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Shares and Stockholders' Equity (Changes In Common stock (Number Of Shares)) (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Changes In Common Stock (Number Of Shares) [Line Items]
Balance as of beginning-of-year			192,329,691
Balance as of end-of-year	186,089,222		186,089,222
Common stock as of End-of-Year
Basic basis	186,089,222	193,254,948	186,089,222	193,254,948
Diluted basis	188,103,623	195,331,049	188,103,623	195,331,049
Common Stock [Member]
Changes In Common Stock (Number Of Shares) [Line Items]
Balance as of beginning-of-year	189,089,948	193,247,103	192,329,691	196,668,532
Stock compensation/issued for benefit plans	61,099	7,845	943,925	396,340
Retirement/cancellation of shares	(3,061,825)		(7,184,394)	(3,809,924)
Balance as of end-of-year	186,089,222	193,254,948	186,089,222	193,254,948

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Number of shares of common stock issued on a basic basis as of the balance sheet date.

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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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