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Statements Of Condensed Consolidated Financial Position (Parenthetical) - $ / shares | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Class of Stock [Line Items] |  |
Preferred stock, par value | $ 0 | $ 0
Common Stock, Par or Stated Value Per Share | $ 0.125 | $ 0.125
Common shares, authorized (in shares) | 600,000,000 | 600,000,000
Common shares, issued (in shares) | 301,886,794 | 301,886,794
Common shares, outstanding | 270,075,445 | 292,611,569
Common shares in treasury | 31,811,349 | 9,275,225
Preferred Class A [Member] |  |
Class of Stock [Line Items] |  |
Preferred stock, shares authorized (in shares) | 3,000,000 | 3,000,000
Preferred Class B [Member] |  |
Class of Stock [Line Items] |  |
Preferred stock, shares authorized (in shares) | 4,000,000 | 4,000,000

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