Stock-Based Compensation (Summary Of PSU Transactions) (Details) - $ / shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, Number of Share Units	160,694	222,782
Performance Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested share units at beginning of period, Number of Share Units	531,437
Granted, Number of Share Units	226,971
Performance criteria adjustment, Number of Share Units	(142,772)
Actual vested, Number of share Units	(96,425)
Forfeited, Number of Share Units	(4,271)
Nonvested share units at end of period, Number of Share Units	514,940
Nonvested share units at beginning of period, Weighted Average Fair Value	$ 40.03
Granted, Weighted Average Fair Value	38.10	$ 45.06
Performance criteria adjustment, Weighted Average Fair Value	30.22
Actual vested, Weighted Average Fair Value	43.40
Forfeited, Weighted Average Fair Value	42.63
Nonvested share units at end of period, Weighted Average Fair Value	$ 41.25