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Shares and Stockholders' Equity (Changes In Common stock (Number Of Shares)) (Details) - shares | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Changes In Common Stock (Number Of Shares) [Line Items] |  |  |
Balance as of end-of-period | 40,000 |  |
Balance as of beginning-of-year | 177,193,515 |  |
Balance as of end-of-year | 169,220,511 | 177,193,515 |
Common Stock [Member] |  |  |
Changes In Common Stock (Number Of Shares) [Line Items] |  |  |
Balance as of beginning-of-year | 177,193,515 | 192,329,691 | 196,668,532
Stock compensation/issued for benefit plans | 692,491 | 1,106,572 | 547,209
Retirement/cancellation of shares | (8,665,495) | (16,242,748) | (4,886,050)
Balance as of end-of-year | 169,220,511 | 177,193,515 | 192,329,691
Common stock as of End-of-Year |  |  |
Basic basis | 169,220,511 | 177,193,515 | 192,329,691
Diluted basis | 170,483,323 | 179,229,110 | 193,672,296

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