Shares And Stockholders' Equity (Schedule Of Common Stock Outstanding) (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 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	169,658,271		169,658,271
Common Stock [Member]
Changes In Common Stock (Number Of Shares) [Line Items]
Balance as of beginning-of-year	169,630,880	170,224,116	169,220,511	177,193,515
Stock compensation/issued for benefit plans	27,391	10,052	437,760	686,473
Retirement/cancellation of shares		(1,019,675)		(8,665,495)
Balance as of end-of-year	169,658,271	169,214,493	169,658,271	169,214,493
Common stock as of End-of-Year
Basic basis	169,658,271	169,214,493	169,658,271	169,214,493
Diluted basis	171,033,121	170,658,861	171,033,121	170,658,861