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Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2021

Earnings Per Share

Common Share Data Used for Computing Basic and Diluted Earnings Per Share

Basic and diluted earnings per share were computed using the following common share data for the year ended December 31 (shares in millions):

​	​	​	​	​	​	​
​		2021		2020		2019
Number of common shares outstanding at end of period		416.1	​	422.8		424.3
Effect of using weighted average common shares outstanding		4.3	​	0.2		0.3
Weighted average basic common shares outstanding		420.4	​	423.0		424.6
Dilutive effect of equity-based compensation awards and other contingently issuable shares		2.5	​	2.1		2.9
Weighted average diluted common shares outstanding		422.9	​	425.1		427.5
Potentially issuable shares		5.7	​	6.1		6.7
Number of anti-dilutive potentially issuable shares excluded from diluted common shares outstanding		0.6	​	1.6		0.7

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- References

No definition available.

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- Definition

Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

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