Supplemental Cash Flow Elements [Abstract] Interest paid Interest Paid Income taxes paid Income Taxes Paid, Net Treasury stock purchases settled after the balance sheet date Treasury Stock Purchases Settled After Balance Sheet Date Future cash outflow to pay for treasury stock purchases that have occurred. Accounting Changes and Error Corrections [Abstract] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2018-02 Accounting Standards Update 2018-02 [Member] Accounting Standards Update 2018-02 [Member] Accounting Standards Update 2017-12 Accounting Standards Update 2017-12 [Member] Accounting Standards Update 2017-12 [Member] Accounting Standards Update 2014-09 Accounting Standards Update 2014-09 [Member] New Accounting Pronouncement, Early Adoption [Axis] New Accounting Pronouncement, Early Adoption [Axis] New Accounting Principles, Early Adoption [Domain] New Accounting Principles, Early Adoption [Domain] New Accounting Pronouncement, Early Adoption, Effect New Accounting Pronouncement, Early Adoption, Effect [Member] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Retained Earnings Retained Earnings [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Cumulative-effect adjustment of ASU adoption Cumulative Effect of New Accounting Principle in Period of Adoption Revenue from Contract with Customer [Abstract] Revenue Recognition Revenue from Contract with Customer [Text Block] Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Payments Payments And Industry Products Segment [Member] Payments and Industry Products Segment Financial Financial Institution Services Segment [Member] Financial Institution Services Segment Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Operating segments Operating Segments [Member] Corporate and Other Corporate Reconciling Items And Eliminations [Member] Corporate Reconciling Items And Eliminations [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Processing and services revenue Sales Revenue, Services, Net Product revenue Sales Revenue, Goods, Net Total revenue Revenues Operating income Operating Income (Loss) Equity [Abstract] Accumulated Other Comprehensive Loss Comprehensive Income (Loss) Note [Text Block] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Foreign currency forward exchange contracts Foreign Exchange Contract [Member] Currency [Axis] Currency [Axis] All Currencies [Domain] All Currencies [Domain] Indian Rupee India, Rupees Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Estimated interest expense related to settled interest rate hedge contracts during the next twelve months Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net Notional amount of derivative Derivative, Notional Amount Total fair value of cash flow hedge derivatives Cash Flow Hedges Derivative Instruments at Fair Value, Net Estimate of gain related to foreign currency exchange contracts during the next 12 months Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months Revenue, Initial Application Period Cumulative Effect Transition [Table] Revenue, Initial Application Period Cumulative Effect Transition [Table] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Cost of Services Cost Of Services [Member] Cost Of Services [Member] Interest Expense Interest Expense [Member] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Domain] Initial Application Period Cumulative Effect Transition [Domain] Adjustments Difference between Revenue Guidance in Effect before and after Topic 606 [Member] Balances without adoption of ASC 606 Calculated under Revenue Guidance in Effect before Topic 606 [Member] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Net income Net Income (Loss) Attributable to Parent Fair market value adjustment on cash flow hedges, net of income tax benefit of $2 million Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Reclassification adjustment for net realized gains on cash flow hedges included in cost of processing and services, net of income tax benefit of $1 million Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax Reclassification adjustment for net realized losses on cash flow hedges included in interest expense, net of income tax provision of $0, $1 million, $1 million and $3 million Foreign currency translation Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Total other comprehensive (loss) income Other Comprehensive Income (Loss), Net of Tax Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Income tax provision on fair market value adjustment on cash flow hedges Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax Income (benefit) expense on reclassification adjustment for net realized gain on cash flow hedges Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax Goodwill and Intangible Assets Disclosure [Abstract] Intangible Assets Intangible Assets Disclosure [Text Block] Assets Assets [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value, Including Discontinued Operations Trade accounts receivable, net Accounts Receivable, Net, Current Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property and equipment, net Property, Plant and Equipment, Net Intangible assets, net Finite-Lived Intangible Assets, Net Goodwill Goodwill Contract costs, net Capitalized Contract Cost, Net Other long-term assets Other Assets, Noncurrent Total assets Assets Liabilities and Shareholders’ Equity Liabilities and Equity [Abstract] Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities, Current Current maturities of long-term debt Long-term Debt and Capital Lease Obligations, Current Contract liabilities Contract with Customer, Liability, Current Total current liabilities Liabilities, Current Long-term debt Long-term Debt and Capital Lease Obligations Deferred income taxes Deferred Tax Liabilities, Net, Noncurrent Long-term contract liabilities Contract with Customer, Liability, Noncurrent Other long-term liabilities Other Liabilities, Noncurrent Total liabilities Liabilities Total shareholders’ equity Stockholders' Equity Attributable to Parent Total liabilities and shareholders’ equity Liabilities and Equity Statement of Financial Position [Abstract] Assets held for sale Assets Held-for-sale, Not Part of Disposal Group, Current Commitments and contingencies Commitments and Contingencies Shareholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, no par value: 25.0 million shares authorized; none issued Preferred Stock, Value, Issued Common stock, $0.01 par value: 1,800.0 million shares authorized; 791.4 million shares issued Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital, Common Stock Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Retained earnings Retained Earnings (Accumulated Deficit) Treasury stock, at cost, 390.4 million and 376.3 million shares Treasury Stock, Value Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Customer related intangible assets Customer-Related Intangible Assets [Member] Acquired software and technology Acquired Software And Technology [Member] Purchased software applications and internally developed software for sale, licensing or long-term internal use acquired in a business combination. Trade names Trade Names [Member] Capitalized software development costs Capitalized Software Development Costs [Member] Internally developed software for sale, licensing or long-term internal use (classified as intangible assets). Purchased software Computer Software, Intangible Asset [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Gross Carrying Amount Finite-Lived Intangible Assets, Gross Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Net Book Value Disaggregation of revenue Disaggregation of Revenue [Table Text Block] Schedule of remaining performance obligations Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] Schedule of effect of new accounting pronouncements Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Contract with customer, asset and liabilities Contract with Customer, Asset and Liability [Table Text Block] Payables and Accruals [Abstract] Trade accounts payable Accounts Payable, Current Client deposits Customer Advances and Deposits Settlement obligations Settlement Liabilities, Current Accrued compensation and benefits Accrued Employee Benefits, Current Other accrued expenses Other Accrued Liabilities, Current Total Business Combinations [Abstract] Acquisitions and Dispositions Business Combination Disclosure [Text Block] Earnings Per Share [Abstract] Weighted-average common shares outstanding used for the calculation of net income per share – basic Weighted Average Number of Shares Outstanding, Basic Common stock equivalents (in shares) Weighted Average Number Diluted Shares Outstanding Adjustment Weighted-average common shares outstanding used for the calculation of net income per share – diluted Weighted Average Number of Shares Outstanding, Diluted Shares Used in Computing Net Income Per Share Earnings Per Share [Text Block] Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Short-term Debt, Type [Axis] Short-term Debt, Type [Axis] Short-term Debt, Type [Domain] Short-term Debt, Type [Domain] Senior Notes Senior Notes [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving Credit Facility Revolving Credit Facility [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Term Loan Loans Payable [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Senior Notes 3.8 Percent Due October 2023 Senior Notes 3.8 Percent Due October 2023 [Member] Senior Notes 3.8 Percent Due October 2023 [Member] Senior Notes 4.2 Percent Due October 2028 Senior Notes 4.2 Percent Due October 2028 [Member] Senior Notes 4.2 Percent Due October 2028 [Member] Senior Notes 4.625 Percent Due October 2020 Senior Notes 4.625 Percent Due October 2020 [Member] Senior Notes 4.625 Percent Due October 2020 Debt Instrument [Line Items] Debt Instrument [Line Items] Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Debt instrument terms for line of credit,debt to income ratio Debt Instrument Terms For Line Of Credit, Debt To Income Ratio Debt Instrument Terms For Line Of Credit, Debt To Income Ratio Debt instrument terms for line of credit, debt to income ratio Debt Instrument Terms For Line Of Credit, Income To Interest Expense Ratio Debt Instrument Terms For Line Of Credit, Income To Interest Expense Ratio Debt instrument, face amount Debt Instrument, Face Amount Debt instrument, interest rate Debt Instrument, Interest Rate, Stated Percentage Debt instrument interest maximum additional interest above base rate Debt Instrument Interest Maximum Additional Interest Above Base Rate Debt Instrument Interest Maximum Additional Interest Above Base Rate Extinguishment of debt Extinguishment of Debt, Amount Repayments of debt Repayments of Debt Loss on early debt extinguishment Gain (Loss) on Extinguishment of Debt Accounts Payable and Accrued Expenses Accounts Payable and Accrued Liabilities Disclosure [Text Block] Cash Flow Information Cash Flow, Supplemental Disclosures [Text Block] Business Segment Information Segment Reporting Disclosure [Text Block] Equity Method Investments and Joint Ventures [Abstract] Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Affiliated Entity Affiliated Entity [Member] Variable-Rate Term Loan Facilities Due March 2023 Variable-Rate Term Loan Facilities Due March 2023 [Member] Variable-Rate Term Loan Facilities Due March 2023 [Member] Variable-Rate Revolving Credit Facilities Due March 2023 Variable-Rate Revolving Credit Facilities Due March 2023 [Member] Variable-Rate Revolving Credit Facilities Due March 2023 [Member] Term Loan Facilities Term Loan Facilities [Member] Term Loan Facility [Member] Line of Credit Line of Credit [Member] Investment, Name [Axis] Investment, Name [Axis] Investment, Name [Domain] Investment, Name [Domain] Fiserv Automotive Solutions, LLC Fiserv Automotive Solutions, LLC [Member] Fiserv Automotive Solutions, LLC [Member] Fiserv LS LLC Fiserv LS LLC [Member] Fiserv LS LLC [Member] Lending Solutions Business Lending Solutions Business [Member] Lending Solutions Business [Member] StoneRiver Group, L.P. StoneRiver Group L.P. [Member] Joint venture in which the company owns a partial interest , which is accounted for as an equity method investment. Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Controlling interest sold Sale of Business, Percentage of Ownership Sold In Transaction Sale of Business, Percentage of Ownership Sold In Transaction Proceeds from sale of businesses Proceeds from Divestiture of Businesses Gain on sale of businesses Gain (Loss) on Disposition of Business Gain on sale of businesses, tax Gain (Loss) on Disposition of Business, Tax Gain (Loss) on Disposition of Business, Tax Pre-tax gain on sale Equity Method Investment, Realized Gain (Loss) on Disposal Gain on sale, tax Equity Method Investment, Realized Gain (Loss) On Disposal, Tax Equity Method Investment, Realized Gain (Loss) On Disposal, Tax Remeasurement of retained interests Deconsolidation, Revaluation of Retained Investment, Gain (Loss), Amount Gain contingency, unrecorded (up to) Gain Contingency, Unrecorded Amount Investment in affiliate Equity Method Investments Long-term liability Non-operating income Nonoperating Income (Expense) Processing and services Percentage of interest owned in affiliate Equity Method Investment, Ownership Percentage Dividends from unconsolidated affiliates Proceeds from Equity Method Investment, Distribution Income from investments in unconsolidated affiliates Income (Loss) from Equity Method Investments Income (Loss) from Equity Method Investments, Tax Expense (Benefit) Income (Loss) from Equity Method Investments, Tax Expense (Benefit) Income (Loss) from Equity Method Investments, Tax Expense (Benefit) Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Share-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Accounting Policies [Abstract] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Common Stock Common Stock [Member] Additional Paid-In Capital Additional Paid-in Capital [Member] Class of Stock [Line Items] Class of Stock [Line Items] Stock split ratio Stockholders' Equity Note, Stock Split, Conversion Ratio Adjustments due stock split, APIC Adjustments to Additional Paid in Capital, Stock Split Changes in accumulated other comprehensive loss by component, net of income taxes Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Statement of Comprehensive Income [Abstract] Statement [Table] Statement [Table] Statement [Line Items] Statement [Line Items] Income (benefit) expense on reclassification adjustment for net realized gain on cash flow hedges Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Income tax provision before income from investment in unconsolidated affiliate Effective Income Tax Rate Reconciliation, Percent Gain on sale, income tax expense Pre-tax gain on sale Tax cuts and jobs act of 2017, provisional income tax expense (benefit) Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Provisional Income Tax Expense (Benefit) Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Provisional Income Tax Expense (Benefit) Long-term Debt Long-term Debt [Text Block] Other comprehensive (loss) income: Other Comprehensive Income (Loss), Net of Tax [Abstract] Fair market value adjustment on cash flow hedges, net of income tax (benefit) provision of ($2 million), ($1 million), ($4 million) and $1 million Schedule of intangible assets by class Schedule of Finite-Lived Intangible Assets [Table Text Block] Recent Accounting Pronouncements New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Cash Flow Hedges Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] Foreign Currency Translation Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Other Other Accumulated Other Comprehensive Income [Member] Accumulated change in equity from transactions and other events and circumstances from non-owner sources at fiscal year-end, not separately disclosed. Total AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] Balance at beginning of period Other comprehensive income before reclassifications Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Amounts reclassified from accumulated other comprehensive loss Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Balance at end of period Schedule of segment reporting information Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Stock options Employee Stock Option [Member] Restricted stock units Restricted Stock Units (RSUs) [Member] Performance share units Performance Shares [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based awards, stock options, granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Share-based awards, stock options, weighted-average grant date fair value (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Share-based awards, restricted stock units, granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Share-based awards, restricted stock units, weighted-average grant date fair values (in dollar per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Fair Value Disclosures [Abstract] Investment [Table] Investment [Table] Investment [Line Items] Investment [Line Items] Fair value of total debt Debt Instrument, Fair Value Disclosure Contingent consideration liability, fair value Business Combination, Contingent Consideration, Liability Fair value of line of credit Lines of Credit, Fair Value Disclosure Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Capitalized Contract Cost [Axis] Capitalized Contract Cost [Axis] Capitalized Contract Cost [Domain] Capitalized Contract Cost [Domain] Sales Commissions Sales Commissions [Member] Sales Commissions [Member] Conversion or Implementation Costs Conversion Or Implementation Costs [Member] Conversion Or Implementation Costs [Member] Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Product Product [Member] Percentage of consolidated revenue (less than) Percentage Of Company-Wide Revenues Percentage Of Company-Wide Revenues Revenue recognized which was included in the contract liability balance Contract with Customer, Liability, Revenue Recognized Remaining revenue performance obligation, optional exemption, contract term Revenue, Remaining Performance Obligation, Optional Exemption, Contract Term Revenue, Remaining Performance Obligation, Optional Exemption, Contract Term Capitalized contract costs Capitalized Contract Cost, Gross Capitalized contract costs, amortization Capitalized Contract Cost, Amortization Capitalized contract cost, impairment loss Capitalized Contract Cost, Impairment Loss Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Geographic Concentration Risk Geographic Concentration Risk [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Sales Revenue, Net Sales Revenue, Net [Member] Subsegment [Axis] Subsegments [Axis] Subsegment [Domain] Subsegments [Domain] Digital Money Movement Digital Money Movement Subsegment [Member] Digital Money Movement Subsegment [Member] Card and Related Services Card And Related Services Subsegment [Member] Card And Related Services Subsegment [Member] Other Payment And Industry Products Services, Other Subsegment [Member] Payment And Industry Products Services, Other Subsegment [Member] Total Payments Payments Subsegment [Member] Payments Subsegment [Member] Account and Item Processing Account And Item Processing Subsegment [Member] Account And Item Processing Subsegment [Member] Lending Solutions Lending Solutions Subsegment [Member] Lending Solutions Subsegment [Member] Other Financial Institution Services, Other Subsegment [Member] Financial Institution Services, Other Subsegment [Member] Total Financial Financial Subsegment [Member] Financial Subsegment [Member] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] Foreign Tax Authority Foreign Tax Authority [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Capitalized Contract Cost, Impairment Loss Percentage of concentration risk Concentration Risk, Percentage Revenue from contract with customer Revenue from Contract with Customer, Excluding Assessed Tax Share-based compensation expense Allocated Share-based Compensation Expense Share-based awards, stock options, exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Schedule of accounts payable and accrued expenses Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Revenue: Revenues [Abstract] Product Expenses: Costs and Expenses [Abstract] Cost of processing and services Cost of Services Cost of product Cost of Goods Sold Selling, general and administrative Selling, General and Administrative Expense (Gain) loss on sale of businesses Total expenses Costs and Expenses Operating income Interest expense Interest Expense Loss on early debt extinguishment Income before income taxes and income from investments in unconsolidated affiliates Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Income tax provision Income Tax Expense (Benefit) Net income per share – basic (in dollars per share) Earnings Per Share, Basic Net income per share – diluted (in dollars per share) Earnings Per Share, Diluted Shares used in computing net income per share: Basic (in shares) Diluted (in shares) Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Series of Individually Immaterial Business Acquisitions Series of Individually Immaterial Business Acquisitions [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Number of acquisitions Number of Businesses Acquired Payments for acquisitions of businesses Business Combination, Consideration Transferred Cash acquired from acquisitions Cash Acquired from Acquisition Earn-out provisions, fair value Recognized identifiable assets acquired, finite-lived intangibles Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Other identifiable net assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tangible Assets, Net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tangible Assets, Net Deferred tax liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Goodwill, expected to be tax deductible Business Acquisition, Goodwill, Expected Tax Deductible Amount Revenue of acquiree since acquisition date Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Impact to operating income of acquiree since acquisition date (less than) Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual Consideration from sale of business Disposal Group, Including Discontinued Operation, Consideration Consideration, adjustment Disposal Group, Including Discontinued Operation, Consideration, Adjustment Disposal Group, Including Discontinued Operation, Consideration, Adjustment Gain (loss) on disposal Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal Gain on disposal, tax expense Disposal Group, Not Discontinued Operation, Gain on Disposal, Tax Expense Disposal Group, Not Discontinued Operation, Gain on Disposal, Tax Expense Preferred stock, par value (in dollars per share) Preferred Stock, No Par Value Preferred stock, shares authorized Preferred Stock, Shares Authorized Preferred stock, shares issued Preferred Stock, Shares Issued Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued Treasury stock (in shares) Treasury Stock, Shares Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities from continuing operations: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and other amortization Other Depreciation and Amortization Amortization of acquisition-related intangible assets Amortization of Acquisition-Related Intangible Assets The aggregate expense charged against earnings to allocate the cost of acquired intangible assets. As a noncash expense, this element is added back to net income when calculating cash provided by (used in) operations using the indirect method. Share-based compensation Share-based Compensation Deferred income taxes Deferred Income Tax Expense (Benefit) Income from investments in unconsolidated affiliates Non-cash impairment charges Asset Impairment Charges Changes in assets and liabilities, net of effects from acquisitions and dispositions: Increase (Decrease) in Operating Capital [Abstract] Trade accounts receivable Increase (Decrease) in Accounts Receivable Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Contract costs Increase (Decrease) In Contract With Customer, Asset Increase (Decrease) In Contract With Customer, Asset Accounts payable and other liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Contract liabilities Increase (Decrease) in Deferred Revenue Net cash provided by operating activities from continuing operations Net Cash Provided by (Used in) Operating Activities, Continuing Operations Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Capital expenditures, including capitalization of software costs Payments to Acquire Property, Plant, and Equipment Other investing activities Payments for (Proceeds from) Other Investing Activities Net cash provided by (used in) investing activities from continuing operations Net Cash Provided by (Used in) Investing Activities, Continuing Operations Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Debt proceeds Proceeds from Issuance of Long-term Debt Debt repayments, including redemption and other costs Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities Proceeds from issuance of treasury stock Proceeds from Issuance or Sale of Equity Purchases of treasury stock, including employee shares withheld for tax obligations Payments For Repurchase Of Common Stock And Payments Related To Tax Withholding For Share Based Compensation The cash outflow to reacquire common stock during the period and to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award. Other financing activities Proceeds from (Payments for) Other Financing Activities Net cash used in financing activities from continuing operations Net Cash Provided by (Used in) Financing Activities, Continuing Operations Net change in cash and cash equivalents from continuing operations Net Cash Provided by (Used in) Continuing Operations Net change in cash and cash equivalents from discontinued operations Net Cash Provided by (Used in) Discontinued Operations Cash and cash equivalents, beginning balance Cash and cash equivalents, ending balance Discontinued operations cash flow information: Net Cash Provided by (Used in) Discontinued Operations [Abstract] Net cash used in operating activities Cash Provided by (Used in) Operating Activities, Discontinued Operations Net cash provided by investing activities Cash Provided by (Used in) Investing Activities, Discontinued Operations Net change in cash and cash equivalents from discontinued operations Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Schedule of supplemental cash flow information Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Discontinued Operations and Disposal Groups [Abstract] Discontinued Operations Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Acquired intangible assets Acquired Intangible Assets [Member] Assets, excluding financial assets, lacking physical substance with a definite life, resulting from a business combination. Capitalized and purchased software Capitalized And Purchased Software [Member] Purchased software applications and internally developed software for sale, licensing or long-term internal use (classified as intangible assets). Estimated annual amortization expense in 2018 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months Estimated annual amortization expense in 2019 Finite-Lived Intangible Assets, Amortization Expense, Year Two Estimated annual amortization expense in 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Three Estimated annual amortization expense in 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Four Estimated annual amortization expense in 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Five Statement of Stockholders' Equity [Abstract] Treasury Stock Treasury Stock [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance at beginning of period (in shares) Shares, Issued Other comprehensive loss Share-based compensation Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Shares issued under stock plans Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Shares issued under stock plans (in shares) Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Purchases of treasury stock (in shares) Treasury Stock, Shares, Acquired Purchases of treasury stock Treasury Stock, Value, Acquired, Cost Method Balance at end of period (in shares) Statement of Cash Flows [Abstract] Gain on sale of businesses Other operating activities Other Operating Activities, Cash Flow Statement Payments for acquisitions of businesses, net of cash acquired Payments to Acquire Businesses, Gross Purchases of investments Payments to Acquire Investments Contract assets Contract with Customer, Asset, Net Contract liabilities Contract with Customer, Liability Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Processing and services Processing And Services [Member] Processing And Services [Member] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Performance obligations expected to be satisfied Revenue, Remaining Performance Obligation Performance obligations expected to be satisfied, expected timing Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Stock options excluded from the calculation of diluted weighted-average outstanding shares because their impact was anti-dilutive (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Fair Value Measurements Fair Value, Measurement Inputs, Disclosure [Text Block] Income Statement [Abstract] Net income Summary of stock option, restricted stock unit and performance share unit activity Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Grants in Period, Grant Date Intrinsic Value [Table Text Block] Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Grants in Period, Grant Date Intrinsic Value [Table Text Block] Investments in Unconsolidated Affiliates Equity Method Investments and Joint Ventures Disclosure [Text Block] Principles of Consolidation, Policy Consolidation, Policy [Policy Text Block] Recently Adopted And Issued Accounting Pronouncements, Policy New Accounting Pronouncements, Policy [Policy Text Block] Revenue from Contract with Customer, Policy Revenue From Contract With Customer [Policy Text Block] Revenue From Contract With Customer [Policy Text Block] Computation of shares used in calculating basic and diluted net income per common share Schedule of Weighted Average Number of Shares [Table Text Block] Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Disposal Group Classification [Domain] Disposal Group Classification [Domain] Discontinued Operations, Disposed of by Sale Discontinued Operations, Disposed of by Sale [Member] Discontinued Operations, Held-for-sale Discontinued Operations, Held-for-sale [Member] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Corresponding assets, held for sale Disposal Group, Including Discontinued Operation, Assets Income from discontinued operations, tax Discontinued Operation, Tax Effect of Income (Loss) from Discontinued Operation During Phase-out Period