Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 89	$ 6
Accounts receivable, net	151	155
Unbilled revenues	71	107
Inventories	70	82
Regulatory assets - current	42	36
Other current assets	43	77
Total current assets	466	463
Electric utility plant, net	6,638	6,434
Regulatory assets - noncurrent	526	498
Nuclear decommissioning trust	41	41
Non-qualified benefit plan trust	37	34
Other noncurrent assets	51	57
Total assets	7,759	7,527
Current liabilities
Accounts payable	100	129
Liabilities from price risk mangement activities - current	43	44
Current portion of long-term debt	100	150
Accrued expenses and other current liabilities	248	254
Total current liabilities	491	577
Long-term debt, net of current portion	2,277	2,200
Regulatory liabilities-noncurrent	1,002	958
Deferred income taxes	701	669
Unfunded status of pension and postretirement plans	288	281
Liabilities from price risk management activities-noncurrent	150	125
Asset retirement obligations	166	161
Non-qualified benefit plan liabilities	105	105
Other noncurrent liabilities	177	107
Total liabilities	5,357	5,183
Commitments and contingencies (see notes)
Equity:
Preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of September 30, 2017 and December 31, 2016	0	0
Common stock, no par value, 160,000,000 shares authorized; 89,091,955 and 88,946,704 shares issued and outstanding as of September 30, 2017 and December 31, 2016, respectively	1,204	1,201
Accumulated other comprehensive loss	(7)	(7)
Retained earnings	1,205	1,150
Total equity	2,402	2,344
Total liabilities and equity	$ 7,759	$ 7,527