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v3.21.1

Derivative Accounting - Schedule of Gross Notional Amounts Outstanding (Details) - Commodity Contracts GWh in Thousands, Bcf in Thousands | Mar. 31, 2021 GWh Bcf | Dec. 31, 2020 GWh Bcf
--- | --- | ---
Outstanding gross notional amount of derivatives |  |
Power | GWh | 368 | 368
Gas | Bcf | 211 | 205

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