Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) shares in Millions, $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Utility plant, net	$ 9,771	$ 9,705
Receivables, customer, allowance for uncollectible accounts	6	5
Total current assets	1,279	1,315
Total deferred debits and other assets	$ 3,660	$ 3,609
Common stock, par value	$ 0	$ 0
Common stock, shares outstanding	40.3	40.3
Variable Interest Entity, Primary Beneficiary [Member]
Utility plant, net	$ 718	$ 729
Total current assets	66	77
Total deferred debits and other assets	$ 27	$ 31