Label	Element	Value
Non-Guarantor Subsidiaries [Member] \| Reportable Legal Entities [Member]
Deferred Income Tax Expense (Benefit)	us-gaap_DeferredIncomeTaxExpenseBenefit	$ 72,000,000
Deferred Income Tax Expense (Benefit)	us-gaap_DeferredIncomeTaxExpenseBenefit	(98,000,000)
Deferred Income Tax Expense (Benefit)	us-gaap_DeferredIncomeTaxExpenseBenefit	38,000,000
Proceeds from Issuance of Senior Long-term Debt	us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt	0
Proceeds from Issuance of Senior Long-term Debt	us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt	0
Other Noncash Income (Expense)	us-gaap_OtherNoncashIncomeExpense	23,000,000
Other Noncash Income (Expense)	us-gaap_OtherNoncashIncomeExpense	(43,000,000)
Other Noncash Income (Expense)	us-gaap_OtherNoncashIncomeExpense	(1,000,000)
Payments of Ordinary Dividends, Noncontrolling Interest	us-gaap_PaymentsOfDividendsMinorityInterest	116,000,000
Payments of Ordinary Dividends, Noncontrolling Interest	us-gaap_PaymentsOfDividendsMinorityInterest	111,000,000
Payments of Ordinary Dividends, Noncontrolling Interest	us-gaap_PaymentsOfDividendsMinorityInterest	154,000,000
Net Cash Provided by (Used in) Financing Activities	us-gaap_NetCashProvidedByUsedInFinancingActivities	(1,714,000,000)
Net Cash Provided by (Used in) Financing Activities	us-gaap_NetCashProvidedByUsedInFinancingActivities	(2,837,000,000)
Net Cash Provided by (Used in) Financing Activities	us-gaap_NetCashProvidedByUsedInFinancingActivities	(3,333,000,000)
Increase (Decrease) in Other Current Liabilities	us-gaap_IncreaseDecreaseInOtherCurrentLiabilities	35,000,000
Increase (Decrease) in Other Current Liabilities	us-gaap_IncreaseDecreaseInOtherCurrentLiabilities	(31,000,000)
Increase (Decrease) in Other Current Liabilities	us-gaap_IncreaseDecreaseInOtherCurrentLiabilities	(34,000,000)
Payments to Acquire Productive Assets	us-gaap_PaymentsToAcquireProductiveAssets	32,000,000
Payments to Acquire Productive Assets	us-gaap_PaymentsToAcquireProductiveAssets	36,000,000
Payments to Acquire Productive Assets	us-gaap_PaymentsToAcquireProductiveAssets	16,000,000
Payments for (Proceeds from) Short-term Investments	us-gaap_PaymentsForProceedsFromShortTermInvestments	1,000,000
Payments for (Proceeds from) Short-term Investments	us-gaap_PaymentsForProceedsFromShortTermInvestments	5,000,000
Payments for (Proceeds from) Short-term Investments	us-gaap_PaymentsForProceedsFromShortTermInvestments	5,000,000
Payments to Acquire Businesses Including Contingent Payments, Net of Cash Acquired	spgi_PaymentstoAcquireBusinessesIncludingContingentPaymentsNetofCashAcquired	33,000,000
Payments to Acquire Businesses Including Contingent Payments, Net of Cash Acquired	spgi_PaymentstoAcquireBusinessesIncludingContingentPaymentsNetofCashAcquired	83,000,000
Payments to Acquire Businesses Including Contingent Payments, Net of Cash Acquired	spgi_PaymentstoAcquireBusinessesIncludingContingentPaymentsNetofCashAcquired	401,000,000
Net Cash Provided by (Used in) Operating Activities	us-gaap_NetCashProvidedByUsedInOperatingActivities	2,263,000,000
Net Cash Provided by (Used in) Operating Activities	us-gaap_NetCashProvidedByUsedInOperatingActivities	3,343,000,000
Net Cash Provided by (Used in) Operating Activities	us-gaap_NetCashProvidedByUsedInOperatingActivities	2,945,000,000
Payments Related to Tax Withholding for Share-based Compensation	us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation	0
Payments Related to Tax Withholding for Share-based Compensation	us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation	0
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Increase (Decrease) in Accounts Payable and Accrued Liabilities	us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	66,000,000
Increase (Decrease) in Accounts Payable and Accrued Liabilities	us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	(44,000,000)
Increase (Decrease) in Accounts Payable and Accrued Liabilities	us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	(31,000,000)
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Net Cash Provided by (Used in) Investing Activities	us-gaap_NetCashProvidedByUsedInInvestingActivities	(122,000,000)
Net Cash Provided by (Used in) Investing Activities	us-gaap_NetCashProvidedByUsedInInvestingActivities	(416,000,000)
Increase (Decrease) in Other Current Assets	us-gaap_IncreaseDecreaseInOtherCurrentAssets	3,000,000
Increase (Decrease) in Other Current Assets	us-gaap_IncreaseDecreaseInOtherCurrentAssets	(12,000,000)
Increase (Decrease) in Other Current Assets	us-gaap_IncreaseDecreaseInOtherCurrentAssets	(5,000,000)
Share-based Compensation	us-gaap_ShareBasedCompensation	37,000,000
Share-based Compensation	us-gaap_ShareBasedCompensation	42,000,000
Share-based Compensation	us-gaap_ShareBasedCompensation	50,000,000
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Payments for Repurchase of Common Stock	us-gaap_PaymentsForRepurchaseOfCommonStock	0
Payments for Repurchase of Common Stock	us-gaap_PaymentsForRepurchaseOfCommonStock	0
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Payments of Ordinary Dividends, Common Stock	us-gaap_PaymentsOfDividendsCommonStock	0
Increase (Decrease) in Accounts Receivable	us-gaap_IncreaseDecreaseInAccountsReceivable	340,000,000
Increase (Decrease) in Accounts Receivable	us-gaap_IncreaseDecreaseInAccountsReceivable	171,000,000
Increase (Decrease) in Accounts Receivable	us-gaap_IncreaseDecreaseInAccountsReceivable	176,000,000
Payment for Contingent Consideration Liability, Investing Activities	us-gaap_PaymentForContingentConsiderationLiabilityInvestingActivities	34,000,000
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Payments to Acquire Interest in Subsidiaries and Affiliates	us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates	25,000,000
Increase (Decrease) in Accrued Liabilities	us-gaap_IncreaseDecreaseInAccruedLiabilities	50,000,000
Increase (Decrease) in Accrued Liabilities	us-gaap_IncreaseDecreaseInAccruedLiabilities	55,000,000
Increase (Decrease) in Accrued Liabilities	us-gaap_IncreaseDecreaseInAccruedLiabilities	0
Increase (Decrease) in Other Noncurrent Assets and Liabilities, Net	us-gaap_IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet	(16,000,000)
Increase (Decrease) in Other Noncurrent Assets and Liabilities, Net	us-gaap_IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet	(14,000,000)
Increase (Decrease) in Other Noncurrent Assets and Liabilities, Net	us-gaap_IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet	33,000,000
Repayments of Senior Debt	us-gaap_RepaymentsOfSeniorDebt	0
Repayments of Senior Debt	us-gaap_RepaymentsOfSeniorDebt	0
Proceeds from Stock Options Exercised	us-gaap_ProceedsFromStockOptionsExercised	2,000,000
Proceeds from Stock Options Exercised	us-gaap_ProceedsFromStockOptionsExercised	7,000,000
Proceeds from Stock Options Exercised	us-gaap_ProceedsFromStockOptionsExercised	8,000,000
Payments for Legal Settlements	us-gaap_PaymentsForLegalSettlements	42,000,000
Payments for Legal Settlements	us-gaap_PaymentsForLegalSettlements	3,000,000
Payments for Legal Settlements	us-gaap_PaymentsForLegalSettlements	108,000,000
Increase (Decrease) in Contract with Customer, Liability	us-gaap_IncreaseDecreaseInContractWithCustomerLiability	483,000,000
Increase (Decrease) in Contract with Customer, Liability	us-gaap_IncreaseDecreaseInContractWithCustomerLiability	64,000,000
Increase (Decrease) in Contract with Customer, Liability	us-gaap_IncreaseDecreaseInContractWithCustomerLiability	110,000,000
Proceeds from Sale of Property, Plant, and Equipment	us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment	76,000,000
Proceeds from Sale of Property, Plant, and Equipment	us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment	2,000,000
Proceeds from Sale of Property, Plant, and Equipment	us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment	6,000,000
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1,314,000,000
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1,681,000,000
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2,147,000,000
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1,264,000,000
Increase (Decrease) in Income Taxes Payable	us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable	33,000,000
Increase (Decrease) in Income Taxes Payable	us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable	9,000,000
Increase (Decrease) in Income Taxes Payable	us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable	(9,000,000)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	367,000,000
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	466,000,000
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	(883,000,000)
Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	(158,000,000)
Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	82,000,000
Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	(79,000,000)
Provision for Doubtful Accounts	us-gaap_ProvisionForDoubtfulAccounts	8,000,000
Provision for Doubtful Accounts	us-gaap_ProvisionForDoubtfulAccounts	11,000,000
Provision for Doubtful Accounts	us-gaap_ProvisionForDoubtfulAccounts	14,000,000
Intercompany Financing Transactions	spgi_IntercompanyFinancingTransactions	(1,600,000,000)
Intercompany Financing Transactions	spgi_IntercompanyFinancingTransactions	(2,733,000,000)
Intercompany Financing Transactions	spgi_IntercompanyFinancingTransactions	(3,162,000,000)
Payments for Previous Acquisition	us-gaap_PaymentsForPreviousAcquisition	$ 0

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Payments to Acquire Businesses Including Contingent Payments, Net of Cash Acquired

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Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

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The amount of cash paid for the settlement of litigation or for other legal issues during the period.

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The net amount paid (received) by the reporting entity through acquisition or sale and maturities of short-term investments with an original maturity that is three months or less which qualify for treatment as an investing activity based on management's intention and intended by management to be liquidated, if necessary, within the current operating cycle. Includes cash flows from securities classified as trading securities that were acquired for reasons other than sale in the short-term.

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The cash outflow to reacquire common stock during the period.

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Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.

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Amount of cash outflow in the form of ordinary dividends provided by the non-wholly owned subsidiary to noncontrolling interests.

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Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award.

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The cash outflow associated with the acquisition of or advances to an entity that is related to it but not strictly controlled (for example, an unconsolidated subsidiary, affiliate, and joint venture or equity method investment) or the acquisition of an additional interest in a subsidiary (controlled entity).

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The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets.

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The cash inflow from a borrowing with the highest claim on the assets of the entity in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle, if longer).

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The net cash inflow or outflow for borrowing having initial term of repayment within one year or the normal operating cycle, if longer.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

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Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement.

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Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable.

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The cash outflow for a long-term debt where the holder has highest claim on the entity's asset in case of bankruptcy or liquidation during the period.

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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