CONSOLIDATED STATEMENTS OF CAPITALIZATION (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Common Stock, Shares Authorized	75,000,000	75,000,000
Shares Outstanding, common stock	41,538,343	41,343,851
Shares Authorized, preferred stock	1,000,000	1,000,000
Shares Outstanding, preferred stock	0	0
Par Value, preferred stock	$ 0	$ 0
TUCSON ELECTRIC POWER COMPANY
Common Stock, Shares Authorized	75,000,000	75,000,000
Shares Outstanding, common stock	32,139,434	32,139,434