Earnings per Ordinary Share

Basic earnings per ordinary share is computed by dividing net earnings by the weighted average number of ordinary shares outstanding during the period. Diluted earnings per ordinary share is computed by dividing net earnings by the weighted average number of ordinary shares outstanding during the period increased by the number of additional shares that would have been outstanding related to potentially dilutive securities or instruments, if the impact is dilutive.

Basic and diluted earnings per ordinary share are calculated as follows:



	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(In millions, except per share amounts)	2018		2017		2018		2017
Basic earnings (numerator):
Net earnings	$	176.7	$	88.3	$	301.3	$	451.7
Shares (denominator):
Weighted average ordinary shares outstanding	514.5		535.2		514.4		534.9
Basic earnings per ordinary share	$	0.34	$	0.17	$	0.59	$	0.84

Diluted earnings (numerator):
Net earnings	$	176.7	$	88.3	$	301.3	$	451.7
Shares (denominator):
Weighted average ordinary shares outstanding	514.5		535.2		514.4		534.9
Share-based awards	2.0		1.8		2.1		2.1
Total dilutive shares outstanding	516.5		537.0		516.5		537.0
Diluted earnings per ordinary share	$	0.34	$	0.16	$	0.58	$	0.84

Additional stock awards and restricted stock awards were outstanding during the three and nine months ended September 30, 2018 and 2017, but were not included in the computation of diluted earnings per ordinary share for each respective period because the effect would be anti-dilutive. Excluded shares at September 30, 2018 include certain share-based compensation awards and restricted ordinary shares whose performance conditions had not been fully met. Such excluded shares and anti-dilutive awards represented 9.3 million shares and 8.9 million shares for the three and nine months ended September 30, 2018, respectively and 8.9 million shares and 8.6 million shares for the three and nine months ended September 30, 2017, respectively.