Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 107	$ 12
Accounts receivable, net	146	152
Unbilled revenues	104	97
Inventories, at average cost:
Materials and supplies	41	38
Fuel	24	40
Margin deposit	9	46
Regulatory assets--current	66	144
Other current assets	94	93
Total current assets	591	622
Electric utility plant:
Production	2,968	2,899
Transmission	417	412
Distribution	2,943	2,816
General	381	327
Intangible	386	357
Construction work-in-progress	508	140
Total electric utility plant	7,603	6,951
Accumulated depreciation and amortization	(2,723)	(2,559)
Electric utility plant, net	4,880	4,392
Regulatory assets--noncurrent	464	524
Nuclear decommissioning trust	82	38
Non-qualified benefit plan trust	35	32
Other noncurrent assets	49	62
Total assets	6,101	5,670
Current liabilities:
Accounts payable	173	98
Liabilities from price risk management activities-current	49	127
Short-term debt	0	17
Current portion of long-term debt	0	100
Accrued expenses and other current liabilities	171	179
Total current liabilities	393	521
Long-term debt, net of current portion	1,916	1,536
Regulatory liabilities--noncurrent	865	765
Deferred income taxes	586	588
Unfunded status of pension and postretirement plans	154	247
Liabilities from price risk management activities--noncurrent	141	73
Non-qualified benefit plan liabilities	101	102
Asset retirement obligations	100	94
Other noncurrent liabilities	25	14
Total liabilities	4,281	3,940
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; 78,085,559 and 75,556,272 shares issued and outstanding as of December 31, 2013 and 2012, respectively	911	841
Accumulated other comprehensive loss	(5)	(6)
Retained earnings	913	893
Total Portland General Electric Company shareholders’ equity	1,819	1,728
Noncontrolling interests' equity	1	2
Total equity	1,820	1,730
Total liabilities and equity	$ 6,101	$ 5,670