XML 57 R51.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Variable Interest Entities (Details) (USD $) In Millions, unless otherwise specified | Mar. 31, 2014 | Dec. 31, 2013
--- | --- | ---
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net | $ 5 | $ 5
Variable Interest Entity, Consolidated, Carrying Amount, Cash and Cash Equivalents | $ 1 | $ 1

X
- Definition The carrying amount of the consolidated variable interest entities' cash and cash equivalents included in the reporting entity's statement of financial position. + References No definition available. + Details
Name: | por_VariableInterestEntityConsolidatedCarryingAmountCashAndCashEquivalents
Namespace Prefix: | por_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The net carrying amount of the consolidated Variable Interest Entity's assets and liabilities included in the reporting entity's statement of financial position. + References No definition available. + Details
Name: | us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant