Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 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 March 31
(Millions of shares)	2020	2019
Basic	341.4	344.3
Dilutive effect of stock options and restricted share unit awards	2.7	1.7
Diluted	344.1	346.0