COMMITMENTS AND CONTINGENCIES (Details) $ in Millions |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
|
Jun. 30, 2020
USD ($)
|
Dec. 31, 2017
USD ($)
|
Jun. 30, 2020
USD ($)
|
Sep. 30, 2018 |
Jun. 30, 2018 |
|
| Commitments and Contingencies [Line Items] | |||||
| Document Period End Date | Jun. 30, 2020 | ||||
| Number Of Former Manufactured Gas Sites Where We Own Or Retain Legal Responsibility For Environmental Conditions | 12 | ||||
| Environmental Reserve Estimate Range, Low | $ 2.0 | ||||
| Environmental Reserve Estimate Range, High | $ 6.0 | ||||
| Accrual for Environmental Loss Contingencies, Revision in Estimates | $ 2.0 | ||||
| Number of sites where regulatory closure has been achieved | 3 | ||||
| AAO associated with MGP costs requested amount, cap | $ 15.0 | ||||
| Number of sites with ongoing groundwater monitoring | 8 | ||||
| Percentage yield of high consequence pipeline areas | 30.00% | 30.00% | |||