Fair Value Measurements (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Liabilities
Cash collateral (obligation)	$ 142.8	$ (24.7)
Fair Value, Measurements, Recurring
Assets
Total assets	451.9	130.7
Liabilities
Total liabilities	(1,276.7)	(768.8)
Net liabilities	(824.8)	(638.1)
Fair Value, Measurements, Recurring | Commodity contracts
Assets
Total assets	429.5	129.1
Liabilities
Total liabilities	(502.9)	(108.4)
Fair Value, Measurements, Recurring | Commodities Investment
Assets
Total assets	19.7
Fair Value, Measurements, Recurring | RINs commitment contracts
Assets
Total assets	2.7	1.6
Liabilities
Total liabilities	(7.0)	(0.7)
Fair Value, Measurements, Recurring | Environmental Credits Obligation
Liabilities
Total liabilities	(177.5)	(172.2)
Fair Value, Measurements, Recurring | J. Aron supply and offtake obligations
Liabilities
Total liabilities	(589.3)	(487.5)
Fair Value, Measurements, Recurring | Level 1
Assets
Total assets	19.7	0.0
Liabilities
Total liabilities	0.0	0.0
Net liabilities	19.7	0.0
Fair Value, Measurements, Recurring | Level 1 | Commodity contracts
Assets
Total assets	0.0	0.0
Liabilities
Total liabilities	0.0	0.0
Fair Value, Measurements, Recurring | Level 1 | Commodities Investment
Assets
Total assets	19.7
Fair Value, Measurements, Recurring | Level 1 | RINs commitment contracts
Assets
Total assets	0.0	0.0
Liabilities
Total liabilities	0.0	0.0
Fair Value, Measurements, Recurring | Level 1 | Environmental Credits Obligation
Liabilities
Total liabilities	0.0	0.0
Fair Value, Measurements, Recurring | Level 1 | J. Aron supply and offtake obligations
Liabilities
Total liabilities	0.0	0.0
Fair Value, Measurements, Recurring | Level 2
Assets
Total assets	432.2	130.7
Liabilities
Total liabilities	(1,276.7)	(768.8)
Net liabilities	(844.5)	(638.1)
Fair Value, Measurements, Recurring | Level 2 | Commodity contracts
Assets
Total assets	429.5	129.1
Liabilities
Total liabilities	(502.9)	(108.4)
Fair Value, Measurements, Recurring | Level 2 | Commodities Investment
Assets
Total assets	0.0
Fair Value, Measurements, Recurring | Level 2 | RINs commitment contracts
Assets
Total assets	2.7	1.6
Liabilities
Total liabilities	(7.0)	(0.7)
Fair Value, Measurements, Recurring | Level 2 | Environmental Credits Obligation
Liabilities
Total liabilities	(177.5)	(172.2)
Fair Value, Measurements, Recurring | Level 2 | J. Aron supply and offtake obligations
Liabilities
Total liabilities	589.3	(487.5)
Fair Value, Measurements, Recurring | Level 3
Assets
Total assets	0.0	0.0
Liabilities
Total liabilities	0.0	0.0
Net liabilities	0.0	0.0
Fair Value, Measurements, Recurring | Level 3 | Commodity contracts
Assets
Total assets	0.0	0.0
Liabilities
Total liabilities	0.0	0.0
Fair Value, Measurements, Recurring | Level 3 | Commodities Investment
Assets
Total assets	0.0
Fair Value, Measurements, Recurring | Level 3 | RINs commitment contracts
Assets
Total assets	0.0	0.0
Liabilities
Total liabilities	0.0	0.0
Fair Value, Measurements, Recurring | Level 3 | Environmental Credits Obligation
Liabilities
Total liabilities	0.0	0.0
Fair Value, Measurements, Recurring | Level 3 | J. Aron supply and offtake obligations
Liabilities
Total liabilities	$ 0.0	$ 0.0