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Earnings Per Share
 6 Months Ended
Jun. 30, 2013
Earnings Per Share [Abstract]  
Earnings Per Share
Earnings Per Share
The following table presents the calculation of Dominion’s basic and diluted EPS:
 
Three Months Ended June 30,
Six Months Ended June 30,
 
2013
2012
2013
2012
(millions, except EPS)
 
Net income attributable to Dominion
$
202

$
258

$
697

$
752

Average shares of common stock outstanding – Basic
578.1

572.0

577.3

571.3

Net effect of dilutive securities(1)
0.8

1.1

0.9

1.2

Average shares of common stock outstanding – Diluted
578.9

573.1

578.2

572.5

Earnings Per Common Share – Basic
$
0.35

$
0.45

$
1.21

$
1.32

Earnings Per Common Share – Diluted
$
0.35

$
0.45

$
1.21

$
1.31

(1)
Dilutive securities consist primarily of contingently convertible senior notes. See Note 14 in this report for more information.

Dominion's 2013 Series A Equity Units and 2013 Series B Equity Units issued in June 2013 are potentially dilutive securities but were excluded from the calculation of diluted EPS for the three and six months ended June 30, 2013.  See Note 14 in this report for more information. There were no potentially dilutive securities excluded from the calculation of diluted EPS for the three and six months ended June 30, 2012.