Supplementary Financial Information (Schedule Of Interest Expense And Related Charges) (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]
Interest	$ 117,000	$ 104,000	$ 335,000	$ 310,000
Amortization of debt issuance costs and discounts	3,000	3,000	8,000	8,000
Less AFUDC – capitalized interest portion	(5,000)	(3,000)	(12,000)	(10,000)
Total interest expense and related charges	$ 115,000	$ 104,000	$ 331,000	$ 308,000