Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 31	$ 6
Accounts receivable, net	162	155
Unbilled revenues	71	107
Inventories	77	82
Regulatory assets - current	57	36
Other current assets	87	77
Total current assets	485	463
Electric utility plant, net	6,466	6,434
Regulatory assets - noncurrent	532	498
Nuclear decommissioning trust	41	41
Non-qualified benefit plan trust	34	34
Other noncurrent assets	54	57
Total assets	7,612	7,527
Current liabilities
Accounts payable	92	129
Liabilities from price risk mangement activities - current	59	44
Current portion of long-term debt	150	150
Accrued expenses and other current liabilities	247	254
Total current liabilities	548	577
Long-term debt, net of current portion	2,200	2,200
Regulatory liabilities - noncurrent	973	958
Deferred income taxes	682	669
Unfunded status of pension and postretirement plans	283	281
Liabilities from price risk mangement activities - noncurrent	156	125
Asset retirement obligations	164	161
Non-qualified benefit plan liabilities	106	105
Other noncurrent liabilities	113	107
Total liabilities	5,225	5,183
Commitments and contingencies (see notes)
Equity:
Preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of March 31, 2017 and December 31, 2016	0	0
Common stock, no par value, 160,000,000 shares authorized; 89,067,858 and 88,946,704 shares issued and outstanding as of March 31, 2017 and December 31, 2016, respectively	1,200	1,201
Accumulated other comprehensive loss	(8)	(7)
Retained earnings	1,195	1,150
Total equity	2,387	2,344
Total liabilities and equity	$ 7,612	$ 7,527