Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2020

Earnings Per Share [Abstract]

Average Common Shares Outstanding Basic and Diluted

The average number of common shares outstanding is reconciled to those used in the basic and diluted EPS computations as follows:

	Three Months Ended September 30		Nine Months Ended September 30
(Millions of shares)	2020	2019	2020	2019
Basic	341.0	343.8	341.1	344.1
Dilutive effect of stock options and restricted share unit awards	1.3	2.1	1.2	1.9
Diluted	342.3	345.9	342.3	346.0