Accounts receivable, less allowance for doubtful accounts of $112.3 and $111.6, respectively Accumulated Amortization on Intangible Assets Accumulated Amortization Accumulated other comprehensive income Accumulated other comprehensive income (loss) Components of Accumulated Other Comprehensive Income (Loss), net of tax [Abstract] Less: accumulated depreciation and amortization Acquisitions of businesses, net of cash acquired Amount of cash consideration paid for acquisitions Payments to Acquire Businesses, Net of Cash Acquired Capital in excess of par value Capital expenditures Payments to Acquire Productive Assets Allowance for doubtful accounts Stock-based awards [Member] Consolidated Balance Sheets (Unaudited) [Abstract] Consolidated Balance Sheets (Unaudited) Parenthetical [Abstract] Net earnings per share - basic Net earnings / (loss) per share - basic (in dollars per share) Earnings Per Share, Basic Total purchase price Acquisition date Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition [Line Items] Business Acquisition, Pro Forma Statement of Operations Business Acquisition, Pro Forma Information [Table Text Block] Schedule of Business Acquisitions, by Acquisition [Table] Acquisitions [Table] Cash and cash equivalents Cash and cash equivalents, beginning of year Cash and cash equivalents, end of period Costs paid or utilized Payments for Restructuring Interest paid Accounts receivable Increase (Decrease) in Accounts Receivable Net change in short-term borrowings Changes in operating assets and liabilities, excluding the impact of acquisitions: Contingencies Commitments and Contingencies Disclosure [Text Block] Common stock, authorized (in shares) Common stock, issued (in shares) Common stock, $.01 par value, authorized 125,000,000 shares, issued 108,799,698 and 108,294,605 shares, respectively Cost of services Foreign currency translation gain (loss) Total current liabilities Liabilities, Current CURRENT LIABILITIES: Short-term borrowings and current maturities of long-term debt Future income tax benefits Defined Benefit Plans and Other Postretirement Benefit Plans [Domain] Derivative, Name [Domain] Derivative, by Nature [Axis] Derivative Financial Instruments and Fair Value Measurements Net earnings per share - diluted Net earnings per share - diluted (in dollars per share) Earnings Per Share, Diluted Dividend Declared [Member] Effect of exchange rate changes on cash Effective income tax rate U.S. Federal statutory rate Share-based compensation Share-based compensation expense Estimated amortization expense, Year 5 Estimated amortization expense, Year 4 Estimated amortization expense, Year 1 Estimated amortization expense, Year 3 Estimated amortization expense, Year 2 Goodwill Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Goodwill [Line Items] Schedule of Goodwill [Table] Gross profit Gross Profit Consolidated Statements Of Operations (Unaudited) [Abstract] Income Statement [Abstract] Income Tax Contingency [Line Items] Income Tax Contingency [Table] Related tax benefits Income Tax Examination, Liability (Refund) Adjustment from Settlement with Taxing Authority Income Taxes Income Tax Disclosure [Text Block] Interest and penalties Income taxes paid Other assets Increase (Decrease) in Other Operating Assets Intangible assets, less accumulated amortization of $166.6 and $138.1, respectively Net Goodwill Balance, beginning of period Balance, end of period Goodwill Interest expense Total liabilities and shareholders' equity Liabilities and Equity Long-term debt Long-term Debt, Excluding Current Maturities Fine levied and paid related to competition investigation Cash used in financing activities Net Cash Provided by (Used in) Financing Activities CASH FLOWS FROM FINANCING ACTIVITIES: Cash used in investing activities Net Cash Provided by (Used in) Investing Activities CASH FLOWS FROM INVESTING ACTIVITIES: Cash used in operating activities Net Cash Provided by (Used in) Operating Activities CASH FLOWS FROM OPERATING ACTIVITIES: Change in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements [Line Items] New accounting pronouncement, description New accounting pronouncement, name Recently Issued Accounting Standards Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements [Table] Total other assets Assets, Noncurrent OTHER ASSETS: Total other liabilities Liabilities, Noncurrent OTHER LIABILITIES: Operating profit Operating profit (loss) Operating Income (Loss) Unrealized gain (loss) on investments Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Foreign currency translation gain (loss) Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Other comprehensive income (loss) [Abstract] Other Comprehensive Income (Loss), Net of Tax [Abstract] Miscellaneous expenses, net Interest and Other Expenses [Abstract] Interest and Other Expenses [Abstract] Other Nonoperating Income (Expense) [Abstract] Retiree Health Care Plan [Member] Contributions to retiree health care plan Contributions to pension plans Retirement Plans Pension and Other Postretirement Benefits Disclosure [Text Block] Defined Benefit Pension Plans [Member] Expected return on assets Defined Benefit Plan, Expected Return on Plan Assets Deferred compensation plan assets Interest cost Total benefit cost Defined Benefit Plan, Net Periodic Benefit Cost Service cost Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Axis] Defined Benefit Plan Disclosure [Line Items] Schedule of Defined Benefit Plans Disclosures [Table] Preferred stock, authorized (in shares) Preferred stock, issued (in shares) Preferred stock, par value (in dollars per share) Proceeds from long-term debt Proceeds from the sale of property and equipment Land, buildings, leasehold improvements and equipment Net property and equipment Property, Plant and Equipment, Net Provision for doubtful accounts Repayments of long-term debt Repayments of Long-term Debt Net reorganization costs Reorganization Costs Restructuring and Related Activities Disclosure [Text Block] Beginning balance Ending balance Restructuring Reserve Retained earnings Franchise fees Consideration received from stock-based awards Revenues from services Retirement Plans Goodwill Schedule of Goodwill [Table Text Block] Stock compensation plans Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] Segment Data Segment Reporting Disclosure [Text Block] Reconciliation of OUP to consolidated Reconciliation of revenue from segments to consolidated Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] Segment Reporting, Reconciling Item for OUP to Consolidated [Line Items] Reconciliation of OUP to Consolidated [Table] Segment Reporting, Reconciliation of OUP to Consolidated [Table] Segment Reporting, Revenue Reconciling Item [Line Items] Reconciliation of Revenue from Segments to Consolidated [Table] Selling and administrative expenses Shares granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Weighted average per share fair value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Shares granted Weighted average per share fair value Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Award Type and Plan Name [Axis] Share-based Compensation Arrangements by Share-based Payment Award, Award Type and Plan Name [Domain] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Consolidated Statements Of Cash Flows (Unaudited) [Abstract] Shareholders' Equity Stockholders' Equity Note Disclosure [Text Block] Subsequent Event Type [Axis] Subsequent Event [Line Items] Subsequent Event [Table] Subsequent Event Type [Domain] Net investment hedges [Abstract] Tax years subject to tax examination SUPPLEMENTAL CASH FLOW INFORMATION: Excess tax benefit on exercise of stock options Excess Tax Benefit from Share-based Compensation, Financing Activities Total current assets Assets, Current CURRENT ASSETS: Gain/(Loss) from economic hedges included in Accumulated Other Comprehensive Income, net of taxes Gross unrecognized tax benefits Unrecognized tax benefits that would favorably impact effective tax rate if recognized Weighted average shares - diluted Weighted-average common shares outstanding - diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Weighted average shares - basic Weighted-average common shares outstanding - basic (in shares) Weighted-average common shares outstanding - basic (in shares) PROPERTY AND EQUIPMENT: Total assets Assets Other long-term liabilities Franchise revenue Income Tax Authority [Domain] Reorganization costs Schedule of Restructuring and Related Costs [Table] Stock Compensation Plans Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping, Disclosure Item Amounts [Axis] Fair Value, Disclosure Item Amounts [Domain] Carrying Amount [Member] Fair Value [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Antidilutive Securities, Name [Domain] Long-term Debt Restructuring reserve [Roll Forward] Assets [Abstract] Assets [Abstract] Fair value measurements of derivative assets Fair Value Measurements Using Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] Fair Value Measurements Using Significant Other Observable Inputs (Level 2) [Member] Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Member] Shareholders' Equity [Abstract] Shareholders' Equity [Abstract] Shareholders' Equity [Abstract] Treasury stock at cost, 27,476,310 and 26,535,104 shares, respectively Treasury Stock, Value Unrealized gain (loss) on investments Excess tax benefit on exercise of stock options Excess Tax Benefit from Share-based Compensation, Operating Activities Other assets Other Assets, Noncurrent Goodwill [Roll Forward] Net Earnings Per Share - Basic [Abstract] Net Earnings Per Share - Diluted [Abstract] Antidilutive securities excluded from the calculation of Net Earnings Per Share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, by Antidilutive Securities [Axis] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Net Earnings Per Share [Abstract] Net Earnings Per Share [Abstract] Net Earnings Per Share [Abstract] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Goodwill acquired Other liabilities Deferred income taxes Common stock, par value (in dollars per share) Treasury stock at cost (in shares) Preferred stock, $.01 par value, authorized 25,000,000 shares, none issued Provision for income taxes Income Tax Expense (Benefit) Foreign exchange (gains) / losses Foreign Currency Transaction Gain (Loss), before Tax Foreign currency forward contracts Employee Stock Option [Member] Statement, Business Segments [Axis] Segment, Geographical [Domain] Statement, Geographical [Axis] Available-for-sale securities Available-for-sale Securities, Fair Value Disclosure Net Earnings Per Share Earnings Per Share [Text Block] Net earnings Net earnings Net earnings Net earnings / (loss) available to common shareholders Consideration paid in cash Consideration paid, equity portion Business acquisition, debt repaid upon closing Depreciation and amortization Components of Comprehensive Income (Loss), net of tax [Abstract] Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest SHAREHOLDERS' EQUITY: Total shareholders' equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Acquisitions Business Combination Disclosure [Text Block] Prepaid expenses and other assets Adjustments to reconcile net earnings / (loss) to net cash provided by (used in) operating activities: Accrued liabilities Value added taxes payable Proceeds from share-based awards Earnings before income taxes Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Earnings / (loss) before income taxes Total assets Assets, Fair Value Disclosure Other reporting units [Member] Segment [Domain] Total Segments [Member] Corporate Expenses [Member] Estimated amortization expense, remainder of the current fiscal year Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Fair Value Hierarchy [Domain] Recurring Basis [Member] Currency and other impacts Accumulated impairment loss, beginning of period Accumulated impairment loss, end of period Goodwill, Impaired, Accumulated Impairment Loss Accumulated impairment loss Accounting Standards Update 2009-13 [Member] Guidance on Multiple-Deliverable Revenue Arrangements [Member] Acquisitions [Abstract] Fair Value, Hierarchy [Axis] Fair Value by Measurement Frequency [Axis] Contingencies [Abstract] Commitments and Contingencies Disclosure [Abstract] Income Taxes [Abstract] Income Tax Disclosure [Abstract] Goodwill and Other Intangible Assets Goodwill Disclosure [Text Block] Retirement Plans [Abstract] Compensation and Retirement Disclosure [Abstract] Components of Comprehensive Income (Loss), net of tax Stock Compensation Plans [Abstract] Reorganization Costs [Abstract] Components of Accumulated Other Comprehensive Income (Loss), net of tax Other Restricted Stock Units [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Restructuring Cost and Reserve [Line Items] Segment Data [Abstract] Segment Data [Abstract] Segment Reporting [Abstract] Type of Adoption [Domain] Subsequent event date Consideration paid in common stock, number of shares issued (in shares) Income Tax Authority [Axis] Interest and Other Expenses Net Earnings Per Share Adjustments for New Accounting Pronouncements [Axis] Amendment Flag Current Fiscal Year End Date Document Period End Date Entity [Text Block] Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Public Float Entity Registrant Name Entity Central Index Key Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus Entity by Location [Axis] Location [Domain] Document Type Accrued Payroll Taxes And Employee Benefits Current Sum of the carrying values as of the balance sheet date of obligations incurred through that date and payable for statutory payroll taxes withheld from, and perquisites provided to, employees pertaining to services received from them, including entity's matching share of FICA taxes and contributions to the state and federal unemployment insurance programs. Excludes pension and other postretirement benefits. Used to reflect the current portion of the liabilities. Accrued payroll taxes and insurance Interest And Other Nonoperating Expenses Sum of interest income and expense, foreign exchange gains and losses and other miscellaneous non-operating income and expenses. Interest and other expenses Interest and other expenses Interest and other expenses Basis Of Presentation And Accounting Policies [Text Block] The entire disclosure for 1) the basis of presentation, or accounting, and significant accounting policies, and 2) significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Basis of Presentation and Accounting Policies Basis of Presentation and Accounting Policies [Abstract] Recently Issued Accounting Standards [Abstract] Recently Issued Accounting Standards [Abstract] Interest And Other Expenses [Text Block] 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 Derivative Financial Instruments And Related Fair Values [Text Block] This element can be used to disclose the entity's entire derivative instruments and hedging activities disclosure as a single block of text. Describes an entity's risk management strategies, derivatives in hedging activities and non-hedging derivative instruments, the assets, obligations, liabilities, revenues and expenses arising there from, and the amounts of and methodologies and assumptions used in determining the amounts of such items. Also represents the complete disclosure regarding the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments, assets, and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the Company is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risk is are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. Derivative Financial Instruments and Fair Value Measurements Derivative Financial Instruments and Fair Value Measurements [Abstract] Derivative Financial Instruments and Fair Value Measurements [Abstract] Defined benefit pension plans, other comprehensive income The increase (decrease) in accumulated comprehensive income during the period related to defined benefit pension plans, after tax. Defined benefit pension plans Retiree health care plan, other comprehensive income The increase (decrease) in accumulated comprehensive income during the period related to other postretirement benefit plans, after tax. Retiree health care plan Defined benefit pension plans, accumulated other comprehensive income The total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension plan(s) because they have yet to be recognized as components of net periodic benefit cost. Defined benefit pension plans Retiree health care plan, accumulated other comprehensive income The total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost. Retiree health care plan Business Acquisition, Price of Common Stock Per Share Common stock price per share of the acquired entity on the acquisition date. Value of common stock acquired (price per share) Percentage of consideration paid in common stock The percentage of the total consideration paid for an acquisition that was paid in the form of common stock. Percentage of consideration paid in common stock Percentage of consideration paid in cash The percentage of the total consideration paid for an acquisition that was paid in the form of cash. Percentage of consideration paid in cash Incremental Common Stock Shares Attributable to Restricted Stock Grants Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of restricted stock grants using the treasury stock method. Effect of restricted stock grants (in shares) Incremental Common Shares Attributable to Stock Options 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. Effect of dilutive securities - stock options (in shares) Effective Income Tax Rate, Continuing Operations, Excluding French Business Tax A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations. This ratio excludes the impact of the French Business Tax. Effective income tax rate, excluding French Business Tax Expected Annual Effective Income Tax Rate, Continuing Operations A ratio calculated by dividing the expected annual income tax expense attributable to continuing operations by GAAP-basis forecast pretax income from continuing operations. This ratio represents the effective income tax rate that the Company expects to realize for the fiscal year, as of the balance sheet date. Expected annual effective income tax rate Accrued Salaries Current And Accrued Vacation Current 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). Employee compensation payable Total Shares Granted In Period Sharebased Compensation Number of shares of stock (or other type of equity) granted during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP). Total shares granted Weighted Average Per Share Fair Value Sharebased Compensation The weighted average grant-date fair value of 1) options granted during the reporting period as calculated by applying the disclosed option pricing methodology, and 2) nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Weighted average per share fair value Office Closure Costs 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, net Interest Income 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 Defined Benefit Plan Total Estimated Future Employer Contributions In Current Fiscal Year The employer's best estimate, as soon as it can be reasonably determined, of the contributions expected to be paid to the plan in the current fiscal year. This estimate includes actual contributions paid during the reporting period and expected contributions to be paid during the remainder of the current fiscal year. Estimated contributions may be presented in the aggregate combining (1) contributions required by funding regulations or laws, (2) discretionary contributions, and (3) noncash contributions. Total expected employer contributions in current fiscal year Corporate Goodwill From Acquisition Majority of Corporate goodwill arising from acquisition of one entity. Goodwill attributable from acquisition of Jefferson Wells Severance Costs Net 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 reversal Severance costs, net Accounts Payable And Accrued Temp Payroll 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 Accounting Guidance on Business Combinations [Member] Accounting standards update as new guidance on on business combinations that clarifies the acquisition date that should be used for reporting the pro forma financial information disclosures when comparative financial statements are presented. Accounting Guidance on Goodwill Impairment Testing [Member] Accounting standards update as new guidance on goodwill impairment testing that modifies step 1 of the goodwill impairment test for reporting units with zero or negative carrying amounts. Deferred Stock Units [Member] Deferred stock units as awarded by a company to their employees as a form of incentive compensation. Perfomance Share Units [Member] Perfomance Share Units awarded by a company to their employees as a form of incentive compensation tied to their perfomance. COMSYS [Member] Information pertaining to acquisition of COMSYS IT Partners, Inc. Americas [Member] Segment information pertaining to Americas. Southern Europe [Member] Segment information pertaining to Southern Europe. Northern Europe [Member] Segment information pertaining to Northern Europe. APME [Member] Segment information pertaining to APME. Right Management [Member] Segment information pertaining to Right Management. Corporate [Member] Segment information pertaining to Corporate. France [Member] Information pertaining to business activities in France. Italy [Member] Information pertaining to business activities in Italy. Various Jurisdictions [Member] 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. United States [Member] The name of a geographic segment representing facts about a reporting entity disaggregated by the geographic area of the entities activities. Elan [Member] The name of a geographic segment representing facts about a reporting entity disaggregated by the geographic area of the entities activities. Netherlands (Vitae) [Member] The name of a geographic segment representing facts about a reporting entity disaggregated by the geographic area of the entities activities. Euro-denominated Note EUR300 [Member] An obligation resulting from borrowing money. Euro-denominated Note EUR200 [Member] An obligation resulting from borrowing money. Other Americas [Member] The name of a geographic segment representing facts about a reporting entity disaggregated by the geographic area of the entities activities. Other Southern Europe [Member] The name of a geographic segment representing facts about a reporting entity disaggregated by the geographic area of the entities activities. Intangible Asset Amortization Expense [Member] Amortization of intangibles related to acquisitions. Reclassification of French Business Tax [Member] French Business Tax reported by France reportable segment as Cost of Services, which is reclassified into Provision for Income Taxes on the Consolidated Statement of Operations. Common stock issued for acquisition Common stock issued for acquisition Non-cash financing activity: Payments for repurchase of common stock Repurchases of common stock Payments Of Dividends Common Stock Dividends paid Goodwill and Other Intangible Assets [Abstract] Goodwill and intangible assets Schedule of Intangible Assets [Table] Tabular disclosure of intangible assets by type of asset, including gross and net balances and accumulated amortization. Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Technology [Member] Reacquired Franchise Rights [Member] Other Intangible Assets [Member] Indefinite-lived Intangible Assets by Major Class [Axis] Indefinite-lived Intangible Assets, Major Class Name [Domain] Tradenames [Member] Schedule Of Intangible Assets [Line Items] Amortizable intangible assets [Abstract] Gross Net Non-amortizable intangible assets [Abstract] Non-amortizable intangible assets Intangible assets [Abstract] Accounting Guidance On Fair Value Measurement [Member] Accounting standards update as new guidance on fair value measurement that clarifies some existing concepts, eliminates wording difference between U.S. Generally Accepted Accounting Principles (GAAP) and International Financial Reporting Standards (IFRS), and in some limited cases, changes some principles to achieve convergence between U.S. GAAP and IFRS. Accounting Guidance on Fair Value Measurement [Member] Accounting Guidance On Presentation Of Comprehensive Income [Member] Accounting standards update as new guidance on presentation of comprehensive income that requires an entity to present the total of comprehensive income, the components of net income, and the components of other comprehensive income either in a single continuous statement of comprehensive income, or in two separate but consecutive statements. Accounting Guidance on Presentation of Comprehensive Income [Member] Acquisition of Proservia SA [Member] Acquisition Cost Per Share The total cost, per share, of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition. Acquisition cost (in Euro per share) Dilutive Securities Effect On Basic Earnings Per Share Other Awards Effect of other stock-based awards (in shares) 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. Share Repurchase Programs [Table] Tabular disclosure of an entity's share repurchase programs. Share Repurchase Programs By Year [Axis] Information about the entity's share repurchase programs, by year of authorization. Share Repurchase Programs, by Year [Axis] Share Repurchase Programs Year [Domain] The year of authorization for each share repurchase program. Share Repurchase Programs, Year [Domain] Authorized In 2007 [Member] The share repurchase program authorized in 2007. Authorized in 2007 [Member] Authorized In 2010 [Member] The share repurchase program authorized in 2010. Authorized in 2010 [Member] Share Repurchase Programs [Line Items] Shares authorized to be repurchased (in shares) Authorized amount Shares repurchased (in shares) Remaining number of shares authorized to be repurchased Franchise Agreements [Member] Customer Relationships [Member] Subsequent Event Amount Per Share Reflects the known or estimated financial effect of the event, or transaction, on a per share basis, that occurred between the balance sheet date and the date the financial statements are issued or available to be issued. Amount (dollars per share) Gross Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, before deduction of accumulated amortization. Intangible Assets Gross Euro-denominated Notes Total [Member] Authorized in 2011 [Member] Proservia Sa [Member] Proservia SA [Member] Information pertaining to acquisition of Proservia SA. Shares and voting rights acquired (in hundredths) Significant Assumptions Used In Goodwill Impairment Test [Abstract] Significant assumptions used in goodwill impairment test [Abstract] Discount Rate Minimum Discount rate, minimum The minimum discount rate used in the annual goodwill impairment test. Discount rate, maximum Discount Rate Maximum The maximum discount rate used in the annual goodwill impairment test. Goodwill and Intangible Assets Gain associated with forward contracts included in Interest and Other Expenses Dividend Declaration Date Dividend declaration date The day, month and year (YYYY-MM-DD) that the dividend paid was declared. Dividends Paid Amount Per Share Dividend paid (in dollars per share) The per share amount of a dividend declared and paid as of the financial reporting date. Debt [Abstract] Debt Line of Credit Facility [Table] Line Of Credit Facility By Facility [Axis] Line of Credit Facility by Facility [Axis] The information pertaining to the line of credit by facility. Line Of Credit Facility Facility [Domain] Line of Credit Facility, Facility [Domain] Identification of the facility. New Credit Agreement [Member] Information pertaining to the new Five-Year Credit Agreement. Prior Revolving Credit Facility [Member] Information pertaining to the prior revolving credit facility. This revolving credit facility was replaced by the new Five-Year Credit Agreement. Line of Credit Facility [Line Items] Credit agreement, maximum borrowing capacity Term Of Credit Agreement Term of credit agreement (in years) The term of the credit agreement from inception to termination. Amount Available For Stand By Letters Of Credit Amount available for stand-by letters of credit The amount that may be used for the issuance of stand-by letters of credit under the credit agreement. Credit agreement, expiration date Annual Facility Fee Annual facility fee (in basis points) The facility fee paid to the lender(s) annually under the credit agreement. This fee is paid on the entire maximum borrowing capacity of the credit agreement regardless of any borrowings outstanding. Credit spread (in basis points) The credit spread on any borrowings under the credit agreement. Credit Spread Ratio Of Indebtedness To Ebitda Maximum leverage ratio A ratio calculated as the total indebtedness to earnings before interest, taxes, depreciation and amortization (EBITDA). Fixed Charge Coverage Ratio Minimum fixed charge coverage ratio A ratio that indicates a firm's ability to satisfy fixed financing expenses, such as interest and leases. Dividends paid