CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents		$ 25
Cash, cash equivalents and restricted cash at end of period		25	$ 28
Accounts receivable, net		374	342
Accounts receivable from affiliates		13	8
Accrued unbilled revenues		350	298
Inventories		245	189
Regulatory assets		353	121
Derivative instruments		39	21
Prepayments and other		104	82
Total current assets		1,503	1,089
Property, plant and equipment, net		18,444	17,470
Other assets
Regulatory assets		1,293	1,059
Derivative instruments		27	16
Operating lease right-of-use assets		409	500
Other		246	231
Total other assets		1,975	1,806
Total assets		21,922	20,365
Current liabilities
Current portion of long-term debt		300	0
Borrowings under utility money pool arrangement		0	57
Short-term debt		147	136
Accounts payable		531	452
Accounts payable to affiliates		69	58
Regulatory liabilities	[1]	95	100
Taxes accrued		252	251
Accrued interest		58	61
Dividends payable to parent		104	105
Derivative instruments		30	27
Operating lease liabilities		84	97
Other		109	84
Total current liabilities		1,779	1,428
Deferred credits and other liabilities
Deferred income taxes		1,960	1,897
Regulatory liabilities	[1]	2,397	2,337
Asset retirement obligations		422	399
Derivative instruments		29	51
Customer advances		160	168
Pension and employee benefit obligations		23	161
Operating lease liabilities		351	432
Other		190	176
Total deferred credits and other liabilities		5,532	5,621
Commitments and contingencies
Capitalization
Long-term debt		6,167	5,724
Common stock — 100 shares authorized of $0.01 par value; 100 shares outstanding at Dec. 31, 2021 and Dec. 31, 2020, respectively		$ 0	$ 0
Common Stock, Shares Authorized		100	100
Common Stock, Par or Stated Value Per Share		$ 0.01	$ 0.01
Common Stock, Shares, Outstanding		100	100
Additional paid in capital		$ 6,426	$ 5,770
Retained earnings		2,040	1,846
Accumulated other comprehensive loss		(22)	(24)
Total common stockholder's equity		8,444	7,592
Total liabilities and stockholder's equity		$ 21,922	$ 20,365

[1] Revenue subject to refund of $2 million for 2021 is included in other current liabilities and none for 2020