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REGULATORY MATTERS: Open Access Transmission Tariff Rates (Details) - Federal Open Access Transmission Tariff Rates - USD ($)	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Open Access Transmission Tariff Rates [Line Items]
Open Access Transmission Tariff Rate	$ 30.74	$ 31.42	$ 31.19	$ 29.95
Net Annual Transmission Revenue Requirement	$ 135,700,000

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- Definition

The load change adjustment rate is an element of the rate mechanism that recognizes the power supply expenses recovered through base rates change as loads increase or decrease. Rate is per megawatt-hour. This tag can also represent the open access same time draft rate, which is stated in kW/yr.

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No definition available.

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Name:	ida_LoadChangeAdjustmentRateOrOpenAccessSameTimeDraftRates
Namespace Prefix:	ida_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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- Definition

Net annual transmission revenue requirement amount used to determine transmission rates for transmission services provided under open access transmission tariff.

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No definition available.

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Name:	ida_NetAnnualTransmissionRevenueRequirement
Namespace Prefix:	ida_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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- Definition

[Line Items] for Open Access Transmission Tariff Rates [Table]

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No definition available.

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Name:	ida_OpenAccessTransmissionTariffRatesLineItems
Namespace Prefix:	ida_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Details

Name:	ida_RateCasesAxis=ida_FederalOpenAccessTransmissionTariffRatesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: