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Equity (Common Stock Changes in Number of Shares Issued, Held in Treasury and Outstanding) (Details) - shares | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Balance, beginning (in shares) | 666,305,189 |  |
Balance, ending (in shares) | 666,305,189 | 666,305,189 |
Issued |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Balance, beginning (in shares) | 666,300,000 | 666,300,000 | 666,300,000
Common Stock issued (in shares) | 0.0 | 0.0 | 0.0
Common Stock acquired | (0.0) | (0.0) | (0.0)
Stock-based compensation programs (in shares) | (0.0) | (0.0) | (0.0)
Balance, ending (in shares) | 666,300,000 | 666,300,000 | 666,300,000
Held In Treasury |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Balance, beginning (in shares) | 300,300,000 | 290,000,000.0 | 269,900,000
Common Stock issued (in shares) | 0.0 | 0.0 | 0.0
Common Stock acquired | 10,900,000 | 14,500,000 | 24,500,000
Stock-based compensation programs (in shares) | (4,100,000) | (4,200,000) | (4,400,000)
Balance, ending (in shares) | 307,100,000 | 300,300,000 | 290,000,000.0
Outstanding |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Balance, beginning (in shares) | 366,000,000.0 | 376,300,000 | 396,400,000
Common Stock issued (in shares) | 0.0 | 0.0 | 0.0
Common Stock acquired | 10,900,000 | 14,500,000 | 24,500,000
Stock-based compensation programs (in shares) | 4,100,000 | 4,200,000 | 4,400,000
Balance, ending (in shares) | 359,200,000 | 366,000,000.0 | 376,300,000

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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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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