COMMON STOCK: Level 4 (Details) $ in Millions	3 Months Ended
	Mar. 31, 2016 USD ($) shares
IDACORP
Shareholders' equity
Stock Issued During Period, Shares, New Issues	67,966
Maximum leverage ratio requirement	0.65
Ratio of Indebtedness to Net Capital	0.48
Dividend Distribution Restriction Amount | $	$ 1,100
IDACORP | Continuous equity program
Shareholders' equity
Stock Issued During Period, Shares, New Issues	0
Remaining shares available under sales agency agreement	3,000,000
Idaho Power Company
Shareholders' equity
Maximum leverage ratio requirement	0.65
Ratio of Indebtedness to Net Capital	0.49
Dividend Distribution Restriction Amount | $	$ 916
Dividend Distribution Restriction Threshold	0.35
Ratio of total Capital to total capital and long-term debt	0.51
Preferred Stock, Shares Outstanding	0