Earnings Per Share

9 Months Ended

Sep. 30, 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 September 30		For the nine months ended September 30
(in millions)	2021	2020	2021	2020
Weighted-average basic shares outstanding	666.9	676.2	666.7	679.3
Dilutive effect of stock options	2.9	2.8	3.1	2.5
Weighted-average diluted shares outstanding	669.8	679.0	669.8	681.8

For the three and nine months ended September 30, 2021, there were 0.2 million and 0.1 million options, respectively, excluded from the computation of diluted earnings per share because their effects were not dilutive (three and nine months ended September 30, 2020 - nil and 0.6 million, respectively).