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Capital Stock (Tables)

12 Months Ended

Dec. 31, 2019

Stockholders Equity Note [Abstract]

Schedule of Common Stock Outstanding

Common stock outstanding as of December 31, 2019, 2018 and 2017 was as follows:

(Number of shares in millions)		2019				2018				2017
Common stock:
Balance, beginning of year		108.5				107.8					106.7
Activity under stock plans		0.8				0.7				1.1
Balance, end of year		109.3				108.5					107.8
Treasury stock:
Balance, beginning of year		23.7				18.2				15.3
Repurchased			2.0				5.5			2.9
Balance, end of year		25.7				23.7				18.2
Common stock outstanding		83.6				84.8				89.6

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- Definition

Tabular disclosure of an entity's capital units or capital shares, including the value of capital units or capital shares, units authorized, units outstanding and other information necessary to a fair presentation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-04.16)
-URI http://asc.fasb.org/extlink&oid=6488278&loc=d3e603758-122996

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- References

No definition available.

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