Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) shares in Millions, $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Utility plant, net	$ 11,971	$ 11,662
Receivables, customer, allowance for uncollectible accounts	6	6
Total current assets	1,383	1,316
Total deferred debits and other assets	$ 3,680	$ 3,779
Common stock, par value	$ 0	$ 0
Common stock, shares outstanding	40.3	40.3
Variable Interest Entity, Primary Beneficiary [Member]
Utility plant, net	$ 820	$ 824
Total current assets	80	79
Total deferred debits and other assets	$ 28	$ 25