Earnings Per Share

3 Months Ended

Mar. 31, 2020

Basic and diluted earnings per share were calculated as follows:


	Three months ended
In millions, except per-share data	March 31, 2020		March 31, 2019
Net income	$	18.6	$	56.4
Weighted average ordinary shares outstanding
Basic	169.8		176.5
Dilutive impact of stock options, restricted stock units and performance share units	1.2		1.7
Diluted	171.0		178.2
Earnings per ordinary share



Basic earnings per ordinary share	$	0.11	$	0.32



Diluted earnings per ordinary share	$	0.11	$	0.32
Anti-dilutive stock options excluded from the calculation of diluted earnings per share	2.9		1.9