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Earnings Per Share (EPS) (Tables)
 12 Months Ended
Dec. 31, 2019
Earnings Per Share [Abstract]  
Weighted-Average Number of Ordinary Shares Outstanding for Basic and Diluted Earnings Per Share Calculations The following table summarizes the weighted-average number of ordinary shares outstanding for basic and diluted earnings per share calculations:
In millions
 
2019
 
2018
 
2017
Weighted-average number of basic shares outstanding
 
241.6

 
247.2

 
254.9

Shares issuable under incentive stock plans
 
2.8

 
2.9

 
3.2

Weighted-average number of diluted shares outstanding
 
244.4

 
250.1

 
258.1

Anti-dilutive shares
 
—

 
1.5

 
1.6

 
 
 
 
 
 
 
Dividends declared per ordinary share
 
2.12

 
1.96

 
1.70