Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 70	$ 39
Accounts receivable, net	152	168
Unbilled revenues	77	106
Inventories	80	78
Regulatory assets - current	72	62
Other current assets	81	73
Total current assets	532	526
Electric utility plant, net	6,781	6,741
Regulatory assets - noncurrent	448	438
Nuclear decommissioning trust	42	42
Non-qualified benefit plan trust	36	37
Other noncurrent assets	53	54
Total assets	7,892	7,838
Current liabilities
Accounts payable	97	132
Liabilities from price risk mangement activities - current	67	59
Accrued expenses and other current liabilities	229	241
Total current liabilities	393	432
Long-term debt, net of current portion	2,426	2,426
Regulatory liabilities-noncurrent	1,323	1,288
Deferred income taxes	378	376
Unfunded status of pension and postretirement plans	282	284
Liabilities from price risk management activities-noncurrent	144	151
Asset retirement obligations	191	167
Non-qualified benefit plan liabilities	108	106
Other noncurrent liabilities	198	192
Total liabilities	5,443	5,422
Commitments and contingencies (see notes)
Equity:
Preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of March 31, 2018 and December 31, 2017	0	0
Common stock, no par value, 160,000,000 shares authorized; 89,214,119 and 89,114,265 shares issued and outstanding as of March 31, 2018 and December 31, 2017, respectively	1,206	1,207
Accumulated other comprehensive loss	(8)	(8)
Retained earnings	1,251	1,217
Total equity	2,449	2,416
Total liabilities and equity	$ 7,892	$ 7,838