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Regulatory Matters (Tables) | 3 Months Ended
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Mar. 31, 2024
Regulated Operations [Abstract] |
Schedule of Regulatory Assets and Liabilities | We had the following regulatory assets and liabilities (in millions):
| As of |  | As of |
| March 31, 2024 |  | December 31, 2023 |
Regulatory assets |  |  |  |
Winter Storm Uri | $ | 144.9 |  | $ | 199.6 |
Deferred energy and fuel cost adjustments |  | 57.5 |  |  | 55.1 |
Deferred gas cost adjustments |  | 8.1 |  |  | 4.1 |
Gas price derivatives |  | - |  |  | 5.1 |
Deferred taxes on AFUDC |  | 7.4 |  |  | 7.1 |
Employee benefit plans and related deferred taxes |  | 88.2 |  |  | 89.3 |
Environmental |  | 5.9 |  |  | 2.9 |
Loss on reacquired debt |  | 17.0 |  |  | 17.4 |
Deferred taxes on flow through accounting |  | 80.5 |  |  | 74.7 |
Decommissioning costs |  | 2.4 |  |  | 2.4 |
Other regulatory assets |  | 19.2 |  |  | 22.4 |
Total regulatory assets |  | 431.1 |  |  | 480.1 |
Less current regulatory assets |  | (147.3 | ) |  | (175.7 | )
Regulatory assets, non-current | $ | 283.8 |  | $ | 304.4 |
Regulatory liabilities |  |  |  |
Deferred energy and gas costs | $ | 85.7 |  | $ | 88.9 |
Employee benefit plan costs and related deferred taxes |  | 35.7 |  |  | 36.2 |
Cost of removal |  | 182.2 |  |  | 181.9 |
Excess deferred income taxes |  | 243.2 |  |  | 247.1 |
Other regulatory liabilities |  | 6.6 |  |  | 12.5 |
Total regulatory liabilities |  | 553.4 |  |  | 566.6 |
Less current regulatory liabilities |  | (89.9 | ) |  | (98.9 | )
Regulatory liabilities, non-current | $ | 463.5 |  | $ | 467.7 |

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