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Earnings Per Share (Tables)
3 Months Ended
Mar. 31, 2019
Earnings Per Share [Abstract]  
Computation of diluted EPS
Computation of Diluted EPS
 
Three Months Ended March 31
 
2019
 
2018
(in millions, except per share data)
Net Income
Attributable to
Comcast
Corporation
 
Shares
 
Per Share
Amount
 
Net Income
Attributable to
Comcast
Corporation
 
Shares
 
Per Share
Amount
Basic EPS attributable to Comcast Corporation shareholders
$
3,553

 
4,534

 
$
0.78

 
$
3,118

 
4,633

 
$
0.67

Effect of dilutive securities:
 
 
 
 
 
 
 
 
 
 
 
Assumed exercise or issuance of shares relating to stock plans
 
 
60

 
 
 
 
 
72

 
 
Diluted EPS attributable to Comcast Corporation shareholders
$
3,553

 
4,594

 
$
0.77

 
$
3,118

 
4,705

 
$
0.66