v3.26.1
Earnings Per Share (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Amounts attributable to S&P Global Inc. common shareholders:    
Net income $ 1,395 $ 1,090
Basic weighted-average number of common shares outstanding (shares) 297,300,000 307,300,000
Effect of dilutive securities (shares) 300,000 400,000
Diluted weighted-average number of common shares outstanding (shares) 297,600,000 307,700,000
Net income:    
Basic (USD per share) $ 4.69 $ 3.55
Diluted (USD per share) $ 4.69 $ 3.54
Stock Options    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive shares excluded from computation of diluted earnings (shares) 0 0
Restricted Stock and Unit Awards    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive shares excluded from computation of diluted earnings (shares) 500,000 700,000