Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 74	$ 6
Accounts receivable, net	133	144
Unbilled revenues	70	101
Inventories	80	71
Margin deposits	69	80
Regulatory assets - current	197	216
Deferred income tax assets	39	33
Other current assets	66	65
Total current assets	728	716
Electric utility plant, net	4,317	4,285
Regulatory assets - noncurrent	528	594
Nuclear decommissioning trust	37	37
Non-qualified benefit plan trust	34	36
Other noncurrent assets	58	65
Total assets	5,702	5,733
Current liabilities
Accounts payable	66	111
Liabilities from price risk mangement activities - current	193	216
Short-term debt	0	30
Current portion of long-term debt	150	100
Accrued expenses and other current liabilities	157	157
Total current liabilities	566	614
Long-term debt, net of current portion	1,586	1,635
Regulatory liabilities - noncurrent	755	720
Deferred income taxes	573	529
Liabilities from price risk mangement activities - noncurrent	120	172
Unfunded status of pension and postretirement plans	199	195
Non-qualified benefit plan liabilities	102	101
Other noncurrent liabilities	100	101
Total liabilities	4,001	4,067
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 as of June 30, 2012 and December 31, 2011	0	0
Common stock, no par value, 160,000,000 shares authorized; 75,527,281 and 75,362,956 shares issued and outstanding as of June 30, 2012 and December 31, 2011, respectively	837	836
Accumulated other comprehensive loss	(6)	(6)
Retained earnings	867	833
Total Portland General Electric Company shareholders' equity	1,698	1,663
Noncontrolling interests' equity	3	3
Total equity	1,701	1,666
Total liabilities and equity	$ 5,702	$ 5,733