Shares and Stockholders' Equity (Changes In Common stock (Number Of Shares)) (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 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	170,224,116		170,224,116
Common stock as of End-of-Year
Basic basis	170,224,116	189,089,948	170,224,116	189,089,948
Diluted basis	171,556,357	191,389,750	171,556,357	191,389,750
Common Stock [Member]
Changes In Common Stock (Number Of Shares) [Line Items]
Balance as of beginning-of-year	171,890,974	191,149,192	177,193,515	192,329,691
Stock compensation/issued for benefit plans	161,566	171,688	676,421	882,826
Retirement/cancellation of shares	(1,828,424)	(2,230,932)	(7,645,820)	(4,122,569)
Balance as of end-of-year	170,224,116	189,089,948	170,224,116	189,089,948