Entity Central Index Key Amount of cash collected and remitted to the Purchaser as of the balance sheet date for sales of receivables under the MARPA Facility. Cash collections not remitted to the Purchaser for sales of receivables under the MARPA Facility. Remaining sold receivables under the MARPA Facility. Document and entity information. Document And Entity Information [Abstract] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Trading Symbol Trading Symbol Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Common Stock, Shares Outstanding Entity Common Stock Shares Outstanding Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Income Statement [Abstract] Revenue Revenue From Contract With Customer Excluding Assessed Tax Costs of revenue: Cost Of Revenue [Abstract] Direct costs Direct Operating Costs Indirect costs and selling expenses Selling General And Administrative Expense Depreciation and amortization Depreciation And Amortization Total costs of revenue Cost Of Revenue Income from operations Operating Income Loss Interest expense and other, net Interest Expense Income before income taxes Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest Income tax expense (benefit) Income Tax Expense Benefit Net income Net Income Loss Basic earnings per share Earnings Per Share Basic Diluted earnings per share Earnings Per Share Diluted Weighted-average basic shares outstanding Weighted Average Number Of Shares Outstanding Basic Weighted-average diluted shares outstanding Weighted Average Number Of Diluted Shares Outstanding Statement Of Income And Comprehensive Income [Abstract] Net income Other comprehensive income (loss): Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract] Foreign currency translation adjustment Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent Change in fair value of interest rate swap agreements, net of tax Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax Other comprehensive income (loss), net of tax Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent Comprehensive income Comprehensive Income Net Of Tax Statement Of Financial Position [Abstract] ASSETS Assets [Abstract] Current assets: Assets Current [Abstract] Cash and cash equivalents Cash And Cash Equivalents At Carrying Value Accounts receivable, net Accounts Receivable Net Current Prepaid expenses and other current assets Prepaid Expense And Other Assets Current Total current assets Assets Current Goodwill Goodwill Intangible assets, net Finite Lived Intangible Assets Net Property and equipment, net Property Plant And Equipment Net Supplemental retirement savings plan assets Deferred Compensation Plan Assets Accounts receivable, long-term Accounts Receivable Net Noncurrent Other long-term assets Other Assets Noncurrent Total assets Assets LIABILITIES AND SHAREHOLDERS’ EQUITY Liabilities And Stockholders Equity [Abstract] Current liabilities: Liabilities Current [Abstract] Current portion of long-term debt Long Term Debt Current Accounts payable Accounts Payable Current Accrued compensation and benefits Employee Related Liabilities Current Other accrued expenses and current liabilities Other Accrued Liabilities Current Total current liabilities Liabilities Current Long-term debt, net of current portion Long Term Debt Noncurrent Supplemental retirement savings plan obligations, net of current portion Deferred Compensation Liability Classified Noncurrent Deferred income taxes Deferred Tax Liabilities Noncurrent Other long-term liabilities Other Liabilities Noncurrent Total liabilities Liabilities COMMITMENTS AND CONTINGENCIES Commitments And Contingencies Shareholders’ equity: Stockholders Equity Including Portion Attributable To Noncontrolling Interest [Abstract] Preferred stock $0.10 par value, 10,000 shares authorized, no shares issued or outstanding Preferred Stock Value Common stock $0.10 par value, 80,000 shares authorized; 42,304 shares issued and 24,871 outstanding at March 31, 2019 and 42,139 shares issued and 24,704 outstanding at June 30, 2018 Common Stock Value Additional paid-in capital Additional Paid In Capital Common Stock Retained earnings Retained Earnings Accumulated Deficit Accumulated other comprehensive loss Accumulated Other Comprehensive Income Loss Net Of Tax Treasury stock, at cost (17,434 and 17,434 shares, respectively) Treasury Stock Value Total CACI shareholders’ equity Stockholders Equity Noncontrolling interest Minority Interest Total shareholders’ equity Stockholders Equity Including Portion Attributable To Noncontrolling Interest Total liabilities and shareholders’ equity Liabilities And Stockholders Equity Preferred stock, par value (in dollars per share) Preferred Stock Par Or Stated Value Per Share Preferred stock, shares authorized Preferred Stock Shares Authorized Preferred stock, shares issued Preferred Stock Shares Issued Preferred stock, shares outstanding Preferred Stock Shares Outstanding Common stock, par value (in dollars per share) Common Stock Par Or Stated Value Per Share Common stock, shares authorized Common Stock Shares Authorized Common stock, shares issued Common Stock Shares Issued Common stock, shares outstanding Common Stock Shares Outstanding Treasury stock, shares at cost Treasury Stock Shares Increase decrease in long term liabilities. Tenant improvement financed by landlord. Statement Of Cash Flows [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES Net Cash Provided By Used In Operating Activities [Abstract] Net income Profit Loss Reconciliation of net income to net cash provided by operating activities: Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] Amortization of deferred financing costs Amortization Of Financing Costs And Discounts Stock-based compensation expense Share Based Compensation Deferred income taxes Deferred Income Tax Expense Benefit Changes in operating assets and liabilities, net of effect of business acquisitions: Increase Decrease In Operating Capital [Abstract] Accounts receivable, net Increase Decrease In Accounts Receivable Prepaid expenses and other assets Increase Decrease In Prepaid Deferred Expense And Other Assets Accounts payable and other accrued expenses Increase Decrease In Accounts Payable And Accrued Liabilities Accrued compensation and benefits Increase Decrease In Accrued Salaries Income taxes payable and receivable Increase Decrease In Income Taxes Receivable Long-term liabilities Increase Decrease In Long Term Liabilities Net cash provided by operating activities Net Cash Provided By Used In Operating Activities CASH FLOWS FROM INVESTING ACTIVITIES Net Cash Provided By Used In Investing Activities [Abstract] Capital expenditures Payments To Acquire Productive Assets Cash paid for business acquisitions, net of cash acquired Payments To Acquire Businesses Net Of Cash Acquired Other Payments For Proceeds From Other Investing Activities Net cash used in investing activities Net Cash Provided By Used In Investing Activities CASH FLOWS FROM FINANCING ACTIVITIES Net Cash Provided By Used In Financing Activities [Abstract] Proceeds from borrowings under bank credit facilities Proceeds From Lines Of Credit Principal payments made under bank credit facilities Repayments Of Long Term Debt Payment of financing costs under bank credit facilities Payments Of Financing Costs Payment of contingent consideration Payment For Contingent Consideration Liability Financing Activities Proceeds from employee stock purchase plans Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Repurchases of common stock Payments For Repurchase Of Common Stock Payment of taxes for equity transactions Payments Related To Tax Withholding For Share Based Compensation Net cash provided by (used in) financing activities Net Cash Provided By Used In Financing Activities Effect of exchange rate changes on cash and cash equivalents Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Net increase (decrease) in cash and cash equivalents Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect Cash and cash equivalents at beginning of period Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Cash and cash equivalents at end of period SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION Supplemental Cash Flow Information [Abstract] Cash paid during the period for income taxes, net of refunds Income Taxes Paid Net Cash paid during the period for interest Interest Paid Net Non-cash financing and investing activities: Cash Flow Noncash Investing And Financing Activities Disclosure [Abstract] Landlord sponsored tenant improvement Tenant Improvement Financed By Landlord Accrued capital expenditures Capital Expenditures Incurred But Not Yet Paid Statement Of Stockholders Equity [Abstract] Statement [Table] Statement [Table] Equity Components Statement Equity Components [Axis] Equity Component Equity Component [Domain] Common Stock Common Stock [Member] Additional Paid-in Capital Additional Paid In Capital [Member] Retained Earnings Retained Earnings [Member] Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income [Member] Treasury Stock Treasury Stock [Member] Total CACI Shareholders' Equity Parent [Member] Noncontrolling Interest Noncontrolling Interest [Member] Statement [Line Items] Statement [Line Items] Beginning balance Beginning balance, shares Shares Issued Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase Decrease In Stockholders Equity Roll Forward Cumulative effect adjustment of ASC 606, net of taxes Cumulative Effect Of New Accounting Principle In Period Of Adoption Stock-based compensation expense Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value Tax withholdings on restricted share vesting Restricted Stock Value Shares Issued Net Of Tax Withholdings Tax withholdings on restricted share vesting (in shares) Restricted Stock Shares Issued Net Of Shares For Tax Withholdings Change in fair value of interest rate swap agreements, net Currency translation adjustment Repurchases of common stock Treasury Stock Value Acquired Cost Method Repurchases of common stock (in shares) Treasury Stock Shares Acquired Treasury stock issued under stock purchase plans Stock Issued During Period Value Employee Stock Purchase Plan Treasury stock issued under stock purchase plans (in shares) Stock Issued During Period Shares Employee Stock Purchase Plans Post-retirement benefit costs Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax Ending balance Ending balance, shares Organization Consolidation And Presentation Of Financial Statements [Abstract] Basis of Presentation Organization Consolidation And Presentation Of Financial Statements Disclosure [Text Block] New Accounting Pronouncements And Changes In Accounting Principles [Abstract] Recent Accounting Pronouncements New Accounting Pronouncements And Changes In Accounting Principles [Text Block] Accounting Policies [Abstract] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Business Combinations [Abstract] Acquisitions Business Combination Disclosure [Text Block] Finite Lived Intangible Assets Net [Abstract] Intangible Assets Intangible Assets Disclosure [Text Block] Goodwill And Intangible Assets Disclosure [Abstract] Goodwill Goodwill Disclosure [Text Block] Revenue From Contract With Customer [Abstract] Revenue Recognition Revenue From Contract With Customer [Text Block] Contract with customer asset and liability. Contract Balances Contract With Customer Asset And Liability [Text Block] Transfers And Servicing Of Financial Assets [Abstract] Sales of Receivables Transfers And Servicing Of Financial Assets [Text Block] Long Term Debt [Abstract] Long-term Debt Long Term Debt [Text Block] Commitments And Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments And Contingencies Disclosure [Text Block] Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] Stock-Based Compensation Disclosure Of Compensation Related Costs Share Based Payments [Text Block] Earnings Per Share [Abstract] Earnings Per Share Earnings Per Share [Text Block] Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Segment Reporting [Abstract] Business Segment Information Segment Reporting Disclosure [Text Block] Fair Value Disclosures [Abstract] Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Subsequent Events [Abstract] Subsequent Events Subsequent Events [Text Block] Basis of Presentation Basis Of Accounting Policy Policy [Text Block] Recent Accounting Pronouncements New Accounting Pronouncements Policy Policy [Text Block] Revenue Recognition Revenue Recognition Policy [Text Block] Contract assets. Contract Assets Contract Assets Policy [Text Block] Contract liabilities. Contract Liabilities Contract Liabilities Policy [Text Block] Remaining performance obligations. Remaining Performance Obligations Remaining Performance Obligations Policy [Text Block] Adjustments for New Accounting Pronouncements Adjustments For New Accounting Pronouncements [Axis] Type of Adoption Type Of Adoption [Member] ASU 2014-09 Accounting Standards Update201409 [Member] Summary of Impact of Adoption of ASC 606 on Financial Statements Schedule Of New Accounting Pronouncements And Changes In Accounting Principles [Text Block] Schedule Of Business Acquisitions By Acquisition [Table] Schedule Of Business Acquisitions By Acquisition [Table] Business Acquisition Business Acquisition [Axis] Business Acquisition, Acquiree Business Acquisition Acquiree [Domain] LGS innovations. LGS L G S Innovations [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Assets Acquired and Liabilities Assumed Schedule Of Business Acquisitions By Acquisition [Text Block] Schedule of Unaudited Pro Forma Results of Operations Business Acquisition Pro Forma Information [Text Block] Schedule of Intangible Assets Schedule Of Finite Lived Intangible Assets Table [Text Block] Expected Amortization Expense Scheduleof Finite Lived Intangible Assets Future Amortization Expense Table [Text Block] Roll Forward of Goodwill Schedule Of Goodwill [Text Block] Disaggregation of Revenue by Contract Type, Customer Information and Prime or Subcontractor Disaggregation Of Revenue Table [Text Block] Contract Assets and Liabilities Contract With Customer Asset And Liability Table [Text Block] Summary of MARPA Facility Activity Transfer Of Financial Assets Accounted For As Sales Table [Text Block] Schedule of Long-term Debt Schedule Of Debt Table [Text Block] Cash Flow Hedges Schedule Of Derivative Instruments Gain Loss In Statement Of Financial Performance [Text Block] Aggregate Maturities of Long-term Debt Schedule Of Maturities Of Long Term Debt Table [Text Block] Stock-Based Compensation Expense and Related Tax Benefits Recognized Schedule Of Compensation Cost For Share Based Payment Arrangements Allocation Of Share Based Compensation Costs By Plan Table [Text Block] Annual Performance-Based Awards Granted Schedule Of Nonvested Performance Based Units Activity Table [Text Block] Summary of Activity Related to RSUs Schedule Of Sharebased Compensation Restricted Stock And Restricted Stock Units Activity Table [Text Block] Calculation of Basic and Diluted Earnings per Share Schedule Of Earnings Per Share Basic And Diluted Table [Text Block] Business Segment Information [Abstract] Summarized Financial Information of Reportable Segments Schedule Of Segment Reporting Information By Segment [Text Block] Recurring Fair Value Measurements Schedule Of Fair Value Assets And Liabilities Measured On Recurring Basis Table [Text Block] Payments For Proceeds From Life Insurance Policies [Abstract] Proceeds from settlement of corporate owned life insurance (COLI) Proceeds From Life Insurance Policies Revenue Initial Application Period Cumulative Effect Transition [Table] Revenue Initial Application Period Cumulative Effect Transition [Table] Initial Application Period Cumulative Effect Transition Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition Initial Application Period Cumulative Effect Transition [Domain] Under ASC 605 Calculated Under Revenue Guidance In Effect Before Topic606 [Member] Adjustments Due to ASC 606 Difference Between Revenue Guidance In Effect Before And After Topic606 [Member] Revenue Initial Application Period Cumulative Effect Transition [Line Items] Revenue Initial Application Period Cumulative Effect Transition [Line Items] Effect of ASC 606 Total costs of revenue Income from operations Income before taxes Initial net working capital payment. Systems engineering and acquisition support services business. SE&A BU Systems Engineering And Acquisition Support Services Business [Member] Acquisition date Business Acquisition Effective Date Of Acquisition1 Cash consideration Payments To Acquire Businesses Gross Consideration, initial net working capital payment Business Combination Consideration Transferred Initial Net Working Capital Payment Identifiable intangible assets Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangible Assets Other Than Goodwill Mastodon design. Mastodon Mastodon Design [Member] Finite-Lived Intangible Assets by Major Class Finite Lived Intangible Assets By Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name Finite Lived Intangible Assets Major Class Name [Domain] Represents information about customer contracts and related customer relationships. Customer contracts and related customer relationships Customer Contracts And Related Customer Relationships [Member] Technology Technology Based Intangible Assets [Member] Range Range [Axis] Range Range [Member] Minimum Minimum [Member] Maximum Maximum [Member] Purchase consideration Business Combination Consideration Transferred1 Deferred consideration Business Combination Consideration Transferred Liabilities Incurred Amortization period of acquired intangible assets Acquired Finite Lived Intangible Assets Weighted Average Useful Life Amount of tax deductible goodwill and intangibles Business Acquisition Purchase Price Allocation Goodwill Expected Tax Deductible Amount Aggregate estimated post-close purchase price adjustments. Cash consideration Purchase consideration adjustments, net Purchase Consideration Adjustments Net Business combination recognized identifiable assets acquired and liabilities assumed accounts receivable long term. Represents business combination recognized identifiable assets acquired and liabilities assumed accrued compensation and benefits. Accounts receivable Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Receivables Prepaid expenses and other current assets Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Prepaid Expense And Other Assets Property and equipment Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Property Plant And Equipment Accounts receivable, long-term Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Accounts Receivable Long Term Other long-term assets Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Other Noncurrent Assets Accounts payable Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities Accounts Payable Accrued compensation and benefits Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Employee Related Liabilities Current Other accrued expenses and current liabilities Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities Other Deferred income taxes Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deferred Tax Assets Noncurrent Other long-term liabilities Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Noncurrent Liabilities Other Total estimated consideration Business Combination Recognized Identifiable Assets Acquired Goodwill And Liabilities Assumed Net Net income Amortization expense Amortization Of Intangible Assets Acquisition-related expenses Business Combination Acquisition Related Costs Integration and restructuring costs Business Combination Integration Related Costs Revenue Business Acquisitions Pro Forma Revenue Net income Business Acquisitions Pro Forma Net Income Loss Basic EPS Business Acquisition Pro Forma Earnings Per Share Basic Diluted EPS Business Acquisition Pro Forma Earnings Per Share Diluted Schedule Of Finite Lived Intangible Assets [Table] Schedule Of Finite Lived Intangible Assets [Table] Acquired technologies Other Other Intangible Assets [Member] Finite Lived Intangible Assets [Line Items] Finite Lived Intangible Assets [Line Items] Intangible assets Finite Lived Intangible Assets Gross Less accumulated amortization Finite Lived Intangible Assets Accumulated Amortization Total intangible assets, net Write-Off of Fully Amortized Intangible Assets. Removal of fully amortized intangible assets Write Off Of Fully Amortized Intangible Assets Intangible asset amortization period Finite Lived Intangible Asset Useful Life Weighted-average amortization period Weighted-average remaining amortization period Finite Lived Intangible Assets Remaining Amortization Period1 2019 (three months) Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year 2020 Finite Lived Intangible Assets Amortization Expense Year Two 2021 Finite Lived Intangible Assets Amortization Expense Year Three 2022 Finite Lived Intangible Assets Amortization Expense Year Four 2023 Finite Lived Intangible Assets Amortization Expense Year Five Thereafter Finite Lived Intangible Assets Amortization Expense After Year Five Schedule Of Goodwill [Table] Schedule Of Goodwill [Table] Segments Statement Business Segments [Axis] Segments Segment [Domain] Domestic operations. Domestic Domestic Operations [Member] International operations. International International Operations [Member] Goodwill [Roll Forward] Goodwill [Line Items] Goodwill [Roll Forward] Goodwill Roll Forward Balance Goodwill acquired Goodwill Purchase Accounting Adjustments Foreign currency translation Goodwill Foreign Currency Translation Gain Loss Balance Disaggregation Of Revenue [Table] Disaggregation Of Revenue [Table] Contract with Customer, Basis of Pricing Contract With Customer Basis Of Pricing [Axis] Contract with Customer, Basis of Pricing Contract With Customer Basis Of Pricing [Domain] Cost plus fee contract. Cost-plus-fee Cost Plus Fee Contract [Member] Firm fixed-price Fixed Price Contract [Member] Time and materials Time And Materials Contract [Member] Customer Major Customers [Axis] Customer Name Of Major Customer [Domain] Department of defense. Department of Defense Department Of Defense [Member] Federal civilian agencies. Federal civilian agencies Federal Civilian Agencies [Member] Commercial and other. Commercial and other Commercial And Other [Member] Contract with Customer, Sales Channel Contract With Customer Sales Channel [Axis] Contract with Customer, Sales Channel Contract With Customer Sales Channel [Domain] Prime contractor. Prime contractor Prime Contractor [Member] Subcontractor. Subcontractor Subcontractor [Member] Disaggregation Of Revenue [Line Items] Disaggregation Of Revenue [Line Items] Schedule Of Change In Accounting Estimate [Table] Schedule Of Change In Accounting Estimate [Table] Change in Accounting Estimate by Type Change In Accounting Estimate By Type [Axis] Change in Accounting Estimate, Type Change In Accounting Estimate Type [Domain] EAC Adjustments Contracts Accounted For Under Percentage Of Completion [Member] Change In Accounting Estimate [Line Items] Change In Accounting Estimate [Line Items] Income before income taxes Revenue from previously satisfied performance obligations Contract With Customer Performance Obligation Satisfied In Previous Period Remaining performance obligations Revenue Remaining Performance Obligation Remaining performance obligations. Remaining performance obligations. Remaining Performance Obligations [Table] Remaining Performance Obligations [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Start Date [Axis] Remaining Performance Obligations [Line Items] Remaining Performance Obligations [Line Items] Remaining performance obligations, expected satisfaction, percentage Revenue Remaining Performance Obligation Percentage Remaining performance obligations, expected timing of satisfaction Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 Contract with customer, liability, current. Contract with customer, liability, noncurrent. Contract with customer assets (liabilities), net. Contract with Customer, Asset and Liability [Abstract] Contract With Customer Asset And Liability [Abstract] Contract assets – current: Contract With Customer Asset Net Current [Abstract] Unbilled receivables Contract With Customer Asset Net Current Costs to obtain – short-term Capitalized Contract Cost Net Current Contract assets – noncurrent: Contract With Customer Asset Net Noncurrent [Abstract] Unbilled receivables Contract With Customer Asset Net Noncurrent Costs to obtain – long-term Capitalized Contract Cost Net Noncurrent Contract liabilities – current: Contract With Customer Liability Current [Abstract] Deferred revenue Contract With Customer Liability Current Contract liabilities – noncurrent: Contract With Customer Liability Noncurrent [Abstract] Deferred revenue Contract With Customer Liability Noncurrent Net contract assets (liabilities) Contract With Customer Assets Liabilities Net Liability, revenue recognized Contract With Customer Liability Revenue Recognized Transfer of financial assets accounted for as sales. MARPA Facility Term. MARPA Facility maximum commitment. Transfer Of Financial Assets Accounted For As Sales [Table] Transfer Of Financial Assets Accounted For As Sales [Table] Income Statement Location Income Statement Location [Axis] Income Statement Location Income Statement Location [Domain] Interest expense and other net. Interest Expense and Other, Net Interest Expense And Other Net [Member] Transfer Of Financial Assets Accounted For As Sales [Line Items] Transfer Of Financial Assets Accounted For As Sales [Line Items] MARPA Facility Transfer Of Financial Assets Accounted For As Sales [Abstract] MARPA Facility term Transfers Of Financial Assets Accounted For As Sales Marpa Facility Term MARPA Facility maximum commitment Transfers Of Financial Assets Accounted For As Sales Marpa Facility Maximum Commitment Amount outstanding as of the balance sheet date for sales of receivables under the MARPA Facility. Sales of receivables Transfer Of Financial Assets Accounted For As Sales Amount Derecognized Outstanding balance sold to Purchaser Transfer Of Financial Assets Accounted For As Sales Amount Outstanding Cash collected, not remitted to Purchaser Transfers Of Financial Assets Accounted For As Sales Cash Collected Not Remitted To Purchaser Purchase discount fees for the MARPA Facility. Purchase discount fees Transfer Of Financial Assets Accounted For As Sales Purchase Discount Fees Cash collections Transfers Of Financial Assets Accounted For As Sales Cash Collected Outstanding balance sold to Purchaser Cash collected, not remitted to Purchaser Remaining sold receivables Transfer Of Financial Assets Accounted For As Sales Remaining Sold Receivables Debt Instrument [Table] Debt Instrument [Table] Credit Facility Credit Facility [Axis] Credit Facility Credit Facility [Domain] Bank credit facility - term loans Secured Debt [Member] Bank credit facility - revolver loans Revolving Credit Facility [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Principal amount of long-term debt Debt Instrument Carrying Amount Less unamortized discounts and debt issuance costs Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net Total long-term debt Long Term Debt Less current portion Represents bank credit facility. Bank Credit Facility Bank Credit Facility [Member] Revolving Credit Facility Term loans Represent same-day swing line loan sub facility of revolving credit facility. Same-Day Swing Line Loan Revolving Credit Subfacility Same Day Swing Line Loan [Member] Stand-By Letters Of Credit Revolving Credit Subfacility Standby Letters Of Credit [Member] Long-term Debt, Type Longterm Debt Type [Axis] Long-term Debt, Type Longterm Debt Type [Domain] Principal payment through June 30, 2021. Principal Payment Through June 30, 2021 Principal Payment Through June302021 [Member] Principal payment thereafter June 30, 2021. Principal Payment Thereafter June 30, 2021 Principal Payment Thereafter June302021 [Member] Derivative Instrument Derivative Instrument Risk [Axis] Derivative Contract Derivative Contract Type [Domain] Interest Rate Swap Interest Rate Swap [Member] Hedging Relationship Derivative Instruments Gain Loss By Hedging Relationship [Axis] Hedging Relationship Hedging Relationship [Domain] Cash Flow Hedging Cash Flow Hedging [Member] Credit facility maximum borrowing capacity Line Of Credit Facility Maximum Borrowing Capacity Outstanding amount under Credit Facility Term loan period Debt Instrument Term Loan maturity date Line Of Credit Facility Expiration Date1 Term loan frequency of payment Line Of Credit Facility Frequency Of Payments Term loan principal payment Line Of Credit Facility Periodic Payment Principal Outstanding borrowings interest rate Debt Instrument Interest Rate Effective Percentage Aggregate notional amount Derivative Notional Amount Gain (loss) recognized in other comprehensive income Other Comprehensive Income Loss Before Reclassifications Net Of Tax Amounts reclassified to earnings from accumulated other comprehensive loss Derivative Instruments Gain Loss Reclassified From Accumulated O C I Into Income Effective Portion Net Net current period other comprehensive income 2020 Long Term Debt Maturities Repayments Of Principal In Next Rolling Twelve Months 2021 Long Term Debt Maturities Repayments Of Principal In Rolling Year Two 2022 Long Term Debt Maturities Repayments Of Principal In Rolling Year Three 2023 Long Term Debt Maturities Repayments Of Principal In Rolling Year Four 2024 Long Term Debt Maturities Repayments Of Principal In Rolling Year Five Principal amount of long-term debt Share Based Compensation Allocation And Classification In Financial Statements [Abstract] Stock-based compensation included in indirect costs and selling expense: Share Based Compensation [Abstract] Stock-based compensation related to RSUs included in indirect costs and selling expense Allocated Share Based Compensation Expense Income tax benefit recognized for stock-based compensation expense Employee Service Share Based Compensation Tax Benefit From Compensation Expense Period in which equity awards can be granted under stock incentive plan. Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Plan Name Plan Name [Axis] Plan Name Plan Name [Domain] Information about 2006 Stock Incentive. 2006 Plan Two Thousand Six Stock Incentive Plan [Member] Award Type Award Type [Axis] Equity Award Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Represents information about performance-based restricted stock units. PRSUs Performance Based Restricted Stock Units [Member] Two thousand sixteen incentive compensation plan. 2016 Plan Two Thousand Sixteen Incentive Compensation Plan [Member] RSUs Restricted Stock Units R S U [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Stock incentive plan, expiration period Stock Incentive Plan Expiration Period Represents information about average share price determination period. Average share price performance condition, percentage by which the average share price of the Company’s stock in years one, two and three exceeds the average share price at the grant date. Maximum earned award percentage of target award. Service vesting condition which stipulates that 50 percent of the earned award will vest after three years. Service vesting condition which stipulates that 50 percent of the earned award will vest after four years. Period to establish average share price for performance measurement Average Share Price Determination Period Average share price performance condition, percentage Average Share Price Performance Condition Percentage Maximum earned award, percentage of target award Maximum Earned Award Percentage Of Target Percentage of earned award vesting after three years Percentage Of Earned Award Vesting After Three Years Percentage of earned award vesting after four years Percentage Of Earned Award Vesting After Four Years Represents the number of additional PRSUs earned pursuant to condition. Fiscal year two thousand nineteen, performance-based restricted stock units. FY2019 PRSUs Fiscal Year Two Thousand Nineteen Performance Based Restricted Stock Units [Member] Fiscal year two thousand eighteen, performance-based restricted stock units. FY2018 PRSUs Fiscal Year Two Thousand Eighteen Performance Based Restricted Stock Units [Member] Fiscal year two thousand seventeen, performance-based restricted stock units. FY2017 PRSUs Fiscal Year Two Thousand Seventeen Performance Based Restricted Stock Units [Member] PRSUs granted Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Additional PRSUs earned pursuant to condition Additional Performance Based Restricted Stock Units Earned Pursuant To Condition Cumulative equity instruments awarded. Cumulative equity instruments forfeited. Number of shares authorized for grants Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized Cumulative equity instruments awarded Cumulative Equity Instruments Awarded Cumulative equity instruments forfeited Cumulative Equity Instruments Forfeited Unvested at June 30, 2018 Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number Granted Vested Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Forfeited Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period Unvested at March 31, 2019 Weighted-average grant date fair value for RSUs Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value Unrecognized compensation cost Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Weighted-average period to recognize unrecognized compensation cost (in years) Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 Weighted-average number of basic shares outstanding during the period Dilutive effect of RSUs after application of treasury stock method Incremental Common Shares Attributable To Share Based Payment Arrangements Weighted-average number of diluted shares outstanding during the period Liability for unrecognized tax benefits Unrecognized Tax Benefits Unrecognized tax benefit that would impact the company's effective tax rate Unrecognized Tax Benefits That Would Impact Effective Tax Rate Effective tax rate, percentage Effective Income Tax Rate Continuing Operations Statutory U.S. Income Tax Rate Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate Tax cuts and jobs act, one time transition tax measurement period adjustment to income tax expense benefit. Tax cuts and jobs act, measurement period adjustment to income tax expense. TCJA one-time transition tax, measurement period adjustment to income tax expense Tax Cuts And Jobs Act Of2017 One Time Transition Tax Measurement Period Adjustment To Income Tax Expense Benefit TCJA reameasurement of deferred taxes, measurement period adjustment to income tax expense Tax Cuts And Jobs Act Of2017 Remeasurement Of Deferred Taxes Measurement Period Adjustment To Income Tax Expense Benefit Number of reportable segments Number Of Reportable Segments Schedule Of Segment Reporting Information By Segment [Table] Schedule Of Segment Reporting Information By Segment [Table] Domestic Operations International Operations Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Revenue from external customers Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Measurement Frequency Fair Value By Measurement Frequency [Axis] Fair Value, Measurement Frequency Fair Value Measurement Frequency [Domain] Fair Value, Measurements, Recurring Fair Value Measurements Recurring [Member] Balance Sheet Location Balance Sheet Location [Axis] Balance Sheet Location Balance Sheet Location [Domain] Other accrued expenses and current liabilities. Other accrued expenses and current liabilities Other Accrued Expenses And Current Liabilities [Member] Other long-term liabilities Other Noncurrent Liabilities [Member] Prepaid expenses and other current assets Prepaid Expenses And Other Current Assets [Member] Other long-term assets Other Noncurrent Assets [Member] Fair Value Hierarchy and NAV Fair Value By Fair Value Hierarchy Level [Axis] Fair Value Hierarchy and NAV Fair Value Measurements Fair Value Hierarchy [Domain] Level 3 Fair Value Inputs Level3 [Member] Level 2 Fair Value Inputs Level2 [Member] Financial Instrument Financial Instrument [Axis] Financial Instruments Transfers And Servicing Of Financial Instruments Types Of Financial Instruments [Domain] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] Contingent consideration Business Combination Contingent Consideration Liability Interest rate swap agreements Derivative Assets Represents business combination contingent consideration period for achieving earnings targets. Business combination contingent consideration period Business Combination Contingent Consideration Period Change in fair value of contingent consideration Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Period Increase Decrease Number of interest rate swaps. Effective date of interest rate swaps. Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type Subsequent Event Type [Axis] Subsequent Event Type Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Number of interest rate swaps Number Of Floating To Fixed Interest Rate Swaps Effective date of interest rate swaps Interest Rate Swap Agreements Effective Date