Earnings (Loss) Per Share

12 Months Ended

Dec. 31, 2013

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	2013		2012			2011
Net income (loss) attributable to Pentair Ltd.	$	536.8	$	(107.2	)	$	(7.5	)
Weighted average common shares outstanding
Basic	201.1		127.4			98.2
Dilutive impact of stock options and restricted stock awards	3.5		—			—
Diluted	204.6		127.4			98.2
Earnings (loss) per common share attributable to Pentair Ltd.
Basic earnings (loss) per common share	$	2.67	$	(0.84	)	$	(0.08	)
Diluted earnings (loss) per common share	$	2.62	$	(0.84	)	$	(0.08	)
Anti-dilutive stock options excluded from the calculation of diluted earnings per share	0.2		16.0			8.4