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v3.22.2.2

Significant Segment Financial Data (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Dec. 31, 2021
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |
Total Operating Revenues | $ 110.2 | $ 98.1 | $ 401.7 | $ 333.5 |
Segment Profit (Loss) | 0.5 |  | 26.9 | 21.6 |
Identifiable Segment Assets | 1,578.9 | 1,509.0 | 1,578.9 | 1,509.0 | $ 1,540.3
Capital Expenditures | 37.2 | 39.0 | 82.5 | 81.5 |
Billed and Unbilled Revenue |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |
Total Operating Revenues | 105.2 | 88.1 | 417.3 | 343.4 |
Rate Adjustment Mechanism Revenue |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |
Total Operating Revenues | 5.0 | 10.0 | (15.6) | (9.9) |
Gas Segment |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |
Total Operating Revenues | 34.5 | 32.6 | 182.5 | 151.3 |
Segment Profit (Loss) | (5.3) | (4.1) | 14.5 | 12.1 |
Identifiable Segment Assets | 967.5 | 906.2 | 967.5 | 906.2 |
Capital Expenditures | 28.9 | 28.5 | 59.9 | 51.7 |
Gas Segment | Billed and Unbilled Revenue |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |
Total Operating Revenues | 27.4 | 23.1 | 190.6 | 154.3 |
Gas Segment | Rate Adjustment Mechanism Revenue |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |
Total Operating Revenues | 7.1 | 9.5 | (8.1) | (3.0) |
Electric |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |
Total Operating Revenues | 75.7 | 65.5 | 219.2 | 182.2 |
Segment Profit (Loss) | 5.9 | 4.4 | 13.2 | 10.7 |
Identifiable Segment Assets | 590.9 | 583.6 | 590.9 | 583.6 |
Capital Expenditures | 8.3 | 10.1 | 22.5 | 28.8 |
Electric | Billed and Unbilled Revenue |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |
Total Operating Revenues | 77.8 | 65.0 | 226.7 | 189.1 |
Electric | Rate Adjustment Mechanism Revenue |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |
Total Operating Revenues | (2.1) | 0.5 | (7.5) | (6.9) |
All Other Segments |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |
Segment Profit (Loss) | (0.1) | (0.3) | (0.8) | (1.3) |
Identifiable Segment Assets | $ 20.5 | 19.2 | 20.5 | 19.2 |
Capital Expenditures |  | $ 0.4 | $ 0.1 | 1.0 |
Non- Regulated Operation |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |
Segment Profit (Loss) |  |  |  | $ 0.1 |

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