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Acquisitions and Divestitures - Merger with IHS Markit (Details) $ / shares in Units, $ in Millions | Feb. 28, 2022 USD ($) $ / shares shares
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Business Acquisition [Line Items] |
Closing price per share of S&P Global common stock (USD per share) | $ / shares | $ 380.89
IHS Markit Ltd |
Business Acquisition [Line Items] |
Exchange ratio | 28.38%
Number of S&P Global common stock transferred to IHS Markit stockholders (shares) | 113,800,453
Fair value of the consideration transferred for IHS Markit | $ | $ 43,536
IHS Markit Ltd | Common Stock |
Business Acquisition [Line Items] |
Fair value of the consideration transferred for IHS Markit | $ | $ 43,345
IHS Markit Ltd | Replacement Equity Awards |
Business Acquisition [Line Items] |
Number of S&P Global common stock transferred to IHS Markit stockholders (shares) | 900,000
Fair value of the consideration transferred for IHS Markit | $ | $ 191
IHS Markit Ltd |
Business Acquisition [Line Items] |
Number of shares IHS Markit issued and outstanding (in shares) | 400,988,207
IHS Markit Ltd | IHS Markit Ltd | Trust for Benefit of Employees |
Business Acquisition [Line Items] |
Number of shares IHS Markit issued and outstanding (in shares) | 25,219,470

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