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CAPITALIZATION
6 Months Ended
Jun. 30, 2012
CAPITALIZATION [Abstract]  
CAPITALIZATION
(B)
CAPITALIZATION

Common Stock

UIL Holdings had 50,665,114 shares of its common stock, no par value, outstanding at June 30, 2012.

Long-Term Debt
 
Due to conditions in the municipal bond market, UIL Holdings determined it was economically favorable to refinance multiple series of pollution control revenue bonds in the aggregate principal amount outstanding of $103.5 million with notes issued in the private placement market.  On January 30, 2012, UI entered into a Note Purchase Agreement with a group of institutional accredited investors to issue $203.5 million principal amount of senior unsecured notes.   On January 30, 2012, $103.5 million of such notes were issued as follows:  3.61%, Series B, due January 31, 2022, in the principal amount of $51.5 million and 4.89%, Series D, due January 30, 2042, in the principal amount of $52 million.  On April 2, 2012, the remaining $100 million of such notes were issued as follows:  2.98%, Series A, due January 31, 2019, in the principal amount of $31 million, 3.61%, Series C, due January 31, 2022 in the principal amount of $34 million and 4.89%, Series E, due January 30, 2042, in the principal amount of $35 million.