Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 200	$ 39
Accounts receivable, net	189	168
Unbilled revenues	73	106
Inventories	76	78
Regulatory assets - current	42	62
Other current assets	51	73
Total current assets	631	526
Electric utility plant, net	6,782	6,741
Regulatory assets - noncurrent	426	438
Nuclear decommissioning trust	42	42
Non-qualified benefit plan trust	39	37
Other noncurrent assets	55	54
Total assets	7,975	7,838
Current liabilities
Accounts payable	110	132
Liabilities from price risk mangement activities - current	42	59
Current portion of long-term debt	300	0
Accrued expenses and other current liabilities	251	241
Total current liabilities	703	432
Long-term debt, net of current portion	2,127	2,426
Regulatory liabilities-noncurrent	1,379	1,288
Deferred income taxes	372	376
Unfunded status of pension and postretirement plans	283	284
Liabilities from price risk management activities-noncurrent	124	151
Asset retirement obligations	196	167
Non-qualified benefit plan liabilities	106	106
Other noncurrent liabilities	199	192
Total liabilities	5,489	5,422
Commitments and contingencies (see notes)
Equity:
Preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of September 30, 2018 and December 31, 2017	0	0
Common stock, no par value, 160,000,000 shares authorized; 89,244,659 and 89,114,265 shares issued and outstanding as of September 30, 2018 and December 31, 2017, respectively	1,209	1,207
Accumulated other comprehensive loss	(8)	(8)
Retained earnings	1,285	1,217
Total equity	2,486	2,416
Total liabilities and equity	$ 7,975	$ 7,838