Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Weighted-average number of common shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Trading Arrangement: Trading Arrangement [Axis] Maximum Maximum [Member] Statistical Measurement [Domain] Statistical Measurement [Domain] Title of 12(b) Security Title of 12(b) Security Document Fiscal Year Focus Document Fiscal Year Focus Period of recognition for remaining performance obligation Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Adjustment to Compensation, Amount Adjustment to Compensation Amount Schedule of Components of Other Income, net Schedule of Other Nonoperating Income, by Component [Table Text Block] Segment Reporting [Abstract] Segment Reporting [Abstract] Restructuring Plan [Axis] Restructuring Plan [Axis] Common stock, $1 par value: authorized - 600 million shares; issued - 2026 and 2025 415 million shares Common Stock, Value, Issued 2027 Lessee, Operating Lease, Liability, to be Paid, Year One Accrued compensation and contributions to retirement plans 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] Right of use assets obtained in exchange for lease obligations Right-of-Use Assets Obtained in Exchange for Lease Obligations [Abstract] Right-of-Use Assets Obtained in Exchange for Lease Obligations [Abstract] Employee Benefits Retirement Benefits [Text Block] Services transferred over time Transferred over Time [Member] Revolving line of credit Line of Credit [Member] Restatement Determination Date Restatement Determination Date Ratings Ratings Ratings Segment [Member] Ratings Segment [Member] Equity investments in unconsolidated subsidiaries Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Expected return on assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Derivative Instrument [Axis] Derivative Instrument [Axis] 2025 Repurchase Program Two Thousand Twenty Five Repurchase Program [Member] Two Thousand Twenty Five Repurchase Program Minimum interest in joint venture (as a percent) Interest In Joint Venture Minimum Percentage Interest In Joint Venture Minimum Percentage Amendment Flag Amendment Flag Current liabilities: Liabilities, Current [Abstract] Average price paid per share (USD per share) Shares Acquired, Average Cost Per Share Provision for losses on accounts receivable Accounts Receivable, Credit Loss Expense (Reversal) Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Disposal Group Classification [Axis] Disposal Group Classification [Axis] Uncapped ASR, February 19, 2025 Uncapped Accelerated Share Repurchases Initiated February 19 2025 [Member] Uncapped Accelerated Share Repurchases Initiated February 19 2025 Loss Contingencies [Table] Loss Contingencies [Table] Initial Shares Delivered Initial Award [Member] Initial Award [Member] Other comprehensive income: Other Comprehensive Income (Loss), Net of Tax [Abstract] Timing of Transfer of Good or Service [Domain] Timing of Transfer of Good or Service [Domain] Pension and other postretirement benefit plans Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Additional Shares Delivered Additional Award [Member] Additional Award [Member] Entity Address, State or Province Entity Address, State or Province PEO Total Compensation Amount PEO Total Compensation Amount Common stock, par value (USD per share) Common Stock, Par or Stated Value Per Share Foreign currency translation adjustment, net of income tax effect Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Other intangible assets, net Intangible Asset, Excluding Goodwill, after Accumulated Amortization Share Repurchase Program [Domain] Share Repurchase Program [Domain] Notional amount of derivative Derivative, Notional Amount Basic (shares) Basic weighted-average number of common shares outstanding (shares) Weighted Average Number of Shares Outstanding, Basic Retirement Benefits [Abstract] Retirement Benefits [Abstract] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Loss Contingencies [Line Items] Loss Contingencies [Line Items] Employee withholding tax on share-based payments, excise tax payments on share repurchases, 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 Number of reportable segments Number of Reportable Segments Total current liabilities Liabilities, Current 2030 Lessee, Operating Lease, Liability, to be Paid, Year Four Mobility Global Mobility Global [Member] Mobility Global Unearned revenue Disposal Group, Including Discontinued Operation, Deferred Revenue, Current Net income: Net income: Earnings Per Share, Basic and Diluted EPS [Abstract] Earnings Per Share, Basic and Diluted EPS Net change in other assets and liabilities Increase (Decrease) in Other Noncurrent Assets and Liabilities, Net Pre -tax loss expected to be reclassified within 12 months Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months Entity Address, City or Town Entity Address, City or Town Derivatives Derivative, Fair Value, Net Restricted stock and unit awards granted in period (shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] 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] Total Number of Shares Purchased Completed Award [Member] Completed Award [Member] Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Sublease income Sublease Income Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] 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] Net other comprehensive income Other Comprehensive Income (Loss), Net of Tax Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] U.S. UNITED STATES Other non-current assets Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent Unrealized gain on cash flow hedges, net of income tax effect Gain (Loss) recognized in Accumulated Other Comprehensive Loss (effective portion) Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Indices Indices Indices Segment [Member] Indices Segment [Member] Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Class of Treasury Stock [Table] Class of Treasury Stock [Table] Recently Issued or Adopted Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Unearned revenue Increase (Decrease) in Contract with Customer, Liability Fincentric Fincentric [Member] Fincentric Schedule of Segment Information Segment Reporting [Table Text Block] Noncontrolling Interests Noncontrolling Interest [Member] Use of Estimates Use of Estimates, Policy [Policy Text Block] Related Party [Axis] Related and Nonrelated Parties [Axis] Contract Assets, Unearned Revenue, Remaining Performance Obligations and Costs to Obtain Contracts Revenue from Contract with Customer [Policy Text Block] Income tax effect Actuarial losses, tax expense (less than) Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax 2026 Restructuring Plan Restructuring Plan, 2026 [Member] Restructuring Plan, 2026 2022 Repurchase Program Two Thousand Twenty Two Repurchase Program [Member] Two Thousand Twenty Two Repurchase Program Total debt Long-term debt Long-Term Debt 4.25% Senior Notes, due 2031 Senior Notes 4.25% Due 2031 [Member] Senior Notes 4.25% Due 2031 Schedule of Maturities of Operating Lease Liabilities Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Net change in prepaid/accrued income taxes Increase (Decrease) in Income Taxes Payable Document Period End Date Document Period End Date 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] Uncapped ASR, May 6 2025 Uncapped Accelerated Share Repurchases Initiated May 6 2025 [Member] Uncapped Accelerated Share Repurchases Initiated May 6 2025 Cash provided by (used for) 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] Unrecognized tax benefits Unrecognized Tax Benefits Liabilities held for sale Liabilities held for sale Disposal Group, Including Discontinued Operation, Liabilities, Current Debt issued Debt Instrument, Face Amount 2028 Lessee, Operating Lease, Liability, to be Paid, Year Two Equity Equity [Text Block] Expenses: Costs and Expenses [Abstract] Security Exchange Name Security Exchange Name Credit facility term Debt Instrument, Term Less: common stock in treasury Treasury Stock, Common, Value Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Consolidation Items [Domain] Consolidation Items [Domain] Current lease liabilities Operating Lease, Liability, Current Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Energy Energy Energy Segment [Member] Energy Segment Earnings Per Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Earnings per share attributable to S&P Global Inc. common shareholders: Earnings Per Share [Abstract] Earnings Per Share [Abstract] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [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 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] Income taxes currently payable Accrued Income Taxes, Current Company Selected Measure Name Company Selected Measure Name Distributions to noncontrolling interest holders Payments of Ordinary Dividends, Noncontrolling Interest Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Award Date [Axis] Award Date [Axis] Proceeds from dispositions, net Proceeds from Divestiture of Businesses, Net of Cash Divested 4.00% Senior Notes due 2026 4.00% Senior Notes Due March 1, 2026 [Member] 4.00% Senior Notes Due March 1, 2026 Ownership interest of subsidiary (as a percent) Subsidiary, Ownership Percentage, Parent Pension and Postretirement Benefit Plans Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Commitment fee ratio Line of Credit Facility, Commitment Fee Percentage Credit Facility [Domain] Credit Facility [Domain] Operating Activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Accounts payable Disposal Group, Including Discontinued Operation, Accounts Payable, Current Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Diluted (shares) Diluted weighted-average number of common shares outstanding (shares) Weighted Average Number of Shares Outstanding, Diluted Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Cross currency swaps Cross Currency Interest Rate Contract [Member] Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Mobility Mobility Mobility Mobility Segment [Member] Mobility Segment Pension and other postretirement benefits Liability, Defined Benefit Plan, Noncurrent Disposal Group Name [Domain] Disposal Group Name [Domain] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Uncapped ASR, December 4 2025 Uncapped Accelerated Share Repurchased Initiated December 4 2025 [Member] Uncapped Accelerated Share Repurchased Initiated December 4 2025 Commercial paper Commercial Paper [Member] Derivative Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Less: Imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Award Date [Domain] Award Date [Domain] Schedule of Assets and Liabilities Held-for-Sale Disposal Groups, Including Discontinued Operations [Table Text Block] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Contribution towards retirement plans Defined Benefit Plan, Plan Assets, Contributions by Employer Effect of dilutive securities (shares) Weighted Average Number of Shares Outstanding, Diluted, Adjustment Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Operating cash flows for operating leases Operating Lease, Payments Derivative, cash received on hedge Derivative, Cash Received on Hedge Award Timing Predetermined Award Timing Predetermined [Flag] Restricted cash Restricted cash Restricted Cash, Current Less: Treasury Stock Treasury Stock, Common [Member] Pre-tax restructuring charge Severance Costs Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Employee stock plans APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Effective income tax rate (as a percent) Effective Income Tax Rate Reconciliation, Percent Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Total undiscounted lease payments Lessee, Operating Lease, Liability, to be Paid Asset-linked fees Asset-Linked Fees [Member] Asset-Linked Fees [Member] 2.45% Senior Notes due 2027 Senior Notes 2.45% Due 2027 [Member] Senior Notes 2.45% Due 2027 All Executive Categories All Executive Categories [Member] 5.05% Senior Notes, due 2029 Senior Notes 5.05% Due 2029 [Member] Senior Notes 5.05% Due 2029 2.95% Senior Notes due 2027 Senior Notes 2.95% due 2027 [Member] Senior Notes 2.95% due 2027 Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Long-term debt, fair value Long-Term Debt, Fair Value Reductions to restructuring reserve Restructuring Reserve, Period Increase (Decrease) Schedule of Net Periodic Benefit Cost Schedule of Net Benefit Costs [Table Text Block] Redeemable noncontrolling interests (Note 8) Balance at beginning of period Balance at end of period Redeemable Noncontrolling Interest, Equity, Carrying Amount Depreciation Depreciation Depreciation 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 Accounts receivable, net Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net Antidilutive Securities [Axis] Antidilutive Securities [Axis] Right of use assets Lease right of use assets Operating Lease, Right-of-Use Asset 4.75% Senior Notes due 2028 4.75% Senior Notes Due August 1, 2028 [Member] 4.75% Senior Notes Due August 1, 2028 AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] 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 Accounting Changes and Error Corrections [Abstract] Accounting Changes and Error Corrections [Abstract] Option to extend lease period (in years) Lessee, Operating Lease, Renewal Term Schedule of Calculation for Basic and Diluted Earnings per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Segment and Related Information Segment Reporting [Text Block] Minimum Minimum [Member] Dividends paid to shareholders Payments of Ordinary Dividends, Common Stock Expiration Date Trading Arrangement Expiration Date Hedging Relationship [Axis] Hedging Relationship [Axis] Liabilities Liabilities [Abstract] Effect of exchange rate changes on cash Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement Location [Axis] Location, Statement of Income, Balance [Axis] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Total 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] Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Axis] Disposal Group, Including Discontinued Operations [Line Items] Disposal Group, Including Discontinued Operations [Line Items] Business Combination [Line Items] Business Combination [Line Items] Dividends (Dividend declared per common share) Dividends, Common Stock Net periodic benefit cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) 3.25% Senior Notes due 2049 Senior Notes 3.25% Due 2049 [Member] Senior Notes 3.25% Due 2049 Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Derivative [Table] Derivative [Table] Common stock authorized (shares) Common Stock, Shares Authorized Earnings per share attributable to S&P Global Inc. common shareholders: Earnings Per Share Reconciliation [Abstract] Subsidiary shares distributed (as a percent) Percentage Of Subsidiary Shares Distributed Percentage Of Subsidiary Shares Distributed Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [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 Schedule of Restructuring and Related Costs [Table] Restructuring Cost [Table] Investing Activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Remaining lease terms Lessee, Operating Lease, Remaining Lease Term 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 Segment Reporting [Line Items] Segment Reporting [Line Items] Uncapped Accelerated Share Repurchases Initiated May 7 2026 Uncapped Accelerated Share Repurchases Initiated May 7 2026 [Member] Uncapped Accelerated Share Repurchases Initiated May 7 2026 Document Quarterly Report Document Quarterly Report Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Capitalized contract cost amortization period (in years) Capitalized Contract Cost, Amortization Period 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] Segments [Domain] European region Europe [Member] Interest rate swap contracts Interest rate swap contracts Interest Rate Swap [Member] Uncapped ASR, October 28, 2024 Uncapped Accelerated Share Repurchases Initiated October 28, 2024 [Member] Uncapped Accelerated Share Repurchases Initiated October 28, 2024 Gain on disposition after tax Gain (Loss) on Disposition of Business, After Tax Gain (Loss) on Disposition of Business, After Tax Debt Debt Disclosure [Text Block] Repayments of long term debt Repayments of Long-Term Debt Disposal Group Classification [Domain] Disposal Group Classification [Domain] Unamortized debt discount and issuance costs (less than) Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Sales usage-based royalties Sales Usage-Based Royalties [Member] Sales Usage-Based Royalties [Member] Schedule of Initial Restructuring Charge Recorded and the Ending Reserve Balance Restructuring and Related Costs [Table Text Block] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Restructuring reserve balance Ending Reserve Balance Restructuring Reserve Business Combination [Table] Business Combination [Table] Acquisitions and Divestitures Mergers, Acquisitions and Dispositions Disclosures [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 expenses Costs and Expenses Adoption Date Trading Arrangement Adoption Date Interest rate (as a percent) Debt Instrument, Interest Rate, Stated Percentage Enterprise Data Management and ThinkFolio Enterprise Data Management and ThinkFolio [Member] Enterprise Data Management and ThinkFolio Total equity — controlling interests Equity, Attributable to Parent Disposal Group, Disposed of by Sale, Not Discontinued Operations Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] ARS agreement transactions Accelerated Stock Repurchase Program, Number Of Accounting Transactions Accelerated Stock Repurchase Program, Number Of Accounting Transactions ASSETS 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 Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Present value of lease liabilities Operating Lease, Liability Insider Trading Policies and Procedures [Line Items] Accelerated share repurchases initial delivery percentage (as a percent) Accelerated Share Repurchases Initial Delivery Percentage of Shares Accelerated Share Repurchases Initial Delivery Percentage of Shares Allowance for doubtful accounts Accounts Receivable, Allowance for Credit Loss, Current Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Shares authorized to be repurchased (shares) Share Repurchase Program, Authorized, Number of Shares Prepaid and other current assets Prepaid Expense and Other Assets, Current Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Deferred income taxes Deferred Income Tax Expense (Benefit) Selling and general expenses Selling, General and Administrative Expense Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Accelerated Share Repurchases, Date [Axis] Accelerated Share Repurchases, Date [Axis] Antidilutive shares excluded from computation of diluted earnings (shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Entity Central Index Key Entity Central Index Key Accumulated depreciation Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization Additional paid-in capital Additional Paid in Capital, Common Stock All Adjustments to Compensation All Adjustments to Compensation [Member] Corporate Corporate Unallocated Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] 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 Remaining performance obligation percentage Revenue, Remaining Performance Obligation, Percentage Other Stockholders' Equity, Other Change in fair value, net of tax Other comprehensive income (loss) before reclassifications Other Comprehensive Income (Loss), before Reclassifications, Net of Tax 5.45% Senior Notes, due 2031 Senior Notes 5.45% Due 2031 [Member] Senior Notes 5.45% Due 2031 Equity: Equity, Attributable to Parent [Abstract] Income Statement [Abstract] Income Statement [Abstract] Document Transition Report Document Transition Report Ownership [Axis] Ownership [Axis] Net (gain) loss from investments Gain (Loss) on Investments Restructuring Plan [Domain] Restructuring Plan [Domain] Designated as Hedging Instrument Designated as Hedging Instrument [Member] Intersegment Elimination Intersegment Eliminations [Member] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [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 Variable interest rate Debt Instrument, Basis Spread on Variable Rate Rest of the world Rest Of World [Member] Rest of world. Uncapped ASR, February 12, 2026 Uncapped Accelerated Share Repurchases Initiated February 12 2026 [Member] Uncapped Accelerated Share Repurchases Initiated February 12 2026 City Area Code City Area Code 6.55% Senior Notes due 2037 Senior Notes 6.55% Due 2037 [Member] Senior Notes 6.55% Due 2037 Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Change in redemption value of redeemable noncontrolling interests Noncontrolling Interest, Change In Redemption Value Of Redeemable Noncontrolling Interest Noncontrolling Interest, Change In Redemption Value Of Redeemable Noncontrolling Interest All Individuals All Individuals [Member] Schedule of Revenue and Long-lived Assets by Geographic Region Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue [Table Text Block] Name Forgone Recovery, Individual Name Weighted average recognition period Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Lease term (in years) Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract Statement [Line Items] Statement [Line Items] Total assets Total assets Assets Entity [Domain] Entity [Domain] Reportable Legal Entities Reportable Legal Entities [Member] Less: net income attributable to noncontrolling interests Income (Loss) from Continuing Operations, Net of Tax, Attributable to Noncontrolling Interest Operating Segments Operating Segments [Member] Interest expense, net Interest expense, net Interest Expense, Nonoperating Non-transaction Non-Transaction [Member] Non-Transaction [Member] Stock-Based Compensation Share-Based Payment Arrangement [Text Block] Changes in short-term investments Payments for (Proceeds from) Short-Term Investments Schedule of Lease Term and Discount Rate Schedule Of Lease Terms And Discount Rates [Table Text Block] Schedule of Lease Terms and Discount Rates [Table Text Block] PEO PEO [Member] Revenues recognized Contract With Customer, Liability, Revenue Recognized, Including Opening Balance Contract With Customer, Liability, Revenue Recognized, Including Opening Balance Stock-based compensation expense Share-Based Payment Arrangement, Expense Other non-current liabilities Other Liabilities, Noncurrent Goodwill Goodwill Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Weighted-average grant fate fair value (USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Retained Income Retained Earnings [Member] Lease liabilities — non-current Non-current lease liabilities Operating Lease, Liability, Noncurrent Revolving Credit Facility Revolving Credit Facility [Member] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Actual shares outstanding at period end (shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Foreign Currency Translation Adjustments Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Diluted (USD per share) Earnings Per Share, Diluted Subscription Subscription [Member] Subscription [Member] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Entity Current Reporting Status Entity Current Reporting Status Cash used for financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Line of credit facility, potential reduction In commitment fee Line Of Credit Facility, Potential Reduction In Commitment Fee Line Of Credit Facility, Potential Reduction In Commitment Fee Income tax effect Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax Cash Flow Hedges Cash Flow Hedging [Member] CME Group CME Group [Member] CME Group [Member] Amortization of intangibles Amortization of intangibles Intangible Asset, Finite-Lived, Amortization Expense Ownership [Domain] Ownership [Domain] 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 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] Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Financing Activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Property and equipment, net of accumulated depreciation: 2026 - $852; 2025 - $861 Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Revenue Revenue Revenue from Contract with Customer, Excluding Assessed Tax OSTTRA OSTTRA [Member] OSTTRA Schedule of Location and Fair Value Amounts of Cash Flow Hedges Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] Interest cost Defined Benefit Plan, Interest Cost 2025 Restructuring Plan Restructuring Plan, 2025 [Member] Restructuring Plan, 2025 Assets held for sale Assets held for sale Disposal Group, Including Discontinued Operation, Assets, Current Amounts attributable to S&P Global Inc. common shareholders: Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] 2.7% Sustainability-Linked Senior Notes, due 2029 Sustainability-Linked Senior Notes 2.70% Due 2029 [Member] Sustainability-Linked Senior Notes 2.70% Due 2029 Schedule of Cash Flow Hedges included in AOCI Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block] Other current liabilities Increase (Decrease) in Other Current Liabilities Weighted-average discount rate Operating Lease, Weighted Average Discount Rate, Percent Segment Reporting [Table] Segment Reporting [Table] Payment of excise tax Share Repurchase Program, Excise Tax Expected contributions towards retirement plans, remainder of the year Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year Pre-tax gain on sale Equity Method Investment Realized Gain (Loss) On Disposal, Before Tax Equity Method Investment Realized Gain (Loss) On Disposal, Before Tax Property and equipment, net Disposal Group, Including Discontinued Operation, Property, Plant, and Equipment, Current Schedule of Components of Lease Expense and Supplemental Cash Flow Information Lease, Cost [Table Text Block] 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 profit Segment operating profit Operating Income (Loss) Remaining performance obligations Revenue, Remaining Performance Obligation, Amount Current Fiscal Year End Date Current Fiscal Year End Date Gain on dispositions Gain on dispositions Gain on dispositions Gain (Loss) on Disposition of Business Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Asia Asia [Member] Derivative [Line Items] Derivative [Line Items] Stock repurchased during period (in shares) Stock Repurchased During Period, Shares Total estimated future lease payments Unrecorded Unconditional Purchase Obligation 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] 2.5% Senior Notes due 2029 Senior Notes 2.5% Due 2029 [Member] Senior Notes 2.5% Due 2029 Dividends declared per common share (USD 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] Service cost Defined Benefit Plan, Service Cost Distributions payable to redeemable noncontrolling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Gain (Loss) reclassified from Accumulated Other Comprehensive Loss into Income (effective portion) Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax 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 (shares) Common Stock, Shares, Issued Measure: Measure [Axis] Market Intelligence Market Intelligence Market Intelligence Segment [Member] Market Intelligence Segment [Member] Terminated derivative, notional amount Derivative, Terminated, Notional Amount Derivative, Terminated, Notional Amount Equity Components [Axis] Equity Components [Axis] Accounts receivable Increase (Decrease) in Accounts Receivable Related Party Related Party [Member] Product and Service [Domain] Product and Service [Domain] Centennial Centennial [Member] Centennial Capitalized contract costs Capitalized Contract Cost, Net Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Entity Interactive Data Current Entity Interactive Data Current Deferred tax liability — non-current Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Gain (loss) on undesignated derivative instruments Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Nature of Operations Nature Of Operations [Policy Text Block] Nature Of Operations Redemption value adjustment Noncontrolling Interest, Change in Redemption Value Entity Small Business Entity Small Business Comprehensive income attributable to S&P Global Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent 2029 Lessee, Operating Lease, Liability, to be Paid, Year Three Termination Date Trading Arrangement Termination Date Noncontrolling Interest [Table] Noncontrolling Interest [Table] Remaining shares available under repurchase program (shares) Share Repurchase Program, Remaining Authorized, Number of Shares Disposal Group, Disposed of Other than by Sale, Not Discontinued Operation, Spinoff Disposal Group, Disposed of Other than by Sale, Not Discontinued Operation, Spinoff [Member] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Net interest income Interest Income (Expense), Operating Pension and other postretirement benefit plans, net of income tax effect 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 non-current assets Other Assets, Noncurrent Document Type Document Type Unrecognized tax benefits, income tax penalties and interest accrued Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Acquisitions, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Income tax effect Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax Fair Value as of Grant Date Award Grant Date Fair Value 4.5% Senior Notes due 2048 Senior Notes 4.5% Due 2048 [Member] Senior Notes 4.5% Due 2048 Nature of Operations and Basis of Presentation Significant Accounting Policies [Text Block] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] 4.25% Senior Notes due 2029 4.25% Senior Notes Due May 1, 2029 [Member] 4.25% Senior Notes Due May 1, 2029 Arrangement Duration Trading Arrangement Duration Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Consolidation Items [Axis] Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name 6.05% Senior Notes, due 2036 Senior Notes 6.05% Due 2036 [Member] Senior Notes 6.05% Due 2036 Net Investment Hedges Net Investment Hedging [Member] Income before taxes on income 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 (Note 12) Commitments and Contingencies Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] 1.25% Senior Notes due 2030 Senior Notes 1.25% Due 2030 [Member] Senior Notes 1.25% Due 2030 Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Gain on sale after tax Equity Method Investment, Realized Gain (Loss) on Disposal Equity in income on unconsolidated subsidiaries Equity in income on unconsolidated subsidiaries Income (Loss) from Equity Method Investments Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Stockholders' 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 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 Executive Category: Executive Category [Axis] Services transferred at a point in time Transferred at Point in Time [Member] 3.70% Senior Notes due 2052 Senior Notes 3.70% Due 2052 [Member] Senior Notes 3.70% Due 2052 LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Award Type [Domain] Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount 2026 (Excluding the six months ended June 30, 2026) Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Gain (Loss) reclassified from Accumulated Other Comprehensive Loss into Income (effective portion) Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax Shares delivered and purchased (shares) Treasury Stock, Shares, Acquired Noncontrolling interest ownership by noncontrolling owners (as a percent) Subsidiary, Ownership Percentage, Noncontrolling Owner PEO Name PEO Name Geographical [Axis] Geographical [Axis] Other components of net periodic benefit cost Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component Unrealized Gain (Loss) on Cash Flow Hedges Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Less: other segment items Segment Reporting, Other Segment Item, Amount Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Legal Entity [Axis] Legal Entity [Axis] Unrealized gain on cash flow hedges Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Share repurchases, including excise tax Treasury Stock, Value, Acquired, Cost Method Equity in Income on Unconsolidated Subsidiaries Equity Method Investments [Policy Text Block] Cash, cash equivalents, and restricted cash at beginning of period Cash, cash equivalents, and restricted cash at end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Other Noncontrolling Interest, Other Adjustments Noncontrolling Interest, Other Adjustments 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] Workforce reduction Restructuring and Related Cost, Number of Positions Eliminated Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest 3.9% Senior Notes due 2062 Senior Notes 3.9% Due 2062 [Member] Senior Notes 3.9% Due 2062 Debt Instrument [Axis] Debt Instrument [Axis] Stock-based compensation Share-Based Payment Arrangement, Noncash Expense Total lease cost Lease, Cost Disposal Group Name [Axis] Disposal Group Name [Axis] Schedule of Short-term and Long-term Debt Outstanding Schedule of Debt [Table Text Block] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Basic (USD per share) Earnings Per Share, Basic Equity, Class of Treasury Stock [Line Items] Equity, Class of Treasury Stock [Line Items] Goodwill Disposal Group, Including Discontinued Operation, Goodwill, Current Repurchase of treasury shares Total cash utilized Total Cash Utilized Payments for Repurchase of Common Stock Unearned revenue Contract with Customer, Liability, Current Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Schedule of Pre-tax Gains (Losses) on Cash Flow Hedges Derivative Instruments, Gain (Loss) [Table Text Block] Long-term debt Long-term debt Long-Term Debt, Excluding Current Maturities Operating-related expenses Cost of Revenue Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration] Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration] Award Type [Axis] Award Type [Axis] Gain (Loss) recognized in Accumulated Other Comprehensive Loss (effective portion) Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accounts receivable, net of allowance for doubtful accounts: 2026 - $55; 2025 - $50 Accounts Receivable, after Allowance for Credit Loss, Current Retained income Retained Earnings (Accumulated Deficit) S&P DJ Indices S&P/DJ Indices [Member] S&P/DJ Indices [Member] Restructuring and Related Activities [Abstract] Restructuring and Related Activities [Abstract] 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 $1 par Common Stock [Member] Excise tax, payable Share Repurchase Program, Excise Tax, Payable Operating lease cost Operating Lease, Cost Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover page. Cover [Abstract] 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 Derivative Contract [Domain] Derivative Contract [Domain] Equity Awards Adjustments Equity Awards Adjustments [Member] Hedging Relationship [Domain] Hedging Relationship [Domain] Total liabilities and equity Liabilities and Equity Stock Options Share-Based Payment Arrangement, Option [Member] Short-term debt Less: short-term debt including current maturities Debt, Current Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table] Total equity — noncontrolling interests Equity, Attributable to Noncontrolling Interest Recurring variable revenue Recurring Variable Revenue [Member] Recurring Variable Revenue Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] 5.25% Senior Notes due 2033 Senior Notes 5.25% Due 2033 [Member] Senior Notes 5.25% Due 2033 Proceeds from issuance of senior notes, net Proceeds from Issuance of Senior Long-Term Debt Initial Charge Recorded Restructuring Charges Related Party [Domain] Related and Nonrelated Parties [Domain] Accelerated Share Repurchases, Date [Domain] Accelerated Share Repurchases, Date [Domain] Tabular List, Table Tabular List [Table Text Block] Other income, net Other income, net Other Nonoperating Income (Expense) Total SPGI Equity Parent [Member] Payments on senior notes Repayments of Senior Debt Name Awards Close in Time to MNPI Disclosures, Individual Name 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 Redeemable Noncontrolling Interests Redeemable Noncontrolling Interest [Table Text Block] 2.3% Senior Notes due 2060 Senior Notes 2.3% Due 2060 [Member] Senior Notes 2.3% Due 2060 Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Adjustment to Compensation: Adjustment to Compensation [Axis] Reclassification into earnings, net of tax Reclassifications from accumulated other comprehensive income (loss) to net earnings Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Net income attributable to redeemable noncontrolling interests Net Income (Loss) Attributable to Redeemable Noncontrolling Interest Share Repurchase Program [Axis] Share Repurchase Program [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Schedule of Accelerated Share Repurchase Agreements Accelerated Share Repurchases [Table Text Block] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] 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] Foreign exchange forward contracts Foreign exchange forward contracts Foreign Exchange Forward [Member] Hedging Designation [Axis] Hedging Designation [Axis] Credit Facility [Axis] Credit Facility [Axis] Restructuring Restructuring and Related Activities Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Name Measure Name Income Taxes Income Tax Disclosure [Text Block] Accounts payable Accounts Payable, Current Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax Pay vs Performance Disclosure [Line Items] Other Other Noncash Income (Expense) 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 Debt Instrument [Line Items] Debt Instrument [Line Items] Prepaid and other current assets Increase (Decrease) in Other Current Assets Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Unrealized gain (loss) on cash flow hedges Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax Additional Paid-in Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category 2.90% Senior Notes due 2032 Senior Notes 2.90% Due 2032 [Member] Senior Notes 2.90% Due 2032 Name Trading Arrangement, Individual Name Unrecognized compensation expense Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Cash and cash equivalents Cash and Cash Equivalent Operating lease, liability, current, statement of financial position [Extensible List] Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Company Selected Measure Amount Company Selected Measure Amount Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] Net income Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Current assets: Assets, Current [Abstract] Weighted-average remaining lease term (years) Operating Lease, Weighted Average Remaining Lease Term Non-PEO NEO Non-PEO NEO [Member] Senior Notes Senior Notes [Member] Entity Address, Address Line One Entity Address, Address Line One Operating leases Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Provision for taxes on income Income Tax Expense (Benefit) Fair Value Hedging Fair Value Hedging [Member] Award Timing Method Award Timing Method [Text Block] Derivative maturity Derivative, Remaining Maturity 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 Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Amortization of prior service credit / actuarial loss Defined Benefit Plan, Amortization of Gain (Loss) Recently Issued or Adopted Accounting Standards Accounting Standards Update and Change in Accounting Principle [Text Block] Net income attributable to S&P Global Inc. Net income Net Income (Loss) Attributable to Parent Five-year Revolving Credit Facility Five Year Facility, Expiring December 17, 2029 [Member] Five Year Facility [Member] Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Corporate Joint Venture Corporate Joint Venture [Member] Balance Sheet Location [Axis] Location, Statement of Financial Position, Balance [Axis] Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] 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. Schedule of Changes in the Components of Accumulated Other Comprehensive Loss Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Restricted Stock and Unit Awards Restricted Stock and Unit Awards [Member] Restricted Stock and Unit Awards Gain (Loss) recognized in Accumulated Other Comprehensive Loss (effective portion) Other Comprehensive Income (Loss), Net Investment Hedge, Gain (Loss), before Reclassification and Tax Additions to short-term debt, net Proceeds from Short-Term Debt Contract asset Contract with Customer, Asset, before Allowance for Credit Loss 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] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract]