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ACQUISITION OF ASSETS OF COLUMBIA GAS OF MASSACHUSETTS - Preliminary Allocation of the Cash Purchase Price (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Oct. 09, 2020
Dec. 31, 2019
Business Acquisition [Line Items]        
Goodwill $ 4,477,269 $ 4,445,988   $ 4,427,000
CMA        
Business Acquisition [Line Items]        
Current Assets     $ 138,000  
Restricted Cash     57,000  
PP&E     1,182,000  
Goodwill     52,000  
Other Noncurrent Assets, excluding Goodwill     131,000  
Other Current Liabilities     (81,000)  
Other Noncurrent Liabilities     (310,000)  
Cash Purchase Price     $ 1,169,000