Earnings Attributable to Ecolab Per Common Share

3 Months Ended

Mar. 31, 2012

Earnings Attributable to Ecolab Per Common Share

Earnings Attributable to Ecolab Per Common Share

10.Earnings Attributable to Ecolab Per Common Share

The computations of the basic and diluted earnings attributable to Ecolab per share amounts were as follows:

	First Quarter Ended
	March 31
(millions, except per share)	2012		2011
Net income attributable to Ecolab	$	49.7	$	93.6
Weighted-average common shares outstanding
Basic	291.5		232.0
Effect of dilutive stock options, units and awards	6.4		3.9
Diluted	297.9		235.9
Earnings attributable to Ecolab per common share
Basic	$	0.17	$	0.40
Diluted	$	0.17	$	0.40
Anti-dilutive securities excluded from computation of earnings per share	3.3		4.7