Earnings per share

9 Months Ended

Sep. 30, 2023

Earnings Per Share [Abstract]

Earnings per share

Earnings per share

	For the three months ended September 30				For the nine months ended September 30
(in millions, except per share data)	2023		2022		2023		2022
Net income attributable to controlling shareholders	$	780	$	891	$	2,904	$	2,246
Weighted-average basic shares outstanding	931.5		930.0		931.1		929.9
Dilutive effect of stock options	2.4		2.9		2.6		2.9
Weighted-average diluted shares outstanding	933.9		932.9		933.7		932.8
Earnings per share - basic	$	0.84	$	0.96	$	3.12	$	2.42
Earnings per share - diluted	$	0.84	$	0.96	$	3.11	$	2.41

For the three and nine months ended September 30, 2023, there were 0.3 million and 0.3 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, 2022 - nil and 0.3 million, respectively).