Condensed Statements Of Consolidated Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Condensed Statements Of Consolidated Income [Abstract]
Operating revenues (Note 3)	$ 1,438,000	$ 1,286,000	$ 3,980,000	$ 3,572,000
Operating expenses:
Wholesale transmission service	291,000	261,000	862,000	770,000
Operation and maintenance	264,000	249,000	768,000	716,000
Depreciation and amortization	227,000	213,000	672,000	627,000
Provision in lieu of income taxes (Notes 9)	70,000	53,000	162,000	125,000
Taxes other than amounts related to income taxes	147,000	143,000	432,000	418,000
Total operating expenses	999,000	919,000	2,896,000	2,656,000
Operating income	439,000	367,000	1,084,000	916,000
Other deductions and (income) - net (Note 10)	9,000	8,000	19,000	22,000
Nonoperating benefit in lieu of income taxes	(3,000)	(3,000)	(7,000)	(9,000)
Interest expense and related charges (Note 10)	115,000	104,000	331,000	308,000
Net income	$ 318,000	$ 258,000	$ 741,000	$ 595,000