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Earnings Per Share
 9 Months Ended
Sep. 30, 2016
Earnings Per Share [Abstract]  
Earnings Per Share
The following table shows a reconciliation of the numerators and denominators used in calculating basic and diluted earnings per share.
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
(In millions, except per share amounts)
2016
 
2015
 
2016
 
2015
Numerators
 
 
 
 
 
 
 
Income from continuing operations attributable to W. R. Grace & Co. shareholders
$
41.2

 
$
33.7

 
$
89.7

 
$
96.5

(Loss) income from discontinued operations, net of income taxes
(1.6
)
 
(19.9
)
 
(10.9
)
 
27.4

Net income attributable to W. R. Grace & Co. shareholders
$
39.6

 
$
13.8

 
$
78.8

 
$
123.9

Denominators
 
 
 
 
 
 
 
Weighted average common shares—basic calculation
70.3

 
72.1

 
70.5

 
72.5

Dilutive effect of employee stock options
0.4

 
0.6

 
0.4

 
0.6

Weighted average common shares—diluted calculation
70.7

 
72.7

 
70.9

 
73.1

Basic earnings per share attributable to W. R. Grace & Co. shareholders
 
 
 
 
 
 
 
Income from continuing operations
$
0.59

 
$
0.47

 
$
1.27

 
$
1.33

(Loss) income from discontinued operations, net of income taxes
(0.03
)
 
(0.28
)
 
(0.15
)
 
0.38

Net income
$
0.56

 
$
0.19

 
$
1.12

 
$
1.71

Diluted earnings per share attributable to W. R. Grace & Co. shareholders
 
 
 
 
 
 
 
Income from continuing operations
$
0.58

 
$
0.46

 
$
1.27

 
$
1.32

(Loss) income from discontinued operations, net of income taxes
(0.02
)
 
(0.27
)
 
(0.16
)
 
0.37

Net income
$
0.56

 
$
0.19

 
$
1.11

 
$
1.69


There were 1.0 million anti-dilutive options outstanding for the three and nine months ended September 30, 2016, compared with 0.6 million and 0.4 million for the corresponding prior-year periods.
On January 15, 2015, the Company completed an initial $500 million share repurchase program. On February 5, 2015, Grace's Board of Directors authorized an additional share repurchase program of up to $500 million. The timing of the repurchases and the actual amount repurchased will depend on a variety of factors, including the market price of the Company's shares, the strategic deployment of capital, and general market and economic conditions. During the nine months ended September 30, 2016 and 2015, the Company repurchased 737,922 shares and 2,263,121 shares of Company common stock for $55.1 million and $220.1 million, respectively, pursuant to the terms of the share repurchase programs.