Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Millions, $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Utility plant, net	$ 8,915	$ 8,783
Receivables, customer, allowance for uncollectible accounts	3	4
Total current assets	1,118	1,689
Total deferred debits and other assets	$ 3,985	$ 4,228
Common stock, par value	$ 0	$ 0
Common stock, shares outstanding	40.3	40.3
Variable Interest Entity, Primary Beneficiary [Member]
Utility plant, net	$ 727	$ 711
Total current assets	143	96
Total deferred debits and other assets	$ 32	$ 34