Derivatives - Components of Commodity Swap Gain (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Derivatives
Change in fair value of interest rate swaps	$ (1.4)	$ (15.1)
Gain (loss) on derivative activity	11.9	(31.2)
Commodity swaps
Derivatives
Change in fair value of interest rate swaps	(1.4)	(15.1)
Realized gain (loss) on derivatives	13.3	(16.1)
Gain (loss) on derivative activity	$ 11.9	$ (31.2)

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

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-Publisher FASB
-Name Accounting Standards Codification
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Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4CC
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Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects.

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