Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Trading Arrangement: Trading Arrangement [Axis] Maximum Maximum [Member] Statistical Measurement [Domain] Statistical Measurement [Domain] Short-Term Debt, Type [Axis] Short-Term Debt, Type [Axis] Title of 12(b) Security Title of 12(b) Security Document Fiscal Year Focus Document Fiscal Year Focus Performance obligation period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Adjustment to Compensation, Amount Adjustment to Compensation Amount Segment Reporting [Abstract] Segment Reporting [Abstract] Schedule of Estimated Future Amortization Expense Intangible Asset, Finite-Lived, and Capitalized Cost, Software to be Sold, Leased, or Marketed, Estimated Amortization Expense [Table Text Block] Common stock, $1.25 par value: Authorized shares - 300.0; Issued shares - 189.3 at September 30, 2026 and December 31, 2025; Outstanding shares - 117.1 and 120.4 at September 30, 2026 and December 31, 2025, respectively Common Stock, Value, Issued Payment of taxes related to settlement of equity awards Payment, Tax Withholding, Share-Based Payment Arrangement Accrued salaries and bonuses Employee-related Liabilities, Current Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Restatement Determination Date Restatement Determination Date Notes, 5.00%, due August 2029 Notes, Five Point Zero Percent Due August 2029 [Member] Notes, Five Point Zero Percent Due August 2029 Allowance for doubtful accounts, beginning of period Allowance for doubtful accounts, end of period Accounts Receivable, Allowance for Credit Loss Cash received from divestitures Proceeds from Divestiture of Businesses Amendment Flag Amendment Flag Goodwill [Line Items] Goodwill [Line Items] Current liabilities: Liabilities, Current [Abstract] Change in revenue (as a percent) Increase (Decrease) In Revenue From Contract With Customer, Excluding Assessed Tax, Percent Increase (Decrease) In Revenue From Contract With Customer, Excluding Assessed Tax, Percent Current period bad debt expense Accounts Receivable, Credit Loss Expense (Reversal) Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Other comprehensive income: Other Comprehensive Income (Loss), Net of Tax [Abstract] Intangible Asset, Finite-Lived, Acquired [Line Items] Intangible Asset, Finite-Lived, Acquired [Line Items] Write-offs, net of recoveries Accounts Receivable, Allowance for Credit Loss, Writeoff (Recovery), Net Accounts Receivable, Allowance for Credit Loss, Writeoff (Recovery), Net Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Property and equipment: Property, Plant, and Equipment [Abstract] Entity Address, State or Province Entity Address, State or Province PEO Total Compensation Amount PEO Total Compensation Amount Insurance receivable Loss Contingency, Receivable Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Total capital expenditures Segment Reporting, Long-Lived Asset, Expenditure for Addition Weighted-average shares used in computing basic earnings per share (in shares) Weighted-average shares outstanding (basic) (in shares) Weighted Average Number of Shares Outstanding, Basic Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Number of reporting segments Number of Reportable Segments Total current liabilities Liabilities, Current Customer relationships Customer Relationships [Member] Short-Term Debt, Type [Domain] Short-Term Debt, Type [Domain] Entity Address, City or Town Entity Address, City or Town Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Purchased intangible assets, net Net Intangible Asset, Finite-Lived, after Accumulated Amortization Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Accumulated Amortization Intangible Asset, Finite-Lived, Accumulated Amortization Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Data processing equipment and furniture Data Processing Equipment And Furniture [Member] Data Processing Equipment And Furniture Credit facility borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Change in revenue Increase (Decrease) in Revenue From Contract With Customer, Excluding Assessed Tax, Amount Increase (Decrease) in Revenue From Contract With Customer, Excluding Assessed Tax, Amount Treasury stock, at cost, 71.6 shares and 68.3 shares at September 30, 2026 and December 31, 2025, respectively Treasury Stock, Value Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Litigation Case [Axis] Litigation Case [Axis] Schedule of Operating Revenue, Operating Income by Operating Segment and Total Assets by Operating Segments Segment Reporting [Table Text Block] Noncontrolling Interests including Redeemable Noncontrolling Interests Noncontrolling Interests Noncontrolling Interests Noncontrolling Interest [Member] Document Period End Date Document Period End Date Changes in assets and liabilities, excluding effects of acquisitions: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Current and long term liabilities, excluding debt Increase Decrease In Current Liabilities Excluding Debt The net change in the reporting period in current liabilities (excluding debt). Aggregate principal amount issued Debt Instrument, Face Amount Debentures, 6.90%, due July 2028 Debentures Six Point Nine Zero Percent Due July Twenty Twenty Eight [Member] Debentures 6.90 Percent Due July 2028 ACCUMULATED OTHER COMPREHENSIVE LOSS Equity [Text Block] Basic earnings per common share: Earnings Per Share, Basic [Abstract] Operating expenses: Costs and Expenses [Abstract] Security Exchange Name Security Exchange Name Debt instrument, term Debt Instrument, Term Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Consolidation Items [Domain] Consolidation Items [Domain] Schedule of Rollforward of Allowance for Doubtful Accounts Accounts Receivable, Allowance for Credit Loss [Table Text Block] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Name Outstanding Recovery, Individual Name Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Schedule of Reconciliation of Weighted-Average Outstanding Shares used in Calculations of Basic and Diluted EPS Schedule of Weighted Average Number of Shares [Table Text Block] Document Fiscal Period Focus Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Total liabilities Liabilities Trading Symbol Trading Symbol Redeemable Noncontrolling Interest Consolidation, Variable Interest Entity, Policy [Policy Text Block] Geographical [Domain] Geographical [Domain] 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] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Dividends paid to employee benefits trusts Dividends Paid To Employee Benefits Trust Cash dividend received on common stock held by the employee benefits trust. Company Selected Measure Name Company Selected Measure Name Litigation settlement gain (loss) Gain (Loss) from Litigation Settlement Distributions paid to noncontrolling interests Payments of Ordinary Dividends, Noncontrolling Interest Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Effect of dilutive securities: Weighted Average Number of Shares Outstanding, Diluted, Adjustment [Abstract] Diluted earnings per common share: Earnings Per Share, Diluted [Abstract] Unrecognized prior service cost related to our pension and other postretirement benefit plans, net of accumulated tax of $1.0 million and $1.1 million at September 30, 2026 and December 31, 2025, respectively. Pension and other postretirement benefit plans Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Total debt Outstanding notes Long-Term Debt, Gross Nature of Operations Nature Of Operations Policy [Policy Text Block] Nature of Operations. Credit Facility [Domain] Credit Facility [Domain] Depreciation and amortization Depreciation and amortization expenses Depreciation, Depletion and Amortization, Nonproduction Operating activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Weighted-average shares used in computing diluted earnings per share (in shares) Weighted-average shares outstanding (diluted) (in shares) Weighted Average Number of Shares Outstanding, Diluted Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Dividends per common share (in dollars per share) Common Stock, Dividends, Per Share, Cash Paid Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Long-term pension and other postretirement benefit liabilities Liability, Defined Benefit Plan, Noncurrent Underlying Security Market Price Change Underlying Security Market Price Change, Percent Deferred income taxes Deferred Income Taxes and Tax Credits Commercial paper ("CP") Commercial Paper [Member] Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Award Timing Predetermined Award Timing Predetermined [Flag] Treasury Stock Treasury Stock, Common [Member] Intangible Asset, Goodwill and Other [Abstract] Intangible Asset, Goodwill and Other [Abstract] Letters of credit outstanding, amount Letters of Credit Outstanding, Amount Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Stock-based compensation expense APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Effective income tax rate (as a percent) Effective Income Tax Rate Reconciliation, Percent Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Stock options and restricted stock units (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements All Executive Categories All Executive Categories [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Shares issued under stock and benefit plans, net of minimum tax withholdings Shares Issued Under Stock and Benefit Plans Net Of Minimum Tax Withholdings Values Values of net shares issued during the period as a result of any share-based compensation plan. Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Fair value of long-term debt Long-Term Debt, Fair Value Redeemable noncontrolling interests Redeemable noncontrolling interests, beginning of period Redeemable noncontrolling interests, end of period Redeemable Noncontrolling Interest, Equity, Carrying Amount Antidilutive Securities [Axis] Antidilutive Securities [Axis] Stock Held By Employee Benefits Trusts Trust for Benefit of Employees [Member] Data processing, outsourcing services and other agreements, expiration year Service Agreements Expiration Period Service Agreements, Expiration Period AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Notes, 7.00%, due July 2037 Notes Seven Point Zero Percent Due July Twenty Thirty Seven [Member] Notes 7.0 Percent Due July 2037 SEGMENT INFORMATION Segment Reporting [Text Block] Outstanding borrowings Long-Term Line of Credit Minimum Minimum [Member] Dividends paid to Equifax shareholders Payments of Ordinary Dividends, Common Stock Expiration Date Trading Arrangement Expiration Date Schedule of Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Notes, 4.80%, due September 2029 Notes, Four Point Eight Zero Percent Due September 2029 [Member] Notes, Four Point Eight Zero Percent Due September 2029 Effect of foreign currency exchange rates on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Total shareholders' equity Beginning Balance Ending Balance Equity, Including Portion Attributable to Noncontrolling Interest 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] Estimate of liability related settlement Loss Contingency, Estimate of Possible Loss Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Common stock, authorized (in shares) Common Stock, Shares Authorized Antidilutive Security, Excluded EPS Calculation [Table] Antidilutive Security, Excluded EPS Calculation [Table] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Exercise Price Award Exercise Price Employer Services Employer Services [Member] Employer Services [Member] Investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Segment Reporting [Line Items] Segment Reporting [Line Items] Common stock authorized, amount for future purchases Share Repurchase Program, Authorized, Amount Document Quarterly Report Document Quarterly Report Stock held by employee benefits trusts, at cost, 0.6 shares at September 30, 2026 and December 31, 2025 Common Stock, Held-in-Trust 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] Segments [Domain] Segment [Domain] Segments [Domain] Europe Europe [Member] DEBT Debt Disclosure [Text Block] Payments on long-term debt Payments on long-term debt Repayments of Long-Term Debt Less unamortized discounts and debt issuance costs Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Equity Component [Domain] Equity Component [Domain] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] Total operating expenses General corporate expense Costs and Expenses Adoption Date Trading Arrangement Adoption Date Debt instrument, interest rate (as a percent) Debt Instrument, Interest Rate, Stated Percentage Cash dividends Dividends, Common Stock, Cash Total Equifax shareholders’ equity Equity, Attributable to Parent Notes, 5.10%, due June 2028 Notes, Five Point One Percent Due June 2028 [Member] Notes, Five Point One Percent Due June 2028 Commercial paper, maturity period range Commercial Paper Maturity Period Range Commercial Paper Maturity Period Range ASSETS Assets [Abstract] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Insider Trading Policies and Procedures [Line Items] Adjustments to initial purchase price allocation Goodwill, Measurement Period Adjustment Allowance for doubtful accounts Accounts Receivable, Allowance for Credit Loss, Current Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Other Current Assets Other Current Assets, Policy [Policy Text Block] Other Current Assets, Policy [Policy Text Block] Selling, general and administrative expenses Selling, general and administrative expenses Selling, General and Administrative Expense COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Number of operating segments Number of Operating Segments Antidilutive stock options (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Schedule of Changes in Amount of Goodwill Goodwill [Table Text Block] Entity Central Index Key Entity Central Index Key Purchased data files Database Rights [Member] Less accumulated depreciation and amortization Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization Paid-in capital Additional Paid in Capital, Common Stock All Adjustments to Compensation All Adjustments to Compensation [Member] General corporate expense Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Restricted cash and cash equivalents, offset Restricted Cash And Cash Equivalents, Offset Restricted Cash And Cash Equivalents, Offset Equity [Abstract] Equity [Abstract] 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] Cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Data Processing Outsourcing Services And Other Agreements Data Processing Outsourcing Services And Other Agreements [Member] Data Processing, Outsourcing Services And Other Agreements [Member] Other comprehensive income Increase in accumulated other comprehensive loss Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Income Statement Income Statement [Abstract] Document Transition Report Document Transition Report Other Current Liabilities Other Current Liabilities, Policy [Policy Text Block] Other Current Liabilities, Policy [Policy Text Block] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Schedule of Purchased Intangible Assets Intangible Asset, Finite-Lived [Table Text Block] Intangible Asset, Finite-Lived, Acquired [Table] Intangible Asset, Finite-Lived, Acquired [Table] City Area Code City Area Code Accumulated Other Comprehensive Loss Total AOCI Attributable to Parent [Member] Thereafter Finite-Lived Intangible Asset, Expected Amortization, After Year Four Finite-Lived Intangible Asset, Expected Amortization, After Year Four All Individuals All Individuals [Member] Name Forgone Recovery, Individual Name Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Statement [Line Items] Statement [Line Items] Total assets Total assets Assets Gain on sale of equity investment Equity Securities, FV-NI, Realized Gain (Loss) Trade Accounts Receivable and Allowance for Doubtful Accounts Accounts Receivable [Policy Text Block] Preferred stock, issued (in shares) Preferred Stock, Shares Issued Payment of share repurchase excise tax Payment Of Share Repurchase Excise Tax Payment Of Share Repurchase Excise Tax Operating Segments Operating Segments [Member] Interest expense Interest expense Interest Expense, Nonoperating Jamil Farshchi [Member] Jamil Farshchi Long-Term Purchase Commitment, Category of Item Purchased [Domain] Long-Term Purchase Commitment, Category of Item Purchased [Domain] Other assets, current and long-term Increase (Decrease) in Other Operating Assets PEO PEO [Member] Beginning Balance (in shares) Ending Balance (in shares) Shares, Outstanding Other long-term liabilities Other Liabilities, Noncurrent Goodwill Balance, Beginning of period Balance, End of period Goodwill Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Retained Earnings Retained Earnings [Member] Revolving Credit Facility Revolving Credit Facility [Member] Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] Capitalized internal-use software and system costs Software, In-Development, Internally Developed, and Purchased [Member] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Common stock, outstanding (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Foreign currency translation Foreign currency translation adjustment Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Debt issuance costs Payments of Debt Issuance Costs Net income attributable to Equifax (in dollars per share) Earnings Per Share, Diluted Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Entity Current Reporting Status Entity Current Reporting Status Cash used in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Restructuring Charges [Abstract] Total Shareholder Return Amount Total Shareholder Return Amount Other Debt Other [Member] Debt, Other Litigation Case [Domain] Litigation Case [Domain] Amortization expense related to purchased intangible assets Intangible Asset, Finite-Lived, Amortization Expense Adjustments to reconcile consolidated net income to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Total property and equipment, net Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Operating revenue Operating Revenue Revenue from Contract with Customer, Excluding Assessed Tax Notes, 5.65%, due August 2033 Notes, Five Point Six Five Percent Due August 2033 [Member] Notes, Five Point Six Five Percent Due August 2033 Line of credit facility, available for borrowing Line of Credit Facility, Remaining Borrowing Capacity Intangible Asset, Finite-Lived, Class [Axis] Intangible Asset, Finite-Lived, Class [Axis] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] GOODWILL AND INTANGIBLE ASSETS Intangible Asset and Goodwill [Text Block] Underlying Securities Award Underlying Securities Amount REVENUE Revenue from Contract with Customer [Text Block] Prepaid expenses Prepaid Expense, Current Segment Reporting Disclosure [Table] Segment Reporting [Table] Other current assets Other Assets, Current Tax receivable and customer funds held Tax Receivable And Customer Funds Held, Current Tax Receivable And Customer Funds Held, Current Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Operating income Operating Income (Loss) Total remaining performance obligation Revenue, Remaining Performance Obligation, Amount Asia Pacific Asia Pacific [Member] Current Fiscal Year End Date Current Fiscal Year End Date Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount ACQUISITIONS AND INVESTMENTS Business Combination [Text Block] Shares issued under stock and benefit plans, net of minimum tax withholdings (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, before Forfeiture 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] Cash dividends, per share (in dollars per share) Common Stock, Dividends, Per Share, Declared Entity File Number Entity File Number Verification Services Verification Services [Member] Verification Services [Member] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Net short-term payments Proceeds from (Repayments of) Short-Term Debt Land, buildings and improvements Land, Buildings and Improvements [Member] Dividends paid to noncontrolling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Common stock, issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Treasury stock (in shares) Treasury Stock, Common, Shares Accumulated other comprehensive income, tax AOCI Tax, Attributable to Parent Cost of services (exclusive of depreciation and amortization below) Cost of services Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization Equity Components [Axis] Equity Components [Axis] Accounts receivable, net Increase (Decrease) in Accounts Receivable Financial Marketing Services Financial Marketing Services [Member] Financial Marketing Services [Member] Product and Service [Domain] Product and Service [Domain] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Entity Interactive Data Current Entity Interactive Data Current Less: Net income attributable to noncontrolling interests including redeemable noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Deferred income tax liabilities, net Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Small Business Entity Small Business Termination Date Trading Arrangement Termination Date Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Change in unrecognized prior service cost related to our pension and other postretirement benefit plans, net Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Other current liabilities Other Liabilities, Current Other assets, net Other Assets, Noncurrent Document Type Document Type Accrued expenses Accrued Liabilities, Current Fair Value as of Grant Date Award Grant Date Fair Value U.S. Information Solutions United States Consumer Information Solutions [Member] US Consumer Information Solutions [Member] Loss contingency receivable Loss Contingency, Receivable, Current Goodwill [Table] Goodwill [Table] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Arrangement Duration Trading Arrangement Duration Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Proceeds from issuance of long-term debt Proceeds from Issuance of Long-Term Debt Local Phone Number Local Phone Number Canada CANADA Commitments and Contingencies Disclosure [Line Items] Commitments and Contingencies Disclosure [Line Items] Commitments and Contingencies Disclosure [Line Items] Consolidation Items [Axis] Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Consolidated income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Commitments and Contingencies (see Note 6) Commitments and Contingencies Gross Intangible Asset, Finite-Lived, before Accumulated Amortization Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Total property and equipment Property, Plant, and Equipment, before Accumulated Depreciation, Depletion, and Amortization Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] 2030 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Four Equity, Attributable to Noncontrolling Interest [Roll Forward] Equity, Attributable to Noncontrolling Interest [Roll Forward] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] Acquired software and technology Technology and Software [Member] Technology and Software [Member] Notes, 3.25%, due June 2026 Notes Three Point Two Five Due June Two Thousand Twenty Six [Member] Notes Three Point Two Five Due June Two Thousand Twenty Six Goodwill [Roll Forward] Goodwill [Roll Forward] Other Assets Other Assets [Policy Text Block] Other Assets, Policy LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Intangible Asset, Finite-Lived, Class [Domain] Intangible Asset, Finite-Lived, Class [Domain] All Award Types Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount 2027 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year One Trade names, non-compete agreements and other intangible assets Tradenames and Other [Member] Tradenames and other Treasury stock purchased under share repurchase program, including brokerage commissions and excise taxes (in shares) Treasury Stock, Shares, Acquired Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] PEO Name PEO Name Geographical [Axis] Geographical [Axis] Cash flow hedging transactions, net of tax of $0.4 million and $0.5 million at September 30, 2026 and December 31, 2025, respectively. Cash flow hedging transactions Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Commitments and Contingencies Disclosure [Table] Commitments and Contingencies Disclosure [Table] Commitments and Contingencies Disclosure [Table] Long-Lived Asset, Class [Axis] Long-Lived Asset, Class [Axis] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Accounts Receivable, Allowance for Credit Loss [Roll Forward] Accounts Receivable, Allowance for Credit Loss [Roll Forward] Treasury stock purchased under share repurchase program, including brokerage commissions and excise taxes Treasury Stock, Value, Acquired, Cost Method Payments for restructuring Payments for Restructuring Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Commercial paper, actual maturity period range Commercial Paper Maturity Actual Period Range Commercial Paper Maturity Actual Period Range Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] 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] Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Debt Instrument [Axis] Debt Instrument [Axis] Stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense 2028 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Two Schedule of Debt Outstanding Schedule of Debt [Table Text Block] Net income attributable to Equifax (in dollars per share) Earnings Per Share, Basic Treasury stock purchases Payments for Repurchase of Common Stock Deferred revenue Contract with Customer, Liability, Current Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Long-term debt Total long-term debt, net Long-Term Debt, Excluding Current Maturities Award Type Award Type [Axis] Online Information Solutions Online Information Solutions [Member] Online Information Solutions [Member] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Trade accounts receivable, net of allowance for doubtful accounts of $17.9 and $20.2 at September 30, 2026 and December 31, 2025, respectively Accounts Receivable, after Allowance for Credit Loss, Current Retained earnings Retained Earnings (Accumulated Deficit) Product and Service [Axis] Product and Service [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] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Common Stock [Member] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover page. 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