Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) shares in Millions, $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Utility plant, net	$ 8,711	$ 8,783
Receivables, customer, allowance for uncollectible accounts	7	4
Total current assets	1,179	1,688
Total deferred debits and other assets	$ 4,116	$ 4,229
Common Stock, Par Value	$ 0	$ 0
Common Stock, Shares, Outstanding	40.3	40.3
Variable Interest Entity, Primary Beneficiary [Member]
Utility plant, net	$ 690	$ 711
Total current assets	133	96
Total deferred debits and other assets	$ 34	$ 34