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REGULATORY ACCOUNTING (Tables)
6 Months Ended
Jun. 30, 2011
Notes To Consolidated Financial Statements [Abstract]  
Schedule Of Regulatory Assets Text Block
Regulatory Assets: The components of regulatory assets are as follows:
      
 As of June 30, 2011 As of December 31, 2010
(Millions of Dollars)NU NU
Deferred Benefit Costs$ 1,036.1 $ 1,094.2
Regulatory Assets Offsetting Derivative Liabilities  866.9   859.7
Securitized Assets  137.3   171.7
Income Taxes, Net  419.0   401.5
Unrecovered Contractual Obligations  112.4   123.2
Regulatory Tracker Deferrals  48.3   70.3
Storm Cost Deferrals  77.3   60.1
Asset Retirement Obligations   46.9   45.3
Losses on Reacquired Debt  22.3   21.5
Deferred Environmental Remediation Costs  39.8   36.8
Deferred Operation and Maintenance Costs  7.8   29.5
Other Regulatory Assets  84.1   81.5
Total Regulatory Assets$ 2,898.2 $ 2,995.3
Less: Current Portion$ 242.1 $ 238.7
Total Long-Term Regulatory Assets$ 2,656.1 $ 2,756.6

 As of June 30, 2011 As of December 31, 2010
(Millions of Dollars)CL&P PSNH WMECO CL&P PSNH WMECO
Deferred Benefit Costs$ 445.6 $ 145.9 $ 91.2 $ 471.8 $ 152.6 $ 96.0
Regulatory Assets Offsetting Derivative Liabilities  859.8   6.7   -   846.2   12.8   -
Securitized Assets  -   103.6   33.7   -   129.8   41.9
Income Taxes, Net  340.4   35.2   16.6   328.9   31.4   16.8
Unrecovered Contractual Obligations  89.6   -   22.8   97.9   -   25.3
Regulatory Tracker Deferrals  13.9   13.9   16.0   35.5   14.7   15.2
Storm Cost Deferrals  10.4   48.5   18.4   4.0   40.7   15.4
Asset Retirement Obligations   26.0   14.9   3.1   24.9   14.7   3.0
Losses on Reacquired Debt  11.1   9.5   0.3   11.2   8.4   0.4
Deferred Environmental Remediation Costs  -   9.7   -   -   9.7   -
Deferred Operation and Maintenance Costs  7.8   -   -   29.5   -   -
Other Regulatory Assets  27.5   26.4   9.3   29.0   19.6   13.1
Total Regulatory Assets$ 1,832.1 $ 414.3 $ 211.4 $ 1,878.9 $ 434.4 $ 227.1
Less: Current Portion$ 163.9 $ 38.7 $ 19.5 $ 157.5 $ 39.2 $ 19.5
Total Long-Term Regulatory Assets$ 1,668.2 $ 375.6 $ 191.9 $ 1,721.4 $ 395.2 $ 207.6
Schedule Of Regulatory Liabilities Text Block
Regulatory Liabilities: The components of regulatory liabilities are as follows:
      
 As of June 30, 2011 As of December 31, 2010
(Millions of Dollars)NU NU
Cost of Removal$ 186.7 $ 194.8
Regulatory Liabilities Offsetting Derivative Assets  -   38.1
Regulatory Tracker Deferrals  124.4   95.1
AFUDC Transmission Incentive  67.5   62.1
Pension Liability - Yankee Gas Acquisition  11.3   12.5
Overrecovered Spent Nuclear Fuel Costs and Contractual Obligations  14.6   14.6
Wholesale Transmission Overcollections  8.7   13.7
Other Regulatory Liabilities  13.7   8.2
Total Regulatory Liabilities$ 426.9 $ 439.1
Less: Current Portion$ 153.0 $ 99.4
Total Long-Term Regulatory Liabilities$ 273.9 $ 339.7

  As of June 30, 2011 As of December 31, 2010
(Millions of Dollars)CL&P PSNH WMECO CL&P PSNH WMECO
Cost of Removal$ 72.8 $ 55.8 $ 9.3 $ 78.6 $ 57.3 $ 9.5
Regulatory Liabilities Offsetting                 
 Derivative Assets  -   -   -   38.1   -   -
Regulatory Tracker Deferrals  84.8   19.4   11.6   79.4   6.6   4.8
AFUDC Transmission Incentive   58.2   -   9.3   56.5   -   5.6
Overrecovered Spent Nuclear Fuel Costs and                  
 Contractual Obligations  14.6   -   -   14.6   -   -
Wholesale Transmission Overcollections  7.6   -   1.1   13.7   -   -
WMECO Provision For Rate Refunds  -   -   1.8   -   -   2.0
Other Regulatory Liabilities  6.5   4.3   0.4   1.2   3.1   1.1
Total Regulatory Liabilities$ 244.5 $ 79.5 $ 33.5 $ 282.1 $ 67.0 $ 23.0
Less: Current Portion$ 102.9 $ 22.4 $ 16.6 $ 75.7 $ 8.4 $ 8.0
Total Long-Term Regulatory Liabilities$ 141.6 $ 57.1 $ 16.9 $ 206.4 $ 58.6 $ 15.0