CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Current assets
Cash, cash equivalents and restricted cash at beginning of period	$ 657	$ 46
Accounts receivable, net	385	392
Accounts receivable from affiliates	20	32
Accrued unbilled revenues	205	248
Inventories	253	295
Regulatory assets	554	411
Derivative instruments	8	17
Prepayments and other	47	50
Total current assets	2,129	1,491
Property, plant and equipment, net	15,679	15,308
Other assets
Nuclear decommissioning fund and other investments	2,881	2,830
Regulatory assets	1,047	924
Derivative instruments	26	5
Operating lease right-of-use assets	469	488
Other	19	14
Total other assets	4,442	4,261
Total assets	22,250	21,060
Current liabilities
Short-term debt	0	179
Accounts payable	461	438
Accounts payable to affiliates	43	66
Regulatory liabilities	115	123
Taxes accrued	314	263
Accrued interest	58	72
Dividends payable to parent	108	106
Derivative instruments	15	22
Operating Lease, Liability, Current	91	85
Other	177	154
Total current liabilities	1,382	1,508
Deferred credits and other liabilities
Deferred Income Tax Liabilities, Net	1,854	1,840
Deferred investment tax credits	18	18
Regulatory liabilities	1,899	1,896
Asset retirement obligations	2,440	2,350
Derivative instruments	84	71
Pension and employee benefit obligations	155	192
Operating lease liabilities	416	443
Other	71	69
Total deferred credits and other liabilities	6,937	6,879
Capitalization
Long-term debt	6,741	5,904
Common stock — 5,000,000 shares authorized of $0.01 par value; 1,000,000 shares outstanding at March 31, 2021 and Dec. 31, 2020, respectively	$ 0	$ 0
Common Stock, Shares Authorized	5,000,000	5,000,000
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares, Outstanding	1,000,000	1,000,000
Additional paid in capital	$ 4,985	$ 4,585
Retained earnings	2,226	2,206
Accumulated other comprehensive loss	(21)	(22)
Total common stockholder's equity	7,190	6,769
Total liabilities and equity	$ 22,250	$ 21,060