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Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2021

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)						2021						2020						2021						2020
Basic						336.8						341.0						337.4						341.1
Dilutive effect of stock options and restricted share unit awards						0.7						1.3						1.0						1.2
Diluted						337.5						342.3						338.4						342.3

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