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Earnings Per Common Share (Tables)
 9 Months Ended
Sep. 30, 2017
Earnings Per Share [Abstract]  
Reconciliation of the numerators and denominators of 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 nine and three months ended September 30, 2017 and 2016 (in millions, except per share amounts):
 
Nine Months Ended 
 September 30,
 
Three Months Ended September 30,
2017
 
2016
 
2017
 
2016
Basic:
 
 
 
 
 
 
 
Net income attributable to Intercontinental Exchange, Inc.
$
1,289

 
$
1,070

 
$
369

 
$
344

Weighted average common shares outstanding
591

 
595

 
588

 
596

Basic earnings per common share
$
2.18

 
$
1.80

 
$
0.63

 
$
0.58

Diluted:
 
 
 
 
 
 
 
Weighted average common shares outstanding
591

 
595

 
588

 
596

Effect of dilutive securities - stock options and restricted shares
4

 
4

 
4

 
4

Diluted weighted average common shares outstanding
595

 
599

 
592

 
600

Diluted earnings per common share
$
2.17

 
$
1.79

 
$
0.62

 
$
0.57