Commitments and Guarantees (Tables)

12 Months Ended

Dec. 31, 2016

Long-term Purchase Commitment [Line Items]

Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block]

As of December 31, 2016, PGE’s estimated future minimum payments pursuant to purchase obligations for the following five years and thereafter are as follows (in millions):

	Payments Due
	2017		2018		2019		2020		2021		Thereafter		Total
Capital and other purchase commitments	$	176	$	8	$	2	$	9	$	1	$	60	$	256
Purchased power and fuel:
Electricity purchases	221		157		181		256		239		1,750		2,804
Capacity contracts	7		6		5		4		4		12		38
Public utility districts	4		4		1		—		1		11		21
Natural gas	53		39		32		27		24		158		333
Coal and transportation	17		9		5		—		—		—		31
Total	$	478	$	223	$	226	$	296	$	269	$	1,991	$	3,483

Schedule of Long-term Contracts for Purchase of Electric Power [Table Text Block]

PGE has long-term power purchase agreements with certain public utility districts in the state of Washington and with the City of Portland, Oregon. Under the agreements, the Company is required to pay its proportionate share of the operating and debt service costs of the hydroelectric projects whether or not they are operable. The future minimum payments for the public utility districts in the preceding table reflect the principal payment only and do not include interest, operation, or maintenance expenses.

Selected information regarding these projects is summarized as follows (dollars in millions):

	Revenue Bonds as of December 31, 2016		PGE’s Share as of December 31, 2016			Contract Expiration	PGE Cost, including Debt Service
			Output		Capacity		2016		2015		2014
					(in MW)
Priest Rapids and Wanapum	$	1,190	8.6	%	163	2052	$	16	$	18	$	14
Wells	177		19.4		150	2018	10		10		10
Portland Hydro	—		100.0		36	2017	1		2		4

Contractual Obligation, Fiscal Year Maturity Schedule [Table Text Block]

As of December 31, 2016, PGE’s estimated future minimum lease payments pursuant to capital, build-to-suit, and operating leases for the following five years and thereafter are as follows (in millions):

	Future Minimum Lease Payments
	Capital Leases		Build-to-Suit		Operating Leases
2017	$	7	$	—	$	10
2018	7		4		9
2019	6		14		6
2020	6		13		6
2021	6		13		7
Thereafter	77		237		177
Total minimum lease payments	$	109	$	281	$	215
Less imputed interest	55
Present value of net minimum lease payments	$	54
Less current portion	3
Non-current portion	$	51