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Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] Pension and Postretirement Benefit Plans Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Employee withholding tax on share-based payments, contingent consideration payments and other Payment, Tax Withholding, Share-Based Payment Arrangement and Payment for Excise Tax Payments on Share Repurchases Payment, Tax Withholding, Share-Based Payment Arrangement and Payment for Excise Tax Payments on Share Repurchases Ratio of indebtedness to cash flow Ratio of Indebtedness To Cash Flow Ratio of Indebtedness To Cash Flow LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Cover page. Cover [Abstract] Net income: Earnings Per Share, Basic and Diluted EPS [Abstract] Earnings Per Share, Basic and Diluted EPS Maximum Maximum [Member] Remaining shares available under repurchase program (shares) Share Repurchase Program, Remaining Authorized, Number of Shares Schedule of Maturities of Operating Lease Liabilities Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Debt Instrument [Line Items] Debt Instrument [Line Items] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Other components of net periodic benefit cost Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component Less: Treasury Stock Treasury Stock, Common [Member] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Pay vs Performance Disclosure [Line Items] Accounts payable Disposal Group, Including Discontinued Operation, Accounts Payable, Current Present value of lease liabilities Operating Lease, Liability Retirement Benefits [Abstract] Retirement Benefits [Abstract] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Total Number of Shares Purchased Completed Award [Member] Completed Award [Member] Liabilities Liabilities [Abstract] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Income before taxes on income Income before taxes on income Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Schedule of Location and Amounts of Leases Schedule Of Location And Amounts Of Leases [Table Text Block] Schedule of Location and Amounts of Leases [Table Text Block] Other non-current liabilities Other Liabilities, Noncurrent Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Operating Segments Operating Segments [Member] Remaining lease terms Lessee, Operating Lease, Remaining Lease Term Unrealized gain on cash flow hedges Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount 2029 Lessee, Operating Lease, Liability, to be Paid, Year Three Contribution towards retirement plans Defined Benefit Plan, Plan Assets, Contributions by Employer Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Indices Indices Segment [Member] Indices Segment [Member] Comprehensive income attributable to S&P Global Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Disposal Group Name [Domain] Disposal Group Name [Domain] Name Measure Name Restructuring reserve balance Ending Reserve Balance Restructuring Reserve Current lease liabilities Operating Lease, Liability, Current Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] Equity, Attributable to Noncontrolling Interest [Roll Forward] Property and equipment, net Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Current Deferred tax liability — non-current Deferred Income Tax Liabilities, Net Document Fiscal Period Focus Document Fiscal Period Focus 2022 Repurchase Program Two Thousand Twenty Two Repurchase Program [Member] Two Thousand Twenty Two Repurchase Program Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Award Timing Method Award Timing Method [Text Block] 4.25% Senior Notes, due 2031 Senior Notes 4.25% Due 2031 [Member] Senior Notes 4.25% Due 2031 Award Type [Axis] Award Type [Axis] Foreign Currency Translation Adjustments Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Hedging Relationship [Domain] Hedging Relationship [Domain] Total debt Long-term debt Long-Term Debt Legal Entity [Axis] Legal Entity [Axis] Total assets Total assets Assets Trading Symbol Trading Symbol 2030 Lessee, Operating Lease, Liability, to be Paid, Year Four Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Geographical [Domain] Geographical [Domain] Entity Address, City or Town Entity Address, City or Town Operating Activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Less: other segment items Segment Reporting, Other Segment Item, Amount Effect of exchange rate changes on cash Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Income Statement Location [Domain] Statement of Income Location, Balance [Domain] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Energy Energy Segment [Member] Energy Segment Entity Emerging Growth Company Entity Emerging Growth Company Dividends declared per common share (USD per share) Common Stock, Dividends, Per Share, Declared Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Capitalized contract costs Capitalized Contract Cost, Net Operating leases Right-of-Use Asset Obtained in Exchange for Operating Lease Liability 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] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Related Party Related Party [Member] Actual shares outstanding at period end (shares) Common Stock, Shares, Outstanding Provision for losses on accounts receivable Accounts Receivable, Credit Loss Expense (Reversal) Unearned revenue Disposal Group, Including Discontinued Operation, Deferred Revenue, Current Reductions to restructuring reserve Restructuring Reserve, Period Increase (Decrease) PEO PEO [Member] 4.00% Senior Notes due 2026 4.00% Senior Notes Due March 1, 2026 [Member] 4.00% Senior Notes Due March 1, 2026 Income taxes currently payable Accrued Income Taxes, Current U.S. UNITED STATES Changes in operating assets and liabilities, net of effect of acquisitions and dispositions: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on 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Acquisitions and Divestitures Mergers, Acquisitions and Dispositions Disclosures [Text Block] Acquisitions, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Class of Treasury Stock [Table] Class of Treasury Stock [Table] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] 24 months Two Years [Member] Two Years Asset-linked fees Asset-Linked Fees [Member] Asset-Linked Fees [Member] Investing Activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] 2.45% Senior Notes due 2027 Senior Notes 2.45% Due 2027 [Member] Senior Notes 2.45% Due 2027 Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation 2.95% Senior Notes due 2027 Senior Notes 2.95% due 2027 [Member] Senior Notes 2.95% due 2027 Fair Value Hedging Fair Value Hedging [Member] Disposal Group, Disposed of by Sale, Not Discontinued Operations Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] Credit facility term Debt Instrument, Term Revenues from External Customers and Long-Lived Assets [Line Items] Revenues from External Customers and Long-Lived Assets [Line Items] Amortization of prior service credit / actuarial loss Defined Benefit Plan, Amortization of Gain (Loss) Total lease cost Lease, Cost Revenue, Selling and general expenses Selling, General and Administrative Expenses [Member] Agreement terms, change of control, put option for minority interest ownership, effective period Business Acquisition, Agreement Terms, Change of Control, Put Option for Minority Interest Ownership, Effective Period Business Acquisition, Agreement Terms, Change of Control, Put Option for Minority Interest Ownership, Effective Period Net interest income Interest Income (Expense), Operating Cash Flow Hedges Cash Flow Hedging [Member] Goodwill Goodwill Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Schedule of Components of Lease Expense and Supplemental Cash Flow Information Lease, Cost [Table Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Net loss from investments Gain (Loss) on Investments Depreciation Depreciation Depreciation Prepaid and other current assets Prepaid Expenses and Other Current Assets [Member] 4.75% Senior Notes due 2028 4.75% Senior Notes Due August 1, 2028 [Member] 4.75% Senior Notes Due August 1, 2028 Non-subscription / Transaction Non-Subscription / Transaction [Member] Non-Subscription / Transaction [Member] Line of credit facility, potential reduction in drawn margin Line Of Credit Facility, Potential Reduction In Drawn Margin Line Of Credit Facility, Potential Reduction In Drawn Margin Equity Components [Axis] Equity Components [Axis] Sublease income Sublease Income Redemption value adjustment Noncontrolling Interest, Change in Redemption Value Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Number of reportable segments Number of Reportable Segments Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Other Performance Measure, Amount Other Performance Measure, Amount Short-term debt Less: short-term debt including current maturities Debt, Current Entity Address, State or Province Entity Address, State or Province Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Security, Excluded EPS Calculation [Table] Dividends (Dividend declared per common share) Dividends, Common Stock Related Party [Domain] Related and Nonrelated Parties [Domain] Total current liabilities Liabilities, Current Other current liabilities Other Current Liabilities [Member] 3.25% Senior Notes due 2049 Senior Notes 3.25% Due 2049 [Member] Senior Notes 3.25% Due 2049 Derivative Instrument [Axis] Derivative Instrument [Axis] Individual: Individual [Axis] Earnings per share attributable to S&P Global Inc. common shareholders: Earnings Per Share Reconciliation [Abstract] Accounting Changes and Error Corrections [Abstract] Accounting Changes and Error Corrections [Abstract] Dividends paid to shareholders Payments of Ordinary Dividends, Common Stock Additional paid-in capital Additional Paid in Capital, Common Stock Entity [Domain] Entity [Domain] Less: comprehensive income attributable to redeemable noncontrolling interests Comprehensive income attributable to redeemable noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Redeemable Noncontrolling Interest Comprehensive Income (Loss), Net of Tax, Attributable to Redeemable Noncontrolling Interest Cash provided by (used for) investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity investments in unconsolidated subsidiaries Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Period of recognition for remaining performance obligation Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 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] Gain on dispositions Gain on dispositions Gain on dispositions Gain (Loss) on Disposition of Business Document Fiscal Year Focus Document Fiscal Year Focus Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Right of use assets Lease right of use assets Operating Lease, Right-of-Use Asset Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Repayments of long term debt Repayments of Long-Term Debt Noncontrolling interest ownership by noncontrolling owners (as a percent) Subsidiary, Ownership Percentage, Noncontrolling Owner Uncapped ASR, October 28, 2024 Uncapped Accelerated Share Repurchases Initiated October 28, 2024 [Member] Uncapped Accelerated Share Repurchases Initiated October 28, 2024 Effective income tax rate (as a percent) Effective Income Tax Rate Reconciliation, Percent Entity Interactive Data Current Entity Interactive Data Current Gain on disposition after tax Gain (Loss) on Disposition of Business, After Tax Gain (Loss) on Disposition of Business, After Tax Operating lease cost Operating Lease, Cost Sales usage-based royalties Sales Usage-Based Royalties [Member] Sales Usage-Based Royalties [Member] Weighted average recognition period Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Equity [Abstract] Equity [Abstract] Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax Contract Assets, Unearned Revenue, Remaining Performance Obligations and Costs to Obtain Contracts Revenue from Contract with Customer [Policy Text Block] Segment and Related Information Segment Reporting Disclosure [Text Block] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] Enterprise Data Management and ThinkFolio Enterprise Data Management and ThinkFolio [Member] Enterprise Data Management and ThinkFolio Goodwill Disposal Group, Including Discontinued Operation, Goodwill, Current Increase (Decrease) in Stockholders' Equity [Roll Forward] 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Revolving Credit Facility Revolving Credit Facility [Member] Arrangement Duration Trading Arrangement Duration Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Unearned revenue Contract with Customer, Liability, Current Segments [Axis] Segments [Axis] Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Local Phone Number Local Phone Number Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Unrecognized compensation expense Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount European region Europe [Member] Stock-Based Compensation Share-Based Payment Arrangement [Text Block] ASSETS Assets Assets [Abstract] Long-term debt Long-term debt Long-Term Debt, Excluding Current Maturities Credit Facility [Axis] Credit Facility [Axis] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Balance Sheet Location [Axis] Statement of Financial Position Location, Balance [Axis] Debt Instrument [Axis] Debt Instrument [Axis] Employee Benefits Retirement Benefits [Text Block] Business Combination [Line Items] Business Combination [Line Items] Credit Facility [Domain] Credit Facility [Domain] Equity: Equity, Attributable to Parent [Abstract] 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] Rest of the world Rest Of World [Member] Rest of world. Additions to short-term debt, net Proceeds from Short-Term Debt Uncapped ASR, February 12, 2026 Uncapped Accelerated Share Repurchases Initiated February 12 2026 [Member] Uncapped Accelerated Share Repurchases Initiated February 12 2026 Entity Address, Address Line One Entity Address, Address Line One Share repurchases, including excise tax Treasury Stock, Value, Acquired, Cost Method 6.55% Senior Notes due 2037 Senior Notes 6.55% Due 2037 [Member] Senior Notes 6.55% Due 2037 Schedule of Accelerated Share Repurchase Agreements Accelerated Share Repurchases [Table Text Block] Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Interest rate (as a percent) Debt Instrument, Interest Rate, Stated Percentage Allowance for doubtful accounts Accounts Receivable, Allowance for Credit Loss, Current Change in redemption value of redeemable noncontrolling interests Noncontrolling Interest, Change In Redemption Value Of Redeemable 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Other Noncash Income (Expense) Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Compensation Amount Outstanding Recovery Compensation Amount Less: comprehensive income attributable to nonredeemable noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Nonredeemable Noncontrolling Interest Comprehensive Income (Loss), Net of Tax, Attributable to Nonredeemable Noncontrolling Interest Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Income tax effect Actuarial losses, tax expense (less than) Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Share Repurchase Program [Axis] Share Repurchase Program [Axis] OSTTRA OSTTRA [Member] OSTTRA MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Name Awards Close in Time to MNPI Disclosures, Individual Name AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] 2025 Restructuring Plan Restructuring Plan, 2025 [Member] Restructuring Plan, 2025 Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Employee stock plans APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Revenue, Remaining Performance Obligation, Period [Axis] Revenue, Remaining Performance Obligation, Period [Axis] Revenue, Remaining Performance Obligation, Period Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax 2.7% Sustainability-Linked Senior Notes, due 2029 Sustainability-Linked Senior Notes 2.70% Due 2029 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Amortization, Property, Plant, and Equipment Company Selected Measure Name Company Selected Measure Name Net change in other assets and liabilities Increase (Decrease) in Other Noncurrent Assets and Liabilities, Net Senior Notes Senior Notes [Member] Debt Debt Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Accounts payable Accounts Payable, Current Operating cash flows for operating leases Operating Lease, Payments Capitalized contract cost amortization period (in years) Capitalized Contract Cost, Amortization Period Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] All Executive Categories All Executive Categories [Member] Payments on senior notes Repayments of Senior Debt Common stock, $1 par value: authorized - 600 million shares; issued - 2026 and 2025 415 million shares Common Stock, Value, Issued Restructuring Plan [Domain] Restructuring Plan [Domain] 2.5% Senior Notes due 2029 Senior Notes 2.5% Due 2029 [Member] Senior Notes 2.5% Due 2029 Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Diluted (shares) Diluted weighted-average number of common shares outstanding (shares) Weighted Average Number of Shares Outstanding, Diluted Commitments and contingencies (Note 12) Commitments and Contingencies Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Number of performance indicators linked to the commitment fees Line Of Credit Facility, Commitment Fee, Environmental Sustainability Performance Indicators, Number Line Of Credit Facility, Commitment Fee, Environmental Sustainability Performance Indicators, Number Derivative [Table] Derivative [Table] Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Entity Small Business Entity Small Business Market Intelligence Market Intelligence Segment [Member] Market Intelligence Segment [Member] Schedule of Revenue and Long-lived Assets by Geographic Region Revenue from External Customers by Geographic Areas [Table Text Block] Net income attributable to redeemable noncontrolling interests Net Income (Loss) Attributable to Redeemable Noncontrolling Interest Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Noncontrolling Interests Noncontrolling Interest [Member] Terminated derivative, notional amount Derivative, Terminated, Notional Amount Derivative, Terminated, Notional Amount Document Transition Report Document Transition Report Equity in Income on Unconsolidated Subsidiaries Equity Method Investments [Policy Text Block] Recently Issued or Adopted Accounting Standards Accounting Standards Update and Change in Accounting Principle [Text Block] Reportable Legal Entities Reportable Legal Entities [Member] Amounts attributable to S&P Global Inc. common shareholders: Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Noncontrolling Interest [Table] Noncontrolling Interest [Table] Underlying Securities Award Underlying Securities Amount Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Nature of Operations Nature Of Operations [Policy Text Block] Nature Of Operations Income Taxes Income Tax Disclosure [Text Block] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Hedging Designation [Axis] Hedging Designation [Axis] Total equity Beginning balance Ending balance Equity, Including Portion Attributable to Noncontrolling Interest Average price paid per share (USD per share) Shares Acquired, Average Cost Per Share Document Type Document Type Earnings Per Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Loss Contingencies [Table] Loss Contingencies [Table] Other non-current assets Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent Pension and other postretirement benefit plans, net of income tax effect Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Product and Service [Axis] Product and Service [Axis] Accelerated Share Repurchases, Date [Axis] Accelerated Share Repurchases, Date [Axis] Gain (Loss) reclassified from Accumulated Other Comprehensive Loss into Income (effective portion) Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax Derivative Contract [Domain] Derivative Contract [Domain] Net Investment Hedges Net Investment Hedging [Member] 4.5% Senior Notes due 2048 Senior Notes 4.5% Due 2048 [Member] Senior Notes 4.5% Due 2048 Revenue Revenue Revenue from Contract with Customer, Excluding Assessed Tax All Individuals All Individuals [Member] 4.25% Senior Notes due 2029 4.25% Senior Notes Due May 1, 2029 [Member] 4.25% Senior Notes Due May 1, 2029 Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Services transferred at a point in time Transferred at Point in Time [Member] Name Forgone Recovery, Individual Name Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] 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] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Gain on sale after tax Equity Method Investment, Realized Gain (Loss) on Disposal 1.25% Senior Notes due 2030 Senior Notes 1.25% Due 2030 [Member] Senior Notes 1.25% Due 2030 Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Disposal Group Name [Axis] Disposal Group Name [Axis] 2031 and beyond Lessee, Operating Lease, Liability, To Be Paid, After Year Four Lessee, Operating Lease, Liability, To Be Paid, After Year Four 4.80% Senior Notes, due 2035 Senior Notes 4.80% Due 2035 [Member] Senior Notes 4.80% Due 2035 Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Share Repurchase Program [Domain] Share Repurchase Program [Domain] 3.70% Senior Notes due 2052 Senior Notes 3.70% Due 2052 [Member] Senior Notes 3.70% Due 2052 Current liabilities: Liabilities, Current [Abstract] Geographical [Axis] Geographical [Axis] Schedule of Pre-tax Gains (Losses) on Cash Flow Hedges Derivative Instruments, Gain (Loss) [Table Text Block] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Diluted (USD per share) Earnings Per Share, Diluted Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Accounts receivable, net of allowance for doubtful accounts: 2026 - $53; 2025 - $50 Accounts Receivable, after Allowance for Credit Loss, Current Title of 12(b) Security Title of 12(b) Security Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Expected contributions towards retirement plans, remainder of the year Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year Excise tax, payable Share Repurchase Program, Excise Tax, Payable Earnings per share attributable to S&P Global Inc. common shareholders: Earnings Per Share [Abstract] Earnings Per Share [Abstract] Restructuring Plan [Axis] Restructuring Plan [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Ownership interest of subsidiary (as a percent) Subsidiary, Ownership Percentage, Parent Other Noncontrolling Interest, Other Adjustments Noncontrolling Interest, Other Adjustments Unearned revenue Increase (Decrease) in Contract with Customer, Liability 3.9% Senior Notes due 2062 Senior Notes 3.9% Due 2062 [Member] Senior Notes 3.9% Due 2062 Other Stockholders' Equity, Other Less: Imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Shares delivered and purchased (shares) Treasury Stock, Shares, Acquired Accelerated Share Repurchases, Date [Domain] Accelerated Share Repurchases, Date [Domain] Award Timing Disclosures [Line Items] Assets held for sale Assets held for sale Disposal Group, Including Discontinued Operation, Assets, Current Accrued compensation and contributions to retirement plans Employee-related Liabilities, Current Total undiscounted lease payments Lessee, Operating Lease, Liability, to be Paid Option to extend lease period (in years) Lessee, Operating Lease, Renewal Term Change in fair value, net of tax Other comprehensive income (loss) before reclassifications Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Equity Equity [Text Block] S&P DJ Indices S&P/DJ Indices [Member] S&P/DJ Indices [Member] Distributions payable to redeemable noncontrolling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Pension and other postretirement benefit plans Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax Net income attributable to S&P Global Inc. Net income Net Income (Loss) Attributable to Parent Intersegment Elimination Intersegment Eliminations [Member] Expiration Date Trading Arrangement Expiration Date Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Axis] Property and equipment, net of accumulated depreciation: 2026 - $871; 2025 - $861 Property, Plant and Equipment, Net Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Initial Charge Recorded Restructuring Charges Significant expenses Costs And Expenses, Excluding Amortization Of Intangible Assets And Gain (Loss) On Disposition Of Business Costs And Expenses, Excluding Amortization Of Intangible Assets And Gain (Loss) On Disposition Of Business Repurchase of treasury shares Total cash utilized Total Cash Utilized Payments for Repurchase of Common Stock Adoption Date Trading Arrangement Adoption Date Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Accounts receivable Increase (Decrease) in Accounts Receivable Schedule of Restructuring and Related Costs [Table] Restructuring Cost [Table] Asia Asia [Member] Entity Current Reporting Status Entity Current Reporting Status Derivative [Line Items] Derivative [Line Items] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Operating profit Operating profit Operating Income (Loss) Revolving line of credit Line of Credit [Member] Retained income Retained Earnings (Accumulated Deficit) Cross currency swaps Cross Currency Interest Rate Contract [Member] Gain (Loss) reclassified from Accumulated Other Comprehensive Loss into Income (effective portion) Other Comprehensive Income (Loss), Net Investment Hedge, Gain (Loss), Reclassification, before Tax Derivative maturity Derivative, Remaining Maturity Statement of Financial Position [Abstract] Statement of Financial Position [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] Executive Category: Executive Category [Axis] Recurring variable revenue Recurring Variable Revenue [Member] Recurring Variable Revenue Foreign exchange forward contracts Foreign exchange forward contracts Foreign Exchange Forward [Member] Services transferred over time Transferred over Time [Member] 5.25% Senior Notes due 2033 Senior Notes 5.25% Due 2033 [Member] Senior Notes 5.25% Due 2033 Current Fiscal Year End Date Current Fiscal Year End Date Unrealized Gain (Loss) on Cash Flow Hedges Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] 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] Liabilities held for sale Liabilities held for sale Disposal Group, Including Discontinued Operation, Liabilities, Current Statement [Table] Statement [Table] Other (income) expense, net Other (income) expense, net Other Nonoperating Income (Expense) Workforce reduction Restructuring and Related Cost, Number of Positions Eliminated Deferred income taxes Deferred Income Tax Expense (Benefit) Adjustments to reconcile net income to cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] 2.3% Senior Notes due 2060 Senior Notes 2.3% Due 2060 [Member] Senior Notes 2.3% Due 2060 Financing Activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Less: net income attributable to noncontrolling interests Income (Loss) from Continuing Operations, Net of Tax, Attributable to Noncontrolling Interest Timing of Transfer of Good or Service [Domain] Timing of Transfer of Good or Service [Domain] Unrecognized tax benefits Unrecognized Tax Benefits Antidilutive shares excluded from computation of diluted earnings (shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Weighted-average number of common shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Total estimated future lease payments Unrecorded Unconditional Purchase Obligation All Adjustments to Compensation All Adjustments to Compensation [Member] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Amendment Flag Amendment Flag Less: common stock in treasury Treasury Stock, Common, Value Termination Date Trading Arrangement Termination Date Cash used for financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Measure: Measure [Axis] Contract asset Contract with Customer, Asset, before Allowance for Credit Loss Weighted-average discount rate Operating Lease, Weighted Average Discount Rate, Percent Derivatives Derivative, Fair Value, Net Accrued interest and penalties associated with unrecognized tax benefits Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest, Excluding Redeemable Noncontrolling Interest Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest, Excluding Redeemable Noncontrolling Interest Basic (shares) Basic weighted-average number of common shares outstanding (shares) Weighted Average Number of Shares Outstanding, Basic Disposal Group Classification [Domain] Disposal Group Classification [Domain] Schedule of Calculation for Basic and Diluted Earnings per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Segment Reporting [Abstract] Segment Reporting [Abstract] Operating-related expenses Cost of Revenue Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount 2.90% Senior Notes due 2032 Senior Notes 2.90% Due 2032 [Member] Senior Notes 2.90% Due 2032 Entity Tax Identification Number Entity Tax Identification Number Expenses: Costs and Expenses [Abstract] Restructuring and Related Activities [Abstract] Restructuring and Related Activities [Abstract] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Common stock, par value (USD per share) Common Stock, Par or Stated Value Per Share Common stock issued (shares) Common Stock, Shares, Issued Weighted-average remaining lease term (years) Operating Lease, Weighted Average Remaining Lease Term Schedule of Redeemable Noncontrolling Interests Redeemable Noncontrolling Interest [Table Text Block] Accounts receivable, net Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net Use of Estimates Use of Estimates, Policy [Policy Text Block] Interest expense, net Interest Expense, Nonoperating Trading Arrangement: Trading Arrangement [Axis] Net change in prepaid/accrued income taxes Increase (Decrease) in Income Taxes Payable Total Shareholder Return Amount Total Shareholder Return Amount Loss Contingencies [Line Items] Loss Contingencies [Line Items] Foreign currency translation adjustment, net of income tax effect Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Insider Trading Arrangements [Line Items] Corporate Corporate Unallocated Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Security Exchange Name Security Exchange Name Total liabilities Liabilities Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Distributions to noncontrolling interest holders Payments of Ordinary Dividends, Noncontrolling Interest Commitment fee ratio Line of Credit Facility, Commitment Fee Percentage Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Five-year Revolving Credit Facility Five Year Facility, Expiring December 17, 2029 [Member] Five Year Facility [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Stock repurchased during period (in shares) Stock Repurchased During Period, Shares Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Other current liabilities Other Liabilities, Current Shares authorized for repurchase, compared to total common stock outstanding (as a percent) Maximum Number Of Shares Authorized For Repurchase Under Stock Repurchase Plan As Percentage Of Outstanding Common Stock Maximum number of shares authorized for repurchase under stock repurchase plan as percentage of outstanding common stock. Pension and other postretirement benefits Liability, Defined Benefit Plan, Noncurrent Statement [Line Items] Statement [Line Items] Consolidation Items [Axis] Consolidation Items [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Restricted Stock and Unit Awards Restricted Stock and Unit Awards [Member] Restricted Stock and Unit Awards Cash and cash equivalents Cash and Cash Equivalent Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration] Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration] Common Stock $1 par Common Stock [Member] Cash paid for amounts included in the measurement for operating lease liabilities Cash Paid for Amounts Included in the Measurement for Lease Liabilities [Abstract] Cash Paid for Amounts included in the Measurement for Lease Liabilities [Abstract] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Net change in cash, cash equivalents, and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Effect of dilutive securities (shares) Weighted Average Number of Shares Outstanding, Diluted, Adjustment