Stock, Shares Issued
Preferred stock, shares outstanding (shares)
Preferred Stock, Shares Outstanding
Common stock, par value (usd per share)
Common Stock, Par or Stated Value Per Share
Common stock, shares authorized (shares)
Common Stock, Shares Authorized
Common stock, shares issued (shares)
Common Stock, Shares, Issued
Common stock, shares outstanding (shares)
Common Stock, Shares, Outstanding
Shares of stock under stock options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, beginning balance (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number
Options granted (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross
Special dividend adjustments (in shares)
Share Based Compensation Arrangement By Share Based Payment Award Options Adjustment For Special Cash Dividend
Share Based Compensation Arrangement By Share Based Payment Award Options Adjustment For Special Cash Dividend
Options forfeited or expired (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period
Options exercised (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period
Outstanding, ending balance (in shares)
Exercisable at year end (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number
Vested and expected to vest in the future as of year end (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number
Weighted average exercise price
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Outstanding, beginning balance (in usd per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price
Options granted (in usd per share)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price
Options forfeited or expired (in usd per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price
Options exercised (in usd per share)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price
Outstanding, ending balance (in usd per share)
Exercisable at year end (in usd per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price
Vested and expected to vest in the future as of year end
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price
Weighted average remaining contractual term and Aggregate intrinsic value
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted average remaining contractual term, Outstanding (in years)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term
Weighted average remaining contractual term, Exercisable at year end (in years)
Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Remaining Contractual Term 2
Share based Compensation Arrangement By Share based Payment Award Options Exercisable Weighted Average Remaining Contractual Term 2
Weighted average remaining contractual term, Vested and expected to vest (in years)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term
Aggregate intrinsic value, Outstanding, beginning balance
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value
Aggregate intrinsic value, Outstanding, Option Exercised
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value
Aggregate intrinsic value, Outstanding, ending balance
Aggregate intrinsic value, Exercisable
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value
Aggregate intrinsic value, Outstanding, Vested and expected to vest
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value
Derivative Instruments and Hedging Activities
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Receivables
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]
Schedule of Changes in Goodwill by Segment
Schedule of Goodwill [Table Text Block]
Significant Accounting Policies [Table]
Significant Accounting Policies [Table]
Significant Accounting Policies [Table]
Long-term Debt
Long-term Debt [Member]
Adjustments for New Accounting Pronouncements [Axis]
Adjustments for New Accounting Pronouncements [Axis]
Type of Adoption [Domain]
Type of Adoption [Domain]
Accounting Standards Update 2016-09, Excess Tax Benefit Component
Accounting Standards Update 2016-09, Excess Tax Benefit Component [Member]
Accounting Standards Update 2016-09, Excess Tax Benefit Component [Member]
Accounting Standards Update 2015-03
Accounting Standards Update 2015-03 [Member]
Measurement Basis [Axis]
Measurement Basis [Axis]
Fair Value Measurement [Domain]
Fair Value Measurement [Domain]
Portion at Fair Value Measurement [Member]
Portion at Fair Value Measurement [Member]
Reported Value Measurement
Reported Value Measurement [Member]
New Accounting Pronouncement, Early Adoption [Axis]
New Accounting Pronouncement, Early Adoption [Axis]
New Accounting Principles, Early Adoption [Domain]
New Accounting Principles, Early Adoption [Domain]
New Accounting Pronouncement, Early Adoption, Effect
New Accounting Pronouncement, Early Adoption, Effect [Member]
Customer relationships
Programs and contract intangibles
Software and technology
Backlog
Significant Accounting Policies [Line Items]
Significant Accounting Policies [Line Items]
Significant Accounting Policies [Line Items]
Ownership interest (in percentage)
Equity Method Investment, Ownership Percentage
Notes receivable, fair value disclosure
Notes Receivable, Fair Value Disclosure
Useful life of intangible assets
Finite-Lived Intangible Asset, Useful Life
Internal research and development costs included in selling, general and administrative expenses
Research and Development Expense
Cash flows provided by operating activities of continuing operations
Net Cash Provided by (Used in) Financing Activities, Continuing Operations