Earnings per Share (Tables)

12 Months Ended

Dec. 31, 2018

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,
	2018		2017		2016
Amount attributable to S&P Global Inc. common shareholders:
Net income	$	1,958	$	1,496	$	2,106
Basic weighted-average number of common shares outstanding	250.9		256.3		262.8
Effect of stock options and other dilutive securities	2.3		2.6		2.4
Diluted weighted-average number of common shares outstanding	253.2		258.9		265.2
Earnings per share attributable to S&P Global Inc. common shareholders:
Net income:
Basic	$	7.80	$	5.84	$	8.02
Diluted	$	7.73	$	5.78	$	7.94