CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 2	$ 2
Accounts receivable, net	61	70
Accrued unbilled revenues	48	53
Other Receivables	2	1
Inventories	15	15
Regulatory assets	47	19
Prepaid taxes	30	24
Prepayments and other	5	7
Total current assets	210	191
Property, Plant and Equipment, Net [Abstract]
Property, plant and equipment, net	2,541	2,484
Other assets
Regulatory assets	216	215
Other Investments	3	3
Other	2	1
Total other assets	221	219
Total assets	2,972	2,894
Current liabilities
Current portion of long-term debt	19	19
Short-term debt	0	19
Borrowings under utility money pool arrangement	33	0
Accounts payable	47	41
Accounts payable to affiliates	29	15
Dividends payable to parent	15	19
Regulatory liabilities	7	31
Taxes accrued	8	12
Environmental liabilities	4	4
Accrued interest	10	10
Other	17	15
Total current liabilities	189	185
Deferred credits and other liabilities
Deferred income taxes	321	307
Deferred investment tax credits	6	0
Regulatory liabilities	369	350
Environmental liabilities	15	16
Customer advances	21	20
Pension and employee benefit obligations	23	28
Other	27	33
Total deferred credits and other liabilities	782	754
Commitments and contingencies
Capitalization
Long-term debt	888	887
Common Stock - 1,000,000 shares authorized of $100 par value; 933,000 shares outstanding at Sept. 30, 2020 and Dec. 31, 2019, respectively	$ 93	$ 93
Common stock, shares authorized (in shares)	1,000,000	1,000,000
Common stock, par value (in dollars per share)	$ 100	$ 100
Common stock, shares outstanding (in shares)	933,000	933,000
Additional paid in capital	$ 638	$ 605
Retained earnings	382	370
Total common stockholder's equity	1,113	1,068
Total liabilities and equity	$ 2,972	$ 2,894