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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
3 Months Ended
Mar. 31, 2021
Components of Gas and Electric Operating Revenue
    
Three Months Ended March 31, 2021
 
Gas and Electric Operating Revenues ($ millions):
  
Gas
    
Electric
    
Total
 
Billed and Unbilled Revenue:
        
Residential
   $ 37.7      $ 38.1      $ 75.8  
C&I
     50.1        25.9        76.0  
Other
     5.4        1.8        7.2  
    
 
 
    
 
 
    
 
 
 
Total Billed and Unbilled Revenue
     93.2        65.8        159.0  
Rate Adjustment Mechanism Revenue
     (14.5      (5.7      (20.2
    
 
 
    
 
 
    
 
 
 
Total Gas and Electric Operating Revenues
  
$
78.7
 
  
$
60.1
 
  
$
138.8
 
    
 
 
    
 
 
    
 
 
 
    
Three Months Ended March 31, 2020
 
Gas and Electric Operating Revenues ($ millions):
  
Gas
    
Electric
    
Total
 
Billed and Unbilled Revenue:
                          
Residential
   $ 31.1      $ 34.4      $ 65.5  
C&I
     42.3        24.1        66.4  
Other
     3.0        2.0        5.0  
    
 
 
    
 
 
    
 
 
 
Total Billed and Unbilled Revenue
     76.4        60.5        136.9  
Rate Adjustment Mechanism Revenue
     (6.2      (0.3      (6.5
    
 
 
    
 
 
    
 
 
 
Total Gas and Electric Operating Revenues
  
$
70.2
 
  
$
60.2
 
  
$
130.4
 
    
 
 
    
 
 
    
 
 
 
Allowance for Doubtful Accounts Included in Accounts Receivable Net
The Allowance for Doubtful Accounts as of March 31, 2021, March 31, 2020 and December 31, 2020, was as follows:
 
($ millions)
             
    
March 31,
     December 31,  
    
2021
     2020      2020  
Allowance for Doubtful Accounts
  
$
4.4
     $ 1.8      $ 3.3  
    
 
 
    
 
 
    
 
 
 
Components of Accrued Revenue The following table shows the components of Accrued Revenue as of March 31, 2021, March 31, 2020 and December 31, 2020.
    
March 31,
    
December 31,
 
Accrued Revenue ($ millions)
  
2021
     2020      2020  
Regulatory Assets – Current
  
$
24.0
 
   $ 28.4      $ 37.3  
Unbilled Revenues, net
  
 
10.7
 
     10.2        13.6  
    
 
 
    
 
 
    
 
 
 
Total Accrued Revenue
  
$
34.7
 
   $ 38.6      $ 50.9  
    
 
 
    
 
 
    
 
 
 
Components of Exchange Gas Receivable
    
March 31,
    
December 31,
 
Exchange Gas Receivable ($ millions)
  
2021
     2020      2020  
Northern Utilities
  
$
1.0
 
   $ 1.9      $ 4.4  
Fitchburg
  
 
0.2
 
     0.3        0.5  
    
 
 
    
 
 
    
 
 
 
Total Exchange Gas Receivable
  
$
1.2
 
   $ 2.2      $ 4.9  
    
 
 
    
 
 
    
 
 
 
 
Components of Gas Inventory
    
March 31,
    
December 31,
 
Gas Inventory ($ millions)
  
2021
     2020      2020  
Natural Gas
  
$
—  
 
   $ —        $ 0.2  
Propane
  
 
0.3
 
     0.3        0.3  
Liquefied Natural Gas & Other
  
 
0.1
 
     0.1        0.1  
    
 
 
    
 
 
    
 
 
 
Total Gas Inventory
  
$
0.4
 
   $ 0.4      $ 0.6  
    
 
 
    
 
 
    
 
 
 
 
Regulatory Assets
    
March 31,
     December 31,  
Regulatory Assets consist of the following ($ millions)
  
2021
     2020      2020  
Retirement Benefits
  
$
104.5
 
   $ 80.8      $ 103.7  
Energy Supply & Other Rate Adjustment Mechanisms
  
 
20.2
 
     25.7        34.1  
Deferred Storm Charges
  
 
3.7
 
     5.3        4.1  
Environmental
  
 
5.0
 
     6.4        5.2  
Income Taxes
  
 
3.2
 
     4.0        3.4  
Other Deferred Charges
  
 
16.1
 
     11.5        14.2  
    
 
 
    
 
 
    
 
 
 
Total Regulatory Assets
  
 
152.7
 
     133.7        164.7  
Less: Current Portion of Regulatory Assets
(1)
  
 
24.0
 
     28.4        37.3  
    
 
 
    
 
 
    
 
 
 
Regulatory Assets – noncurrent
  
$
128.7
 
   $ 105.3      $ 127.4  
    
 
 
    
 
 
    
 
 
 
 
(1)
 
Reflects amounts included in the Accrued Revenue on the Company’s Consolidated Balance Sheets.
 
Regulatory Liabilities
    
March 31,
     December 31,  
Regulatory Liabilities consist of the following ($ millions)
  
2021
     2020      2020  
Income Taxes (Note 8)
  
$
45.1
 
   $ 46.1      $ 45.5  
Rate Adjustment Mechanisms
  
 
12.9
 
     9.1        4.1  
Other
  
 
0.2
 
     0.4        0.2  
    
 
 
    
 
 
    
 
 
 
Total Regulatory Liabilities
  
 
58.2
 
     55.6        49.8  
Less: Current Portion of Regulatory Liabilities
  
 
14.7
 
     10.5        5.5  
    
 
 
    
 
 
    
 
 
 
Regulatory Liabilities – noncurrent
  
$
43.5
 
   $ 45.1      $ 44.3  
    
 
 
    
 
 
    
 
 
 
Fair Value of Marketable Securities Changes in the fair value of these investments are recorded in Other Expense, Net.
    
March 31,
     December 31,  
Fair Value of Marketable Securities ($ millions)
  
2021
     2020      2020  
Money Market Funds
  
$
5.6
 
   $ 5.5      $ 5.7  
    
 
 
    
 
 
    
 
 
 
Total Marketable Securities
  
$
5.6
 
   $ 5.5      $ 5.7  
    
 
 
    
 
 
    
 
 
 
Components of Energy Supply Obligations The following discussion and table summarize the
nature
and amounts of the items recorded as Energy Supply Obligations (current portion) and Other Noncurrent Liabilities (noncurrent portion) on the Company’s Consolidated Balance Sheets.
    
March 31,
    
December 31,
 
Energy Supply Obligations ($ millions)
  
2021
     2020      2020  
Current:
                          
Exchange Gas Obligation
  
$
1.0
 
   $ 1.9      $ 4.4  
Renewable Energy Portfolio Standards
  
 
6.5
 
     5.7        5.7  
Power Supply Contract Divestitures
  
 
0.2
 
     0.3        0.3  
    
 
 
    
 
 
    
 
 
 
Total Energy Supply Obligations - Current
  
 
7.7
 
     7.9        10.4  
Long-Term:
                          
Power Supply Contract Divestitures
  
 
—  
 
     0.2        —    
    
 
 
    
 
 
    
 
 
 
Total Energy Supply Obligations
  
$
7.7
 
   $ 8.1      $ 10.4  
    
 
 
    
 
 
    
 
 
 
Deferred Compensation Plan [Member]  
Fair Value of Marketable Securities Changes in the fair value of these investments are recorded in Other Expense, Net.
    
March 31,
     December 31,  
Fair Value of Marketable Securities ($ millions)
  
2021
     2020      2020  
Equity Funds
  
$
0.3
 
   $ 0.1      $ 0.2  
Money Market Funds
  
 
0.3
 
     0.3        0.3  
    
 
 
    
 
 
    
 
 
 
Total Marketable Securities
  
$
0.6
 
   $ 0.4      $ 0.5