Share Owners' Equity -Authorization of Common Stock (Details) - $ / shares	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020
Authorization of common stock
Shares of common stock issued (including treasury shares)	250,000,000	250,000,000	250,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01	$ 0.01
Shares of common stock issued (including treasury shares)	188,426,000	189,305,000	189,302,000
Treasury shares	31,599,000	31,911,000	32,136,000

No definition available.

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- Definition

Face amount or stated value per share of common stock.

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+ Details

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- Definition

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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+ Details

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- Definition

Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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- Definition

Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29,30)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655

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