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Jointly-owned Plant | 12 Months Ended
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Dec. 31, 2013
Jointly-owned Plant Note [Abstract] |
Jointly-owned Plant [Text Block] | JOINTLY-OWNED PLANT PGE has interests in three jointly-owned generating facilities. Under the joint operating agreements, each participating owner is responsible for financing its share of construction, operating and leasing costs. PGE’s proportionate share of direct operating and maintenance expenses of the facilities is included in the corresponding operating and maintenance expense categories in the consolidated statements of income. In 1985, PGE sold a 15% undivided interest in Boardman and a 10.714% undivided interest in the Company’s share of the Pacific Northwest Intertie transmission line (jointly, the Facility Assets) to an unrelated third party (Purchaser). Under terms of the original 1985 agreements, on December 31, 2013, PGE acquired the Facility Assets from the Purchaser in exchange for $1 from the Purchaser. PGE assumed responsibility for the ARO related to that 15% interest in Boardman in the amount of $7 million. The acquisition of the 15% interest in Boardman increased the Company’s ownership share from 65% to 80% on December 31, 2013. As of December 31, 2013, 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 | 80.00 | % |  | 1980 |  | $ | 506 |  |  | $ | 326 |  |  | $ | 1 |
Colstrip | 20.00 |  |  | 1986 |  | 515 |  |  | 332 |  |  | 3 |
Pelton/Round Butte | 66.67 |  |  | 1958 | / | 1964 |  | 222 |  |  | 52 |  |  | 15 |
Total |  |  |  |  |  |  | $ | 1,243 |  |  | $ | 710 |  |  | $ | 19 |
* | Excludes AROs and accumulated asset retirement removal costs.

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