Balance Sheet Components (Tables)

3 Months Ended

Mar. 31, 2016

Balance Sheet Components [Abstract]

Schedule of Other Current Assets [Table Text Block]

Other current assets consist of the following (in millions):

	March 31, 2016		December 31, 2015
Prepaid expenses	$	55	$	43
Margin deposits	40		33
Assets from price risk management activities	18		10
Other	—		2
Other current assets	$	113	$	88

Schedule of Public Utility Property, Plant, and Equipment [Table Text Block]

Electric utility plant, net consists of the following (in millions):

	March 31, 2016			December 31, 2015
Electric utility plant	$	8,663		$	8,560
Construction work-in-progress	647			545
Total cost	9,310			9,105
Less: accumulated depreciation and amortization	(3,150		)	(3,093		)
Electric utility plant, net	$	6,160		$	6,012

Capital Leases in Financial Statements of Lessee Disclosure [Text Block]

As of March 31, 2016, PGE’s estimated future minimum lease payments for the following five years and thereafter are as follows (in millions):

	Payments Due
	2017		2018		2019		2020		2021		Thereafter		Total
Total minimum lease payments	$	6	$	6	$	6	$	6	$	5	$	73	$	102
Less imputed interest													49
Present value of net minimum lease payments													$	53

Schedule of Regulatory Assets and Liabilities [Text Block]

Regulatory assets and liabilities consist of the following (in millions):

	March 31, 2016					December 31, 2015
	Current			Noncurrent		Current			Noncurrent
Regulatory assets:
Price risk management	$	124		$	159	$	120		$	161
Pension and other postretirement plans	—			235		—			239
Deferred income taxes	—			86		—			86
Debt issuance costs	—			24		—			16
Other	7			22		9			22
Total regulatory assets	$	131		$	526	$	129		$	524
Regulatory liabilities:
Asset retirement removal costs	$	—		$	850	$	—		$	837
Trojan decommissioning activities	21			11		17			15
Asset retirement obligations	—			46		—			45
Other	36			31		38			31
Total regulatory liabilities	$	57	*	$	938	$	55	*	$	928

* Included in Accrued expenses and other current liabilities in the condensed consolidated balance sheets.

Other Liabilities Disclosure [Text Block]

Accrued expenses and other current liabilities consist of the following (in millions):

	March 31, 2016		December 31, 2015
Regulatory liabilities—current	$	57	$	55
Accrued employee compensation and benefits	42		51
Accrued interest payable	40		25
Accrued dividends payable	28		28
Accrued taxes payable	30		25
Other	71		75
Total accrued expenses and other current liabilities	$	268	$	259

Pension and Other Postretirement Benefits Disclosure [Text Block]

Components of net periodic benefit cost under the defined benefit pension plan are as follows (in millions):

	Three Months Ended March 31,
	2016			2015
Service cost	$	4		$	4
Interest cost	8			8
Expected return on plan assets	(10		)	(10		)
Amortization of net actuarial loss	4			5
Net periodic benefit cost	$	6		$	7