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Shares and Stockholders' Equity (Changes In Common stock (Number Of Shares)) (Details) - shares	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Changes In Common Stock (Number Of Shares) [Line Items]
Balance as of beginning-of-year	177,193,515
Balance as of end-of-year	171,890,974
Common stock as of End-of-Year
Basic basis	171,890,974	191,149,192
Diluted basis	173,761,296	192,464,319
Common Stock [Member]
Changes In Common Stock (Number Of Shares) [Line Items]
Balance as of beginning-of-year	177,193,515	192,329,691
Stock compensation/issued for benefit plans	514,855	711,138
Retirement/cancellation of shares	(5,817,396)	(1,891,637)
Balance as of end-of-year	171,890,974	191,149,192

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Number, after forfeiture, of shares or units issued under share-based payment arrangement. Excludes shares or units issued under employee stock ownership plan (ESOP).

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