Price Risk Management (Tables)

12 Months Ended

Dec. 31, 2016

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,
	2016			2015
Current assets:
Commodity contracts:
Electricity	$	6		$	7
Natural gas	12			3
Total current derivative assets	18		(1)	10		(1)
Noncurrent assets:
Commodity contracts:
Electricity	1			—
Natural gas	4			—
Total noncurrent derivative assets	5		(2)	—		(2)
Total derivative assets not designated as hedging instruments	$	23		$	10
Total derivative assets	$	23		$	10
Current liabilities:
Commodity contracts:
Electricity	$	12		$	36
Natural gas	32			94
Total current derivative liabilities	44			130
Noncurrent liabilities:
Commodity contracts:
Electricity	106			97
Natural gas	19			64
Total noncurrent derivative liabilities	125			161
Total derivative liabilities not designated as hedging instruments	$	169		$	291
Total derivative liabilities	$	169		$	291

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

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

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,
	2016			2015
Commodity contracts:
Electricity	8		MWh	12		MWh
Natural gas	107		Dth	124		Dth
Foreign currency exchange	$	22	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 (gains) 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,
	2016			2015		2014
Commodity contracts:
Electricity	$	34		$	72	$	13
Natural Gas	(56		)	103		72
Foreign currency exchange	—			1		—

Net unrealized and certain net realized losses (gains) presented in the table above are offset within the consolidated statements of income by the effects of regulatory accounting. Net (gains) of $13 million and net losses of $160 million and $83 million for the years ended December 31, 2016, 2015, and 2014, respectively, have been offset in Net income.

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, 2016 related to PGE’s derivative activities would be realized as a result of the settlement of the underlying derivative instrument (in millions):

	2017		2018		2019		2020		2021		Thereafter		Total
Commodity contracts:
Electricity	$	6	$	7	$	7	$	7	$	7	$	77	$	111
Natural gas	20		7		6		2		—		—		35
Net unrealized loss	$	26	$	14	$	13	$	9	$	7	$	77	$	146

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,
	2016		2015
Assets from price risk management activities:
Counterparty A	22	%	5	%
Counterparty B	17		8
Counterparty C	12		8
Counterparty D	8		10
Counterparty E	1		59
	60	%	90	%
Liabilities from price risk management activities:
Counterparty F	66	%	36	%
Counterparty C	7	%	10	%
Counterparty B	5	%	10	%
	78	%	56	%