Corporate and Other
Corporate Reconciling Items And Eliminations [Member]
Corporate Reconciling Items And Eliminations [Member]
Prepaid maintenance, postage and insurance
Prepaid Maintenance, Postage And Insurance
Prepaid Maintenance, Postage And Insurance
Adjustments to reconcile net income to net cash provided by operating activities:
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Statistical Measurement [Domain]
Statistical Measurement [Domain]
Merchant Segment
Merchant Segment [Member]
Merchant Segment
Related Party Transactions
Related Party Transactions Disclosure [Text Block]
Deferred costs, capitalized, prepaid, and other assets disclosure
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]
Cover [Abstract]
Cover [Abstract]
Net change in cash and cash equivalents
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect
Schedule of notional amounts of outstanding derivative positions
Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]
Trading Symbol
Trading Symbol
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Fair Value Hedging
Fair Value Hedging [Member]
Comprehensive income
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest
All Trading Arrangements
All Trading Arrangements [Member]
Long-term debt
Total long-term debt
Long-Term Debt and Lease Obligation
Compensation Actually Paid vs. Net Income
Compensation Actually Paid vs. Net Income [Text Block]
Non-NEOs
Non-NEOs [Member]
Rule 10b5-1 Arrangement Adopted
Rule 10b5-1 Arrangement Adopted [Flag]
Awards Close in Time to MNPI Disclosures
Awards Close in Time to MNPI Disclosures [Table]
Income taxes paid
Income Taxes Paid, Net
Goodwill
Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]
Distributions paid to noncontrolling interests
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders
$5.150% senior notes due March 2027
5.150% Senior Notes Due March 2027 [Member]
5.150% Senior Notes Due March 2027
Disposal Group Name [Domain]
Disposal Group Name [Domain]
Investments in unconsolidated affiliates
Equity Method Investments
Pay vs Performance Disclosure [Line Items]
Redeemable Noncontrolling Interest
Balance at beginning of period
Balance at end of period
Redeemable Noncontrolling Interest, Equity, Carrying Amount
Peer Group Total Shareholder Return Amount
Peer Group Total Shareholder Return Amount
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]
Trade accounts receivable
Increase (Decrease) in Accounts Receivable
First Data Joint Venture
First Data Joint Venture [Member]
First Data Joint Venture [Member]
Non-Rule 10b5-1 Arrangement Adopted
Non-Rule 10b5-1 Arrangement Adopted [Flag]
Hedging Relationship [Domain]
Hedging Relationship [Domain]
Award Timing Disclosures [Line Items]
Net Investment Hedging
Net Investment Hedging [Member]
Investment, Name [Domain]
Investment, Name [Domain]
Other Performance Measure, Amount
Other Performance Measure, Amount
Common shares balance at beginning of period (in shares)
Common shares balance at end of period (in shares)
Common Stock, Shares, Outstanding
Portion at Fair Value Measurement
Portion at Fair Value Measurement [Member]
Defined benefit plan, actuarial gain (loss), immediate recognition as component in net periodic benefit (cost) credit
Defined Benefit Plan, Actuarial Gain (Loss), Immediate Recognition as Component in Net Periodic Benefit (Cost) Credit
3.500% senior notes due July 2029
3.5% Senior Notes Due July 2029 [Member]
3.5% Senior Notes Due July 2029 [Member]
Reclassification to current liability
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests
Segment Realignment
Segment Reporting, Policy [Policy Text Block]
Revenue from Contract with Customer [Abstract]
Contract liabilities
Contract with Customer, Liability, Current
Common stock equivalents (in shares)
Weighted Average Number of Shares Outstanding, Diluted, Adjustment
Uruguay
URUGUAY
Proceeds from issuance of treasury stock
Proceeds from Issuance or Sale of Equity
Other long-term assets
Other Assets, Noncurrent
Entity Tax Identification Number
Entity Tax Identification Number
Gross Carrying Amount
Finite-Lived Intangible Assets, Gross
Schedule of Finite-Lived Intangible Assets [Table]
Intangible Asset, Finite-Lived [Table]
Purchases of treasury stock (in shares)
Treasury Stock, Shares, Acquired
Operating segments
Operating Segments [Member]
3.200% senior notes due July 2026
3.2% Senior Notes Due July 2026 [Member]
3.2% Senior Notes Due July 2026 [Member]
Net cash provided by operating activities
Net Cash Provided by (Used in) Operating Activities
Treasury Stock
Treasury Stock, Common [Member]
Cash flows from operating activities:
Net Cash Provided by (Used in) Operating Activities [Abstract]
Accrued taxes
Taxes Payable, Current
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Settlement Assets and Obligations
Settlement Assets And Obligations, Policy [Policy Text Block]
Settlement Assets And Obligations, Policy
Changes in accumulated other comprehensive loss by component, net of income taxes
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Net income attributable to Fiserv, Inc. per share:
Earnings Per Share Reconciliation [Abstract]
Total prepaid expenses
Prepaid Expense, Current
Equity Components [Axis]
Equity Components [Axis]
Total other current assets
Other Assets, Current
Award Timing Method
Award Timing Method [Text Block]
Trading Arrangements, by Individual
Trading Arrangements, by Individual [Table]
Trade names
Trade Names [Member]
Defined Benefit Pension Plans
Pension and Other Postretirement Plans, Pensions, Policy [Policy Text Block]
Noncontrolling Interest [Line Items]
Noncontrolling Interest [Line Items]
Measurement Frequency [Axis]
Measurement Frequency [Axis]
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Insider Trading Policies and Procedures [Line Items]
Net proceeds from sale of businesses and other assets
Proceeds from Divestiture of Businesses
Use of Estimates
Use of Estimates, Policy [Policy Text Block]
Total expenses
Costs and Expenses
Business Acquisition, Acquiree [Domain]
Business Acquisition, Acquiree [Domain]
Investments in and Advances to Affiliates [Table]
Investments in and Advances to Affiliates [Table]
Contingent debt guarantee
Guarantees, Fair Value Disclosure
Adjustment to Compensation, Amount
Adjustment to Compensation Amount
First Data Subsidiary Merchant Matters
First Data Subsidiary Merchant Matters [Member]
First Data Subsidiary Merchant Matters [Member]
Stock options outstanding
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value
Additional paid-in capital
Additional Paid in Capital, Common Stock
Payables and Accruals [Abstract]
Payables and Accruals [Abstract]
Compensation Amount
Outstanding Recovery Compensation Amount
Disposal Group Classification [Axis]
Disposal Group Classification [Axis]
Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table
Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member]
Entity Small Business
Entity Small Business
Accounts Payable and Other Current Liabilities
Accounts Payable and Accrued Liabilities Disclosure [Text Block]
Company Selected Measure Amount
Company Selected Measure Amount
Geographical [Axis]
Geographical [Axis]
Tabular List, Table
Tabular List [Table Text Block]
Level 3
Fair Value, Inputs, Level 3 [Member]
Gain (loss) on disposition of business
Gain (Loss) on Disposition of Business
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table
Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member]
Contingent consideration
Business Combination, Contingent Consideration, Liability, Current
Loss contingency accrual
Loss Contingency Accrual
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 remaining performance obligations
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]
Credit Facility [Domain]
Credit Facility [Domain]
Cash and cash equivalents, beginning balance
Cash and cash equivalents, ending balance
Total cash and cash equivalents on the consolidated statements of cash flows
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents
Weighted-Average Interest Rate
Debt, Weighted Average Interest Rate
Unrecognized compensation cost
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount
2.250% senior notes due July 2025 (British Pound-denominated)
2.25% Senior Notes Due July 2025 [Member]
2.25% Senior Notes Due July 2025 [Member]
Settlement activity, net
Proceeds From (Payments For) Settlement Activity
Proceeds From (Payments For) Settlement Activity
Goodwill
Goodwill
Foreign currency translation loss
Translation Adjustment Functional to Reporting Currency, Increase (Decrease), Gross of Tax
Consolidation Items [Axis]
Consolidation Items [Axis]
Allowance for doubtful accounts
Accounts Receivable, Allowance for Credit Loss
Other comprehensive (loss) income:
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Capitalized software and other intangibles
Capitalized Software Development Costs [Member]
Internally developed software for sale, licensing or long-term internal use (classified as intangible assets).
Treasury stock (in shares)
Treasury shares balance at beginning of period (in shares)
Treasury shares balance at end of period (in shares)
Treasury Stock, Common, Shares
Forgone Recovery due to Disqualification of Tax Benefits, Amount
Forgone Recovery due to Disqualification of Tax Benefits, Amount
Product and Service [Domain]
Product and Service [Domain]
Employee Stock Option
Share-Based Payment Arrangement, Option [Member]
Schedule of net investment hedges in accumulated other comprehensive income (loss)
Schedule of Net Investment Hedges in Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Vested (in dollars per share)
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Table]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Table]
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Abstract]
Other financing activities
Proceeds from (Payments for) Other Financing Activities
Comprehensive income attributable to Fiserv, Inc.
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Foreign Banks and Alliance Partners
Foreign Banks And Alliance Partners [Member]
Foreign Banks And Alliance Partners
Security Exchange Name
Security Exchange Name
Basis spread on variable rate
Debt Instrument, Basis Spread on Variable Rate
Award Type [Axis]
Award Type [Axis]
Related Party Transaction [Domain]
Related Party Transaction [Domain]
Prepaid Expenses and Other Current Assets
Prepaid Expenses And Other Current Assets [Policy Text Block]
Prepaid Expenses And Other Current Assets
Exercised (in dollars per share)
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price
Less: other comprehensive (loss) income attributable to noncontrolling interests
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest
Weighted-Average Grant Date Fair Value
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Property and equipment, net
Property, Plant and Equipment, Net
Total liabilities
Liabilities
Noncontrolling interests
Equity, Attributable to Noncontrolling Interest
Schedule of cash and cash equivalents
Schedule of Cash and Cash Equivalents [Table Text Block]
Outstanding Borrowings
Short-Term Debt
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.
Stock options exercisable (in dollars per share)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price
Cross-currency rate swap contract
Foreign Currency Contracts, Liability, Fair Value Disclosure
Client deposits
Contract With Customer, Liability, Customer Deposits, Current
Contract With Customer, Liability, Customer Deposits, Current
Common stock, par value (in dollars per share)
Common Stock, Par or Stated Value Per Share
Forgone Recovery, Explanation of Impracticability
Forgone Recovery, Explanation of Impracticability [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]
Foreign Currency
Foreign Currency Transactions and Translations Policy [Policy Text Block]
Revolving Credit Facility
Revolving credit facility
Revolving Credit Facility [Member]
Expiration Date
Trading Arrangement Expiration Date
Right-of-use assets obtained in exchange for lease liabilities - finance leases
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability
Cash flows from investing activities:
Net Cash Provided by (Used in) Investing Activities [Abstract]
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets Disclosure [Abstract]
Operating lease liabilities
Operating Lease, Liability, Current
Equity investments
Equity Method Investee [Member]
Total Shareholder Return Amount
Total Shareholder Return Amount
Euro commercial paper notes
Euro Unsecured Commercial Paper Notes [Member]
Euro Unsecured Commercial Paper Notes
Common stock, shares issued (in shares)
Common Stock, Shares, Issued
Entity [Domain]
Entity [Domain]
Equity Awards Adjustments, Footnote
Equity Awards Adjustments, Footnote [Text Block]
Maximum borrowing capacity
Line of Credit Facility, Maximum Borrowing Capacity
Percentage of concentration risk
Concentration Risk, Percentage
Disposal group, including discontinued operation, trade receivable and capitalized software
Disposal Group, Including Discontinued Operation, Trade Receivable And Capitalized Software
Disposal Group, Including Discontinued Operation, Trade Receivable And Capitalized Software
Insider Trading Policies and Procedures Adopted
Insider Trading Policies and Procedures Adopted [Flag]
Exercised (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period
Fair market value adjustment on derivatives
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax
Software obtained under financing arrangements
Financed Software Arrangements
Financed Software Arrangements
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Named Executive Officers, Footnote
Named Executive Officers, Footnote [Text Block]
Weighted-Average Exercise Price
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
U.S. dollar commercial paper notes
U.S. Unsecured Commercial Paper Notes [Member]
U.S. Unsecured Commercial Paper Notes
Common stock, shares authorized (in shares)
Common Stock, Shares Authorized
Basis of Presentation
Basis of Accounting, Policy [Policy Text Block]
Diluted (in shares)
Weighted-average common shares outstanding used for the calculation of net income attributable to Fiserv, Inc. per share – diluted (in shares)
Weighted Average Number of Shares Outstanding, Diluted
Variable-Rate Revolving Credit Facilities Due April 2027
Variable-Rate Revolving Credit Facilities Due April 2027 [Member]
Variable-Rate Revolving Credit Facilities Due March 2023 [Member]
MNPI Disclosure Timed for Compensation Value
MNPI Disclosure Timed for Compensation Value [Flag]
Long-term Debt, Type [Axis]
Long-Term Debt, Type [Axis]
Total Fiserv, Inc. shareholders’ equity
Equity, Attributable to Parent
Schedule of supplemental cash flow information
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]
Share of income
Temporary Equity, Net Income
Litigation Case [Axis]
Litigation Case [Axis]
Balance Sheet Location [Axis]
Statement of Financial Position Location, Balance [Axis]
Interest expense, net
Interest Expense, Nonoperating
Deferred income taxes
Deferred Income Tax Expense (Benefit)
Payments of acquisition-related contingent consideration
Payment for Contingent Consideration Liability, Financing Activities
Reclassification adjustment for net realized (gains) losses on cash flow hedges
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax
Concentration Risk Type [Domain]
Concentration Risk Type [Domain]
Selling, general and administrative
Selling, General and Administrative Expense
Total short-term and current maturities of long-term debt
Debt, Current
Fair Value, Recurring
Fair Value, Recurring [Member]
Restricted Stock Units and Awards
Restricted Stock Units And Restricted Stock Awards [Member]
Restricted Stock Units And Restricted Stock Awards
Trade accounts receivable, less allowance for doubtful accounts
Amounts due from unconsolidated merchant alliances
Accounts Receivable, after Allowance for Credit Loss, Current
Financial Segment
Financial Segment [Member]
Financial Segment
Granted (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross
Term Loan Facilities
Term Loan Facilities [Member]
Term Loan Facility [Member]
Product
Product revenue
Product [Member]
Investments in and Advances to Affiliates [Line Items]
Investments in and Advances to Affiliates [Line Items]
Obligation to purchase redeemable noncontrolling interest
Mandatorily Redeemable Preferred Stock, Fair Value Disclosure
Non-cash impairment charges
Asset Impairment Charges
Long-term debt
Long-Term Debt
Pension Adjustments Prior Service Cost
Pension Adjustments Prior Service Cost [Member]
Document Fiscal Period Focus
Document Fiscal Period Focus
Merchant credit losses
Merchant Credit Losses [Member]
Merchant Credit Losses [Member]
All Executive Categories
All Executive Categories [Member]
Balance Sheet Location [Domain]
Statement of Financial Position Location, Balance [Domain]
Changed Peer Group, Footnote
Changed Peer Group, Footnote [Text Block]
Stock options outstanding (in years)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term
Acquisitions and Dispositions
Mergers, Acquisitions and Dispositions Disclosures [Text Block]
Assets
Assets [Abstract]
Total other comprehensive (loss) income
Other comprehensive income (loss)
Other Comprehensive Income (Loss), Net of Tax
Document Type
Document Type
Derivative Contract [Domain]
Derivative Contract [Domain]
Commercial Paper
Commercial Paper [Member]
Pension Benefits Adjustments, Footnote
Pension Benefits Adjustments, Footnote [Text Block]
Schedule of segment reporting information
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Total Shareholder Return Vs Peer Group
Total Shareholder Return Vs Peer Group [Text Block]
Other
Other [Member]
Other
Purchased software
Computer Software, Intangible Asset [Member]
Number of redeemable noncontrolling interests
Number Of Redeemable Noncontrolling Interests
Number Of Redeemable Noncontrolling Interests
Stock options exercisable (in years)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term
4.500% senior notes due May 2031 (Euro-denominated)
4.500% Senior Notes Due May 2031 [Member]
4.500% Senior Notes Due May 2031
Vested (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period
Contract with customer, asset and liabilities
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]
Maximum
Maximum [Member]
Amortization of intangible assets
Amortization of Intangible Assets
Contract liabilities
Contract with Customer, Liability
Equity Valuation Assumption Difference, Footnote
Equity Valuation Assumption Difference, Footnote [Text Block]
Accumulated impairment loss
Goodwill, Impaired, Accumulated Impairment Loss
Payments of debt financing costs
Payments of Financing Costs
Amortization of financing costs and debt discounts
Amortization Of Debt Issuance Costs, Discounts And Other
Amortization Of Debt Issuance Costs, Discounts And Other
Intangible assets, net
Net Book Value
Finite-Lived Intangible Assets, Net
Trade accounts payable
Accounts Payable, Current
Non-US
Non-US [Member]
Frank Bisignano [Member]
Frank Bisignano
Accounting Policies [Abstract]
Accounting Policies [Abstract]
2.750% senior notes due July 2024
2.75% Senior Notes Due July 2024 [Member]
2.75% Senior Notes Due July 2024 [Member]
Net income attributable to redeemable noncontrolling interest
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest
Fair Value Measurements
Fair Value Measurement, Policy [Policy Text Block]
Digital Payments
Digital Payments [Member]
Digital Payments
Current Fiscal Year End Date
Current Fiscal Year End Date
Accounts payable and other current liabilities
Accounts Payable and Other Accrued Liabilities, Current
Statistical Measurement [Axis]
Statistical Measurement [Axis]
Allowance for credit loss, current
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Current
PEO Name
PEO Name
Non-Rule 10b5-1 Arrangement Terminated
Non-Rule 10b5-1 Arrangement Terminated [Flag]
Non-PEO NEO Average Total Compensation Amount
Non-PEO NEO Average Total Compensation Amount
Award Type [Domain]
Award Type [Domain]
Name
Outstanding Recovery, Individual Name
Shares issued under stock plans (in shares)
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Line Items]
Compensation Actually Paid vs. Company Selected Measure
Compensation Actually Paid vs. Company Selected Measure [Text Block]
Non-PEO NEO
Non-PEO NEO [Member]
Disposal group, including discontinued operation, goodwill
Disposal Group, Including Discontinued Operation, Goodwill
Additional Paid-In Capital
Additional Paid-in Capital [Member]
Hedging Relationship [Axis]
Hedging Relationship [Axis]
Award Timing Predetermined
Award Timing Predetermined [Flag]
Contract costs
Increase (Decrease) in Contract with Customer, Asset
Debt repayments
Repayment of Long-Term Debt, Long-Term Lease Obligation, and Capital Security
Foreign currency translation
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax
Class of Stock [Line Items]
Class of Stock [Line Items]
Brazil
BRAZIL
Investment, Name [Axis]
Investment, Name [Axis]
Recent Accounting Pronouncements
New Accounting Pronouncements, Policy [Policy Text Block]
Forecast
Forecast [Member]
Debt
Long-Term Debt [Text Block]
Diluted (in dollars per share)
Earnings Per Share, Diluted
Class of Stock [Axis]
Class of Stock [Axis]
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets by Major Class [Axis]
Accumulated Amortization
Finite-Lived Intangible Assets, Accumulated Amortization
Counterparty Name [Domain]
Counterparty Name [Domain]
Computation of shares used in calculating basic and diluted net income per common share
Schedule of Weighted Average Number of Shares [Table Text Block]
Name
Measure Name
Entity Interactive Data Current
Entity Interactive Data Current
3.850% senior notes due June 2025
3.85% Senior Notes Due June 2025 [Member]
3.85% Senior Notes Due 2025 [Member]
Contract liabilities
Increase (Decrease) in Contract with Customer, Liability
Accrued compensation and benefits
Accrued Employee Benefits, Current
Restatement does not require Recovery
Restatement Does Not Require Recovery [Text Block]
Ownership [Axis]
Ownership [Axis]
Change in fair value of cross-currency rate swaps
Gain (Loss), Foreign Currency Transaction, before Tax
Preferred stock, shares issued (in shares)
Preferred Stock, Shares Issued
Schedule of fair value, assets and liabilities measured on recurring basis
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
Disaggregation of Revenue [Table]
Disaggregation of Revenue [Table]
Statement of Financial Position [Abstract]
Statement of Financial Position [Abstract]
Share-based compensation
Share-Based Payment Arrangement, Noncash Expense
Forward exchange contracts designated as cash flow hedges
Cash Flow Hedge Derivative Instrument Assets at Fair Value
3.000% Senior Notes due 2031
Three Point Zero Percent Senior Notes Due 2031 [Member]
Three Point Zero Percent Senior Notes Due 2031
Argentina
ARGENTINA
Enterprise
Enterprise [Member]
Enterprise
Net income
Net income
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Pension Plans
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Guarantor Obligations, Nature [Domain]
Guarantor Obligations, Nature [Domain]
Income tax provision
Tax expense
Income tax provision
Income Tax Expense (Benefit)
Debt instrument, interest rate
Interest rate, stated percentage
Debt Instrument, Interest Rate, Stated Percentage
Derivative, notional amount
Notional amount of derivatives
Derivative, Notional Amount
Weighted-average period unrecognized compensation cost will be recognized (in years)
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition
Investments in and Advances to Affiliates [Abstract]
Other (expense) income
Nonoperating Income (Expense)
Statement of Comprehensive Income [Abstract]
Statement of Comprehensive Income [Abstract]
Concentration Risk Benchmark [Domain]
Concentration Risk Benchmark [Domain]
Effective income tax rate
Effective Income Tax Rate Reconciliation, Percent
Net cash used in investing activities
Net Cash Provided by (Used in) Investing Activities
Operating income
Operating income (loss)
Operating Income (Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Interest expense
Interest Expense, Operating and Nonoperating
Business Acquisition [Line Items]
Business Acquisition [Line Items]
Total liabilities and equity
Liabilities and Equity
Other operating activities
Other Operating Activities, Cash Flow Statement
All Adjustments to Compensation
All Adjustments to Compensation [Member]
Rule 10b5-1 Arrangement Terminated
Rule 10b5-1 Arrangement Terminated [Flag]
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Axis]
Prepaid expenses and other assets
Increase (Decrease) in Prepaid Expense and Other Assets
Short-term Debt, Type [Domain]
Short-Term Debt, Type [Domain]
Derivatives and Hedging Instruments
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Noncontrolling Interest [Table]
Noncontrolling Interest [Table]
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Abstract]
Legal Entity [Axis]
Legal Entity [Axis]
Interest income
Investment Income, Interest
Short-term and current maturities of long-term debt
Long-Term Debt and Lease Obligation, Current
Finite-Lived Intangible Assets, Major Class Name [Domain]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Related Party Fees
Related Party Fees [Member]
Related Party Fees [Member]
Disposal Group, Disposed of by Sale
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Right-of-use assets obtained in exchange for lease liabilities - operating leases
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability
Underlying Security Market Price Change
Underlying Security Market Price Change, Percent
Scenario [Domain]
Scenario [Domain]
Individual:
Individual [Axis]
Common stock, $0.01 par value: 1,800 million shares authorized; 784 million shares issued
Common Stock, Value, Outstanding
Related Party Transaction [Axis]
Related Party Transaction [Axis]
Accumulated Other Comprehensive Loss
Total
AOCI Attributable to Parent [Member]
Forfeited (in dollars per share)
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price
Performance obligations expected to be satisfied, expected timing
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period
Derivatives
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Long-term Debt, Type [Domain]
Long-Term Debt, Type [Domain]
Product and Service [Axis]
Product and Service [Axis]
Entity Address, State or Province
Entity Address, State or Province
Adjustment to estimated redemption value of redeemable noncontrolling interest
Change in estimated redemption value of redeemable noncontrolling interest (see Note 11)
Noncontrolling Interest, Change in Redemption Value
Statement [Line Items]
Statement [Line Items]
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Erroneous Compensation Analysis
Erroneous Compensation Analysis [Text Block]
Schedule of stockholders equity
Schedule of Stockholders Equity [Table Text Block]
Compensation Actually Paid vs. Total Shareholder Return
Compensation Actually Paid vs. Total Shareholder Return [Text Block]
Payments for acquisitions of businesses
Business Combination, Consideration Transferred
Balance at beginning of period (in dollars per share)
Balance at end of period (in dollars per share)
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Liabilities and Equity
Liabilities and Equity [Abstract]
Derivatives
Derivatives, Policy [Policy Text Block]
Finance lease and other financing obligations
Finance Lease, Liability And Other, Current
Finance Lease, Liability And Other, Current
Allowance for Doubtful Accounts
Credit Loss, Financial Instrument [Policy Text Block]
Preferred stock, par value (in dollars per share)
Preferred Stock, No Par Value
Estimated range of exposure
Loss Contingency, Estimate of Possible Loss
Unamortized discount and deferred financing costs
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net
Minimum
Minimum [Member]
Restatement Determination Date
Restatement Determination Date
Fair value
Estimate of Fair Value Measurement [Member]
Pay vs Performance Disclosure
Pay vs Performance Disclosure [Table]
Adoption Date
Trading Arrangement Adoption Date
Related Party Transactions [Abstract]
Related Party Transactions [Abstract]
Long-term contract liabilities
Contract with Customer, Liability, Noncurrent
Banking
Banking [Member]
Stock options outstanding - balance at beginning of period (in dollars per shares)
Stock options outstanding - balance at end of period (in dollars per shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price
5.375% senior notes due August 2028
5.375% Senior Notes Due August 2028 [Member]
5.375% Senior Notes Due August 2028
Erroneously Awarded Compensation Recovery
Erroneously Awarded Compensation Recovery [Table]
Stock options outstanding - balance at beginning of period (in shares)
Stock options outstanding - balance at end of period (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number
Tax impacts of foreign currency translation
Foreign currency translation adjustment, tax
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax
Short-term Debt, Type [Axis]
Short-Term Debt, Type [Axis]
Segments [Axis]
Segments [Axis]
Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year
Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member]
Derivative Instrument [Axis]
Derivative Instrument [Axis]
Long-term debt
Outstanding borrowings
Long-Term Debt, Gross
Distributions from unconsolidated affiliates
Proceeds from Equity Method Investment, Distribution, Return of Capital
2.250% Senior Notes due 2025
Senior Notes Due 2025 [Member]
Senior Notes Due 2025 [Member]
Exercise Price
Award Exercise Price
Shares Used in Computing Net Income Per Share Attributable to Fiserv, Inc.
Earnings Per Share [Text Block]
Arrangement Duration
Trading Arrangement Duration
1.125% senior notes due July 2027 (Euro-denominated)
1.125% Senior Notes Due July 2027 [Member]
1.125% Senior Notes Due July 2027 [Member]
Fiserv, Inc. Shareholders’ Equity:
Equity, Attributable to Parent [Abstract]
Granted (in dollars 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
2.250% senior notes due June 2027
2.25% Senior Notes Due June 2027 [Member]
2.25% Senior Notes Due 2027 [Member]
Peer Group Issuers, Footnote
Peer Group Issuers, Footnote [Text Block]
Segments [Domain]
Segments [Domain]
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.
Material Terms of Trading Arrangement
Material Terms of Trading Arrangement [Text Block]
Debt maturities (in days)
Debt Instrument, Term
All Individuals
All Individuals [Member]
Basis of Presentation and Summary of Significant Accounting Policies
Basis of Presentation and Significant Accounting Policies [Text Block]
Depreciation and other amortization
Other Depreciation and Amortization
PEO
PEO [Member]
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Abstract]
Total debt
Debt Instrument, Fair Value Disclosure
Name
Trading Arrangement, Individual Name
Other expense, net
Other Nonoperating Income (Expense)
Disposal Group Name [Axis]
Disposal Group Name [Axis]
Treasury stock, at cost, 207 million and 190 million shares, respectively
Treasury Stock, Common, Value
(Loss) income from investments in unconsolidated affiliates
Loss from investments in unconsolidated affiliates
Income (Loss) from Equity Method Investments
Income before income taxes and (loss) income from investments in unconsolidated affiliates
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest
Summary of restricted stock and performance activity
Schedule Of Share-Based Compensation, Restricted Stock Units, Restricted Stock Awards, Performance Share Units And Performance Share Awards Activity [Table Text Block]
Schedule Of Share-Based Compensation, Restricted Stock Units, Restricted Stock Awards, Performance Share Units And Performance Share Awards Activity [Table Text Block]
Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract]
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.
Awards Close in Time to MNPI Disclosures, Table
Awards Close in Time to MNPI Disclosures [Table Text Block]
Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year
Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member]
Related Party [Domain]
Related and Nonrelated Parties [Domain]
Decrease in unrecognized tax benefits reasonably possible
Decrease in Unrecognized Tax Benefits is Reasonably Possible
Total
Accounts Payable and Accrued Liabilities, Current
Aggregate Erroneous Compensation Amount
Aggregate Erroneous Compensation Amount
Local Phone Number
Local Phone Number
Prepaid expenses and other current assets
Prepaid Expenses and Other Current Assets [Member]
Other current assets
Other Assets, Miscellaneous, Current
Merchant cash advances, net
Payments For Merchant Cash Advances
Payments For Merchant Cash Advances
Aggregate Erroneous Compensation Not Yet Determined
Aggregate Erroneous Compensation Not Yet Determined [Text Block]
Foreign lines of credit
Foreign Line of Credit [Member]
Carrying value of non-contingent liability
Guarantor Obligations, Current Carrying Value
Deferred income taxes
Deferred Income Tax Liabilities, Net
Weighted-Average Remaining Contractual Term (Years)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Additional Disclosures [Abstract]
Cash advances
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current
Finance lease and other financing obligations
Finance Lease, Liability And Other, Noncurrent
Finance Lease, Liability And Other, Noncurrent
Changes in assets and liabilities, net of effects from acquisitions and dispositions:
Increase (Decrease) in Operating Capital [Abstract]
PEO Total Compensation Amount
PEO Total Compensation Amount
Accrued interest
Interest Payable, Current
Cash and Cash Equivalents
Cash and Cash Equivalents, Policy [Policy Text Block]
Commitments and Contingencies
Commitments and Contingencies Disclosure [Text Block]
Debt Disclosure [Abstract]
Debt Disclosure [Abstract]
Common Stock, par value $0.01 per share
Common Shares
Common Stock [Member]
Measure:
Measure [Axis]
Shares issued under stock plans
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture
Preferred stock, shares authorized (in shares)
Preferred Stock, Shares Authorized
Forgone Recovery due to Expense of Enforcement, Amount
Forgone Recovery due to Expense of Enforcement, Amount
Schedule of Business Acquisitions, by Acquisition [Table]
Schedule of Business Acquisitions, by Acquisition [Table]
3.000% senior notes due July 2031 (British Pound-denominated)
3.0% Senior Notes Due July 2031 [Member]
3.0% Senior Notes Due July 2031 [Member]
Line of Credit
Line of Credit [Member]
Entity Emerging Growth Company
Entity Emerging Growth Company
Segment Reporting [Abstract]
Segment Reporting [Abstract]
Entity Central Index Key
Entity Central Index Key
Scenario [Axis]
Scenario [Axis]
Non-GAAP Measure Description
Non-GAAP Measure Description [Text Block]
Foreign Currency Translation
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Skytef and Sled
Skytef and Sled [Member]
Skytef and Sled
Non-PEO NEO Average Compensation Actually Paid Amount
Non-PEO NEO Average Compensation Actually Paid Amount
Schedule of accounts payable and accrued expenses
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]
Equity
Equity [Text Block]
Accounts payable and other liabilities
Increase (Decrease) in Accounts Payable and Accrued Liabilities
Award Timing, How MNPI Considered
Award Timing, How MNPI Considered [Text Block]
Equity Component [Domain]
Equity Component [Domain]
Distributions paid to redeemable noncontrolling interest
Distributions paid to redeemable noncontrolling interests
Noncontrolling Interest, Decrease From Distributions To Redeemable Noncontrolling Interest Holders
Noncontrolling Interest, Decrease From Distributions To Redeemable Noncontrolling Interest Holders
Business Segment Information
Segment Reporting Disclosure [Text Block]
4.400% senior notes due July 2049
4.4% Senior Notes Due July 2049 [Member]
4.4% Senior Notes Due July 2049 [Member]
Additional 402(v) Disclosure
Additional 402(v) Disclosure [Text Block]
Amounts reclassified from accumulated other comprehensive loss
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax
Share-based compensation
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition
Recent Accounting Pronouncements
Accounting Standards Update and Change in Accounting Principle [Text Block]
Entity Shell Company
Entity Shell Company
Measurement Basis [Axis]
Measurement Basis [Axis]
Entity Incorporation, State or Country Code
Entity Incorporation, State or Country Code
Foreign currency-denominated debt
Foreign Currency-Denominated Debt [Member]
Foreign Currency-Denominated Debt
Contract costs, net
Capitalized Contract Cost, Net
Aggregate merchant credit loss expense
Loss Contingency, Loss in Period
Title
Trading Arrangement, Individual Title
Guarantor Obligations, Nature [Axis]
Guarantor Obligations, Nature [Axis]
Statement [Table]
Statement [Table]
Cash and cash equivalents included in settlement assets
Settlement Assets, Current, Cash And Cash Equivalents
Settlement Assets, Current, Cash And Cash Equivalents
Measurement Frequency [Domain]
Measurement Frequency [Domain]
Counterparty Name [Axis]
Counterparty Name [Axis]
Pension and other postretirement benefits expense (reversal of expense), noncash
Pension and Other Postretirement Benefits Expense (Reversal of Expense), Noncash
Unrecognized tax benefits
Unrecognized Tax Benefits
Geographic Concentration Risk
Geographic Concentration Risk [Member]
Consolidation Items [Domain]
Consolidation Items [Domain]
City Area Code
City Area Code
Treasury stock purchases settled after the balance sheet date
Treasury Stock Purchases Settled After Balance Sheet Date
Treasury Stock Purchases Settled After Balance Sheet Date
Interest paid
Interest Paid, Excluding Capitalized Interest, Operating Activities
Financial Guarantee
Financial Guarantee [Member]
Interest expense, net
Interest Income (Expense), Operating and Nonoperating
Disposal Group Classification [Domain]
Disposal Group Classification [Domain]
Revenue Recognition
Revenue [Policy Text Block]
Insider Trading Policies and Procedures Not Adopted
Insider Trading Policies and Procedures Not Adopted [Text Block]
Foreign currency translation
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Axis]
$5.350% senior notes due March 2031
5.350% Senior Notes Due March 2031 [Member]
5.350% Senior Notes Due March 2031
Total current assets
Assets, Current
Net loss on sale of businesses and other assets
Gain (Loss) on Disposition of Assets
Schedule of interest expense, net
Interest Income and Interest Expense Disclosure [Table Text Block]
Statement of Cash Flows [Abstract]
Statement of Cash Flows [Abstract]
Senior Notes
Senior Notes [Member]
Aggregate Intrinsic Value (In millions)
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Aggregate Intrinsic Value [Abstract]
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Aggregate Intrinsic Value
Stock options exercisable (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number
Issuing
Issuing [Member]
Issuing
Document Information [Line Items]
Document Information [Line Items]
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-Term Debt Instruments [Table]
Schedule of Segment Reporting Information, by Segment [Table]
Schedule of Segment Reporting Information, by Segment [Table]
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
Shares (In thousands)
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Accumulated Other Comprehensive Income (Loss) [Table]
Accumulated Other Comprehensive Income (Loss) [Table]
Equity securities without a readily determinable fair value
Equity Securities without Readily Determinable Fair Value, Amount
Other intangible assets, net
Other Intangible Assets [Member]
Income Taxes
Income Tax Disclosure [Text Block]
Shares used in computing net income attributable to Fiserv, Inc. per share:
Earnings Per Share [Abstract]
Equity [Abstract]
Equity [Abstract]
Debt instrument, covenant, debt-to-EBITDA ratio
Debt Instrument, Covenant, Debt-To-EBITDA Ratio
Debt Instrument, Covenant, Debt-To-EBITDA Ratio
Retained earnings
Retained Earnings (Accumulated Deficit)
Processing and services
Processing and services revenue
Processing And Services [Member]
Processing And Services [Member]
Class of Stock [Domain]
Class of Stock [Domain]
Revenue from Contract with Customer Benchmark
Revenue from Contract with Customer Benchmark [Member]
Related Party Transaction [Line Items]
Related Party Transaction [Line Items]
Net income (loss)
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Elements [Abstract]
Schedule of debt, net of discounts and debt issuance costs
Schedule of Debt [Table Text Block]
5.450% senior notes due March 2028
5.45% Senior Notes Due March 2028 [Member]
5.45% Senior Notes Due March 2028
Other long-term liabilities
Other Noncurrent Liabilities [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Aggregate Available
Trading Arrangement, Securities Aggregate Available Amount
Schedule of short-term debt
Schedule of Short-Term Debt [Table Text Block]
Equity Awards Adjustments
Equity Awards Adjustments [Member]
Net borrowings from (repayments of) commercial paper and short-term borrowings
Proceeds from (Repayments of) Short-Term Debt
Net cash used in financing activities
Net Cash Provided by (Used in) Financing Activities
Underlying Securities
Award Underlying Securities Amount
Performance Share Units
Performance Shares [Member]
Unrealized (loss) gain on defined benefit pension plans
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax
Accounting Changes and Error Corrections [Abstract]
Accounting Changes and Error Corrections [Abstract]
Credit Facility [Axis]
Credit Facility [Axis]
5.600% senior notes due March 2033
5.6% Senior Notes Due March 2033 [Member]
5.6% Senior Notes Due March 2033
Amendment Flag
Amendment Flag
Carrying value
Reported Value Measurement [Member]
Loss Contingency Nature [Axis]
Loss Contingency Nature [Axis]
Entity Registrant Name
Entity Registrant Name
Adjustment to Non-PEO NEO Compensation Footnote
Adjustment to Non-PEO NEO Compensation Footnote [Text Block]
Stock Appreciation Rights (SARs)
Stock Appreciation Rights (SARs) [Member]
Increase (Decrease) in Temporary Equity [Roll Forward]
Increase (Decrease) in Temporary Equity [Roll Forward]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table]
Restrictions on cash and cash equivalents
Restrictions on Cash and Cash Equivalents [Table Text Block]
Intangible Assets
Intangible Assets Disclosure [Text Block]
$5.450% senior notes due March 2034
5.450% Senior Notes Due March 2034 [Member]
5.450% Senior Notes Due March 2034
Fair Value as of Grant Date
Award Grant Date Fair Value
Affiliated entities
Affiliated Entity [Member]
Proceeds from sale of investments
Proceeds from Sale of Equity Securities, FV-NI
Accrued payment network fees
Accrued Payment Network Fees, Current
Accrued Payment Network Fees, Current
Cash Flow Information
Cash Flow, Supplemental Disclosures [Text Block]
Other comprehensive income (loss) before reclassifications
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax
Level 2
Fair Value, Inputs, Level 2 [Member]
Fair Value Hierarchy and NAV [Domain]
Fair Value Hierarchy and NAV [Domain]
Geographical [Domain]
Geographical [Domain]
Allowance for Merchant Credit Losses
Loss Contingencies, Policy [Policy Text Block]
Loss Contingencies, Policy [Policy Text Block]
Customer relationships, net
Customer relationships
Customer-Related Intangible Assets [Member]
Recovery of Erroneously Awarded Compensation Disclosure [Line Items]
Debt instrument, face amount
Debt Instrument, Face Amount
Disaggregation of revenue
Disaggregation of Revenue [Table Text Block]
Entity Address, Postal Zip Code
Entity Address, Postal Zip Code
Principles of Consolidation
Consolidation, Policy [Policy Text Block]
Distributions paid to noncontrolling interests and redeemable noncontrolling interest
Payments of Ordinary Dividends, Noncontrolling Interest
Restatement Determination Date:
Restatement Determination Date [Axis]
Title of 12(b) Security
Title of 12(b) Security
Concentration Risk Type [Axis]
Concentration Risk Type [Axis]
1.625% senior notes due July 2030 (Euro-denominated)
1.625% Senior Notes Due July 2030 [Member]
1.625% Senior Notes Due July 2030 [Member]
Processing
Processing [Member]
Processing [Member]
Share-based Payment Arrangement [Abstract]
Share-Based Payment Arrangement [Abstract]
Cash and cash equivalents
Cash and cash equivalents on the consolidated balance sheets
Cash and Cash Equivalents, at Carrying Value
Other investing activities
Payments for (Proceeds from) Other Investing Activities
Other long-term assets
Other Noncurrent Assets [Member]
Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested
Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets [Line Items]
Settlement obligations
Settlement Liabilities, Current
Forfeited (in dollars per share)
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value
Estimate of gains (losses) 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 Instruments and Hedging Activities Disclosures [Line Items]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Cash flows from financing activities:
Net Cash Provided by (Used in) Financing Activities [Abstract]
Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested
Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member]
Preferred stock, no par value: 25 million shares authorized; none issued
Preferred Stock, Value, Issued
Short-term and current maturities of long-term debt:
Debt, Current [Abstract]
4.500% Senior Notes Due 2031
Four Point Five Percent Senior Notes Due 2031 [Member]
Four Point Five Percent Senior Notes Due 2031
Collateral held
Loss Contingency, Collateral Held
Loss Contingency, Collateral Held
Shares
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward]
Redeemable Noncontrolling Interest
Noncontrolling Interest Disclosure [Text Block]
Fair Value Measurement [Domain]
Fair Value Measurement [Domain]
Basic (in dollars per share)
Earnings Per Share, Basic
Schedule of Short-Term Debt [Table]
Short-Term Debt [Table]
Merchants Utilizing Clover Capital Cash Advance Program
Merchants Utilizing Clover Capital Cash Advance Program [Member]
Merchants Utilizing Clover Capital Cash Advance Program
Adjustment To PEO Compensation, Footnote
Adjustment To PEO Compensation, Footnote [Text Block]
Award Timing MNPI Disclosure
Award Timing MNPI Disclosure [Text Block]
Other prepaid expenses
Other Prepaid Expense, Current
Ownership [Domain]
Ownership [Domain]
1.625% Senior Notes due 2030
Senior Notes Due 2030 [Member]
Senior Notes Due 2030 [Member]
Aggregate Pension Adjustments Service Cost
Aggregate Pension Adjustments Service Cost [Member]
Compensation Actually Paid vs. Other Measure
Compensation Actually Paid vs. Other Measure [Text Block]
Schedule of Stock by Class [Table]
Stock, Class of Stock [Table]
Transferrable federal tax credits
Transferrable Federal Tax Credit Payable, Current
Transferrable Federal Tax Credit Payable, Current
Total current liabilities
Liabilities, Current
Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year
Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member]
Total assets
Assets
Distributions from unconsolidated affiliates
Proceeds from Equity Method Investment, Distribution
Tax impacts of defined benefit pension plans
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, Tax
Cost of goods sold and services
Cost of Goods and Services Sold
Outstanding borrowings
Long-Term Line of Credit
Granted (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period
Tax impacts of derivatives
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax
Net income tax receivables
Income Taxes Receivable, Current
Capital expenditures, including capitalized software and other intangibles
Payments to Acquire Property, Plant, and Equipment
Other long-term liabilities
Other Liabilities, Noncurrent
Forgone Recovery due to Violation of Home Country Law, Amount
Forgone Recovery due to Violation of Home Country Law, Amount
Derivative Instruments and Hedging Activities Disclosures [Table]
Derivative Instruments and Hedging Activities Disclosures [Table]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Fair Value Measurements
Fair Value Measurement and Measurement Inputs, Recurring and Nonrecurring [Text Block]
Commitments and Contingencies (see Note 18)
Commitments and Contingencies
Prepaid Expenses and Other Current Assets [Line Items]
Prepaid Expenses and Other Current Assets [Line Items]
Prepaid Expenses and Other Current Assets [Line Items]
Termination Date
Trading Arrangement Termination Date
Accounts payable and accrued expenses
Accounts Payable and Accrued Liabilities [Member]
Schedule of Related Party Transactions, by Related Party [Table]
Related Party Transaction [Table]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Revenue
Processing, administrative, and other fees
Revenues
Share-Based Compensation
Share-Based Payment Arrangement [Text Block]
Entity Address, City or Town
Entity Address, City or Town
Debt proceeds
Proceeds from Issuance of Long-Term Debt
Interest Expense, Net
Interest Expense, Policy [Policy Text Block]
Debt Instrument [Axis]
Debt Instrument [Axis]
Summary of stock option activity
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
2.650% senior notes due June 2030
2.65% Senior Notes Due June 2030 [Member]
2.65% Senior Notes Due 2030 [Member]
Noncontrolling Interest [Abstract]
Noncontrolling Interest [Abstract]
Share-based compensation expense
Share-Based Payment Arrangement, Expense
Long-term debt:
Long-Term Debt, Other Disclosure [Abstract]
Net income attributable to Fiserv, Inc.
Net Income (Loss) Attributable to Parent
Net Income (Loss) Attributable to Parent
Trading Arrangement:
Trading Arrangement [Axis]
Variable-Rate Term Loan Facilities Due April 2027
Variable-Rate Term Loan Facilities Due April 2027 [Member]
Variable-Rate Term Loan Facilities Due March 2023 [Member]
Disposal group, including discontinued operation, accumulated foreign currency translation loss
Disposal Group, Including Discontinued Operation, Accumulated Foreign Currency Translation Loss
Disposal Group, Including Discontinued Operation, Accumulated Foreign Currency Translation Loss
Settlement assets
Settlement Assets, Current
Granted (in dollars per share)
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price
Accumulated Other Comprehensive Loss
Comprehensive Income (Loss) Note [Text Block]
Pay vs Performance Disclosure, Table
Pay vs Performance [Table Text Block]
Loss Contingencies [Table]
Loss Contingencies [Table]
Forfeited (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period
Business Acquisition [Axis]
Business Acquisition [Axis]
Schedule of intangible assets by class
Schedule of Finite-Lived Intangible Assets [Table Text Block]
Defined benefit plan, cost of providing special and contractual termination benefits
Defined Benefit Plan, Cost of Providing Special and Contractual Termination Benefits
Equity Awards Adjustments, Excluding Value Reported in Compensation Table
Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member]
Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year
Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member]
Clover Capital
Clover Capital [Member]
Clover Capital
5.625% senior notes due August 2033
5.625% Senior Notes Due August 2033 [Member]
5.625% Senior Notes Due August 2033
Entity File Number
Entity File Number
Revenue Recognition
Revenue from Contract with Customer [Text Block]
Document Fiscal Year Focus
Document Fiscal Year Focus
Noncontrolling Interests
Noncontrolling Interest [Member]
Income Statement [Abstract]
Income Statement [Abstract]
Entity Address, Address Line One
Entity Address, Address Line One
Purchases of treasury stock
Treasury Stock, Value, Acquired, Cost Method
Lending Joint Ventures
Lending Joint Ventures [Member]
Lending Joint Ventures [Member]
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
Effect of exchange rate changes on cash and cash equivalents
Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Continuing Operations
Other accrued expenses
Other Accrued Liabilities, Current
Name
Forgone Recovery, Individual Name
Stock options exercisable
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value
Document Period End Date
Document Period End Date
Loss Contingency, Nature [Domain]
Loss Contingency, Nature [Domain]
Award Timing MNPI Considered
Award Timing MNPI Considered [Flag]
Cross-currency rate swap contracts
Cross Currency Interest Rate Contract [Member]
Balance at beginning of period (in shares)
Balance at end of period (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number
Insider Trading Arrangements [Line Items]
Banc of America Merchant Services
Banc of America Merchant Services [Member]
Banc of America Merchant Services [Member]
Contract assets
Contract with Customer, Asset, after Allowance for Credit Loss
Outstanding Aggregate Erroneous Compensation Amount
Outstanding Aggregate Erroneous Compensation Amount
First Data
First Data [Member]
First Data [Member]
Subscriber funds
Fair Value Disclosure, off-Balance-Sheet Risks, Amount, Liability
PEO Actually Paid Compensation Amount
PEO Actually Paid Compensation Amount
Revenue recognized which was included in the contract liability balance
Contract with Customer, Liability, Revenue Recognized
Adjustment to Compensation:
Adjustment to Compensation [Axis]
Small Business
Small Business [Member]
Small Business
Prepaid expenses and other current assets
Total prepaid expenses and other current assets
Prepaid Expense and Other Assets, Current
Less: net income attributable to noncontrolling interests and redeemable noncontrolling interest
Less: net income attributable to noncontrolling interests and redeemable noncontrolling interest
Net Income (Loss) Attributable to Noncontrolling Interest
Investments in Unconsolidated Affiliates
Investments in and Advances to Affiliates, Schedule of Investments [Text Block]
Foreign currency forward exchange contracts
Foreign Exchange Contract [Member]
Other restricted cash
Restricted Cash and Cash Equivalents, Noncurrent
Document Transition Report
Document Transition Report
Document Quarterly Report
Document Quarterly Report
Equity securities without readily determinable fair value, upward price adjustment, annual amount
Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount
4.200% senior notes due October 2028
4.2% Senior Notes Due October 2028 [Member]
4.2% Senior Notes Due 2028 [Member]
Cross-currency rate swap contract designated as fair value hedge
Derivative Instruments in Hedges, Net Investment in Foreign Operations, Assets, Fair Value
Schedule of redeemable noncontrolling interests activity
Redeemable Noncontrolling Interest [Table Text Block]
Litigation Case [Domain]
Litigation Case [Domain]
Fair Value, Recurring and Nonrecurring [Table]
Fair Value, Recurring and Nonrecurring [Table]
Accumulated other comprehensive loss
Accumulated other comprehensive loss
Accumulated Other Comprehensive Income (Loss), Net of Tax
Entity Current Reporting Status
Entity Current Reporting Status
Retained Earnings
Retained Earnings [Member]
Ownership percentage by noncontrolling owner
Subsidiary, Ownership Percentage, Noncontrolling Owner
Financial Reconciliation Business
Financial Reconciliation Business [Member]
Financial Reconciliation Business
Pension Adjustments Service Cost
Pension Adjustments Service Cost [Member]
Prepaid Expenses and Other Current Assets [Table]
Prepaid Expenses and Other Current Assets [Table]
Prepaid Expenses and Other Current Assets [Table]
Related Party [Axis]
Related and Nonrelated Parties [Axis]
Basic (in shares)
Weighted-average common shares outstanding used for the calculation of net income attributable to Fiserv, Inc. per share – basic (in shares)
Weighted Average Number of Shares Outstanding, Basic
Stock Price or TSR Estimation Method
Stock Price or TSR Estimation Method [Text Block]
1.125% Senior Notes due 2027
Senior Notes Due 2027 [Member]
Senior Notes Due 2027 [Member]
Document Information [Table]
Document Information [Table]
Subsidiary Merchant Matters
Subsidiary Merchant Matters [Member]
First Data Subsidiary Merchant Matters [Member]
Total equity
Balance at beginning of period
Balance at end of period
Equity, Including Portion Attributable to Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accrued professional fees
Accrued Professional Fees, Current
Executive Category:
Executive Category [Axis]
Purchases of investments
Payments to Acquire Investments
Name
Awards Close in Time to MNPI Disclosures, Individual Name
Forfeited (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period
Schedule of income tax provision and effective income tax rate
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Treasury Lock
Treasury Lock [Member]
Entity Filer Category
Entity Filer Category
Performance obligations expected to be satisfied
Revenue, Remaining Performance Obligation, Amount
Loss Contingencies [Line Items]
Loss Contingencies [Line Items]
Company Selected Measure Name
Company Selected Measure Name