Earnings Per Share (EPS)

9 Months Ended

Sep. 30, 2011

Basic EPS is calculated by dividing Net earnings (loss) attributable to IR-Ireland by the weighted-average number of ordinary shares outstanding for the applicable period. Diluted EPS is calculated after adjusting the denominator of the basic EPS calculation for the effect of all potentially dilutive ordinary shares, which in the Company’s case, includes shares issuable under share-based compensation plans and the effects of the Exchangeable Senior Notes issued in April 2009. The following table summarizes the weighted-average number of ordinary shares outstanding for basic and diluted earnings per share calculations for the three and nine months ended September 30:



	Three months ended		Nine months ended
In millions	2011	2010	2011	2010
Weighted-average number of basic shares	327.7	324.7	331.0	323.7
Shares issuable under incentive stock plans	2.9	4.9	4.7	4.9
Exchangeable Senior Notes	9.6	9.4	11.4	9.6
Weighted-average number of diluted shares	340.2	339.0	347.1	338.2
Anti-dilutive shares	10.6	13.9	3.0	13.9