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Disclosure - Other Current Assets link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - Other Assets link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - Accrued Expenses and Other Current Liabilities link:presentationLink link:calculationLink link:definitionLink 9952170 - Disclosure - Other Non-Current Liabilities link:presentationLink link:calculationLink link:definitionLink 9952171 - Disclosure - Accumulated Other Comprehensive Income/( Loss) link:presentationLink link:calculationLink link:definitionLink 9952172 - Disclosure - Fair Value Measurements link:presentationLink link:calculationLink link:definitionLink 9952173 - Disclosure - Derivatives and Hedge Accounting link:presentationLink link:calculationLink link:definitionLink 9952174 - Disclosure - Borrowings link:presentationLink link:calculationLink link:definitionLink 9952175 - Disclosure - Capital Structure link:presentationLink link:calculationLink link:definitionLink 9952176 - 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Summary of Significant Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - Segment and Geographical Information (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - Revenues, net and Accounts Receivable, net (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - Earnings Per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - Other Income/(Expense), Net (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - Cash, Cash Equivalents and Restricted Cash (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - Investments (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - Property and Equipment (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - 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Disclosure - Borrowings (Tables) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - Capital Structure (Tables) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Employee Benefit Plans (Tables) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Leases (Tables) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Stock-Based Compensation (Tables) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Restructuring Costs (Tables) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Summary of Significant Accounting Policies - Summary of Revenues and Reimbursements (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Summary of Significant Accounting Policies - Schedule of Property and Equipment, Estimated Useful Lives (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Summary of Significant Accounting Policies - Summary of Lived Intangible Assets Amortized over their Estimated Useful Lives (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - Summary of Significant Accounting Policies - Share-Based Compensation (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - Segment and Geographical Information - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - Segment and Geographical Information - Revenues and Cost of Revenues for Company's Reportable Segments (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - Segment and Geographical Information - Revenues Based on Geographical Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - Segment and Geographical Information - Long-Lived Assets by Geographic Area (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - Revenues, net and Accounts Receivable, net - Contracts with Customer, Receivables, Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - Revenues, net and Accounts Receivable, net - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - Revenues, net and Accounts Receivable, net - Contract with Customer Revenue Recognized (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - Revenues, net and Accounts Receivable, net - Contract Acquisition and Fulfillment Costs (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - Revenues, net and Accounts Receivable, net - Accounts Receivable, Net (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - Revenues, net and Accounts Receivable, net - Allowance for Credit Loss (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - Earnings Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - Other Income/(Expense), Net (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - Cash, Cash Equivalents and Restricted Cash (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - Investments - Summary of Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9955553 - Disclosure - Property and Equipment - Schedule of Property and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 9955554 - Disclosure - Property and Equipment - Depreciation and Amortization Expense and Effect of Foreign Exchange Gain (Details) link:presentationLink link:calculationLink link:definitionLink 9955555 - Disclosure - Property and Equipment - Internally Developed Software Costs, Included under Software (Details) link:presentationLink link:calculationLink link:definitionLink 9955556 - Disclosure - Property and Equipment - Amortization Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955557 - Disclosure - Property and Equipment - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955558 - Disclosure - Business Combinations, Goodwill and Other Intangible Assets - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955559 - Disclosure - Business Combinations, Goodwill and Other Intangible Assets - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details) link:presentationLink link:calculationLink link:definitionLink 9955560 - Disclosure - Business Combinations, Goodwill and Other Intangible Assets - Summary of Company's Goodwill (Details) link:presentationLink link:calculationLink link:definitionLink 9955561 - Disclosure - Business Combinations, Goodwill and Other Intangible Assets - Summary of Company's Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955561 - Disclosure - Business Combinations, Goodwill and Other Intangible Assets - Summary of Company's Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955562 - Disclosure - Business Combinations, Goodwill and Other Intangible Assets - Amortization of Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955563 - Disclosure - Business Combinations, Goodwill and Other Intangible Assets - Estimated Future Amortization of Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955564 - Disclosure - Other Current Assets - Schedule of Other Current Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955565 - Disclosure - Other Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955566 - Disclosure - Accrued Expenses and Other Current Liabilities - Summary of Accrued Expenses and Other Current Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955567 - Disclosure - Other Non-Current liabilities - Summary of Other Non-Current Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955568 - Disclosure - Accumulated Other Comprehensive Income/( Loss) - Summary of Accumulated Other Comprehensive Income/( Loss) (Details) link:presentationLink link:calculationLink link:definitionLink 9955569 - Disclosure - Fair Value Measurements - Assets and Liabilities Measured at Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 9955570 - Disclosure - Fair Value Measurements - Changes in the fair value of contingent consideration (Details) link:presentationLink link:calculationLink link:definitionLink 9955571 - Disclosure - Schedule of Derivative Instruments in Statement of Financial Position, Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 9955572 - Disclosure - Derivatives and Hedge Accounting - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955573 - Disclosure - Derivatives and Hedge Accounting - Foreign Currency Forward Contracts (Details) link:presentationLink link:calculationLink link:definitionLink 9955574 - Disclosure - Derivatives and Hedge Accounting - Summary of Fair Value of Foreign Currency Exchange Contracts (Details) link:presentationLink link:calculationLink link:definitionLink 9955575 - Disclosure - Derivatives and Hedge Accounting - Summary of Effect of Foreign Currency Exchange Contracts (Details) link:presentationLink link:calculationLink link:definitionLink 9955576 - Disclosure - Derivatives and Hedge Accounting - Location of Gain or Loss Recognized (Details) link:presentationLink link:calculationLink link:definitionLink 9955577 - Disclosure - Borrowings - Company's Debt Position (Details) link:presentationLink link:calculationLink link:definitionLink 9955578 - Disclosure - Borrowings - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955579 - Disclosure - Borrowings - Credit Facilities Carried an Effective Interest Rate (Details) link:presentationLink link:calculationLink link:definitionLink 9955580 - Disclosure - Borrowings - Maturities of Borrowings (Details) link:presentationLink link:calculationLink link:definitionLink 9955581 - Disclosure - Capital Structure - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955582 - Disclosure - Capital Structure - Purchase of Common Stock from Employees Withholding Tax Payments Related to Vesting of Restricted Stock (Details link:presentationLink link:calculationLink link:definitionLink 9955583 - Disclosure - Capital Structure - Purchased Shares of its Common Stock, Including Commissions (Details) link:presentationLink link:calculationLink link:definitionLink 9955584 - Disclosure - Employee Benefit Plans - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955585 - Disclosure - Employee Benefit Plans - Summary of Change in Projected Benefit Obligation (Details) link:presentationLink link:calculationLink link:definitionLink 9955586 - Disclosure - Employee Benefit Plans - Net Period Benefit Costs (Details) link:presentationLink link:calculationLink link:definitionLink 9955587 - Disclosure - Employee Benefit Plans - Summary of Components of Actuarial Gain/(Loss) (Details) link:presentationLink link:calculationLink link:definitionLink 9955588 - Disclosure - Employee Benefit Plans - Summary of Weighted Average Actuarial Assumptions (Details) link:presentationLink link:calculationLink link:definitionLink 9955589 - Disclosure - Employee Benefit Plans - Summary of Expected Benefit Payments (Details) link:presentationLink link:calculationLink link:definitionLink 9955590 - Disclosure - Employee Benefit Plans - Contribution Plan (Details) link:presentationLink link:calculationLink link:definitionLink 9955591 - Disclosure - Leases - Supplemental Balance Sheet Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955592 - Disclosure - Leases - Components of Lease Cost (Details) link:presentationLink link:calculationLink link:definitionLink 9955593 - Disclosure - Leases - Supplemental Cash Flow Information Related to Leases (Details) link:presentationLink link:calculationLink link:definitionLink 9955594 - Disclosure - Leases - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955595 - Disclosure - Leases - Maturities of Lease Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955595 - Disclosure - Leases - Maturities of Lease Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955596 - Disclosure - Income Taxes - Summary of Components of Income / (Loss) Before Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9955597 - Disclosure - Income Taxes - Summary of Income Tax Expense / (Benefit) (Details) link:presentationLink link:calculationLink link:definitionLink 9955598 - Disclosure - Income Taxes - Summary of Income Taxes Recognized in Other Comprehensive Income (Details) link:presentationLink link:calculationLink link:definitionLink 9955599 - Disclosure - Income Taxes - Summary of Effective Income Tax Rate Differs from Amount Computed by Applying U.S. Federal Statutory Income Tax Rate to Income Before Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9955600 - Disclosure - Income Taxes - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955601 - Disclosure - Income Taxes - Summary of Components of Deferred Tax Balances (Details) link:presentationLink link:calculationLink link:definitionLink 9955602 - Disclosure - Income Taxes - Summary of Activity Related to Gross Unrecognized Tax Benefits (Details) link:presentationLink link:calculationLink link:definitionLink 9955603 - Disclosure - Stock-Based Compensation - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955604 - Disclosure - Stock-Based Compensation - Costs Related to Company's Stock Based Compensation Plan (Details) link:presentationLink link:calculationLink link:definitionLink 9955605 - Disclosure - Stock-Based Compensation - Stock Based Compensation Stock Option Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955606 - Disclosure - Stock-Based Compensation - Stock Options, Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955607 - Disclosure - Stock-Based Compensation - Schedule of Share-Based Compensation, Employee Stock Purchase Plan (Details) link:presentationLink link:calculationLink link:definitionLink 9955608 - Disclosure - Stock-Based Compensation - Stock Options Exercised (Details) link:presentationLink link:calculationLink link:definitionLink 9955609 - Disclosure - Stock-Based Comepnsation - Share Matching Program, Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955610 - Disclosure - Stock-Based Compensation - Restricted Stock Units Activity Under Company's Stock Plans (Details) link:presentationLink link:calculationLink link:definitionLink 9955611 - Disclosure - Stock-Based Compensation - Restricted Stock Units Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 9955612 - Disclosure - Stock-Based Compensation - Performance Based Stock Awards, Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955613 - Disclosure - Stock-Based Compensation - Summary of Weighted Average Valuation Assumptions for Market Condition Performance Restricted Stock Units (Details) link:presentationLink link:calculationLink link:definitionLink 9955614 - Disclosure - Stock-Based Compensation - Performance Restricted Stock Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955615 - 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