XML 49 R38.htm IDEA: XBRL DOCUMENT v3.23.3

Risk Management Net volumes related to price risk management activities (Details) MWh in Millions, MMBTU in Millions, $ in Millions	Sep. 30, 2023 CAD ($) MWh MMBTU	Dec. 31, 2022 CAD ($) MMBTU MWh
Commodity contracts:
Electricity | MWh	4	6
Natural gas | MMBTU	209	211
Foreign currency | $	$ 11	$ 10

X

- Definition

Commodity contracts: [Abstract]

+ References

No definition available.

+ Details

Name:	por_CurrentAssetsCommodityContractsAbstract
Namespace Prefix:	por_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Net volume associated with the reporting entity's derivative instruments recorded as of the balance sheet date having arisen from price risk management activities related to natural gas.

+ References

No definition available.

+ Details

Name:	por_VolumeRelatedToDerivativeInstrumentsAtBalanceSheetDateCommodityContractsNaturalGas
Namespace Prefix:	por_
Data Type:	dtr-types1:energyItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Net volume related to the reporting entity's derivative instruments as of the balance sheet date having arisen from price risk management activities.

+ References

No definition available.

+ Details

Name:	por_VolumeRelatedToDerivativeInstrumentsHeldAtBalanceSheetDateCommodityContractsElectricity
Namespace Prefix:	por_
Data Type:	dtr-types1:energyItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Net amount associated with the reporting entity's derivative instruments recorded as of the balance sheet date having arisen from price risk management activities related to foreign currency.

+ References

No definition available.

+ Details

Name:	por_VolumeRelatedtoDerivativeInstrumentsHeldatBalanceSheetDateForeignCurrency
Namespace Prefix:	por_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant