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Risk Management Activities (Tables) | 6 Months Ended
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Jun. 30, 2025
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value | Risk management assets and liabilities on our derivatives are presented on the Condensed Consolidated Balance Sheets (unaudited) as shown below:
| June 30, 2025 |  | December 31, 2024
(in millions) | Assets |  | Liabilities |  | Assets |  | Liabilities
Current(1) |  |  |  |  |  |  |
Derivatives not designated as hedging instruments | $ | 16.6 |  |  | $ | 1.7 |  |  | $ | 9.1 |  |  | $ | 2.3 |
Total | $ | 16.6 |  |  | $ | 1.7 |  |  | $ | 9.1 |  |  | $ | 2.3 |
Noncurrent(2) |  |  |  |  |  |  |
Derivatives not designated as hedging instruments | $ | 20.3 |  |  | $ | 3.8 |  |  | $ | 17.9 |  |  | $ | 1.2 |
Total | $ | 20.3 |  |  | $ | 3.8 |  |  | $ | 17.9 |  |  | $ | 1.2 |
(1)Current assets and liabilities are presented in "Other current assets" and "Other accruals", respectively, on the Condensed Consolidated Balance Sheets (unaudited). (2)Noncurrent assets and liabilities are presented in "Deferred charges and other" and "Other noncurrent liabilities and deferred credits", respectively, on the Condensed Consolidated Balance Sheets (unaudited).
Derivative Instruments, Gain (Loss) | The following table summarizes the gains and losses associated with the commodity price risk programs deferred as regulatory assets and liabilities:
(in millions) | June 30, 2025 |  | December 31, 2024
Regulatory Assets |  |  |
Losses on commodity price risk programs | $ | 6.9 |  |  | $ | 6.5 |
Regulatory Liabilities |  |  |
Gains on commodity price risk programs | 40.1 |  |  | 28.7 |
Our derivative instruments measured at fair value as of June 30, 2025 and December 31, 2024 do not contain any credit-risk-related contingent features.

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- Definition Tabular disclosure of the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) on derivative instruments and nonderivative instruments designated and qualified as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4E -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4E Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4C Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A + Details
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- Definition Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4B + Details
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