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v3.19.3.a.u2

Summary of Significant Accounting Policies and Other Matters - Recoverable Energy Costs (Details) | 12 Months Ended
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Dec. 31, 2019
Minimum |
Public Utilities, General Disclosures [Line Items] |
Recovery or refund of energy costs, deferral period | 1 month
Maximum |
Public Utilities, General Disclosures [Line Items] |
Recovery or refund of energy costs, deferral period | 2 months

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