Jointly-owned Plant (Tables)

12 Months Ended

Dec. 31, 2017

Jointly-owned Plant [Abstract]

Schedule of Jointly Owned Utility Plants [Table Text Block]

As of December 31, 2017, PGE had the following investments in jointly-owned plant (dollars in millions):

	PGE Share		In-service Date			Plant In-service		Accumulated Depreciation*		Construction Work In Progress
Boardman	90.00	%	1980			$	515	$	426	$	—
Colstrip	20.00		1986			546		351		5
Pelton/Round Butte	66.67		1958	/	1964	251		68		7
Total						$	1,312	$	845	$	12

* Excludes AROs and accumulated asset retirement removal costs.