CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 12	$ 2
Accounts receivable, net	60	70
Accrued unbilled revenues	45	53
Other Receivables	3	1
Inventories	23	15
Regulatory assets	43	19
Prepaid taxes	18	24
Prepayments and other	8	7
Total current assets	212	191
Property, Plant and Equipment, Net [Abstract]
Property, plant and equipment, net	2,590	2,484
Other assets
Regulatory assets	219	215
Other Investments	3	3
Other	1	1
Total other assets	223	219
Total assets	3,025	2,894
Current liabilities
Current portion of long-term debt	19	19
Short-term debt	0	19
Accounts payable	46	41
Accounts payable to affiliates	21	15
Dividends payable to parent	20	19
Regulatory liabilities	8	31
Taxes accrued	4	12
Environmental liabilities	4	4
Accrued interest	10	10
Other	16	15
Total current liabilities	148	185
Deferred credits and other liabilities
Deferred income taxes	324	307
Regulatory liabilities	369	350
Environmental liabilities	15	16
Customer advances	23	20
Pension and employee benefit obligations	23	28
Other	33	33
Total deferred credits and other liabilities	787	754
Commitments and contingencies
Capitalization
Long-term debt	987	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	$ 641	$ 605
Retained earnings	369	370
Total common stockholder's equity	1,103	1,068
Total liabilities and equity	$ 3,025	$ 2,894