Condensed Statements Of Consolidated Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Condensed Statements Of Consolidated Income [Abstract]
Operating revenues (Note 3)	$ 1,249,000	$ 1,139,000
Operating expenses:
Wholesale transmission service	281,000	249,000
Operation and maintenance	249,000	235,000
Depreciation and amortization	222,000	205,000
Provision in lieu of income taxes (Note 9)	42,000	36,000
Taxes other than amounts related to income taxes	145,000	140,000
Total operating expenses	939,000	865,000
Operating income	310,000	274,000
Other deductions and (income) - net (Note 10)	11,000	7,000
Nonoperating benefit in lieu of income taxes	(3,000)	(3,000)
Interest expense and related charges (Note 10)	108,000	102,000
Net income	$ 194,000	$ 168,000