Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2018

Earnings Per Share [Abstract]

Schedule of Calculation for Basic and Diluted Earnings Per Share

The calculation for basic and diluted EPS for the three months ended March 31 is as follows:

(in millions, except per share amounts)	2018		2017
Amounts attributable to S&P Global Inc. common shareholders:
Net income	$	491	$	399
Basic weighted-average number of common shares outstanding	252.4		258.2
Effect of stock options and other dilutive securities	2.0		2.6
Diluted weighted-average number of common shares outstanding	254.4		260.8
Earnings per share attributable to S&P Global Inc. common shareholders:
Net income:
Basic	$	1.94	$	1.54
Diluted	$	1.93	$	1.53