Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2020

Earnings Per Share [Abstract]

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

Anti-dilutive stock awards were as follows for the periods presented:

	Quarter Ended June 30,		Six Months Ended June 30,
(in thousands)	2020	2019	2020	2019
Stock awards	75	55	76	55
Total	75	55	76	55

Basic And Diluted Earnings Per Share

The following table presents the earnings per share calculation for the periods presented:

	Quarter Ended June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
Net Income Attributable to CME Group (in millions)	$	503.3	$	513.8	$	1,269.5	$	1,010.7
Weighted Average Number of Common Shares (in thousands):
Basic	357,691		357,060		357,607		356,973
Effect of stock options, restricted stock and performance shares	766		1,095		846		1,130
Diluted	358,457		358,155		358,453		358,103
Earnings per Common Share Attributable to CME Group:
Basic	$	1.41	$	1.44	$	3.55	$	2.83
Diluted	1.40		1.43		3.54		2.82