Price Risk Management (Tables)

12 Months Ended

Dec. 31, 2018

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,
	2018			2017
Current assets:
Commodity contracts:
Electricity	$	11		$	3
Natural gas	7			3
Total current derivative assets	18		(1)	6		(1)
Noncurrent assets:
Commodity contracts:
Electricity	1			—
Natural gas	1			—
Total noncurrent derivative assets	2		(2)	—		(2)
Total derivative assets not designated as hedging instruments	$	20		$	6
Total derivative assets	$	20		$	6
Current liabilities:
Commodity contracts:
Electricity	$	16		$	13
Natural gas	35			46
Total current derivative liabilities	51			59
Noncurrent liabilities:
Commodity contracts:
Electricity	78			122
Natural gas	23			29
Total noncurrent derivative liabilities	101			151
Total derivative liabilities not designated as hedging instruments	$	152		$	210
Total derivative liabilities	$	152		$	210

(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,
	2018			2017
Commodity contracts:
Electricity	5		MWh	7		MWh
Natural gas	123		Dth	114		Dth
Foreign currency exchange	$	18	Canadian	$	21	Canadian

Derivatives Not Designated as Hedging Instruments [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,
	2018			2017			2016
Commodity contracts:
Electricity	$	(34	)	$	41		$	34
Natural Gas	21			85			(56		)
Foreign currency exchange	1			(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. Of the net amounts recognized in Net income, net gains of $18 million, net losses of $82 million, and net gains of $13 million for the years ended December 31, 2018, 2017, and 2016, 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, 2018 related to PGE’s derivative activities would become realized as a result of the settlement of the underlying derivative instrument (in millions):

	2019		2020		2021		2022		2023		Thereafter		Total
Commodity contracts:
Electricity	$	4	$	6	$	6	$	6	$	6	$	55	$	83
Natural gas	28		14		6		1		—		—		49
Net unrealized loss	$	32	$	20	$	12	$	7	$	6	$	55	$	132

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,
	2018		2017
Assets from price risk management activities:
Counterparty A	42	%	39	%
Counterparty B	15		—
Counterparty C	5		12
	62	%	51	%
Liabilities from price risk management activities:
Counterparty D	56	%	62	%
	56	%	62	%