Price Risk Management (Tables)

12 Months Ended

Dec. 31, 2015

Price Risk Management [Abstract]

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

PGE’s Assets and Liabilities from price risk management activities consist of the following (in millions): 

	As of December 31,
	2015			2014
Current assets:
Commodity contracts:
Electricity	$	7		$	4
Natural gas	3			2
Total current derivative assets	10		(1)	6		(1)
Noncurrent assets:
Commodity contracts:
Electricity	—			1
Total noncurrent derivative assets	—		(2)	1		(2)
Total derivative assets not designated as hedging instruments	$	10		$	7
Total derivative assets	$	10		$	7
Current liabilities:
Commodity contracts:
Electricity	$	36		$	54
Natural gas	94			52
Total current derivative liabilities	130			106
Noncurrent liabilities:
Commodity contracts:
Electricity	97			58
Natural gas	64			64
Total noncurrent derivative liabilities	161			122
Total derivative liabilities not designated as hedging instruments	$	291		$	228
Total derivative liabilities	$	291		$	228

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

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

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 at various dates through 2035, were as follows (in millions): 

	As of December 31,
	2015			2014
Commodity contracts:
Electricity	12		MWh	16		MWh
Natural gas	124		Dth	127		Dth
Foreign currency exchange	$	7	Canadian	$	7	Canadian

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

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

	Years Ended December 31,
	2015		2014		2013
Commodity contracts:
Electricity	$	72	$	13	$	78
Natural Gas	103		72		28
Foreign currency exchange	1		—		1

Net unrealized losses and certain net realized losses presented in the table above are offset within the consolidated statement of income by the effects of regulatory accounting. Of the net loss recognized in Net income for the years ended December 31, 2015, 2014, and 2013, $160 million, $83 million, and $120 million, respectively, have been offset.

Schedule of Price Risk Derivatives [Table Text Block]

Assuming no changes in market prices and interest rates, the following table presents the year in which the net unrealized loss recorded as of December 31, 2015 related to PGE’s derivative activities would be realized as a result of the settlement of the underlying derivative instrument (in millions):

	2016		2017		2018		2019		2020		Thereafter		Total
Commodity contracts:
Electricity	$	29	$	8	$	7	$	7	$	6	$	69	$	126
Natural gas	91		50		12		2		—		—		155
Net unrealized loss	$	120	$	58	$	19	$	9	$	6	$	69	$	281

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

Counterparties representing 10% or more of Assets and Liabilities from price risk management activities were as follows:

	As of December 31,
	2015		2014
Assets from price risk management activities:
Counterparty A	59	%	63	%
Counterparty B	10		14
	69	%	77	%
Liabilities from price risk management activities:
Counterparty C	36	%	22	%
Counterparty D	10		7
Counterparty E	10		9
Counterparty F	5		12
	61	%	50	%