COMMON STOCK: Level 4 (Details) $ in Billions	9 Months Ended
	Sep. 30, 2021 USD ($) shares
Shareholders' equity
Restricted Stock Unit Awards to Employees	76,147
IDACORP
Shareholders' equity
Stock Issued During Period, Shares, New Issues	54,594
Maximum leverage ratio requirement	0.65
Ratio of Indebtedness to Net Capital	0.43
Dividend Distribution Restriction Amount | $	$ 1.6
IDACORP | Directors
Shareholders' equity
Stock Issued During Period, Shares, New Issues	12,784
Idaho Power Company [Member]
Shareholders' equity
Maximum leverage ratio requirement	0.65
Ratio of Indebtedness to Net Capital	0.45
Dividend Distribution Restriction Amount | $	$ 1.4
Dividend Distribution Restriction Threshold	0.35
Ratio of total Capital to total capital and long-term debt	0.55
Preferred Stock, Shares Outstanding	0