Earnings per Share (Tables)

12 Months Ended

Dec. 31, 2020

Earnings Per Share [Abstract]

Schedule of Calculation for Basic and Diluted Earnings per Share

The calculation for basic and diluted EPS is as follows:

(in millions, except per share data)	Year Ended December 31,
	2020		2019		2018
Amount attributable to S&P Global Inc. common shareholders:
Net income	$	2,339	$	2,123	$	1,958
Basic weighted-average number of common shares outstanding	241.0		245.4		250.9
Effect of stock options and other dilutive securities	1.1		1.5		2.3
Diluted weighted-average number of common shares outstanding	242.1		246.9		253.2
Earnings per share attributable to S&P Global Inc. common shareholders:
Net income:
Basic	$	9.71	$	8.65	$	7.80
Diluted	$	9.66	$	8.60	$	7.73