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RELATED PARTY TRANSACTIONS: Related Party Transactions Level 4 (Details) - Idaho Power Company - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
IDACORP
Related Party Transaction
Revenues	$ 1.1	$ 0.9	$ 0.8
Idaho Power
Related Party Transaction
Accounts Payable	16.2	56.2
Ida-West
Related Party Transaction
Costs and Expenses, Related Party	$ 9.1	$ 7.9	$ 8.2

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