Condensed Consolidated Balance Sheets (Unaudited) - USD ($)	Mar. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 4,000,000	$ 4,000,000
Accounts receivable, net	130,000,000	158,000,000
Unbilled revenues	77,000,000	95,000,000
Inventories	82,000,000	83,000,000
Regulatory assets - current	131,000,000	129,000,000
Other current assets	113,000,000	88,000,000
Total current assets	537,000,000	557,000,000
Electric utility plant, net	6,160,000,000	6,012,000,000
Regulatory assets - noncurrent	526,000,000	524,000,000
Nuclear decommissioning trust	41,000,000	40,000,000
Non-qualified benefit plan trust	32,000,000	33,000,000
Other noncurrent assets	48,000,000	44,000,000
Total assets	7,344,000,000	7,210,000,000
Current liabilities
Accounts payable	98,000,000	98,000,000
Liabilities from price risk mangement activities - current	142,000,000	130,000,000
Short-term debt	0	6,000,000
Current portion of long-term debt	0	133,000,000
Accrued expenses and other current liabilities	268,000,000	259,000,000
Total current liabilities	508,000,000	626,000,000
Long-term debt, net of current portion	2,199,000,000	2,060,000,000
Regulatory liabilities - noncurrent	938,000,000	928,000,000
Deferred income taxes	646,000,000	632,000,000
Unfunded status of pension and postretirement plans	261,000,000	259,000,000
Liabilities from price risk mangement activities - noncurrent	161,000,000	161,000,000
Asset retirement obligations	152,000,000	151,000,000
Non-qualified benefit plan liabilities	106,000,000	106,000,000
Other noncurrent liabilities	82,000,000	29,000,000
Total liabilities	$ 5,053,000,000	$ 4,952,000,000
Commitments and contingencies (see notes)
Equity:
Preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of March 31, 2016 and December 31, 2015	$ 0	$ 0
Common stock, no par value, 160,000,000 shares authorized; 88,899,359 and 88,792,751 shares issued and outstanding as of March 31, 2016 and December 31, 2015, respectively	1,195,000,000	1,196,000,000
Accumulated other comprehensive loss	(8,000,000)	(8,000,000)
Retained earnings	1,104,000,000	1,070,000,000
Total equity	2,291,000,000	2,258,000,000
Total liabilities and equity	$ 7,344,000,000	$ 7,210,000,000