Earnings and Dividends per Share (Reconciliation Of Denominator For Basic And Diluted Earnings (Loss) Per Share) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings and Dividends Per Share [Abstract]
Weighted average common shares—basic	128,002,911	127,850,592	128,395,184
Weighted Average Number Diluted Shares Outstanding Adjustment	695,071	238,466	362,109
Weighted average common shares—diluted	128,697,982	128,089,058	128,757,293
Basic (in dollars per share)	$ 15.66	$ 2.57	$ 3.26
Diluted (in dollars per share)	$ 15.58	$ 2.56	$ 3.25