Derivatives - Net Gain (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Derivative [Line Items]
Derivative, (loss) gain on derivative, net	$ (57.5)	$ (57.0)
Commodity contract
Derivative [Line Items]
Derivative, (loss) gain on derivative, net	(59.1)	(56.0)
Commodity contract | Glencore
Derivative [Line Items]
Derivative, (loss) gain on derivative, net	(14.9)	(58.9)
Foreign exchange contract
Derivative [Line Items]
Derivative, (loss) gain on derivative, net	$ 1.6	$ (1.0)