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Financing - Schedule of Short-term Debt and Narrative (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2022
Short-Term Debt [Line Items] |  |  |
Amount outstanding | $ 0 |  | $ 535,600
Revolving Credit Facility | Commercial Paper |  |  |
Short-Term Debt [Line Items] |  |  |
Amount outstanding | 0 |  | 535,600
Letters of Credit | 2,751 |  | 24,626
Available capacity | 747,249 |  | $ 189,774
Weighted average interest rates |  |  | 4.88%
Maximum amount outstanding (based on daily outstanding balances) | 548,700 | $ 429,000 |
Average amount outstanding (based on daily outstanding balances) | $ 164,719 | $ 326,172 |
Weighted average interest rates | 4.91% | 0.82% |

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