Earnings Per Share

3 Months Ended

Mar. 31, 2021

Earnings Per Share [Abstract]

Earnings Per Share

Earnings per share

Basic earnings per share has been calculated using Net income for the period divided by the weighted-average number of shares outstanding during the period. The number of shares used in the earnings per share calculations are reconciled as follows:

	For the three months ended March 31
(in millions)	2021	2020
Weighted-average basic shares outstanding	133.3	136.7
Dilutive effect of stock options	0.6	0.5
Weighted-average diluted shares outstanding	133.9	137.2

For the three months ended March 31, 2021, there were no options excluded from the computation of diluted earnings per share (three months ended March 31, 2020 - 0.1 million).