Revenue from Contract with Customer [Abstract] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] 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 Discontinued Operations and Disposal Groups [Abstract] Discontinued Operations Disposal Groups, Including Discontinued Operations, 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] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Corporate and Other Corporate Reconciling Items And Eliminations [Member] Corporate Reconciling Items And Eliminations [Member] 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 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] Percentage of concentration risk Concentration Risk, Percentage Revenue from contract with customer Revenue from Contract with Customer, Excluding Assessed Tax 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] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] 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] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Term Loan Facilities Term Loan Facilities [Member] Term Loan Facility [Member] 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] 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] 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 business 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 Remeasurement of retained interests Deconsolidation, Revaluation of Retained Investment, Gain (Loss), Amount Percentage of interest owned in affiliate Equity Method Investment, Ownership Percentage Gain contingency, unrecorded (up to) Gain Contingency, Unrecorded Amount Investment in affiliate Equity Method Investments Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Long-term liability Other Liabilities, Noncurrent Non-operating income Nonoperating Income (Expense) Processing and services Sales Revenue, Services, Net Equity [Abstract] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] 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] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2017-12 Accounting Standards Update 2017-12 [Member] Accounting Standards Update 2017-12 [Member] Accounting Standards Update 2018-02 Accounting Standards Update 2018-02 [Member] Accounting Standards Update 2018-02 [Member] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] 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 Attributable to Parent [Member] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] 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 Stockholders' Equity Attributable to Parent Other comprehensive loss 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 Total other comprehensive (loss) Other Comprehensive Income (Loss), Net of Tax Cumulative-effect adjustment of ASU adoption Cumulative Effect of New Accounting Principle in Period of Adoption Balance at end of period Supplemental Cash Flow Elements [Abstract] Cash Flow Information Cash Flow, Supplemental Disclosures [Text Block] Schedule of supplemental cash flow information Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Contract assets Contract with Customer, Asset, Net Contract liabilities Contract with Customer, Liability Leases [Abstract] Operating lease assets Operating Lease, Right-of-Use Asset Finance lease assets Finance Lease, Right-of-Use Asset Total lease assets Lease, Right-Of-Use Asset Lease, Right-Of-Use Asset Current operating lease liabilities Operating Lease, Liability, Current Current finance lease liabilities Finance Lease, Liability, Current Noncurrent operating lease liabilities Operating Lease, Liability, Noncurrent Noncurrent finance lease liabilities Finance Lease, Liability, Noncurrent Total lease liabilities Lease, Liability Lease, Liability Operating lease assets, net of accumulated amortization Operating Lease, Right-Of-Use Asset, Accumulated Amortization Operating Lease, Right-Of-Use Asset, Accumulated Amortization Finance lease assets, net of accumulated amortization Finance Lease, Right-Of-Use Asset, Accumulated Amortization Finance Lease, Right-Of-Use Asset, Accumulated Amortization Accumulated Other Comprehensive Loss Comprehensive Income (Loss) Note [Text Block] Revenue Recognition Revenue from Contract with Customer [Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] 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] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Processing and services Processing And Services [Member] Processing And Services [Member] Product Product [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 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 Accounts Payable and Accrued Liabilities, Current Weighted-average remaining lease term Weighted Average Remaining Lease Term [Abstract] Weighted Average Remaining Lease Term [Abstract] Operating leases Operating Lease, Weighted Average Remaining Lease Term Finance leases Finance Lease, Weighted Average Remaining Lease Term Weighted-average discount rate Leases Weighted Average Discount Rate [Abstract] Leases Weighted Average Discount Rate [Abstract] Operating leases Operating Lease, Weighted Average Discount Rate, Percent Finance leases Finance Lease, Weighted Average Discount Rate, Percent Statement of Comprehensive Income [Abstract] Statement [Table] Statement [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] Statement [Line Items] Statement [Line Items] Net income Net Income (Loss) Attributable to Parent 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 of $8 million and zero Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Reclassification adjustment for net realized (gains) losses on cash flow hedges Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, After Tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, After Tax Reclassification adjustment for net realized (gains) losses on cash flow hedges Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax Foreign currency translation Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Business Combinations [Abstract] 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] Elan Financial Services Elan Financial Services [Member] Elan Financial Services [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Trade accounts receivable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Prepaid expenses and other current assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets Property and equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Goodwill Goodwill Accounts payable and other current liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Total purchase price Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Accounting Changes and Error Corrections [Abstract] Recent Accounting Pronouncements New Accounting Pronouncements and Changes in Accounting Principles [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 Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Lease term Lessee, Lease, Term Of Contract Lessee, Lease, Term Of Contract Operating leases, rent expense Operating Leases, Rent Expense Accounting Policies [Abstract] 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] Leases, Policy Lessee, Leases [Policy Text Block] Statement of Financial Position [Abstract] 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 Acquisitions Business Combination Disclosure [Text Block] Operating lease cost Operating Lease, Cost Finance lease cost Finance Lease, Cost [Abstract] Amortization of right-of-use assets Finance Lease, Right-of-Use Asset, Amortization Interest on lease liabilities Finance Lease, Interest Expense Lease, Cost Lease, Cost Variable lease cost included within operating lease cost Variable Lease, Cost 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. Goodwill and Intangible Assets Disclosure [Abstract] Intangible Assets Intangible Assets Disclosure [Text Block] Debt Disclosure [Abstract] Long-term Debt Long-term Debt [Text Block] Share-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Accounting Standards Update 2014-09 Accounting Standards Update 2014-09 [Member] Common Shares Common Stock [Member] Treasury Stock Treasury Stock [Member] Additional Paid-In Capital Additional Paid-in Capital [Member] Accumulated Other Comprehensive Loss Retained Earnings Retained Earnings [Member] Class of Stock [Line Items] Class of Stock [Line Items] 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 (in shares) Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Shares issued under stock plans Stock Issued During Period, Value, 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) 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 Statement of Cash Flows [Abstract] 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. Amortization of financing costs and debt discounts Amortization of Debt Issuance Costs and Discounts Share-based compensation Share-based Compensation Deferred income taxes Deferred Income Tax Expense (Benefit) Gain on sale of business Loss from investments in unconsolidated affiliates Income (Loss) from Equity Method Investments Other operating activities Other Operating Activities, Cash Flow Statement 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 Payments for acquisition of business, including working capital adjustments Payments to Acquire Businesses, Gross Purchases of investments Payments to Acquire Investments Other investing activities Payments for (Proceeds from) Other Investing Activities Net cash (used in) provided by 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 Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities Payments of debt financing, redemption and other costs Payments of Financing Costs 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. 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 cash flows from discontinued operations provided by investing activities Cash Provided by (Used in) Investing Activities, Discontinued Operations Cash and cash equivalents, beginning balance Cash and Cash Equivalents, at Carrying Value, Including Discontinued Operations Cash and cash equivalents, ending balance Balance Sheet Classification of Lease Assets and Liabilities Assets And Liabilities, Lessee [Table Text Block] Assets And Liabilities, Lessee [Table Text Block] Schedule of Cost, Supplemental Cash Flow and Other Information Related to Leases Lease, Cost [Table Text Block] Operating Lease Maturity under ASC 842 Lessee, Operating Lease, Liability, Maturity [Table Text Block] Finance Lease Maturity under ASC 842 Finance Lease, Liability, Maturity [Table Text Block] Operating Lease Maturity under ASC 840 Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] 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 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 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] 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). Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Estimated annual amortization expense in 2019 Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year Estimated annual amortization expense in 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Two Estimated annual amortization expense in 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Three Estimated annual amortization expense in 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Four Estimated annual amortization expense in 2023 Finite-Lived Intangible Assets, Amortization Expense, Year Five Fair Value Disclosures [Abstract] Fair Value Measurements Fair Value, Measurement Inputs, Disclosure [Text Block] Disaggregation of revenue Disaggregation of Revenue [Table Text Block] Contract with customer, asset and liabilities Contract with Customer, Asset and Liability [Table Text Block] Schedule of remaining performance obligations Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] Accounts Payable and Accrued Expenses Accounts Payable and Accrued Liabilities Disclosure [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] 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 Leases Lessee, Operating Leases [Text Block] Leases Lessee, Finance Leases [Text Block] Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Operating segments Operating Segments [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Processing and services revenue Product revenue Sales Revenue, Goods, Net Total revenue Revenues Operating income Operating Income (Loss) Investments in Unconsolidated Affiliates Equity Method Investments and Joint Ventures Disclosure [Text Block] Accounting Standards Update 2016-02 Accounting Standards Update 2016-02 [Member] Operating lease, liability Operating Lease, Liability Operating lease, right-of-use asset Business Segment Information Segment Reporting Disclosure [Text Block] Income tax benefit 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), Cash Flow Hedge, Gain (Loss), Reclassification, Tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, 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 Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Debt Instrument, Amortization, Period [Axis] Debt Instrument, Amortization, Period [Axis] Debt Instrument, Amortization, Period [Axis] Debt Instrument, Amortization, Period [Domain] Debt Instrument, Amortization, Period [Domain] [Domain] for Debt Instrument, Amortization, Period [Axis] Debt Instrument, Amortization, Period One Debt Instrument, Amortization, Period One [Member] Debt Instrument, Amortization, Period One [Member] Debt Instrument, Amortization, Period Two Debt Instrument, Amortization, Period Two [Member] Debt Instrument, Amortization, Period Two [Member] Debt Instrument, Amortization, Period Three Debt Instrument, Amortization, Period Three [Member] Debt Instrument, Amortization, Period Three [Member] Debt Instrument, Option [Axis] Debt Instrument, Option [Axis] Debt Instrument, Option [Axis] Debt Instrument, Option [Domain] Debt Instrument, Option [Domain] [Domain] for Debt Instrument, Option [Axis] Debt Instrument, Option, One Debt Instrument, Option, One [Member] Debt Instrument, Option, One [Member] Debt Instrument, Option, Two Debt Instrument, Option, Two [Member] Debt Instrument, Option, Two [Member] Short-term Debt, Type [Axis] Short-term Debt, Type [Axis] Short-term Debt, Type [Domain] Short-term Debt, Type [Domain] Bridge Loan Bridge Loan [Member] Term Loan Facility Term Loan Facility [Member] Term Loan Facility [Member] Senior Unsecured Bridge Term Loan Facility Senior Unsecured Bridge Term Loan Facility [Member] Senior Unsecured Bridge Term Loan Facility [Member] Senior Unsecured Term Loan Facility Senior Unsecured Term Loan Facility [Member] Senior Unsecured Term Loan Facility [Member] Senior Unsecured Term Loan Facility, Loans With Three Year Maturity Senior Unsecured Term Loan Facility, Loans With Three Year Maturity [Member] Senior Unsecured Term Loan Facility, Loans With Three Year Maturity [Member] Senior Unsecured Term Loan Facility, Loans With Five Year Maturity Senior Unsecured Term Loan Facility, Loans With Five Year Maturity [Member] Senior Unsecured Term Loan Facility, Loans With Five Year Maturity [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Debt costs Debt Issuance Costs, Gross 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 Revolving credit, increase limit Line of Credit Facility, Accordion Feature, Increase Limit Line of Credit Facility, Accordion Feature, Increase Limit Debt term Debt Instrument, Term Remaining borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Amortization rate Line Of Credit Facility, Amortization Rate Line Of Credit Facility, Amortization Rate 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 Debt extinguishment and bridge financing costs Gain (Loss) on Extinguishment of Debt Cash paid for amounts included in the measurement of lease liabilities Cash Flow, Lessee [Abstract] Cash Flow, Lessee [Abstract] Operating cash flows from operating leases Operating Lease, Payments Operating cash flows from finance leases Finance Lease, Interest Payment on Liability Financing cash flows from finance leases Finance Lease, Principal Payments Right-of-use assets obtained in exchange for lease liabilities Right-Of-Use Asset Obtained In Exchange For Lease Liability [Abstract] Right-Of-Use Asset Obtained In Exchange For Lease Liability [Abstract] Operating leases Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Finance leases Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Income Tax Disclosure [Abstract] Income tax provision before income from investment in unconsolidated affiliate Effective Income Tax Rate Reconciliation, Percent Pre-tax gain on sale Changes in accumulated other comprehensive loss by component, net of income taxes Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Customer related intangible assets Customer-Related Intangible Assets [Member] Trade name Trade Names [Member] Gross Carrying Amount Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Weighted-Average Useful Life Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 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 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] Gross Carrying Amount Finite-Lived Intangible Assets, Gross Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Net Book Value Finite-Lived Intangible Assets, Net First Data First Data [Member] First Data [Member] Payments for acquisitions of businesses Business Combination, Consideration Transferred Cash purchase price Working capital adjustments Business Combination, Consideration Transferred, Working Capital Adjustments Business Combination, Consideration Transferred, Working Capital Adjustments Earn-out provisions, fair value Business Combination, Contingent Consideration, Liability Future payments under a transition services agreement Business Combination, Liabilities Arising from Contingencies, Amount Recognized Transition services agreement term Business Combination, Liabilities Arising From Contingencies, Term Business Combination, Liabilities Arising From Contingencies, Term 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 Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual Acquired intangible asset amortization Amortization of Intangible Assets Consideration transferred, equity value Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Schedule of purchase price allocation Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Schedule of gross carrying amount and weighted-average useful life allocated to intangible assets Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block] Shares Used in Computing Net Income Per Share Earnings Per Share [Text Block] Operating Leases, under ASC 842 Operating Lease Liabilities, Payments Due [Abstract] 2019 Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year 2020 Lessee, Operating Lease, Liability, Payments, Due Year Two 2021 Lessee, Operating Lease, Liability, Payments, Due Year Three 2022 Lessee, Operating Lease, Liability, Payments, Due Year Four 2023 Lessee, Operating Lease, Liability, Payments, Due Year Five Thereafter Lessee, Operating Lease, Liability, Payments, Due after Year Five Total lease payments Lessee, Operating Lease, Liability, Payments, Due Less: Interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Present value of lease liabilities Finance Leases, under ASC 842 Finance Lease Liabilities, Payments, Due [Abstract] 2019 Finance Lease, Liability, Payments, Remainder of Fiscal Year 2020 Finance Lease, Liability, Payments, Due Year Two 2021 Finance Lease, Liability, Payments, Due Year Three 2022 Finance Lease, Liability, Payments, Due Year Four 2023 Finance Lease, Liability, Payments, Due Year Five Thereafter Finance Lease, Liability, Payments, Due after Year Five Total lease payments Finance Lease, Liability, Payments, Due Less: Interest Finance Lease, Liability, Undiscounted Excess Amount Present value of lease liabilities Finance Lease, Liability Operating lease payments related to options to extend lease terms that are reasonably certain of being exercised Lessee, Operating Lease, Liability, Option To Extend Lessee, Operating Lease, Liability, Option To Extend Minimum lease payments for leases signed but not yet commenced Lessee, Operating Lease, Liability, Lease Not Yet Commenced Lessee, Operating Lease, Liability, Lease Not Yet Commenced Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Equipment Equipment [Member] Leases not yet commenced, term Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract Operating Leases, under ASC 840 Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] 2019 Operating Leases, Future Minimum Payments Due, Next Twelve Months 2020 Operating Leases, Future Minimum Payments, Due in Two Years 2021 Operating Leases, Future Minimum Payments, Due in Three Years 2022 Operating Leases, Future Minimum Payments, Due in Four Years 2023 Operating Leases, Future Minimum Payments, Due in Five Years Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Total Operating Leases, Future Minimum Payments Due Schedule of accounts payable and accrued expenses Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Schedule of intangible assets by class Schedule of Finite-Lived Intangible Assets [Table Text Block] Schedule of segment reporting information Schedule of Segment Reporting Information, by Segment [Table Text Block] Assets Assets [Abstract] Cash and cash equivalents 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 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 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 Total liabilities Liabilities 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, 399.1 million and 398.9 million shares Treasury Stock, Value Total shareholders’ equity Total liabilities and shareholders’ equity Liabilities and Equity Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Shareholders' Equity Stockholders' Equity Note Disclosure [Text Block] Schedule of Stockholders Equity Schedule of Stockholders Equity [Table Text Block] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Foreign currency forward exchange contracts Foreign Exchange Contract [Member] Treasury Lock Treasury Lock [Member] Currency [Axis] Currency [Axis] All Currencies [Domain] All Currencies [Domain] Indian Rupee India, Rupees 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 Derivative liability, notional amount Derivative Liability, Notional Amount Fair value of cash flow hedge, derivative liability Derivative Liability Income Taxes Income Tax Disclosure [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] 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] Consideration from sale of business Disposal Group, Including Discontinued Operation, Consideration Investment [Table] Investment [Table] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Fair Value, Inputs, Level 1 Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 2 Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 3 Fair Value, Inputs, Level 3 [Member] Investment [Line Items] Investment [Line Items] Fair value of total debt Debt Instrument, Fair Value Disclosure Derivative liability, fair value Contingent consideration liability, fair value Fair value of line of credit Lines of Credit, Fair Value Disclosure Income Statement [Abstract] 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 on sale of business Total expenses Costs and Expenses Operating income Interest expense Interest Expense Debt financing activities Debt Related Commitment Fees and Debt Issuance Costs Income before income taxes and loss 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) Loss from investments in unconsolidated affiliates Net income 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)