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Capital Stock (Tables)

12 Months Ended

Dec. 31, 2020

Equity [Abstract]

Common Stock and Treasury Stock Activity

The number of shares of common stock and treasury stock and the share activity for 2020 and 2019 were as follows:

		Common Shares										Treasury Shares
		2020					2019					2020					2019
Balance at the beginning of the year			139,555,487					140,498,981					42,335,315					40,110,623
Stock plan shares issued			2,175,510					1,281,198					—					—
Shares surrendered by optionees			(159,089	)				(185,141	)				159,089					185,141
Common stock repurchases			(2,911,754	)				(2,039,551	)				2,911,754					2,039,551
Balance at the end of the year			138,660,154					139,555,487					45,406,158					42,335,315

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- References

No definition available.

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- Definition

Tabular disclosure of changes in the separate accounts comprising stockholders' equity (in addition to retained earnings) and of the changes in the number of shares of equity securities during at least the most recent annual fiscal period and any subsequent interim period presented is required to make the financial statements sufficiently informative if both financial position and results of operations are presented.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644

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