Derivative Instruments - Derivative Assets and Liabilities (Details) $ in Millions	Mar. 31, 2026 USD ($)	Mar. 31, 2026 bbl	Mar. 31, 2026 MMBTU	Mar. 31, 2026 rIN	Dec. 31, 2025 USD ($)	Dec. 31, 2025 bbl	Dec. 31, 2025 MMBTU	Dec. 31, 2025 rIN
Derivatives, Fair Value [Line Items]
Assets	$ 183.2				$ 15.0
Less: Counterparty netting and cash collateral, assets	165.8				14.3
Total net fair value of derivative assets	17.4				0.7
Liabilities	(210.7)				(21.7)
Less: Counterparty netting and cash collateral, liabilities	(205.0)				(16.7)
Total net fair value of derivative liabilities	(5.7)				(5.0)
Cash collateral	39.2				2.4
Commodity derivatives
Derivatives, Fair Value [Line Items]
Open derivative positions		31,373,000	0			8,950,000	0
Commodity derivatives | Derivatives not designated as hedging instruments: | Other current assets
Derivatives, Fair Value [Line Items]
Assets	177.1				15.0
Liabilities	(203.9)				(16.7)
Commodity derivatives | Derivatives not designated as hedging instruments: | Other long-term assets
Derivatives, Fair Value [Line Items]
Assets	2.1				0.0
Liabilities	(1.1)				0.0
RINs commitment contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Open derivative positions | rIN				20,636,802				112,250,000
RINs commitment contracts | Derivatives not designated as hedging instruments: | Other current assets
Derivatives, Fair Value [Line Items]
Assets	2.3				0.0
Liabilities	0.0				0.0
RINs commitment contracts | Derivatives not designated as hedging instruments: | Other current liabilities
Derivatives, Fair Value [Line Items]
Assets	0.0				0.0
Liabilities	(3.1)				(2.7)
Interest Rate Swap | Derivatives not designated as hedging instruments: | Other current assets
Derivatives, Fair Value [Line Items]
Assets	1.7				0.0
Liabilities	0.0				0.0
Interest Rate Swap | Derivatives not designated as hedging instruments: | Other long-term liabilities
Derivatives, Fair Value [Line Items]
Assets	0.0				0.0
Liabilities	$ (2.6)				$ (2.3)