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v3.21.2

Commitments and Contingencies (Details-1) $ in Millions | Sep. 30, 2021 USD ($)
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Columbia Units [Member] |
Public Utilities, General Disclosures [Line Items] |
Projected Costs For Environmental Regulation | $ 4
Elm Road Units [Member] |
Public Utilities, General Disclosures [Line Items] |
Projected Costs For Environmental Regulation | $ 4

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- Definition Projected costs for environmental regulations. + References No definition available. + Details
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Balance Type: | debit
Period Type: | instant

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

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