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Related-Party Transactions (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Oct. 24, 2022	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Related Party Transaction [Line Items]
Revenue		$ 1,438,000	$ 1,286,000	$ 3,980,000	$ 3,572,000
Members contribution				$ 318,000	188,000
Subsequent Event [Member]
Related Party Transaction [Line Items]
Members contribution	$ 106,000
Sempra Texas Holdings [Member] \| Sharyland Distribution & Transmission Services (SDTS) [Member]
Related Party Transaction [Line Items]
Percentage of membership interest owned by non-controlling owners		50.00%		50.00%
Sharyland Distribution & Transmission Services (SDTS) [Member]
Related Party Transaction [Line Items]
Revenue		$ 4,000	$ 1,000	$ 7,000	8,000
Maximum [Member] \| Sharyland Distribution & Transmission Services (SDTS) [Member]
Related Party Transaction [Line Items]
Cash payments to vendors				$ 1,000	$ 1,000