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Unvested, beginning of period (in dollars per share) Weighted average price per share, Unvested, end of period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Weighted average remaining contractual term, Unvested, end of period (in years) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms Weighted average price per share, Forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Weighted average exercise price, Exercised (in dollars per share) Weighted average of daily historical volatility of Company's stock price, weight (in hundredths) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate Granted (in shares) Expected dividend yield (in hundredths) Fair value of options vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Weighted average price per share, Vested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Exercisable, end of period (in shares) Stock Options, Additional [Abstract] Aggregate intrinsic value, Exercised Expected volatility (in hundredths) Average risk-free interest rate (in hundredths) Assumptions used to estimate fair value [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Weighted-average grant-date fair value of options granted (in dollars per share) Weighted average exercise price, Expired or cancelled (in dollars per share) Expired or cancelled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Weighted average exercise price, Outstanding, beginning of period (in dollars per share) Weighted average exercise price, Outstanding, end of period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Options outstanding and exercisable [Abstract] Weighted average exercise price, Exercisable, end of period (in dollars per share) Outstanding, end of period (in shares) Outstanding, beginning of period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] Vested or expected to vest, end of period (in shares) Aggregate intrinsic value, Outstanding, end of period Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Axis] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Domain] Stock Options, Shares [Roll forward] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Award Type [Domain] Weighted average exercise price, Vested or expected to vest, end of period (in dollars per share) Options outstanding, shares (in shares) Options exercisable, shares (in shares) Exercise price range, upper range limit (in dollars per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit Exercise price range, lower range limit (in dollars per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit Balance (in shares) Balance (in shares) Shares, Issued Short-term borrowings Short-term Debt Short-Term Debt [Abstract] Weighted-average interest rates (in hundredths) Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] U.S. State [Member] State and Local Jurisdiction [Member] Statement [Table] Statement [Line Items] CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY [Abstract] CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract] Statement, Geographical [Axis] Geographical [Axis] CONSOLIDATED STATEMENTS OF CASH FLOWS [Abstract] Statement, Equity Components [Axis] CONSOLIDATED BALANCE SHEETS [Abstract] Business Segments [Axis] Share Repurchase Programs, by Year [Axis] Class of Stock [Axis] Share-Based Awards [Member] Issuances under equity plans, including tax benefits (in shares) Shares authorized to be repurchased (in shares) Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Issuances under equity plans, including tax benefits Remaining number of shares authorized to be repurchased (in shares) Shareholders Equity SHAREHOLDERS' EQUITY: Shareholders' Equity [Abstract] Stockholders' Equity Attributable to Parent [Abstract] SHAREHOLDERS' EQUITY Balance Balance Stockholders' Equity Attributable to Parent Total shareholders' equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest SUBSEQUENT EVENTS Net investment hedges [Abstract] Net operating loss carryforwards Unrecognized tax benefit activity SUPPLEMENTAL CASH FLOW INFORMATION: Trade Names [Member] Trade Names [Member] ALLOWANCE FOR DOUBTFUL ACCOUNTS Translation adjustments on net investment hedge, net of income taxes of $20.3, $(5.4) and $(4.8), respectively Income tax expense (benefit) on translation adjustments on net investment hedge Derivatives used in Net Investment Hedge, Tax Benefit (Expense) Translation loss on net investment hedge, net of income taxes of $(16.4) and $(36.7), respectively Unrealized translation loss on net investment hedge included in accumulated other comprehensive (loss) income, net of taxes Repurchases of common stock Treasury Stock, Value, Acquired, Cost Method Shares repurchased (in shares) Treasury stock at cost (in shares) Treasury Stock [Member] Treasury stock at cost, 34,762,316 and 32,658,685 shares, respectively Treasury Stock, Value Total cost of shares repurchased Unremitted earnings of non-United States subsidiaries United States Plans [Member] United States Pension Plan of US Entity [Member] Potential interest and penalties Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Increases for current year tax positions Decreases in prior year tax positions Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Amount of unrecognized tax benefit that would affect the effective tax rate, if recognized Gross unrecognized tax benefits, end of year Gross unrecognized tax benefits, beginning of year Unrecognized Tax Benefits Increases in prior year tax positions Interest and penalties related to unrecognized tax benefits USE OF ESTIMATES SEC Schedule, Article 12-09, Valuation and Qualifying Accounts, Valuation and Qualifying Accounts Disclosure [Table] Valuation and Qualifying Accounts Disclosure [Table] Valuation Allowances and Reserves [Domain] Translation Adjustments Provisions Charged to Earnings Balance at Beginning of Year Balance at End of Year Valuation Allowances and Reserves, Balance Write-Offs Valuation Allowances and Reserves, Deductions Reclassifications and Other Schedule II VALUATION AND QUALIFYING ACCOUNTS [Abstract] Valuation and Qualifying Accounts Disclosure [Line Items] Valuation Allowances and Reserves Type [Axis] Weighted average shares - basic (in shares) Weighted-average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Weighted average shares - diluted (in shares) Weighted-average common shares outstanding - diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted France [Member] United Kingdom [Member] Italy [Member] Netherlands Norway [Member] United States [Member] United States [Member] Income Taxes, Deferred Tax Assets and Liabilities [Table] Presentation of deferred tax assets and liabilities on a current or noncurrent basis. Deferred Taxes, by Classification [Axis] Presentation of deferred tax assets and liabilities on a current or noncurrent basis. Deferred Taxes, by Classification [Domain] The noncurrent portion of the aggregate tax effects as of the balance sheet date of all future tax deductions arising from temporary differences between tax basis and generally accepted accounting principles basis recognition of assets, liabilities, revenues and expenses, which can only be deducted for tax purposes when permitted under enacted tax laws. Noncurrent [Member] The current portion of the aggregate tax effects as of the balance sheet date of all future tax deductions arising from temporary differences between tax basis and generally accepted accounting principles basis recognition of assets, liabilities, revenues and expenses, which can only be deducted for tax purposes when permitted under enacted tax laws. Current [Member] Income Taxes, Deferred Tax Assets and Liabilities [Line Items] The gross amount of decreases in unrecognized tax benefits resulting from lapses of the applicable statutes of limitations and from settlements with taxing authorities. Unrecognized tax benefits, reductions from expiration of statute of limitations and audit settlements Expiration of statute of limitations and audit settlements The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns including potential interest and penalties as of the balance sheet date. Unrecognized tax benefits including potential interest and penalties Balance, end of year Amount of income tax benefit included in non-United States tax rate difference related to the CICE payroll tax credits because it is tax-free for French tax purposes. Income tax benefit related to the CICE payroll tax credit Income tax benefit related to the CICE payroll tax credit Unrecognized Tax Benefits [Abstract] Tax benefits recognized relating to unrecognized tax benefits. Tax benefits relating to unrecognized tax benefits Expirations of Net Operating Loss Carryforwards [Abstract] For net operating loss carryforwards expiring within the fourth year following the balance sheet date. Net operating loss carryforwards expiring within four years 2018 For net operating loss carryforwards expiring within the second year following the balance sheet date. Net operating loss carryforwards expiration in two years 2016 For net operating loss carryforwards expiring within the fifth year following the balance sheet date. Net operating loss carryforward expiring within five years 2019 For net operating loss carryforwards expiring after the fifth year following the balance sheet date. Net operating loss carryforwards expiring after five years Thereafter For net operating loss carryforwards expiring within twelve months of the balance sheet date. Net operating loss carryforwards expiration within twelve months 2015 The group of designated tax departments of the governments that are entitled to levy and collect income taxes from the entity in or outside their countries of domicile. U S Federal and Non U S [Member] U.S. Federal and Non-U.S. [Member] For net operating loss carryforwards expiring within the third year following the balance sheet date. Net operating loss carryforward expiration within three years 2017 Amount of unremitted earnings of non-United States subsidiaries that may be remitted to the United States. Unremitted earnings of non-United States subsidiaries that may be remitted Sum of interest income and expense, foreign exchange gains and losses and other miscellaneous non-operating income and expenses. Interest And Other Nonoperating Expenses Interest and other expenses Interest and other expenses Interest and other expenses The aggregate total costs related to selling a firm's product and services, including all other general and administrative expenses but excluding goodwill and intangible asset impairment charges. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. Selling And Administrative Expenses Excluding Goodwill And Intangible Asset Impairment Charges Selling and administrative expenses Disclosure of accounting policy for payroll tax credit creditable against current income tax payable. PAYROLL TAX CREDIT, Policy [Policy Text Block] PAYROLL TAX CREDIT Amount of assets related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets. The economic benefit of these costs are expected to be realized within 12 months of the balance sheet date. Current Prepaid Expense and Other Assets Prepaid expenses and other assets Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors and temporary employees for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Accounts Payable And Accrued Temp Payroll Accounts payable Sum of the carrying values as of the balance sheet date of the obligations incurred through that date and payable for 1) permanent employees' services provided and 2) unused vacation time owed to employees based on the entity's vacation benefit given to its employees. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Accrued Salaries Current And Accrued Vacation Current Employee compensation payable The amount of adjustments to net income (loss) resulting from the assumption that dilutive convertible securities were converted. This amount excludes adjustments related to stock options. Dilutive Securities Effect On Basic Earnings Per Share Other Awards Effect of other share-based awards (in shares) Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of stock options using the treasury stock method. Incremental Common Shares Attributable to Stock Options Effect of dilutive securities - stock options (in shares) Refers to exercise prices for awards excluded from the calculation of net earnings per share. Antidilutive Securities Excluded from Computation of Earnings Per Share, Exercise price Exercise price range (in dollars per share) Refers to weighted average remaining contractual term for awards excluded from the calculation of net earnings per share. Antidilutive Securities Excluded from Computation of Earnings Per Share, Weighted average remaining life Weighted-average remaining life Net of tax and reclassification adjustments of the change in the balance sheet adjustment that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency of the reporting entity. Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Foreign currency translation adjustments The total cash inflow (outflow) associated with share-based award transactions not individually reported. Proceeds From Payments For Other Share Based Award Transactions Net Other share-based award transactions, net Payroll Tax Credit [Abstract] Investment in debt and equity securities that are categorized as neither held-to-maturity or trading, associated with a Swiss franchise in which we hold a 49 percent interest. Swiss Franchise Investment Market Value Multiplier to the French minimum wage for the purpose of determining eligibility for the French payroll tax credit. Credit d'Impot pur la Competitive et l'Emploi ("CICE"), French legislation, provides payroll tax credit on a percentage of wages paid to employees receiving less than this number times the French minimum wage. Multiplier for payroll tax credits Capitalized software for internal use [Abstract] The minimum useful life of capitalized software used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Capitalized Software, Useful Life, Minimum Revenues and receivables [Abstract] The maximum useful life of capitalized software used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Capitalized Software, Useful Life, Maximum Sum of the gross amounts (original costs for current and prior period additions adjusted for impairment, if any) as of the balance sheet date of intangible assets, excluding goodwill, having a projected indefinite period of benefit. Indefinite Lived Intangible Assets (Excluding Goodwill), Gross Indefinite-Lived Intangible Assets (Excluding Goodwill), Gross Represents the amount of accumulated amortization on infinite intangible assets as of the balance sheet date. Accumulated Amortization on Infinite Intangible Assets Indefinite-Lived intangible assets, Accumulated Amortization Basis of consolidation [Abstract] The minimum percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. Equity Method Investment Ownership Percentage, minimum Ownership interest to qualify for equity method, minimum (in hundredths) Long lived, depreciable assets, commonly used in offices and stores and autos. Furniture, Fixtures and Autos [Member] The carry-forward period after which the remaining CICE payroll tax credit will be paid. Payment period of the CICE payroll tax credit Represents treasury stock transactions made under the 2007 Share Repurchase authorization by the Board of Directors. Common Stock Repurchase 2007 Authorization [Member] Authorized in 2007 [Member] The share repurchase program authorized in 2013. Authorized in 2013 [Member] Represents treasury stock transactions made under the 2010 Share Repurchase authorization by the Board of Directors. Common Stock Repurchase 2010 Authorization [Member] Authorized in 2010 [Member] Represents treasury stock transactions made under the 2011 Share Repurchase authorization by the Board of Directors. Common Stock Repurchase 2011 Authorization [Member] Authorized in 2011 [Member] The share repurchase program authorized in 2012. Authorized in 2012 [Member] Weight of income approach in determining the fair value of goodwill for impairment for certain of the Company's reporting units. Income approach weight for goodwill impairment for certain reporting units Income approach weight for goodwill impairment for certain reporting units (in hundredths) Weight of market approach in determining the fair value of goodwill for impairment for certain of the Company's reporting units. Market approach weight for goodwill impairment for certain reporting units Market approach weight for goodwill impairment for certain reporting units (in hundredths) Nature of operations [Abstract] The number of countries and territories in which the entity operates as of balance sheet date. Number of Countries and Territories in which Entity Operates Number of countries and territories Intangible Assets, Accumulated Amortization (Excluding Goodwill), Total. Intangible Assets, Accumulated Amortization (Excluding Goodwill), Total Accumulated amortization of goodwill. Goodwill, accumulated amortization Accumulated Amortization The number of offices in which the entity operates as of balance sheet date. Number Of Offices In Which Entity Operates Number of offices worldwide The rights we reacquired through business combinations that we had previously granted to the franchisees (acquirees) to use our trade name under a franchise agreement. Prior to 2009, these rights were considered indefinite-lived. Reacquired Franchise Rights [Member] Gross amount, as of the balance sheet date, of the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions. Gross Goodwill Goodwill, Gross The share repurchase program authorized in 2014. Authorized in 2014 [Member] Percentage to be applied to the eligible wages for calculation of the CICE payroll tax credit. CICE payroll tax credit Percentage of eligible wages for tax credit (in hundredths) The accumulated impairment losses related to indefinite-lived intangible assets (excluding goodwill) as of the balance sheet date. Indefinite Lived Intangible Assets (Excluding Goodwill), Impaired, Accumulated Impairment Loss Accumulated Impairment Loss Segment information pertaining to APME. APME [Member] APME Reportable Segment [Member] Segment information pertaining to Right Management. Right Management [Member] Right Management Reportable Segment [Member] Segment information pertaining to Northern Europe. Northern Europe [Member] Northern Europe Reportable Segment [Member] Segment information pertaining to Southern Europe. Southern Europe [Member] Southern Europe Reportable Segment [Member] The charge against earnings in the period for known and estimated costs of termination benefits provided to employees that are involuntarily terminated under a benefit arrangement associated with exit from/disposal of business activities/restructurings pursuant to a duly authorized plan, excluding costs/losses pertaining to an entity newly acquired in a business combination or a discontinued operation as defined by GAAP and costs associated with one-time termination benefits. The expense is net of reversals. Severance Costs Net Severance costs, net The charge against earnings in the period for known and estimated costs of consolidating or closing facilities and termination of an operating lease. The expense is net of reversals. Office Closure Costs Office closure costs, net Information pertaining to acquisition of Damilo Group a French firm specializing in IT design solutions. Damilo Group [Member] Information pertaining to acquisition of Proservia SA. Proservia Sa [Member] Proservia SA [Member] The entire disclosure for interest income and expense, foreign exchange gains and losses and other miscellaneous non-operating income and expenses. Interest And Other Expenses [Text Block] Interest and Other Expenses EUR 350M aggregate principal amount notes. Euro denominated Notes Tranche 3 [Member] Euro 350 Due June 2018 [Member] Minimum fixed charge coverage ratio as per restrictive covenant terms. Fixed Charge Coverage Ratio, Minimum Ratio that indicates a firm's ability to satisfy fixed financing expenses such as interest and leases. Fixed Charge Coverage Ratio A measure of a company's ability to pay off its incurred debt. Debt to EBITDA Impact of downgrades from credit rating agencies on facility fees Expected Additional Cost Resulting From Downgrades Impact of downgrades from credit rating agencies on facility fees Maximum debt to EBITDA ratio as per covenant terms. Debt to EBITDA Ratio, Maximum Uncommitted credit lines for working capital needs of subsidiaries. Uncommitted Credit Lines [Member] The debt discount is the percentage of the face amount at which the notes were issued. Discounted issue price Discounted issue price (in hundredths) Other long-term debt not otherwise identified. Other Debt [Member] Other [Member] Interest income received from interest bearing assets. The balance includes income earned in return for depositing or lending money that can include income from time deposits, demand deposits, saving accounts, certificates of deposit, money market deposits, bonds, and loans. Interest Income Interest income Plan with accumulated benefit obligations in excess of fair value of plan assets [Abstract] Plans with accumulated benefit obligations in excess of fair value of plan assets [Abstract] This category includes investments in debt securities issued by U.S. Treasury/ Federal agency and foreign governments. Fixed Income Securities, Government Bonds [Member] This category includes ownership interest in United States corporations. Equity Securities U S Companies [Member] Equity Securities, United States Companies [Member] This category includes ownership interest in international corporations. Equity Securities, International Companies [Member] Plans with accumulated benefit obligations [Abstract] Plans with accumulated benefit obligations [Abstract] An assumption as to the highest rate of return on non-U.S. plan assets reflecting the rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation. Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets Maximum Expected long-term rate of return, non-U.S., highest (in hundredths) Number of defined benefit plans using guaranteed insurance contracts. Defined Benefit Plan Number Of Plans Using Guaranteed Insurance Contracts Number of foreign plans using guaranteed insurance contracts Defined Benefit Plan Fair Value Of Plan Assets By Asset Category [Abstract] Fair value of pension plan assets by asset category [Abstract] A contract promising a stated nominal interest rate over some specific time period, usually several years. Fixed Income Securities, Guaranteed Insurance Contracts [Member] Amount of net gain (loss) expected to be recognized in net periodic benefit cost due to settlements and curtailments over the next twelve months. Curtailments result from an event that significantly reduces the expected years of future service of present employees or eliminates for a significant number of employees the accrual of defined benefits for some or all of their future services. Settlements result from an irrevocable action that relieves the employer (or the plan) of primary responsibility for a benefit obligation and eliminates significant risks related to the obligation and the assets used to effect the settlement. Examples of transactions that constitute a settlement include, but are not limited to, lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contracts to cover vested benefits. Defined Benefit Plan Expected To Be Recognized Net Gain Loss Due To Settlements And Curtailments Expected to be recognized net gain due to settlements and curtailments during next fiscal year This category includes ownership interest in annuity contract. Annuity contract [Member] Annuity Contract [Member] This category includes ownership interest in insurance contract. Insurance Contract [Member] An assumption as to the lowest rate of return on non-U.S. plan assets reflecting the rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation. Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets Minimum Expected long-term rate of return, non-U.S., lowest (in hundredths) A fund structure that allows investors to pool assets while retaining individual net asset values for each participant and keeping track of historical fund records. Each investor in the fund is accounted for separately and has their own unit - their own class of shares of the portfolio's total assets. Unitized Funds [Member] Total amounts recognized in in net periodic benefit cost and other comprehensive income, including the net gain (loss) and net prior service cost (credit) arising during the period. Defined Benefit Plans Total Amounts Recognized In Net Periodic Benefit Cost And Other Comprehensive Income Loss Before Tax Period Increase Decrease Total recognized in net periodic benefit cost and other comprehensive loss The total amount of the aggregate benefits expected to be paid. Defined Benefit Plan Expected Future Benefit Payments Total Total projected benefit payments For defined benefit pension plans, the actuarial present value of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date for the plans that do not have plan assets. Defined Benefit Plan Accumulated Benefit Obligation For Plans That Do Not Have Plan Assets Accumulated benefit obligation for plans that do not have plan assets Aggregate carrying value as of the balance sheet date of the assets and liabilities for significant deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date. Deferred Compensation Plans, Asset Liability Deferred compensation plans, asset and liability Plan that defines the amount of pension benefit to be provided, usually as a function of one or more factors such as age, years of service or compensation. Also includes a plan that defines postretirement benefits in terms of monetary amounts (for example, $100,000 of life insurance) or benefit coverage to be provided (for example, up to $200 per day for hospitalization, 80 percent of the cost of specified surgical procedures, and so forth). Any postretirement benefit plan that is not a defined contribution postretirement plan is a defined benefit postretirement plan. Defined Benefit Pension Plans and Retiree Health Care Plan [Member] Per share amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations. Reorganization costs per diluted share Restructuring costs per diluted share (in dollars per share) Market price [Abstract] Market price [Abstract] Market price of shares traded on an exchange, Low. Market price of shares traded on an exchange, Low Low (in dollars per share) Market price of shares traded on an exchange, High. Market price of shares traded on an exchange, High High (in dollars per share) In the event the performance criteria falls below the target performance level, a reduced number of shares, as low as the Threshold Award level, may be granted. Threshold Award In the event the performance criteria meets the target performance level, the number of shares, up to the Target Award level, may be granted. Target Award In the event the performance criteria exceeds the target performance level, an additional number of shares, up to the Outstanding Award level, may be granted. Outstanding Award Awards granted in 2012. Granted 2012 [Member] 2012 [Member] Awards granted in July 2012 and February 2013. Granted July 2012 and February 2013 [Member] July 2012 and February 2013 [Member] Deferred Stock [Abstract] The weight of the implied volatility based on the exchange traded options for the Company's common stock used in the fair value assumptions of the stock options granted. Share based Compensation Arrangement by Share based Payment Award Fair Value Assumptions Implied Volatility Stock Options Weight Implied volatility based on exchange traded options for Company's common stock, weight (in hundredths) Term of securities considered in risk-free interest rate assumption. Risk Free Interest Rate Term Risk-free interest rate term The number of grants made at period end on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period1 Stock units granted at period end (in shares) Other Stock Plans [Abstract] Awards granted in 2013. Granted 2013 [Member] 2013 [Member] Awards granted in 2014. Granted 2014 [Member] 2014 [Member] As of the balance sheet date, the total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices of nonvested equity instruments other than options outstanding. Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Outstanding Aggregate Intrinsic Value Aggregate intrinsic value, Unvested, end of period Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition. Possible Vesting Period Term Possible vesting period term The payroll deduction period over which specified payroll deductions are made to accumulate funds used for share-based payment award. Share Based Compensation Arrangement By Share Based Payment Award Payroll Deduction Period Payroll deduction period to accumulate funds used for share-based payment award (in months) Payout Levels [Abstract] Payout Levels (in units): Maximum term required for the restrictions to lapse on restricted stock. Term for restrictions to lapse Maximum term for restrictions to lapse Performance Share Units [Abstract] Performance Share Units Detail [Abstract] Vesting dates over which an employee's right to exercise an award is no longer contingent on satisfaction of performance condition. Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Date Vesting Date(s) Award payout percentage of performance target Award Payout Percentage of Performance Target Award payout percentage of performance target (in hundredths) Number of shares under an equity-based award plan, other than a stock option plan, that were issued during the reporting period. Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Issued In Period Shares Issued in 2014 Number of shares under an equity-based award plan, other than a stock option plan, that were forfeited during the reporting period. Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period1 Units Forfeited in 2014 (at Target Award level) Performance term considered in granting performance share units. Performance period range Grant date of equity-based payment instruments, excluding stock (or unit) options. Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants Date Grant Date Represents the period over which Operating Profit Margin performance will be measured in order to determine award levels in relation to performance share units granted. Performance period Stock units that are deferred. Deferred Stock [Member] A stock plan which offers employees the opportunity to obtain an option for a specified number of shares of common stock at not less than 85% of its market value on the day prior to the offer to participate in the plan. U K Savings Related Share Option Scheme [Member] U. K. Savings Related Share Option Scheme [Member] The minimum purchase price of stock purchase options expressed as a percentage of the fair market value. Share Based Compensation Arrangement By Share Based Payment Award Options Purchase Price Percentage Of Fair Market Value, Minimum Purchase price, minimum (in hundredths) Stock options outstanding and exercisable with exercise price range of $45 to $55 per share. Range Three [Member] Exercise Price $45 - $55 [Member] Stock options outstanding and exercisable with exercise price range of $56 to $93 per share. Range Four [Member] Exercise Price $56 - $93 [Member] Stock options outstanding and exercisable with exercise price range of $26 to $34 per share. Range One [Member] Exercise Price $27 - $34 [Member] Number of shares under an equity-based award plan, other than a stock option plan, that are subject to holding. Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Subject To Holding Shares Subject to Holding Period as of December 31, 2014 Deferred stock units issued in lieu of the annual cash retainer to non-employee directors. In Lieu of Annual Cash Retainer [Member] Deferred stock units issued to non-employee directors as additional compensation for board service. Additional Compensation for Board Service [Member] Stock options outstanding and exercisable with exercise price range of $35 to $44 per share. Range Two [Member] Exercise Price $35 - $44 [Member] A stock plan under which designated employees meeting certain service requirements may purchase shares of the Company's common stock through payroll deductions. Employee Stock Purchase Plan [Member] 2011 Equity Incentive Plan [Member] The after tax total of net gain (loss), prior service cost (credit) and transition assets (obligations) included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost. Defined Benefit Plan Accumulated Other Comprehensive Income After Tax Defined benefit plans Tax effect on gross change in value of the total of unsold securities. Accumulated Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax Unrealized gain on investments, taxes Tax effect of current period adjustment resulting from gains and losses on foreign currency transactions that are designated as, and are effective as, economic hedges of a net investment in a foreign entity. Accumulated Other Comprehensive Income Translation Loss on Net Investment Hedge, Tax Translation loss on net investment hedge, taxes Tax effects on the portion of unrecognized costs/benefit related to defined benefit plans included in accumulated comprehensive income. Accuulated Other Comprehensive Income Defined Benefit Plans Tax Defined benefit plan, taxes An obligation resulting from borrowing money. Euro denominated Note EUR200 [Member] Euro-Denominated Note EUR200 [Member] An obligation resulting from borrowing money. Euro denominated Note EUR300 [Member] Euro-Denominated Note EUR350 [Member] Tabular disclosure of goodwill balances by reporting unit. Goodwill Balances By Reporting Unit [Table Text Block] Goodwill balances by reporting unit Information pertaining to Jefferson Wells. Jefferson Wells [Member] Information by name of reporting units. Reporting Unit [Axis] Name of reporting units. Reporting Unit [Domain] The name of a geographic segment representing facts about a reporting entity disaggregated by the geographic area of the entities activities. Netherlands (Vitae) [Member] Netherlands [Member] Operating unit profit (loss) is equal to segment revenues less cost of services and branch and national headquarters operating costs. This profit measure does not include goodwill and intangible asset impairment charges or amortization of intangibles related to acquisitions, interest and other income and expense amounts or income taxes. Operating Unit Profit (loss) Operating Unit Profit Other segment disclosures [Abstract] Represents corporate amounts not allocated to segments. Corporate reportable segment [Member] Corporate Expenses Reportable Segment [Member] Segment information related to the Americas excluding the United States reportable segment. Other Americas reportable segment [Member] Other Americas [Member] Geographical information pertaining to all the business activities outside the United States. Total Foreign [Member] Segment information related to the Southern Europe segment excluding France and Italy reportable segments. Other Southern Europe reportable segment [Member] Other Southern Europe [Member] Refers to corporate assets include assets that were not used in the operations of any segment, the most significant of which were purchased intangibles and cash. Additions [Member] The amount of consideration to which the entity agreed to pay in a settlement agreement which resolved the legal matter. Settlement agreement Agreement reached between parties in a litigation that occurs without judicial intervention, supervision or approval. Settlement Agreement 2 [Member] 2012 Class Action Lawsuit [Member] Document and Entity Information [Abstract] Tabular disclosure of threshold, target and outstanding award levels for each outstanding grant of performance share units. Performance share units detail by grant year [Table Text Block] Performance share units detail by grant year