Condensed Consolidated Statements of Income and Comprehensive Income (Unaudited) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Revenues, net	$ 479	$ 484
Operating expenses:
Purchased power and fuel	195	194
Production and distribution	53	42
Administrative and other	54	52
Depreciation and amortization	62	56
Taxes other than income taxes	27	25
Total operating expenses	391	369
Income from operations	88	115
Other income:
Allowance for equity funds used during construction	1	1
Miscellaneous income, net	3	2
Other income, net	4	3
Interest expense	28	27
Income before income taxes	64	91
Income taxes	15	22
Net income and net income attributable to Portland General Electric Company	49	69
Comprehensive income and comprehensive income attributable to Portland General Electric Company	$ 49	$ 69
Weighted-average shares outstanding (in thousands):
Basic	75,423	75,318
Diluted	75,443	75,337
Earnings per share:
Basic and Diluted	$ 0.65	$ 0.92
Dividends declared per common share	$ 0.265	$ 0.260