Description of the Business and Significant Accounting Policies - Derivative Financial Instruments (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Derivative Financial Instruments
Margin deposit assets	$ 17.9		$ 17.9		$ 112.2
Recognized gain (losses) on derivatives	$ (98.7)	$ 4.7	$ (159.5)	$ (27.6)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Cost of Goods and Services Sold	Cost of Goods and Services Sold	Cost of Goods and Services Sold	Cost of Goods and Services Sold
Commodity contract \| Futures
Derivative Financial Instruments
Derivative assets	$ 81.8		$ 81.8		$ 56.2

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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+ Details

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details