Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 48	$ 39
Accounts receivable, net	162	168
Unbilled revenues	86	106
Inventories	85	78
Regulatory assets - current	56	62
Other current assets	56	73
Total current assets	493	526
Electric utility plant, net	6,840	6,741
Regulatory assets - noncurrent	441	438
Nuclear decommissioning trust	42	42
Non-qualified benefit plan trust	38	37
Other noncurrent assets	55	54
Total assets	7,909	7,838
Current liabilities
Accounts payable	103	132
Liabilities from price risk mangement activities - current	51	59
Current portion of long-term debt	300	0
Accrued expenses and other current liabilities	225	241
Total current liabilities	679	432
Long-term debt, net of current portion	2,126	2,426
Regulatory liabilities-noncurrent	1,348	1,288
Deferred income taxes	378	376
Unfunded status of pension and postretirement plans	280	284
Liabilities from price risk management activities-noncurrent	136	151
Asset retirement obligations	192	167
Non-qualified benefit plan liabilities	107	106
Other noncurrent liabilities	198	192
Total liabilities	5,444	5,422
Commitments and contingencies (see notes)
Equity:
Preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of June 30, 2018 and December 31, 2017	0	0
Common stock, no par value, 160,000,000 shares authorized; 89,238,206 and 89,114,265 shares issued and outstanding as of June 30, 2018 and December 31, 2017, respectively	1,208	1,207
Accumulated other comprehensive loss	(8)	(8)
Retained earnings	1,265	1,217
Total equity	2,465	2,416
Total liabilities and equity	$ 7,909	$ 7,838