Earnings Per Share (EPS) (Tables)

3 Months Ended

Mar. 31, 2013

Earnings Per Share [Abstract]

Schedule of Earnings Per Share Basic and Diluted Shares

The following table summarizes the weighted-average number of ordinary shares outstanding for basic and diluted earnings per share calculations for the three months ended March 31:

In millions	2013	2012
Weighted-average number of basic shares	298.9	299.2
Shares issuable under incentive stock plans	3.6	2.9
Exchangeable Senior Notes	—	10.3
Weighted-average number of diluted shares	302.5	312.4
Anti-dilutive shares	1.6	12.4