Earnings Per Common Share

12 Months Ended

Dec. 31, 2013

Earnings Per Share [Abstract]

Earnings Per Common Share

Earnings Per Common Share

The following is a reconciliation of the numerators and denominators of the basic and diluted earnings per common share computations for the years ended December 31, 2013, 2012 and 2011 (in millions, except per share amounts):

	Year Ended December 31,
	2013		2012		2011
Basic:
Net income attributable to IntercontinentalExchange Group,  Inc.	$	254	$	552	$	510
Weighted average common shares outstanding	78		73		73
Basic earnings per common share	$	3.24	$	7.59	$	6.97
Diluted:
Weighted average common shares outstanding	78		73		73
Effect of dilutive securities:
Stock options and restricted stock	1		—		1
Diluted weighted average common shares outstanding	79		73		74
Diluted earnings per common share	$	3.21	$	7.52	$	6.90

Basic earnings per common share is calculated using the weighted average common shares outstanding during the period. The weighted average common shares outstanding during the year ended December 31, 2013 increased primarily due to the 42.4 million shares of the Company's common stock issued to NYSE Euronext stockholders in connection with the acquisition, weighted to show these additional shares outstanding for the period from November 13, 2013 to December 31, 2013. Common equivalent shares from stock options and restricted stock awards, using the treasury stock method, are also included in the diluted per share calculations unless the effect of their inclusion would be antidilutive. During the years ended December 31, 2012 and 2011, 228,000 and 242,000 outstanding stock options, respectively, were not included in the computation of diluted earnings per common share, because to do so would have had an antidilutive effect because the outstanding stock option exercise prices were greater than the average market price of the common shares during the relevant periods. There were no outstanding stock options for the year ended December 31, 2013 with an antidilutive effect. As of December 31, 2013 and 2012, there were 22,000 and 20,000 restricted stock units, respectively, that were vested but have not been issued that are included in the computation of basic and diluted earnings per share.