Consolidated Statements of Income (USD $) In Millions, except Share data in Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenues, net	$ 1,805	$ 1,813	$ 1,783
Operating expenses:
Purchased power and fuel	726	760	829
Production and distribution	211	201	174
Administrative and other	216	218	186
Depreciation and amortization	248	227	238
Taxes other than income taxes	102	98	89
Total operating expenses	1,503	1,504	1,516
Income from operations	302	309	267
Other income:
Allowance for equity funds used during construction	6	5	13
Miscellaneous income, net	4	1	4
Other income, net	10	6	17
Interest expense	108	110	110
Income before income taxes	204	205	174
Income taxes	64	58	53
Net income	140	147	121
Less: net loss attributable to noncontrolling interest	(1)	0	(4)
Net income attributable to Portland General Electric Company	$ 141	$ 147	$ 125
Weighted-average shares outstanding (in thousands):
Basic	75,498	75,333	75,275
Diluted	75,647	75,350	75,291
Earnings per share—basic and diluted	$ 1.87	$ 1.95	$ 1.66
Dividends declared per common share	$ 1.075	$ 1.055	$ 1.035