SUPPLEMENTARY INFORMATION (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Electric Distribution and Transmission:
Retail	$ 181,712	$ 212,405	$ 511,771	$ 573,532
Wholesale	133	270	324	331
Other operating revenue	38,975	23,599	90,387	89,800
Total Electric Distribution and Transmission Revenue	220,820	236,274	602,482	663,663
Gas Distribution
Retail	80,331	0	510,799	0
Wholesale	17,596	0	55,108	0
Other operating revenue	2,652	0	28,105	0
Total Gas Distribution Revenue	100,579	0	594,012	0
Non-utility revenues
Other	28	3	35	10
Total Operating Revenues	321,427	236,277	1,196,529	663,673
Depreciation and Amortization
Property, plant and equipment depreciation	24,591	11,968	72,029	38,114
Amortization of nuclear plant regulatory assets	13,416	13,055	34,340	35,584
Amortization of intangibles	12	10	35	33
Amortization of other regulatory assets	349	3,350	2,537	8,941
Total Amortization	13,777	16,415	36,912	44,558
Total Depreciation and Amortization	38,368	28,383	108,941	82,672
Taxes - Other than Income Taxes
Connecticut gross earnings	14,525	13,897	54,322	35,849
Local real estate and personal property	9,375	5,177	25,845	14,209
Payroll taxes	2,507	1,164	7,869	4,476
Other	(8)	0	(230)	0
Total Taxes - Other than Income Taxes	26,399	20,238	87,806	54,534
Other Income and (Deductions), net
Interest income	791	1,115	2,585	3,178
Allowance for funds used during construction - equity	2,340	2,000	7,657	4,716
Allowance for funds used during construction - debt	2,303	1,252	6,579	3,228
Conservation & Load Management incentive	271	361	813	1,006
Energy generation and load curtailment incentives	15	0	55	882
ISO load response, net	601	411	509	1,463
Miscellaneous other income and (deductions) - net	2,071	452	463	78
Other Income and (Deductions), net	8,392	5,591	18,661	14,551
Other Interest, net
Notes Payable	0	20	129	84
Other	2,647	151	4,247	506
Total Other Interest, net	$ 2,647	$ 171	$ 4,376	$ 590