Earnings Per Share (EPS) (Tables)

6 Months Ended

Jun. 30, 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 and six months ended June 30:

	Three months ended		Six months ended
In millions	2013	2012	2013	2012
Weighted-average number of basic shares	297.5	309.2	298.1	304.2
Shares issuable under incentive stock plans	3.7	3.5	3.8	3.2
Exchangeable Senior Notes	—	1.7	—	6.1
Weighted-average number of diluted shares	301.2	314.4	301.9	313.5
Anti-dilutive shares	1.1	5.8	1.4	6.4