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Derivative Instruments (Details) $ in Millions	6 Months Ended
	Jun. 30, 2024 USD ($) MWh	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount of outstanding swap agreements | MWh	221,200
Derivative liability	$ 2.0
Swap
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Loss on derivatives, net	2.7	$ 16.0
Other Current Liabilities
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative liability	1.5		$ 4.2
Other Noncurrent Liabilities
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative liability	$ 0.5

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- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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