Earnings Per Share

6 Months Ended

Jun. 30, 2022

Our basic earnings per share calculations are based on the weighted average number of common shares outstanding during the period. Potentially dilutive securities include outstanding stock options, restricted share units, deferred stock units and performance-based restricted share units. The effect of potentially dilutive securities is reflected in diluted earnings per common share by application of the treasury method. Diluted earnings per share gives effect to all potentially dilutive common shares outstanding during the period.


	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in millions, except per share data)	2022		2021		2022		2021


Net income attributable to common shareholders	$	258.2	$	138.3	$	363.2	$	246.7

Average basic shares outstanding	56.1		58.5		56.7		58.4
Effect of dilutive share-based awards	0.8		0.8		0.8		0.7
Average diluted shares outstanding	56.9		59.3		57.5		59.1




Earnings per basic share	$	4.60	$	2.36	$	6.41	$	4.22




Earnings per diluted share	$	4.54	$	2.33	$	6.32	$	4.17

The computation of diluted earnings per share excludes the effect of the potentially anti-dilutive securities which was 0.4 million and 1.3 million for the three months ended June 30, 2022, and 2021, respectively and 0.3 million and 1.5 million for the six months ending June 30, 2022 and 2021