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RELATED PARTY TRANSACTIONS: Related Party Transactions Level 4 (Details) - Idaho Power Company - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
IDACORP
Related Party Transaction
Revenues	$ 1.5	$ 1.1	$ 1.1
Subsidiary of Common Parent [Member]
Related Party Transaction
Accounts Payable	3.3	3.2
Ida-West
Related Party Transaction
Costs and Expenses, Related Party	$ 9.5	$ 9.6	$ 9.1

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