Derivative Instruments and Hedging Activities - Other Derivatives (Details) - Not designated as hedging instruments - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Gain (Loss) on Derivative Instruments:
Amount of gain (loss) recognized in income on derivative	$ 40.7	$ (36.7)	$ (48.6)	$ (33.3)
Commodity swaps | Cost of goods sold
Gain (Loss) on Derivative Instruments:
Amount of gain (loss) recognized in income on derivative	41.4	(25.3)	(46.5)	(29.8)
Warrants | Other income (expense), net
Gain (Loss) on Derivative Instruments:
Amount of gain (loss) recognized in income on derivative	$ (0.7)	$ (11.4)	$ (2.1)	$ (3.5)