Booz Allen Hamilton Holding (BAH) 10-Q 7 Aug 17 2018 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Jun. 30, 2017	Aug. 02, 2017
Document and Entity Information [Abstract]
Entity Registrant Name	Booz Allen Hamilton Holding Corp
Entity Central Index Key	1,443,646
Document Type	10-Q
Document Period End Date	Jun. 30, 2017
Amendment Flag	false
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--03-31
Entity Filer Category	Large Accelerated Filer
Common stock, Class A
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding		148,676,105
Non-voting common stock, Class B
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding		0
Restricted common stock, Class C
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding		0
Special voting common stock, Class E
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding		0

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017
Current assets:
Cash and cash equivalents	$ 337,487	$ 217,417
Accounts receivable, net of allowance	1,073,968	991,810
Prepaid expenses and other current assets	95,521	85,253
Total current assets	1,506,976	1,294,480
Property and equipment, net of accumulated depreciation	138,912	139,167
Intangible assets, net of accumulated amortization	267,893	271,880
Goodwill	1,571,186	1,571,190
Other long-term assets	90,558	96,388
Total assets	3,575,525	3,373,105
Current liabilities:
Current portion of long-term debt	63,150	193,150
Accounts payable and other accrued expenses	508,430	504,117
Accrued compensation and benefits	227,036	263,816
Other current liabilities	146,651	140,318
Total current liabilities	945,267	1,101,401
Long-term debt, net of current portion	1,798,655	1,470,174
Other long-term liabilities	232,576	227,939
Total liabilities	2,976,498	2,799,514
Commitments and contingencies (Note 18)
Stockholders’ equity:
Treasury stock, at cost — 8,124,611 shares at June 30, 2017 and 7,013,777 shares at March 31, 2017	(230,421)	(191,900)
Additional paid-in capital	312,874	302,907
Retained earnings	532,230	478,102
Accumulated other comprehensive loss	(17,224)	(17,077)
Total stockholders’ equity	599,027	573,591
Total liabilities and stockholders’ equity	3,575,525	3,373,105
Common stock, Class A
Stockholders’ equity:
Common stock	$ 1,568	$ 1,559

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2017	Mar. 31, 2017
Treasury stock, shares	8,124,611	7,013,777
Common stock, Class A
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	600,000,000	600,000,000
Common stock, shares issued	156,800,716	155,901,485
Common stock, shares outstanding	148,676,105	148,887,708

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Revenue	$ 1,493,570	$ 1,422,722
Operating costs and expenses:
Cost of revenue	698,538	656,954
Billable expenses	451,664	432,265
General and administrative expenses	188,455	189,701
Depreciation and amortization	15,449	14,501
Total operating costs and expenses	1,354,106	1,293,421
Operating income	139,464	129,301
Interest expense	(18,747)	(17,828)
Other income (expense), net	761	1,891
Income before income taxes	121,478	113,364
Income tax expense	41,938	45,547
Net income	$ 79,540	$ 67,817
Earnings per common share (Note 3):
Basic (in dollars per share)	$ 0.53	$ 0.46
Diluted (in dollars per share)	0.53	0.45
Dividends declared per share	$ 0.17	$ 0.15

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 79,540	$ 67,817
Unrealized loss on derivatives designated as cash flow hedges	(510)	0
Change in postretirement plan costs	363	457
Total other comprehensive (loss) income, net of tax	(147)	457
Comprehensive income	$ 79,393	$ 68,274

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities
Net income	$ 79,540	$ 67,817
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	15,449	14,501
Stock-based compensation expense	5,249	5,889
Excess tax benefits from stock-based compensation	(6,864)	(3,546)
Amortization of debt issuance costs	1,289	2,083
Losses on dispositions	174	3
Changes in assets and liabilities:
Accounts receivable	(82,158)	(60,508)
Prepaid expenses and other current assets	(3,249)	36,206
Other long-term assets	5,504	(15,980)
Accrued compensation and benefits	(36,203)	(34,533)
Accounts payable and other accrued expenses	1,832	(20,776)
Accrued interest	4,698	1,658
Other current liabilities	14,487	13,195
Other long-term liabilities	4,247	5,638
Net cash provided by operating activities	3,995	11,647
Cash flows from investing activities
Purchases of property and equipment	(11,536)	(6,171)
Cash paid for business acquisitions, net of cash acquired	(204)	(851)
Net cash used in investing activities	(11,740)	(7,022)
Cash flows from financing activities
Proceeds from issuance of common stock	1,779	1,571
Stock option exercises	3,263	2,338
Excess tax benefits from stock-based compensation	0	3,546
Repurchases of common stock	(48,428)	(4,566)
Cash dividends paid	25,412	22,349
Dividend equivalents paid to option holders	(890)	(2,157)
Repayment of debt	(175,788)	(175,563)
Proceeds from debt issuance	373,291	185,000
Net cash provided by (used in) financing activities	127,815	(12,180)
Net increase (decrease) in cash and cash equivalents	120,070	(7,555)
Cash and cash equivalents-beginning of period	217,417	187,529
Cash and cash equivalents-end of period	337,487	179,974
Cash paid during the period for:
Interest	12,652	14,051
Income taxes	$ 17,016	$ 1,490

Business Overview

Business Overview	3 Months Ended
	Jun. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BUSINESS OVERVIEW	BUSINESS OVERVIEW Organization Booz Allen Hamilton Holding Corporation, including its wholly owned subsidiaries, or Holding, the Company or we, us, and our, was incorporated in Delaware in May 2008. The Company provides management and technology consulting, engineering, analytics, digital solutions, mission operations, and cyber expertise to U.S. and international governments, major corporations, and not-for-profit organizations. The Company reports operating results and financial data in one reportable segment. The Company is headquartered in McLean, Virginia, with approximately 23,400 employees as of June 30, 2017 .

Basis of Presentation

Basis of Presentation	3 Months Ended
	Jun. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BASIS OF PRESENTATION	BASIS OF PRESENTATION The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles, or GAAP, and pursuant to the rules and regulations of the U.S. Securities and Exchange Commission, or SEC, and should be read in conjunction with the information contained in the Company's Annual Report on Form 10-K for the year ended March 31, 2017. The interim period unaudited condensed consolidated financial statements are presented as described below. Certain information and disclosures normally required for annual financial statements have been condensed or omitted pursuant to GAAP and SEC rules and regulations. In the opinion of management, all adjustments considered necessary for fair presentation of the results of the interim period presented have been included. The Company’s fiscal year ends on March 31 and unless otherwise noted, references to fiscal year or fiscal are for fiscal years ended March 31. The results of operations for the three months ended June 30, 2017 are not necessarily indicative of results to be expected for the full fiscal year. The condensed consolidated financial statements and notes of the Company include its subsidiaries, and the joint ventures and partnerships over which the Company has a controlling financial interest. The Company uses the equity method to account for investments in entities that it does not control if it is otherwise able to exert significant influence over the entities' operating and financial policies. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expenses during the reporting periods. Areas of the financial statements where estimates may have the most significant effect include contractual and regulatory reserves, valuation and lives of tangible and intangible assets, contingent consideration related to business acquisitions, impairment of long-lived assets, accrued liabilities, revenue recognition and costs to complete fixed-price contracts, bonus and other incentive compensation, stock-based compensation, reserves for tax benefits and valuation allowances on deferred tax assets, provisions for income taxes, postretirement obligations, certain deferred costs, collectability of receivables, and loss accruals for litigation. Actual results experienced by the Company may differ materially from management's estimates. Recent Accounting Pronouncements In March 2016, the Financial Accounting Standards Board, or FASB, issued Accounting Standards Update, or ASU, 2016-09, Improvements to Employee Share-Based Payment Accounting , which simplifies several aspects of the accounting for share-based payment award transactions related to accounting for income taxes, forfeitures, statutory tax withholding requirements, classification of awards as either equity or liabilities, and classification of employee taxes paid on the statements of cash flows when an employer withholds shares for tax-withholding purposes. The Company adopted ASU 2016-09 in the current period. Certain of the simplification provisions were not applicable to the Company. The Company will continue its existing practice of estimating the number of forfeitures that are expected to occur rather than account for forfeitures when they occur as permitted under the new guidance. The primary impacts of adopting ASU 2016-09 were those related to excess tax benefits and tax deficiencies. The new guidance requires that such amounts be recognized as income tax expense or benefit in the statement of operations, which could result in fluctuations in the Company's effective tax rate period over period depending on how many awards vest, or options are exercised, in a quarter. The guidance also requires that the cash flows associated with these transactions be presented with other income tax related cash flows in the operating activities section of the statement of cash flows. The Company recognized excess tax benefits of $6.9 million during the quarter ended June 30, 2017, as a reduction to income tax expense in the condensed consolidated statement of operations. As discussed further in Note 10, the effect of adopting ASU 2016-09 resulted in a decrease in the Company's current period effective tax rate. As permitted, the Company adopted the guidance related to the presentation of excess tax benefits in the condensed consolidated statement of cash flows on a prospective basis. Prior period amounts were not adjusted. In March 2017, the FASB issued ASU 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost , which will change the presentation of net periodic benefit cost components on the condensed consolidated statement of operations. Under this guidance, the service cost component of net benefit cost will continue to be presented in the same line items as other employee compensation costs, while the remaining components of net periodic benefit costs are to be presented outside operating income. ASU 2017-07 is effective for annual reporting periods beginning after December 15, 2017 and is to be applied retrospectively, with early adoption permitted. The Company is assessing the effect that the adoption of this guidance will have on its condensed consolidated financial statements. In February 2016, the FASB issued ASU 2016-02, Leases , to increase transparency and comparability of accounting for lease transactions. The new standard requires lessees to recognize lease assets and lease liabilities on their balance sheet for all leases with a lease term of greater than 12 months. Lessor accounting is largely unchanged. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, with early adoption permitted. The Company is assessing what effect the adoption of this standard may have on its condensed consolidated financial statements. In May 2014, the FASB, issued Accounting Standard Codification, or ASC, topic, Revenue from Contracts with Customers , as amended (Topic 606) that will replace existing revenue recognition standards and significantly expand the disclosure requirements for revenue arrangements. In July 2015, the FASB approved a one-year delay in the effective date of the standard, which will now be effective for the Company beginning on April 1, 2018 (i.e., beginning with the first quarter fiscal 2019 interim financial statements). The Company anticipates adopting the new revenue standard using the full retrospective transition method; however, the Company's ability to adopt using the full retrospective method is dependent on system and process readiness and the completion of our analysis of information necessary to recast our prior period financial statements. A dedicated team has been established that continues to make progress toward completing the evaluation of the impact of the new standard. An initial accounting assessment of the new standard has been completed and the Company is not currently expecting significant changes related to recognizing revenue and earnings over time for long-term contracts as work progresses because of the continuous transfer of control to the customer, generally using an input measure (e.g., costs incurred) to reflect progress. Nevertheless, the Company expects the standard will result in several changes to the way it recognizes revenue, including how the Company determines the transaction price for performance-based or unfunded components associated with our fixed price contracts, the period of time for recognizing revenue primarily in non-federal government contracts, and with certain types of option exercises that may be evaluated as separate performance obligations or new arrangements for accounting purposes. The Company is continuing the process of quantifying the financial statement impacts, revising current accounting policies, evaluating changes to internal controls, and determining the appropriate changes to business processes. Other accounting and reporting pronouncements issued after June 30, 2017 are not expected to have a material impact on the Company's condensed consolidated financial statements.

Earnings Per Share

Earnings Per Share	3 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
EARNINGS PER SHARE	EARNINGS PER SHARE The Company computes basic and diluted earnings per share amounts based on net income for the periods presented. The Company uses the weighted average number of common shares outstanding during the period to calculate basic earnings per share, or EPS. Diluted EPS adjusts the weighted average number of shares outstanding to include the dilutive effect of outstanding common stock options and other stock-based awards. The Company currently has outstanding shares of Class A Common Stock. Unvested Class A Restricted Common Stock holders are entitled to participate in non-forfeitable dividends or other distributions. These unvested restricted shares participated in the Company's dividends declared and were paid in the first quarter of fiscal 2018 and 2017 . As such, EPS is calculated using the two-class method whereby earnings are reduced by distributed earnings as well as any available undistributed earnings allocable to holders of unvested restricted shares. A reconciliation of the income used to compute basic and diluted EPS for the periods presented are as follows: Three Months Ended 2017 2016 Earnings for basic computations (1) $ 78,955 $ 67,247 Weighted-average common shares outstanding for basic computations 147,714,993 147,241,782 Earnings for diluted computations (1) $ 78,961 $ 67,254 Dilutive stock options and restricted stock 2,153,280 2,392,810 Weighted-average common shares outstanding for diluted computations 149,868,273 149,634,592 Earnings per common share Basic $ 0.53 $ 0.46 Diluted $ 0.53 $ 0.45 (1) During the three months ended June 30, 2017 and 2016 , approximately 1.1 million and 1.2 million participating securities were paid dividends totaling $0.2 million and $0.2 million , respectively. For both the three months ended June 30, 2017 and 2016 , there were undistributed earnings of $0.4 million allocated to the participating class of securities in both basic and diluted EPS. The allocated undistributed earnings and the dividends paid comprise the difference between net income presented on the condensed consolidated statements of operations and earnings for basic and diluted computations for the three months ended June 30, 2017 and 2016 . The EPS calculation for three months ended June 30, 2017 and 2016 excludes 0.2 million and 0.5 million options, respectively, as their impact was anti-dilutive.

Acquisitions Acquisitions

Acquisitions Acquisitions	3 Months Ended
	Jun. 30, 2017
Business Combinations [Abstract]
Acquisitions	ACQUISITION On January 24, 2017, the Company acquired eGov Holdings, Inc., which we refer to as "Aquilent". As a result of the transaction, eGov Holdings, Inc. became a wholly owned subsidiary of Booz Allen Hamilton Inc., or Booz Allen Hamilton. Aquilent is an architect of IT solutions for the U.S. federal government. We expect the acquisition will further expand the Company's ability to blend its consulting heritage with advanced technical expertise. The acquisition of Aquilent has been accounted for under the acquisition method of accounting, which requires the total acquisition consideration to be allocated to the assets acquired and liabilities assumed based on an estimate of the acquisition date fair value, with the difference reflected in goodwill. During the first quarter of fiscal 2018, the Company finalized Aquilent's post-closing working capital, which resulted in an immaterial adjustment to the total estimated purchase consideration transferred. The following table summarizes the preliminary determination of the total consideration transferred as of June 30, 2017, reflecting such adjustment: Cash purchase price paid to Aquilent shareholders $ 250,000 Working capital and other closing adjustments (1,729 ) Acquired cash on hand 2,998 Acquisition-related compensation expenses (1,291 ) Acquisition-related contingent consideration 3,576 Total estimated purchase consideration transferred at closing $ 253,554 As part of the acquisition, the Company and the selling shareholders of Aquilent agreed to jointly make an election under Section 338(h)(10) of the Internal Revenue Code of 1986, as amended, or the Code, to treat the acquisition as an asset purchase for income tax purposes. The Company agreed to contractually reimburse the selling stockholders for previously unrealized tax consequences on Aquilent's prior tax-return positions that became realized upon acquisition; and agreed to indemnify the selling stockholders for potential, incremental increases in income taxes and related costs as a result of the Section 338(h)(10) election. The indemnity was evaluated to be acquisition-related contingent consideration, which was preliminarily estimated at the acquisition date fair value of $3.6 million . The acquisition-related contingent consideration was estimated using probability-weighted cash flows and significant unobservable inputs (Level 3) as described under the fair value hierarchy of ASC 820, Fair Value Measurements, or ASC 820. The Company recorded, on a preliminary basis, the assets acquired and liabilities assumed at their acquisition date fair value, with the difference between the fair value of the net assets acquired and the acquisition consideration reflected as goodwill. The following table represents the preliminary fair value of assets acquired and liabilities assumed as of the acquisition date: Preliminary allocation: Current assets $ 15,809 Other tangible assets 1,144 Customer-relationship intangible assets 69,000 Goodwill 199,826 Current liabilities (8,450 ) Tax liability (13,554 ) Income tax uncertainty (10,221 ) Total purchase consideration transfer at closing $ 253,554 The identifiable customer-relationship intangible assets of $69 million were valued using the excess earnings method discounted cash flow approach, incorporating Level 3 inputs as described under the fair value hierarchy of ASC 820. These unobservable inputs reflect the Company's own assumptions about which assumptions market participants would use in pricing an asset on a non-recurring basis. This asset will be amortized over the estimated useful life of 12 years. As part of the acquisition, the Company agreed to contractually reimburse the selling stockholders for previously unrealized tax consequences on Aquilent's prior tax-return positions that become realized with the acquisition. Accordingly, the Company recognized a tax liability of $13.6 million . The obligation was relieved and paid during the first quarter of fiscal 2018. The Company continues to carry a related reserve of $10.2 million for income tax uncertainties created with the acquisition resulting from uncertainty in the sustainability of Aquilent's prior tax-return positions under examination with the relevant tax authorities. The goodwill of $199.8 million was primarily attributed to the specialized workforce and the expected synergies between the Company and Aquilent. The majority of the goodwill is expected to be deductible for tax purposes. The fair values of assets acquired and liabilities assumed are preliminary and based on valuation estimates and assumptions that are subject to change and could result in material changes since the timing of the acquisition and related judgments required to make certain valuation estimates could necessitate the use of the one year measurement period to adequately analyze and assess a number of factors used in establishing the fair value of the net assets acquired. Although the Company does not currently expect material changes to the initial value of net assets acquired, the Company continues to evaluate assumptions associated with the customer-relationship intangibles and assumptions underlying income tax uncertainty.

Accounts Receivable, Net

Accounts Receivable, Net	3 Months Ended
	Jun. 30, 2017
Receivables [Abstract]
ACCOUNTS RECEIVABLE, NET	ACCOUNTS RECEIVABLE, NET OF ALLOWANCE Accounts receivable, net consisted of the following: June 30, March 31, Current Accounts receivable–billed $ 442,028 $ 340,716 Accounts receivable–unbilled 632,809 651,094 Allowance for doubtful accounts (869 ) — Accounts receivable, net of allowance 1,073,968 991,810 Long-term Accounts receivable–unbilled 60,201 59,913 Total accounts receivable, net $ 1,134,169 $ 1,051,723 Unbilled amounts represent revenues for which billings have not been presented to customers at quarter-end or year-end. These amounts are usually billed and collected within one year. Long-term unbilled receivables not anticipated to be billed and collected within one year, which are primarily related to retainage, holdbacks, and long-term rate settlements to be billed at contract closeout, are included in other long-term assets in the accompanying condensed consolidated balance sheets. The Company recognized a provision for doubtful accounts (including certain unbilled reserves) of $0.8 million and $0.7 million for the three months ended June 30, 2017 and 2016 , respectively. The primary financial instruments, other than derivatives, that potentially subject the Company to concentrations of credit risk are accounts receivable. The Company's primary customers are U.S. federal government agencies and prime contractors under contracts with the U.S. government. The Company continuously reviews its accounts receivable and records provisions for doubtful accounts as needed.

Accounts Payable and Other Accr

Accounts Payable and Other Accrued Expenses	3 Months Ended
	Jun. 30, 2017
Payables and Accruals [Abstract]
ACCOUNTS PAYABLE AND OTHER ACCRUED EXPENSES	ACCOUNTS PAYABLE AND OTHER ACCRUED EXPENSES Accounts payable and other accrued expenses consisted of the following: June 30, March 31, Vendor payables $ 269,853 $ 268,630 Accrued expenses 238,577 235,487 Total accounts payable and other accrued expenses $ 508,430 $ 504,117 Accrued expenses consisted primarily of the Company’s reserve related to potential cost disallowance in conjunction with government audits. Refer to Note 18 for further discussion of this reserve.

Accrued Compensation and Benefi

Accrued Compensation and Benefits	3 Months Ended
	Jun. 30, 2017
Compensation Related Costs [Abstract]
ACCRUED COMPENSATION AND BENEFITS	ACCRUED COMPENSATION AND BENEFITS Accrued compensation and benefits consisted of the following: June 30, March 31, Bonus $ 20,790 $ 77,765 Retirement 47,405 31,879 Vacation 129,289 124,486 Other 29,552 29,686 Total accrued compensation and benefits $ 227,036 $ 263,816

Debt

Debt	3 Months Ended
	Jun. 30, 2017
Debt Disclosure [Abstract]
DEBT	DEBT Debt consisted of the following: June 30, 2017 March 31, 2017 Interest Rate Outstanding Balance Interest Rate Outstanding Balance Term Loan A 3.22 % $ 1,138,638 2.98 % $ 1,153,425 Term Loan B 3.34 % 397,000 3.08 % 398,000 Revolving Credit Facility (ABR) — % — 5.00 % 80,000 Revolving Credit Facility (LIBOR) — % — 2.98 % 50,000 Senior Notes 5.13 % 350,000 — % — Less: Unamortized debt issuance costs and discount on debt (23,833 ) (18,101 ) Total 1,861,805 1,663,324 Less: Current portion of long-term debt (63,150 ) (193,150 ) Long-term debt, net of current portion $ 1,798,655 $ 1,470,174 Term Loans and Revolving Credit Facility On February 6, 2017, Booz Allen Hamilton, Booz Allen Hamilton Investor Corporation, or Investor, and certain wholly-owned subsidiaries of Booz Allen Hamilton entered into the Fourth Amendment, or the Fourth Amendment, to the Credit Agreement, or the Credit Agreement, dated as of July 31, 2012, among Booz Allen Hamilton, Investor, certain wholly owned subsidiaries of Booz Allen Hamilton and Bank of America, N.A., as Administrative Agent, Collateral Agent and Issuing Lender (as previously amended by the First Amendment to the Credit Agreement, dated as of August 16, 2013, the Second Amendment to the Credit Agreement, dated as of May 7, 2014, and the Third Amendment to the Credit Agreement, dated as of July 13, 2016). Pursuant to the Fourth Amendment, the Company reduced the interest rate spread applicable to Term Loan B. The interest rate spread applicable to Term Loan A remained unchanged. As of June 30, 2017 , the Credit Agreement, as amended, provided the Company with a $1,138.6 million Term Loan A ("Term Loan A"), a $397.0 million Term Loan B ("Term Loan B" and, together with Term Loan A, the "Term Loans"), and a $500.0 million revolving credit facility (the “Revolving Credit Facility", and together with the Term Loans, the "Secured Credit Facility”), with a sublimit for letters of credit of $100.0 million . As of June 30, 2017 , the maturity date of Term Loan A and the termination date for the Revolving Credit Facility was June 30, 2021 and the maturity date of Term Loan B was June 30, 2023. Booz Allen Hamilton’s obligations and the guarantors’ guarantees under the Credit Agreement, as amended, are secured by a first priority lien on substantially all of the assets (including capital stock of subsidiaries) of Booz Allen Hamilton, Investor, and the subsidiary guarantors, subject to certain exceptions set forth in the Credit Agreement, as amended, and related documentation. Subject to specified conditions, without the consent of the then-existing lenders (but subject to the receipt of commitments), the Term Loans or Revolving Credit Facility may be expanded (or a new term loan facility or revolving credit facility added to the existing facilities) by up to (i) $400 million plus (ii) the aggregate principal amount under which pro forma consolidated net secured leverage remains less than or equal to 3.50 :1.00. At Booz Allen Hamilton’s option, borrowings under the Secured Credit Facility bear interest based either on LIBOR (adjusted for maximum reserves, and subject to a floor of zero ) for the applicable interest period or a base rate (equal to the highest of (x) the administrative agent’s prime corporate rate, (y) the overnight federal funds rate plus 0.50% , and (z) three-month LIBOR (adjusted for maximum reserves, and subject to a floor of zero ) plus 1.00% ), in each case plus an applicable margin, payable at the end of the applicable interest period and in any event at least quarterly. The applicable margin for Term Loan B is 2.25% for LIBOR loans and 1.25% for base rate loans. The applicable margin for Term Loan A and borrowings under the Revolving Credit Facility ranges from 1.50% to 2.25% for LIBOR loans and 0.50% to 1.25% for base rate loans, in each case based on Booz Allen Hamilton’s consolidated total net leverage ratio. Unused commitments under the Revolving Credit Facility are subject to a quarterly fee ranging from 0.30% to 0.40% based on Booz Allen Hamilton’s consolidated total net leverage ratio. Booz Allen Hamilton occasionally borrows under the Revolving Credit Facility in anticipation of cash demands. During the first quarter of fiscal 2018 , Booz Allen Hamilton accessed a total of $30.0 million of the $500.0 million Revolving Credit Facility. As of June 30, 2017 , there were no amounts outstanding under the Revolving Credit Facility. As of March 31, 2017 , there was $130.0 million outstanding under the Revolving Credit Facility. The Credit Agreement, as amended, requires quarterly principal payments of 1.25% of the stated principal amount of Term Loan A until maturity, and quarterly principal payments of 0.25% of the stated principal amount of Term Loan B until maturity. The Credit Agreement, as amended, contains customary representations and warranties and customary affirmative and negative covenants. The negative covenants include limitations on the following, in each case subject to certain exceptions: (i) indebtedness and liens, (ii) mergers, consolidations or amalgamations, liquidations, wind-ups or dissolutions, and disposition of all or substantially all assets; (iii) dispositions of property; (iv) restricted payments; (v) investments; (vi) transactions with affiliates; (vii) sale and lease back transactions; (viii) change in fiscal periods; (ix) negative pledges; (x) restrictive agreements; (xi) line of business; and (xii) speculative hedging. The events of default include the following, in each case subject to certain exceptions: (a) failure to make required payments under the Secured Credit Facility; (b) material breaches of representations or warranties under the Secured Credit Facility; (c) failure to observe covenants or agreements under the Secured Credit Facility; (d) failure to pay or default under certain other material indebtedness; (e) bankruptcy or insolvency; (f) certain ERISA events; (g) certain material judgments; (h) actual or asserted invalidity of the Guarantee and Collateral Agreements or the other security documents or failure of the guarantees or perfected liens thereunder; and (i) a change of control. In addition, Booz Allen Hamilton is required to meet certain financial covenants at each quarter end, namely Consolidated Net Total Leverage and Consolidated Net Interest Coverage Ratios. Senior Notes On April 25, 2017, Booz Allen Hamilton issued $350 million aggregate principal amount of its 5.125% Senior Notes, or the Senior Notes, under an Indenture, dated as of April 25, 2017, among Booz Allen Hamilton, certain subsidiaries of Booz Allen Hamilton, as guarantors, or the Subsidiary Guarantors, and Wilmington Trust, National Association, as trustee, or the Trustee, as supplemented by the First Supplemental Indenture, dated as of April 25, 2017, among Booz Allen Hamilton, the Subsidiary Guarantors and the Trustee. Each of Booz Allen Hamilton's existing and future domestic restricted subsidiaries that guarantee its obligations under the Secured Credit Facility and certain other indebtedness will guarantee the Senior Notes on a senior unsecured basis. Interest is payable semi-annually on May 1 and November 1 of each year, beginning on November 1, 2017, and principal is due at maturity on May 1, 2025. In connection with the Senior Notes, the Company recognized $6.7 million of issuance costs, which were recorded as an offset against the carrying value of debt and will be amortized to interest expense over the term of the Senior Notes. As of June 30, 2017 and March 31, 2017 , Booz Allen Hamilton was in compliance with all financial covenants associated with its debt and debt-like instruments. Interest on debt and debt-like instruments consisted of the following: Three Months Ended 2017 2016 (In thousands) Term Loan A Interest Expense $ 8,777 $ 5,506 Term Loan B Interest Expense 3,273 7,974 Interest on Revolving Credit Facility — 230 Senior Notes Interest Expense 3,289 — Deferred Payment Obligation Interest (1) 2,011 2,000 Amortization of Debt Issuance Cost (DIC) and Original Issue Discount (OID) (2) 1,289 2,083 Other 108 35 Total Interest Expense $ 18,747 $ 17,828 (1) Interest payments on the deferred payment obligation are made twice a year in January and July. (2) DIC and OID on the Term Loans and Senior Notes are recorded as a reduction of long term debt in the condensed consolidated balance sheet and are amortized ratably over the life of the related debt using the effective rate method. DIC on the Revolving Credit Facility is recorded as a long term asset on the consolidated balance sheet and amortized ratably over the term of the Revolving Credit Facility.

Derivatives

Derivatives	3 Months Ended
	Jun. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives	DERIVATIVES The Company utilizes derivative financial instruments to manage interest rate risk related to its variable rate term loans. The Company’s objectives in using these interest rate derivatives, which were designated as cash flow hedges, are to manage its exposure to interest rate movements and reduce volatility to interest expense. During the first quarter of fiscal 2018, the Company entered into several forward starting floating-to-fixed interest rate swap agreements with multiple financial institutions with a start date of April 30, 2018. The aggregate notional amount of these interest rate swap agreements was $450 million as of June 30, 2017 . The swaps have staggered maturities, ranging from June 30, 2021 to June 30, 2022. These swaps mature within the last tranche of the Company's floating rate debt (June 30, 2023). The floating-to-fixed interest rate swaps involve the exchange of variable interest amounts from a counterparty for the Company making fixed-rate interest payments over the life of the agreements without exchange of the underlying notional amount and effectively converting a portion of the variable rate debt into fixed interest rate debt. Derivative instruments are recorded in the condensed consolidated balance sheet at estimated fair value. As of June 30, 2017 , $0.3 million , $0.3 million and $0.8 million , were classified as other long term assets, other current liabilities, and other long term liabilities, respectively, on the condensed consolidated balance sheet. For interest rate swaps designated as cash flow hedges, the effective portion of changes in the fair value of derivatives is recorded in Accumulated Other Comprehensive Income, or AOCI, net of taxes, and is subsequently reclassified into interest expense in the period that the hedged forecasted interest payments are made on the Company's variable-rate debt. As of June 30, 2017, a $0.8 million loss has been recognized in AOCI, and there were no amounts reclassified into interest expense. The ineffective portion of the change in fair value of the derivatives is recognized directly in earnings. During the first quarter of fiscal 2018, there was no ineffectiveness recognized in earnings. Over the next 12 months, the Company estimates that $0.4 million will be reclassified as an increase to interest expense. Cash flows associated with periodic settlements of interest rate swaps will be classified as operating activities in the condensed consolidated statement of cash flows. The Company is subject to counterparty risk in connection with its interest rate swap derivative contracts. Credit risk related to a derivative financial instrument represents the possibility that the counterparty will not fulfill the terms of the contract. The Company mitigates this credit risk by entering into agreements with credit-worthy counterparties and regularly reviews its credit exposure and the creditworthiness of the counterparties.

Income Taxes

Income Taxes	3 Months Ended
	Jun. 30, 2017
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES The Company’s effective income tax rate was 34.5% and 40.2% for the three months ended June 30, 2017 and 2016 , respectively. The decrease in the effective tax rate for the three months ended June 30, 2017 as compared to the same period last fiscal year was primarily due to the Company's adoption of ASU 2016-09 in the first quarter of fiscal 2018 as discussed in Note 2. As a result, the Company recorded excess tax benefits related to employee share-based payment awards within income tax (benefit) expense as a discrete item during the reporting period in which they occurred, instead of recording those benefits as adjustments to additional paid-in-capital. The Company recognized excess tax benefits of $6.9 million in the first quarter of fiscal 2018. The three months effective tax rates of 34.5% and 40.2% differ from the federal statutory rate of 35.0% primarily due to the inclusion of state income taxes and permanent rate differences, which primarily relate to meals and entertainment, offset in the current three months by the discrete tax item referenced above.

Other Long-Term Liabilities

Other Long-Term Liabilities	3 Months Ended
	Jun. 30, 2017
Other Liabilities Disclosure [Abstract]
OTHER LONG-TERM LIABILITIES	OTHER LONG-TERM LIABILITIES Other long-term liabilities consisted of the following: June 30, March 31, Deferred rent $ 65,990 $ 63,854 Postretirement benefit obligations 124,986 123,492 Other (1) 41,600 40,593 Total other long-term liabilities $ 232,576 $ 227,939 (1) Balance at June 30, 2017 includes the Company's long-term disability obligation of $22.5 million as well as contingent consideration of $3.6 million related to the Company's acquisition as discussed in Note 4.

Employee Benefit Plans

Employee Benefit Plans	3 Months Ended
	Jun. 30, 2017
Compensation and Retirement Disclosure [Abstract]
EMPLOYEE BENEFIT PLANS	EMPLOYEE BENEFIT PLANS Defined Contribution Plan The Company sponsors the Employees’ Capital Accumulation Plan, or ECAP, which is a qualified defined contribution plan that covers eligible U.S. and international employees. ECAP provides for distributions, subject to certain vesting provisions, to participants by reason of retirement, death, disability, or termination of employment. Effective April 1, 2014, the Company transitioned from a discretionary employer contribution to an annual matching contribution of up to 6% of eligible annual income as determined by the Code for the ECAP. Total expense recognized under ECAP was $31.1 million and $28.8 million for the three months ended June 30, 2017 and 2016 , respectively. The Company-paid contributions were $15.6 million and $15.3 million for the three months ended June 30, 2017 and 2016 , respectively. Defined Benefit Plan and Other Postretirement Benefit Plans The Company provides postretirement healthcare benefits to former officers under a medical indemnity insurance plan, with premiums paid by the Company. This plan is referred to as the Officer Medical Plan. The Company also established a non-qualified defined benefit plan for all officers in May 1995, or the Retired Officers' Bonus Plan, which pays a lump-sum amount of $10,000 per year of service as an officer, provided the officer meets retirement vesting requirements. The Company also provides a fixed annual allowance after retirement to cover financial counseling and other expenses. The Retired Officers' Bonus Plan is not salary related, but rather is based primarily on years of service. During fiscal 2017, the Company adopted a new plan which will provide for a one-time, lump sum retirement payment of one month’s salary when a vice-president retires from the Company, effective April 1, 2017. This is referred to as the Retired Vice-President Bonus Plan. Additionally, the Company offers medical and dental benefits to inactive employees (and their eligible dependents) on long-term disability. The components of net postretirement medical expense for the Officer Medical Plan were as follows: Three Months Ended 2017 2016 Service cost $ 1,116 $ 1,213 Interest cost 1,252 1,196 Net actuarial loss 568 762 Total postretirement medical expense $ 2,936 $ 3,171 As of June 30, 2017 and March 31, 2017 , the unfunded status of the post-retirement medical plan was $119.6 million and $118.1 million , respectively, which is included in other long-term liabilities in the accompanying condensed consolidated balance sheets.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	3 Months Ended
	Jun. 30, 2017
Equity [Abstract]
ACCUMULATED OTHER COMPREHENSIVE LOSS	ACCUMULATED OTHER COMPREHENSIVE LOSS All amounts recorded in other comprehensive loss are related to the Company's post-retirement plans and interest rate swaps designated as cash flow hedges. The following table shows the changes in accumulated other comprehensive income (loss), net of tax: Three Months Ended June 30, 2017 Post-retirement plans Derivatives designated as cash flow hedges Totals Beginning of period $ (17,077 ) $ — $ (17,077 ) Other comprehensive income (loss) before reclassifications (1) — (510 ) (510 ) Amounts reclassified from accumulated other comprehensive loss 363 — 363 Net current-period other comprehensive income (loss) 363 (510 ) (147 ) End of period $ (16,714 ) $ (510 ) $ (17,224 ) (1) Changes in other comprehensive income (loss) before reclassification for derivatives designated as cash flow hedges are recorded net of tax benefits of $0.3 million . Three Months Ended June 30, 2016 Post-retirement plans Derivatives designated as cash flow hedges Totals Beginning of period $ (19,613 ) $ — $ (19,613 ) Other comprehensive income (loss) before reclassifications — — — Amounts reclassified from accumulated other comprehensive loss 457 — 457 Net current-period other comprehensive income (loss) 457 — 457 End of period $ (19,156 ) $ — $ (19,156 ) The following table presents the reclassifications out of accumulated other comprehensive loss to net income: Three Months Ended 2017 2016 Amounts reclassified from accumulated other comprehensive loss: Amortization of net actuarial loss included in net periodic benefit cost (See Note 12) $ 597 $ 762 Tax benefit (234 ) (305 ) Net of tax 363 457

Stockholders' Equity

Stockholders' Equity	3 Months Ended
	Jun. 30, 2017
Equity [Abstract]
STOCKHOLDERS' EQUITY	STOCKHOLDERS’ EQUITY Common Stock The common stock shares activity consisted of the following: Class A Common Stock Treasury Stock Balance at March 31, 2016 153,391,058 5,398,596 Issuance of common stock 578,932 — Stock options exercised 1,931,495 — Repurchase of common stock (1) — 1,615,181 Balance at March 31, 2017 155,901,485 7,013,777 Issuance of common stock 465,989 — Stock options exercised 433,242 — Repurchase of common stock (2) — 1,110,834 Balance at June 30, 2017 156,800,716 8,124,611 (1) During fiscal 2017, the Company purchased 1.3 million shares of the Company’s Class A Common Stock in a series of open market transactions for $46.4 million . Additionally, the Company repurchased shares during fiscal 2017 to cover the minimum statutory withholding taxes on restricted stock awards and restricted stock units that vested on March 31, 2017. The Company also repurchased shares to cover the minimum statutory withholding taxes on restricted stock for departing officers, as they are no longer subject to a substantial risk of forfeiture. (2) During the first quarter of fiscal 2018, the Company purchased 1.0 million shares of the Company’s Class A Common Stock in a series of open market transactions for $33.9 million . Additionally, the Company repurchased shares during the first quarter of fiscal 2018 to cover the minimum statutory withholding taxes on restricted stock awards and restricted stock units that vested on June 30, 2017. For the quarterly offering period that closed on June 30, 2017 , 57,445 Class A Common Stock shares were purchased by employees under the Company's Employee Stock Purchase Plan, or ESPP. Since the program's inception, 1,992,352 shares have been purchased by employees.

Stock-Based Compensation

Stock-Based Compensation	3 Months Ended
	Jun. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
STOCK-BASED COMPENSATION	STOCK-BASED COMPENSATION The following table summarizes stock-based compensation expense recognized in the condensed consolidated statements of operations: Three Months Ended 2017 2016 Cost of revenue $ 1,459 $ 1,508 General and administrative expenses 3,790 4,381 Total $ 5,249 $ 5,889 The following table summarizes the total stock-based compensation expense recognized in the condensed consolidated statements of operations by the following types of equity awards: Three Months Ended 2017 2016 Equity Incentive Plan Options $ 476 $ 1,258 Class A Restricted Common Stock 4,773 4,631 Total $ 5,249 $ 5,889 As of June 30, 2017 , there was $26.5 million of total unrecognized compensation cost related to unvested stock-based compensation agreements. The unrecognized compensation cost as of June 30, 2017 is expected to be fully amortized over the next 4.75 years. Absent the effect of accelerating stock compensation cost for any departures of employees who may continue to vest in their equity awards, the following table summarizes the unrecognized compensation cost and the weighted-average period the cost is expected to be amortized. June 30, 2017 Unrecognized Compensation Cost Weighted Average Remaining Period to be Recognized (in years) Equity Incentive Plan Options $ 4,154 4.16 Class A Restricted Common Stock 22,353 2.35 Total $ 26,507 Equity Incentive Plan On May 17, 2017, 211,822 options were granted under the Amended and Restated Equity Incentive Plan, or EIP. The estimated fair value of the per-option grant was $9.32 , resulting in a total fair value of $2.0 million . On May 19, 2017, 158,283 options were granted under the EIP. The estimated fair value of the per-option grant was $9.48 , resulting in a total fair value of $1.5 million . As of June 30, 2017 , there were 3,751,067 EIP options outstanding, of which 937,633 were unvested. Grants of Restricted Stock Units and Class A Restricted Common Stock On May 17, 2017, the Board of Directors granted 6,848 shares of Class A restricted common stock to members of the Board of Directors. The aggregate value of these awards was estimated at $0.2 million based on the stock price of $35.63 on the grant date. On May 17, 2017, the Board of Directors granted 47,405 restricted stock units to certain newly hired and newly promoted vice presidents. The aggregate fair value was estimated at $1.7 million based on the stock price of $35.63 on the grant date. On May 17 and May 19, 2017, the Board of Directors granted a total of 266,291 and 134,904 restricted stock units with service-based and performance-based vesting terms, respectively. Service-based restricted stock units vest in equal installments over a three -year period subject to the grantee's continued service on each applicable vesting date and are settled for shares of the Company's common stock. Dividend equivalents are paid in respect of the service-based restricted stock units when dividends are paid on the Company's common stock. Performance-based awards vest at the end of a three -year period subject to certain specified financial performance criteria and the grantee's continued service through the period. These awards are settled for Company common stock and dividend equivalents. Compensation expense for performance-based awards during the performance period is estimated at each reporting date using management's expectation of the probable achievement of the specified performance criteria and is adjusted to the extent the expected achievement changes. The fair value of all awards issued on May 17, 2017 and May 19, 2017 was estimated at $9.5 million and $4.9 million , respectively, based on the stock price of $35.63 on May 17 and $35.95 on May 19, 2017. As permitted under the terms of the EIP, the Compensation Committee, as Administrator of the EIP, authorized the withholding of taxes not to exceed the minimum statutory withholding amount, through the surrender of restricted stock units upon the vesting of restricted stock units and the surrender of shares of Class A Common Stock issuable upon the vesting of restricted stock. The participants surrendered 140,534 shares of Class A Common Stock issuable upon the vesting of restricted stock and recorded them as treasury shares at a cost of $4.6 million during the three months ended June 30, 2017 .

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Jun. 30, 2017
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENTS	FAIR VALUE MEASUREMENTS The accounting standard for fair value measurements establishes a three-tier value hierarchy, which prioritizes the inputs used in measuring fair value as follows: observable inputs such as quoted prices in active markets (Level 1); inputs other than quoted prices in active markets that are observable either directly or indirectly (Level 2); and unobservable inputs in which there is little or no market data, which requires the Company to develop its own assumptions (Level 3). A financial instrument's level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The financial instruments measured at fair value in the accompanying condensed consolidated balance sheets consist of the following: Recurring Fair Value Measurements Level 1 Level 2 Level 3 Total Cash and cash equivalents: Cash and cash equivalents $ 45,425 $ — $ — $ 45,425 Money market funds (1) — 292,062 — 292,062 Total cash and cash equivalents $ 45,425 $ 292,062 $ — $ 337,487 Other Assets: Derivative instruments (3) — 258 — 258 Total Other Assets $ — $ 258 $ — $ 258 Liabilities: Contingent consideration liability (2) — — 3,576 3,576 Current derivative instruments (3) — 348 — 348 Long-term derivative instruments (3) — 752 — 752 Total Liabilities $ — $ 1,100 $ 3,576 $ 4,676 Recurring Fair Value Measurements Level 1 Level 2 Level 3 Total Cash and cash equivalents: Cash and cash equivalents $ 59,825 $ — $ — $ 59,825 Money market funds (1) — 157,592 — 157,592 Total cash and cash equivalents $ 59,825 $ 157,592 $ — $ 217,417 Liabilities: Contingent consideration liability (2) — — 3,576 3,576 Total Liabilities $ — $ — $ 3,576 $ 3,576 (1) Level 2 cash and cash equivalents are invested in money market funds that are intended to maintain a stable net asset value of $1.00 per share by investing in liquid, high quality U.S. dollar-denominated money market instruments. Therefore, the fair value approximates the carrying value. Depending on our short-term liquidity needs, we make regular transfers between money market funds and other cash equivalents. (2) As discussed in Note 4, the Company recognized a contingent consideration liability in connection with the acquisition of Aquilent. As of June 30, 2017 and March 31, 2017, the estimated fair value of the contingent consideration liability was $3.6 million and was valued using probability-weighted cash flows, which is based on the use of Level 3 fair value measurement inputs. The liability is recorded in other long-term liabilities in the consolidated balance sheet. (3) The Company’s interest rate swaps are considered over-the-counter derivatives and fair value is estimated based on valuation models that use Level 2 observable interest rate yield curves as inputs. See Note 9 for further discussion on the Company’s derivative instruments designated as cash flow hedges. The fair value of the Company's debt, as well as the Senior Notes, approximates their carrying value at June 30, 2017 and March 31, 2017 . The fair value of debt is determined using quoted prices or other market information obtained from recent trading activity of each debt tranche in markets that are not active (Level 2 inputs). The fair value is corroborated by prices derived from the interest rate spreads of recently completed leveraged loan transactions of a similar credit profile, industry, and terms to that of the Company. The fair value of the Senior Notes is determined using quoted prices or other market information obtained from recent trading activity in the high-yield bond market (Level 2 inputs).

Related-Party Transactions

Related-Party Transactions	3 Months Ended
	Jun. 30, 2017
Related Party Transactions [Abstract]
RELATED-PARTY TRANSACTIONS	RELATED-PARTY TRANSACTIONS In March 2017, the Company supported the formation of the Booz Allen Foundation, a nonprofit corporation organized and operated exclusively for charitable, scientific and educational purposes within the meaning of Section 501(c)(3) of the Code. The Company is the sole member of the foundation, which gives it the authority to appoint two of five of the Booz Allen Foundation's directors and consent rights regarding certain extraordinary corporate actions approved by the board of directors. The Company has made a binding and irrevocable pledge of $5.0 million to the Booz Allen Foundation and recorded the pledge obligation in other current liabilities on the consolidated balance sheet of the Company in March 2017. As of June 30, 2017, the pledge remains unpaid.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Jun. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Letters of Credit and Third-Party Guarantees As of June 30, 2017 and March 31, 2017 , the Company was contingently liable under open standby letters of credit and bank guarantees issued by our banks in favor of third parties that totaled $8.0 million and $8.6 million , respectively. These letters of credit and bank guarantees primarily support insurance and bid and performance obligations. At June 30, 2017 and March 31, 2017 , approximately $1.2 million and $1.7 million , respectively, of these instruments reduce the available borrowings under the Revolving Credit Facility. The remainder are guaranteed under a separate $10.0 million facility established in fiscal 2015 of which $3.1 million was available to the Company at June 30, 2017 and March 31, 2017 . Government Contracting Matters For the three months ended June 30, 2017 and 2016 , approximately 97% and 98% , respectively, of the Company's revenue was generated from contracts where the end user was an agency or department of the U.S. government, including contracts where the Company performed either as a prime contractor or subcontractor, and regardless of the geographic location in which the work was performed. U.S. government contracts and subcontracts are subject to extensive legal and regulatory requirements. From time to time and in the ordinary course of business, agencies of the U.S. government audit our contract costs and conduct inquiries and investigations of our business practices with respect to government contracts to determine whether the Company’s operations are conducted in accordance with these requirements and the terms of the relevant contracts. U.S. government agencies, including the Defense Contract Audit Agency, routinely audit our contract costs, including allocated indirect costs for compliance with the Cost Accounting Standards and the Federal Acquisition Regulation. These agencies also conduct reviews and investigations and make inquiries regarding our accounting and other systems in connection with our performance and business practices with respect to our government contracts and subcontracts. U.S. government audits, inquiries, or investigations of the Company, whether related to the Company's U.S. government contracts or subcontracts or conducted for other reasons, could result in administrative, civil, or criminal liabilities, including withholding of payments, suspension of payments, repayments, fines, or penalties being imposed upon the Company, or could lead to suspension or debarment from future U.S. government contracting. Management believes it has recorded the appropriate provision for any audit, inquiry, or investigation of which it is aware. Management believes it has recorded the appropriate provision for the estimated losses that may be experienced from any such reductions and/or penalties. As of June 30, 2017 and March 31, 2017 , the Company has recorded a liability of approximately $178.3 million and $175.7 million , respectively, for its current best estimate of amounts to be refunded to customers for potential adjustments from audits or reviews of contract costs incurred subsequent to fiscal year 2011, and for contracts not yet closed that are impacted by settlement of audits or reviews of contract costs incurred in prior fiscal years. Litigation The Company is involved in legal proceedings and investigations arising in the ordinary course of business, including those relating to employment matters, relationships with clients and contractors, intellectual property disputes, and other business matters. These legal proceedings seek various remedies, including claims for monetary damages in varying amounts, none of which are considered material, or are unspecified as to amount. Although the outcome of any such matter is inherently uncertain and may be materially adverse, based on current information, management does not expect any of the currently ongoing audits, reviews, investigations, or litigation to have a material adverse effect on the Company’s financial condition and results of operations. As of June 30, 2017 , there are no material amounts accrued in the condensed consolidated financial statements related to these proceedings. Six former officers and stockholders who had departed the company prior to the acquisition of the Company by the Carlyle Group (the "Acquisition") have filed a total of nine suits in various jurisdictions, with original filing dates ranging from July 3, 2008 through December 15, 2009, against us and certain of our current and former directors and officers. Three of these suits were amended on July 2, 2010 and then further amended into one consolidated complaint on September 7, 2010. Another two of the original nine suits were consolidated into one complaint on September 24, 2014. Each of the suits arises out of the Acquisition and alleges that the former stockholders are entitled to certain payments that they would have received if they had held their stock at the time of the Acquisition. Some of the suits also allege that the Acquisition price paid to stockholders was insufficient. The various suits assert claims for breach of contract, tortious interference with contract, breach of fiduciary duty, civil Racketeer Influenced and Corrupt Organizations Act, or RICO, violations, violations of the Employee Retirement Income Security Act, and/or securities and common law fraud. Three of these suits have been dismissed with all appeals exhausted. The two suits that were consolidated into one action on September 24, 2014 were settled on April 16, 2015. One of the remaining suits has been dismissed by the United States District Court for the Southern District of California and such dismissal was upheld by the United States Court of Appeals for the Ninth Circuit. The plaintiff in this suit subsequently filed a Petition for Writ of Certiorari to the United States Supreme Court, which was denied by the United States Supreme Court on January 9, 2017. The other three remaining suits that were previously consolidated on September 7, 2010 have been dismissed by the United States District Court for the Southern District of New York and are on appeal before the United States Court of Appeals for the Second Circuit. On December 15, 2016, hearings relating to the appeal were held before the United States Court of Appeals for the Second Circuit. As of June 30, 2017 , the United States Court of Appeals for the Second Circuit has not ruled on this appeal. As of June 30, 2017 and March 31, 2017 , the aggregate alleged damages sought in these three remaining suits was approximately $241.7 million (substantially all of which is sought to be trebled pursuant to RICO), plus punitive damages, costs, and fees. On July 13, 2017, the United States Court of Appeals for the Second Circuit ruled on the case and affirmed the ruling of the United States District Court for the Southern District of New York, except for one plaintiff’s securities fraud claim. The United States Court of Appeals for the Second Circuit remanded the case to the United States District Court for the Southern District of New York to give the plaintiff leave to file another amended complaint to attempt to plead a securities fraud claim. As of August 3, 2017, the aggregate alleged damages that will be sought in the remaining suit is unknown. Although the outcome of any of these cases is inherently uncertain and may be materially adverse, based on current information, management does not expect them to have a material adverse effect on our financial condition and results of operations. On June 7, 2017, Booz Allen Hamilton Inc. was informed that the U.S. Department of Justice (DOJ) is conducting a civil and criminal investigation of the Company. In connection with the investigation, the DOJ has requested information from the Company relating to certain elements of the Company’s cost accounting and indirect cost charging practices with the U.S. government. Since learning of the investigation, the Company has engaged a law firm experienced in these matters to represent the Company in connection with this matter and respond to the government's requests. The Company is continuing to cooperate with the DOJ in order to bring the matter to an appropriate resolution. The total cost associated with the investigation will depend on many factors, including the length and findings of the investigation. At this stage of the investigation, the Company is not able to reasonably estimate the expected amount or range of cost or any loss associated with the investigation. On June 19, 2017, a purported stockholder of the Company filed a putative class action lawsuit in the United States District Court for the Eastern District of Virginia naming the Company, its Chief Executive Officer and its Chief Financial Officer as defendants purportedly on behalf of all purchasers of the Company’s securities from May 19, 2016 through June 15, 2017. The complaint asserts claims under Sections 10(b) and 20(a) of the Securities Exchange Act of 1934, as amended, and Rule 10b-5 promulgated thereunder, alleging misrepresentations or omissions by the Company concerning the Company’s business, results of operations and compliance policies relating to the Company’s contracts with the United States government. The plaintiff seeks to recover from the Company and the individual defendants an unspecified amount of damages class members allegedly incurred by buying the Company’s securities at an allegedly inflated price. The Company believes the suit lacks merit and intends to defend against the lawsuit. At this stage of the lawsuit, the Company is not able to reasonably estimate the expected amount or range of cost or any loss associated with the lawsuit.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
Reconciliation of the income used to compute basic and diluted EPS	A reconciliation of the income used to compute basic and diluted EPS for the periods presented are as follows: Three Months Ended 2017 2016 Earnings for basic computations (1) $ 78,955 $ 67,247 Weighted-average common shares outstanding for basic computations 147,714,993 147,241,782 Earnings for diluted computations (1) $ 78,961 $ 67,254 Dilutive stock options and restricted stock 2,153,280 2,392,810 Weighted-average common shares outstanding for diluted computations 149,868,273 149,634,592 Earnings per common share Basic $ 0.53 $ 0.46 Diluted $ 0.53 $ 0.45 (1) During the three months ended June 30, 2017 and 2016 , approximately 1.1 million and 1.2 million participating securities were paid dividends totaling $0.2 million and $0.2 million , respectively. For both the three months ended June 30, 2017 and 2016 , there were undistributed earnings of $0.4 million allocated to the participating class of securities in both basic and diluted EPS. The allocated undistributed earnings and the dividends paid comprise the difference between net income presented on the condensed consolidated statements of operations and earnings for basic and diluted computations for the three months ended June 30, 2017 and 2016

Acquisitions Acquisitions (Tabl

Acquisitions Acquisitions (Tables)	3 Months Ended
	Jun. 30, 2017
Business Combinations [Abstract]
Schedule of Consideration Transferred	The following table summarizes the preliminary determination of the total consideration transferred as of June 30, 2017, reflecting such adjustment: Cash purchase price paid to Aquilent shareholders $ 250,000 Working capital and other closing adjustments (1,729 ) Acquired cash on hand 2,998 Acquisition-related compensation expenses (1,291 ) Acquisition-related contingent consideration 3,576 Total estimated purchase consideration transferred at closing $ 253,554
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table represents the preliminary fair value of assets acquired and liabilities assumed as of the acquisition date: Preliminary allocation: Current assets $ 15,809 Other tangible assets 1,144 Customer-relationship intangible assets 69,000 Goodwill 199,826 Current liabilities (8,450 ) Tax liability (13,554 ) Income tax uncertainty (10,221 ) Total purchase consideration transfer at closing $ 253,554

Accounts Receivable, Net (Table

Accounts Receivable, Net (Tables)	3 Months Ended
	Jun. 30, 2017
Receivables [Abstract]
Accounts receivable, net	Accounts receivable, net consisted of the following: June 30, March 31, Current Accounts receivable–billed $ 442,028 $ 340,716 Accounts receivable–unbilled 632,809 651,094 Allowance for doubtful accounts (869 ) — Accounts receivable, net of allowance 1,073,968 991,810 Long-term Accounts receivable–unbilled 60,201 59,913 Total accounts receivable, net $ 1,134,169 $ 1,051,723

Accounts Payable and Other Ac28

Accounts Payable and Other Accrued Expenses (Tables)	3 Months Ended
	Jun. 30, 2017
Payables and Accruals [Abstract]
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]	Accounts payable and other accrued expenses consisted of the following: June 30, March 31, Vendor payables $ 269,853 $ 268,630 Accrued expenses 238,577 235,487 Total accounts payable and other accrued expenses $ 508,430 $ 504,117

Accrued Compensation and Bene29

Accrued Compensation and Benefits (Tables)	3 Months Ended
	Jun. 30, 2017
Compensation Related Costs [Abstract]
Accrued compensation and benefits	Accrued compensation and benefits consisted of the following: June 30, March 31, Bonus $ 20,790 $ 77,765 Retirement 47,405 31,879 Vacation 129,289 124,486 Other 29,552 29,686 Total accrued compensation and benefits $ 227,036 $ 263,816

Debt (Tables)

Debt (Tables)	3 Months Ended
	Jun. 30, 2017
Debt Disclosure [Abstract]
Debt	Debt consisted of the following: June 30, 2017 March 31, 2017 Interest Rate Outstanding Balance Interest Rate Outstanding Balance Term Loan A 3.22 % $ 1,138,638 2.98 % $ 1,153,425 Term Loan B 3.34 % 397,000 3.08 % 398,000 Revolving Credit Facility (ABR) — % — 5.00 % 80,000 Revolving Credit Facility (LIBOR) — % — 2.98 % 50,000 Senior Notes 5.13 % 350,000 — % — Less: Unamortized debt issuance costs and discount on debt (23,833 ) (18,101 ) Total 1,861,805 1,663,324 Less: Current portion of long-term debt (63,150 ) (193,150 ) Long-term debt, net of current portion $ 1,798,655 $ 1,470,174
Interest Expense	ity. The Credit Agreement, as amended, contains customary representations and warranties and customary affirmative and negative covenants. The negative covenants include limitations on the following, in each case subject to certain exceptions: (i) indebtedness and liens, (ii) mergers, consolidations or amalgamations, liquidations, wind-ups or dissolutions, and disposition of all or substantially all assets; (iii) dispositions of property; (iv) restricted payments; (v) investments; (vi) transactions with affiliates; (vii) sale and lease back transactions; (viii) change in fiscal periods; (ix) negative pledges; (x) restrictive agreements; (xi) line of business; and (xii) speculative hedging. The events of default include the following, in each case subject to certain exceptions: (a) failure to make required payments under the Secured Credit Facility; (b) material breaches of representations or warranties under the Secured Credit Facility; (c) failure to observe covenants or agreements under the Secured Credit Facility; (d) failure to pay or default under certain other material indebtedness; (e) bankruptcy or insolvency; (f) certain ERISA events; (g) certain material judgments; (h) actual or asserted invalidity of the Guarantee and Collateral Agreements or the other security documents or failure of the guarantees or perfected liens thereunder; and (i) a change of control. In addition, Booz Allen Hamilton is required to meet certain financial covenants at each quarter end, namely Consolidated Net Total Leverage and Consolidated Net Interest Coverage Ratios. Senior Notes On April 25, 2017, Booz Allen Hamilton issued $350 million aggregate principal amount of its 5.125% Senior Notes, or the Senior Notes, under an Indenture, dated as of April 25, 2017, among Booz Allen Hamilton, certain subsidiaries of Booz Allen Hamilton, as guarantors, or the Subsidiary Guarantors, and Wilmington Trust, National Association, as trustee, or the Trustee, as supplemented by the First Supplemental Indenture, dated as of April 25, 2017, among Booz Allen Hamilton, the Subsidiary Guarantors and the Trustee. Each of Booz Allen Hamilton's existing and future domestic restricted subsidiaries that guarantee its obligations under the Secured Credit Facility and certain other indebtedness will guarantee the Senior Notes on a senior unsecured basis. Interest is payable semi-annually on May 1 and November 1 of each year, beginning on November 1, 2017, and principal is due at maturity on May 1, 2025. In connection with the Senior Notes, the Company recognized $6.7 million of issuance costs, which were recorded as an offset against the carrying value of debt and will be amortized to interest expense over the term of the Senior Notes. As of June 30, 2017 and March 31, 2017 , Booz Allen Hamilton was in compliance with all financial covenants associated with its debt and debt-like instruments. Interest on debt and debt-like instruments consiste

Other Long-Term Liabilities (Ta

Other Long-Term Liabilities (Tables)	3 Months Ended
	Jun. 30, 2017
Other Liabilities Disclosure [Abstract]
Other Long-Term Liabilities	Other long-term liabilities consisted of the following: June 30, March 31, Deferred rent $ 65,990 $ 63,854 Postretirement benefit obligations 124,986 123,492 Other (1) 41,600 40,593 Total other long-term liabilities $ 232,576 $ 227,939

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	3 Months Ended
	Jun. 30, 2017
Compensation and Retirement Disclosure [Abstract]
Components of net postretirement medical expense	The components of net postretirement medical expense for the Officer Medical Plan were as follows: Three Months Ended 2017 2016 Service cost $ 1,116 $ 1,213 Interest cost 1,252 1,196 Net actuarial loss 568 762 Total postretirement medical expense $ 2,936 $ 3,171

Accumulated Other Comprehensi33

Accumulated Other Comprehensive Loss (Tables)	3 Months Ended
	Jun. 30, 2017
Equity [Abstract]
Schedule of accumulated other comprehensive loss	The following table shows the changes in accumulated other comprehensive income (loss), net of tax: Three Months Ended June 30, 2017 Post-retirement plans Derivatives designated as cash flow hedges Totals Beginning of period $ (17,077 ) $ — $ (17,077 ) Other comprehensive income (loss) before reclassifications (1) — (510 ) (510 ) Amounts reclassified from accumulated other comprehensive loss 363 — 363 Net current-period other comprehensive income (loss) 363 (510 ) (147 ) End of period $ (16,714 ) $ (510 ) $ (17,224 ) (1) Changes in other comprehensive income (loss) before reclassification for derivatives designated as cash flow hedges are recorded net of tax benefits of $0.3 million . Three Months Ended June 30, 2016 Post-retirement plans Derivatives designated as cash flow hedges Totals Beginning of period $ (19,613 ) $ — $ (19,613 ) Other comprehensive income (loss) before reclassifications — — — Amounts reclassified from accumulated other comprehensive loss 457 — 457 Net current-period other comprehensive income (loss) 457 — 457 End of period $ (19,156 ) $ — $ (19,156 )
Reclassification out of accumulated other comprehensive loss to net income	The following table presents the reclassifications out of accumulated other comprehensive loss to net income: Three Months Ended 2017 2016 Amounts reclassified from accumulated other comprehensive loss: Amortization of net actuarial loss included in net periodic benefit cost (See Note 12) $ 597 $ 762 Tax benefit (234 ) (305 ) Net of tax 363 457

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	3 Months Ended
	Jun. 30, 2017
Equity [Abstract]
Common stock shares activity	The common stock shares activity consisted of the following: Class A Common Stock Treasury Stock Balance at March 31, 2016 153,391,058 5,398,596 Issuance of common stock 578,932 — Stock options exercised 1,931,495 — Repurchase of common stock (1) — 1,615,181 Balance at March 31, 2017 155,901,485 7,013,777 Issuance of common stock 465,989 — Stock options exercised 433,242 — Repurchase of common stock (2) — 1,110,834 Balance at June 30, 2017 156,800,716 8,124,611

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	3 Months Ended
	Jun. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-based compensation expense recognized in the condensed consolidated statements of operations	The following table summarizes stock-based compensation expense recognized in the condensed consolidated statements of operations: Three Months Ended 2017 2016 Cost of revenue $ 1,459 $ 1,508 General and administrative expenses 3,790 4,381 Total $ 5,249 $ 5,889 The following table summarizes the total stock-based compensation expense recognized in the condensed consolidated statements of operations by the following types of equity awards: Three Months Ended 2017 2016 Equity Incentive Plan Options $ 476 $ 1,258 Class A Restricted Common Stock 4,773 4,631 Total $ 5,249 $ 5,889
Schedule of unrecognized compensation cost	Absent the effect of accelerating stock compensation cost for any departures of employees who may continue to vest in their equity awards, the following table summarizes the unrecognized compensation cost and the weighted-average period the cost is expected to be amortized. June 30, 2017 Unrecognized Compensation Cost Weighted Average Remaining Period to be Recognized (in years) Equity Incentive Plan Options $ 4,154 4.16 Class A Restricted Common Stock 22,353 2.35 Total $ 26,507

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Jun. 30, 2017
Fair Value Disclosures [Abstract]
Recurring Fair Value Measurements	Recurring Fair Value Measurements Level 1 Level 2 Level 3 Total Cash and cash equivalents: Cash and cash equivalents $ 45,425 $ — $ — $ 45,425 Money market funds (1) — 292,062 — 292,062 Total cash and cash equivalents $ 45,425 $ 292,062 $ — $ 337,487 Other Assets: Derivative instruments (3) — 258 — 258 Total Other Assets $ — $ 258 $ — $ 258 Liabilities: Contingent consideration liability (2) — — 3,576 3,576 Current derivative instruments (3) — 348 — 348 Long-term derivative instruments (3) — 752 — 752 Total Liabilities $ — $ 1,100 $ 3,576 $ 4,676 Recurring Fair Value Measurements Level 1 Level 2 Level 3 Total Cash and cash equivalents: Cash and cash equivalents $ 59,825 $ — $ — $ 59,825 Money market funds (1) — 157,592 — 157,592 Total cash and cash equivalents $ 59,825 $ 157,592 $ — $ 217,417 Liabilities: Contingent consideration liability (2) — — 3,576 3,576 Total Liabilities $ — $ — $ 3,576 $ 3,576 (1) Level 2 cash and cash equivalents are invested in money market funds that are intended to maintain a stable net asset value of $1.00 per share by investing in liquid, high quality U.S. dollar-denominated money market instruments. Therefore, the fair value approximates the carrying value. Depending on our short-term liquidity needs, we make regular transfers between money market funds and other cash equivalents. (2) As discussed in Note 4, the Company recognized a contingent consideration liability in connection with the acquisition of Aquilent. As of June 30, 2017 and March 31, 2017, the estimated fair value of the contingent consideration liability was $3.6 million and was valued using probability-weighted cash flows, which is based on the use of Level 3 fair value measurement inputs. The liability is recorded in other long-term liabilities in the consolidated balance sheet. (3) The Company’s interest rate swaps are considered over-the-counter derivatives and fair value is estimated based on valuation models that use Level 2 observable interest rate yield curves as inputs. See Note 9 for further discussion on the Company’s derivative instruments designated as cash flow hedges.

Business Overview (Details)

Business Overview (Details)	3 Months Ended
	Jun. 30, 2017employeessegments
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of operating segments | segments	1
Number of employees | employees	23,400

Basis of Presentation Basis of

Basis of Presentation Basis of Presentation (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Excess Tax Benefit from Share-based Compensation, Operating Activities	$ 6,864	$ 3,546

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
		Jun. 30, 2017	Jun. 30, 2016
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Earnings for basic computations	[1]	$ 78,955	$ 67,247
Earnings for diluted computations	[1]	$ 78,961	$ 67,254
Dilutive stock options and restricted stock		2,153,280	2,392,810
Earnings per common share, Basic		$ 0.53	$ 0.46
Earnings per common share, Diluted		$ 0.53	$ 0.45
Unvested shares, cash dividends paid		$ 25,412	$ 22,349
Restricted stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Unvested shares participating in the payment of the Company's dividends declared		1,100,000	1,200,000
Unvested shares, cash dividends paid		$ 200	$ 200
Undistributed earnings allocated to participating securities, basic		400	400
Undistributed earnings allocated to participating securities, diluted		$ 400	$ 400
Stock options
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive options excluded from the computation of EPS		200,000	500,000
Common stock, Class A
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Weighted-average common shares outstanding for basic computations		147,714,993	147,241,782
Weighted-average common shares outstanding for diluted computations		149,868,273	149,634,592
[1]	(1) During the three months ended June 30, 2017 and 2016, approximately 1.1 million and 1.2 million participating securities were paid dividends totaling $0.2 million and $0.2 million, respectively. For both the three months ended June 30, 2017 and 2016, there were undistributed earnings of $0.4 million allocated to the participating class of securities in both basic and diluted EPS. The allocated undistributed earnings and the dividends paid comprise the difference between net income presented on the condensed consolidated statements of operations and earnings for basic and diluted computations for the three months ended June 30, 2017 and 2016.

Acquisitions Acquisitions (Sche

Acquisitions Acquisitions (Schedule of Consideration Transferred) (Details) - Aquilent $ in Thousands	Jan. 24, 2017USD ($)
Business Acquisition [Line Items]
Cash purchase price paid to Aquilent shareholders	$ 250,000
Working capital and other closing adjustments	(1,729)
Acquired cash on hand	2,998
Acquisition-related compensation expense	(1,291)
Acquisition-related contingent consideration	3,576
Total estimated purchase consideration and liabilities paid at closing	$ 253,554

Acquisitions Acquisitions (Narr

Acquisitions Acquisitions (Narrative) (Details) - USD ($) $ in Thousands	Jan. 24, 2017	Jun. 30, 2017	Mar. 31, 2017
Business Acquisition [Line Items]
Goodwill		$ 1,571,186	$ 1,571,190
Aquilent
Business Acquisition [Line Items]
Acquisition-related contingent consideration	$ 3,576
Customer-relationship intangible assets	69,000
Tax indemnification liability	13,554
Income tax uncertainty	10,221	$ 10,200
Goodwill	199,826
Customer Relationships | Aquilent
Business Acquisition [Line Items]
Customer-relationship intangible assets	$ 69,000
Finite-lived intangible asset, useful life (in years)	12 years

Acquisitions Acquisitions (Sc42

Acquisitions Acquisitions (Schedule of Recognized Identified Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017	Jan. 24, 2017
Business Acquisition [Line Items]
Goodwill	$ 1,571,186	$ 1,571,190
Aquilent
Business Acquisition [Line Items]
Current assets			$ 15,809
Other tangible assets			1,144
Customer-relationship intangible assets			69,000
Goodwill			199,826
Current liabilities			(8,450)
Tax liability			(13,554)
Income tax uncertainty	$ (10,200)		(10,221)
Total purchase consideration transfer at closing			$ 253,554

Accounts Receivable, Net (Detai

Accounts Receivable, Net (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Mar. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable-billed	$ 442,028		$ 340,716
Allowance for doubtful accounts	(869)		0
Accounts receivable, net, current	1,073,968		991,810
Total accounts receivable, net	1,134,169		1,051,723
Provision for doubtful accounts	800	$ 700
Accounts Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable-unbilled	632,809		651,094
Other Noncurrent Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable-unbilled	$ 60,201		$ 59,913

Accounts Payable and Other Ac44

Accounts Payable and Other Accrued Expenses (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017
Payables and Accruals [Abstract]
Vendor payables	$ 269,853	$ 268,630
Accrued expenses	238,577	235,487
Total accounts payable and other accrued expenses	$ 508,430	$ 504,117

Accrued Compensation and Bene45

Accrued Compensation and Benefits (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017
Compensation Related Costs [Abstract]
Bonus	$ 20,790	$ 77,765
Retirement	47,405	31,879
Vacation	129,289	124,486
Other	29,552	29,686
Total accrued compensation and benefits	$ 227,036	$ 263,816

Debt (Schedule of Debt) (Detail

Debt (Schedule of Debt) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017
Long-term Debt, Current and Noncurrent [Abstract]
Unamortized debt issuance costs and discount on debt	$ (23,833)	$ (18,101)
Long-term Debt	1,861,805	1,663,324
Less: Current portion of long-term debt	(63,150)	(193,150)
Long-term debt, net of current portion	$ 1,798,655	$ 1,470,174
Secured Debt | Term Loan A
Long-term Debt, Current and Noncurrent [Abstract]
Interest rate	3.22%	2.98%
Long-term Debt, Gross	$ 1,138,638	$ 1,153,425
Secured Debt | Term Loan B
Long-term Debt, Current and Noncurrent [Abstract]
Interest rate	3.34%	3.08%
Long-term Debt, Gross	$ 397,000	$ 398,000
Senior Notes | Senior Notes due 2025
Long-term Debt, Current and Noncurrent [Abstract]
Interest rate	5.13%	0.00%
Long-term Debt, Gross	$ 350,000	$ 0
Revolving Credit Facility
Long-term Debt, Current and Noncurrent [Abstract]
Revolving credit facility	$ 0	$ 130,000
Alternative Base Rate (ABR) | Revolving Credit Facility
Long-term Debt, Current and Noncurrent [Abstract]
Line of Credit Facility, Interest Rate at Period End	0.00%	5.00%
Revolving credit facility	$ 0	$ 80,000
London Interbank Offered Rate (LIBOR) | Revolving Credit Facility
Long-term Debt, Current and Noncurrent [Abstract]
Line of Credit Facility, Interest Rate at Period End	0.00%	2.98%
Revolving credit facility	$ 0	$ 50,000

Debt Debt (Details)

Debt Debt (Details) - USD ($) $ in Thousands	Feb. 06, 2017	Jun. 30, 2017	Apr. 25, 2017	Mar. 31, 2017
Debt Instrument [Line Items]
Long-term Debt, Maximum Expanded Loan Facility		$ 400,000
Net secured leverage ratio		350.00%
Secured Debt | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Long-term debt, basis spread on variable rate	1.00%
Secured Debt | London Interbank Offered Rate (LIBOR) | Minimum
Debt Instrument [Line Items]
Long-term debt, basis spread on variable rate		0.00%
Secured Debt | Overnight Federal Funds Rate
Debt Instrument [Line Items]
Long-term debt, basis spread on variable rate	0.50%
Secured Debt | Base Rate | Minimum
Debt Instrument [Line Items]
Long-term debt, basis spread on variable rate		0.00%
Secured Debt | Term Loan A
Debt Instrument [Line Items]
Term loan, face amount		$ 1,138,600
Quarterly periodic payment percentage, principal	1.25%
Secured Debt | Term Loan A | London Interbank Offered Rate (LIBOR) | Minimum
Debt Instrument [Line Items]
Long-term debt, basis spread on variable rate	1.50%
Secured Debt | Term Loan A | London Interbank Offered Rate (LIBOR) | Maximum
Debt Instrument [Line Items]
Long-term debt, basis spread on variable rate	2.25%
Secured Debt | Term Loan A | Alternative Base Rate (ABR) | Minimum
Debt Instrument [Line Items]
Long-term debt, basis spread on variable rate	0.50%
Secured Debt | Term Loan A | Alternative Base Rate (ABR) | Maximum
Debt Instrument [Line Items]
Long-term debt, basis spread on variable rate	1.25%
Secured Debt | Term Loan B
Debt Instrument [Line Items]
Term loan, face amount		397,000
Quarterly periodic payment percentage, principal	0.25%
Secured Debt | Term Loan B | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Long-term debt, basis spread on variable rate	2.25%
Secured Debt | Term Loan B | Alternative Base Rate (ABR)
Debt Instrument [Line Items]
Long-term debt, basis spread on variable rate	1.25%
Secured Debt | Revolving Credit Facility | Minimum
Debt Instrument [Line Items]
Line of Credit Facility, Commitment Fee Percentage	0.30%
Secured Debt | Revolving Credit Facility | Maximum
Debt Instrument [Line Items]
Line of Credit Facility, Commitment Fee Percentage	0.40%
Revolving Credit Facility
Debt Instrument [Line Items]
Revolving credit facility, maximum borrowing capacity		500,000
Proceeds from lines of credit		30,000
Revolving credit facility, amount outstanding		0		$ 130,000
Revolving Credit Facility | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Revolving credit facility, amount outstanding		0		50,000
Revolving Credit Facility | Alternative Base Rate (ABR)
Debt Instrument [Line Items]
Revolving credit facility, amount outstanding		0		$ 80,000
Letter of Credit
Debt Instrument [Line Items]
Revolving credit facility, maximum borrowing capacity		$ 100,000
Senior Notes | Senior Notes due 2025
Debt Instrument [Line Items]
Term loan, face amount			$ 350,000
Debt Instrument, Interest Rate, Stated Percentage			5.125%
Debt Issuance Costs, Gross			$ 6,700

Debt Detail of Interest Expense

Debt Detail of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Debt Instrument [Line Items]
Deferred Payment Obligation, Accrued Interest Payment	$ 2,011	$ 2,000
Amortization of Debt Issuance Costs (DIC) and Original Issue Discount (OID)	1,289	2,083
Interest Expense, Other	108	35
Interest Expense	18,747	17,828
Secured Debt | Term Loan A
Debt Instrument [Line Items]
Interest Expense, Debt	8,777	5,506
Secured Debt | Term Loan B
Debt Instrument [Line Items]
Interest Expense, Debt	3,273	7,974
Revolving Credit Facility
Debt Instrument [Line Items]
Interest Expense, Debt	0	230
Senior Notes | Senior Notes due 2025
Debt Instrument [Line Items]
Interest Expense, Debt	$ 3,289	$ 0

Derivatives Derivatives (Detail

Derivatives Derivatives (Details) $ in Millions	3 Months Ended
	Jun. 30, 2017USD ($)
Other Noncurrent Assets
Derivative [Line Items]
Fair value of derivative assets	$ 0.3
Other Current Liabilities
Derivative [Line Items]
Fair value of derivative liabilities	0.3
Other Noncurrent Liabilities
Derivative [Line Items]
Fair value of derivative liabilities	0.8
Designated as Hedging Instrument | Cash Flow Hedging | Interest Rate Swap
Derivative [Line Items]
Notional amount	450
Loss recognized in AOCI	0.8
Amounts reclassified into earnings	0
Ineffectiveness recognized in earnings	0
Estimate of amount to be reclassified over the next 12 months	$ 0.4

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Income Tax Disclosure [Abstract]
Effective income tax rate	34.50%	40.20%
Excess Tax Benefit from Share-based Compensation, Operating Activities	$ 6,864	$ 3,546
Statutory rate	35.00%

Other Long-Term Liabilities (De

Other Long-Term Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017	Jan. 24, 2017
Other Liabilities Disclosure [Abstract]
Deferred rent	$ 65,990	$ 63,854
Postretirement benefit obligations	124,986	123,492
Other	41,600	40,593
Total other long-term liabilities	232,576	$ 227,939
Long-term disability obligation	$ 22,500
Aquilent
Business Acquisition [Line Items]
Acquisition-related contingent consideration			$ 3,576

Employee Benefit Plans (Details

Employee Benefit Plans (Details) - USD ($)	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Mar. 31, 2017
Compensation and Retirement Disclosure [Abstract]
Employer Matching Contribution, Percent of Match	6.00%
Employees’ Capital Accumulation Plan, Total expense recognized	$ 31,100,000	$ 28,800,000
Employees’ Capital Accumulation Plan, Company-paid contributions	15,600,000	15,300,000
Supplemental Employee Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Deferred Compensation Arrangement with Individual, Annual Cash Award Granted per Year of Service, Amount	10,000
Officer Medical Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	1,116,000	1,213,000
Interest cost	1,252,000	1,196,000
Net actuarial loss	568,000	762,000
Total benefit cost	2,936,000	$ 3,171,000
Defined benefit plan, unfunded status of plan	$ 119,600,000		$ 118,100,000

Accumulated Other Comprehensi53

Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning of period	$ (17,077)	$ (19,613)
Other comprehensive income (loss) before reclassifications	(510)	0
Amounts reclassified from accumulated other comprehensive loss	363	457
Net current-period other comprehensive loss	(147)	457
End of period	(17,224)	(19,156)
Post-retirement plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning of period	(17,077)	(19,613)
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive loss	363	457
Net current-period other comprehensive loss	363	457
End of period	(16,714)	(19,156)
Derivatives designated as cash flow hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning of period	0	0
Other comprehensive income (loss) before reclassifications	(510)	0
Amounts reclassified from accumulated other comprehensive loss	0	0
Net current-period other comprehensive loss	(510)	0
End of period	$ (510)	0
Other comprehensive income (loss) before reclassifications, tax		$ 300

Accumulated Other Comprehensi54

Accumulated Other Comprehensive Loss (Reclassifications out of Accumulated Other Comprehensive Loss to Net Income) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Tax benefit	$ 41,938	$ 45,547
Reclassification out of Accumulated Other Comprehensive Income | Post-retirement plans
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	597	762
Tax benefit	234	305
Net of tax	$ 363	$ 457

Stockholders' Equity (Common St

Stockholders' Equity (Common Stock Shares Activity) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Jun. 30, 2017		Mar. 31, 2017
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury stock, shares, beginning of period	7,013,777		5,398,596
Treasury stock, shares, end of period	8,124,611		7,013,777
Repurchase of common stock	1,110,834	[1]	1,615,181	[2]
Common stock, Class A
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock, shares issued, beginning of period	155,901,485		153,391,058
Issuance of common stock	465,989		578,932
Stock options exercised	433,242		1,931,495
Common stock, shares issued, end of period	156,800,716		155,901,485
Repurchase of common stock	1,000,000		1,300,000
Repurchase of common stock, value, cost method	$ 33.9		$ 46.4
[1]	(2)During the first quarter of fiscal 2018, the Company purchased 1.0 million shares of the Company’s Class A Common Stock in a series of open market transactions for $33.9 million. Additionally, the Company repurchased shares during the first quarter of fiscal 2018 to cover the minimum statutory withholding taxes on restricted stock awards and restricted stock units that vested on June 30, 2017.
[2]	During fiscal 2017, the Company purchased 1.3 million shares of the Company’s Class A Common Stock in a series of open market transactions for $46.4 million. Additionally, the Company repurchased shares during fiscal 2017 to cover the minimum statutory withholding taxes on restricted stock awards and restricted stock units that vested on March 31, 2017. The Company also repurchased shares to cover the minimum statutory withholding taxes on restricted stock for departing officers

Stockholders' Equity (Employee

Stockholders' Equity (Employee Stock Purchase Plan) (Details) - shares	3 Months Ended	80 Months Ended
	Jun. 30, 2017	Jun. 30, 2017
Common stock, Class A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Issued During Period, Shares, Employee Stock Purchase Plans	57,445	1,992,352

Stock-Based Compensation (Stock

Stock-Based Compensation (Stock-based Compensation Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 5,249	$ 5,889
Stock options | EIP
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	476	1,258
Restricted stock | Annual Incentive Plan | Common stock, Class A
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	4,773	4,631
Cost of revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	1,459	1,508
General and administrative expenses
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 3,790	$ 4,381

Stock-Based Compensation (Unrec

Stock-Based Compensation (Unrecognized Compensation) (Details) $ in Thousands	3 Months Ended
	Jun. 30, 2017USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to unvested stock-based compensation agreements	$ 26,507
Unrecognized compensation cost, amortization period	4 years 9 months
EIP | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to unvested stock-based compensation agreements	$ 4,154
Unrecognized compensation cost, amortization period	4 years 1 month 28 days
Annual Incentive Plan | Restricted stock | Common stock, Class A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to unvested stock-based compensation agreements	$ 22,353
Unrecognized compensation cost, amortization period	2 years 4 months 6 days

Stock-Based Compensation (Sto59

Stock-Based Compensation (Stock Plans) (Details) - USD ($) $ / shares in Units, $ in Millions	May 19, 2017	May 17, 2017	Jun. 30, 2017		Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Price	$ 35.95	$ 35.63
Repurchase of common stock			1,110,834	[1]	1,615,181	[2]
EIP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Repurchase of common stock			140,534
Treasury Stock, Value, Acquired, Cost Method			$ 4.6
Stock options | EIP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	158,283	211,822
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 9.48	$ 9.32
share-based compensation arrangement by share-based payment award, options, grants in period, grant date fair value	$ 1.5	$ 2
Stock options outstanding			3,751,067
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number			937,633
Common stock, Class A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Repurchase of common stock			1,000,000		1,300,000
Treasury Stock, Value, Acquired, Cost Method			$ 33.9		$ 46.4
Common stock, Class A | EIP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	$ 4.9	$ 9.5
Common stock, Class A | Restricted stock | EIP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period		6,848
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value		$ 0.2
Common stock, Class A | Restricted stock units (RSUs) | EIP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period		47,405
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value		$ 1.7
Serviced Based Vesting Award | Common stock, Class A | Restricted stock units (RSUs) | EIP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period		266,291
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			3 years
Performance Based Vesting Award | Common stock, Class A | Restricted stock units (RSUs) | EIP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	134,904
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			3 years
[1]	(2)During the first quarter of fiscal 2018, the Company purchased 1.0 million shares of the Company’s Class A Common Stock in a series of open market transactions for $33.9 million. Additionally, the Company repurchased shares during the first quarter of fiscal 2018 to cover the minimum statutory withholding taxes on restricted stock awards and restricted stock units that vested on June 30, 2017.
[2]	During fiscal 2017, the Company purchased 1.3 million shares of the Company’s Class A Common Stock in a series of open market transactions for $46.4 million. Additionally, the Company repurchased shares during fiscal 2017 to cover the minimum statutory withholding taxes on restricted stock awards and restricted stock units that vested on March 31, 2017. The Company also repurchased shares to cover the minimum statutory withholding taxes on restricted stock for departing officers

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
		Jun. 30, 2017	Mar. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents invested in money market funds, net asset value, per share		$ 1
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash and cash equivalents		$ 337,487	$ 217,417
Derivative asset	[1]	258
Total Other Assets		258
Liabilities, Fair Value Disclosure, Recurring		4,676	3,576
Derivative liability, current	[1]	348
Derivative liability, noncurrent	[1]	752
Fair Value, Measurements, Recurring | Cash and cash equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash and cash equivalents		45,425	59,825
Fair Value, Measurements, Recurring | Money market fund
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash and cash equivalents	[2]	292,062	157,592
Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash and cash equivalents		45,425	59,825
Fair Value, Measurements, Recurring | Level 1 | Cash and cash equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash and cash equivalents		45,425	59,825
Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash and cash equivalents		292,062	157,592
Derivative asset	[1]	258
Total Other Assets		258
Liabilities, Fair Value Disclosure, Recurring		1,100
Derivative liability, current	[1]	348
Derivative liability, noncurrent	[1]	752
Fair Value, Measurements, Recurring | Level 2 | Money market fund
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash and cash equivalents	[2]	292,062	157,592
Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash and cash equivalents		0	0
Liabilities, Fair Value Disclosure, Recurring		3,576	3,576
Contingent Consideration | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value Disclosure, Recurring	[3]	3,576	3,576
Contingent Consideration | Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value Disclosure, Recurring	[3]	3,576	3,576
Other Noncurrent Liabilities | Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration, liability, noncurrent		$ 3,600	$ 3,600
[1]	The Company’s interest rate swaps are considered over-the-counter derivatives and fair value is estimated based on valuation models that use Level 2 observable interest rate yield curves as inputs. See Note 9 for further discussion on the Company’s derivative instruments designated as cash flow hedges.
[2]	Level 2 cash and cash equivalents are invested in money market funds that are intended to maintain a stable net asset value of $1.00 per share by investing in liquid, high quality U.S. dollar-denominated money market instruments. Therefore, the fair value approximates the carrying value. Depending on our short-term liquidity needs, we make regular transfers between money market funds and other cash equivalents.
[3]	As discussed in Note 4, the Company recognized a contingent consideration liability in connection with the acquisition of Aquilent. As of June 30, 2017 and March 31, 2017, the estimated fair value of the contingent consideration liability was $3.6 million and was valued using probability-weighted cash flows, which is based on the use of Level 3 fair value measurement inputs. The liability is recorded in other long-term liabilities in the consolidated balance sheet.

Related-Party Transactions (Det

Related-Party Transactions (Details)	Jun. 30, 2017USD ($)
Affiliated Entity [Member] | Pledge Obligation [Member]
Related Party Transaction [Line Items]
Due to Affiliate, Current	$ 5,000,000

Commitments and Contingencies (

Commitments and Contingencies (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Mar. 31, 2017
Contracts with U.S. government agencies or other U.S. government contractors
Concentration Risk [Line Items]
Concentration risk, percentage	97.00%	98.00%
Unfavorable Regulatory Action
Loss Contingencies [Line Items]
Liability for reductions and/or penalties from U.S Governement audits	$ 178.3		$ 175.7
Financial Standby Letter of Credit
Concentration Risk [Line Items]
Guarantor Obligations, Current Carrying Value	8		8.6
Guarantor Obligations, Liquidation Proceeds, Monetary Amount	1.2		1.7
Guarantor Obligations, Facility	10		10
Guarantor Obligations, Available Amount	$ 3.1		$ 3.1

Commitments and Contingencies63

Commitments and Contingencies (Litigation) (Details) $ in Millions	Jan. 09, 2017claims	Apr. 16, 2015claims	Jun. 30, 2017USD ($)claims	Jun. 30, 2016	Mar. 31, 2017USD ($)	Dec. 15, 2009claimsplaintiffs	Jun. 30, 2017claims	Sep. 24, 2014claims	Sep. 23, 2014claims	Sep. 07, 2010claims	Jul. 02, 2010claims
Former stockholder litigation
Loss Contingencies [Line Items]
Loss contingencies, number of plaintiffs | plaintiffs						6
Loss contingencies, new claims filed, number						9
Loss contingencies, claims amended, number								1	2	1	3
Loss contingencies, claims dismissed, number							3
Loss contingencies, claims settled, number		1
Loss contingencies, pending claims, number			3				3
Former stockholder litigation | United States Court of Appeals for the Ninth Circuit [Member]
Loss Contingencies [Line Items]
Loss contingencies, claims dismissed, number	1
Former stockholder litigation | United States Court of Appeals for the Second Circuit
Loss Contingencies [Line Items]
Loss contingencies, pending claims, number			3				3
Former stockholder litigation | RICO
Loss Contingencies [Line Items]
Loss contingencies, damages sought, value | $			$ 241.7		$ 241.7
Government Contracts Concentration Risk [Member]
Loss Contingencies [Line Items]
Concentration risk, percentage			97.00%	98.00%