Earnings and Dividends per Share (Reconciliation Of Denominator For Basic And Diluted Earnings (Loss) Per Share) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Earnings and Dividends Per Share [Abstract]
Weighted average common shares—basic	127,970,445	128,002,911	127,850,592
Assumed exercise of options and vesting of performance stock units	875,117	695,071	238,466
Weighted average common shares—diluted	128,845,562	128,697,982	128,089,058
Basic (in dollars per share)	$ 17.46	$ 15.66	$ 2.57
Diluted (in dollars per share)	$ 17.34	$ 15.58	$ 2.56