Accounting Policies [Abstract] Accounting Policies [Abstract] Accounts Payable Current Accounts payable Accounts Receivable Net Current Accounts receivable, net Accrued Income Taxes Current Income taxes payable Accrued Income Taxes Noncurrent Non-current income taxes payable Accumulated Other Comprehensive Income Loss Net Of Tax Accumulated other comprehensive income Accumulated Other Comprehensive Income [Member] Accumulated Other Comprehensive Income Additional Paid In Capital Common Stock Additional paid-in capital Additional Paid In Capital [Member] Additional Paid-in Capital Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value Non-cash stock compensation expense Adjustments To Additional Paid In Capital Stock Issued Issuance Costs Share issuance costs Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation Tax benefit on exercise of options Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Adjustment to Retained Earning Share Repurchase costs Adjustment To Retained Earning Share Repurchase Costs Share repurchase costs Amendment Flag Amendment Flag Amortization Of Intangible Assets Amortization of intangibles Aptiv Solutions [Member] Aptiv Solutions [Member] Aptiv Solutions Assets Assets Total Assets Assets [Abstract] ASSETS Assets Current Total current assets Assets Current [Abstract] Current Assets: Assets Noncurrent [Abstract] Other Assets: Available For Sale Securities Debt Securities Current Short term investments - available for sale Award Type [Axis] Award Type Business Acquisition Acquiree [Domain] Business Acquisition, Acquiree [Domain] Business Acquisition [Axis] Business Acquisition Business Acquisition [Line Items] Business Acquisition [Line Items] Business Acquisition Percentage Of Voting Interests Acquired Percentage of common stock acquired Business Acquisition Purchase Price Allocation Working Capital Business Acquisition Purchase Price Allocation Working Capital Working capital adjustment Working capital adjustment Business Combination Consideration Transferred 1 Cash consideration Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability 1 Adjustments to cash consideration Adjustments to cash consideration Business Combination Contingent Consideration Liability Additional consideration Business Combination Disclosure [Text Block] Business Combinations Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Cash And Equivalents Cash and cash equivalents Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Prepaid Expense And Other Assets Prepayments and other current assets Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Receivables Accounts receivable Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities Accounts Payable Payments on account Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities Other Other liabilities Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangibles Intangible asset Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Noncurrent Liabilities Other Non-current other liabilities Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Other Noncurrent Assets Non-current assets Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Property Plant And Equipment Property, plant and equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Unbilled Revenue Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Unbilled Revenue Unbilled revenue Business Combination Recognized Identifiable Assets Acquired Goodwill And Liabilities Assumed Net Net assets acquired Net assets acquired Business Combinations [Abstract] Business Combinations [Abstract] Noncurrent capital government grants, which are amortized and recognized in earnings over the grant period. Capital Government Grants Noncurrent Non-current government grants Capital Redemption Reserve Capital Redemption Reserve Capital redemption reserve Capital Redemption Reserve Capital Redemption Reserve [Member] Capital Redemption Reserve Cash Acquired From Acquisition Cash acquired with subsidiary undertakings Cash And Cash Equivalents At Carrying Value Cash and cash equivalents at end of period Cash and cash equivalents at beginning of period Cash and cash equivalents Cash And Cash Equivalents Period Increase Decrease Net decrease in cash and cash equivalents Clinical trial services [Member] Clinical Trial Services [Member] Clinical Trial Services Common Stock [Member] Ordinary Shares Common Stock Par Or Stated Value Per Share Ordinary shares, par value Common Stock Shares Authorized Ordinary shares, shares authorized Common Stock Shares Issued Balance (in shares) Balance (in shares) Ordinary shares, shares issued Common Stock Shares Outstanding Ordinary shares, shares outstanding Common Stock Value Ordinary shares, par value 6 euro cents per share; 100,000,000 shares authorized, 61,897,155 shares issued and outstanding at June 30, 2014 and 61,587,257 shares issued and outstanding at December 31, 2013 Compensation Related Costs Share Based Payments Disclosure [Line Items] Compensation Related Costs Share Based Payments Disclosure [Line Items] Compensation Related Costs Share Based Payments Disclosure [Line Items] Compensation Related Costs Share Based Payments Disclosure [Table] Compensation Related Costs Share Based Payments Disclosure [Table] Compensation Related Costs Share Based Payments Disclosure [Table] Comprehensive Income Net Of Tax Total comprehensive income Comprehensive Income Net Of Tax [Abstract] Comprehensive Income: Contracts Revenue Gross revenue Cost Of Goods And Services Sold Direct costs Cost Of Reimbursable Expense Reimbursable expenses Cost Of Revenue [Abstract] Costs and expenses: Cost Of Sales [Member] Direct costs Costs And Expenses Total costs and expenses Current Fiscal Year End Date Current Fiscal Year End Date Customer Relationships [Member] Customer relationships acquired Deferred Income Taxes And Tax Credits Deferred taxes Deferred Revenue Current Payments on account Deferred Tax Assets Net Current Deferred tax asset Deferred Tax Assets Net Noncurrent Non-current deferred tax asset Deferred Tax Liabilities Noncurrent Non-current deferred tax liability Depreciation Depreciation expense Depreciation And Amortization Depreciation and amortization Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Disclosure Of Compensation Related Costs Share Based Payments [Text Block] Share-based Awards Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Document Fiscal Year Focus Document Fiscal Year Focus Document Information [Line Items] Document Information [Line Items] Document Information [Table] Document Information [Table] Document Period End Date Document Period End Date Document Type Document Type Earnings Per Share [Abstract] Net income per Ordinary Share: Earnings Per Share Basic Basic Earnings Per Share Diluted Diluted Earnings Per Share [Text Block] Net income per ordinary share Effect Of Exchange Rate On Cash And Cash Equivalents Effect of exchange rate movements on cash Employee [Member] Employee [Member] Individual Employee Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Non-cash stock compensation expense not yet recognized Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition 1 Unrecognized stock-based compensation expense, weighted average period (years) Employee Stock Option [Member] Employee Stock Option Employee Stock Ownership Plan E S O P Disclosures [Line Items] Employee Stock Ownership Plan (ESOP) Disclosures [Line Items] Employee Stock Plan, 2008 Plan [Member] Employee Stock Plan Twenty Zero Eight Plan [Member] Employee Stock Plan, 2008 Plan Employee Stock Plan, 2003 Plan [Member] Employee Stock Plan Twenty Zero Three Plan [Member] Employee Stock Plan, 2003 Plan Entity Central Index Key Entity Central Index Key Entity [Domain] Entity [Domain] Entity Registrant Name Entity Registrant Name Equity [Abstract] Equity [Abstract] Equity Component [Domain] Equity Component [Domain] Excess Tax Benefit From Share Based Compensation Financing Activities Tax benefit from the exercise of share options Finite Lived Intangible Assets By Major Class [Axis] Finite-Lived Intangible Assets by Major Class Finite Lived Intangible Assets Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite Lived Intangible Assets Net Intangible assets First Quarter Twenty Thirteen Restructuring Plan [Member] First Quarter Twenty Thirteen Restructuring Plan [Member] 1st Quarter 2013 Restructuring Plan Gain Loss On Sale Of Property Plant Equipment Loss on disposal of property, plant and equipment Goodwill Closing balance Opening balance Goodwill Goodwill Acquired During Period Current period acquisitions Goodwill And Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill Disclosure [Text Block] Goodwill Goodwill [Line Items] Goodwill [Line Items] Goodwill Translation Adjustments Foreign exchange movement I E Ireland Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments Income before provision for income taxes Income Statement [Abstract] Income Statement [Abstract] Income Statement Location [Axis] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs, by Report Line Income Statement Location [Domain] Income Statement Location [Domain] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Income Tax Disclosure [Text Block] Income Taxes Income Taxes Receivable Income taxes receivable Income Taxes Receivable Noncurrent Non-current income taxes receivable Income Tax Expense Benefit Provision for income taxes after restructuring and other items Provision for income taxes Income Tax Expense (Benefit) Before Nonrecurring Charges Income Tax Expense Benefit Before Nonrecurring Charges Provision for income taxes before restructuring and other items Income Tax Expense (Benefit) For Nonrecurring Charges, Tax Income Tax Expense Benefit For Nonrecurring Charges Tax Tax impact of restructuring and other items Increase Decrease In Accounts Payable (Decrease)/increase in accounts payable Increase Decrease In Accounts Receivable Increase in accounts receivable Increase Decrease In Accrued Income Taxes Payable Decrease in income taxes payable Increase Decrease In Deferred Revenue (Decrease) /increase in payments on account Increase Decrease In Operating Capital [Abstract] Changes in assets and liabilities: Increase Decrease In Other Current Liabilities (Decrease)/increase in other current liabilities Increase Decrease In Other Noncurrent Assets Increase in other non current assets Increase Decrease In Other Noncurrent Liabilities Increase in other non-current liabilities Increase Decrease In Other Receivables Increase in other receivables Increase Decrease In Prepaid Deferred Expense And Other Assets Increase in prepayments and other current assets Increase Decrease In Restricted Cash Change in restricted cash, net Increase Decrease In Unbilled Receivables Increase in unbilled revenue Interest Expense Debt Interest expense Investment Income Interest Interest income Legal Entity [Axis] Legal Entity [Axis] Liabilities And Stockholders Equity Total Liabilities and Shareholders' Equity Liabilities And Stockholders Equity [Abstract] LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities Current Total current liabilities Liabilities Current [Abstract] Current Liabilities: Liabilities Noncurrent [Abstract] Other Liabilities: Long Lived Assets By Geographic Areas Table [Text Block] Distribution of Property, Plant and Equipment, Net, by Geographical Area Maximum [Member] Maximum Minimum [Member] Minimum Net Cash Provided By Used In Financing Activities Net cash provided by financing activities Net Cash Provided By Used In Financing Activities [Abstract] Cash flows from financing activities: Net Cash Provided By Used In Investing Activities Net cash used in investing activities Net Cash Provided By Used In Investing Activities [Abstract] Cash flows from investing activities: Net Cash Provided By Used In Operating Activities Net cash (used in)/provided by operating activities Net Cash Provided By Used In Operating Activities [Abstract] Cash flows from operating activities: Net Income Loss Net income Net income Nontrade Receivables Current Other receivables Office Consolidations [Member] Office Consolidations [Member] Office Consolidations Open Tax Year Tax year subject to examination by major tax jurisdictions Operating Income by Geography. Operating Income By Geography Table [Text Block] Distribution of Income from Operations by Geographical Area Operating Income Loss Income from operations Income from operations Operating Income Loss Before Restructuring Charges Operating Income Loss Before Restructuring Charges Income from operations, excluding restructuring and other items Order Or Production Backlog [Member] Order Backlog Organization Consolidation And Presentation Of Financial Statements Disclosure [Text Block] Basis of Presentation Other Assets Noncurrent Non-current other assets Adjustment that results from the process of translating the impact of long-term funding into the functional currency of the reporting entity. Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Before Tax Long Term Funding Currency impact of long term funding Tax impact on the adjustment that results from the process of translating the impact of long-term funding into the functional currency of the reporting entity. Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Long Term Funding Tax Tax on currency impact of long term funding Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax Currency translation adjustment Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax Unrealized capital gain - investments Other Countries [Member] Other Countries [Member] Rest of World Other Liabilities Current Other liabilities Other Liabilities Noncurrent Non-current other liabilities Payments For Repurchase Of Common Stock Repurchase of ordinary shares Payments For Restructuring Cash payments Payments for Share Repurchase Costs Payments For Share Repurchase Costs Share repurchase costs Payments Of Stock Issuance Costs Share issuance costs Payments To Acquire Businesses Gross Purchase of subsidiary undertakings Payments To Acquire Property Plant And Equipment Purchase of property, plant and equipment Payments To Acquire Short Term Investments Purchase of short term investments Performance Based Grants [Member] Performance Based Grants [Member] PSUs Based on Service and EPS Targets Performance Share Unit [Member] Performance Share Unit [Member] Performance Share Unit (PSUs) Plan Name [Axis] Plan Name Plan Name [Domain] Plan Name [Domain] Prepaid Expense And Other Assets Current Prepayments and other current assets Proceeds From Sale Of Short Term Investments Sale of short term investments Proceeds From Stock Options Exercised Proceeds from exercise of share options Property Plant And Equipment Net Property, plant and equipment, net Range [Axis] Range Range [Member] Range [Domain] Reconciliation Of Assets From Segment To Consolidated [Text Block] Distribution of Total Assets by Geographical Area Reconciliation of Provision of Income Taxes [Line Items] Reconciliation Of Provision Of Income Taxes [Line Items] Reconciliation of Provision of Income Taxes [Line Items] Reconciliation of Provision of Income Taxes [Table] Reconciliation Of Provision Of Income Taxes [Table] Reconciliation of Provision of Income Taxes [Table] Amortization of Government Grants. Recovery Of Amortization Of Government Grants Amortization of grants Rest Of Europe [Member] Rest Of Europe [Member] Rest Of Europe Restricted Stock Units R S U [Member] Restricted Stock Units (RSUs) Restricted Stock Units Twenty Thirteen [Member] Restricted Stock Units Twenty Thirteen [Member] Restricted Stock Units 2013 Restricted Stock Units Twenty Zero Eight [Member] Restricted Stock Units Twenty Zero Eight [Member] Restricted Stock Units 2008