CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Current assets
Cash, cash equivalents and restricted cash at beginning of period	$ 96	$ 28
Accounts receivable, net	324	342
Accounts receivable from affiliates	0	8
Accrued unbilled revenues	246	298
Inventories	166	189
Regulatory assets	179	121
Derivative instruments	36	21
Prepayments and other	69	82
Total current assets	1,116	1,089
Property, plant and equipment, net	17,845	17,470
Other assets
Regulatory assets	1,637	1,059
Derivative instruments	40	16
Operating lease right-of-use assets	454	500
Other	224	231
Total other assets	2,355	1,806
Total assets	21,316	20,365
Current liabilities
Borrowings under utility money pool arrangement	0	57
Short-term debt	0	136
Accounts payable	430	452
Accounts payable to affiliates	67	58
Regulatory liabilities	97	100
Taxes accrued	139	251
Accrued interest	58	61
Dividends payable to parent	119	105
Derivative instruments	35	27
Operating lease liabilities	98	97
Other	90	84
Total current liabilities	1,133	1,428
Deferred credits and other liabilities
Deferred income taxes	1,929	1,897
Regulatory liabilities	2,397	2,337
Asset retirement obligations	407	399
Derivative instruments	46	51
Customer advances	163	168
Pension and employee benefit obligations	111	161
Operating lease liabilities	384	432
Other	183	176
Total deferred credits and other liabilities	5,620	5,621
Commitments and contingencies
Capitalization
Long-term debt	$ 6,464	$ 5,724
Common Stock, Shares Authorized	100	100
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares, Outstanding	100	100
Common stock — 100 shares authorized of $0.01 par value; 100 shares outstanding at June 30, 2021 and Dec. 31, 2020, respectively	$ 0	$ 0
Additional paid in capital	6,210	5,770
Retained earnings	1,912	1,846
Accumulated other comprehensive loss	(23)	(24)
Total common stockholder's equity	8,099	7,592
Total liabilities and stockholder's equity	$ 21,316	$ 20,365