Price Risk Management (Tables)

9 Months Ended

Sep. 30, 2012

Derivative [Line Items]

Schedule of Derivative Instruments [Table Text Block]

PGE’s net volumes related to its Assets and Liabilities from price risk management activities resulting from its derivative transactions, which are expected to deliver or settle through 2015, were as follows (in millions):

	September 30, 2012			December 31, 2011
Commodity contracts:
Electricity	10		MWh	13		MWh
Natural gas	85		Decatherms	79		Decatherms
Foreign currency	$	8	Canadian	$	6	Canadian

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

The fair value of PGE’s Assets and Liabilities from price risk management activities consists of the following (in millions):

	September 30, 2012			December 31, 2011
Current assets:
Commodity contracts:
Electricity	$	2		$	2
Natural gas	3			17
Total current derivative assets	5		(1)	19		(1)
Noncurrent assets:
Commodity contracts—Natural gas	5		(2)	—
Total derivative assets not designated as hedging instruments	$	10		$	19
Total derivative assets	$	10		$	19
Current liabilities:
Commodity contracts:
Electricity	$	54		$	66
Natural gas	93			150
Total current derivative liabilities	147			216
Noncurrent liabilities:
Commodity contracts:
Electricity	42			71
Natural gas	48			101
Total noncurrent derivative liabilities	90			172
Total derivative liabilities not designated as hedging instruments	$	237		$	388
Total derivative liabilities	$	237		$	388

(1) Included in Other current assets on the condensed consolidated balance sheets.

(2) Included in Other noncurrent assets on the condensed consolidated balance sheet.

Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]

Net realized and unrealized (gains) losses on derivative transactions not designated as hedging instruments are classified in Purchased power and fuel in the condensed consolidated statements of income and were as follows (in millions):

	Three Months Ended September 30,					Nine Months Ended September 30,
	2012			2011		2012		2011
Commodity contracts:
Electricity	$	(3	)	$	44	$	40	$	75
Natural Gas	(19		)	30		6		41

Net unrealized and certain net realized (gains) losses presented in the table above are offset within the consolidated statements of income by the effects of regulatory accounting.

Schedule of Price Risk Derivatives [Table Text Block]

Assuming no changes in market prices and interest rates, the following table indicates the year in which the net unrealized loss (gain) recorded as of September 30, 2012 related to PGE’s derivative activities would become realized as a result of the settlement of the underlying derivative instrument (in millions):

	2012		2013		2014		2015		2016			Total
Commodity contracts:
Electricity	$	13	$	46	$	24	$	11	$	—		$	94
Natural gas	35		72		24		4		(2		)	133
Net unrealized loss (gain)	$	48	$	118	$	48	$	15	$	(2	)	$	227

Schedule of Concentration of Risk, by Counterparty [Table Text Block]

Counterparties representing 10% or more of Assets and Liabilities from price risk management activities as of September 30, 2012 or December 31, 2011 were as follows:

	September 30, 2012		December 31, 2011
Assets from price risk management activities:
Counterparty A	15	%	19	%
Counterparty B	12		2
Counterparty C	11		16
Counterparty D	6		13
	44	%	50	%
Liabilities from price risk management activities:
Counterparty E	22	%	23	%
Counterparty F	13		10
	35	%	33	%