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NATURE OF BUSINESS, SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND OTHER - Property, Plant and Equipment (Details) | 12 Months Ended
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Dec. 31, 2020
Property, Plant and Equipment [Line Items] |
Period before costs expensed for no proved reserves | 1 year
Maximum | Gas plant and power plant assets |
Property, Plant and Equipment [Line Items] |
Expected useful lives | 30 years
Maximum | Other non- producing property and equipment |
Property, Plant and Equipment [Line Items] |
Expected useful lives | 20 years

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- Definition Property, Plant and Equipment, Period Before Costs Expensed For No Proved Reserves + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |