Condensed Statements Of Consolidated Comprehensive 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 Comprehensive Income [Abstract]
Net income	$ 318,000	$ 258,000	$ 741,000	$ 595,000
Other comprehensive income:
Net effects of cash flow hedges (net of tax)	1,000	1,000	2,000	2,000
Defined benefit pension plans (net of tax)	1,000	1,000	3,000	5,000
Total other comprehensive income	2,000	2,000	5,000	7,000
Comprehensive income	$ 320,000	$ 260,000	$ 746,000	$ 602,000