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Idaho Power Company Consolidated Statements of Retained Earnings - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance	$ 2,814,615
Net Income	261,893	$ 259,560	$ 245,872
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	2,914,743	2,814,615
Retained earnings	2,036,138	1,937,972
Retained Earnings
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance	1,937,972	1,833,580	1,734,103
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	2,036,138	1,937,972	1,833,580
Idaho Power Company
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance	2,631,663
Net Income	256,810	254,867	243,225
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	2,782,173	2,631,663
Retained earnings	1,991,319	1,836,547
Idaho Power Company | Retained Earnings
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Net Income	256,810	254,867	243,225
Dividends on Common Stock	(102,038)	(114,624)	(146,076)
Retained earnings	$ 1,991,319	$ 1,836,547	$ 1,696,304	$ 1,599,155

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