Shares and Stockholders' Equity (Changes In Common stock (Number Of Shares)) (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Changes In Common Stock (Number Of Shares) [Line Items]
Balance as of beginning-of-year			40,000
Balance as of beginning-of-year			169,220,511
Balance as of end-of-period	40,000		40,000
Balance as of end-of-year	169,630,880		169,630,880
Common Stock [Member]
Changes In Common Stock (Number Of Shares) [Line Items]
Balance as of beginning-of-year	169,537,759	171,890,974	169,220,511	177,193,515
Stock compensation/issued for benefit plans	93,121	161,566	410,369	676,421
Retirement/cancellation of shares		(1,828,424)		(7,645,820)
Balance as of end-of-year	169,630,880	170,224,116	169,630,880	170,224,116
Common stock as of End-of-Year
Basic basis	169,630,880	170,224,116	169,630,880	170,224,116
Diluted basis	170,610,356	171,556,357	170,610,356	171,556,357