Description of the Business and Significant Accounting Policies (Derivative Financial Instruments)) (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Commodity contract \| Futures
Derivative Financial Instruments [Line Items]
Derivative Asset	$ 19.8	$ 24.0

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