Derivatives (Tables)

3 Months Ended

Mar. 31, 2026

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivatives Not Designated as Hedging Instruments

The following tables set forth the Company's derivative assets and liabilities that were accounted for at fair value and not designated as cash flow hedges as of March 31, 2026 and December 31, 2025, respectively:

	Asset Fair Value
	March 31, 2026		December 31, 2025
Commodity contracts(1)	$	8.2	$	1.9

	Liability Fair Value
	March 31, 2026		December 31, 2025
Commodity contracts(1)	$	120.6	$	66.0

(1)Commodity contracts reflect our outstanding LME and MWP forward financial sales contracts, Indiana Hub power price swaps, fixed for floating swaps, and HFO price swaps.

Schedule of Derivative Instruments

The following table summarizes the net loss on forward and derivative contracts:

	Three months ended March 31,
	2026		2025
Commodity contracts	$	(65.3)	$	(5.5)