Related-Party Transactions (Schedule Of Cash Payments Made To (Received From) Related Parties) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Related Party Transaction [Line Items]
Federal income taxes	$ 76,000	$ 48,000
Texas margin taxes	24,000	23,000
Total payments	100,000	71,000
Sempra Texas Holdings [Member]
Related Party Transaction [Line Items]
Federal income taxes	61,000	38,000
Texas margin taxes	24,000	23,000
Total payments	85,000	61,000
Texas Transmission Investment LLC [Member]
Related Party Transaction [Line Items]
Federal income taxes	15,000	10,000
Total payments	$ 15,000	$ 10,000