Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 127	$ 107
Accounts receivable, net	149	146
Unbilled revenues	93	104
Inventories, at average cost:
Materials and supplies	42	41
Fuel	40	24
Regulatory assets--current	133	66
Other current assets	115	103
Total current assets	699	591
Electric utility plant:
Generation	3,742	2,968
Transmission	440	417
Distribution	3,075	2,943
General	426	381
Intangible	478	386
Construction work-in-progress	417	508
Total electric utility plant	8,578	7,603
Accumulated depreciation and amortization	(2,899)	(2,723)
Electric utility plant, net	5,679	4,880
Regulatory assets--noncurrent	494	464
Nuclear decommissioning trust	90	82
Non-qualified benefit plan trust	32	35
Other noncurrent assets	48	49
Total assets	7,042	6,101
Current liabilities:
Accounts payable	156	173
Liabilities from price risk management activities-current	106	49
Current portion of long-term debt	375	0
Accrued expenses and other current liabilities	236	171
Total current liabilities	873	393
Long-term debt, net of current portion	2,126	1,916
Regulatory liabilities--noncurrent	906	865
Deferred income taxes	625	586
Unfunded status of pension and postretirement plans	237	154
Liabilities from price risk management activities--noncurrent	122	141
Asset retirement obligations	116	100
Non-qualified benefit plan liabilities	105	101
Other noncurrent liabilities	21	25
Total liabilities	5,131	4,281
Commitments and Contingencies (see notes)
Portland General Electric Company shareholders’ equity:
Preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding	0	0
Common stock, no par value, 160,000,000 shares authorized; 78,228,339 and 78,085,559 shares issued and outstanding as of December 31, 2014 and 2013, respectively	918	911
Accumulated other comprehensive loss	(7)	(5)
Retained earnings	1,000	913
Total Portland General Electric Company shareholders’ equity	1,911	1,819
Noncontrolling interests' equity	0	1
Total equity	1,911	1,820
Total liabilities and equity	$ 7,042	$ 6,101