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Earnings (Loss) Per Share
 12 Months Ended
Dec. 31, 2014
Earnings (Loss) Per Share
Earnings (Loss) Per Share
Basic and diluted earnings (loss) per share were calculated as follows:
 
Years ended December 31
In millions, except per share data
2014
2013
2012
Net income (loss) attributable to Pentair plc
$
214.9

$
536.8

$
(107.2
)
Net income (loss) from continuing operations attributable to Pentair plc
$
607.0

$
511.7

$
(81.5
)
Weighted average ordinary shares outstanding
 
 
 
Basic
190.6

201.1

127.4

Dilutive impact of stock options and restricted stock awards
3.1

3.5

—

Diluted
193.7

204.6

127.4

Earnings (loss) per ordinary share attributable to Pentair plc
 
 
 
Basic
 
 
 
Continuing operations
$
3.19

$
2.54

$
(0.64
)
Discontinued operations
(2.06
)
0.13

(0.20
)
Basic earnings (loss) per ordinary share attributable to Pentair plc
$
1.13

$
2.67

$
(0.84
)
Diluted
 
 
 
Continuing operations
$
3.14

$
2.50

$
(0.64
)
Discontinued operations
(2.03
)
0.12

(0.20
)
Diluted earnings (loss) per ordinary share attributable to Pentair plc
$
1.11

$
2.62

$
(0.84
)
Anti-dilutive stock options excluded from the calculation of diluted earnings per share
0.5

0.2

16.0