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COMMITMENTS AND CONTINGENCIES (Tables)
9 Months Ended
Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract]  
Schedule of regulatory assets and reserves related to manufactured gas plant sites
We have established the following regulatory assets and reserves for manufactured gas plant sites:
(in millions)September 30, 2020December 31, 2019
Regulatory assets$696.6 $685.5 
Reserves for future environmental remediation589.4 589.2