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SUPPLEMENTARY INFORMATION (Tables)
6 Months Ended
Jun. 30, 2011
SUPPLEMENTARY INFORMATION [Abstract]  
Schedule of Supplementary Information
(F)  SUPPLEMENTARY INFORMATION
            
              
   
Three Months Ended
  
Six Months Ended
 
   
June 30,
  
June 30,
 
   
2011
  
2010
  
2011
  
2010
 
   
(In Thousands)
 
Operating Revenues
            
Electric Distribution and Transmission:
            
   Retail
 $160,526  $174,307  $330,059  $361,127 
   Wholesale
  113   61   191   61 
   Other operating revenue
  22,797   32,745   51,412   66,201 
      Total Electric Distribution and Transmission Revenue
  183,436   207,113   381,662   427,389 
Gas Distribution:
                
   Retail
  112,049   N/A   430,468   N/A 
   Wholesale
  15,680   N/A   37,512   N/A 
   Other operating revenue
  2,880   N/A   25,453   N/A 
      Total Gas Distribution Revenue
  130,609   N/A   493,433   N/A 
Non-utility revenues:
                
   Other
  4   3   7   7 
      Total Operating Revenues
 $314,049  $207,116  $875,102  $427,396 
                  
Depreciation and Amortization
                
Property, plant and equipment depreciation
 $23,793  $13,191  $47,438  $26,146 
Amortization of nuclear plant regulatory assets
  10,176   10,485   20,924   22,529 
Amortization of intangibles
  11   13   23   23 
Amortization of other regulatory assets
  488   3,349   2,188   5,591 
      Total Amortization
  10,675   13,847   23,135   28,143 
      Total Depreciation and Amortization
 $34,468  $27,038  $70,573  $54,289 
                  
Taxes - Other than Income Taxes
                
Operating:
                
   Connecticut gross earnings
 $15,531  $10,868  $39,797  $21,952 
   Local real estate and personal property
  8,047   4,485   16,470   9,032 
   Payroll taxes
  2,324   1,239   5,362   3,312 
   Other
  (2)  -   (222)  - 
      Total Taxes - Other than Income Taxes
 $25,900  $16,592  $61,407  $34,296 
                  
Other Income and (Deductions), net
                
Interest income
 $1,072  $1,068  $1,794  $2,063 
Allowance for funds used during construction - equity
  2,672   1,697   5,317   2,716 
Allowance for funds used during construction - debt
  2,261   1,044   4,276   1,976 
Conservation & Load Management incentive
  271   361   542   645 
Energy generation and load curtailment incentives
  20   863   40   882 
ISO load response, net
  (251)  545   (92)  1,052 
Miscellaneous other income and (deductions) - net
  (441)  (674)  (1,608)  (374)
      Total Other Income and (Deductions), net
 $5,604  $4,904  $10,269  $8,960 
                  
Other Interest, net
                
Notes Payable
 $30  $38  $129  $64 
Other
  392   100   1,600   355 
      Total Other Interest, net
 $422  $138  $1,729  $419