Supplementary Financial Information (Schedule Of Other Deductions And (Income)) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Supplementary Financial Information [Abstract]
Professional fees	$ 2,000	$ 2,000	$ 5,000	$ 6,000
Recoverable pension and OPEB - non-service costs	14,000	13,000	41,000	40,000
Non-recoverable pension and OPEB		1,000		2,000
Gain from sale of non-utility property		(1,000)	(11,000)	(1,000)
AFUDC - equity income	(9,000)	(6,000)	(23,000)	(19,000)
Interest and investment income	1,000	(1,000)	5,000	(8,000)
Other	1,000		2,000	2,000
Total other deductions and (income) - net	$ 9,000	$ 8,000	$ 19,000	$ 22,000