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Earnings Per Common Share (Tables)
 12 Months Ended
Dec. 31, 2017
Earnings Per Share [Abstract]  
Reconciliation of the Numerators and Denominators of the Basic and Diluted 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, 2017, 2016 and 2015 (in millions, except per share amounts):
 
Year Ended December 31,
2017
 
2016
 
2015
Basic:
 
 
 
 
 
Net income attributable to Intercontinental Exchange, Inc.
$
2,514

 
$
1,422

 
$
1,274

Weighted average common shares outstanding
589

 
595

 
556

Basic earnings per common share
$
4.27

 
$
2.39

 
$
2.29

Diluted:
 
 
 
 
 
Weighted average common shares outstanding
589

 
595

 
556

Effect of dilutive securities - stock options and restricted stock
5

 
4

 
3

Diluted weighted average common shares outstanding
594

 
599

 
559

Diluted earnings per common share
$
4.23

 
$
2.37

 
$
2.28