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Risk Management Activities (Schedule of Gains (Losses) on Commodity Price Risk Programs) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Deferred Derivative Gain (Loss)
Derivative Instruments, Gain (Loss) [Line Items]
Regulatory Liabilities	$ 52.3	$ 90.0
Deferred Derivative Gain (Loss)
Derivative Instruments, Gain (Loss) [Line Items]
Regulatory Assets	$ 21.7	$ 10.0

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The amount for the individual regulatory asset as itemized in a table of regulatory assets as of the end of the period.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 980
-SubTopic 340
-Section 50
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-Topic 980
-SubTopic 405
-Section 25
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