Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Trading Arrangement: Trading Arrangement [Axis] Notes, 5.10%, due June 2028 Notes, Five Point One Percent Due June 2028 [Member] Notes, Five Point One Percent Due June 2028 FCPA Litigation FCPA Litigation [Member] FCPA Litigation Maximum Maximum [Member] Statistical Measurement [Domain] Statistical Measurement [Domain] Title of 12(b) Security Title of 12(b) Security Notes, 7.00%, due July 2037 Notes Seven Point Zero Percent Due July Twenty Thirty Seven [Member] Notes 7.0 Percent Due July 2037 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, 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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 June 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, 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(Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Other Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest 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] 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 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 Other comprehensive income Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Income Statement Income Statement [Abstract] Document Transition Report Document Transition Report 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] Employer Services Employer Services [Member] Employer Services [Member] City Area Code City Area Code Accumulated Other Comprehensive Loss Total AOCI Attributable to Parent [Member] 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 Operating Segments Operating Segments [Member] Interest expense Interest expense Interest Expense, Nonoperating Commercial paper, maturity period range Commercial Paper Maturity Period Range Commercial Paper Maturity Period Range 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 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 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 Commitments and Contingencies Disclosure [Line Items] Commitments and Contingencies Disclosure [Line Items] Commitments and Contingencies Disclosure [Line Items] 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] Online Information Solutions Online Information Solutions [Member] Online Information Solutions [Member] 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 Litigation Case [Domain] Litigation Case [Domain] Amortization expense related to purchased intangible assets Intangible Asset, Finite-Lived, Amortization Expense 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). 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 Line of credit facility, available for borrowing Line of Credit Facility, Remaining Borrowing Capacity Line of credit Line of Credit, Current 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 Workforce Solutions Workforce Solutions Workforce Solutions [Member] Workforce Solutions Segment Reporting Disclosure [Table] Segment Reporting [Table] 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 Other current assets Other Assets, 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 Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Net short-term borrowings (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 Data Processing Outsourcing Services And Other Agreements Data Processing Outsourcing Services And Other Agreements [Member] Data Processing, Outsourcing Services And Other Agreements [Member] Equity Components [Axis] Equity Components [Axis] Accounts receivable, net Increase (Decrease) in Accounts Receivable Product and Service [Domain] Product and Service [Domain] Disaggregation of Revenue [Table] Disaggregation of 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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 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] Local Phone Number Local Phone Number Canada CANADA 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] 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 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] Goodwill [Roll Forward] Goodwill [Roll Forward] 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 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 June 30, 2026 and December 31, 2025, respectively. Cash flow hedging transactions Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Long-Lived Asset, Class [Axis] Long-Lived Asset, Class [Axis] Verification Services Verification Services [Member] Verification Services [Member] Acquired software and technology Technology and Software [Member] Technology and Software [Member] 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 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] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Trade accounts receivable, net of allowance for doubtful accounts of $20.5 and $20.2 at June 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. Cover [Abstract] Effect of foreign currency translation attributable to redeemable noncontrolling interest Temporary Equity, Foreign Currency Translation Adjustments Foreign currency translation Goodwill, Foreign Currency Translation, Gain (Loss) Equity Awards Adjustments Equity Awards Adjustments [Member] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Total liabilities, redeemable noncontrolling interests, and shareholders' equity Liabilities and Equity Stock options Share-Based Payment Arrangement, Option [Member] Short-term debt and current maturities of long-term debt Less short-term debt and current maturities Debt, Current Noncontrolling interests Equity, Attributable to Noncontrolling Interest Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Restructuring charges Restructuring Charges Tabular List, Table Tabular List [Table Text Block] Other income, net Other income, net Other Nonoperating Income (Expense) Equifax Shareholders Parent [Member] 2029 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Three Tax receivable and customer funds held Tax Receivable And Customer Funds Held, Current Tax Receivable And Customer Funds Held, Current 2026 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Remainder of Fiscal Year Name Awards Close in Time to MNPI Disclosures, Individual Name Equifax shareholders' equity: Equity, Including Portion Attributable to Noncontrolling Interest [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] Schedule of Noncontrolling Interests Activities Redeemable Noncontrolling Interest [Table Text Block] Long-Lived Asset, Class [Domain] Long-Lived Asset, Class [Domain] Other Debt Other [Member] Debt, Other Restricted cash and cash equivalents, offset Restricted Cash And Cash Equivalents, Offset Restricted Cash And Cash Equivalents, Offset Preferred stock, authorized (in shares) Preferred Stock, Shares Authorized Proprietary database Proprietary Database [Member] Proprietary Database [Member] Financial Marketing Services Financial Marketing Services [Member] Financial Marketing Services [Member] Preferred stock, $0.01 par value: Authorized shares - 10.0; Issued shares - none Preferred Stock, Value, Issued Adjustment to Compensation: Adjustment to Compensation [Axis] Pending claims, number Loss Contingency, Pending Claims, Number Net loss attributable to redeemable noncontrolling interest Net Income (Loss) Attributable to Redeemable Noncontrolling Interest Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Capital expenditures Payments to Acquire Productive Assets Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Credit Facility [Axis] Credit Facility [Axis] RESTRUCTURING CHARGES Restructuring and Related Activities Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available 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 Name Measure Name INCOME TAXES Income Tax Disclosure [Text Block] Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Debt Instrument [Line Items] Debt Instrument [Line Items] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Paid-In Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category U.S. Information Solutions United States Consumer Information Solutions [Member] US Consumer Information Solutions [Member] Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and Cash Equivalent Company Selected Measure Amount Company Selected Measure Amount 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. Depreciation and amortization Depreciation, Depletion and Amortization Notes, 2.35%, due September 2031 Notes, Two Point Three Five Percent Due September 2031 [Member] Notes, Two Point Three Five Percent Due September 2031 Entity Address, Address Line Two Entity Address, Address Line Two Consolidated net income Net income Consolidated net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Current assets: Assets, Current [Abstract] Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Provision for income taxes Income Tax Expense (Benefit) Latin America Latin America [Member] Net income Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest Award Timing Method Award Timing Method [Text Block] (Decrease) increase in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Loss contingency accrual Loss Contingency, Accrual, Current AOCI Attributable to Parent, Net of Tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Net income attributable to Equifax Net Income (Loss) Attributable to Parent Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Statement [Table] Statement [Table] Other income, net and Interest expense Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member] Restatement Determination Date: Restatement Determination Date [Axis] Proceeds from exercise of stock options and employee stock purchase plan Proceeds from Stock Options Exercised Schedule of Accumulated Other Comprehensive Income Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Stock held by employee benefits trusts (in shares) Common Stock, Shares Held in Employee Trust, Shares Schedule of Remaining Performance Obligation Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] Indefinite-lived intangible assets Indefinite-Lived Contractual Rights Category of Item Purchased [Axis] Category of Item Purchased [Axis] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation and Significant Accounting Policies [Text Block] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]