Earnings Per Share (EPS)

12 Months Ended

Dec. 31, 2011

Earnings Per Share [Abstract]

Earnings Per Share (EPS)

EARNINGS PER SHARE (EPS)

Basic EPS is calculated by dividing Net earnings attributable to Ingersoll-Rand plc 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:

In millions	2011	2010	2009
Weighted-average number of basic shares	324.8	324.7	321.1
Shares issuable under incentive stock plans	3.8	5.1	2.9
Exchangeable Senior Notes	10.7	10.0	5.1
Weighted-average number of diluted shares	339.3	339.8	329.1
Anti-dilutive shares	5.0	12.4	17.6