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Commitments and Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract] |
Gas And Electric Supply Contractual Obligations | The following table lists the Company’s known specified gas and electric supply contractual obligations as of December 31, 2022.
|  |  |  |  | Payments Due by Period |
Gas and Electric Supply Contractual Obligations (millions) as of December 31, 2022 |  | Total |  |  | 2023 |  |  | 2024 |  |  | 2025 |  |  | 2026 |  |  | 2027 |  |  | 2028 & Beyond |
Gas Supply Contracts |  | $ | 514.6 |  |  | $ | 66.5 |  |  | $ | 47.4 |  |  | $ | 45.2 |  |  | $ | 44.3 |  |  | $ | 43.8 |  |  | $ | 267.4 |
Electric Supply Contracts |  |  | 12.5 |  |  |  | 1.2 |  |  |  | 1.2 |  |  |  | 1.2 |  |  |  | 1.2 |  |  |  | 1.2 |  |  |  | 6.5 |
Total |  | $ | 527.1 |  |  | $ | 67.7 |  |  | $ | 48.6 |  |  | $ | 46.4 |  |  | $ | 45.5 |  |  | $ | 45.0 |  |  | $ | 273.9 |
Environmental Obligations Recognized by Company | The following table sets forth a summary of changes in the Company’s liability for Environmental Obligations for the years-ended December 31, 2022 and 2021.
|  | December 31, |
Environmental Obligations (millions) |  | 2022 |  |  | 2021 |
Total Balance at Beginning of Period |  | $ | 2.7 |  |  | $ | 2.1 |
Additions |  |  | 2.0 |  |  |  | 0.9 |
Less: Payments / Reductions |  |  | 0.3 |  |  |  | 0.3 |
Total Balance at End of Period |  |  | 4.4 |  |  |  | 2.7 |
Less: Current Portion |  |  | 0.6 |  |  |  | 0.5 |
Noncurrent Balance at End of Period |  | $ | 3.8 |  |  | $ | 2.2 |

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- Definition Tabular disclosure of contractual obligation by timing of payment due. Includes, but is not limited to, long-term debt obligation, lease obligation, and purchase obligation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 303 -Paragraph (a) -Subparagraph (5) + Details
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- Definition Tabular disclosure of environmental loss contingencies by individual site. Does not include loss contingencies that are not environmental in nature. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.Y.Q1) -URI https://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 10 -Subparagraph (d)(2) -URI https://asc.fasb.org/extlink&oid=6393242&loc=d3e13237-110859 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 10 -Subparagraph (d)(1) -URI https://asc.fasb.org/extlink&oid=6393242&loc=d3e13237-110859 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.Y.Q2) -URI https://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 10 -Subparagraph (d)(3) -URI https://asc.fasb.org/extlink&oid=6393242&loc=d3e13237-110859 + Details
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