Earnings Per Share (EPS) (Tables)

9 Months Ended

Sep. 30, 2017

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 nine months ended September 30:

	Three months ended		Nine months ended
In millions	2017	2016	2017	2016
Weighted-average number of basic shares	253.3	259.2	256.4	259.0
Shares issuable under incentive stock plans	3.4	2.6	3.3	2.4
Weighted-average number of diluted shares	256.7	261.8	259.7	261.4
Anti-dilutive shares	1.0	1.2	1.6	1.3