Shares and Stockholders' Equity (Changes In Common stock (Number Of Shares)) (Details) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Changes In Common Stock (Number Of Shares) [Line Items]
Balance as of beginning-of-year	192,329,691
Balance as of end-of-year	177,193,515	192,329,691
Common Stock [Member]
Changes In Common Stock (Number Of Shares) [Line Items]
Balance as of beginning-of-year	192,329,691	196,668,532	205,862,760
Stock issued for exercise of warrants			258,633
Stock compensation/issued for benefit plans	1,106,572	547,209	942,318
Retirement/cancellation of shares	(16,242,748)	(4,886,050)	(10,395,179)
Balance as of end-of-year	177,193,515	192,329,691	196,668,532
Common stock as of End-of-Year
Basic basis	177,193,515	192,329,691	196,668,532
Diluted basis	179,229,110	193,672,296	199,196,043